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Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

THERMAL PERFORMANCE OF INSULATING WINDOW SYSTEMS  

E-Print Network (OSTI)

these windows incorporating hear mirror films are staticS. , "Thin Film Coatings for Energy Efficient Windows", LBLglazed windows with single and double plastic film inserts

Selkowitz, Stephen E.

2011-01-01T23:59:59.000Z

2

THERMAL PERFORMANCE OF INSULATING WINDOW SYSTEMS  

E-Print Network (OSTI)

Efficient Use of Energy, New York (1975). Glaser, V.H.J. , "Energy Transport Control in Window Systems", Report ETR-1277-2, Stony Brook, New York, (

Selkowitz, Stephen E.

2011-01-01T23:59:59.000Z

3

Impacts of Operating Hardware on Window Thermal Performance  

E-Print Network (OSTI)

and Renewable Energy, Office of Building Technology,Building Technologies Program of the U.S. Department ofproject ”Improved Window Technologies for Energy Efficient

Hart, Robert

2014-01-01T23:59:59.000Z

4

Shortwave thermal performance for a glass window with a curved venetian blind  

Science Journals Connector (OSTI)

This paper presents a study of thermal performance for a glass window with a curved venetian blind installed on the indoor side in terms of heat gain in the shortwave part of radiation. The curved venetian blind, whose optical properties are considered nonspecular, is modeled as an effective layer. The mathematical model of the combined glass window and venetian blind is developed by combining the mathematical model of glass window and the mathematical model of a curved venetian blind using the matrix layer calculation method. The experiment is performed in a test room to measure the heat gain due to solar radiation passing through the glass window with a curved venetian blind installed in the shortwave part of radiation. The predicted results from the developed model are compared with the experimental results. The agreement between the predicted results and the experimental results is good. From the study it is found that installing a curved venetian blind to the glass window causes a significant reduction in heat gain compared to the plain glass window. The heat gain through the glass window with blind in the shortwave part of radiation (solar heat gain coefficient in the shortwave part of radiation (ShW SHGC)) is analyzed. It is found that the ShW SHGC is mainly affected by the slat properties, slat angle and solar profile angle. The glass window using blind with a lower value of slat reflectance, will have a smaller value of ShW SHGC. The slat distance also affects the ShW SHGC. The glass window using blind with a lower value of slat distance has a lower value of ShW SHGC. The effect of the slat curvature on the ShW SHGC is small when compared to the effect of other parameters. The effects of the investigated parameters on the ShW SHGC for diffuse radiation are similar to the effects on the ShW SHGC for direct radiation. When installing blind to different kinds of glass window other than clear glass window, it is found that the thermal performance is similar to the case of clear glass window. The magnitude of the ShW SHGC for the glass window with blind is also dependent on the optical properties of the glass window used. The glass window with blind using a lower value of the glass transmittance has a lower value of the ShW SHGC. The absorptance of the glass window has direct effect on the solar heat gain coefficient in the longwave part of radiation (LoW SHGC).

Somsak Chaiyapinunt; Nopparat Khamporn

2013-01-01T23:59:59.000Z

5

Detailed thermal performance data on conventional and highly insulating window systems  

SciTech Connect

Data on window heat-transfer properties (U-value and shading coefficient (SC)) are usually presented only for a few window designs at specific environmental conditions. With the introduction of many new window glazing configurations (using low-emissivity coatings and gas fills) and the interest in their annual energy performance, it is important to understand the effects of window design parameters and environmental conditions on U and SC. This paper discusses the effects of outdoor temperature, wind speed, insolation, surface emittance, and gap width on the thermal performance of both conventional and highly insulating windows. Some of these data have been incorporated into the fenestration chapter of the ''ASHRAE Handbook - 1985 Fundamentals.'' The heat-transfer properties of multiglazed insulating window designs are also presented. These window systems include those having (1) one or more low-emittance coatings; (2) low-conductivity gas-fill or evacuated cavities; (3) a layer of transparent silica aerogel, a highly insulating microporous material; or (4) combinations of the above. Using the detailed building energy analysis program, DOE 2.1B, we show that these systems, which all maintain high solar transmittance, can add more useful thermal energy to a space than they lose, even in a northern climate. Thus, in terms of seasonal energy flows, these fenestration systems out-perform insulated walls or roofs.

Arasteh, D.; Selkowitz, S.; Hartmann, J.

1986-01-01T23:59:59.000Z

6

Mobile Window Thermal Test  

NLE Websites -- All DOE Office Websites (Extended Search)

Mobile Window Thermal Test (MoWiTT) Facility Mobile Window Thermal Test (MoWiTT) Facility winter.jpg (469135 bytes) The window has come a long way since the days when it was a single pane of glass in a wood frame. Low-emissivity windows were designed to help buildings retain some of the energy that would have leaked out of less efficient windows. Designing efficient window-and-frame systems is one strategy for reducing the energy use of buildings. But the net energy flowing through a window is a combination of temperature- driven thermal flows and transmission of incident solar energy, both of which vary with time. U-factor and solar heat gain coefficient (SHGC), the window properties that control these flows, depend partly on ambient conditions. Window energy flows can affect how much energy a building uses, depending on when the window flows are available to help meet other energy demands within the building, and when they are adverse, adding to building energy use. This leads to a second strategy for reducing building energy use: using the beneficial solar gain available through a window, either for winter heating or for daylighting, while minimizing adverse flows.

7

High Performance Window Attachments  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

High Performance Window High Performance Window Attachments D. Charlie Curcija Lawrence Berkeley National Laboratory dccurcija@lbl.gov 510-495-2602 April 4, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Impact of Project: * Motivate manufacturers to make improvements in Window systems U-Factors, SHGC and daylighting utilization * Increase awareness of benefits from energy efficient window attachments Problem Statement: * A wide range of residential window attachments are available, but they have widely unknown

8

High Performance Window Retrofit  

SciTech Connect

The US Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) and Traco partnered to develop high-performance windows for commercial building that are cost-effective. The main performance requirement for these windows was that they needed to have an R-value of at least 5 ft2 F h/Btu. This project seeks to quantify the potential energy savings from installing these windows in commercial buildings that are at least 20 years old. To this end, we are conducting evaluations at a two-story test facility that is representative of a commercial building from the 1980s, and are gathering measurements on the performance of its windows before and after double-pane, clear-glazed units are upgraded with R5 windows. Additionally, we will use these data to calibrate EnergyPlus models that we will allow us to extrapolate results to other climates. Findings from this project will provide empirical data on the benefits from high-performance windows, which will help promote their adoption in new and existing commercial buildings. This report describes the experimental setup, and includes some of the field and simulation results.

Shrestha, Som S [ORNL] [ORNL; Hun, Diana E [ORNL] [ORNL; Desjarlais, Andre Omer [ORNL] [ORNL

2013-12-01T23:59:59.000Z

9

Experimental and Numerical Examination of the Thermal Transmittance of High Performance Window Frames  

E-Print Network (OSTI)

windows are often called passive -house wind ows, as windowse window frames, like passive-house windows. In this p aperare supposed to satisfy the Passive house requirements of

Gustavsen Ph.D., Arild

2010-01-01T23:59:59.000Z

10

High Performance Windows Volume Purchase: The Windows Volume Purchase RFP  

NLE Websites -- All DOE Office Websites (Extended Search)

The Windows The Windows Volume Purchase RFP to someone by E-mail Share High Performance Windows Volume Purchase: The Windows Volume Purchase RFP on Facebook Tweet about High Performance Windows Volume Purchase: The Windows Volume Purchase RFP on Twitter Bookmark High Performance Windows Volume Purchase: The Windows Volume Purchase RFP on Google Bookmark High Performance Windows Volume Purchase: The Windows Volume Purchase RFP on Delicious Rank High Performance Windows Volume Purchase: The Windows Volume Purchase RFP on Digg Find More places to share High Performance Windows Volume Purchase: The Windows Volume Purchase RFP on AddThis.com... Home About FAQs Low-E Storm Windows Request for Proposal Contacts For Builders For Residential Buyers For Light Commercial Buyers For Manufacturers

11

High Performance Windows Volume Purchase: About the High Performance  

NLE Websites -- All DOE Office Websites (Extended Search)

High Performance Windows Volume Purchase: About the High Performance Windows Volume Purchase: About the High Performance Windows Volume Purchase Program to someone by E-mail Share High Performance Windows Volume Purchase: About the High Performance Windows Volume Purchase Program on Facebook Tweet about High Performance Windows Volume Purchase: About the High Performance Windows Volume Purchase Program on Twitter Bookmark High Performance Windows Volume Purchase: About the High Performance Windows Volume Purchase Program on Google Bookmark High Performance Windows Volume Purchase: About the High Performance Windows Volume Purchase Program on Delicious Rank High Performance Windows Volume Purchase: About the High Performance Windows Volume Purchase Program on Digg Find More places to share High Performance Windows Volume Purchase:

12

High Performance Windows Volume Purchase: Information Resources  

NLE Websites -- All DOE Office Websites (Extended Search)

Information Information Resources to someone by E-mail Share High Performance Windows Volume Purchase: Information Resources on Facebook Tweet about High Performance Windows Volume Purchase: Information Resources on Twitter Bookmark High Performance Windows Volume Purchase: Information Resources on Google Bookmark High Performance Windows Volume Purchase: Information Resources on Delicious Rank High Performance Windows Volume Purchase: Information Resources on Digg Find More places to share High Performance Windows Volume Purchase: Information Resources on AddThis.com... Home About For Builders For Residential Buyers For Light Commercial Buyers For Manufacturers For Utilities Information Resources Information Resources Numerous publications will be available to help educate buyers, product

13

High Performance Windows Volume Purchase: Contacts  

NLE Websites -- All DOE Office Websites (Extended Search)

Contacts to Contacts to someone by E-mail Share High Performance Windows Volume Purchase: Contacts on Facebook Tweet about High Performance Windows Volume Purchase: Contacts on Twitter Bookmark High Performance Windows Volume Purchase: Contacts on Google Bookmark High Performance Windows Volume Purchase: Contacts on Delicious Rank High Performance Windows Volume Purchase: Contacts on Digg Find More places to share High Performance Windows Volume Purchase: Contacts on AddThis.com... Home About For Builders For Residential Buyers For Light Commercial Buyers For Manufacturers For Utilities Information Resources Contacts Web site and High Performance Windows Volume Purchase Program contacts are provided below. Website Contact Send us your comments, report problems, and/or ask questions about

14

Vacuum Glazing; A Thermally Insulating Window Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacuum Glazing; A Thermally Insulating Window Technology Vacuum Glazing; A Thermally Insulating Window Technology Speaker(s): Cenk Kocer Date: May 31, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Sunnie Lim The vacuum glazing consists of two panes of glass separated by a sub-millimetre vacuum gap. Under the action of atmospheric pressure the separation of the panes is maintained by an array of high strength spacers in the gap. The glass panes are hermetically sealed at the edge using a low melting point glass frit (solder glass). Since 1913 many have worked on a practical implementation of such a flat insulating glass structure, with success finally being reported in 1989 by Collins et al. at the University of Sydney. The purpose of this talk is to present a brief history of the vacuum glazing research at the University of Sydney, and outline in detail

15

Measure Guideline: Energy-Efficient Window Performance and Selection  

SciTech Connect

This document provides guidelines for the selection of energy-efficient windows in new and existing residential construction in all US climate zones. It includes information on window products, their attributes and performance. It provides cost/benefit information on window energy savings as well as information on non-energy benefits such as thermal comfort and reduced HVAC demands. The document also provides information on energy impacts of design decisions such as window orientation, total glazing area and shading devices and conditions. Information on resources for proper window installation is included as well. This document is for builders, homeowners, designers and anyone making decisions about selecting energy efficient window. It is intended to complement other Building America information and efforts.

Carmody, J.; Haglund, K.

2012-11-01T23:59:59.000Z

16

Performance tests of large thin vacuum windows  

SciTech Connect

Tests of thin composition vacuum windows of the type used for the Tagger in Hall B at the Thomas Jefferson National Accelerator Facility are described. Three different tests have been performed. These include: (1) measurement of the deformation and durability of a window under long term (>8 years) almost continuous vacuum load, (2) measurement of the deformation as a function of flexing of the window as it is cycled between vacuum and atmosphere, and (3) measurement of the relative diffusion rate of gas through a variety of thin window membranes.

Hall Crannell

2011-02-01T23:59:59.000Z

17

Key Elements of and Materials Performance Targets for Highly Insulating Window Frames  

E-Print Network (OSTI)

Norway Abstract The thermal performance of windows is important for energyNorway Norwegian University of Science and Technology Howdy Goudey Lawrence Berkeley National Laboratory Environmental Energy

Gustavsen, Arild

2012-01-01T23:59:59.000Z

18

MoWiTT:Mobile Window Thermal Test Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

0 0 MoWiTT: Mobile Window Thermal Test Facility The window has come a long way since the days when it was a single pane of glass in a wood frame. Low-emissivity windows were designed to help buildings retain some of the energy that would have leaked out of less efficient windows. Designing efficient window-and-frame systems requires accurate measurement of the flow of energy through windows in realistic conditions, a capability provided by the Mobile Window Thermal Test facility. Consisting of a pair of outdoor, room-sized calorimeters, MoWiTT measures the net energy flow through two window samples in side-by-side tests using ambient weather conditions. MoWiTT characterizes the net energy flow as a function of time and measures the temperatures, solar fluxes, and

19

Thermal and Structural Analysis of Targets and Windows  

E-Print Network (OSTI)

Thermal and Structural Analysis of Targets and Windows Materials, Irradiation Data and Fracture) = EDD/Cp Applied Thermal Stress Pa CTE*E*DeltaT Thermal Resistance Rts=UTS/(CTE*E *DeltaT) Thermal Shock 1147 1.16E+09 0.984 7445 Candidate Materials - Young's Modulus, UTS, Delta T, Thermal Stress

McDonald, Kirk

20

Effects of Overhangs on the Performance of Electrochromic Windows  

E-Print Network (OSTI)

issues for large-area electrochromic windows in commercialenergy performance of electrochromic windows controlled forwindows.lbl.gov/comm_perf/Electrochromic/ Winkelmann, F.C. ,

Tavil, Aslihan; Lee, Eleanor S.

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Performance Criteria for Residential Zero Energy Windows  

E-Print Network (OSTI)

neutral energy impact of windows (energy consumption of buildingneutral energy impact of windows (energy consumption of buildingneutral energy impact of windows (energy consumption of building

Arasteh, Dariush; Goudey, Howdy; Huang, Joe; Kohler, Christian; Mitchell, Robin

2006-01-01T23:59:59.000Z

22

A Review of Electrochromic Window Performance Factors  

E-Print Network (OSTI)

ratio of 0.30. The electrochromic windows were controlled toProceedings. A Review of Electrochromic Window Performanceand economic benefits of electrochromic smart windows,"

Selkowitz Ed, S.E.

2010-01-01T23:59:59.000Z

23

Energy Performance Ratings for Windows, Doors, and Skylights | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Performance Ratings for Windows, Doors, and Skylights Energy Performance Ratings for Windows, Doors, and Skylights Energy Performance Ratings for Windows, Doors, and Skylights June 18, 2012 - 9:35am Addthis Before you shop for energy-efficient windows, doors, and skylights, learn about energy performance ratings. | Photo courtesy of iStockphoto.com/JamesBrey. Before you shop for energy-efficient windows, doors, and skylights, learn about energy performance ratings. | Photo courtesy of iStockphoto.com/JamesBrey. What does this mean for me? Energy performance ratings make it easier for you to purchase the window most appropriate for your home's climate and orientation. Using energy performance ratings, you can fine-tune window placement in your home. You can use the energy performance ratings of windows, doors, and skylights

24

Energy Performance Ratings for Windows, Doors, and Skylights | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Performance Ratings for Windows, Doors, and Skylights Energy Performance Ratings for Windows, Doors, and Skylights Energy Performance Ratings for Windows, Doors, and Skylights June 18, 2012 - 9:35am Addthis Before you shop for energy-efficient windows, doors, and skylights, learn about energy performance ratings. | Photo courtesy of iStockphoto.com/JamesBrey. Before you shop for energy-efficient windows, doors, and skylights, learn about energy performance ratings. | Photo courtesy of iStockphoto.com/JamesBrey. What does this mean for me? Energy performance ratings make it easier for you to purchase the window most appropriate for your home's climate and orientation. Using energy performance ratings, you can fine-tune window placement in your home. You can use the energy performance ratings of windows, doors, and skylights

25

Theoretical Predictions and Experimental Assessments of the Performance of Alumina RF Windows  

SciTech Connect

Radio frequency (RF) windows are the most likely place for catastrophic failure to occur in input power couplers for particle accelerators. Reliable RF windows are essential for the success of the Accelerator Production of Tritium (APT) program because there are over 1000 windows on the accelerator, and it takes more than one day to recover from a window failure. The goals of this research are to analytically predict the lifetime of the windows, to develop a conditioning procedure, and to evaluate the performance of the RF windows. The analytical goal is to predict the lifetime of the windows. The probability of failure is predicted by the combination of a finite element model of the window, Weibull probabilistic analysis, and fracture mechanics. The window assembly is modeled in a finite element electromagnetic code in order to calculate the electric fields in the window. The geometry (i.e. mesh) and electric fields are input into a translator program to generate the mesh and boundary conditions for a finite element thermal structural code. The temperatures and stresses are determined in the thermal/structural code. The geometry and thermal structural results are input into another translator program to generate an input file for the reliability code. Material, geometry and service data are also input into the reliability code. To obtain accurate Weibull and fatigue data for the analytical model, four point bend tests were done. The analytical model is validated by comparing the measurements to the calculations. The lifetime of the windows is then determined using the reliability code. The analytical model shows the window has a good thermal mechanical design and that fast fracture is unlikely to occur below a power level of 9 Mw. The experimental goal is to develop a conditioning procedure and evaluate the performance of RF windows. During the experimental evaluation, much was learned about processing of the windows to improve the RF performance. Methods of processing included grit blasting and using various coatings.

Karen Ann Cummings

1998-07-01T23:59:59.000Z

26

Building Technologies Office: High Performance Windows Volume Purchase  

NLE Websites -- All DOE Office Websites (Extended Search)

High Performance Windows Volume Purchase High Performance Windows Volume Purchase DOE's Building Technologies Office (BTO) is coordinating a volume purchase of high performance windows, and low-e storm windows, to expand the market of these high efficiency products. Price is the principal barrier to more widespread market commercialization. The aim of this volume purchase initiative is to work with industry and potential buyers to make highly insulated windows more affordable. Announcement EPA Most Efficient Program for window technology to launched in January 2013. Program Highlights Features Image of person signing document. Volume Purchase RFP Arrow Image of a question mark. Frequently Asked Questions Arrow Image of low-e storm window with two orange-yellow arrows hitting the window and reflecting back inside. Building Envelope and Windows R&D Program Blog Arrow

27

High Performance Windows Volume Purchase: For Light Commercial Buyers  

NLE Websites -- All DOE Office Websites (Extended Search)

For Light For Light Commercial Buyers to someone by E-mail Share High Performance Windows Volume Purchase: For Light Commercial Buyers on Facebook Tweet about High Performance Windows Volume Purchase: For Light Commercial Buyers on Twitter Bookmark High Performance Windows Volume Purchase: For Light Commercial Buyers on Google Bookmark High Performance Windows Volume Purchase: For Light Commercial Buyers on Delicious Rank High Performance Windows Volume Purchase: For Light Commercial Buyers on Digg Find More places to share High Performance Windows Volume Purchase: For Light Commercial Buyers on AddThis.com... Home About For Builders For Residential Buyers For Light Commercial Buyers For Manufacturers For Utilities Information Resources For Light Commercial Buyers Significant energy savings from low-E window technology are possible in the

28

A Review of Electrochromic Window Performance Factors  

E-Print Network (OSTI)

influence the market acceptance of electrochromic windowsfor the eventual market success of electrochromic windows inearly niche market might consist of adding an electrochromic

Selkowitz Ed, S.E.

2010-01-01T23:59:59.000Z

29

High Performance Windows Volume Purchase: For Residential Buyers  

NLE Websites -- All DOE Office Websites (Extended Search)

Residential Buyers to someone by E-mail Residential Buyers to someone by E-mail Share High Performance Windows Volume Purchase: For Residential Buyers on Facebook Tweet about High Performance Windows Volume Purchase: For Residential Buyers on Twitter Bookmark High Performance Windows Volume Purchase: For Residential Buyers on Google Bookmark High Performance Windows Volume Purchase: For Residential Buyers on Delicious Rank High Performance Windows Volume Purchase: For Residential Buyers on Digg Find More places to share High Performance Windows Volume Purchase: For Residential Buyers on AddThis.com... Home About For Builders For Residential Buyers For Light Commercial Buyers For Manufacturers For Utilities Information Resources For Residential Buyers Both home owners and buyers can take advantage of the energy savings from

30

High Performance Windows Volume Purchase: Presentations for Past Events and  

NLE Websites -- All DOE Office Websites (Extended Search)

Presentations for Past Events and Webinars to someone by E-mail Share High Performance Windows Volume Purchase: Presentations for Past Events and Webinars on Facebook Tweet about High Performance Windows Volume Purchase: Presentations for Past Events and Webinars on Twitter Bookmark High Performance Windows Volume Purchase: Presentations for Past Events and Webinars on Google Bookmark High Performance Windows Volume Purchase: Presentations for Past Events and Webinars on Delicious Rank High Performance Windows Volume Purchase: Presentations for Past Events and Webinars on Digg Find More places to share High Performance Windows Volume Purchase: Presentations for Past Events and Webinars on AddThis.com... Home About For Builders For Residential Buyers For Light Commercial Buyers

31

Energy performance of a dual airflow window under different climates  

Science Journals Connector (OSTI)

Ventilated windows have shown great potential in conserving energy in buildings and provide fresh air to improve indoor air quality. This paper reports our effort to use EnergyPlus to simulate the energy performance of a dual airflow window under different climates. Our investigation first developed a network model to account for the two-dimensional heat transfer in the window system and implemented it in EnergyPlus. The two-dimensional assumption and the modified EnergyPlus program were validated by the measured temperatures of the window and the energy demand of a test cell with the window under actual weather conditions. Then EnergyPlus was applied to analyze energy performance of a small apartment installed with the dual airflow windows in five different climate zones in China. The energy used by the apartment with blinds windows and low-e windows was also calculated for comparison. The dual airflow window can reduce heating energy of the apartment, especially in cold climate. The cooling energy reduction by the window was less important than that by shading solar radiation. The dual airflow window is recommended for colder climate. If improving air quality is a major consideration for a building, the window can be used in any climate.

Jingshu Wei; Jianing Zhao; Qingyan Chen

2010-01-01T23:59:59.000Z

32

Window Properties  

NLE Websites -- All DOE Office Websites (Extended Search)

Window Properties: measurements, simulations and ratings Window Properties: measurements, simulations and ratings Determining the thermal and optical performance of window systems is essential to researchers striving to develop improved products and to window manufacturers who need to demonstrate the energy performance of their products to architects, engineers, builders, and the general public. LBNL is involved in basic research in this field, in developing software and test procedures to analyze and quantify window heat transfer and optics, and in developing standards and rating procedures. Infrared Laboratory experiments provide surface temperature maps of window products. A companion Traversing System measures air velocity and air temperatures near the surface of test specimens. The MoWiTT facility provides accurate measurements of the heat flow through complete window systems subjected to real weather conditions. MoWiTT results have been used to validate the performance of emerging technologies and research prototypes as well as to validate thermal performance models.

33

The Impact of Overhang Design on the Performance of Electrochromic Windows  

E-Print Network (OSTI)

Issues for Large-area Electrochromic Windows in CommercialAnalysis of Prototype Electrochromic Windows”, ASHRAEon the Performance of Electrochromic Windows Asilhan Tavil

Tavil, Aslihan; Lee, Eleanor S.

2005-01-01T23:59:59.000Z

34

Performance Criteria for Residential Zero Energy Windows  

E-Print Network (OSTI)

e window energy rovide o ws p wind SHGC U=0.84 Btu/(hr-ft^2-F) [4.77 W/(m^2-K)], SHGC=0.64 - 124.3 MBtu [131.2 GJ] -hr-ft^2-F) [2.78 W/(m^2-K)], SHGC=0.56 - 106.2 MBtu [ 112.0

Arasteh, Dariush; Goudey, Howdy; Huang, Joe; Kohler, Christian; Mitchell, Robin

2006-01-01T23:59:59.000Z

35

Characterization of Energy Savings and Thermal Comfort Improvements Derived from Using Interior Storm Windows  

SciTech Connect

This field study of a single historic home in Seattle, WA documents the performance of Indow Windows’s interior storm window inserts. Energy use and the temperature profile of the house were monitored before and after the installation of the window inserts and changes in the two recorded metrics were examined. Using the defined analysis approach, it was determined that the interior storm windows produced a 22% reduction of the HVAC energy bill and had an undetermined effect on the thermal comfort in the house. Although there was no measurable changes in the thermal comfort of the house, the occupant noted the house to be “warmer in the winter and cooler in the summer” and that the “temperatures are more even (throughout the house).” The interior storm windows were found to be not cost effective, largely due to the retrofits completed on its heating system. However, if the economic analysis was conducted based on the old heating system, a 72% efficient oil fired furnace, the Indow Windows proved to be economical and had a simple payback period of 9.0 years.

Knox, Jake R.; Widder, Sarah H.

2013-09-30T23:59:59.000Z

36

Effects of Overhangs on the Performance of Electrochromic Windows  

NLE Websites -- All DOE Office Websites (Extended Search)

Effects of Overhangs on the Performance of Electrochromic Windows Effects of Overhangs on the Performance of Electrochromic Windows Title Effects of Overhangs on the Performance of Electrochromic Windows Publication Type Journal Article LBNL Report Number LBNL-61137 Year of Publication 2006 Authors Tavil, Aslihan, and Eleanor S. Lee Journal Architectural Science Review Call Number LBNL-61137 Abstract In this study, various facade designs with overhangs combined with electrochromic (EC) window control strategies were modeled for a typical commercial office building in a hot and cold climate using the DOE 2.1E building energy simulation program. EC windows were combined with overhangs since opaque overhangs provide protection from direct sun which EC windows are unable to do alone. The window wall was divided into an upper and lower aperture so that various combinations of overhang position and control strategies could be considered. The overhang was positioned either at the top of the upper window aperture or between the upper and lower apertures. Overhang depth was varied. EC control strategies were fully bleached at all times, modulated based on incident vertical solar radiation limits, or modulated to meet the design work plane illuminance with daylight. Annual total energy use (ATE), peak electric demand (PED), average daylight illuminance (DI), and daylight glare index (DGI) for south-facing private offices were computed and compared to determine which combinations of fa?ade design and control strategies yielded the greatest energy efficiency, daylight amenity, and visual comfort.

37

Modeling Windows in Energy Plus with Simple Performance Indices  

NLE Websites -- All DOE Office Websites (Extended Search)

Modeling Windows in Energy Plus with Simple Performance Indices Modeling Windows in Energy Plus with Simple Performance Indices Title Modeling Windows in Energy Plus with Simple Performance Indices Publication Type Report LBNL Report Number LBNL-2804E Year of Publication 2009 Authors Arasteh, Dariush K., Christian Kohler, and Brent T. Griffith Date Published 10/2009 Call Number LBNL-2804E Abstract The paper describes the development of a model specification for performance monitoring systems for commercial buildings. The specification focuses on four key aspects of performance monitoring: performance metrics measurement system requirements data acquisition and archiving data visualization and reporting The aim is to assist building owners in specifying the extensions to their control systems that are required to provide building operators with the information needed to operate their buildings more efficiently and to provide automated diagnostic tools with the information required to detect and diagnose faults and problems that degrade energy performance.

38

Calculating center-glass performance indices of windows  

SciTech Connect

Building envelope performance is strongly influenced by solar gain and heat transfer through windows. The majority of this energy gain or loss passes through the center-glass area of the glazing system. Various methods have been devised to calculate the corresponding center-glass performance indices. Solar heat gain coefficient (SHGC) and U-factor are the quantities most frequently sought. Hand calculations have given way to computer-based techniques. Computer simulation offers the opportunity to employ more detailed models plus the ability to model the large number of glazing systems made possible by design options, such as low-emissivity or solar-control coatings, selective glass tints, substitute fill gases, and glazing layers, that partially transmit longwave radiation. A new, more accurate method is presented in this paper for manipulating spectral optical data while calculating the energy related optical properties of glazing layers and glazing systems. The use of the same technique to track visible and ultraviolet radiation is also demonstrated. In addition, more refined methods are documented for calculating SHGC and U-factor while accounting for the thermal resistance of individual glazings.

Wright, J.L. [Univ. of Waterloo, Ontario (Canada). Dept. of Mechanical Engineering

1998-10-01T23:59:59.000Z

39

Window performance for human thermal comfort  

E-Print Network (OSTI)

Conference on Environmental Ergonomics, Fukuoka, Japan. 21.Ventilated Spaces”. Ergonomics, 29, 215 - 235. 36. Fanger,and Workload”. Applied Ergonomics, 32, 407 – 417. 54.

Huizenga, C; Zhang, H.; Mattelaer, P.; Yu, T.; Arens, Edward A; Lyons, P.

2006-01-01T23:59:59.000Z

40

Window performance for human thermal comfort  

E-Print Network (OSTI)

with Tsol and SHGC indirect ..of solar transmittance and SHGC 64 Figure 44: Directsolar transmittance and SHGC.64 TABLE OF TABLES Table

Huizenga, C; Zhang, H.; Mattelaer, P.; Yu, T.; Arens, Edward A; Lyons, P.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Window performance for human thermal comfort  

E-Print Network (OSTI)

Review”. Proceedings, Healthy Building, 2000 13. Bohm, M. ,Consumption”. Proceedings, Healthy Building 94 30. Estrada-by a Hot Panel”. Healthy Buildings, Washington DC. Terano,

Huizenga, C; Zhang, H.; Mattelaer, P.; Yu, T.; Arens, Edward A; Lyons, P.

2006-01-01T23:59:59.000Z

42

Monitored Energy Performance of Electrochromic Windows Controlled for  

NLE Websites -- All DOE Office Websites (Extended Search)

Monitored Energy Performance of Electrochromic Windows Controlled for Monitored Energy Performance of Electrochromic Windows Controlled for Daylight and Visual Comfort Title Monitored Energy Performance of Electrochromic Windows Controlled for Daylight and Visual Comfort Publication Type Conference Paper LBNL Report Number LBNL-58912 Year of Publication 2005 Authors Lee, Eleanor S., Dennis L. DiBartolomeo, Joseph H. Klems, Mehry Yazdanian, and Stephen E. Selkowitz Conference Name 2006 ASHRAE Annual Meeting Date Published 06/2006 Conference Location Quebec City, Canada Call Number LBNL-58912 Abstract A 20-month field study was conducted to measure the energy performance of south-facing large-area tungsten-oxide absorptive electrochromic (EC) windows with a broad switching range in a private office setting. The EC windows were controlled by a variety of means to bring in daylight while minimizing window glare. For some cases, a Venetian blind was coupled with the EC window to block direct sun. Some tests also involved dividing the EC window wall into zones where the upper EC zone was controlled to admit daylight while the lower zone was controlled to prevent glare yet permit view. If visual comfort requirements are addressed by EC control and Venetian blinds, a 2-zone EC window configuration provided average daily lighting energy savings of 10-15% compared to the reference case with fully lowered Venetian blinds. Cooling load reductions were 0-3%. If the reference case assumes no daylighting controls, lighting energy savings would be 44-11%. Peak demand reductions due to window cooling load, given a critical demand-response mode, were 19-26% maximum on clear sunny days. Peak demand reductions in lighting energy use were 0% or 72-100% compared to a reference case with and without daylighting controls, respectively. Lighting energy use was found to be very sensitive to how glare and sun is controlled. Additional research should be conducted to fine-tune EC control for visual comfort based on solar conditions so as to increase lighting energy savings.

43

Laboratory Performance Testing of Residential Window Air Conditioners  

SciTech Connect

Window air conditioners are the dominant cooling product for residences, in terms of annual unit sales. They are inexpensive, portable and can be installed by the owner. For this reason, they are an attractive solution for supplemental cooling, for retrofitting air conditioning into a home which lacks ductwork, and for renters. Window air conditioners for sale in the United States are required to meet very modest minimum efficiency standards. Four window air conditioners' performance were tested in the Advanced HVAC Systems Laboratory on NREL's campus in Golden, CO. In order to separate and study the refrigerant system's performance, the unit's internal leakage pathways, the unit's fanforced ventilation, and the leakage around the unit resulting from installation in a window, a series of tests were devised that focused on each aspect of the unit's performance. These tests were designed to develop a detailed performance map to determine whole-house performance in different climates. Even though the test regimen deviated thoroughly from the industry-standard ratings test, the results permit simple calculation of an estimated rating for both capacity and efficiency that would result from a standard ratings test. Using this calculation method, it was found that the three new air conditioners' measured performance was consistent with their ratings. This method also permits calculation of equivalent SEER for the test articles. Performance datasets were developed across a broad range of indoor and outdoor operating conditions, and used them to generate performance maps.

Winkler, J.; Booten, C.; Christensen, D.; Tomerlin, J.

2013-03-01T23:59:59.000Z

44

Energy Performance Analysis of Electrochromic Windows in New York  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Performance Analysis of Electrochromic Windows in New York Energy Performance Analysis of Electrochromic Windows in New York Commercial Office Buildings Title Energy Performance Analysis of Electrochromic Windows in New York Commercial Office Buildings Publication Type Report LBNL Report Number LBNL-50096 Year of Publication 2002 Authors Lee, Eleanor S., L. Zhou, Mehry Yazdanian, Vorapat Inkarojrit, Jonathan L. Slack, Michael D. Rubin, and Stephen E. Selkowitz Call Number LBNL-50096 Abstract A DOE-2.1E energy simulation analysis of a switchable electrochromic (EC) glazing with daylighting controls has been conducted for prototypical office buildings in New York (NY). The modeling included four types of office buildings: old and New vintages and large (10,405 m2, 112,000 ft2) and small (502m2, 5400 ft2) buildings. Five commercially available, base case windows with and without interior shades were modeled. Window area varied from 0 to 60% of the exterior floor-to-floor wall area. The electric lighting had either no controls or continuous daylighting controls. The prototypes were modeled in New York City or Buffalo.

45

Hit the Road, Jack! New Thermal Window Technology Lessens Menace of Jack  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hit the Road, Jack! New Thermal Window Technology Lessens Menace of Hit the Road, Jack! New Thermal Window Technology Lessens Menace of Jack Frost Hit the Road, Jack! New Thermal Window Technology Lessens Menace of Jack Frost January 17, 2012 - 4:25pm Addthis The frost patterns on your window might be pretty, but they're not helping you save any energy. Energy efficient windows provide an effective barrier from inclement weather. | Photo courtesy of Callie Reed. The frost patterns on your window might be pretty, but they're not helping you save any energy. Energy efficient windows provide an effective barrier from inclement weather. | Photo courtesy of Callie Reed. Roland Risser Roland Risser Program Director, Building Technologies Office

46

Thermally induced wave-front distortions in laser windows  

SciTech Connect

A simple analytical expression is given for wave-front distortions and birefringence due to heating in laser windows. (AIP)

Greninger, C.E.

1986-08-01T23:59:59.000Z

47

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

WINDOW 6 and THERM 6 Technical Documentation WINDOW 6 and THERM 6 Technical Documentation Algorithm Documentation WINDOW6 and THERM6 implement the ISO 15099 algorithms: bullet ISO 15099 The algorithms in WINDOW6 and THERM6 follow the procedures presented in ISO 15099: "Thermal performance of windows, doors and shading devices - Detailed calculations." See: http://webstore.ansi.org/ansidocstore/product.asp?sku=ISO+15099%3A2003 In addition to implementing ISO 15099 algorithms in WINDOW6 and THERM6, we have added additional capabilities to WINDOW6. The following reports and papers describe these additional capabilities and/or elaborate on ISO15099. bullet Thermal Algorithm Documentation for THERM6: Conrad 5 & Viewer 5 Technical and Programming Documentation June 20, 2006 bullet Thermal Algorithm Documentation for WINDOW6:

48

Laboratory Performance Testing of Residential Window Mounted Air Conditioners  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Laboratory Performance Testing of Residential Window Mounted Air Conditioners Jon Winkler Chuck Booten Dane Christensen Jeff Tomerlin April 29, 2012 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Why should we care? * Window AC unit sales dominate US market o 7.5 million units sold in 2011 - 36% more than ducted systems - Approx. 30% of installed capacity o Inexpensive relative to central units o Easy installation o Attractive for retrofits * Need accurate models in whole-building tools o Costs/savings relative to other solutions can be quantified o Spot cooling can reduce energy use, but when, where and by

49

Daylighting control performance of a thin-film ceramic electrochromic window: field study results  

E-Print Network (OSTI)

1 Daylighting control performance of a thin-film ceramic electrochromic window: field study results-film electrochromic (EC) windows were initiated at the new full-scale Window Systems testbed facility at the Lawrence of this emerging technology. Keywords: Building energy-efficiency; Electrochromic windows; Daylighting; Control

50

Thermal Performance Benchmarking (Presentation)  

SciTech Connect

This project will benchmark the thermal characteristics of automotive power electronics and electric motor thermal management systems. Recent vehicle systems will be benchmarked to establish baseline metrics, evaluate advantages and disadvantages of different thermal management systems, and identify areas of improvement to advance the state-of-the-art.

Moreno, G.

2014-11-01T23:59:59.000Z

51

Modeling Windows in Energy Plus with Simple Performance Indices  

E-Print Network (OSTI)

that window U-factors include the interior and exterior filmwindows however, Steps 1 and 5 which use interior filmthese film coefficients to a resistance for the solid window

Arasteh, Dariush

2010-01-01T23:59:59.000Z

52

Optical Analysis and Thermal Modeling of a Window for a Small Particle Solar Receiver  

Science Journals Connector (OSTI)

Abstract Concentrated solar power (CSP) systems use heliostats to concentrate solar radiation in order to produce high temperature heat, which drives a turbine to generate electricity. A 5 \\{MWth\\} Small Particle Solar Receiver is being developed for power tower CSP plants based on volumetric absorption by a gas-particle suspension by the support from the U.S. Department of Energy under the SunShot Initiative. The radiation enters the pressurized receiver (0.5 MPa) through a curved window, which must sustain the thermal loads from the concentrated solar flux and infrared reradiation from inside the receiver. The thermal load from the solar flux on the window is calculated by using the computer code MIRVAL from Sandia National Laboratory which uses the Monte Carlo Ray Trace (MCRT) method, along with two other codes developed by the authors. Thermal loading was calculated from energy absorbed at various points throughout the window from both the heliostat field and inside the receiver. Transmission and reflective losses were also calculated for different window materials in order to find out how much radiation will enter the receiver or will be lost. The three dimensional temperature distribution of the window is analyzed by an energy balance taking into account spectral volumetric absorption, spectral surface emission, conduction within the window, and convection from both surfaces. A maximum window temperature of 800 °C must be enforced to prevent cracking and/or devitrification due to overheating. Several grades of quartz are considered for this study with detailed spectral calculations. For a chosen material, the window temperature was found to be held under 800 °C. The results showed that most of the heat load on the window comes from the inside of receiver due to spectral variation.

A.M. Mecit; F.J. Miller; A. Whitmore

2014-01-01T23:59:59.000Z

53

Performance Testing of Window Installation and Flashing Details  

E-Print Network (OSTI)

Protection of interface at windows and other penetrations from rainwater intrusion is a primary need of building structures. This is especially true when the building is in a high weather exposure location or in a climate in which the ability...

Weston, T. A.; Herrin, J.

2002-01-01T23:59:59.000Z

54

Power Electronic Thermal System Performance and Integration ...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Power Electronic Thermal System Performance and Integration Power Electronic Thermal System Performance and Integration 2009 DOE Hydrogen Program and Vehicle Technologies Program...

55

The Impact of Overhang Designs on the Performance of Electrochromic Windows  

NLE Websites -- All DOE Office Websites (Extended Search)

The Impact of Overhang Designs on the Performance of Electrochromic Windows The Impact of Overhang Designs on the Performance of Electrochromic Windows Title The Impact of Overhang Designs on the Performance of Electrochromic Windows Publication Type Conference Paper LBNL Report Number LBNL-57020 Year of Publication 2005 Authors Tavil, Aslihan, and Eleanor S. Lee Conference Name ISES 2005 Solar World Congress Date Published 08/2005 Conference Location Orlando, FL Call Number LBNL-57020 Abstract In this study, various facade designs with overhangs combined with electrochromic window control strategies were modeled with a prototypical commercial office building in a hot and cold climate using the DOE 2.1E building energy simulation program. Annual total energy use (ATE), peak electric demand (PED), average daylight illuminance (DI), and daylight glare index (DGI) were computed and compared to determine which combinations of fa?ade design and control strategies yielded the greatest energy efficiency, daylight amenity, and visual comfort.

56

Zero Energy Windows  

E-Print Network (OSTI)

Energy Performance of Electrochromic Windows Controlled for2006). Advancement of Electrochromic Windows, CaliforniaSavings Potential of Electrochromic Windows in the U.S.

Arasteh, Dariush; Selkowitz, Steve; Apte, Josh; LaFrance, Marc

2006-01-01T23:59:59.000Z

57

NREL Solves Residential Window Air Conditioner Performance Limitations (Fact Sheet)  

SciTech Connect

Comprehensive performance tests lead to enhanced modeling capability and affordable methods to increase energy efficiency.

Not Available

2013-05-01T23:59:59.000Z

58

To be submitted to Solar Energy. Daylight performance of a microstructured prismatic window film in deep open  

E-Print Network (OSTI)

To be submitted to Solar Energy. Daylight performance of a microstructured prismatic window film Systems Department, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory with vertical windows have the potential to offset lighting energy use in deep perimeter zones

59

Pennsylvania: Window Technology First of Its Kind for Commercial Buildings  

Energy.gov (U.S. Department of Energy (DOE))

The Opti Ultra Thermal Window series introduces new high-performing windows to the commercial building industry and unlocks the potential to save energy in more of America's commercial building space.

60

Windows NT 4.0 Asynchronous Transfer Mode network interface card performance  

SciTech Connect

Windows NT desktop and server systems are becoming increasingly important to Sandia. These systems are capable of network performance considerably in excess of the 10 Mbps Ethernet data rate. As alternatives to conventional Ethernet, 155 Mbps Asynchronous Transfer Mode, ATM, and 100 Mbps Ethernet network interface cards were tested and compared to conventional 10 Mbps Ethernet cards in a typical Windows NT system. The results of the tests were analyzed and compared to show the advantages of the alternative technologies. Both 155 Mbps ATM and 100 Mbps Ethernet offer significant performance improvements over conventional 10 Mbps shared media Ethernet.

Tolendino, L.F. [Sandia National Labs., Albuquerque, NM (United States). Advanced Networking Integration Dept.

1997-02-18T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Window Replacement, Rehabilitation, & Repair Guides- Building America Top Innovation  

Energy.gov (U.S. Department of Energy (DOE))

Building America team Building Science Corporation guides contractors through several options for repairing or replacing old windows to improve air sealing and thermal performance.

62

Monitored Energy Performance of Electrochromic Windows Controlled for Daylight and Visual Comfort  

E-Print Network (OSTI)

absorptive electrochromic (EC) windows tested were market-electrochromic windows that were deemed sufficiently mature for market

Lee, Eleanor S.; DiBartolomeo, Dennis L.; Klems, Joseph; Yazdanian, Mehry; Selkowitz, Stephen E.

2005-01-01T23:59:59.000Z

63

Monitored Energy Performance of Electrochromic Windows Controlled for Daylight and Visual Comfort  

E-Print Network (OSTI)

Subject responses to electrochromic windows. Submitted toin a full-scale electrochromic window testbed. Technicaloptimization of electrochromic operations for occupant

Lee, Eleanor S.; DiBartolomeo, Dennis L.; Klems, Joseph; Yazdanian, Mehry; Selkowitz, Stephen E.

2005-01-01T23:59:59.000Z

64

Field Evaluation of Windows  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluation of Windows Evaluation of Windows Last Updated: 10/20/2009 Various tools can be used to evaluate windows in the field. Unless a new window still has the NFRC label attached to it, it is nearly impossible to determine by sight what the thermal and optical performance of a window is. These tools can provide information, such as low-e coating, gap width and gas fill, that can be used to approximate the performance of a window. Solar gain and Low-e detector This device can be used to determine if a low-e coating is present in the window, what type of coating it is, and where it is located. The type of low-e coating will indicate the amount of solar gain that is admitted through the coating. Readings can be "low", "medium" or "high". The device will also indicate on which glass surface the low-e coating is in relation to the position of the device. Limitations: Only works on glass of 1/8" (3 mm) or thinner. Cost: around $350 from EDTM.com

65

Urban solarium : thermal performance in Boston  

E-Print Network (OSTI)

This thesis addresses the issue of energy efficiency through the lens of thermal performance in the context of urban housing in the city of Boston. Located in the historic brick row house neighborhood of the South End, the ...

Hsu, Juliet Chia-Wen

2012-01-01T23:59:59.000Z

66

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Window Technologies Window Technologies Operator Types Traditional operable window types include the projected or hinged types such as casement, awning, and hopper, and the sliding types such as double- and single-hung and horizontal sliding. This section on Operator Types describes how these typical windows work. Operator Types Glazing Types Traditionally, windows have been made from clear glass, but advanced technologies have significantly improved the thermal performance of glass. This section on Glazing Types describes some of these technologies. Glazing Types Gas Fills Gas fills improve the thermal performance of insulating glazing units by reducing the conductance of the air space between the layers. This section on Gas Fills describes the thermal performance benefits of adding gas to an IGU.

67

Advancement of Electrochromic Windows  

E-Print Network (OSTI)

Guide for Early-Market Electrochromic Windows. LBNL-59950.Granqvist, C.G. 2000. "Electrochromic Tungsten Oxide Films:the performance of the electrochromic windows. Proceedings

2006-01-01T23:59:59.000Z

68

Building Energy Software Tools Directory: Window  

NLE Websites -- All DOE Office Websites (Extended Search)

Window Window WINDOW screenshot. Calculates thermal performance of fenestration products; heat transfer analysis method consistent with the rating procedure developed by the National Fenestration Rating Council (NFRC). Screen Shots Keywords fenestration, thermal performance, solar optical characteristics, windows, glazing Validation/Testing N/A Expertise Required Some knowledge about windows. Users 2000+ in the U.S. and abroad. Audience Manufacturers, engineers, architects, researchers, sales personnel. Input Interactive program: user-provided data files for frames (from the THERM program) and glazing layers (from the Optics program) optional. Output Reports for the total window can be saved to disk or printed; files can be generated to be used as input to the DOE-2 and EnergyPlus programs;

69

A High Performance Computing Platform for Performing High-Volume Studies With Windows-based Power Grid Tools  

SciTech Connect

Serial Windows-based programs are widely used in power utilities. For applications that require high volume simulations, the single CPU runtime can be on the order of days or weeks. The lengthy runtime, along with the availability of low cost hardware, is leading utilities to seriously consider High Performance Computing (HPC) techniques. However, the vast majority of the HPC computers are still Linux-based and many HPC applications have been custom developed external to the core simulation engine without consideration for ease of use. This has created a technical gap for applying HPC-based tools to today’s power grid studies. To fill this gap and accelerate the acceptance and adoption of HPC for power grid applications, this paper presents a prototype of generic HPC platform for running Windows-based power grid programs on Linux-based HPC environment. The preliminary results show that the runtime can be reduced from weeks to hours to improve work efficiency.

Chen, Yousu; Huang, Zhenyu

2014-08-31T23:59:59.000Z

70

Pennsylvania: New Series of Windows Has Potential to Save Energy for Commercial Buildings  

Energy.gov (U.S. Department of Energy (DOE))

The OptiQ™ Ultra Thermal Window series introduces new high-performing windows to the commercial building industry and unlocks the potential to save energy in more of America’s commercial building space.

71

Dish Stirling High Performance Thermal Storage | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Stirling High Performance Thermal Storage Dish Stirling High Performance Thermal Storage This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program...

72

The Impact of Overhang Design on the Performance of Electrochromic Windows  

E-Print Network (OSTI)

in Fig. 1. TABLE 1 PROPERTIES OF EC WINDOWS U ov. U COG SHGCov SHGC COG Tv ov Tv COG located 3.05 m from the windowEC COG: Center-of-glass; SHGC: Solar heat gain coefficient;

Tavil, Aslihan; Lee, Eleanor S.

2005-01-01T23:59:59.000Z

73

Field Evaluation of Low-E Storm Windows  

NLE Websites -- All DOE Office Websites (Extended Search)

Field Evaluation of Low-E Storm Windows Field Evaluation of Low-E Storm Windows Title Field Evaluation of Low-E Storm Windows Publication Type Conference Paper LBNL Report Number LBNL-1940E Year of Publication 2007 Authors S. Craig Drumheller, Christian Kohler, and Stefanie Minen Conference Name Thermal Performance of the Exterior Envelopes of Whole Buildings X International Conference Volume 277 Date Published 12/2007 Conference Location Clearwater Beach, FL Abstract A field evaluation comparing the performance of low emittance (low-e) storm windows with both standard clear storm windows and no storm windows was performed in a cold climate. Six homes with single pane windows were monitored over the period of one heating season. The homes were monitored with no storm windows and with new storm windows. The storm windows installed on four of the six homes included a hard coat, pyrolitic, low-e coating while the storm windows for the other two homes had traditional clear glass. Overall heating load reduction due to the storm windows was 13% with the clear glass and 21% with the low-e windows. Simple paybacks for the addition of the storm windows were 10 years for the clear glass and 4.5 years for the low-e storm windows.

74

Modeling of fixed bed methanation reactor for syngas production: Operating window and performance characteristics  

Science Journals Connector (OSTI)

Abstract The present work focuses on the development of phenomenological model for the bio-syngas to methane conversion process. One dimensional heterogeneous and pseudo-homogeneous model were simulated for a typical pilot plant scale fixed bed methanator processing 55 mol/h of CO (total molar flow rate of 310 mol/h) with inlet composition of H2/CO = 3, CO2/CO = 1, CH4/CO = 0.5 at 550 K and 1 atm. Performance of the fixed bed reactor at different operating conditions like CO2/CO ratio, H2/CO ratio, effect of H2O in the feed was studied. It was found that for feeds that were not pre-enriched with hydrogen, presence of water and water gas shift activity was found to decrease the catalyst inventory substantially. CO2 in the inlet feed stream would help to decrease the temperature due to dilution effect and more importantly, can be chosen to maximize methane yield per mole of CO converted. Further, the model was simulated to predict the performance characteristics of reactor with a mixture containing two types of catalyst, one of them being specifically added to increase H2/CO ratio in feed through water gas shift reaction. The work also laid the importance of incorporating pore diffusion and external mass transfer locally in the computation of actual catalyst inventory and reactor volume. The work was useful in selection of operating window and assessing the various viable options for an industrial reactor. The model developed will serve in selection of operability window for commercialization of substitute natural gas synthesis (SNG) process.

Naren Rajan Parlikkad; Stéphane Chambrey; Pascal Fongarland; Nouria Fatah; Andrei Khodakov; Sandra Capela; Olivier Guerrini

2013-01-01T23:59:59.000Z

75

Highly Insulating Windows - Fram  

NLE Websites -- All DOE Office Websites (Extended Search)

Frames Frames Research performed at the Norwegian University of Science and Technology and LBNL has identified various highly insulating frame solutions. A report was released in 2007 describing some of these frames. This document reports the findings of a market and research review related to state-of-the-art highly insulating window frames. The market review focuses on window frames that satisfy the Passivhaus requirements (window U-value less or equal to 0.8 W/m2K ), while other examples are also given in order to show the variety of materials and solutions that may be used for constructing window frames with a low thermal transmittance (U-value). The market search shows that several combinations of materials are used in order to obtain window frames with a low U-value. The most common insulating material seems to be Polyurethane (PUR), which is used together with most of the common structural materials such as wood, aluminum, and PVC.

76

Power Electronic Thermal System Performance and Integration ...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

More Documents & Publications Motor Thermal Control Thermal Stress and Reliability for Advanced Power Electronics and Electric Machines Integrated Vehicle Thermal Management...

77

Implementations of the Integrated Linux, Windows and Macintosh Cluster for achieving the Personal High Performance Computing  

E-Print Network (OSTI)

SUMMARY The motivation and objective for this paper is to demonstrate (1) the integrated Linux (30 distributions, including Red Hat and SUSE), Windows (Cluster 2003 and Server 2003) and Macintosh (Tiger 10.4) cluster for running Web Services and jobs; and (2) the demonstration of the Personal High Performance Computing (PHPC), which only require a smaller number of computers, resources and space in the secure Gigabytes of 1,000 Mps and Wi-Fi/3G of 108 Mbps networking environments. This PHPC is based on a cluster of the 32-bit and 64-bit AMD and Intel dualcore machines, which can achieve the following: (a) jobs are shared amongst different platforms, which can run as a single job altogether or run different jobs concurrently; (b) running Java and.NET Web Services; (c) receiving up to a 60 % better performance referring to multi-tasking performance; (e) ensuring a secure networking environment, which includes VPN, in-build firewall and integrated wired and wireless networks; (f) storing a massive amount of data (12 TB, or 12,000 GB) for database and server applications; and (g) successfully integrating with other technologies such as the integrated Java and.NET Web Services,

Victor Chang

78

Energy performance of a dual airflow window under different climates Jingshu Wei1  

E-Print Network (OSTI)

great po tential in conserving energy in buildings and provide fresh air to improve indoor air qua lity that by shading solar radiation. The dual airflow window is recomm ended for colder climate. If improving air airflow window; Energy demand; Indoor air quality; Different climates 1. Introduction Energy dem

Chen, Qingyan "Yan"

79

Window Types | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Window Types Window Types Window Types June 18, 2012 - 8:06am Addthis A wood-frame window with insulated window glazing. | Photo courtesy of ©iStockphoto/chandlerphoto A wood-frame window with insulated window glazing. | Photo courtesy of ©iStockphoto/chandlerphoto What does this mean for me? If you have old windows, they are likely losing large amounts of energy through the frames and glazing. By upgrading old windows, you can reduce heating and cooling costs in your home. Windows come in a number of different frame and glazing types. By combining an energy-efficient frame choice with a glazing type tailored to your climate and application, you can customize each of your home's windows. Types of Window Frames Improving the thermal resistance of the frame can contribute to a window's

80

Window Types | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Window Types Window Types Window Types June 18, 2012 - 8:06am Addthis A wood-frame window with insulated window glazing. | Photo courtesy of ©iStockphoto/chandlerphoto A wood-frame window with insulated window glazing. | Photo courtesy of ©iStockphoto/chandlerphoto What does this mean for me? If you have old windows, they are likely losing large amounts of energy through the frames and glazing. By upgrading old windows, you can reduce heating and cooling costs in your home. Windows come in a number of different frame and glazing types. By combining an energy-efficient frame choice with a glazing type tailored to your climate and application, you can customize each of your home's windows. Types of Window Frames Improving the thermal resistance of the frame can contribute to a window's

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Multifunctional Nanoclay Hybrids of High Toughness, Thermal, and Barrier Performances  

Science Journals Connector (OSTI)

Multifunctional Nanoclay Hybrids of High Toughness, Thermal, and Barrier Performances ... functionalization of nanofillers, nanoclays or other compds. ...

Houssine Sehaqui; Joby Kochumalayil; Andong Liu; Tanja Zimmermann; Lars A. Berglund

2013-07-09T23:59:59.000Z

82

Are window energy performance selection requirements in line with product design in heating-dominated climates?  

SciTech Connect

This paper discusses energy efficiency criteria for selecting windows and the limitations imposed by the necessity of a factory rating number as opposed to using specific design criteria for each house window. The Canadian annual energy rating (ER) system for residential windows that was derived for use in a cold climate where passive solar gains are significant is described. Corrections are noted to account for specific house differences and for cooling situations. The conclusion is that a rating system must account accurately for solar gain since passive solar is important in this climate. Adoption of the rating system has led to improvements in window design and fabrication beyond simply incorporating low-e glass and argon in sealed double units. Examples are given to illustrate substantially higher ER numbers obtained through improvements that impact on both overall U-factor and solar heat gain coefficient (SHGC).

Henry, R.; Dubrous, F. [Natural Resources Canada, Ottawa, Ontario (Canada)

1998-12-31T23:59:59.000Z

83

High Performance Thermal Interface Technology Overview  

E-Print Network (OSTI)

An overview on recent developments in thermal interfaces is given with a focus on a novel thermal interface technology that allows the formation of 2-3 times thinner bondlines with strongly improved thermal properties at lower assembly pressures. This is achieved using nested hierarchical surface channels to control the particle stacking with highly particle-filled materials. Reliability testing with thermal cycling has also demonstrated a decrease in thermal resistance after extended times with longer overall lifetime compared to a flat interface.

R. Linderman; T. Brunschwiler; B. Smith; B. Michel

2008-01-07T23:59:59.000Z

84

High Performance Thermal Interface Technology Overview  

E-Print Network (OSTI)

An overview on recent developments in thermal interfaces is given with a focus on a novel thermal interface technology that allows the formation of 2-3 times thinner bondlines with strongly improved thermal properties at lower assembly pressures. This is achieved using nested hierarchical surface channels to control the particle stacking with highly particle-filled materials. Reliability testing with thermal cycling has also demonstrated a decrease in thermal resistance after extended times with longer overall lifetime compared to a flat interface.

Linderman, R; Smith, B; Michel, B

2008-01-01T23:59:59.000Z

85

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Welcome to the Efficient Windows Collaborative Welcome to the Efficient Windows Collaborative YOUR GATEWAY TO INFORMATION ON HOW TO CHOOSE ENERGY-EFFICIENT RESIDENTIAL WINDOWS 101 Efficient Windows Collaborative (EWC) members have made a commitment to manufacture and promote energy-efficient windows. This site provides unbiased information on the benefits of energy-efficient windows, descriptions of how they work, and recommendations for their selection and use. Selecting Windows for New Construction Window Selection Tool Selection Process Design Guidance Installation Selecting Replacement Windows Window Selection Tool Assessing Replacement Options Selection Process Design Guidance Installation Understanding Windows Benefits of Energy Efficient Windows Design Considerations How to Measure Performance Window Technologies

86

Database of Low-e Storm Window Energy Performance across U.S. Climate Zones  

SciTech Connect

This is an update of a report that describes process, assumptions, and modeling results produced Create a Database of U.S. Climate-Based Analysis for Low-E Storm Windows. The scope of the overall effort is to develop a database of energy savings and cost effectiveness of low-E storm windows in residential homes across a broad range of U.S. climates using the National Energy Audit Tool (NEAT) and RESFEN model calculations. This report includes a summary of the results, NEAT and RESFEN background, methodology, and input assumptions, and an appendix with detailed results and assumptions by cliamte zone.

Culp, Thomas D.; Cort, Katherine A.

2014-09-04T23:59:59.000Z

87

window.xp  

NLE Websites -- All DOE Office Websites (Extended Search)

New New in Building Energy Efficiency Selecting Windows for Energy Efficiency New window technologies have increased energy benefits and comfort, and have provided more practical options for consumers. This selection guide will help homeowners, architects, and builders take advantage of the expanding window market. The guide contains three sections: an explanation of energy-related window characteristics, a discussion of window energy performance ratings, and a convenient checklist for window selection. S electing the right window for a specific home invariably requires tradeoffs between dif- ferent energy performance features, and with other non-energy issues. An understanding of some basic energy concepts is therefore essential to choosing appropriate windows and skylights. As illustrated on the fol-

88

Thermal Performance Impacts of Center-of-Glass Deflections in Installed  

NLE Websites -- All DOE Office Websites (Extended Search)

Thermal Performance Impacts of Center-of-Glass Deflections in Installed Thermal Performance Impacts of Center-of-Glass Deflections in Installed Insulating Glazing Units Title Thermal Performance Impacts of Center-of-Glass Deflections in Installed Insulating Glazing Units Publication Type Journal Article LBNL Report Number LBNL-5800E Year of Publication 2012 Authors Hart, Robert, Howdy Goudey, Dariush K. Arasteh, and Dragan C. Curcija Journal Energy and Buildings Volume 54 Issue November 2012 Pagination 453-460 Date Published 11/2012 Keywords concave, convex, deflection, field test, gap, insulating glass unit, thermal performance, thermal transmittance, u-factor Abstract This study examines the thermal performance impact of center-of-glass (COG) deflections in double- and triple-pane insulating glass units (IGUs) installed at several locations throughout the US. Deflection was measured during summer and winter temperatures; the results show that outdoor temperature variations can be represented a linear change in COG gap width in double- and triple-pane IGUs within the temperature ranges measured. However, the summer-winter temperature-induced deflection is similar in magnitude to the observed spread in COG deflection of similar units at the same temperature, which suggests that factors other than temperature are of equal importance in determining the in-situ deflection of windows. The effect of deflection on thermal performance depends on the IGU's designed gap. Units constructed with smaller-than-optimal gaps often exhibit significant U-factor change due to temperature-induced reduction in gap width. This effect is particularly problematic in high-performance triple glazing where small gap dimension changes can have a large impact on performance.

89

Lighting energy savings potential of split-pane electrochromic windows controlled for daylighting with visual comfort  

E-Print Network (OSTI)

Energy Performance of Electrochromic Windows Controlled forenergy performance of electrochromic windows. Proceedingssignal for daylight (electrochromic window, no overhang).

Fernandes, Luis

2014-01-01T23:59:59.000Z

90

Performance evaluation of thermal energy storage systems;.  

E-Print Network (OSTI)

??Solar thermal technologies are promising, given the fact that solar newlineenergy is the cheapest and most widely available of all renewable energy newlinetechnologies. The recent… (more)

Ramana A S

2014-01-01T23:59:59.000Z

91

Thermal Performance of a Double-Tube Type Lng Vaporizer  

Science Journals Connector (OSTI)

This report concerns the confirmed test results and method of analysis of the thermal performance of a double-tube type LNG vaporizer (DTV). The DTV is a...

Y. Miyata; T. Miura; S. Kasahara; H. Shohtani…

1994-01-01T23:59:59.000Z

92

Power Electronic Thermal System Performance and Integration (Presentation)  

SciTech Connect

This presentation gives an overview of the status and FY09 accomplishments for the NREL Power Electronic Thermal System Performance and Integration Project.

Bennion, K.

2009-05-01T23:59:59.000Z

93

Effect of nanofluids on thermal performance of heat pipes.  

E-Print Network (OSTI)

?? A relatively new way for utilizing the thermal performance of heat pipes is to use nanofluids as working fluids in the heat pipes. Heat… (more)

Ferizaj, Drilon

2014-01-01T23:59:59.000Z

94

Windows, Doors, & Skylights | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Windows, Doors, & Skylights Windows, Doors, & Skylights Windows, Doors, & Skylights Windows affect home aesthetics as well as energy use. Learn more about energy-efficient windows. Windows affect home aesthetics as well as energy use. Learn more about energy-efficient windows. Energy-efficient windows, doors, and skylights-also known as fenestration-can help lower a home's heating, cooling, and lighting costs. Learn about the energy performance ratings to consider when selecting windows, doors, and skylights, and how to maximize their energy efficiency in your home. Featured Window Types A wood-frame window with insulated window glazing. | Photo courtesy of ©iStockphoto/chandlerphoto

95

NREL Solves Residential Window Air Conditioner Performance Limitations (Fact Sheet), Highlights in Research & Development, NREL (National Renewable Energy Laboratory)  

NLE Websites -- All DOE Office Websites (Extended Search)

13 Denver West Parkway 13 Denver West Parkway Golden, CO 80401 303-275-3000 | www.nrel.gov Printed with a renewable-source ink on paper containing at least 50% wastepaper, including 10% post consumer waste. NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Comprehensive performance tests lead to enhanced modeling capability and affordable methods to increase energy efficiency. Window air conditioners are inexpensive, portable, and can be installed by home occupants, making them a good solution for supplemental cooling, for installing air conditioning into homes that lack ductwork, and for renters. As a result, 7.5 million window air conditioners are purchased each year in the United States-more than all other home cooling equipment

96

Thin Metal Oxide Films to Modify a Window Layer in CdTe-Based Solar Cells for Improved Performance  

SciTech Connect

We report on CdS/CdTe photovoltaic devices that contain a thin Ta2O5 film deposited onto the CdS window layer by sputtering. We show that for thicknesses below 5 nm, Ta2O5 films between CdS and CdTe positively affect the solar cell performance, improving JSC, VOC, and the cell power conversion efficiency despite the insulating nature of the interlayer material. Using the Ta2O5 interlayer, a VOC gain of over 100 mV was demonstrated compared to a CdTe/CdS baseline. Application of a 1nm Ta2O5 interlayer enabled the fabrication of CdTe solar cells with extremely thin (less than 30 nm) CdS window layers. The efficiency of these cells exceeded that of a base line cell with 95 nm of CdS.

Lemmon, John P.; Polikarpov, Evgueni; Bennett, Wendy D.; Kovarik, Libor

2012-05-05T23:59:59.000Z

97

Advanced Windows Test Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

Exterior of Advanced Windows Test Facility Exterior of Advanced Windows Test Facility Advanced Windows Test Facility This multi-room laboratory's purpose is to test the performance and properties of advanced windows and window systems such as electrochromic windows, and automatically controlled shutters and blinds. The lab simulates real-world office spaces. Embedded instrumentation throughout the lab records solar gains and losses for specified time periods, weather conditions, energy use, and human comfort indicators. Electrochromic glazings promise to be a major advance in energy-efficient window technology, helping to achieve the goal of transforming windows and skylights from an energy liability in buildings to an energy source. The glazing can be reversibly switched from a clear to a transparent, colored

98

Cost and performance analysis of concentrating solar power systems with integrated latent thermal energy storage  

Science Journals Connector (OSTI)

Abstract Integrating TES (thermal energy storage) in a CSP (concentrating solar power) plant allows for continuous operation even during times when solar irradiation is not available, thus providing a reliable output to the grid. In the present study, the cost and performance models of an EPCM-TES (encapsulated phase change material thermal energy storage) system and HP-TES (latent thermal storage system with embedded heat pipes) are integrated with a CSP power tower system model utilizing Rankine and s-CO2 (supercritical carbon-dioxide) power conversion cycles, to investigate the dynamic TES-integrated plant performance. The influence of design parameters of the storage system on the performance of a 200 MWe capacity power tower CSP plant is studied to establish design envelopes that satisfy the U.S. Department of Energy SunShot Initiative requirements, which include a round-trip annualized exergetic efficiency greater than 95%, storage cost less than $15/kWht and LCE (levelized cost of electricity) less than 6 ¢/kWh. From the design windows, optimum designs of the storage system based on minimum LCE, maximum exergetic efficiency, and maximum capacity factor are reported and compared with the results of two-tank molten salt storage system. Overall, the study presents the first effort to construct and analyze LTES (latent thermal energy storage) integrated CSP plant performance that can help assess the impact, cost and performance of LTES systems on power generation from molten salt power tower CSP plant.

K. Nithyanandam; R. Pitchumani

2014-01-01T23:59:59.000Z

99

Tips: Windows | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Windows Windows Tips: Windows June 18, 2012 - 9:43am Addthis Tips: Windows Windows can be one of your home's most attractive features. Windows provide views, daylighting, ventilation, and heat from the sun in the winter. Unfortunately, they can also account for 10% to 25% of your heating bill by letting heat out. During the summer, your air conditioner must work harder to cool hot air from sunny windows. Install ENERGY STAR®-qualified windows and use curtains and shade to give your air conditioner and energy bill a break. If your home has single-pane windows, consider replacing them with double-pane windows with high-performance glass-low-e or spectrally selective coatings. In colder climates, select gas-filled windows with low-e coatings to reduce heat loss. In warmer climates, select windows with

100

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Tools Tools Looking for windows for a new home? Use the Window Selection Tool to compare annual energy performance for windows in new construction. Window Selection Tool Looking for replacement windows? Use the Window Selection Tool to compare annual energy performance for replacement windows. Window Selection Tool Window Selection Tool Use the Window Selection Tool for new or replacement windows to compare the annual energy performance of different window types and design conditions for a typical house. Find manufacturers who offer windows and skylights within the generic results shown. Learn more about manufacturers' specific product options. Use the Window Selection Tool to: Compare how various window or skylight types affect estimated energy cost for a typical house in your location.

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Highly Insulating Window Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Window Technology Window Technology Temperature differentials across a window, particularly with cold exterior environments in residential buildings, can lead to significant energy losses. Currently available low-emissivity coatings, gas-fills, and insulating frames provide significant energy savings over typical single or double glazed products. The EWC website provides information on how double glazed low-e gas-filled windows work as well as information on commercially available superwindows (three layer, multiple low-e coatings, high performance gas-fills). The next generation of highly insulating window systems will benefit from incremental improvements being made to current components (i.e. more insulating spacers and frame materials/designs, low-e coatings with improved performance properties). LBNL uses its experimental facilities and software tools to collaborate with window and glass industry representatives to better understand the impacts of new components on overall product performance.

102

Electrochromic windows for commercial buildings: Monitored results from a full-scale testbed  

E-Print Network (OSTI)

lifetime prediction of electrochromic windows for buildingsenergy performance of electrochromic windows. ” Proceedingsin the Proceedings. Electrochromic Windows for Commercial

Lee, Eleanor S.; DiBartolomeo, Dennis L.; Selkowitz, Stephen E.

2000-01-01T23:59:59.000Z

103

Windows and Daylighting  

NLE Websites -- All DOE Office Websites (Extended Search)

Office building exterior Office building exterior Windows and Daylighting Windows research is aimed at improving energy efficiency in buildings and homes across the nation. Research includes: New glazing materials Windows simulation software Advanced high-performance fenestration systems Daylighting technologies Measurement of window properties Windows performance in residential and commercial buildings. Contacts Stephen Selkowitz SESelkowitz@lbl.gov (510) 486-5064 Eleanor Lee ESLee@lbl.gov (510) 486-4997 Charlie Curcija DCCurcija@lbl.gov (510) 495-2602 Links Windows and Daylighting Daylighting the New York Times Headquarters Building Batteries and Fuel Cells Buildings Energy Efficiency Applications Commercial Buildings Cool Roofs and Heat Islands Demand Response Energy Efficiency Program and Market Trends

104

ALSEP Thermal Performance at Off-Equator Latitudes  

E-Print Network (OSTI)

study was authorized under BxA CCP' s 216 and 229 to Contract 9-5829. /UPrepared by: ~~ :P CONFIGURATION 33 THERMAL ANALYSIS 35 4. 1 SOLAR HEATING OF CENTRAL STATION ENCLOSURE AT LUNAR NOON 35 4.2 SOLAR.6 EFFECT OF OFF-EQUATOR DEPLOYMENT ON PDM PANEL 58 REFERENCES 59 #12;: : t ~ ALSEP Thermal Performance

Rathbun, Julie A.

105

Thermal simulation of batteries for improving E-powertrain performance  

Science Journals Connector (OSTI)

The electrical energy is stored, for example, in battery systems with voltages of between 12 V ... a simulation tool, 3D-Electrical / 3D-Thermal Co-Simulation for improving electric powertrain performance.

Dipl.-Ing. Michael Clauss; Jakob Hennig; Dr. Carolus Grünig…

2014-10-01T23:59:59.000Z

106

Transient Thermal Performance of the Stirling Engine Wire Regenerator  

Science Journals Connector (OSTI)

8 January 1994 research-article Transient Thermal Performance of the Stirling Engine Wire Regenerator Allan J. Organ Analyses of the classic Hausen type are not merely inappropriate to conditions in the Stirling...

1994-01-01T23:59:59.000Z

107

A Design Guide for Early-Market Electrochromic Windows  

E-Print Network (OSTI)

Office worker preferences of electrochromic windows: a pilotDetails for an Electrochromic Window Wall Attached arethe performance of the electrochromic windows. Proceedings

2006-01-01T23:59:59.000Z

108

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Replacement Windows for Existing Homes Homes Replacement Windows for Existing Homes Homes Window Selection Tool Use the Window Selection Tool for existing homes (replacement windows) to compare performance of 20 different window types in your location. The Window Selection Tool will take you through a series of design conditions pertaining to your design and location. It is a step-by-step decision-making tool to help determine the most energy efficient window for your house. Window Selection Tool Assessing Options This section provides guidance the options available to improve the performance of your existing windows or to replace them. You can assess whether to repair, retrofit or replace your existing windows. Window Selection Process This section provides step-by-step guidance on the window selection process for replacement windows including issues of code, energy, durability, and installation.

109

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Selection Process for Replacement Windows Selection Process for Replacement Windows What are the benefits of energy-efficient windows? Energy & Cost Savings Improved Comfort Less Condensation Increased Light & View Reduced Fading Lower HVAC Costs How is window performance measured? U-factor Solar Heat Gain Coefficient Visible Transmittance Air Leakage Condensation Resistance Are there financing and incentive programs? Overview of Utility and State Programs Building Codes Energy Rating Programs 1. Assess Your Existing Windows Assess whether your windows should be repaired, retrofitted, or replaced. While most new windows have labels indicating their energy properties, such information is not often available for existing windows. Download Window Energy Efficiency Checklist for assistance. Window Replacement

110

A comparison between conventional hotothermal frequency scan and the lock-in rate window method in measuring thermal diffirsivity  

E-Print Network (OSTI)

that for thick materials with long thermal transport times across the sample where low-frequency measurements to measure thermal conductivity of materials by steady-state heat flow methods and thermal diffusivity for thermal diffusivity measurements of materials, is presented. In this comparison, a completely noncontact

Mandelis, Andreas

111

Highly Insulating Windows - Publ  

NLE Websites -- All DOE Office Websites (Extended Search)

Highly Insulating Windows - Publications Future Advanced Windows for Zero-Energy Homes, J. Apte, D. Arasteh, J. Huang, 2003 ASHRAE Annual Meeting, 2002 Nine representative window products are examined in eight representative U.S. climates. Annual energy and peak demand impacts are investigated. We conclude that a new generation of window products is necessary for zero-energy homes if windows are not to be an energy drain on these homes. Performance Criteria for Residential Zero Energy Windows, D. Arasteh, H. Goudey, J. Huang, C. Kohler, R. Mitchell, 2006, submitted to ASHRAE Through the use of whole house energy modeling, typical efficient products are evaluated in five US climates and compared against the requirements for ZEHs. Products which meet these needs are defined as a function of climate.

112

Thermal performance evaluation of a solar air heater with and without thermal energy storage  

Science Journals Connector (OSTI)

This communication presents the experimental study and performance analysis of a solar air heater with and without phase change ... found that the output temperature in case with thermal energy storage (TES) is h...

V. V. Tyagi; A. K. Pandey; S. C. Kaushik…

2012-03-01T23:59:59.000Z

113

Performance of see-through prism CPV module for window integrated photovoltaics  

Science Journals Connector (OSTI)

We have examined the performance of a see-through photovoltaics module that uses a low-concentration prism concentrator by undertaking ray-tracing analysis and an on-site experiment....

Yamada, Noboru; Kanno, Kosuke; Hayashi, Kentaro; Tokimitsu, Toru

2011-01-01T23:59:59.000Z

114

Appraisal of thermal performance of a glazed office with a solar control coating: Cases in Mexico and Canada  

Science Journals Connector (OSTI)

The use of solar passive strategies such as new solar control coatings on windows for buildings with large glazed areas, have recently become important and helpful tools, mainly because these developments help to reduce heat gains and/or losses through transparent materials, diminishing energy loads, and improving the environment inside buildings. This paper shows an assessment of the thermal performance for an office on top of a building with four different configurations of window glass, and their influence on the indoor conditions. The window glass configurations are: clear glass, glass-film (SnS–CuxS solar control coating), double-glass-film, and double clear glass. The simulations were carried out using weather data from Mexico City and Ottawa, which are a good representation of two extreme weather conditions, in order to assess the thermal behaviour inside offices, such as energy loads, costs for air conditioning, and the influence of interior heat transfer coefficient correlations. The results indicate that the glass-film proves to be the less appropriate configuration due to the high temperatures reached on the film surface, which has an impact on the air temperatures inside the office and contributes to increase the energy consumption. In general, the double glass-film configuration results to be adequate for both climates, nevertheless it shows a better performance for Ottawa than Mexico City, where a simple double clear glass would work the same way.

M. Gijón-Rivera; G. Álvarez; I. Beausoleil-Morrison; J. Xamán

2011-01-01T23:59:59.000Z

115

Windows and Building Envelope Facilities | Department of Energy  

Office of Environmental Management (EM)

Advanced Windows Testbed 1 of 2 LBNL's Advanced Windows Testbed This outdoor test facility contains three, thermally-isolated chambers that have been instrumented to...

116

Sensitivity analysis of window characteristics and their interactions on thermal performance in residential buildings  

E-Print Network (OSTI)

24 25 26 29 30 CHAPTER IV ANALYSIS OF RESULTS Method of Analysis Denver Miami Minneapolis Phoenix Seattle Washington DC V CONCLUSIONS AND RECOMMENDATIONS Conclusions Recommendations REFERENCES APPENDICES . VITA Page 33 33 34 54... Effects for Two Parameter Changes in Phoenix . . . . . . . . . 103 4. 5 Interaction Effects for Two Parameter Changes in Seattle 4. 6 Interaction Effects for Two Parameter Changes in Washington DC 117 133 4. 7 Ranking of Two Parameter Interactions...

George, Julie N

2012-06-07T23:59:59.000Z

117

Improving the Thermal Performance of Single Glazed Windows using Translucent Granular Aerogel  

E-Print Network (OSTI)

This paper is made available in accordance with Taylor & Francis publisher policies. Please cite the original published version only using the following reference:

Mark Dowson; David Harrison; Salmaan Craig; Zachary Gill

118

21 - Life cycle assessment (LCA) of windows and window materials  

Science Journals Connector (OSTI)

Abstract: Windows are a significant component in sustainable buildings in both the impacts caused by their material life cycles and by their influence on the performance of a building over its service life. Life cycle assessment (LCA) studies have compared the impacts of different framing materials with mixed results. LCA has also been used to estimate the environmental payback of higher manufacturing impacts from producing better performing windows. Future sustainable window selection should make use of standardized LCA data for windows and utilize advanced technologies to optimize window performance.

J. Salazar

2014-01-01T23:59:59.000Z

119

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

Cellular / Honeycomb Shades Cellular / Honeycomb Shades Updated 09/30/2013 It is now possible to model cellular / honeycomb shading systems in the Shading System Library and then add them to a glazing system in the Glazing System Library. NOTE: Before attempting to calculate a glazing system with a cellular shade, you must make the following change to the THERM7.ini file, which is located in C:\Users\Public\LBNL\Settings. Close WINDOW7 before making this change. DocPath=C:\Users\Public\LBNL\WINDOW7\debug Shading Layer Library A cellular / honeycomb shade can now be defined in the Shading Layer Library. Defining this type of shading system requires an XML file which contains information about the cell geometry and the material thermal and optical properties. WINDOW can model two different types of cellular shades:

120

Possible correlation between acoustic and thermal performances of building structures  

Science Journals Connector (OSTI)

Most European standards required high performance values for sound and thermal insulation in building structures according to Directive EEC 89/106. Sound transmission and heat transfer in structures have different physical and analytical approach and specific parameters of performance (i.e. sound transmission loss or thermal transmittance) are not directly correlated each others; many kind of structures have also different behaviour depending on mechanical properties of materials numbers of layers of materials etc. The aim of this work is to analyse possible correlation between sound transmission performances and thermal properties values in order to evaluated common trends related to physical properties of the various building components like for example density or surface mass.

Giovanni Semprini; Alessandro Cocchi; Cosimo Marinosci

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

LBNL-5800E Thermal Performance Impacts of Center-of- Glass Deflections in Installed Insulating  

NLE Websites -- All DOE Office Websites (Extended Search)

00E 00E Thermal Performance Impacts of Center-of- Glass Deflections in Installed Insulating Glazing Units R.G. Hart Lawrence Berkeley National Laboratory C.W. Goudey Lawrence Berkeley National Laboratory D.K. Arasteh Lawrence Berkeley National Laboratory D.C. Curcija Lawrence Berkeley National Laboratory Windows and Envelope Materials Group Building Technology and Urban Systems Department Environmental Energy Technologies Division June 2012 To be published in Energy and Buildings DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of

122

Thermal and Power Challenges in High Performance Computing Systems  

Science Journals Connector (OSTI)

This paper provides an overview of the thermal and power challenges in emerging high performance computing platforms. The advent of new sophisticated applications in highly diverse areas such as health, education, finance, entertainment, etc. is driving the platform and device requirements for future systems. The key ingredients of future platforms are vertically integrated (3D) die-stacked devices which provide the required performance characteristics with the associated form factor advantages. Two of the major challenges to the design of through silicon via (TSV) based 3D stacked technologies are (i) effective thermal management and (ii) efficient power delivery mechanisms. Some of the key challenges that are articulated in this paper include hot-spot superposition and intensification in a 3D stack, design/optimization of thermal through silicon vias (TTSVs), non-uniform power loading of multi-die stacks, efficient on-chip power delivery, minimization of electrical hotspots etc.

Venkat Natarajan; Anand Deshpande; Sudarshan Solanki; Arun Chandrasekhar

2009-01-01T23:59:59.000Z

123

Determining window solar heat gain coefficient  

SciTech Connect

The solar heat gain characteristics of fenestration systems impact daytime building energy performance, occupant comfort and utility load demands. A measure of the fraction of available solar energy entering a building interior per unit window area is defined as the solar heat gain coefficient (SHGC). Together with a window's thermal transmittance (U-value), the SHGC is used to compare fenestration products, and it allows for the calculation of energy rating number and annual energy performance. The need to measure and compared advances in window technology has led to the development of experimental and analytical methods for the determination of SHGC performance. Several test facilities currently or previously capable of performing SHGC measurements exist worldwide. Results experimentally determined using these facilities have provided design data for handbook tables, and have been instrumental in the development and validation of predictive analytical methods and computer simulation tools. However, these facilities have operated without a standard test procedure for SHGC performance. Consequently, recent efforts have been focused on developing consensus test procedures for the evaluation of window energy performance.

Harrison, S.J.; Wonderen, S.J. van (Queen's Univ., Kingston, Ontario (Canada). Solar Calorimetry Lab.)

1994-08-01T23:59:59.000Z

124

Effects of airflow infiltration on the thermal performance of internally  

NLE Websites -- All DOE Office Websites (Extended Search)

Effects of airflow infiltration on the thermal performance of internally Effects of airflow infiltration on the thermal performance of internally insulated ducts Title Effects of airflow infiltration on the thermal performance of internally insulated ducts Publication Type Journal Article Year of Publication 2000 Authors Levinson, Ronnen M., William W. Delp, Darryl J. Dickerhoff, and Mark P. Modera Journal Energy and Buildings Volume 32 Pagination 345-354 Keywords building design, Heat Island Abstract Air flowing through a supply duct infiltrates perviously faced, porous, internal duct insulation, degrading its thermal performance. Encapsulating the insulation's air-facing surface with an impervious barrier prevents infiltration, increasing the capacity of the conditioned supply air to heat or cool the space to which it is delivered. This study determined the air-speed dependence of the thermal conductivity of fiberglass insulation by measuring the inlet-to-outlet temperature drop of heated air flowing through a long, insulated flexible duct. The conductivity of a flexible duct's low-density, internal, fiberglass-blanket insulation increased with the square of the duct air speed, rising by 140% as the duct air speed increased from 0 to 15 m s-1. At air speeds recommended for branch ducts, the conductivity of such insulation would increase by 6% above its still-air value in a residential system and by 16% in a commercial system. Results partially agreed with those reported by an earlier study. Simulations indicate that encapsulating the air-stream surface of internal fiberglass duct insulation with an impervious barrier increases the effectiveness with which a duct delivers the thermal capacity of supply air by 0.15%-0.9% in typical duct systems.

125

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Single Glazing Single Glazing Single-Glazed, Clear Glass This figure illustrates the performance of a typical single-glazed unit with clear glass. Relative to all other glazing options, single-glazed with clear glass allows the highest transfer of energy (i.e. heat loss or heat gain depending on local climate conditions) while permitting the highest daylight transmission. Single Clear Center of Glass Properties Note: These values are for the center of glass only. They should only be used to compare the effect of different glazing types, not to compare total window products. Frame choice can drastically affect performance. Whole Window Properties - Single-Glazed, Clear Glass Metal Frame Non-metal Frame Metal Frame Metal Frame with Thermal Break Non-metal Frame Non-metal Frame, Thermally Improved

126

PERFORMANCE OF A CONCENTRATING PHOTOVOLTAIC/THERMAL SOLAR COLLECTOR  

E-Print Network (OSTI)

increased solar energy conversion and potential cost benefits (Fujisawa and Tani, 1997, 2001, Huang et alPERFORMANCE OF A CONCENTRATING PHOTOVOLTAIC/THERMAL SOLAR COLLECTOR Joe S Coventry Centre for Sustainable Energy Systems, Australian National University, Canberra, 0200, Australia +612 6125 3976, +612

127

Density dependence of reactor performance with thermal confinement scalings  

SciTech Connect

Energy confinement scalings for the thermal component of the plasma published thus far have a different dependence on plasma density and input power than do scalings for the total plasma energy. With such thermal scalings, reactor performance (measured by Q, the ratio of the fusion power to the sum of the ohmic and auxiliary input powers) worsens with increasing density. This dependence is the opposite of that found using scalings based on the total plasma energy, indicating that reactor operation concepts may need to be altered if this density dependence is confirmed in future research.

Stotler, D.P.

1992-03-01T23:59:59.000Z

128

Thermal Performance of Phase-Change Wallboard for Residential Cooling  

NLE Websites -- All DOE Office Websites (Extended Search)

6 6 Thermal Performance of Phase-Change Wallboard for Residential Cooling Cooling residential buildings in milder climates contributes significantly to peak demand mainly because of poor load factors. Peak cooling load determines the size of equipment and the cooling source. Several measures reduce cooling-system size and allow the use of lower-energy cooling sources; they include incorporating exterior walls or other elements that effectively shelter interiors from outside heat and cold, and providing thermal mass, to cool interior spaces during the day by absorbing heat and warm them at night as the mass discharges its heat. Thermal mass features may be used for storage only or serve as structural elements. Concrete, steel, adobe, stone, and brick all satisfy requirements

129

Thermal management and overall performance of a high concentration PV  

Science Journals Connector (OSTI)

An advanced thermal management approach for HCPV systems is demonstrated in this manuscript proposing the concept of efficient heat recovery at ultra high concentration ratios by collecting the heat on a high temperature level. With the availability of this low grade heat the efficiency of the HCPV system is increased further as the 'waste' heat is supplied to different thermal consumers engaging in thermal desalination or adsorption cooling processes. To asses the value of the concept we have estimated the economic value of heat with regard to its consumer and observed that this differs from its thermodynamic value. This valuable input is was used to determine the overall generated value of a dual output system as a function of the operation temperature where we have actively demonstrated a superior performance of the HCPVT.

Werner Escher; Stephan Paredes; Severin Zimmermann; Chin Lee Ong

2012-01-01T23:59:59.000Z

130

The performance check between whole building thermal performance criteria and exterior wall measured clear wall R-value, thermal bridging, thermal mass, and airtightness  

SciTech Connect

At the last IEA Annex 32 meeting it was proposed that the annex develop the links between level 1 (the whole building performance) and level 2 (the envelope system). This paper provides a case study of just that type of connection. An exterior wall mockup is hot box tested and modeled in the laboratory. Measurements of the steady state and dynamic behavior of this mockup are used as the basis to define the thermal bridging, thermal mass benefit and air tightness of the whole wall system. These level two performance characteristics are related to the whole building performance. They can be analyzed by a finite difference modeling of the wall assembly. An equivalent wall theory is used to convert three dimensional heat flow to one dimensional terms that capture thermal mass effects, which in turn are used in a common whole building simulation model. This paper illustrates a performance check between the thermal performance of a Massive ICF (Insulating Concrete Form) wall system mocked up (level 2) and Whole Building Performance criteria (level 1) such as total space heating and cooling loads (thermal comfort).

Kosny, J.; Christian, J.E.; Desjarlais, A.O. [Oak Ridge National Lab., TN (United States). Buildings Technology Center; Kossecka, E. [Polish Academy of Sciences (Poland); Berrenberg, L. [American Polysteel Forms (United States)

1998-06-01T23:59:59.000Z

131

Thermal performance of phase change wallboard for residential cooling application  

SciTech Connect

Cooling of residential California buildings contributes significantly to electrical consumption and peak power demand mainly due to very poor load factors in milder climates. Thermal mass can be utilized to reduce the peak-power demand, downsize the cooling systems, and/or switch to low-energy cooling sources. Large thermal storage devices have been used in the past to overcome the shortcomings of alternative cooling sources, or to avoid high demand charges. The manufacturing of phase change material (PCM) implemented in gypsum board, plaster or other wall-covering material, would permit the thermal storage to become part of the building structure. PCMs have two important advantages as storage media: they can offer an order-of-magnitude increase in thermal storage capacity, and their discharge is almost isothermal. This allows the storage of high amounts of energy without significantly changing the temperature of the room envelope. As heat storage takes place inside the building, where the loads occur, rather than externally, additional transport energy is not required. RADCOOL, a thermal building simulation program based on the finite difference approach, was used to numerically evaluate the latent storage performance of treated wallboard. Extended storage capacity obtained by using double PCM-wallboard is able to keep the room temperatures close to the upper comfort limits without using mechanical cooling. Simulation results for a living room with high internal loads and weather data for Sunnyvale, California, show significant reduction of room air temperature when heat can be stored in PCM-treated wallboards.

Feustel, H.E.; Stetiu, C.

1997-04-01T23:59:59.000Z

132

THERMAL PERFORMANCE MEASUREMENTS ON ULTIMATE HEAT SINKS - COOLING PONDS  

Office of Scientific and Technical Information (OSTI)

THERMAL PERFORMANCE MEASUREMENTS THERMAL PERFORMANCE MEASUREMENTS ON ULTIMATE HEAT SINKS - COOLING PONDS R. K. Hadlock 0 . B. Abbey Battelle Pacific Northwest Laboratories Prepared for U. S. Nuclear Regulatory Commission b + NOTICE This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor the United States Nuclear Regulatory Commission, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, nor assumes any legal liability or responsibility for the accuracy, completeness or usefulness of any information, apparatus, pro- duct or process disclosed, nor represents that its use would not infringe privately owned rights. F Available from National Technical Information Service

133

A First-Generation Prototype Dynamic Residential Window  

NLE Websites -- All DOE Office Websites (Extended Search)

A First-Generation Prototype Dynamic Residential Window A First-Generation Prototype Dynamic Residential Window Title A First-Generation Prototype Dynamic Residential Window Publication Type Report LBNL Report Number LBNL-56075 Year of Publication 2004 Authors Kohler, Christian, Howdy Goudey, and Dariush K. Arasteh Call Number LBNL-56075 Abstract We present the concept for a smart highly efficient dynamic window that maximizes solar heat gain during the heating season and minimizes solar heat gain during the cooling season in residential buildings. We describe a prototype dynamic window that relies on an internal shade, which deploys automatically in response to solar radiation and temperature. This prototype was built at Lawrence Berkeley National Laboratory from commercially available off-the-shelf components. It is a stand-alone, standard-size product, so it can be easily installed in place of standard window products. Our design shows promise for near-term commercialization. Improving thermal performance of this prototype by incorporating commercially available highly efficient glazing technologies could result in the first window that could be suitable for use in zero-energy homes. The units predictable deployment of shading could help capture energy savings that are not possible with manual shading. Installation of dynamically shaded windows in the field will allow researchers to better quantify the energy effects of shades, which could lead to increased efficiency in the sizing of heating, ventilation, and air conditioning equipment for residences.

134

Thermal Performance Evaluation of Innovative Metal Building Roof Assemblies  

SciTech Connect

In order to meet the coming energy codes, multiple layers of various insulation types will be required. The demand for greater efficiency has pushed insulation levels beyond the cavity depth. These experiments show the potential for improving metal building roof thermal performance. Additional work is currently being done by several stakeholders, so the data is expanding. These experiments are for research and development purposes, and may not be viable for immediate use.

Walker, Daniel James [ORNL; Zaltash, Abdolreza [ORNL; Atchley, Jerald Allen [ORNL

2011-01-01T23:59:59.000Z

135

A study on the proposes of energy analysis indicator by the window elements of office buildings in Korea  

Science Journals Connector (OSTI)

Abstract Recently, the window area ratio of buildings has increased but the thermal insulation performance of windows is lower than the wall. Therefore, many studies have been carried out to reduce this heat loss. The Republic of Korea policies and guidelines for windows do not consider the optical and design elements of windows because it is more important to the insulation performance of windows. This paper proposes the supplement point of the Korea's policies and guidelines regarding windows through a comparison of Korea's policies and guidelines for windows, checks the variation of the energy consumption of buildings through the variation of the window elements, and proposes an energy analysis indicator for the Republic of Korea's situation. This study confirmed that the variation of the window elements affect to energy consumption by previous studies to consider in window design according to the policies and guidelines. The window elements were divided into performance elements of the windows and architectural/equipment plan element. By analyzing the energy consumption by changing the element, this study confirmed the variation of energy consumption by using the COMFEN4.0 simulation tool. This paper proposes an actual energy analysis indicator in the Republic of Korea.

Seok-Hyun Kim; Sun-Sook Kim; Kwang-Woo Kim; Young-Hum Cho

2014-01-01T23:59:59.000Z

136

Seeing Windows Through  

NLE Websites -- All DOE Office Websites (Extended Search)

8 8 Seeing Windows Through A profusion of gases, glazings, and gap sizes are among the factors that confound efforts to measure the energy performance of a window or skylight. The increasing variety of efficiency-enhancing options for windows and their frames poses a formidable challenge to builders, utilities, code officials, and consumers. Fortunately, a new system for accurately rating and labeling these products promises to help demystify them and to foster nationwide improvements in energy efficiency. NFRC is Born Window trade groups have historically organized around specific materials or components (such as glass or frames), and energy has rarely been their focal point. This changed in 1989 with the formation of the National Fenestration Rating Council. One impetus behind the industry's

137

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Understanding Windows Understanding Windows Benefits of Energy Efficient Windows The purpose for windows is to provide natural light, natural ventilation, and views to the outside. The benefits of high performance windows allows for Energy & Cost Savings, Improved Comfort, Less Condensation, Increased Light & View, Reduced Fading, and Lower HVAC Costs. Benefits of Energy Efficient Windows Design Considerations Windows are a complex and interesting element in residential design. New window products and technologies have changed the performance of windows in a radical way. Issues such as climate, orientation, shading, and window area all effect the energy performance, but human factor issues such as access to fresh air, daylight, and natural views impact the comfort of a home.

138

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Measuring Performance: Air Leakage (AL) Measuring Performance: Air Leakage (AL) Is my window leaking air? The Air Leakage (AL) rating pertains to leakage through the window assembly itself. Air infiltration can also occur around the frame of the window due to poor installation or poor maintenance of existing window systems. Make sure windows are properly installed and maintained (caulking and weatherstripping). Cold glass can create uncomfortable drafts as air next to the window is cooled and drops to the floor. This is not a result of air leaking through or around the window assembly but from a convective loop created when next to a window is cooled and drops to the floor. This air movement can be avoided by installing high-performance windows. Heat loss and gain occur by infiltration through cracks in the window

139

Thermal Performance of Phase Change Wallboard for Residential Cooling Application  

E-Print Network (OSTI)

the discharge of thermal energy storage without releasingto low-energy cooling sources. Large thermal storage devices

Feustel, H.E.

2011-01-01T23:59:59.000Z

140

Performance of thermal distribution systems in large commercial buildings  

NLE Websites -- All DOE Office Websites (Extended Search)

Performance of thermal distribution systems in large commercial buildings Performance of thermal distribution systems in large commercial buildings Title Performance of thermal distribution systems in large commercial buildings Publication Type Journal Article LBNL Report Number LBNL-44331 Year of Publication 2002 Authors Xu, Tengfang T., François Rémi Carrié, Darryl J. Dickerhoff, William J. Fisk, Jennifer A. McWilliams, Duo Wang, and Mark P. Modera Journal Energy and Buildings Volume 34 Start Page Chapter Pagination 215-226 Abstract This paper presents major findings of a field study on the performance of five thermal distribution systems in four large commercial buildings. The five systems studied are typical single-duct or dual-duct constant air volume (CAV) systems and variable air volume (VAV) systems, each of which serves an office building or a retail building with floor area over 2,000 m2. The air leakage from ducts are reported in terms of effective leakage area (ELA) at 25 Pa reference pressure, the ASHRAE-defined duct leakage class, and air leakage ratios. The specific ELAs ranged from 0.7 to 12.9 cm2 per m2 of duct surface area, and from 0.1 to 7.7 cm2 per square meter of floor area served. The leakage classes ranged from 34 to 757 for the five systems and systems sections tested. The air leakage ratios are estimated to be up to one-third of the fan- supplied airflow in the constant-air-volume systems. The specific ELAs and leakage classes indicate that air leakage in large commercial duct systems varies significantly from system to system, and from system section to system section even within the same thermal distribution system. The duct systems measured are much leakier than the ductwork specified as "unsealed ducts" by ASHRAE. Energy losses from supply ducts by conduction (including convection and radiation) are found to be significant, on the scale similar to the losses induced by air leakage in the duct systems. The energy losses induced by leakage and conduction suggest that there are significant energy-savings potentials from duct-sealing and insulation practice in large commercial buildings

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Spring Home Maintenance: Windows, Windows, Windows! | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Spring Home Maintenance: Windows, Windows, Windows! Spring Home Maintenance: Windows, Windows, Windows! Spring Home Maintenance: Windows, Windows, Windows! April 26, 2013 - 11:42am Addthis Caulking is an easy way to reduce air leakage around your windows. | Photo courtesy of ©iStockphoto.com/BanksPhotos Caulking is an easy way to reduce air leakage around your windows. | Photo courtesy of ©iStockphoto.com/BanksPhotos Erin Connealy Communications Specialist, Office of Energy Efficiency and Renewable Energy How can I participate? Use these tips for window maintence and treatments to save energy this spring. The beginning of spring marks the point in the year when I'm cleaning, purging the house of things I no longer need, and updating my home on needed repairs. This year, I'm focusing on how to lower my energy bills

142

Spring Home Maintenance: Windows, Windows, Windows! | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Home Maintenance: Windows, Windows, Windows! Home Maintenance: Windows, Windows, Windows! Spring Home Maintenance: Windows, Windows, Windows! April 26, 2013 - 11:42am Addthis Caulking is an easy way to reduce air leakage around your windows. | Photo courtesy of ©iStockphoto.com/BanksPhotos Caulking is an easy way to reduce air leakage around your windows. | Photo courtesy of ©iStockphoto.com/BanksPhotos Erin Connealy Communications Specialist, Office of Energy Efficiency and Renewable Energy How can I participate? Use these tips for window maintence and treatments to save energy this spring. The beginning of spring marks the point in the year when I'm cleaning, purging the house of things I no longer need, and updating my home on needed repairs. This year, I'm focusing on how to lower my energy bills

143

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Assessing Window Replacement Options Assessing Window Replacement Options What are the benefits of energy-efficient windows? Energy & Cost Savings Improved Comfort Less Condensation Increased Light & View Reduced Fading Lower HVAC Costs How is window performance measured? U-factor Solar Heat Gain Coefficient Visible Transmittance Air Leakage Condensation Resistance Are there financing and incentive programs? Overview of Utility and State Programs Performance Standards Energy Rating Programs Building America Program Documents Measure Guideline: Energy-Efficient Window Performance and Selection exit disclaimer Measure Guideline: Wood Window Repair, Rehabilitation, and Replacement exit disclaimer Whether you would like to improve the energy performance of your existing windows or replace them with new energy-efficient windows, several options are available. An energy audit can help you identify good strategies for more efficient windows and a more efficient house. Whichever energy efficiency measures you consider, the federal government as well as state, local, and utility programs may offer financing help or weatherization assistance.

144

Performance comparison of thermal energy storage oils for solar cookers during charging  

Science Journals Connector (OSTI)

Abstract Charging experiments to evaluate the thermal performance of three thermal energy storage oils for solar cookers are presented. An experimental setup using an insulated 20 L storage tank is used to perform the experiments. The three thermal oils evaluated are Sunflower Oil, Shell Thermia C and Shell Thermia B. Energy and exergy based thermal performance parameters are evaluated. A new parameter, the exergy factor, is proposed which evaluates the ratio of the exergy content to the energy content. Sunflower Oil performs better than the other thermal oils under high power charging. Thermal performances of the oils are comparable under low power charging.

Ashmore Mawire; Abigail Phori; Simeon Taole

2014-01-01T23:59:59.000Z

145

Energy-Efficient Windows | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy-Efficient Windows Energy-Efficient Windows Energy-Efficient Windows June 18, 2012 - 8:39am Addthis Energy-efficient windows provide space heating and lighting to this sunny kitchen. | Photo courtesy of Emily Minton-Redfield for Jim Logan Architects. Energy-efficient windows provide space heating and lighting to this sunny kitchen. | Photo courtesy of Emily Minton-Redfield for Jim Logan Architects. What does this mean for me? The windows in your house let in light and air if they're operable, but they can also be weak spots in your home's thermal envelope. When replacing windows, purchase the most energy-efficient windows you can afford, because they will pay for themselves over their lifetimes. Windows provide our homes with light, warmth, and ventilation, but they can also negatively impact a home's energy efficiency. You can reduce energy

146

Energy-Efficient Windows | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy-Efficient Windows Energy-Efficient Windows Energy-Efficient Windows June 18, 2012 - 8:39am Addthis Energy-efficient windows provide space heating and lighting to this sunny kitchen. | Photo courtesy of Emily Minton-Redfield for Jim Logan Architects. Energy-efficient windows provide space heating and lighting to this sunny kitchen. | Photo courtesy of Emily Minton-Redfield for Jim Logan Architects. What does this mean for me? The windows in your house let in light and air if they're operable, but they can also be weak spots in your home's thermal envelope. When replacing windows, purchase the most energy-efficient windows you can afford, because they will pay for themselves over their lifetimes. Windows provide our homes with light, warmth, and ventilation, but they can also negatively impact a home's energy efficiency. You can reduce energy

147

Standard Guide for Specifying Thermal Performance of Geothermal Power Systems  

E-Print Network (OSTI)

1.1 This guide covers power plant performance terms and criteria for use in evaluation and comparison of geothermal energy conversion and power generation systems. The special nature of these geothermal systems makes performance criteria commonly used to evaluate conventional fossil fuel-fired systems of limited value. This guide identifies the limitations of the less useful criteria and defines an equitable basis for measuring the quality of differing thermal cycles and plant equipment for geothermal resources. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

American Society for Testing and Materials. Philadelphia

2000-01-01T23:59:59.000Z

148

Performance contracting for parabolic trough solar thermal systems  

SciTech Connect

Several applications of solar energy have proven viable in the energy marketplace, due to competitive technology and economic performance. One example is the parabolic trough solar collectors, which use focused solar energy to maximize efficiency and reduce material use in construction. Technical improvements are complemented by new business practices to make parabolic trough solar thermal systems technically and economically viable in an ever widening range of applications. Technical developments in materials and fabrication techniques reduce production cost and expand applications from swimming pool heating and service hot water, to higher-temperature applications such as absorption cooling and process steam. Simultaneously, new financing mechanisms such as a recently awarded US Department of Energy (DOE) Federal Energy Management Program (FEMP) indefinite quantity Energy Savings Performance Contract (Super ESPC) facilitate and streamline implementation of the technology in federal facilities such as prisons and military bases.

Brown, H.; Hewett, R.; Walker, A. [National Renewable Energy Lab., Golden, CO (United States); Gee, R.; May, K. [Industrial Solar Technology, Golden, CO (United States)

1997-12-31T23:59:59.000Z

149

International Space Station power module thermal control system hydraulic performance  

SciTech Connect

The International Space Station (ISS) uses four photovoltaic power modules (PVMs) to provide electric power for the US On-Orbit Segment. The PVMs consist of photovoltaic arrays (PVAs), orbit replaceable units (ORUs), photovoltaic radiators (PVRs), and a thermal control system (TCS). The PVM TCS function is to maintain selected PVM components within their specified operating ranges. The TCS consists of the pump flow control subassembly (PFCS), piping system, including serpentine tubing for individual component heat exchangers, headers/manifolds, fluid disconnect couplings (FQDCs), and radiator (PVR). This paper describes the major design requirements for the TCS and the results of the system hydraulic performance predictions in regard to these requirements and system component sizing. The system performance assessments were conducted using the PVM TCS fluid network hydraulic model developed for predicting system/component pressure losses and flow distribution. Hardy-Cross method of iteration was used to model the fluid network configuration. Assessments of the system hydraulic performance were conducted based on an evaluation of uncertainties associated with the manufacturing and design tolerances. Based on results of the analysis, it was concluded that all design requirements regarding system performance could be met. The hydraulic performance range, enveloping possible system operating parameter variations was determined.

Goldberg, V. [Boeing North American, Inc., Canoga Park, CA (United States). Rocketdyne Div.

1997-12-31T23:59:59.000Z

150

Preliminary Investigation into Solar Thermal Combi-system Performance.  

E-Print Network (OSTI)

??Solar thermal combi-systems use solar energy to provide thermal energy for space heating and domestic hot water. These systems come in many different designs and… (more)

Lee, Elizabeth

2014-01-01T23:59:59.000Z

151

End User Impacts of Automated Electrochromic Windows in a Pilot Retrofit Application  

E-Print Network (OSTI)

2006. Advancement of electrochromic windows: Final report.User Impacts of Automated Electrochromic Windows in a Pilotenergy performance of electrochromic windows controlled for

Lee, Eleanor S.

2014-01-01T23:59:59.000Z

152

Advancement of Electrochromic Windows  

E-Print Network (OSTI)

Guide for Early-Market Electrochromic Windows. LBNL-59950.Guide for Early-Market Electrochromic Windows Attachment 17:electrochromic prototype windows that were deemed sufficiently mature for market

2006-01-01T23:59:59.000Z

153

Highly Insulating Residential Windows Using Smart Automated Shading  

Energy.gov (U.S. Department of Energy (DOE))

Lead Performer: Lawrence Berkeley National Laboratory - Berkeley, CA Partner: Pella Windows - Pella, IA

154

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Benefits of Efficient Windows Benefits of Efficient Windows Looking for information on windows for a new house? Window Selection Tool Selection Process Design Guidance Installation Looking for information on replacement windows? Window Selection Tool Assessing Options Selection Process Design Guidance Installation Energy & Cost Savings Energy efficient windows can substantially reduce the costs associated with heating and cooling. This section on Energy & Cost Savings illustrates these savings in both heating and cooling climates. Energy Savings Lower HVAC Costs High-performance windows not only provide reduced annual heating and cooling bills, they also reduce the peak heating and cooling loads. This section on Lower HVAC Cost illustrates how the use of high performance windows can help in reducing HVAC equipment sizing.

155

13-Energy Efficiency Ratio Window Air Conditioner | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Window Air Conditioner 13-Energy Efficiency Ratio Window Air Conditioner Lead Performer: Oak Ridge National Laboratory - Oak Ridge, TN Partners: General Electric - Fairfield, CT...

156

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

CGDB Import Into WINDOW CGDB Import Into WINDOW Updated: 11/14/12 Detailed Instructions for Importing CGDB data into WINDOW These instructions apply to either WINDOW 6 or 7. WINDOW 6 vs WINDOW 7 Because the database structure of WINDOW 6 is different that WINDOW 7, there are different CGDB files to go with each version of WINDOW. There are also different versions of the XML files for each version, because in WINDOW 7 some problems with the files were fixed. Setup of CGDB The CGDB consists of a WINDOW database of records in the Shading Layer, Shade Material Library, and Glass Library, as well as a set of text files for systems that reference BSDF XML files. Database: The installation will put two databases into the "LBNL Shared" directory: (the location will depend on your operating system):

157

THERMAL PERFORMANCE OF RADIOACTIVE MATERIAL PACKAGES IN TRANSPORT CONFIGURATION  

SciTech Connect

Drum type packages are routinely used to transport radioactive material (RAM) in the U.S. Department of Energy (DOE) complex. These packages are designed to meet the federal regulations described in 10 CFR Part 71. The packages are transported in specially designed vehicles like Safe Secure Transport (SST) for safety and security. In the transport vehicles, the packages are placed close to each other to maximize the number of units in the vehicle. Since the RAM contents in the packagings produce decay heat, it is important that they are spaced sufficiently apart to prevent overheating of the containment vessel (CV) seals and the impact limiter to ensure the structural integrity of the package. This paper presents a simple methodology to assess thermal performance of a typical 9975 packaging in a transport configuration.

Gupta, N.

2010-03-04T23:59:59.000Z

158

Thermal hydraulic performance analysis of a small integral pressurized water reactor core  

E-Print Network (OSTI)

A thermal hydraulic analysis of the International Reactor Innovative and Secure (IRIS) core has been performed. Thermal margins for steady state and a selection of Loss Of Flow Accidents have been assessed using three ...

Blair, Stuart R. (Stuart Ryan), 1972-

2003-01-01T23:59:59.000Z

159

LBNL Window & Daylighting Software -- WINDOW 6 Research Version  

NLE Websites -- All DOE Office Websites (Extended Search)

7.0 7.0 Last Updated: 05/20/2013 EN 673 / ISO 10077 Using WINDOW 7 and THERM 7 for EN 673 / ISO 10077 Calculations If you are interested in using WINDOW and THERM for EN 673 / ISO 10077 calculations, we have added that option to WINDOW 7. The calculation is not fully automated in the program yet, so there are many steps and a spreadsheet for the final calculation. We are interested in feedback (email WINDOWHelp@lbl.gov) about the process and the results from anyone who tests this feature. CAUTION: Do not model shading systems with the EN 673 thermal model. The program will produce results but they will most likely not be correct. Download this zip file (EN673.zip) which contains the following: Description of how to use WINDOW 6 and THERM 6 for the EN 673 / ISO 10077 calculations (PDF file)

160

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Performance Standards Performance Standards Even the expert eye cannot easily tell an efficient window from a conventional window. That is why energy ratings, endorsement programs and consumer incentives play an important role in creating awareness for window energy efficiency among consumers, builders, architects and performance standard programs. Learn about NFRC certification and labeling Learn about ENERGY STAR® for windows, doors and skylights High Performance Windows and Low-E Storm Windows Volume Purchase Program Utility and State Incentives for energy efficiency improvements Building Codes Most locations have building energy codes that mandate minimum performance levels for windows, doors, and skylights. The builder, contractor or homeowner must adhere to the code requirements, which typically cover

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Thermal and lighting performance of toplighting systems in the hot and humid climate of Thailand  

E-Print Network (OSTI)

performance of three toplighting systems were compared. For the thermal performance, total cooling loads, heat gains and losses, and interior temperature were evaluated. The lighting performance parameters examined were daylight factor, illuminance level...

Harntaweewongsa, Siritip

2006-10-30T23:59:59.000Z

162

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacuum Glazing Modeling Vacuum Glazing Modeling It is now possible to model vacuum glazing in WINDOW 7. The first step is to define a new vacuum "gap" in the "Gap Library" (formerly the Gas Library). Then that vacuum gap is used in a glazing system to calculate the thermal characteristics of the glazing system with a vacuum gap. Gap Library The Gas Library has been renamed the Gap Library. To define a vacuum gap, check the "Vacuum" checkbox (this is only available for single gases, not gas mixtures). When this box is checked, new input variables will appear, including the vacuum pressure, the specific heat ratio and molecular weight of the vacuum gas. It is also necessary to define a pillar system for the vacuum gap. Pillar Definition Double click the double arrow to the right of the Pillar Definition pulldown to define a new pillar system. Define the shape and dimensions of the pillar system.

163

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Windows for New Construction Windows for New Construction Window Selection Tool Use the Window Selection Tool for new construction to compare performance of 20 different window types in your location. The Window Selection Tool will take you through a series of design conditions pertaining to your design and location. It is a step-by-step decision-making tool to help determine the most energy efficient window for your house. Window Selection Tool Window Selection Process This section provides step-by-step guidance on the window selection process for new construction windows including issues of code, energy, durability, and installation. Design Guidance This section provides Design Guides that examine the energy use impacts of new windows for homes in hot, mixed and cold climates. They show the the impact of orientation, window area, and shading. The energy use has been calculated for various window design variations including 5 orientations (equal, north, east, south, and west), 3 glazing areas, 20 glazing types, and 5 shading conditions.

164

Performance investigation of various cold thermal energy storages.  

E-Print Network (OSTI)

??This study deals with solidification and melting of some typical encapsulated ice thermal energy storage geometries. Using ANSYS GAMBIT and FLUENT 6.0 software, HTF fluid… (more)

MacPhee, David

2008-01-01T23:59:59.000Z

165

An Experimental and Analytical Evaluation of Wall And Window Retrofit Configurations: Supporting the Residential Retrofit Best Practices Guide  

SciTech Connect

A Retrofit Best Practices Guide was developed to encourage homeowners to consider energy conservation issues whenever they modify their siding or windows. In support of this guide, an experimental program was implemented to measure the performance of a number of possible wall siding and window retrofit configurations. Both thermal and air-leakage measurements were made for a 2.4 x 2.4 m (8 x 8 ft) wall section with and without a 0.9 x 1.2 m (3 x 4 ft) window. The windows tested were previously well-characterized at a dedicated window test facility. A computer model was also used to provide information for the Best Practices Guide. The experimental data for walls and windows were used in conjunction with this model to estimate the total annual energy savings for several typical houses in a number of different locations.

Stovall, Therese K [ORNL; Petrie, Thomas [ORNL; Kosny, Jan [ORNL; Childs, Phillip W [ORNL; Atchley, Jerald Allen [ORNL; Hulvey, Kimberly D [ORNL

2007-11-01T23:59:59.000Z

166

Comparative study of the thermal and power performances of a semi-transparent photovoltaic façade under different ventilation modes  

Science Journals Connector (OSTI)

Abstract This paper studied the thermal and power performances of a ventilated photovoltaic façade under different ventilation modes, and appropriate operation strategies for different weather conditions were proposed accordingly to maximize its energy conversion efficiency. This ventilated PV double-skin façade (PV-DSF) consists of an outside layer of semi-transparent amorphous silicon (a-Si) PV laminate, an inward-openable window and a 400 mm airflow cavity. Before installation, the electrical characteristics under standard testing conditions (STC) and the temperature coefficients of the semi-transparent PV module were tested and determined in the laboratory. Field measurements were carried out to investigate the impact of different ventilation modes, namely, ventilated, buoyancy-driven ventilated and non-ventilated, on the thermal and power performances of this PV-DSF. The results show that the ventilated PV-DSF provides the lowest average solar heat gain coefficient (SHGC) and the non-ventilated PV-DSF provides the best thermal insulation performance. In terms of power performance, the energy output of the ventilated PV-DSF is greater than those of the buoyancy-driven ventilated and non-ventilated PV-DSFs by 1.9% and 3%, respectively, due to its much lower operating temperature. Based on the experimental results, a conclusion was drawn that the ventilation design can not only reduce the heat gain of PV-DSF but also improve the energy conversion efficiency of PV modules by bringing down their operating temperature. In addition, an optimum operation strategy is recommended for this kind of PV-DSF to maximize its overall energy efficiency under different weather conditions.

Jinqing Peng; Lin Lu; Hongxing Yang; Tao Ma

2014-01-01T23:59:59.000Z

167

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

(6.3.74 -- February 14, 2012) Release Notes Updated: 02/15/13 If you find bugs, or if you think these have not been fixed, please do not hesitate to send an email to WINDOWHelp@lbl.gov to report your findings. Getting feedback from users is how we improve the program. WINDOW 6.3.74 Program Changes Window LIbrary: Window Types In previous versions of WINDOW 6.3, there were two different Window Type lists, with conflicting ID numbers, which resulted in the possibility of a Window Library made with one set of Window Types would become corrupted (the wrong Window Types assigned) if the database records were imported into a another database with the different Window Type list. To solve this problem, we have added a database "migration" with this version of WINDOW -- when it opens any older database, it will update the Window Types list to have the choices (and IDs) shown below and then it will also update all the Window Library records to map to the new Window Types based on what the records were set to originally.

168

An experimental study of the thermal performance of a novel photovoltaic double-skin facade in Hong Kong  

Science Journals Connector (OSTI)

Abstract Ventilated building-integrated photovoltaic (BIPV) facades can not only generate electricity at the locations of buildings themselves but if designed optimally, such facades can also reduce the respective heat gains and heat losses in summer and winter via the building envelope. The development of a novel ventilated BIPV double-skin facade (DSF), constituted by a see-through amorphous silicon (a-Si) PV module and an inward opening window, is reported in this paper. In order to enhance ventilation, an air-flow duct, 400 mm in depth is situated between the outside PV module and the inside window. This ventilation design can remove much of the waste heat generated by the PV module energy conversion processes, and thus bring down the operating temperature of the solar cells. Infrared thermal imaging was adopted in relation to the ventilated PV-DSF to visually demonstrate this ventilating effect. It was found that the air temperature at the outlet louver is higher than that at the inlet louver by 2.2–2.3 °C. The thermal performance of PV-DSFs operating in different modes was studied and compared. The results showed that the ventilated PV-DSF provides the lowest solar heat gain coefficient (SHGC), while the non-ventilated PV-DSF better reduces heat loss. Based on the experimental results, the optimum operation strategy for the PV-DSF under different weather conditions has been determined and proposed. This novel PV-DSF is more suitable for sub-tropical climates because it results in a much lower SHGC than that of a low-e coating DSF.

Jinqing Peng; Lin Lu; Hongxing Yang

2013-01-01T23:59:59.000Z

169

LBNL Windows & Daylighting Software -- WINDOW  

NLE Websites -- All DOE Office Websites (Extended Search)

WINDOW WINDOW NFRC Certification Version Release Version Beta Version WINDOW 6.3 (For NFRC Certification and modeling Complex Glazing Systems) WINDOW 7.1 For modeling vacuum glazing, deflected glass, vertical venetian blinds and perforated screens WINDOW 7.2 For modeling Cellular Shades, in addition to vacuum glazing, deflected glass, vertical venetian blinds and perforated screens Download WINDOW 6.3 (for NFRC Certification and complex glazing systems) Download WINDOW 7.1 Download WINDOW 7.2 Knowledge Base (Check here first if you are experiencing a problem with the software) Knowledge Base (Check here first if you are experiencing a problem with the software) Knowledge Base (Check here first if you are experiencing a problem with the software) New Features

170

Performance of Thermal Insulation Containing Microencapsulated Phase Change Material  

SciTech Connect

The objective of this study is dynamic thermal performance microencapsulated phase change material (PCM) blended with loose-fill cellulose insulation. Dynamic hot-box testing and heat-flux measurements have been made for loose-fill cellulose insulation with and without uniformly distributed microencapsulated PCM. The heat flux measurements were made with a heat-flow-meter (HFM) apparatus built in accordance with ASTM C 518. Data were obtained for 1.6 lb{sub m}/ft{sup 3} cellulose insulation containing 0 to 40 wt% PCM. Heat-flux data resulting from a rapid increase in the temperature on one side of a test specimen initially at uniform temperature were analyzed to access the effect of PCM on total heat flow. The heat flux was affected by the PCM for about 100 minutes after the temperature increase. The total heat flow during this initial period decreased linearly with PCM content from 6.5 Btu/ft{sup 2} at 0% PCM to 0.89 Btu/ft{sup 2} for 40 wt% PCM. The cellulose insulation with PCM discharged heat faster than the untreated cellulose when the hot-side temperature of the test specimen was reduced. In addition, hot-box apparatus built in accordance with ASTM C 1363 was utilized for dynamic hot-box testing of a wood stud wall assembly containing PCM-enhanced cellulose insulation. Experimental data obtained for wood-frame wall cavities containing cellulose insulation with PCM was compared with results obtained from cavities containing only cellulose insulation.

Kosny, Jan [ORNL] [ORNL; Yarbrough, David [R & D Services] [R & D Services; Syed, Azam M [ORNL] [ORNL

2007-01-01T23:59:59.000Z

171

Advancement of Electrochromic Windows  

E-Print Network (OSTI)

of a thin-film ceramic electrochromic window: Field studyof a Thin-Film Ceramic Electrochromic Window: Field StudyEC window product characteristics The EC is a thin-film WO3-

2006-01-01T23:59:59.000Z

172

Thermal Management of High-Performance Lithium-Ion Batteries  

Science Journals Connector (OSTI)

The battery power and lifetime depend to a large...cool...) is usually reduced using a high volumetric flow rate. Lathin technology from Behr ensures efficient temperature homogenisation (locally adapted thermal ...

Dr.-Ing. Matthias Stripf; Dr.-Ing. Manuel Wehowski…

2012-01-01T23:59:59.000Z

173

Enhanced thermal and gas flow performance in a three-way catalytic...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

flow performance in a three-way catalytic converter through use of insulation within the ceramic monolith Enhanced thermal and gas flow performance in a three-way catalytic...

174

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Considerations for Window Performance Considerations for Window Performance Advanced window technologies can have a major effect on comfort and on the annual energy performance of a house. However, there is a broader and possibly more significant impact of the recent revolution in window performance. Because the new glazing technologies provide highly effective insulating value and solar protection, there are important implications for how a house is designed. There is a long-established set of window design guidelines and assumptions intended to reduce heating and cooling energy use. These are based, in part, on the historical assumption that windows were the weak link in the building envelope. These assumptions frequently created limitations on design freedom or generated conflicts with other performance requirements,

175

Study on thermal performance of high power LED employing aluminum filled epoxy composite as thermal interface material  

Science Journals Connector (OSTI)

Abstract This paper elucidates the thermal behavior of an LED employing metal filled polymer matrix as thermal interface material (TIM) for an enhanced heat dissipation characteristic. Highly thermal conductive aluminum (Al) particles were incorporated in bisphenol A diglycidylether (DGEBA) epoxy matrix to study the effect of filler to polymer ratio on the thermal performance of high power LEDs. The curing behavior of DGEBA was studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The dispersion nature of the Al fillers in polymer matrix was verified with Field Emission Scanning Electron Microscope (FESEM). The thermal performance of synthesized Al filled polymer composite as TIM was tested with an LED employing thermal transient measurement technique. Comparing the filler to polymer ratio, the rise in junction temperature for 60 wt% Al filled composite was higher by 11.1 °C than 50 wt% Al filled composite at cured state. Observed also from the structure function analysis that the total thermal resistance was 10.96 K/W higher for 60 wt% Al filled composite compared to 50 wt% Al filled composite. On the other hand, a significant rise of 9.5 °C in the junction temperature between cured and uncured samples of 50 wt% Al filled polymer TIM was observed and hence the importance of curing process of metal filled polymer composite for effective heat dissipation is discussed extensively in this work.

P. Anithambigai; S. Shanmugan; D. Mutharasu; T. Zahner; D. Lacey

2014-01-01T23:59:59.000Z

176

Key Elements of and Materials Performance Targets for Highly Insulating  

NLE Websites -- All DOE Office Websites (Extended Search)

Key Elements of and Materials Performance Targets for Highly Insulating Key Elements of and Materials Performance Targets for Highly Insulating Window Frames Title Key Elements of and Materials Performance Targets for Highly Insulating Window Frames Publication Type Journal Article LBNL Report Number LBNL-5099E Year of Publication 2011 Authors Gustavsen, Arlid, Steinar Grynning, Dariush K. Arasteh, Bjørn Petter Jelle, and Howdy Goudey Journal Energy and Buildings Volume 43 Issue 10 Pagination 2583-2594 Date Published 10/2011 Keywords Fenestration, heat transfer modeling, thermal performance, thermal transmittance, u-factor, window frames Abstract The thermal performance of windows is important for energy efficient buildings. Windows typically account for about 30-50 percent of the transmission losses though the building envelope, even if their area fraction of the envelope is far less. The reason for this can be found by comparing the thermal transmittance (U-factor) of windows to the U-factor of their opaque counterparts (wall, roof and floor constructions). In well insulated buildings the U-factor of walls, roofs an floors can be between 0.1-0.2 W/(m2K). The best windows have U-values of about 0.7-1.0. It is therefore obvious that the U-factor of windows needs to be reduced, even though looking at the whole energy balance for windows (i.e. solar gains minus transmission losses) makes the picture more complex.

177

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

Specular Glazing Systems Specular Glazing Systems NFRC THERM 6.3 / WINDOW 6.3 Simulation Manual July 2013: bullet Entire Manual in PDF Format approximate 8 MB Comparison of WINDOW 5 / THERM 5 and WINDOW 6 / THERM 6 Results for Specular Glazing Systems (PDF Format) NFRC WINDOW 6 / THERM 6 Training for Specular Systems (Power Point Presentation, Oct/Nov 2010) Tutorials Complex Glazing Systems bullet WINDOW 6.2 / THERM 6.2 Research Version User Manual (Documents features in WINDOW6 and THERM 6 for modeling complex glazing systems) bullet WINDOW 6.2 / THERM 6.2 Simulation Manual Chapter for Complex Glazing (Draft) This was used for NFRC Simulator training in June 2009, and includes detailed descriptions for modeling venetian blinds between glass and frits. bullet Complex Glazing Summary -- PDF File

178

Dynamic Windows  

Energy.gov (U.S. Department of Energy (DOE))

Lead Performer: National Renewable Energy Laboratory - Golden, CO Partners: -- Sage Electrochromics - Faribault, MN -- e-Chromic Technologies, Inc. - Boulder, CO -- Colorado School of Mines - Golden, CO -- Stanford Linear Accelerator - Menlo Park, CA -- University of Denver - Denver, CO

179

Rigid thin windows for vacuum applications  

DOE Patents (OSTI)

A thin window that stands off atmospheric pressure is fabricated using photolithographic and wet chemical etching techniques and comprises at least two layers: an etch stop layer and a protective barrier layer. The window structure also comprises a series of support ribs running the width of the window. The windows are typically made of boron-doped silicon and silicon nitride and are useful in instruments such as electron beam guns and x-ray detectors. In an electron beam gun, the window does not impede the electrons and has demonstrated outstanding gun performance and survivability during the gun tube manufacturing process.

Meyer, Glenn Allyn (Danville, CA); Ciarlo, Dino R. (Livermore, CA); Myers, Booth Richard (Livermore, CA); Chen, Hao-Lin (Lafayette, CA); Wakalopulos, George (Pacific Palisades, CA)

1999-01-01T23:59:59.000Z

180

Numerical evaluation of the thermal performances of roof-mounted radiant barriers  

E-Print Network (OSTI)

This paper deals with the thermal performances of roof-mounted radiant barriers. Using dynamic simulations of a mathematical model of a whole test cell including a radiant barrier installed between the roof top and the ceiling, the thermal performance of the roof is calculated. The mean method is more particularly used to assess the thermal resistance of the building component and lead to a value which is compared to the one obtained for a mass insulation product such as polyurethane foam. On a further stage, the thermal mathematical model is replaced by a thermo-aeraulic model which is used to evaluate the thermal resistance of the roof as a function of the airflow rate. The results shows a better performance of the roof in this new configuration, which is widely used in practice. Finally, the mathematical relation between the thermal resistance and the airflow rate is proposed.

Miranville, Frédéric; Lucas, Franck; Johan, Seriacaroupin

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

A Smart Window for Solar Energy Co-utilization  

Science Journals Connector (OSTI)

Aiming at thermal comfort and integrated to the building envelope, a low-emissivity, double-glazed window is presented, with adjustable blinds and spectrally selective heat reflection,...

Horowitz, Flavio; de Azambuja, Giovane; Pereira, Marcelo B

182

Integrated window systems: An advanced energy-efficient residential fenestration product  

SciTech Connect

The last several years have produced a wide variety of new window products aimed at reducing the energy impacts associated with residential windows. Improvements have focused on reducing the rate at which heat flows through the total window product by conduction/convection and thermal radiation (quantified by the U-factor) as well as in controlling solar heat gain (measured by the Solar Heat Gain Coefficient (SHGC) or Shading Coefficient (SC)). Significant improvements in window performance have been made with low-E coated glazings, gas fills in multiple pane windows and with changes in spacer and frame materials and designs. These improvements have been changes to existing design concepts. They have pushed the limits of the individual features and revealed weaknesses. The next generation of windows will have to incorporate new materials and ideas, like recessed night insulation, seasonal sun shades and structural window frames, into the design, manufacturing and construction process, to produce an integrated window system that will be an energy and comfort asset.

Arasteh, D.; Griffith, B.; LaBerge, P.

1994-03-01T23:59:59.000Z

183

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Measuring Performance: ENERGY STAR® Windows Measuring Performance: ENERGY STAR® Windows Windows for residential buildings are eligible for ENERGY STAR Most Efficient recognition in 2013. View the criteria for windows for the ENERGY STAR Most Efficient Program. Energy Star Most Efficient Program The Department of Energy (DOE) and the Environmental Protection Agency (EPA) have developed an ENERGY STAR exit disclaimer designation for products meeting certain energy performance criteria. Windows that have the ENERGY STAR designation will be labeled showing the zones in which it is qualified. Since energy efficient performance of windows, doors, and skylights varies by climate, product recommendations are given for four U.S. climate zones. For making comparisons among ENERGY STAR products, use the NFRC label or

184

Multipurpose characterization of glazing systems with silica aerogel: In-field experimental analysis of thermal-energy, lighting and acoustic performance  

Science Journals Connector (OSTI)

Abstract Thermal-energy, acoustic and lighting performance of innovative glazing systems with aerogel inclusion is evaluated through in-field experiments. The study is carried out by monitoring two dedicated prototype buildings located in central Italy, and the consistency of results with in-lab analyses is investigated. Analyses showed that aerogel can decrease energy consumption for heating by up to 50% in winter, and its capability to keep the thermal zone warmer even several days after that the heating system is switched off. Acoustic analyses confirmed in-lab measurements, showing aerogel capability to increase the façade acoustic insulation index by 3 dB. Lighting analyses showed aerogel effect to lower the daily average illuminance level by about 10% during sunny days. In cloudy weather conditions, with low level of solar radiation and indoor illuminance, the effect was relatively higher. In those cases when windows include shading elements such as protruding roof or deep window pad, aerogel effect was not clearly identified through continuous monitoring. The results of this integrated in-field experimental campaign showed that aerogel filled glazing cameras represent effective and innovative solutions for energy saving in winter, useful for improving acoustic façade performance with limited penalties in terms of daylighting.

Franco Cotana; Anna Laura Pisello; Elisa Moretti; Cinzia Buratti

2014-01-01T23:59:59.000Z

185

Experimental Study of Thermal Performance and the Contribution of Plant-Covered Walls to the Thermal Behavior of Building  

Science Journals Connector (OSTI)

Abstract This paper presented on experimental investigation of the influence of plant-covered wall on the thermal behavior of buildings in the semi-arid regions during the summer period. Thermal performance of a green walls system on facade walls has been experimentally investigated in a test room. The test cell dimensions are 1x1.2x0.8 m. In this study the thermal analysis concerns two test cells that incorporate non-covered and covered with two types of plants (Jasmine and Aristolochia). A Light source is used to simulate solar radiation. The results showed that plant cover improved indoor thermal comfort in both summer, and reduced heat gains and losses through the wall structure. It is verified that a microclimate between the wall of the test cell and the green wall is created, and it is characterized by slightly lower temperatures and higher relative humidity.

Saifi Nadia; Settou Noureddine; Necib Hichem; Damene Djamila

2013-01-01T23:59:59.000Z

186

End User Impacts of Automated Electrochromic Windows in a Pilot  

E-Print Network (OSTI)

LBNL-6027E End User Impacts of Automated Electrochromic Windows in a Pilot Retrofit Application E Electrochromic Windows in a Pilot Retrofit Application Eleanor S. Lee1 Abstract , Erin S. Claybaugh Building Independence Avenue, S.W., Washington, DC 20585 USA Automated electrochromic (EC) windows, advanced thermally

187

The harmonization of Canadian and U.S. window programs and standards. Impact on U-factor and SHGC of differences in simulation styles and assumptions  

SciTech Connect

The thermal performance of a window is currently characterized by the window`s thermal transmittance (U-factor) and its solar heat gain coefficient. The National Fenestration Rating Council (NFRC) has established a system for rating the thermal performance of windows. the U-factor is determined through computer simulation and validated with physical tests. The solar heat gain coefficient is determined for homogeneous products through computer simulation. Test methods exist for measuring solar heat gain through more complex products, although there is currently no standard. Under the NFRC`s rating program, a window must be simulated using the Window 4.1 and Frame 3.1 computer programs. There is some debate as to how accurately these computer programs simulate actual windows. This report addresses the differences in simulation styles and assumptions and what impact these differences have on the U-factor and solar heat gain coefficient. Section 2.0 covers center-of-glass modeling, section 3.0 covers spacer modeling, section 4.0 covers frame modeling, and section 5.0 concludes by weight the relative importance of the assumptions discussed. The focus of this research is on U-factor. For a more detailed study of solar heat gain coefficients refer to Wright (1995). This report also addresses the efficacy of various techniques, such as increasing glazing gap width or applying low-emittance coatings to interior glazing surfaces, at reducing total window U-factors.

NONE

1995-05-31T23:59:59.000Z

188

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Ensure Proper Installation of New Windows Ensure Proper Installation of New Windows Information Regarding Lead-based Hazards Comprehensive information about lead paint exit disclaimer by U.S. EPA Literature ASTM E 2112, "Standard Practice for Installation of Exterior Windows, Doors and Skylights." www.astm.org exit disclaimer Water Management Guide, Joseph W. Lstiburek, Energy & Environmental Building Association. www.eeba.org exit disclaimer Proper installation is necessary for optimal window performance, to ensure an airtight fit and avoid water leakage. Always follow manufacturers installation guidelines and use trained professionals for window installation. The Importance of Quality Window Installation Quite simply, windows are only as good as their installation. Proper installation will:

189

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Selection Process for New Windows Selection Process for New Windows What are the benefits of energy-efficient windows? Energy & Cost Savings Improved Comfort Less Condensation Increased Light & View Reduced Fading Lower HVAC Costs How is window performance measured? U-factor Solar Heat Gain Coefficient Visible Transmittance Air Leakage Condensation Resistance Are there financing and incentive programs? Overview of Utility and State Programs Building Codes Energy Rating Programs 1. Meet the Energy Code and Look for the ENERGY STAR® Windows must meet the locally applicable energy code requirements. Windows that are ENERGY STAR qualified typically meet or exceed energy code requirements. A home's climate and location determine the relative importance of heating and cooling energy use, the applicable building energy code requirements, and the qualification criteria for ENERGY STAR windows. ENERGY STAR

190

Thermal Performance and Reliability Characterization of Bonded Interface Materials (BIMs): Preprint  

SciTech Connect

Thermal interface materials are an important enabler for low thermal resistance and reliable electronics packaging for a wide array of applications. There is a trend towards bonded interface materials (BIMs) because of their potential for low thermal resistivity (< 1 mm2K/W). However, BIMs induce thermomechanical stresses in the package and can be prone to failures and integrity risks. Deteriorated interfaces can result in high thermal resistance in the package and degradation and/or failure of the electronics. DARPA's Thermal Management Technologies program has addressed this challenge, supporting the development of mechanically-compliant, low resistivity nano-thermal interface (NTI) materials. In this work, we describe the testing procedure and report the results of NREL's thermal performance and reliability characterization of an initial sample of four different NTI-BIMs.

DeVoto, D.; Paret, P.; Mihalic, M.; Narumanchi, S.; Bar-Cohen, A.; Matin, K.

2014-08-01T23:59:59.000Z

191

Enhanced performance of high temperature aluminate cementitious materials incorporated with Cu powders for thermal energy storage  

Science Journals Connector (OSTI)

Abstract Cementitious materials have been extensively developed in thermal energy storage system of solar thermal power. This paper deals with the volume heat capacity, thermal conductivity, thermal expansion coefficient, and compressive strength of aluminate cementitious thermal energy storage materials with the addition of metal Cu powders. The specimens were subjected to heat-treatment at 105, 350, and 900 °C, respectively. In the heating process, Cu powders gradually oxidized to Cu2O and CuO, providing a so-called mass compensation mechanism for the composite paste. Meanwhile, it indicates that volume heat capacity and thermal conductivity both increase with increasing Cu powders content and decrease with the rising temperature. The optimum thermal properties were obtained at 15 wt% Cu powders loading. In addition, Calorimetric Test, XRD, TG–DSC, and MIP are performed for characterizing the hydration rates, the phases, the mass/heat evolution, and the pore distribution, respectively.

Huiwen Yuan; Yu Shi; Chunhua Lu; Zhongzi Xu; Yaru Ni; Xianghui Lan

2015-01-01T23:59:59.000Z

192

Modeling, design and thermal performance of a BIPV/T system thermally coupled with a ventilated concrete slab in a low energy solar house: Part 1, BIPV/T system and house energy concept  

SciTech Connect

This paper is the first of two papers that describe the modeling, design, and performance assessment based on monitored data of a building-integrated photovoltaic-thermal (BIPV/T) system thermally coupled with a ventilated concrete slab (VCS) in a prefabricated, two-storey detached, low energy solar house. This house, with a design goal of near net-zero annual energy consumption, was constructed in 2007 in Eastman, Quebec, Canada - a cold climate area. Several novel solar technologies are integrated into the house and with passive solar design to reach this goal. An air-based open-loop BIPV/T system produces electricity and collects heat simultaneously. Building-integrated thermal mass is utilized both in passive and active forms. Distributed thermal mass in the direct gain area and relatively large south facing triple-glazed windows (about 9% of floor area) are employed to collect and store passive solar gains. An active thermal energy storage system (TES) stores part of the collected thermal energy from the BIPV/T system, thus reducing the energy consumption of the house ground source heat pump heating system. This paper focuses on the BIPV/T system and the integrated energy concept of the house. Monitored data indicate that the BIPV/T system has a typical efficiency of about 20% for thermal energy collection, and the annual space heating energy consumption of the house is about 5% of the national average. A thermal model of the BIPV/T system suitable for preliminary design and control of the airflow is developed and verified with monitored data. (author)

Chen, Yuxiang; Athienitis, A.K.; Galal, Khaled [Dept. of Building, Civil and Environmental Engineering, Concordia University, 1455 De Maisonneuve West, EV6.139, Montreal, Quebec (Canada)

2010-11-15T23:59:59.000Z

193

Modeling Process Characteristics and Performance of Fixed and Fluidized Bed Regenerative Thermal Oxidizer  

Science Journals Connector (OSTI)

Modeling Process Characteristics and Performance of Fixed and Fluidized Bed Regenerative Thermal Oxidizer ... (7)?Cheng, W.-H.; Chou, M.-S.; Lee, W.-S.; Huang, B.-J. Applications of Low-Temperature Regenerative Thermal Oxidizers to Treat Volatile Organic Compounds. ...

Pietropaolo Morrone; Francesco P. Di Maio; Alberto Di Renzo; Mario Amelio

2006-05-26T23:59:59.000Z

194

Abstract--Eventually, prediction of transformer thermal performance for dynamic loading will be made using models  

E-Print Network (OSTI)

1 Abstract--Eventually, prediction of transformer thermal performance for dynamic loading will be made using models distilled from measure data, rather than models derived from transformer heat for measuring the acceptability of transformer thermal models. For a model to be acceptable, it must have

195

PERFORMANCE EVALUATION OF PHOTOVOLTAIC CELL WITH AND WITHOUT THERMAL SINK  

E-Print Network (OSTI)

The following paper presents concisely the operation principles of photovoltaic cells and their main parameters. The efficiency of photovoltaic (PV) cell drop as their operating temperature increases especially under high insolation levels. The aim of the paper is to improve the performance of PV cell by dissipating excess heat, there by maintaining effective temperature of the cell which will enhance performance of the system. The work also deals with the comparing of the performance of PV cell with and without heat sink. During the study an optimum performance temperature was determined and heat sink mechanisms are used to maintain the determined temperature in PV cell.

Rob Res; Pramod N; K S Shashishekar; Pramod N; K S Shashishekar

196

The Efficient Window Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

5 5 The Efficient Window Collaborative http://www.efficientwindows.org Energy-efficient windows make up only about 35% of the U.S. residential window market, even though they are cost-effective in approximately 80% or more of all applications. To ensure that efficient windows reach their optimum potential in homes throughout the U.S., the Department of Energy and key players in the U.S. window industry have formed the Efficient Window Collaborative (EWC). The EWC's goal is doubling the market share of efficient windows by 2005. With 31 charter members from the window and glass industries, the EWC is managed jointly by the Washington, D.C.-based Alliance to Save Energy and the Center for Building Science's Windows and Daylighting Group. The EWC serves as a focal point for voluntary

197

Fluorinated Phosphazene Co-solvents for Improved Thermal and Safety Performance in Lithium-Ion Battery Electrolytes  

SciTech Connect

The safety of lithium-ion batteries is coming under increased scrutiny as they are being adopted for large format applications especially in the vehicle transportation industry and for grid-scale energy storage. The primary short-comings of lithium-ion batteries are the flammability of the liquid electrolyte and sensitivity to high voltage and elevated temperatures. We have synthesized a series of non-flammable fluorinated phosphazene liquids and blended them with conventional carbonate solvents. While the use of these phosphazenes as standalone electrolytes is highly desirable, they simply do not satisfy all of the many requirements that must be met such as high LiPF6 solubility and low viscosity, thus we have used them as additives and co-solvents in blends with typical carbonates. The physical and electrochemical properties of the electrolyte blends were characterized, and then the blends were used to build 2032-type coin cells which were evaluated at constant current cycling rates from C/10 to C/1. We have evaluated the performance of the electrolytes by determining the conductivity, viscosity, flash point, vapor pressure, thermal stability, electrochemical window, cell cycling data, and the ability to form solid electrolyte interphase (SEI) films. This paper presents our results on a series of chemically similar fluorinated cyclic phosphazene trimers, the FM series, which has exhibited numerous beneficial effects on battery performance, lifetimes, and safety aspects.

Harry W. Rollins; Mason K. Harrup; Eric J. Dufek; David K. Jamison; Sergiy V. Sazhin; Kevin L. Gering; Dayna L. Daubaras

2014-10-01T23:59:59.000Z

198

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Reduced Condensation Reduced Condensation Condensation High performance windows with new glazing technologies not only reduce energy costs but make homes more comfortable as well. High-performance windows create warmer interior glass surfaces, reducing frost and condensation. High-performance windows with warm edge technology and insulating frames have such a warm interior surface that condensation on any interior surfaces is significantly reduced under all conditions. Condensation occurs when the interior surface temperature of the glass drops below either the dewpoint or frost point. A window's frame and/or glazing system can contribute to the possibility of condensation if they are poor performers for a specific climate. High-performance windows create warmer interior glass surfaces, reducing condensation and frost.

199

The thermal performance of fixed and variable selective transmitters in commercial architecture  

E-Print Network (OSTI)

A parametric model is developed for use in evaluating the relative thermal and lighting performance of a variety of existing and proposed types of commercial glazing materials. The glazing materials considered are divided ...

Bartovics, William A

1984-01-01T23:59:59.000Z

200

Thermal mass performance in residential construction : an energy analysis using a cube model  

E-Print Network (OSTI)

Given the pervasiveness of energy efficiency concerns in the built environment, this research aims to answer key questions regarding the performance of thermal mass construction. The work presents the Cube Model, a simplified ...

Ledwith, Alison C. (Alison Catherine)

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Thermal Performance Characteristics of a Combined External Insulation System under Simulated Space Vehicle Operating Conditions  

Science Journals Connector (OSTI)

The main purpose of this investigation was to determine the long-term thermal performance characteristics, with liquid hydrogen, of an externally applied combined foam/multilayer insulation system under simulated...

F. J. Muller; P. L. Klevatt

1995-01-01T23:59:59.000Z

202

Predicting Battery Pack Thermal and Electrical Performance in a Vehicle Using Realistic Drive Cycle Power Profiles  

Science Journals Connector (OSTI)

The heat generated during battery charge and discharge cycles is a major ... issue, particularly since the performance of a battery depends on its operating temperature. As a consequence, robust thermal managemen...

Allen Curran; Scott Peck

2013-01-01T23:59:59.000Z

203

GBL-based electrolyte for Li-ion battery: thermal and electrochemical performance  

Science Journals Connector (OSTI)

Thermal stability, flammability, and electrochemical performances of...4] have been examined in comparison with contemporary (EC/EMC, 1:3 vol.%, 1 M LiPF6...) electrolyte by DSC, accelerating rate calorimetry (AR...

Dmitry Belov; Deng-Tswen Shieh

2012-02-01T23:59:59.000Z

204

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Design Guidance for Replacement Windows Design Guidance for Replacement Windows Opportunities for Design Improvements Energy-efficient windows offer benefits under diverse design conditions. Window performance can be improved by taking orientation, window area and shading into account. Fine-tuning your window selection to the houses conditions and optimizing these conditions where possible helps further cut heating and cooling demand. Besides long-term energy savings, these upfront opportunities may be available: Smaller HVAC equipment: Lower heating and cooling demand means optimum equipment is smaller and costs less. ENERGY STAR Homes recognition: High-performance design can allow homes to be recognized by the ENERGY STAR program. Many States and localities offer design help and/or incentives for ENERGY STAR homes.

205

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

The High Performance Windows Volume Purchase (WVP) Program The High Performance Windows Volume Purchase (WVP) Program The U.S. Department of Energy's Building Technologies Program (BTP) is coordinating a volume purchase program intended to overcome cost and awareness barriers to the wider adoption of highly-insulating windows and low-E storm windows. These products include windows meeting a number of specifications including a U-factor of 0.22 or less as well as storm windows with low-emissivity glass. Buyer groups with a potential interest in purchasing these products in volume will learn about their availability and cost through the program's product listings. Over 50 manufacturers proposed products for the first round of these listings, for which submittals were due by February 19, 2010. DOE does not purchase any products through this project, nor does DOE

206

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Design Guidance for New Windows Design Guidance for New Windows Opportunities for Design Improvements Energy-efficient windows offer benefits under diverse design conditions. Window performance can be improved by taking orientation, window area and shading into account. Fine-tuning your window selection to the houses conditions and optimizing these conditions where possible helps further cut heating and cooling demand. Besides long-term energy savings, these upfront opportunities may be available: Smaller HVAC equipment: Lower heating and cooling demand means optimum equipment is smaller and costs less. ENERGY STAR Homes recognition: High-performance design can allow homes to be recognized by the ENERGY STAR program. Many States and localities offer design help and/or incentives for ENERGY STAR homes.

207

Nanofluid \\{PCMs\\} for thermal energy storage: Latent heat reduction mechanisms and a numerical study of effective thermal storage performance  

Science Journals Connector (OSTI)

Abstract The latent heat of fusion of paraffin-based nanofluids has been examined to investigate the use of enhanced phase change materials (PCMs) for thermal energy storage (TES) applications. The nanofluid approach has often been exploited to enhance thermal conductivity of PCMs, but the effects of particle addition on other thermal properties affecting TES are relatively ignored. An experimental study of paraffin-based nanofluids containing various particle sizes of multi-walled carbon nanotubes has been conducted to investigate the effect of nanoparticles on latent heat of fusion. Results demonstrated that the magnitude of nanofluid latent heat reduction increases for smaller diameter particles in suspension. Three possible mechanisms – interfacial liquid layering, Brownian motion, and particle clustering – were examined to explain further reduction in latent heat, through the weakening of molecular bond structures. Although additional research is required to explore detailed mechanisms, experimental evidence suggests that interfacial liquid layering and Brownian motion cannot explain the degree of latent heat reduction observed. A finite element model is also presented as a method of quantifying nanofluid PCM energy storage performance. Thermal properties based on modified effective medium theory and an empirical relation for latent heat of fusion were applied as model parameters to determine energy stored and extracted over a given period of time. The model results show that while micro-scale particle inclusions exhibit some performance enhancement, nanoparticles in \\{PCMs\\} provide no significant improvement in TES performance. With smaller particles, the enhancement in thermal conductivity is not significant enough to overcome the reduction in latent heat of fusion, and less energy is stored over the PCM charge period. Therefore, the nanofluid approach may not be justifiable for energy storage applications. However, since the model parameters are dependent on the material properties of the system observed, storage performance may vary for differing nanofluid materials.

Aitor Zabalegui; Dhananjay Lokapur; Hohyun Lee

2014-01-01T23:59:59.000Z

208

Window annual energy rating systems: What they tell us about residential window design and selection  

SciTech Connect

Residential window annual energy rating systems have been developed in Canada and the US. These systems combine window properties of solar heat gain coefficient, U-factor, and air-infiltration into a single number representative of the energy performance for each of the heating season and the cooling season. These systems provide a simple means for designers to select the best energy performing window for low-rise residential buildings over the heating and cooling seasons. The two systems, which rank windows in the same order, give different information on optimum window design and selection than just a simple U-factor comparison. These systems show the importance of a high window SHGC in cold climates and a low SHGC in hot climates. The impact of window air infiltration is surprisingly small relative to the solar heat gain and heat conduction losses.

Carpenter, S.C.; McGowan, A.G.; Miller, S.R. [Enermodal Engineering Ltd., Kitchener, Ontario (Canada)

1998-12-31T23:59:59.000Z

209

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamic Windows Dynamic Windows Technologies, such as electrochromics, are now available for the residential market. The skylight on the left is switched to the "on" position-reducing glare and solar heat gain. The skylight on the right is switched to the "off" position. Photo: Velux-America and SAGE Electrochromics. The emerging concept for the window of the future is more as a multifunctional "appliance-in-the-wall" rather than simply a static piece of coated glass. These systems include switchable windows and shading systems that have variable optical and thermal properties that can be changed in response to climate and occupant preferences. By actively managing lighting and cooling, smart windows could reduce peak electric loads, increase daylighting benefits throughout the United States, improve

210

Experimental and Numerical Examination of the Thermal Transmittance of High  

NLE Websites -- All DOE Office Websites (Extended Search)

Experimental and Numerical Examination of the Thermal Transmittance of High Experimental and Numerical Examination of the Thermal Transmittance of High Performance Window Frames Title Experimental and Numerical Examination of the Thermal Transmittance of High Performance Window Frames Publication Type Conference Paper LBNL Report Number LBNL-3886E Year of Publication 2010 Authors Gustavsen, Arlid, Goce Talev, Dariush K. Arasteh, Howdy Goudey, Christian Kohler, Sivert Uvsløkk, and Bjørn Petter Jelle Conference Name Thermal Performance of the Exterior Envelopes of Whole Buildings XI International Conference Date Published Dec 5-9, 2010 Conference Location Clearwater Beach, FL Call Number LBNL-3886E Abstract While window frames typically represent 20-30% of the overall window area, their impact on the total window heat transfer rates may be much larger. This effect is even greater in low-conductance (highly insulating) windows which incorporate very low conductance glazings. Developing low-conductance window frames requires accurate simulation tools for product research and development.

211

Thermal performance prediction of a solar hybrid gas turbine  

Science Journals Connector (OSTI)

The present work focuses on a modelling procedure to simulate the operation of a solar hybrid gas turbine. The method is applied to a power generation system including an heliostat field, a receiver and a 36 MW commercial gas turbine. Heat is provided by concentrated solar power and integrated by fossil fuel. A detailed modelling of the gas turbine (GT) is proposed to predict the performance of commercial GT models in actual operating conditions. Advanced software tools were combined together to predict design and off-design performance of the whole system: TRNSYS® was used to model the solar field and the receiver while the gas turbine simulation was performed by means of Thermoflex®. A detailed comparison between the solarized and the conventional gas turbine is reported, taking into account GT electric power, efficiency and shaft speed. All thermodynamic parameters such pressure ratio, air flow and fuel consumption were compared. The main advantage of solarization is the fossil fuel saving, but it is balanced by a relevant penalty in power output and efficiency.

G. Barigozzi; G. Bonetti; G. Franchini; A. Perdichizzi; S. Ravelli

2012-01-01T23:59:59.000Z

212

Windows in the buildings of tomorrow: Energy losers or energy gainers?  

Science Journals Connector (OSTI)

One of the most effective actions for reduction of energy loss through the building envelope is to optimize the thermal performance, area and localization of the transparent components in the façade in order to obtain minimal heat losses and optimal solar gains. When considering the thermal performance of these transparent components, one should consider, not only heat loss (or gains) caused by thermal transmission, but also the beneficial effects of incident solar radiation and hence reduced demand for heating and artificial lighting. This study presents calculations for a range of windows as part of a building where the coupled effects of incident solar radiation and thermal transmission heat losses are accounted for in terms of a net energy balance for the various solutions. Effects of varying thermal transmittance values (U-values) are studied in connection with solar heat gain coefficients. Three different rating methods have been proposed and applied to assess the energy performance of several window configurations. It has been found that various rating methods give different energy saving potentials in terms of absolute figures. Furthermore, it has been found that windows, even with existing technology, might outperform an opaque wall in terms of heating and cooling demands.

Steinar Grynning; Arild Gustavsen; Berit Time; Bjørn Petter Jelle

2013-01-01T23:59:59.000Z

213

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Financing & Incentives Financing & Incentives Financing or incentive programs may be available to you if: You intend to replace old windows with high-performance, energy efficient windows. You plan to build a new home with windows that keep energy costs low and provide for a comfortable interior. If you are looking for utility programs within your state that can help you finance such an investment in efficient windows, download an overview of utility and state programs. Incentives and Rebates for Energy-Efficient Windows Offered through Utility and State Programs Utility and State Incentives We have provided an overview of utility and state programs that can help you as a resident, building owner, or builder to finance improvements in window energy efficiency. Download an overview of utility and state

214

LBNL Windows & Daylighting Software -- THERM Components  

NLE Websites -- All DOE Office Websites (Extended Search)

Components Components THERM has three basic components: Graphic User Interface: a graphic user interface that allows you to draw a cross section of the product or component for which you are performing thermal calculations. Heat Transfer Analysis: a heat-transfer analysis component that includes: an automatic mesh generator to create the elements for the finite-element analysis, a finite-element solver, an optional error estimator and adaptive mesh generator, and an optional view-factor radiation model. Results: a results displayer. Graphic User Interface THERM has standard graphic capabilities associated with the Microsoft Windows™ operating system. For example, THERM allows you to use: Both mouse and cursor operations; Standard editing features, such as Cut, Copy, Paste, Select All, and Delete;

215

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Fact Sheets & Publications: Books Fact Sheets & Publications: Books Residential Windows: A Guide to New Technology and Energy Performance Available from Norton Professional Books. exit disclaimer Single copy price: $35.00 USA; volume discounts available from publisher. Available from Amazon. exit disclaimer Window Systems for High-performance Buildings Available from Norton Professional Books. exit disclaimer Single copy price: $50.00 USA; volume discounts available from publisher. Available from Amazon. exit disclaimer Residential Windows: A Guide to New Technology and Energy Performance, 3rd Edition John Carmody, Stephen Selkowitz, Dariush Arasteh and Lisa Heschong Residential Windows The Department of Energy's Windows and Glazing Research Program supported the development of this book. Support was provided

216

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Lower HVAC Costs Lower HVAC Costs HVAC sizing tools Several computation procedures exist for proper sizing of HVAC equipment. The most prominent ones, which are also recommended by the ENERGY STAR Homes program, are ACCA Manual J exit disclaimer and the ASHRAE Handbook of Fundamentals. Factors to be considered: The energy performance of the windows themselves must be considered in load calculations. NFRC-certified window performance values significantly increase the accuracy of these calculations. Window orientation and overhangs must be taken into account. Overhangs are an important factor influencing solar gains through windows. Where internal shades and blinds will be actively used, these should also be accounted for in load calculations. High-performance windows not only provide reduced annual heating and

217

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Measuring Performance Measuring Performance What are the benefits of energy-efficient windows? Energy & Cost Savings Improved Comfort Less Condensation Increased Light & View Reduced Fading Lower HVAC Costs Looking for information on windows for a new house? Window Selection Tool Selection Process Design Guidance Installation Looking for information on replacement windows? Window Selection Tool Assessing Options Selection Process Design Guidance Installation U-factor The rate of heat loss is indicated in terms of the U-factor (U-value) of a window assembly. This section on U-factor describes what a U-factor is and it's importance in the heat loss through a window assembly. U-factor Solar Heat Gain Coefficient (SHGC) The SHGC is the fraction of incident solar radiation admitted through a window, both directly transmitted and absorbed and subsequently released inward. This section on Solar Heat Gain Coefficient describes what a SHGC is and it's importance in the amount of heat gain through a window assembly.

218

Thermal Insulation Performance in the Process Industries: Facts and Fallacies  

E-Print Network (OSTI)

toget~er with those of the pure zirconia and alumina fiJ)er pro ducts having intermediate densities. Itl can be seen that the performance of these new fine fiber blanket materials is equal to or better than that of the pure refractory oxide fiber...uminosilicate % Difference ?c 63* 136 70 142 67 141 67 140 200 0.055t 0.051 0.052 0.048 0.068 0.060 27.1 21.2 400 0.087 0.072 0.078 0.068 0.122 0.096 47.9 37.1 600 0.130 0.100 0.120 0.096 0.198 0.148 58.4 51.0 800 0.195 0.140 0.175 0.132 0.290 0.23 56...

Tye, R. P.

219

Thermal performance of an ammonia-water refrigeration system  

SciTech Connect

The conservation and efficient use of energy has led to alternate methods for air conditioning in buildings. Presently, two types of absorption air conditioning systems are widely used: the lithium-bromide-water system and the ammonia-water system. The first type is typically a water fired absorption chiller while the second one is a gas fired chiller. Some of the lithium-bromide-water systems use as a source of heat a stream of hot water supplied from solar collectors at a temperature level of the order of 95-100 {degrees}C. The purpose of this paper is to explore the possibilities to use solar energy to operate an ammonia-water system and to predict its thermodynamic performance. The results indicate that it is feasible to use solar energy to operate an ammonia-water absorption-refrigeration system.

Manrique, J.A. (Inst. Tecnologico y de Estudios Superiores de Monterrey, Dept. of Thermal Engineering, Monterrey, NL (MX))

1991-11-01T23:59:59.000Z

220

Apparatus for insulating windows and the like  

DOE Patents (OSTI)

Apparatus for insulating window openings through walls and the like includes a thermal shutter, a rail for mounting the shutter adjacent to the window opening and a coupling for connecting the shutter to the rail. The thermal shutter includes an insulated panel adhered to frame members which surround the periphery of the panel. The frame members include a hard portion for providing the frame and a soft portion for providing a seal with that portion of the wall adjacent to the periphery of the opening. The coupling means is preferably integral with the attachment rail. According to a preferred embodiment, the coupling means includes a continuous hinge of reduced thickness. The thermal shutter can be permanently attached, hinged, bi-folded, or sliding with respect to the window and wall. A distribution method is to market the apparatus in kit'' form. 11 figs.

Mitchell, R.A.

1984-06-19T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Apparatus for insulating windows and the like  

DOE Patents (OSTI)

Apparatus for insulating window openings through walls and the like includes a thermal shutter, a rail for mounting the shutter adjacent to the window opening and a coupling for connecting the shutter to the rail. The thermal shutter includes an insulated panel adhered to frame members which surround the periphery of the panel. The frame members include a hard portion for providing the frame and a soft portion for providing a seal with that portion of the wall adjacent to the periphery of the opening. The coupling means is preferably integral with the attachment rail. According to a preferred embodiment, the coupling means includes a continuous hinge of reduced thickness. The thermal shutter can be permanently attached, hinged, bi-folded, or sliding with respect to the window and wall. A distribution method is to market the apparatus in "kit" form.

Mitchell, Robert A. (R.D. #1, Box 462-A, Voorheesville, NY 12186)

1984-01-01T23:59:59.000Z

222

Advancement of Electrochromic Windows  

NLE Websites -- All DOE Office Websites (Extended Search)

Advancement of Electrochromic Windows Advancement of Electrochromic Windows Title Advancement of Electrochromic Windows Publication Type Report LBNL Report Number LBNL-59821 Year of Publication 2006 Authors Lee, Eleanor S., Stephen E. Selkowitz, Robert D. Clear, Dennis L. DiBartolomeo, Joseph H. Klems, Luis L. Fernandes, Gregory J. Ward, Vorapat Inkarojrit, and Mehry Yazdanian Date Published 04/2006 Other Numbers CEC-500-2006-052 Keywords commercial buildings, daylight, daylighting controls, Electrochromic windows, energy efficiency, human factors, peak demand, switchable windows, visual comfort Abstract This guide provides consumer-oriented information about switchable electrochromic (EC) windows. Electrochromic windows change tint with a small applied voltage, providing building owners and occupants with the option to have clear or tinted windows at any time, irrespective of whether it's sunny or cloudy. EC windows can be manually or automatically controlled based on daylight, solar heat gain, glare, view, energy-efficiency, peak electricity demand response, or other criteria. Window controls can be integrated with other building systems, such as lighting and heating/cooling mechanical systems, to optimize interior environmental conditions, occupant comfort, and energy-efficiency.

223

Numerical simulation of heat transfer performance of an air-cooled steam condenser in a thermal power plant  

Science Journals Connector (OSTI)

Numerical simulation of the thermal-flow characteristics and heat transfer performance is made of an air-cooled steam condenser (ACSC) in a thermal power plant by considering the effects of ambient wind speed and...

Xiufeng Gao; Chengwei Zhang; Jinjia Wei; Bo Yu

2009-09-01T23:59:59.000Z

224

Window, Door, and Skylight Products and Services | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Window, Door, and Skylight Products and Services Window, Door, and Skylight Products and Services Window, Door, and Skylight Products and Services June 18, 2012 - 8:33am Addthis Window, Door, and Skylight Products and Services Use the following links to get product information and locate professional services for windows, doors, and skylights. Product Information Awnings in Residential Buildings: The Impact on Energy Use and Peak Demand University of Minnesota Center for Sustainable Building Research Independently Tested and Certified Energy Performance ENERGY STAR® Information on ENERGY STAR performance ratings for windows, doors, and skylights. Product Ratings National Fenestration Rating Council Find energy performance ratings and manufacturers of windows, doors, and skylights. Residential Windows, Doors, and Skylights

225

Rolling, Rolling, Rolling: Roller Window Shades | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Rolling, Rolling, Rolling: Roller Window Shades Rolling, Rolling, Rolling: Roller Window Shades Rolling, Rolling, Rolling: Roller Window Shades March 15, 2010 - 11:42am Addthis John Lippert There's a lot of talk these days about installing new energy-efficient windows. Thanks to a Federal tax credit of up to $1,500, window advertisements, both print and radio and TV broadcasting, are aplenty. I don't want to knock energy-efficient windows. There are some great window products available. Some even rival the overall performance of walls, that is, if you account for the heat energy that enters the home via sunshine, depending on the climate and orientation. What I would like to talk about here are window shades. My wife and I bought our house 19 years ago. We are only the 2nd owners. The house has double-pane wooden windows made by a major well-known manufacturer. No

226

Rolling, Rolling, Rolling: Roller Window Shades | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Rolling, Rolling, Rolling: Roller Window Shades Rolling, Rolling, Rolling: Roller Window Shades Rolling, Rolling, Rolling: Roller Window Shades March 15, 2010 - 11:42am Addthis John Lippert There's a lot of talk these days about installing new energy-efficient windows. Thanks to a Federal tax credit of up to $1,500, window advertisements, both print and radio and TV broadcasting, are aplenty. I don't want to knock energy-efficient windows. There are some great window products available. Some even rival the overall performance of walls, that is, if you account for the heat energy that enters the home via sunshine, depending on the climate and orientation. What I would like to talk about here are window shades. My wife and I bought our house 19 years ago. We are only the 2nd owners. The house has double-pane wooden windows made by a major well-known manufacturer. No

227

The influence of condenser cooling seawater fouling on the thermal performance of a nuclear power plant  

Science Journals Connector (OSTI)

Abstract This study performs a thermodynamic analysis and energy balance to study the effect of fouling change on the thermal performance of the condenser and the thermal efficiency of a proposed nuclear power plant. The study is carried out on a pressurized water reactor nuclear power plant. The results of the study show that the increasing of fouling factor decreases the power output and the thermal efficiency of the nuclear power plant. The main results of this study is that the impact of an increase in the condenser cooling seawater fouling factor in the range 0.00015–0.00035 m2 K/W is led to a decrease in the plant output power and thermal efficiency of 1.36% and 0.448%, respectively. The present paper researches into a real practical factor that has significant negative effect on the thermal efficiency of the nuclear power plants, which is fouling of condenser cooling seawater. This is abundantly important since one of the top goals of new power stations are to increase their thermal efficiency, and to prevent or minimize the reasons that lead to loss of output power.

Said M.A. Ibrahim; Sami I. Attia

2015-01-01T23:59:59.000Z

228

Window industry technology roadmap  

SciTech Connect

Technology roadmap describing technology vision, barriers, and RD and D goals and strategies compiled by window industry stakeholders and government agencies.

Brandegee

2000-04-27T23:59:59.000Z

229

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

Optics 6.0 Optics 6.0 (6.0 -- February 13, 2012) Release Notes Updated: 07/16/12 Program Changes Microsoft Windows 7 / Vista Operating System"Aware" Optics now installs and operates much better under the Microsoft Windows 7 and Vista operating systems. It is no longer necessary to run the "VistaFix" batch file after installing the program. Fixed Bugs If you find bugs, or if you think these have not been fixed, please do not hesitate to send an email to OpticsHelp@lbl.gov to report your findings. Getting feedback from users is how we improve the program. Paths Appear in Tools/Options In the Microsoft Windows 7 / Vista Operating System environments, the program would not display the directory paths in the Tools / Options "File Locations" dialog box. This is now fixed.

230

Thermal performance of oil spray cooling system for in-wheel motor in electric vehicles  

Science Journals Connector (OSTI)

Abstract The cooling of the motor in an in-wheel system is critical to its performance and durability. In the present study, the shape of the channel in the hollow shaft for the oil spray cooling of a high-capacity 35 kW in-wheel motor was optimized, and the thermal performance of the motor was evaluated by numerical analysis and experiments. The thermal flow was analyzed by evaluating the thermal performance of two conventional cooling models of in-wheel motors under conditions of continuous rating base speed. For conventional model #1, in which the cooling oil is stagnant in the lower end of the motor, the maximum temperature of the coil was 221.7 °C. For conventional model #2, in which the cooling oil circulates through the exit and entrance of the housing and jig, the maximum temperature of the coil was 155.4 °C. Both models thus proved to be unsuitable for in-wheel motors because the motor control specifications limit the maximum temperature to 150 °C. We designed and manufactured an enhanced model for in-wheel motors, which we equipped with an optimized channel for the oil spray cooling mode, and evaluated its thermal performance under continuous rating conditions. The maximum temperatures of the coil at the base and maximum speeds, which were set as the design points, were below the motor temperature limit, being 138.1 and 137.8 °C, respectively.

Dong Hyun Lim; Sung Chul Kim

2014-01-01T23:59:59.000Z

231

Software Optimization for Performance, Energy, and Thermal Distribution: Initial Case Studies  

E-Print Network (OSTI)

of our time. Data center energy consumption is now 2-3% of total US electricity use and is increasing-level energy consumption. I. INTRODUCTION Energy efficiency is one of the central societal and technical issues- sired level of performance while reducing energy consumption. A closely related issue is thermal

Herbordt, Martin

232

The steady-state thermal-hydraulic performance of 3500 MWth metal and oxide fueled LMRs  

SciTech Connect

The thermal-hydraulic performance of a 3500 MWth metal and oxide fueled LMR is reported. Orifice zones are defined and coolant flowrates are given for use in safety analyses. The flux calculations were carried out in three-dimensional hexagonal-Z geometry using a finite differenced diffusion theory code. The heating calculations included the transport and deposition of gamma energy. The assembly temperature calculations were performed using a subchannel code.

Vilim, R.B.; Hill, R.N.

1989-03-01T23:59:59.000Z

233

A dynamic thermal performance model for flat-plate solar collectors based on the thermal inertia correction of the steady-state test method  

Science Journals Connector (OSTI)

Abstract In determining the dynamic thermal performance of a flat-plate solar collector, when the instantaneous solar irradiance changes sharply at one moment, most of the existing models cannot accurately predict the momentary thermal characteristics of outlet temperature and useful heat gain. In the present study, an analytical model in the form of series expansion is put forward to depict the momentary thermal characteristics of flat-plate solar collectors. The analytical model reveals that, instantaneous useful heat gain of a solar collector at one moment consists of the steady-state useful heat gain and corresponding thermal inertia correction. The model is then validated by the experimental data. It indicates that the analytical model can properly predict the dynamic thermal performance of the solar air collector. Besides, the model pertains to other types of solar thermal collectors, if they can be tested by the steady-state test method.

Jie Deng; Yupeng Xu; Xudong Yang

2015-01-01T23:59:59.000Z

234

Transforming the market for residential windows: design considerations for DOE's Efficient Window Collaborative  

SciTech Connect

Market adoption of recent, commercially available technological advances that improve the energy performance of windows will lead to immediate economic and energy savings benefits to the nation. This paper is a scoping study intended to inform the design of a major DOE initiative to accelerate market adoption of these windows in the residential sector. We describe the structure of the US residential window market and the interests of the various market players. We then briefly review five recent market transformation initiatives. Finally, we summarize our findings in a list of considerations we believe will be important for the DOE's initiative to transform the US residential window market.

Eto, J.; Arasteh, D.; Selkowitz, S.

1998-08-01T23:59:59.000Z

235

Performance of a Thermally Stable Polyaromatic Hydrocarbon in a Simulated Concentrating Solar Power Loop  

SciTech Connect

Polyaromatic hydrocarbon thermal fluids showing thermally stability to 600 C have been tested for solar thermal-power applications. Although static thermal tests showed promising results for 1-phenylnaphthalene, loop testing at temperatures to 450 C indicated that the fluid isomerized and degraded at a slow rate. In a loop with a temperature high enough to drive the isomerization, the higher melting point byproducts tended to condense onto cooler surfaces. So, as experienced in loop operation, eventually the internal channels of cooler components in trough solar electric generating systems, such as the waste heat rejection exchanger, may become coated or clogged affecting loop performance. Thus, pure 1-phenylnaphthalene, without addition of stabilizers, does not appear to be a fluid that would have a sufficiently long lifetime (years to decades) to be used in a loop at the temperatures greater than 500 C. The performance of a concentrating solar loop using high temperature fluids was modeled based on the National Renewable Laboratory Solar Advisory Model. It was determined that a solar-to-electricity efficiency of up to 30% and a capacity factor of near 60% could be achieved using a high efficiency collector and 12 h thermal energy storage.

McFarlane, Joanna [ORNL] [ORNL; Bell, Jason R [ORNL] [ORNL; Felde, David K [ORNL] [ORNL; Joseph III, Robert Anthony [ORNL] [ORNL; Qualls, A L [ORNL] [ORNL; Weaver, Samuel P [ORNL] [ORNL

2014-01-01T23:59:59.000Z

236

Highly Insulating Windows - Cost  

NLE Websites -- All DOE Office Websites (Extended Search)

Cost Cost The following is an estimate of the cost effective incremental cost of highly-insulating windows (U-factor=0.20 Btu/hr-ft2-F) compared to regular ENERGY STAR windows (U-factor 0.35 Btu/hr-ft2-F). Energy savings from lower U-factors were simulated with RESFEN over an assumed useful window life of 25 years. To determine the maximum incremental cost at which highly-insulating windows would still be cost-effective, we used a formula used by many utility companies to calculate the cost of saved energy from energy efficiency programs, based on the programs' cost and savings. We turned this formula around so that the cost of saved energy equals the present energy prices in the studied locations, whereas the program cost (the incremental cost of the windows) is the dependent variable. By entering 5%

237

Plasma window characterization  

SciTech Connect

Parameters of an arc Ar plasma discharge used as a plasma window with a discharge current of {approx}50 A and a voltage of {approx}58 V are presented. It is shown that this arc discharge allows one to decrease the pressure at the low pressure end of the plasma window almost 380 times using relatively low pumping at the low pressure end of the plasma window. Calculations of the plasma parameters and their spatial distribution using a simple wall-stabilized arc model showed a satisfactory agreement with the experimentally obtained data. It is shown that a significant decrease in gas flow through the plasma window occurs due to the increase in plasma viscosity. An improvement of the plasma window ignition and some of its design aspects are described as well.

Krasik, Ya. E.; Gleizer, S.; Gurovich, V.; Kronhaus, I.; Hershcovitch, A.; Nozar, P.; Taliani, C. [Physics Department, Technion, 32000 Haifa (Israel); Brookhaven National Laboratory, New York 11973-5000 (United States); Istituto per lo Studio dei Materiali Nanostrutturati, 40 129 Bologna (Italy)

2007-03-01T23:59:59.000Z

238

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Measuring Performance: Visible Transmittance (VT) Measuring Performance: Visible Transmittance (VT) How to maximize daylight? Historically, only clear glass was used to maximize the amount of light entering through a window. Especially in cooling-dominated climate, this desirable daylight also came with undesirable solar heat gain. With the advancement of high-performance glazing systems, it is possible for low-E coatings to reject the solar heat gain while allowing the visible light to pass through the glass. The type of low-E coating that is appropriate for your specific house depends on location, orientation, window area, and shading strategies. The visible transmittance (VT) is an optical property that indicates the fraction of visible light transmitted through the window. This is separate from the Solar Heat Gain Coefficient (SHGC), since many modern windows

239

Thermal performance upgrade of the Arkansas Nuclear One cooling tower: A ``root cause`` analysis approach  

SciTech Connect

The thermal performance efficiency of the natural draft cooling tower at Entergy Operations` 858 MWe Arkansas Nuclear One, Unit 2 was successfully upgraded to 101% of design performance capability in April 1994 as the end result of a unique root-cause analysis of the cooling tower`s long-standing performance deficiencies. Through application of state-of-the-art diagnostic testing methods and computer modeling techniques, Entergy was able to identify and correct air/water maldistribution problems in the 447 foot tall counterflow cooling tower at minimal cost. Entergy estimates that the savings realized, as a result of the 1.2 F reduction in cooling tower outlet water temperature, will pay for the thermal upgrade project in approximately 14 months.

Liffick, G.W. [Entergy Operations, Inc., Russellville, AR (United States); Cooper, J.W. Jr. [John Cooper and Associates, Tampa, FL (United States)

1995-10-01T23:59:59.000Z

240

Yankee hood performance studies; The effect of air balance on thermal efficiency  

SciTech Connect

With today's ever-increasing production rates on tissue-grade machines, many mills experience a need to increase the contribution of Yankee hoods to drying. Until the cylinder is replaced, its contribution to drying is fixed at its maximum drying rate. Consequently, the hoods should be checked routinely to ensure that they run optimally. Most air systems are not gas-or oil-fired, in contrast to the original steam-heated designs. As a result, Yankee air systems are energy intensive. A proper hood balance ensures minimum thermal consumption, or optimum thermal efficiency. Thermal efficiency is defined as the Btu's consumed by the burner per pound of water evaporated by hood. A simple engineering survey, or system examination, allows the papermaker to verify hood performance and balance the air system. In this paper typical data from a such a survey are shown. These surveys can often lead to considerably savings in burner fuel.

Schukov, V. (Yankee Air Systems (US)); Wozny, J. (Enerquin Air Inc., Montreal, Quebec (CA))

1991-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Windows, Doors, & Skylights | Department of Energy  

Energy Savers (EERE)

Logan Architects. Windows affect home aesthetics as well as energy use. Window Types A wood-frame window with insulated window glazing. | Photo courtesy of iStockphoto...

242

High temperature latent heat thermal energy storage: Phase change materials, design considerations and performance enhancement techniques  

Science Journals Connector (OSTI)

Abstract A very common problem in solar power generation plants and various other industrial processes is the existing gap between the period of thermal energy availability and its period of usage. This situation creates the need for an effective method by which excess heat can be stored for later use. Latent heat thermal energy storage is one of the most efficient ways of storing thermal energy through which the disparity between energy production or availability and consumption can be corrected, thus avoiding wastage and increasing the process efficiency. This paper reviews a series of phase change materials, mainly inorganic salt compositions and metallic alloys, which could potentially be used as storage media in a high temperature (above 300 °C) latent heat storage system, seeking to serve the reader as a comprehensive thermophysical properties database to facilitate the material selection task for high temperature applications. Widespread utilization of latent heat storage systems has been held back by the poor thermal conductivity and some other inherent drawbacks of the use of PCMs; this paper reviews several heat transfer and performance enhancement techniques proposed in the literature and discusses a number of design considerations that must be taken into account aiming to provide a broad overview for the design of high temperature latent heat based thermal energy storage systems.

Bruno Cárdenas; Noel León

2013-01-01T23:59:59.000Z

243

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Fact Sheets & Publications Fact Sheets & Publications Residential Windows: A Guide to New Technology and Energy Performance Available from Norton Professional Books. exit disclaimer Single copy price: $35.00 USA; volume discounts available from publisher. Available from Amazon. exit disclaimer Window Systems for High-performance Buildings Available from Norton Professional Books. exit disclaimer Single copy price: $50.00 USA; volume discounts available from publisher. Available from Amazon. exit disclaimer State Fact Sheets for New and Existing Construction The EWC State Fact Sheets provide a simple, portable step-by-step guide to selecting energy efficient windows considering the conditions in that state. Each one summarizes the key considerations found elsewhere on this site, and provides a summary of results from the Window Selection Tool for key cities in that state.

244

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Measuring Performance: ENERGY STAR® Most Efficient Program 2013 Measuring Performance: ENERGY STAR® Most Efficient Program 2013 Windows for residential buildings are eligible for ENERGY STAR Most Efficient recognition in 2013. The U.S. EPA will add qualifying models to the ENERGY STAR Most Efficient 2013 product list for windows from January 1, 2013 through December 31, 2013. The following products are not eligible for Most Efficient recognition in 2013: Windows for commercial buildings Doors Skylights Tubular Daylighting Devices Energy Star Most Efficient Program Energy Star Zones The ENERGY STAR Most Efficient designation recognizes the most efficient products among those that qualify for the ENERGY STAR. These exceptional products represent the leading edge in energy efficient products for a given year. Criteria Windows must be ENERGY STAR qualified consistent with applicable ENERGY

245

Subject Responses to Electrochromic Windows  

E-Print Network (OSTI)

Visual quality assessment of electrochromic and conventionalissues for large-area electrochromic windows in commercialOffice worker preferences of electrochromic windows: a pilot

Clear, Robert; Inkarojrit, Vorapat; Lee, Eleanor

2006-01-01T23:59:59.000Z

246

Windows and Building Envelope Facilities | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

of building energy performance and human factors (comfort, indoor environmental quality (IEQ), occupant satisfaction and acceptance of technologies) for emerging window...

247

CH7 Windows Introduction  

E-Print Network (OSTI)

4 Server · Account lockout security ­ Protection contre les attaques sur les mots de passe Windows NT 4 Server · Account lockout security ­ Protection contre les attaques sur les mots de passe

Collette. Sébastien

248

Zero Energy Windows  

E-Print Network (OSTI)

estimates of the U-factor and SHGC for today’s installedtoday's window stock U-factor and SHGC properties used thosepoint. U-factor and SHGC estimates vary by prototypical

Arasteh, Dariush; Selkowitz, Steve; Apte, Josh; LaFrance, Marc

2006-01-01T23:59:59.000Z

249

Window Daylighting Demo  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Window Daylighting Demo: Window Daylighting Demo: Accelerated Deployment of Daylighting and Shading Systems Stephen Selkowitz Lawrence Berkeley National Laboratory seselkowitz@lbl.gov 510-486-5064 April 4, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: * Façade has large energy impacts. Cooling and lighting average ~ 40% of energy use in commercial buildings and often >50% in peak electric demand. * Many glazing/shading/daylighting options exist, but selecting the "best" solution is

250

Window Daylighting Demo  

NLE Websites -- All DOE Office Websites (Extended Search)

Window Daylighting Demo: Window Daylighting Demo: Accelerated Deployment of Daylighting and Shading Systems Stephen Selkowitz Lawrence Berkeley National Laboratory seselkowitz@lbl.gov 510-486-5064 April 4, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: * Façade has large energy impacts. Cooling and lighting average ~ 40% of energy use in commercial buildings and often >50% in peak electric demand. * Many glazing/shading/daylighting options exist, but selecting the "best" solution is

251

Simulation and study of thermal performance of liquid desiccant cooling cycle configurations  

E-Print Network (OSTI)

fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by: $ g(Beg~ 'i:1. ;, "?i C. F. K ttleborough (Chair of Committee) W. He n t (Member), H. Juvka -Wold (Member) G. P. Peterson (Head of Department...) May 1995 Major Subject. Mechanical Engineering ABSTRACT Simulation and Study of Thermal Performance of Liquid Desiccant Cooling Cycle Configurations. (May 1995) Rajesh Dhir, B. S. , Poona University, India Chair of Advisory Committee: Dr. C. F...

Dhir, Rajesh

2012-06-07T23:59:59.000Z

252

Short time scale thermal mechanical shock wave propagation in high performance microelectronic packaging configuration  

E-Print Network (OSTI)

SHORT TIME SCALE THERMAL MECHANICAL SHOCK WAVE PROPAGATION IN HIGH PERFORMANCE MICROELECTRONIC PACKAGING CONFIGURATION A Thesis by MAHAVIR NAGARAJ Submitted to the Office of Graduate Studies of Texas A&M University... MICROELECTRONIC PACKAGING CONFIGURATION A Thesis by MAHAVIR NAGARAJ Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by: Chii...

Nagaraj, Mahavir

2004-11-15T23:59:59.000Z

253

Thermal performance testing of two Thales 9310 pulse-tube cryocoolers for PHyTIR  

SciTech Connect

PHyTIR is a NASA-funded technology demonstration for a near-term earth-observing instrument in the thermal infrared spectrum, intended for use in the HyspIRI mission. PHyTIR will use two Thales 9310 single-stage pulse tube cryocoolers, one to directly cool the FPA, the other to simulate a passive radiator. We report performance measurements for the two Thales 9310 cryocoolers intended for inclusion in the PHyTIR demonstrator.

Paine, Christopher G. [Jet Propulsion Laboratory, California Institute of Technology 4800 Oak Grove Drive, Pasadena CA 91109 (United States)

2014-01-29T23:59:59.000Z

254

SUPERGLASS. Engineering field tests - Phase 3. Production, market planning, and product evaluation for a high-thermal-performance insulating glass design utilizing HEAT MIRROR transparent insulation. Final report  

SciTech Connect

HEAT MIRROR transparent window insulation consists of a clear polyester film two mils (.002'') thick with a thin, clear low-emissivity (.15) coating deposited on one side by state-of-the-art vacuum deposition processes. This neutral-colored invisible coating reflects long-wave infrared energy (heat). When mounted by being stretched with a 1/2'' air-gap on each side of the film, the resulting unit reduces heat loss by 60% compared to dual insulating glass. Southwall Corporation produces HEAT MIRROR transparent insulation and markets it to manufacturers of sealed insulating glass (I.G.) units and window and building manufacturers who make their own I.G. These companies build and sell the SUPERGLASS sealed glazing units. Units made and installed in buildings by six customers were visited. These units were located in many geographic regions, including the Pacific Northwest, Rocky Mountains, New England, Southeast, and West Coast. As much as could be obtained of their history was recorded, as was their current condition and performance. These units had been in place from two weeks to over a year. All of the units were performing thermally very well, as measured by taking temperature profiles through them and through adjacent conventional I.G. units. Some units had minor visual defects (attributed to I.G. assembly techniques) which are discussed in detail. Overall occupant acceptance was enthusiastically positive. In addition to saving energy, without compromise of optical quality or appearance, the product makes rooms with large glazing areas comfortable to be in in cold weather. All defects observed were present when built; there appears to be no in-field degradation of quality at this time.

Tilford, C L

1982-11-01T23:59:59.000Z

255

Evaluation on energy and thermal performance for office building envelope in different climate zones of China  

Science Journals Connector (OSTI)

Abstract Effective evaluation on the thermal performance of envelope plays an important role towards the reduction of energy consumption for space cooling and heating. In order to calculate the energy consumption for cooling and heating and assess the whole energy efficiency of envelop designs, a new evaluation index on energy and thermal performance for office building envelop (EETPO) is put forward. Three cities of Shenyang, Wuhan and Guangzhou in China are selected for EETPO analysis, which represent the cold zone, hot summer cold winter zone and hot summer warm winter zone, respectively. The regression equations between EETPO and energy use for cooling/heating are studied in three cities, illustrations indicate that the regression lines fit extremely well and the algorithm is accurate and simple. According to the compulsory indices stipulated by standard (GB50189-2005), the maximum allowable values of EETPO are determined in three cities, the maximum \\{EETPOc\\} in cooling period is 1.750 W/m3 K in Wuhan and 1.733 W/m3 K in Guangzhou, the maximum \\{EETPOh\\} in heating period is 0.200 W/m3 K in Shenyang and 0.414 W/m3 K in Wuhan. This index and energy use calculation method can help designers to evaluate the whole energy and thermal performance of the proposed envelopes and analyze energy saving effects for different energy conservation measures.

Jinghua Yu; Liwei Tian; Xinhua Xu; Jinbo Wang

2015-01-01T23:59:59.000Z

256

Storm Windows | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Storm Windows Storm Windows Storm Windows June 18, 2012 - 8:20am Addthis An energy upgrade on this daycare center included interior storm windows because most of the windows are on the north elevation. | Photo courtesy of Larry Kinney, Synergistic Building Technologies. An energy upgrade on this daycare center included interior storm windows because most of the windows are on the north elevation. | Photo courtesy of Larry Kinney, Synergistic Building Technologies. Interior storm windows improved the energy efficiency of a daycare center with windows on the north elevation. | Photo courtesy of Larry Kinney, Synergistic Building Technologies. Interior storm windows improved the energy efficiency of a daycare center with windows on the north elevation. | Photo courtesy of Larry Kinney,

257

Storm Windows | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Storm Windows Storm Windows Storm Windows June 18, 2012 - 8:20am Addthis An energy upgrade on this daycare center included interior storm windows because most of the windows are on the north elevation. | Photo courtesy of Larry Kinney, Synergistic Building Technologies. An energy upgrade on this daycare center included interior storm windows because most of the windows are on the north elevation. | Photo courtesy of Larry Kinney, Synergistic Building Technologies. Interior storm windows improved the energy efficiency of a daycare center with windows on the north elevation. | Photo courtesy of Larry Kinney, Synergistic Building Technologies. Interior storm windows improved the energy efficiency of a daycare center with windows on the north elevation. | Photo courtesy of Larry Kinney,

258

Theoretical and Experimental Thermal Performance Analysis of Complex Thermal Storage Membrane Containing Bio-Based Phase Change Material (PCM)  

SciTech Connect

Since 2000, an ORNL research team has been testing different configurations of PCM-enhanced building envelop components to be used in residential and commercial buildings. During 2009, a novel type of thermal storage membrane was evaluated for building envelope applications. Bio-based PCM was encapsulated between two layers of heavy-duty plastic film forming a complex array of small PCM cells. Today, a large group of PCM products are packaged in such complex PCM containers or foils containing arrays of PCM pouches of different shapes and sizes. The transient characteristics of PCM-enhanced building envelope materials depend on the quality and amount of PCM, which is very often difficult to estimate because of the complex geometry of many PCM heat sinks. The only widely used small-scale analysis method used to evaluate the dynamic characteristics of PCM-enhanced building products is the differential scanning calorimeter (DSC). Unfortunately, this method requires relatively uniform, and very small, specimens of the material. However, in numerous building thermal storage applications, PCM products are not uniformly distributed across the surface area, making the results of traditional DSC measurements unrealistic for these products. In addition, most of the PCM-enhanced building products contain blends of PCM with fire retardants and chemical stabilizers. This combination of non-uniform distribution and non-homogenous composition make it nearly impossible to select a representative small specimen suitable for DSC tests. Recognizing these DSC limitations, ORNL developed a new methodology for performing dynamic heat flow analysis of complex PCM-enhanced building materials. An experimental analytical protocol to analyze the dynamic characteristics of PCM thermal storage makes use of larger specimens in a conventional heat-flow meter apparatus, and combines these experimental measurements with three-dimensional (3-D) finite-difference modeling and whole building energy simulations. Based on these dynamic tests and modeling, ORNL researchers then developed a simplified one-dimensional (1-D) model of the PCM-enhanced building component that can be easily used in whole-building simulations. This paper describes this experimental-analytical methodology as used in the analysis of an insulation assembly containing a complex array of PCM pouches. Based on the presented short example of whole building energy analysis, this paper describes step-by-step how energy simulation results can be used for optimization of PCM-enhanced building envelopes. Limited results of whole building energy simulations using the EnergyPlus program are presented as well.

Kosny, Jan [ORNL; Stovall, Therese K [ORNL; Shrestha, Som S [ORNL; Yarbrough, David W [ORNL

2010-12-01T23:59:59.000Z

259

LBNL Windows & Daylighting Software -- WINDOW5.02: Feature List  

NLE Websites -- All DOE Office Websites (Extended Search)

System Non-Convergence System Non-Convergence Last update:05/19/08 05:03 PM There are some circumstances where WINDOW 5 will give the following error message: This error can occur either in the Window or Glazing System calculation, but it is actually an error that occurs when the program tries to calculate the glazing system thermal properties -- it occurs in the Window Library because the program recalculates the center-of-glass U-value based on the window height. It will happen in rare circumstances because of a problem with the discontinuity in correlations that calculate convective heat transfer in glazing cavities. The solution is to change either the glazing system height or width. In general, the most practical solution is to change the glazing system height rather than the width..

260

Numerical evaluation of the energetic performances of structured and random packed beds in regenerative thermal oxidizers  

Science Journals Connector (OSTI)

Regenerative thermal oxidizers (RTO) can be conveniently used to control volatile organic components (VOC) emissions, because of their thermal efficiency and cost effectiveness. In the RTO technology, beds of inert material are used in order to heat the polluted air by cooling burnt gases, through a sequence of cyclic operations which cut the fuel requirements. A computational 1D unsteady model, able to account for both structured and random packed bed regenerators, is developed and applied to realistic plant conditions. Process thermal efficiency and gas pressure drop are calculated as functions of the system geometry and operating parameters. The code can be usefully employed in the analysis and design of RTO systems and in order to choose the more suitable type of regenerator, structured or random packed bed (even considering various particle shapes). Energetic performances of both random and structured regenerators were compared, showing that the first ones exhibit a little higher thermal efficiency but also an elevated pressure drop, at a same value of exchange surface per unit volume of the bed. Random packed bed regenerators resulted less attractive from the energetic point of view and their usage is advisable if their lower cost satisfy economical requirements.

Mario Amelio; Pietropaolo Morrone

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Performance analysis of an absorption power cycle for ocean thermal energy conversion  

Science Journals Connector (OSTI)

Abstract An absorption power cycle with two ejectors is proposed for ocean thermal energy conversion. The ammonia–water is used as the working fluid. The ejectors are driven by vapor and solution from the sub-generator. Based on the first and second law, the mathematical model for this cycle is developed and theoretical analysis is conducted to evaluate the effects of thermodynamic parameters on the performance of this cycle. Results show that the absorption temperature is increased by 2.0–6.5 °C by employing the two-stage ejector sub-cycle, which indicates that this proposed cycle can be driven with a lower temperature difference. Further, the thermal efficiency, net thermal efficiency and exergy efficiency of this cycle can reach to 4.17%, 3.10% and 39.92% respectively. Besides, the generation pressure, the heating source temperature, the solution concentration, and the expansion ratio, as well as the entrainment ratio of the first stage ejector have significant effects on the absorption temperature, the thermal efficiency, the exergy efficiency and the exergy loss of this cycle. In addition, 49.80% of exergy loss in this proposed cycle occurs in the generators and reheater, followed by the ejectors of 36.12%.

Han Yuan; Ning Mei; Peilin Zhou

2014-01-01T23:59:59.000Z

262

Thermal Processing Techniques to Improve Metal Sulfide Mixed Alcohol Catalyst Performance  

SciTech Connect

Research over several decades by several institutions has shown that alkali-promoted metal sulfide catalysts are capable of producing mixed alcohols from syngas with high selectivity and yield. Unfortunately, process models suggest that syngas to mixed alcohol processes, and especially thermochemical biomass to mixed alcohol processes, require improvements to sulfide catalyst activity and/or selectivity for acceptable economics. These improvements, if incremental, cannot result in increased process complexity, capital expenditure, or catalyst costs. It is well accepted among catalyst researchers that thermal processing techniques like calcining and reduction can have profound effects on the properties and performance of finished catalysts, and that small variations in thermal processing do not usually affect the overall cost of the catalyst. Metal sulfide catalysts are no exception but surprisingly, little attention has been given to the effects of thermal treatment on bulk metal sulfide mixed alcohol catalysts. This presentation will discuss how parameters like temperature, dwell time, metal ratios, and purge gas affect the performance and physical properties of K-Co/Mo catalysts.

Hensley, J.; Menart, M.; Costelow, K.; Thibodeaux, J.; Yung, M.

2011-01-01T23:59:59.000Z

263

ZeroEnergyWindow_1031.indd  

NLE Websites -- All DOE Office Websites (Extended Search)

Background and Performance Objective Background and Performance Objective Zero Energy Window Prototype HIGH PERFORMANCE WINDOW OF THE FUTURE T of 0.35 - 0.5 BTU/h-ft 2 -F to levels of 0.1 - 0.15 BTU/h-ft 2 -F. At the same time, the strategy for optimal control of solar gain varies with season and climate in the U.S. Rather than argue over a high or low solar heat gain coefficient (SHGC), the year-round, all-climate solution is a variable SHGC that can

264

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Glass Glass Vacuum-insulated Glass Vacuum-insulated glazing units are made up of 2 panes of glass with a very small air space. The air space contains spacers which help maintain the separation between the panes. Most of the emerging glass technologies are available or nearly on the market. These include insulation-filled and evacuated glazings to improve heat transfer by lowering U-factors. Evacuated Windows The most thermally efficient gas fill would be no gas at all-a vacuum. The window industry is pursuing the development of vacuum-insulated glass (VIG) for use in window units in which the space between the panes is evacuated. If the vacuum pressure is low enough, there would be no conductive or convective heat exchange between the panes of glass, thus lowering the U-factor. A vacuum glazing must have a good low-E coating to

265

Thermal Performance of Exterior Insulation and Finish Systems Containing Vacuum Insulation Panels  

SciTech Connect

A high-performance wall system is under development to improve wall thermal performance to a level of U-factor of 0.19 W/(m2 K) (R-30 [h ft2 F]/Btu) in a standard wall thickness by incorporating vacuum insulation panels (VIPs) into an exterior insulation finish system (EIFS). Such a system would be applicable to new construction and will offer a solution to more challenging retrofit situations as well. Multiple design options were considered to balance the need to protect theVIPs during construction and building operation, while minimizing heat transfer through the wall system. The results reported here encompass an indepth assessment of potential system performances including thermal modeling, detailed laboratory measurements under controlled conditions on the component, and system levels according to ASTM C518 (ASTM 2010). The results demonstrate the importance of maximizing the VIP coverage over the wall face. The results also reveal the impact of both the design and execution of system details, such as the joints between adjacent VIPs. The test results include an explicit modeled evaluation of the system performance in a clear wall.

Childs, Kenneth W [ORNL; Stovall, Therese K [ORNL; Biswas, Kaushik [ORNL; Carbary, Lawrence D [Dow Corning Corporation, Midland, MI

2013-01-01T23:59:59.000Z

266

Monitoring building energy consumption, thermal performance, and indoor air quality in a cold climate region  

Science Journals Connector (OSTI)

Abstract Buildings are major consumers of the world's energy. Optimizing energy consumption of buildings during operation can significantly reduce their impact on the global environment. Monitoring the energy usage and performance is expected to aid in reducing the energy consumption of occupants. In this regard, this paper describes a framework for sensor-based monitoring of energy performance of buildings under occupancy. Different types of sensors are installed at different locations in 12 apartment units in a building in Fort McMurray, Alberta, Canada to assess occupant energy usage, thermal performance of the building envelope, and indoor air quality (IAQ). The relationship between heating energy consumption and the thermal performance of building envelope and occupant comfort level is investigated by analyzing the monitoring data. The results show that the extent of heat loss, occupant comfort level, and appliance usage patterns have significant impacts on heating energy and electricity consumption. This study also identifies the factors influencing the poor IAQ observed in some case-study units. In the long term, it is expected that the extracted information acquired from the monitoring system can be used to support intelligent decisions to save energy, and can be implemented by the building management system to achieve financial, environmental, and health benefits.

Tanzia Sharmin; Mustafa Gül; Xinming Li; Veselin Ganev; Ioanis Nikolaidis; Mohamed Al-Hussein

2014-01-01T23:59:59.000Z

267

Thermal contact algorithms in SIERRA mechanics : mathematical background, numerical verification, and evaluation of performance.  

SciTech Connect

We examine algorithms for the finite element approximation of thermal contact models. We focus on the implementation of thermal contact algorithms in SIERRA Mechanics. Following the mathematical formulation of models for tied contact and resistance contact, we present three numerical algorithms: (1) the multi-point constraint (MPC) algorithm, (2) a resistance algorithm, and (3) a new generalized algorithm. We compare and contrast both the correctness and performance of the algorithms in three test problems. We tabulate the convergence rates of global norms of the temperature solution on sequentially refined meshes. We present the results of a parameter study of the effect of contact search tolerances. We outline best practices in using the software for predictive simulations, and suggest future improvements to the implementation.

Copps, Kevin D.; Carnes, Brian R.

2008-04-01T23:59:59.000Z

268

Experimental performances of a battery thermal management system using a phase change material  

Science Journals Connector (OSTI)

Abstract Li-ion batteries are leading candidates for mobility because electric vehicles (EV) are an environmentally friendly mean of transport. With age, Li-ion cells show a more resistive behavior leading to extra heat generation. Another kind of problem called thermal runway arises when the cell is too hot, what happens in case of overcharge or short circuit. In order to evaluate the effect of these defects at the whole battery scale, an air-cooled battery module was built and tested, using electrical heaters instead of real cells for safety reasons. A battery thermal management system based on a phase change material is developed in that study. This passive system is coupled with an active liquid cooling system in order to initialize the battery temperature at the melting of the PCM. This initialization, or PCM solidification, can be performed during a charge for example, in other words when the energy from the network is available.

Charles-Victor Hémery; Franck Pra; Jean-François Robin; Philippe Marty

2014-01-01T23:59:59.000Z

269

Thermal evaluation and performance of high-power Lithium-ion cells  

SciTech Connect

Under the sponsorship of the US Advanced Battery Consortium (USABC) and the Partnership for a New Generation of Vehicles (PNGV), Saft has developed high-power lithium-ion (Li-Ion) batteries for hybrid electric vehicles (HEVs). These high-power Li-Ion batteries are being evaluated for the US Department of Energy's (DOE) Hybrid Vehicle Propulsion Program. As part of this program, the National Renewable Energy Laboratory (NREL) characterized the thermal performance of the Saft (6-Ah) Li-Ion cells. The characterization included (1) obtaining thermal images of cells under a specified cycle, (2) measuring heat generation from the cells at various temperatures and under various charge/discharge profiles, and (3) determining the cells' capabilities for following a simulated power profile (driving cycle) at various initial states of charge and temperatures.

Keyser, M.; Pesaran, A.; Oweis, S.; Chagnon, G.; Ashtiani, C.

2000-01-25T23:59:59.000Z

270

High Performance Building Facade Solutions PIER Final Project Report  

E-Print Network (OSTI)

Subject responses to electrochromic windows. Energy andhttp://windows.lbl.gov/comm_perf/Electrochromic/refs/LBNL_energy performance of electrochromic windows controlled for

Lee, Eleanor

2011-01-01T23:59:59.000Z

271

Battery life and performance depend strongly on temperature; thus there exists a need for thermal conditioning in plug-in  

E-Print Network (OSTI)

battery life depends on the design of thermal management used as well as the specific battery chemistry of Thermal Management on Battery Life 2012-01-0671 Published 04/16/2012 Tugce Yuksel and Jeremy MichalekABSTRACT Battery life and performance depend strongly on temperature; thus there exists a need

Michalek, Jeremy J.

272

Movable insulation. A guide to reducing heating and cooling losses through the windows in your home  

SciTech Connect

A typical house loses 25 to 30% of its heat through windows, and a house with large windows may lose as much as 50%. Numerous movable-insulation systems that will cut the heat loss through windows in half are described. Chapters are: The Energy-Responsive Dwelling, Past to Present; Window Heat Losses and Gains; Enhanced Glazing Systems; Choosing a Window-Insulation Design for Your Home; Pop-In Shutters; Thermal Curtains - Blankets that Fold; Thermal Shades - Blankets that Roll; Thermal Shutters and Folding Screens; Insulation Between Glazing and Interior Louvers; Exterior Hinged and Sliding Shutters; Sun-Shading Screens; Exterior Roll Shutters; Shutters for Skylights; Shutters for Clerestory Windows; Interior Greenhouse Insulation Systems; Exterior Insulation for Greenhouses; Movable Insulation to Assist Passive Space Heating; and Movable Insulation to Assist Solar Water Heaters. Appendices include the following: insulated shade and shutter construction; the economics of window insulation; movable insulation products, hardware, and components; further technical information; and design sources. (MCW)

Langdon, W.K.

1980-01-01T23:59:59.000Z

273

Effect of gaps on the performance of the vertically installed wet thermal insulator  

SciTech Connect

In SMART, the main flow path of the reactor coolant and the pressurizer partially share common walls in the reactor coolant system. To reduce this heat transfer, the wet thermal insulator (WTI) is installed on the inner wall of the pressurizer. The WTI is constituted of stacked thin stainless steel plates. The water layer width between the plates is chosen to suppress natural convection in each layer. The plates of the WTI require clearance for thermal expansion. When the WTI is installed on a vertical wall, this clearance might cause gaps at the top and bottom at the operating condition. In this study, we focused on the effect of gaps at the both ends on the WTI performance. A numerical simulation was conducted for an 8-layer WTI with gaps at the both ends. To compare with this, a simulation of a WTI without a gap, which is an ideal case, was also conducted. The simulation was conducted in a 2-dimensional manner by a commercial computational fluid dynamics code, FLUENT. The simulations showed that the WTI thermal performance was substantially decreased by a flow that circulated through the top and bottom gaps and water layers at the sides of the WTI. This circulation caused a high temperature difference between the wall and the circulating flow. To find a way to prevent this performance deterioration of the WTI we simulated several cases with the smaller gap heights. However, the flow circulation and the higher heat transfer rate were still observed even at a case with the smallest gap, which seems to be hardly achievable in a real installation. Another way of reducing the flow circulation was suggested and also simulated in this study. (authors)

Kim, S. H.; Kim, Y. I.; Park, C. T.; Choi, S.; Yoon, J. [Korea Atomic Energy Research Inst., Daeduk-daero 989-111, Yuseong-Gu, Daejeon, 305-353 (Korea, Republic of)

2012-07-01T23:59:59.000Z

274

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

2 2 (7.2.29 -- December 29 2013) Release Notes Updated: 12/29/13 If you find bugs, or have comments about this version, please do not hesitate to send an email to WINDOWHelp@lbl.gov to report your findings. Getting feedback from users is how we improve the program. WINDOW 7.2.29 (December 29, 2013) Program Changes Glazing System Shading System Details For shading system in a Glazing System Library construction, the emittances, conductance and TIR are not displayed, as they are only available after a calculation has been completed. Perforated Screens An input value for "Effective Openness Factor" has been added to the Shading Layer Library for perforated screens. At a future date, we will update the program to calculate this value automatically.

275

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

Deflection Modeling Deflection Modeling It is now possible to model the effects of glass deflection in WINDOW 7. Glazing System Library The Glazing System Library is where the deflection modeling input values are entered. When the "Model Deflection" box is checked, a Deflection input box appears. When the Glazing System is calculated, two rows of results, one for the undeflected state and one for the deflected state, appear for Center of Glass Results, Temperature Data and Angular data. In addition, a Deflection tab appears, which shows the deflection of each glass layer and the resulting gap width for each gap. Glazing System Deflect Input There are two options for defining the deflection in a glazing system, by choosing from the "Input" pulldown list:

276

Thermal design and preliminary performance evaluation of the cooling system for BaR-SPOrt  

Science Journals Connector (OSTI)

BaR-SPOrt is an experiment to measure the linearly polarized emission of 20°×20° sky patches at 32 GHz and 90 GHz from a stratospheric balloon. It consists of correlation polarimeters for direct measurements of the Q and U Stokes parameters coupled to an optics providing a beam of 0°.5 (32 GHz) and 0°.2 (90 GHz). Its aim is the study of the polarization of the Diffused Galactic Background as well as the Cosmic Microwave Background Radiation (CMBR). The instrument thermal design and the preliminary performance evaluation of the cooling system are described.

C. Macculi; M. Zannoni

2002-01-01T23:59:59.000Z

277

Residential Windows and Window Coverings: A Detailed View of the Installed Base and User Behavior  

Energy.gov (U.S. Department of Energy (DOE))

Includes information about the installed base of residential windows and window coverings, and the operation of window coverings by households.

278

Effect of Climates and Building Materials on House Wall Thermal Performance  

Science Journals Connector (OSTI)

The residential housing sectors consume a large amount of fossil fuel energy. Hence the sector is responsible for huge amount of greenhouse gas emission to the atmosphere. Most energy used in the residential housing sector is mainly for space heating and cooling. In order to reduce the energy consumption in the housing sector, energy smart house wall system is required to develop. It is difficult to achieve higher thermal efficiency by using current building wall systems with their construction materials and methods. Although some studies on different aspects of residential housing were reported in the open literature, scant information is available on energy smart house wall systems for the main stream housing. Therefore, the primary objective of this study is to investigate several new house wall systems using various construction materials in order achieve higher thermal efficiency for ongoing heating and cooling. Thermal energy performance modeling was undertaken for two current and four new house wall systems for varied climate conditions across Australia. The findings revealed that at new house wall systems can provide higher energy efficiency and the reduction of greenhouse gas emission for major locations in Australia.

Fayez Aldawi; Firoz Alam; Iftekhar Khan; Mohamed Alghamdi

2013-01-01T23:59:59.000Z

279

Thermal and sanitary performance of domestic hot water cylinders: Conflicting requirements  

Science Journals Connector (OSTI)

Abstract In order to understand the sanitary implications around the demand side management of domestic hot water cylinders, microbial samples were taken from the bottom of 10 UK domestic electric hot water tanks whose heating elements are connected to a controlled off-peak supply. The results indicated high concentrations of bacteria in the water and biofilm. Microbial concentrations remained high in spite of the application of seven hours of heating during off-peak hours. Further numerical and experimental work shows that this problem arises due to the differing modes of heat transfer that prevail above and below the immersion element. The results from thermal and bacterial growth models suggest that it is impossible to achieve sanitary conditions throughout standard domestic hot water tanks without significantly increasing the heating element temperature or lowering the heating element from its current position. Raising the immersion thermostat temperature results in additional heat losses whilst lowering the immersion position compromises thermal stratification leading to uneconomical operation. Guidelines around storing hot water at temperatures that are sufficient for the purposes of sterilizing human pathogens such as Legionella, fail to take account of the conflict between thermal and sanitary performance. By better understanding the distribution of temperatures and bacteria within hot water tanks along with the associated risks, improved design and control strategies may be adopted to facilitate effective demand side management of hot water systems whilst meeting sanitary requirements.

Peter M. Armstrong; Meg Uapipatanakul; Ian Thompson; Duane Ager; Malcolm McCulloch

2014-01-01T23:59:59.000Z

280

Operational Performance Results of an Innovative Solar Thermal Cooling and Heating Plant  

Science Journals Connector (OSTI)

Solar thermal cooling and heating plants with single-effect sorption chillers/heat pumps promise primary energy savings compared to electric vapor compression chiller systems. Yet, the need of auxiliary electric a nd fossil energy for the operation and backup of the thermal cooling system possibly worsen the primary energy balance. An auspicious approach to overcome this problem is the application of a more efficient multi -stage sorption chiller with flexible operational modes. A pilot installation of that innovative solar thermal heating and cooling plant comprising a two stage absorption chiller/heat pump is presented. Beginning with the motivation and the system concept, a detailed analysis of the 2011/2012 cooling and heating periods is shown. The influence of the different system components – especially the absorption chiller – on the overall system performance is analyzed and a comparison to data from a detailed dynamic model is carried out. Recommendations for the improvement with respect to efficiency and economic aspects are given based on the installation process and the operational experience gained in the last 1 ½ years.

Manuel Riepl; Felix Loistl; Richard Gurtner; Martin Helm; Christian Schweigler

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Electrochemical performance and thermal property of electrospun PPESK/PVDF/PPESK composite separator for lithium-ion battery  

Science Journals Connector (OSTI)

In this study, PPESK/PVDF/PPESK tri-layer composite separators for lithium-ion batteries were prepared by electrospinning technique. The physical properties, electrochemical performances and thermal properties of...

Chun Lu; Wen Qi; Li Li; Jialong Xu; Ping Chen…

2013-07-01T23:59:59.000Z

282

Advancement of Electrochromic Windows  

E-Print Network (OSTI)

heat gain coefficient (SHGC) range of 0.42–0.09. Findingslow-e windows (Tv=0.42, SHGC=0.22) to serve as a referencewall for glare (Tv =0.05, SHGC=0.09) reduced average daily

2006-01-01T23:59:59.000Z

283

Thermal Performance of Deep-Burn Fusion-Fission Hybrid Waste in a Repository  

SciTech Connect

The Laser Inertial Confinement Fusion Fission Energy (LIFE) Engine [1] combines a neutron-rich but energy-poor inertial fusion system with an energy-rich but neutron-poor subcritical fission blanket. Because approximately 80% of the LIFE Engine energy is produced from fission, the requirements for laser efficiency and fusion target performance are relaxed, compared to a pure-fusion system, and hence a LIFE Engine prototype can be based on target performance in the first few years of operation of the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL). Similarly, because of the copious fusion neutrons, the fission blanket can be run in a subcritical, driven, mode, without the need for control rods or other sophisticated reactivity control systems. Further, because the fission blanket is inherently subcritical, fission fuels that can be used in LIFE Engine designs include thorium, depleted uranium, natural uranium, spent light water reactor fuel, highly enriched uranium, and plutonium. Neither enrichment nor reprocessing is required for the LIFE Engine fuel cycle, and burnups to 99% fraction of initial metal atoms (FIMA) being fissioned are envisioned. This paper discusses initial calculations of the thermal behavior of spent LIFE fuel following completion of operation in the LIFE Engine [2]. The three time periods of interest for thermal calculations are during interim storage (probably at the LIFE Engine site), during the preclosure operational period of a geologic repository, and after closure of the repository.

Blink, J A; Chipman, V; Farmer, J; Shaw, H; Zhao, P

2008-11-25T23:59:59.000Z

284

Thermal performance analysis of a direct-expansion solar-assisted heat pump water heater  

Science Journals Connector (OSTI)

A direct-expansion solar-assisted heat pump water heater (DX-SAHPWH) is described, which can supply hot water for domestic use during the whole year. The system mainly employs a bare flat-plate collector/evaporator with a surface area of 4.2 m2, an electrical rotary-type hermetic compressor, a hot water tank with the volume of 150 L and a thermostatic expansion valve. R-22 is used as working fluid in the system. A simulation model based on lumped and distributed parameter approach is developed to predict the thermal performance of the system. Given the structure parameters, meteorological parameters, time step and final water temperature, the numerical model can output operational parameters, such as heat capacity, system COP and collector efficiency. Comparisons between the simulation results and the experimental measurements show that the model is able to give satisfactory predictions. The effect of various parameters, including solar radiation, ambient temperature, wind speed and compressor speed, has been analyzed on the thermal performance of the system.

X.Q. Kong; D. Zhang; Y. Li; Q.M. Yang

2011-01-01T23:59:59.000Z

285

Evaluation of the Transient Thermal Performance of a Graphite Foam/Phase Change Material Composite.  

E-Print Network (OSTI)

?? The thermal transient response of graphite foam infiltrated with paraffin wax as a thermal protection composite was investigated. Graphite foam is a rigid open-celled… (more)

Trammell, Michael Paul

2013-01-01T23:59:59.000Z

286

Buildings Energy Data Book: 5.2 Windows  

Buildings Energy Data Book (EERE)

8 8 Typical Thermal Performance of Residential Windows, by Type Single-Glazed Clear Single-Glazed with Bronze Tint Double-Glazed Clear Double-Glazed with grey/Bronze Tint Double-Glazed with High Performance Tint Double-Glazed with High-Solar Gain Low-e Glass, Argon/Krypton Gas Double-Glazed with Moderate-Solar Gain Low-e Glass, Argon/Krypton Gas Double-Glazed with Low-Solar Gain Low-e (1) Glass, Argon/Krypton Gas Triple-Glazed (2) with High-Solar Gain Low-e Glass, Argon/Krypton Gas (3) Triple-Glazed (2) with Low-Solar Gain Low-e (1) Glass, Argon/Krypton Gas (3) Note(s): Source(s): The Efficient Windows Collaborative (http://www.efficientwindows.org) 0.14 0.33 0.56 1) Spectrally selective. 2) Includes double glazing with suspended film. 3) Center of glass properties, does not include frame or installation

287

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

Release Notes Release Notes Updated: 11/07/11 History of COMFEN 3.1 Releases New Features Glazed Wall Assembly In addition to modeling individual windows, COMFEN now has the capability of modeling "Glazed Wall Assemblies" which allow you to specify the number of horizontal and vertical framing members, as well as their spacing, and the program automatically generates the facade. Click here for more details. Material Library COMFEN now has a Material Library, which can be used in the Wall Construction and Spandrel Libraries. See the User Manual for more details. Wall Library COMFEN now has a Wall Library which can be used to build up layers from the Material Library to define a wall. See the User Manual for more details. Spandrel Library COMFEN now has a Spandrel Library which can be used to build up layers from the Material Library to define a spandrel, including glass and glazing systems as the outer-most layers. See the User Manual for more details.

288

Energy Savings from Window Attachments  

Energy.gov (U.S. Department of Energy (DOE))

This study presents energy-modeling results for a large number of window combinations with window attachments in typical residential buildings and in varied climates throughout the United States.

289

The Window Strategy with Options  

E-Print Network (OSTI)

The window strategy is one of several marketing strategies using futures and options to establish a floor price and allow for upside price potential. It also reduces option premium costs. This publication discusses how the window strategy works...

McCorkle, Dean; Amosson, Stephen H.; Fausett, Marvin

1999-06-23T23:59:59.000Z

290

Building Technologies Office: Windows, Skylights, and Doors Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Windows, Skylights, and Doors Research Windows, Skylights, and Doors Research The Emerging Technology team conducts research into technologies related to windows, skylights, and doors. These technologies can decrease energy demands, save money, and improve occupant thermal comfort. By working with industry partners, researchers, and other stakeholders, the U.S. Department of Energy also seeks to improve the availability of these products in the market. Research in windows, skylights, and doors includes: Daylighting and Shading Photo of a wall of windows with shades built over them to block out the noon sun. Daylighting and shading technologies alter the way that natural light affects a building, either by allowing more of it in (to light a room) or by preventing it from coming in. These technologies are important in that they allow building operators and managers to lower a building's lighting energy needs, as well as reducing the energy used in heating, ventilation, and air conditioning (HVAC) systems.

291

Nanolens Window Coatings for Daylighting  

NLE Websites -- All DOE Office Websites (Extended Search)

Nanolens Window Coatings for Nanolens Window Coatings for Daylighting Kyle J. Alvine Pacific Northwest National Laboratory Kyle.alvine@pnnl.gov / (509) - 372 - 4475 April 4 th , 2013 Demonstration of the effect To develop a novel, low-cost window coating to double daylight penetration to offset lighting energy use 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: PNNL is developing a novel, low-cost window coating to redirect daylight deeper into buildings to significantly offset lighting energy.

292

Nanolens Window Coatings for Daylighting  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Nanolens Window Coatings for Nanolens Window Coatings for Daylighting Kyle J. Alvine Pacific Northwest National Laboratory Kyle.alvine@pnnl.gov / (509) - 372 - 4475 April 4 th , 2013 Demonstration of the effect To develop a novel, low-cost window coating to double daylight penetration to offset lighting energy use 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: PNNL is developing a novel, low-cost window coating to redirect daylight deeper into buildings to significantly offset lighting energy.

293

Windows Bitmap .bmp or .dib  

E-Print Network (OSTI)

platforms' GDI subsystem, where the specific format used is the Windows and OS/2 bitmap file format, usually

Gribaudo, Marco

294

Thermal and Electrical Analysis of MARS Rover RTG, and Performance Comparison of Alternative Design Options.  

SciTech Connect

The paper describes the thermal, thermoelectric and electrical analysis of Radioisotope Thermoelectric Generators (RTGs) for powering the MARS Rover vehicle, which is a critical element of the unmanned Mars Rover and Sample Return mission (MRSR). The work described was part of an RTG design study conducted by Fairchild Space Company for the U.S. Department of Energy, in support of the Jet Propulsion Laboratory's MRSR Project.; A companion paper presented at this conference described a reference mission scenario, al illustrative Rover design and activity pattern on Mars, its power system requirements and environmental constraints, a design approach enabling RTG operation in the Martian atmosphere, and the design and the structural and mass analysis of a conservative baseline RTG employing safety-qualified heat source modules and reliability-proven thermoelectric converter elements.; The present paper presents a detailed description of the baseline RTG's thermal, thermoelectric, and electrical analysis. It examines the effect of different operating conditions (beginning versus end of mission, water-cooled versus radiation-cooled, summer day versus winter night) on the RTG's performance. Finally, the paper describes and analyzes a number of alternative RTG designs, to determine the effect of different power levels (250W versus 125W), different thermoelectric element designs (standard versus short unicouples versus multicouples) and different thermoelectric figures of merit (0.00058K(superscript -1) to 0.000140K (superscript -1) on the RTG's specific power.; The results presented show the RTG performance achievable with current technology, and the performance improvements that would be achievable with various technology developments. It provides a basis for selecting the optimum strategy for meeting the Mars Rover design goals with minimal programmatic risk and cost.; There is a duplicate copy and also a duplicate copy in the ESD files.

Schock, Alfred; Or, Chuen T; Skrabek, Emanuel A

1989-09-29T23:59:59.000Z

295

AN ENERGY EFFICIENT WINDOW SYSTEM FINAL REPORT.  

E-Print Network (OSTI)

for a variety of glass window films and so provides thetesting metallized mylar window films. They involve exposingconsumers to install window film products. The rigid sheet

Authors, Various

2011-01-01T23:59:59.000Z

296

Windows Forensic Analysis DVD Toolkit  

Science Journals Connector (OSTI)

The only book available on the market that addresses and discusses in-depth forensic analysis of Windows systems. Windows Forensic Analysis DVD Toolkit takes the reader to a whole new, undiscovered level of forensic analysis for Windows systems, providing ... Keywords: Computer Science, Security

Harlan Carvey

2007-04-01T23:59:59.000Z

297

Performance analysis of an integrated CHP system with thermal and Electric Energy Storage for residential application  

Science Journals Connector (OSTI)

The aim of this paper is the evaluation of the profitability of micro-CHP systems for residential application. An integrated CHP system composed of a prime mover, an Electric Energy Storage system, a thermal storage system and an auxiliary boiler has been considered. The study has been carried out taking into account a particular electrochemical storage system which requires also thermal energy, during its operation, for a better exploitation of the residual heat discharged by the prime mover. The prime mover could be a conventional Internal Combustion Engine or also an innovative system, such as fuel cell or organic Rankine cycle. An investigation of this integrated CHP system has been carried out, by means of an in-house developed calculation code, performing a thermo-economic analysis. This paper provides useful results, in order to define the optimum sizing of components of the integrated CHP system under investigation; the developed code allows also to evaluate the profitability and the primary energy saving with respect to the separate production of electricity and heat.

M. Bianchi; A. De Pascale; F. Melino

2013-01-01T23:59:59.000Z

298

Thermal Performance of the Supporting System for the Large Hadron Collider (LHC) Superconducting Magnets  

E-Print Network (OSTI)

The LHC collider will be composed of approximately 1700 main ring superconducting magnets cooled to 1.9 K in pressurised superfluid helium and supported within their cryostats on low heat in-leak column-type supports. The precise positioning of the heavy magnets and the stringent thermal budgets imposed by the machine cryogenic system, require a sound thermo-mechanical design of the support system. Each support is composed of a main tubular thin-walled structure in glass-fibre reinforced epoxy resin, with its top part interfaced to the magnet at 1.9 K and its bottom part mounted onto the cryostat vacuum vessel at 293 K. In order to reduce the conduction heat in-leak at 1.9 K, each support mounts two heat intercepts at intermediate locations on the column, both actively cooled by cryogenic lines carrying helium gas at 4.5-10 K and 50-65 K. The need to assess the thermal performance of the supports has lead to setting up a dedicated test set-up for precision heat load measurements on prototype supports. This pa...

Castoldi, M; Parma, Vittorio; Vandoni, Giovanna

1999-01-01T23:59:59.000Z

299

Future Advanced Windows for Zero-Energy Homes  

NLE Websites -- All DOE Office Websites (Extended Search)

Future Advanced Windows for Zero-Energy Homes Future Advanced Windows for Zero-Energy Homes Title Future Advanced Windows for Zero-Energy Homes Publication Type Conference Paper LBNL Report Number LBNL-51913 Year of Publication 2002 Authors Apte, Joshua S., Dariush K. Arasteh, and Yu Joe Huang Conference Name ASHRAE Transactions Volume 109, pt 2 Date Published 06/2003 Conference Location Kansas City, MO Call Number LBNL-51913 Abstract Over the past 15 years, low-emissivity and other technological improvements have significantly improved the energy efficiency of windows sold in the United States. However, as interest increases in the concept of zero-energy homes-buildings that do not consume any nonrenewable or net energy from the utility grid-even today's highest-performance window products will not be sufficient. This simulation study compares today's typical residential windows, today's most efficient residential windows, and several options for advanced window technologies, including products with improved fixed or static properties and products with dynamic solar heat gain properties. Nine representative window products are examined in eight representative U.S. climates. Annual energy and peak demand impacts are investigated. We conclude that a new generation of window products is necessary for zero-energy homes if windows are not to be an energy drain on these homes. Windows with dynamic solar heat gain properties are found to offer significant potential in reducing energy use and peak demands in northern and central climates, while windows with very low (static) solar heat gain properties offer the most potential in southern climates.

300

Performance prediction of a solar thermal energy system using artificial neural networks  

Science Journals Connector (OSTI)

Abstract This paper describes in details an application of artificial neural networks (ANNs) to predict the performance of a solar thermal energy system (STES) used for domestic hot water and space heating application. Experiments were conducted on the STES under a broad range of operating conditions during different seasons and Canadian weather conditions in Ottawa, over the period of March 2011 through December 2012 to assess the system performance. These experimental data were utilised for training, validating and testing the proposed ANN model. The model was applied to predict various performance parameters of the system, namely the preheat tank stratification temperatures, the heat input from the solar collectors to the heat exchanger, the heat input to the auxiliary propane-fired tank, and the derived solar fractions. The back-propagation learning algorithm with two different variants, the Levenberg–Marguardt (LM) and scaled conjugate gradient (SCG) algorithms were used in the network. It was found that the optimal algorithm and topology were the LM and the configuration with 10 inputs, 20 hidden and 8 output neurons/outputs, respectively. The preheat tank temperature and solar fraction predictions agreed very well with the experimental values using the testing data sets. The \\{ANNs\\} predicted the preheat water tank stratification temperatures and the solar fractions of the STES within less that ±3% and ±10% errors, respectively. The results confirmed the effectiveness of this method and provided very good accuracy even when the input data are distorted with different levels of noise. Moreover, the results of this study demonstrate that the ANN approach can provide high accuracy and reliability for predicting the performance of complex energy systems such as the one under investigation. Finally, this method can also be exploited as an effective tool to develop applications for predictive performance monitoring system, condition monitoring, fault detection and diagnosis of STES.

Wahiba Yaïci; Evgueniy Entchev

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Effect of simultaneous electrical and thermal treatment on the performance of bulk heterojunction organic solar cell blended with organic salt  

SciTech Connect

This work presents the influence of simultaneous electrical and thermal treatment on the performance of organic solar cell blended with organic salt. The organic solar cells were composed of indium tin oxide as anode, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene]: (6,6)-phenyl-C61 butyric acid methyl ester: tetrabutylammonium hexafluorophosphate blend as organic active layer and aluminium as cathode. The devices underwent a simultaneous fixed-voltage electrical and thermal treatment at different temperatures of 25, 50 and 75 °C. It was found that photovoltaic performance improved with the thermal treatment temperature. Accumulation of more organic salt ions in the active layer leads to broadening of p-n doped regions and hence higher built-in electric field across thin intrinsic layer. The simultaneous electrical and thermal treatment has been shown to be able to reduce the electrical treatment voltage.

Sabri, Nasehah Syamin; Yap, Chi Chin; Yahaya, Muhammad [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia); Salleh, Muhamad Mat [Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia)

2013-11-27T23:59:59.000Z

302

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Improved Comfort Improved Comfort Comfort High performance windows with new glazing technologies not only reduce energy costs but make homes more comfortable as well. During cold weather, exterior temperatures drive interior glass surface temperatures down below the room air temperature; how low the glass temperature drops depends on the window's insulating quality. If people are exposed to the effects of a cold surface, they can experience significant radiant heat loss to that cold surface and they feel uncomfortable, even if the room air temperature is comfortable. When the interior glass surface temperature is 52ËšF or less, it is most likely that there will be discomfort. During warm weather, solar radiation can cause discomfort. Just as people turn up the heat to compensate for cold windows in cold weather, they may use

303

Atmospheric Pressure Deposition for Electrochromic Windows |...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Atmospheric Pressure Deposition for Electrochromic Windows Atmospheric Pressure Deposition for Electrochromic Windows Emerging Technologies Project for the 2013 Building...

304

Experimental Research on Thermal Performance of Lightweight Envelope Integrated with Phase Change Material  

Science Journals Connector (OSTI)

Present relief camp built with lightweight envelope has obvious cold-house effect and poor indoor thermal environment. Advantage of phase change material provides one possible way to improve thermal...

Jun Wang; Long Xu; Enshen Long

2014-01-01T23:59:59.000Z

305

Off-design performance analysis of a closed-cycle ocean thermal energy conversion system with solar thermal preheating and superheating  

Science Journals Connector (OSTI)

Abstract This article reports the off-design performance analysis of a closed-cycle ocean thermal energy conversion (OTEC) system when a solar thermal collector is integrated as an add-on preheater or superheater. Design-point analysis of a simple OTEC system was numerically conducted to generate a gross power of 100 kW, representing a base OTEC system. In order to improve the power output of the OTEC system, two ways of utilizing solar energy are considered in this study: (1) preheating of surface seawater to increase its input temperature to the cycle and (2) direct superheating of the working fluid before it enters a turbine. Obtained results reveal that both preheating and superheating cases increase the net power generation by 20–25% from the design-point. However, the preheating case demands immense heat load on the solar collector due to the huge thermal mass of the seawater, being less efficient thermodynamically. The superheating case increases the thermal efficiency of the system from 1.9% to around 3%, about a 60% improvement, suggesting that this should be a better approach in improving the OTEC system. This research provides thermodynamic insight on the potential advantages and challenges of adding a solar thermal collection component to OTEC power plants.

Hakan Aydin; Ho-Saeng Lee; Hyeon-Ju Kim; Seung Kyoon Shin; Keunhan Park

2014-01-01T23:59:59.000Z

306

The Envelope Thermal Test Unit (ETTU): Full Measurement of Wall Perform ance  

E-Print Network (OSTI)

Energy Conservation in the Built Environment, Dublin, Ireland, March 30-April THE ENVELOPE THERMAL TEST UNIT (ETTU): FIELD MEASUREMENT

Sonderegger, R.C.; Sherman, M.H.; Adams, J.W.

2008-01-01T23:59:59.000Z

307

The Envelope Thermal Test Unit (ETTU): Full Measurement of Wall Perform ance  

E-Print Network (OSTI)

Energy Conservation in the Built Environment, Dublin, Ireland, March 30-April THE ENVELOPE THERMAL TEST UNIT (ETTU): FIELD MEASUREMENT

Adams, J.W.

2010-01-01T23:59:59.000Z

308

EXPERIMENTAL EVALUATION OF THE THERMAL PERFORMANCE OF A WATER SHIELD FOR A SURFACE POWER REACTOR  

SciTech Connect

Water based reactor shielding is being investigated for use on initial lunar surface power systems. A water shield may lower overall cost (as compared to development cost for other materials) and simplify operations in the setup and handling. The thermal hydraulic performance of the shield is of significant interest. The mechanism for transferring heat through the shield is natural convection. Natural convection in a 100 kWt lunar surface reactor shield design is evaluated with 2 kW power input to the water in the Water Shield Testbed (WST) at the NASA Marshall Space Flight Center. The experimental data from the WST is used to validate a CFD model. Performance of the water shield on the lunar surface is then predicted with a CFD model anchored to test data. The experiment had a maximum water temperature of 75 C. The CFD model with 1/6-g predicts a maximum water temperature of 88 C with the same heat load and external boundary conditions. This difference in maximum temperature does not greatly affect the structural design of the shield, and demonstrates that it may be possible to use water for a lunar reactor shield.

REID, ROBERT S. [Los Alamos National Laboratory; PEARSON, J. BOSIE [Los Alamos National Laboratory; STEWART, ERIC T. [Los Alamos National Laboratory

2007-01-16T23:59:59.000Z

309

Steady-State Thermal Performance Evaluation of Steel-Framed Wall Assembly with Local Foam Insulation  

SciTech Connect

During January and May, 2009, two configurations of steel-framed walls constructed with conventional 2 4 steel studs insulated with R-19 ~14cm. (5.5-in. thick) and R-13 ~9cm. (3.5-in. thick) fiberglass insulation batts were tested in the Oak Ridge National Laboratory (ORNL) guarded hot-box using ASTM C1363 test procedure. The first test wall used conventional 2 4 steel studs insulated with 2.5-cm. (1-in.) thick foam profiles, called stud snugglers. These stud snugglers converted the 2 4 wall assembly into a 2 6 assembly allowing application of R-19 fiberglass insulation. The second wall tested for comparison was a conventional 2 4 steel stud wall using R-13 insulation batts. Further, numerical simulations were performed in order to evaluate the steady-state thermal performance of various wood- and steel-framed wall assemblies. The effects of adding the stud-snugglers to the wood and steel studs were also investigated numerically. Different combinations of insulation and framing factor were used in the simulations.

Kosny, Jan [ORNL] [ORNL; Biswas, Kaushik [ORNL] [ORNL; Childs, Phillip W [ORNL] [ORNL

2010-01-01T23:59:59.000Z

310

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Links Links Government, Research, and Educational Organizations Alliance to Save Energy ewc@ase.org www.ase.org exit disclaimer Building Codes Assistance Project (BCAP) www.bcap-energy.org exit disclaimer BCAP's Online Code Environment & Advocacy Network (OCEAN) energycodesocean.org exit disclaimer Center for Sustainable Building Research csbr@umn.edu www.csbr.umn.edu exit disclaimer ENERGY STAR Windows Program www.energystar.gov exit disclaimer Florida Solar Energy Center (FSEC) www.fsec.ucf.edu exit disclaimer Lawrence Berkeley National Laboratory (LBNL) windows.lbl.gov exit disclaimer National Fenestration Rating Council (NFRC) info@nfrc.org www.nfrc.org exit disclaimer National Renewable Energy Laboratory Center for Buildings and Thermal Energy Systems (NREL) www.nrel.gov exit disclaimer

311

LBNL Windows & Daylighting Software -- THERM  

NLE Websites -- All DOE Office Websites (Extended Search)

THERM 5.2 (older version) THERM 5.2 (older version) Download New Features Knowledge Base (Check here first if you are experiencing a problem with the software) Documentation Two-Dimensional Building Heat-Transfer Modeling THERM is a state-of-the-art, Microsoft Windows™-based computer program developed at Lawrence Berkeley National Laboratory (LBNL) for use by building component manufacturers, engineers, educators, students, architects, and others interested in heat transfer. Using THERM, you can model two-dimensional heat-transfer effects in building components such as windows, walls, foundations, roofs, and doors; appliances; and other products where thermal bridges are of concern. THERM's heat-transfer analysis allows you to evaluate a product’s energy efficiency and local temperature patterns, which may relate directly to problems with

312

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Window Technologies: Low Conductance Spacers Window Technologies: Low Conductance Spacers Spacers The lites of glass in an insulating unit must be held apart at the appropriate distance by spacers. In addition to keeping the glass lites separated, the spacer system must serve a number of functions: accommodate stress induced by thermal expansion and pressure differences; provide a moisture barrier that prevents passage of water or water vapor that would fog the unit; provide a gas-tight seal that prevents the loss of any special low-conductance gas in the air space; create an insulating barrier that reduces the formation of interior condensation at the edge. Spacers The standard solution for insulating glass units (IGUs) is the use of metal spacers and sealants. These spacers, typically aluminum, also

313

Optical distortions and birefringence in high power laser windows: model and computer code  

SciTech Connect

A general optical model is given which predicts optical wave front distortions and birefringence due to stress and temperature variations in laser heated and pressure loaded windows for cubic lattice window materials. A computer code is described that integrates stress and thermal computations with an optical model to predict the wave front distortions. Restrictive approximations, which have been used previously to predict window temperatures and stress distributions, are avoided by using stress and thermal codes to predict these distributions within the windows. Comparisons between code predictions and experimental results are given.

Greninger, C.E.; Needham, G.A.; Rebar J. Jr.

1985-09-01T23:59:59.000Z

314

The effect of simplifying the building description on the numerical modeling of its thermal performance  

SciTech Connect

A thermal building simulation program is a numerical model that calculates the response of the building envelopes to weather and human activity, simulates dynamic heating and cooling loads, and heating and cooling distribution systems, and models building equipment operation. The scope of the research is to supply the users of such programs with information about the dangers and benefits of simplifying the input to their models. The Introduction describes the advantages of modeling the heat transfer mechanisms in a building. The programs that perform this type of modeling have, however, limitations. The user is therefore often put in the situation of simplifying the floor plans of the building under study, but not being able to check the effects that this approximation introduces in the results of the simulation. Chapter 1 is a description of methods. It also introduces the floor plans for the office building under study and the ``reasonable`` floor plans simplifications. Chapter 2 presents DOE-2, the thermal building simulation program used in the sensitivity study. The evaluation of the accuracy of the DOE-2 program itself is also presented. Chapter 3 contains the sensitivity study. The complicated nature of the process of interpreting the temperature profile inside a space leads to the necessity of defining different building modes. The study compares the results from the model of the detailed building description with the results from the models of the same building having simplified floor plans. The conclusion is reached that a study of the effects of simplifying the floor plans of a building is important mainly for defining the cases in which this approximation is acceptable. Different results are obtained for different air conditioning/load regimes of the building. 9 refs., 24 figs.

Stetiu, C.

1993-07-01T23:59:59.000Z

315

A Design Guide for Early-Market Electrochromic Windows  

NLE Websites -- All DOE Office Websites (Extended Search)

Early-Market Electrochromic Windows Early-Market Electrochromic Windows Title A Design Guide for Early-Market Electrochromic Windows Publication Type Report LBNL Report Number LBNL-59950 Year of Publication 2006 Authors Lee, Eleanor S., Stephen E. Selkowitz, Robert D. Clear, Dennis L. DiBartolomeo, Joseph H. Klems, Luis L. Fernandes, Gregory J. Ward, Vorapat Inkarojrit, and Mehry Yazdanian Call Number LBNL-59950 Abstract Switchable variable-tint electrochromic windows preserve the view out while modulating transmitted light, glare, and solar heat gains and can reduce energy use and peak demand. To provide designers objective information on the risks and benefits of this technology, this study offers data from simulations, laboratory tests, and a 2.5-year field test of prototype large-area electrochromic windows evaluated under outdoor sun and sky conditions. The study characterized the prototypes in terms of transmittance range, coloring uniformity, switching speed, and control accuracy. It also integrated the windows with a daylighting control system and then used sensors and algorithms to balance energy efficiency and visual comfort, demonstrating the importance of intelligent design and control strategies to provide the best performance. Compared to an efficient low-e window with the same daylighting control system, the electrochromic window showed annual peak cooling load reductions from control of solar heat gains of 19-26% and lighting energy use savings of 48-67% when controlled for visual comfort. Subjects strongly preferred the electrochromic window over the reference window, with preferences related to perceived reductions in glare, reflections on the computer monitor, and window luminance. The EC windows provide provided the benefit of greater access to view year-round. Though not definitive, findings can be of great value to building professionals.

316

Energy modeling of photovoltaic thermal systems with corrugated unglazed transpired solar collectors – Part 2: Performance analysis  

Science Journals Connector (OSTI)

Abstract This paper is the second of two companion papers focused on energy modeling and performance analysis of building-integrated photovoltaic thermal (PV/T) systems with corrugated unglazed transpired solar collectors (UTCs). In Part 1, energy models are presented for two configurations: UTC only and UTC with PV panels. The models predict the energy output of the system for different weather and system design conditions and are validated using measured data from an outdoor test facility. In this paper (Part 2), the system performance is evaluated based on data drawn from the literature and simulations with Computational Fluid Dynamics (CFD) and energy models. The analysis includes parameters that are unique for this system, such as the corrugation geometry and the collector orientation. Validated, high resolution CFD simulations are used to study the impact of plate orientation and incident turbulence intensity, based on the comparison of exterior and interior Nusselt (Nu) number and the cavity exit air temperature, as well as the PV surface temperature when \\{UTCs\\} are integrated with PV panels. It is found that for configurations with UTC only, both exterior and interior convective heat transfer is enhanced in the ‘vertical’ installation, while similar results were obtained for increased incident turbulence intensity levels. However, only minor influences from these two parameters are observed for \\{UTCs\\} with PV panels. The energy model is used to investigate the optimal geometry for both configurations. It is found that parameters such as slope length and corrugation wavelength have the most significant impact on UTC performance while the wavelength and PV panel height have the largest effect for \\{UTCs\\} with PV panels.

Siwei Li; Panagiota Karava

2014-01-01T23:59:59.000Z

317

WINDOW 5 Glass Library Update  

NLE Websites -- All DOE Office Websites (Extended Search)

WINDOW 6 or 7 Glass Library Update WINDOW 6 or 7 Glass Library Update Last update:12/09/13 07:26 PM Automatic IGDB Update Feature in WINDOW 6 and 7 The latest versions of WINDOW 6 and 7 have an automatic IGDB database update function in the Glass Library. When you first open the program, it checks to see if there is an IGDB version later than what you already have installed, and will notify you if there is an update. Then you can download and install the IGDB database, and click on the Update IGDB button in the Glass Library in order to start the automatic update. For older versions of WINDOW 6 and 7 without the automatic IGDB update function bullet How to Check the Current WINDOW5 IGDB Version bullet Updating the Glass Library bullet Problem Updating the Glass Library bullet Discontinued Records or Reused NFRC IDs

318

Market Transformation Efforts for Residential Energy Efficient Windows: An  

NLE Websites -- All DOE Office Websites (Extended Search)

Market Transformation Efforts for Residential Energy Efficient Windows: An Market Transformation Efforts for Residential Energy Efficient Windows: An Update of National Activities Title Market Transformation Efforts for Residential Energy Efficient Windows: An Update of National Activities Publication Type Report LBNL Report Number LBNL-46620 Year of Publication 2000 Authors Ward, Alecia, Margaret Suozzo, and Joseph H. Eto Date Published 01/2000 Publisher LBNL Abstract With the burst of recent initiatives to accelerate adoption of energy-efficient fenestration technologies in the marketplace, an update on window market transformation efforts is needed. Because of the impact of glazing on total home energy performance, the residential window market has received increasing attention over the past two years. National programs such as the ENERGY STAR Windows program, the Efficient Windows Collaborative, and regional initiatives such as the California Windows Initiative and the Northwest Collaborative have begun to move markets toward higher-efficiency windows. The results have included increasing sales of efficient products, stocking of more efficient/ENERGY STAR qualifying products, and price reductions of high-efficiency product, all of which secure dramatic energy savings at a national level. This paper takes stock of publicly supported national and regional transformation efforts for residential windows underway in the U.S. In particular, it documents ways in which National Fenestration Rating Council certification, Efficient Windows Collaborative education, and ENERGY STAR marketing, are working together to change window markets across the United States. Although it is too early to quantify the national-level impacts changes of these efforts, the authors offer a preliminary qualitative evaluation of efficient window promotion efforts to gain insight into the broader impacts that these and other future activities will achieve. Finally, the paper summarizes how other federally-funded building industry initiatives that emphasize "whole house" performance can complement these window technology-specific and component-specific initiatives. Demonstration houses from the Building America, ENERGY STAR Homes, and PATH projects all contribute to the success of windows-specific initiatives.

319

Investigation of new heat exchanger design performance for solar thermal chemical heat pump.  

E-Print Network (OSTI)

?? The emergence of Thermally Driven Cooling system has received more attention recently due to its ability to utilize low grade heat from engine, incinerator… (more)

Cordova, Cordova

2013-01-01T23:59:59.000Z

320

Off-peak summer performance enhancement for rows of fixed solar thermal collectors using reflective surfaces.  

E-Print Network (OSTI)

??The possibility of increasing the efficiency of fixed solar thermal collectors without greatly adding to the cost or complexity of the overall solar collection system… (more)

Armenta, Casiano

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Thermophilic anaerobic digestion of thermal pretreated sludge: Role of microbial community structure and correlation with process performances  

Science Journals Connector (OSTI)

Abstract Thermal hydrolysis pretreatment coupled with Thermophilic Anaerobic Digestion (TAD) for Waste Activated Sludge (WAS) treatment is a promising combination to improve biodegradation kinetics during stabilization. However, to date there is a limited knowledge of the anaerobic biomass composition and its impact on TAD process performances. In this study, the structure and dynamics of the microbial communities selected in two semi-continuous anaerobic digesters, fed with untreated and thermal pretreated sludge, were investigated. The systems were operated for 250 days at different organic loading rate. 16S rRNA gene clonal analysis and Fluorescence In Situ Hybridization (FISH) analyses allowed us to identify the majority of bacterial and archaeal populations. Proteolytic Coprothermobacter spp. and hydrogenotrophic Methanothermobacter spp. living in strict syntrophic association were found to dominate in TAD process. The establishment of a syntrophic proteolytic pathway was favoured by the high temperature of the process and enhanced by the thermal pretreatment of the feeding sludge. Proteolytic activity, alone or with thermal pretreatment, occurred during TAD as proven by increasing concentration of soluble ammonia and soluble COD (sCOD) during the process. However, the availability of a readily biodegradable substrate due to pretreatment allowed to significant sCOD removals (more than 55%) corresponding to higher biogas production in the reactor fed with thermal pretreated sludge. Microbial population dynamics analysed by FISH showed that Coprothermobacter and Methanothermobacter immediately established a stable syntrophic association in the reactor fed with pretreated sludge in line with the overall improved TAD performances observed under these conditions.

M.C. Gagliano; C.M. Braguglia; A. Gianico; G. Mininni; K. Nakamura; S. Rossetti

2015-01-01T23:59:59.000Z

322

Thermal Performance of Exposed Composed Roofs in Very Hot Dry Desert Region in Egypt (Toshky)  

E-Print Network (OSTI)

is considered the major part of the building envelop which exposed to high thermal load due to the high solar intensity and high outdoor air temperature through summer season which reach to 6 months. In Egypt the thermal effect of roof is increased as one go...

Khalil, M. H.; Sheble, S.; Morsey, M. S.; Fakhry, S.

2010-01-01T23:59:59.000Z

323

Simulating Complex Window Systems using BSDF Data  

NLE Websites -- All DOE Office Websites (Extended Search)

Complex Window Systems using BSDF Data Complex Window Systems using BSDF Data Title Simulating Complex Window Systems using BSDF Data Publication Type Conference Paper LBNL Report Number LBNL-4416E Year of Publication 2009 Authors Lee, Eleanor S., Jacob C. Jonsson, and Maria Konstantoglou Call Number LBNL-4416E Abstract Nowadays, virtual models are commonly used to evaluate the performance of conventional window systems. Complex fenestration systems can be difficult to simulate accurately not only because of their geometry but also because of their optical properties that scatter light in an unpredictable manner. Bi-directional Scattering Distribution Functions (BSDF) have recently been developed based on a mixture of measurements and modelling to characterize the optics of such systems. This paper describes the workflow needed to create then use these BSDF datasets in the Radiance lighting simulation software. Limited comparisons are made between visualizations produced using the standard ray-tracing method, the BSDF method, and that taken in a full-scale outdoor mockup.

324

A window on urban sustainability  

SciTech Connect

Sustainable urban development requires the integration of environmental interests in urban planning. Although various methods of environmental assessment have been developed, plan outcomes are often disappointing due to the complex nature of decision-making in urban planning, which takes place in multiple arenas within multiple policy networks involving diverse stakeholders. We argue that the concept of ‘decision windows’ can structure this seemingly chaotic chain of interrelated decisions. First, explicitly considering the dynamics of the decision-making process, we further conceptualized decision windows as moments in an intricate web of substantively connected deliberative processes where issues are reframed within a decision-making arena, and interests may be linked within and across arenas. Adopting this perspective in two case studies, we then explored how decision windows arise, which factors determine their effectiveness and how their occurrence can be influenced so as to arrive at more sustainable solutions. We conclude that the integration of environmental interests in urban planning is highly dependent on the ability of the professionals involved to recognize and manipulate decision windows. Finally, we explore how decision windows may be opened. -- Highlights: • Decision-making about sustainable urban development occurs in networks. • The concept of ‘decision windows’ was further elaborated. • Decision windows help understand how environmental interests enter decision-making. • Decision windows can, to some extent, be influenced.

Stigt, Rien van, E-mail: rien.vanstigt@hu.nl [Research Center for Technology and Innovation, Utrecht University of Applied Sciences, P.O. Box 182, 3500 AD Utrecht (Netherlands); Driessen, Peter P.J., E-mail: p.driessen@uu.nl [Copernicus Institute of Sustainable Development, Faculty of Geosciences, Utrecht University, P.O. Box 80.115, 3508 TC Utrecht (Netherlands); Spit, Tejo J.M., E-mail: T.J.M.Spit@uu.nl [Department of Human Geography and Spatial Planning, Faculty of Geosciences, Utrecht University, P.O. Box 80.115, 3508 TC Utrecht (Netherlands)

2013-09-15T23:59:59.000Z

325

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Window Technologies: Glazing Types Window Technologies: Glazing Types Glazing Improvements There are three fundamental approaches to improving the energy performance of glazing products (two or more of these approaches may be combined). The first approach is to alter the glazing material itself by changing its chemical composition or physical characteristics. An example of this is tinted glazing. The second approach is to apply a coating to the glazing material surface. Reflective coatings and films were developed to reduce heat gain and glare, and more recently, low-emittance coatings have been developed to improve both heating and cooling season performance. The third approach is to assemble various layers of glazing and control the properties of the spaces between the layers. These strategies include the use of two or more panes or films,

326

Laboratory Performance Testing of Residential Window Mounted...  

Energy Savers (EERE)

of Energy Building America Technical Update meeting on April 29-30, 2013, in Denver, Colorado. testingresidentialariconditionersbootenwinkler.pdf More Documents & Publications...

327

A Review of Electrochromic Window Performance Factors  

E-Print Network (OSTI)

Energy Efficiency and Renewable Energy, Office of BuildingEnergy Efficiency and Renewable Energy, Office of Building

Selkowitz Ed, S.E.

2010-01-01T23:59:59.000Z

328

A Review of Electrochromic Window Performance Factors  

E-Print Network (OSTI)

approaches, utility demand side management programs, and7. Utilities with demand-side management programs to reduce

Selkowitz Ed, S.E.

2010-01-01T23:59:59.000Z

329

A Review of Electrochromic Window Performance Factors  

E-Print Network (OSTI)

reduced annual electricity consumption by 23-30% and peakelectrochromic reduced electricity consumption by 39-41 %venetian blind reduced electricity consumption by 16-18% and

Selkowitz Ed, S.E.

2010-01-01T23:59:59.000Z

330

A Review of Electrochromic Window Performance Factors  

E-Print Network (OSTI)

heat gain coefficient (SHGC). Even if a practical devicenot have a significantly lower SHGC. On the other hand, forneeded to determine the SHGC, but usually reflectance does

Selkowitz Ed, S.E.

2010-01-01T23:59:59.000Z

331

SUITABILITY OF MAGNESIUM OXIDE AS A VISAR WINDOW  

SciTech Connect

Impedance matching of a velocity interferometer for any reflector (VISAR) window to a material under study helps simplify a shock experiment by effectively allowing one to measure an in situ particle velocity. The shock impedance of magnesium oxide (MgO) falls roughly midway between those of sapphire and LiF, two of the most frequently used VISAR window materials. A series of symmetric impact experiments was performed to characterize the suitability of single crystal, (100) oriented magnesium oxide as a VISAR window material. These experiments yielded good results and show the viability of MgO as a VISAR window up to 23 GPa. Results were used to determine window correction factors and, subsequently, to estimate the pressure induced change in index of refraction. In many of the shots in this work we exceeded the Hugoniot elastic limit (HEL) of MgO, and both elastic and plastic waves are evident in the velocity profiles. The presence of both waves within the VISAR window complicates the typical VISAR window correction analysis. Preliminary analysis of the elastic and plastic contributions to the window correction is presented.

G. D. Stevens; L. R. Veeser; P. A. Rigg; R. S. Hixson

2005-01-01T23:59:59.000Z

332

Comparison of the Thermal Performance of a Solar Heating System with Open and Closed Solid Sorption Storage  

Science Journals Connector (OSTI)

Abstract The aim of this paper is to compare two solar heating systems with different solid sorption storage concepts; an open storage concept with material transport and external reactor and a closed sorption storage concept with the material reservoir as reactor. Both storage concepts are part of system concepts that have been investigated during national projects for a period of more than 3 years each. A TRNSYS model has been developed for each concept and the corresponding mathematical model is described. An emphasis is given on the model simplifications and thus its up- and downscaling possibilities. TRNSYS simulation studies were performed using similar boundary conditions. Hence the simulation results can be compared directly, thus the advantages and disadvantages of both concepts under investigation can be elaborated and assessed. TRNSYS simulations have been performed for each system concept using the properties of two different thermochemical storage materials (TCM). It is shown that the type of TCM has a significant influence on the systems fractional thermal energy savings. Using silica gel as TCM, both system concepts’ performances are only slightly better compared to a standard water-filled storage tank of the same size. The TCM zeolite 13 XBF, a binder free 13 X zeolite, leads to significantly better fractional thermal energy savings. Although the two systems under investigation behave differently, the fractional thermal energy savings are similar. High solar thermal fractions up to a complete solar coverage can be achieved for both storage concepts with moderate collector array and store sizes.

Florian Bertsch; Dagmar Jaehnig; Sebastian Asenbeck; Henner Kerskes; Harald Drueck; Waldemar Wagner; Werner Weiss

2014-01-01T23:59:59.000Z

333

Final Report: Use of Graphite Foam as a Thermal Performance Enhancement of Heavy Hybrid Propulsion Systems  

SciTech Connect

Oak Ridge National Laboratory's graphite foam has the potential to be used as a heat exchanger for the Army's Future Combat System Manned Ground Vehicle and thus has the potential to improve its thermal performance. The computational fluid dynamics (CFD) program FLOW3D was used to develop a new CFD model for the graphite foam to be used in the development of a proper heat exchanger. The program was calibrated by first measuring the properties of the solid foams and determining the parameters to be used in the CFD model. Then the model was used to predict within 5% error the performance of finned foam heat sinks. In addition, the f factors and j factors commonly used to predict pressure drop and heat transfer were calculated for both the solid and finned structures. There was some evidence that corrugating the foams would yield higher j/f ratios than state of the art heat exchangers, confirming previously measured data. Because the results show that the CFD model was validated, it is recommended that the funding for Phases 2 through 5 be approved for the design of both the finned heat exchanger using tubes and round fin structures and the solid foam design using corrugated foams. It was found that the new CFD model using FLOW3D can predict both solid foam heat transfer and finned foam heat transfer with the validated model parameters. In addition, it was found that the finned foam structures exhibited j/f ratios that indicate that significant heat transfer is occurring within the fin structures due to aerodynamically induced flow, which is not present in solid aluminum fin structures. It is possible that the foam surfaces can act as turbulators that increase heat transfer without affecting pressure drop, like the vortex generators seen in state of the art heat exchangers. These numbers indicate that the foam can be engineered into an excellent heat exchanger. It was also found that corrugating the solid foams would increase the j/f ratio dramatically, allowing the solid foams to compete directly with standard heat exchangers. Although corrugated L1 foam samples have not been produced (attempts are under way), it is possible that their j/f ratio can be even higher than those of the finned structures.

Klett, James William [ORNL; Conklin, Jim [ORNL

2011-06-01T23:59:59.000Z

334

SST: A Scalable Parallel Framework for Architecture-Level Performance, Power, Area and Thermal Simulation  

Science Journals Connector (OSTI)

......thermal simulation tool used for estimating chip-wide temperature based on...cores together does not derive more benefit from cache sharing compared with...Cognitive Packet Network. Int. Conf. Smart Grids, Green Communications, and IT......

Ming-yu Hsieh; Rolf Riesen; Kevin Thompson; William Song; Arun Rodrigues

2012-02-01T23:59:59.000Z

335

Thermal-performance study of liquid metal fast breeder reactor insulation  

SciTech Connect

Three types of metallic thermal insulation were investigated analytically and experimentally: multilayer reflective plates, multilayer honeycomb composite, and multilayer screens. Each type was subjected to evacuated and nonevacuated conditions, where thermal measurements were made to determine thermal-physical characteristics. A variation of the separation distance between adjacent reflective plates of multilayer reflective plates and multilayer screen insulation was also experimentally studied to reveal its significance. One configuration of the multilayer screen insulation was further selected to be examined in sodium and sodium oxide environments. The emissivity of Type 304 stainless steel used in comprising the insulation was measured by employing infrared technology. A comprehensive model was developed to describe the different proposed types of thermal insulation. Various modes of heat transfer inherent in each type of insulation were addressed and their relative importance compared. Provision was also made in the model to allow accurate simulation of possible sodium and sodium oxide contamination of the insulation. The thermal-radiation contribution to heat transfer in the temperature range of interest for LMFBR's was found to be moderate, and the suppression of natural convection within the insulation was vital in preserving its insulating properties. Experimental data were compared with the model and other published results. Moreover, the three proposed test samples were assessed and compared under various conditions as viable LMFBR thermal insulations.

Shiu, Kelvin K.

1980-09-01T23:59:59.000Z

336

Photo of the Week: The First Energy-Efficient Dual-Paned Windows |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

The First Energy-Efficient Dual-Paned Windows The First Energy-Efficient Dual-Paned Windows Photo of the Week: The First Energy-Efficient Dual-Paned Windows December 5, 2013 - 12:53pm Addthis Researchers at Berkeley Lab helped develop the first energy-efficient dual-paned windows, now used in buildings and homes worldwide for billions of dollars in energy savings. Current windows research in the Environmental Energy Technologies Division at Berkeley Lab is aimed at developing new glazing materials, windows simulation software and other advanced high-performance window systems. The building shown here, located at Berkeley Lab, is a windows testing facility. | Photo courtesy of Roy Kaltschmidt, Lawrence Berkeley National Laboratory. Researchers at Berkeley Lab helped develop the first energy-efficient

337

Experimental evaluation of 350 MHz RF accelerator windows for the low energy demonstration accelerator  

SciTech Connect

Radio frequency (RF) windows are historically a point where failure occurs in input power couplers for accelerators. To obtain a reliable, high-power, 350 MHz RF window for the Low Energy Demonstration Accelerator (LEDA) project of the Accelerator Production of Tritium program, RF windows prototypes from different vendors were tested. Experiments were performed to evaluate the RF windows by the vendors to select a window for the LEDA project. The Communications and Power, Inc. (CPI) windows were conditioned to 445 kW in roughly 15 hours. At 445 kW a window failed, and the cause of the failure will be presented. The English Electronic Valve, Inc. (EEV) windows were conditioned to 944 kW in 26 hours and then tested at 944 kW for 4 hours with no indication of problems.

Cummings, K.; Rees, D.; Roybal, W. [and others

1997-09-01T23:59:59.000Z

338

LBNL Window & Daylighting Software -- WINDOW 6 Research Version  

NLE Websites -- All DOE Office Websites (Extended Search)

2 2 Last Updated: 12/29/2013 If you find bugs, or have comments about this version, please do not hesitate to send an email to WINDOWHelp@lbl.gov to report your findings. Getting feedback from users is how we improve the program. WINDOW 7.2 (7.2.29) (12/29/2013) Release Notes -- Please read these before running this version ! This version contains these new modeling features Honeycomb shades Dynamic Glazing (Thermochromic and Electrochromic) This version is compatible with THERM 7.1 Please send us emails as you find issues in the program -- that is the only way that we can make it more robust. We hope to iterate versions fairly quickly in the next month or so to get the bugs ironed out. Radiance for WINDOW 7 Get a copy of Radiance for WINDOW 7.2 Must be used with WINDOW 7.0.59 or later

339

LBNL Windows & Daylighting Software -- WINDOW5: Knowledge Base  

NLE Websites -- All DOE Office Websites (Extended Search)

6.3 Knowledge Base 6.3 Knowledge Base Tip - use the Find function in your browser to search this page Last update:11/04/13 01:16 PM Download WINDOW 6.3 Send feedback via email to WindowHelp@lbl.gov. Also as bugs and comments are submitted by testers, the will be posted on this Knowledge Base, so check here for the latest information about the program. CONTENTS INSTALLATION KNOWN BUGS ** Operating Systems -- Microsoft Windows 7 and Vista ** Environmental Conditions -- Kimura convection model not working Locked Files with Install/De-install Environmental Conditions -- Fixed Combined Coefficient Bug Installation Problems Error Message during Calc due to decimal point of "," Minimum computer requirements Importing THERM file into WINDOW generates "Unnamed file has a bad format" error message

340

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Storm Windows Storm Windows Window Attachments For detailed information on storm windows and other window attachments, visit www.windowattachments.org exit disclaimer , a site supported by Lawrence Berkeley National Laboratory, Building Green, and the U.S. Department of Energy. DOE's Energy Savers You can improve the energy efficiency of existing windows by adding interior or exterior storm panels. Storm Window Panels exit disclaimer Storm windows can reduce the air leakage and improve the insulating value of existing windows. They can be installed on the interior or exterior side of windows, and can be mounted permanently or for seasonal use. Interior storm windows can be more easily installed and removed for ventilation or cleaning. Storm windows can reduce air leakage. However, it is important that humid

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Solar Control Window Film Solar Control Window Film Window Attachments For detailed information on storm windows and other window attachments, visit www.windowattachments.org exit disclaimer , a site supported by Lawrence Berkeley National Laboratory, Building Green, and the U.S. Department of Energy. DOE's Energy Savers You can improve the energy efficiency of existing windows by applying a film. High-Reflectivity Window Films exit disclaimer International Window Film Association For more information on window film, check the Window Film Information Center exit disclaimer . Solar control window film reduces solar heat gain by reflection and absorption. As they also block solar heat gain in winter months, these films are ideal for cooling-dominated climates. Window films can be tinted

342

Electron gun with cylindrical window  

SciTech Connect

This paper describes a three-electrode electron gun with a foil window in the form of a cylinder 300 mm in diameter and 200 mm high. With an accelerating voltage of 140 kV in the pulse mode (10 usec at 2 Hz) with grid modulation, the current extracted from the foil is 5.5 A. The ratio of the window area to the mass of the gun (23.7 cm/sup 2//kg) is greater by a factor of 3-5 than that of similar guns with flat windows.

Grigorev, Y.V.; Stepanov, A.V.

1986-01-01T23:59:59.000Z

343

High-Efficiency Window Air Conditioners - Building America Top...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Window Air Conditioners - Building America Top Innovation This photo shows a window air conditioning unit in place in a window frame. Window air conditioners are inexpensive,...

344

Copper Doped GaAs Infrared Filter for the 8-13 m Atmospheric Window  

E-Print Network (OSTI)

regions of interest, such as atmospheric transmission windows. Filters exclude solar or thermal photonsCdTe is typically melt grown in a high temperature furnace. All three elements in this alloy are toxic. Stability

Peale, Robert E.

345

High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems; Volume 6 Building America Best Practices Series  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

by by Pacific Northwest National Laboratory & Oak Ridge National Laboratory June 4, 2007 June 2007 * NREL/TP-550-41085 PNNL-16362 High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems Building America Best Practices Series Volume 6 High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems Building America Best Practices Series Prepared by Pacific Northwest National Laboratory, a DOE national laboratory Michael C. Baechler Theresa Gilbride, Kathi Ruiz, Heidi Steward and Oak Ridge National Laboratory, a DOE national laboratory Pat M. Love June 4, 2007 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor Battelle Memorial Institute, nor any of their employees, makes any warranty,

346

Windows and Building Envelope | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and market challenges in the windows and building envelope sector. Image: National Renewable Energy Laboratory Read more Insulation and Window Projects Named as Top Energy...

347

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Triple Low-E Glazing Triple Low-E Glazing Triple-Glazed, High-solar-gain Low-E Glass This figure illustrates the performance of a window with a very low heat loss rate (low U-factor). In this case there are three glazing layers and two low-E coatings, ½" argon gas or ¼" krypton gas fill between glazings, and low-conductance edge spacers. The middle glazing layer can be glass or suspended plastic film. Some windows use four glazing layers (two glass layers and two suspended plastic films). This product is suited for buildings located in very cold climates. Both Low-E coatings in this product have high solar heat and visible light transmittance, which is ideal for passive solar design. The use of three layers, however, results in lower solar heat gain relative to double glazing with high-solar-gain Low-E.

348

Study on Performance Verification and Evaluation of District Heating and Cooling System Using Thermal Energy of River Water  

E-Print Network (OSTI)

September 16, 2014 NIKKEN SEKKEI Research Institute Naoki Takahashi Study on Performance Verification and Evaluation of District Heating and Cooling System Using Thermal Energy of River Water ESL-IC-14-09-19 Proceedings of the 14th International... of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14-17, 2014 District heating and cooling system in Nakanoshima 4 Characteristics of heat supply plant in Nakanoshima district -River water is utilized as heat...

Takahashi,N.; Niwa, H.; Kawano,M.; Koike,K.; Koga,O.; Ichitani, K.; Mishima,N.

2014-01-01T23:59:59.000Z

349

IN-SITU MEASUREMENT OF WALL THERMAL PERFORMANCE: DATA INTERPRETATION AND APPARATUS DESIGN RECOMMENDATIONS  

E-Print Network (OSTI)

Unit (ETTU): Field Measurement of Wall Performance, Presented at Third International Symposium on Energy

Modera, M.P.; Sherman, M.H.; de Vinuesa, S.G.

2008-01-01T23:59:59.000Z

350

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Window Technologies: Operator Types Window Technologies: Operator Types Window Sash Operation When you select a window, there are numerous operating types to consider. Traditional operable window types include the projected or hinged types such as casement, awning, and hopper, and the sliding types such as double- and single-hung and horizontal sliding. In addition, the window market includes fixed windows, storm windows, sliding and swinging patio doors, skylights and roof windows, and window systems that can be added to a house to create bay or bow windows, miniature greenhouses, or full sun rooms. Looking for information on skylights? More information on skylights, light tubes, and their installation can be found here. Casement Casement windows are hinged at the sides. Hinged windows such as casements generally have lower air leakage rates than sliding windows from the same manufacturer because the sash closes by pressing against the frame. Casement windows project outward, providing significantly better ventilation than sliders of equal size. Because the sash protrudes from the plane of the wall, it can be controlled to catch passing breezes, but screens must be placed on the interior side. Virtually the entire casement window area can be opened, while sliders are limited to less than half of the window area. Casement

351

Numerical Simulation of Thermal Performance of Floor Radiant Heating System with Enclosed Phase Change Material  

E-Print Network (OSTI)

of the energy storage floor is designed,which places heat pipes in the enclosed phase change material (PCM) layer, without concrete in it. The PCM thermal storage time is studied in relation to the floor surface temperature under different low-temperature hot...

Qiu, L.; Wu, X.

2006-01-01T23:59:59.000Z

352

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-E Glazing Low-E Glazing Double-Glazed, High-solar-gain Low-E Glass This figure illustrates the characteristics of a typical double-glazed window with a high-solar gain low-E glass with argon gas fill. These windows are designed to reduce heat loss but admit solar gain. High-solar-gain low-E glass products are best suited for buildings located in heating-dominated climates and are the product of choice for passive solar design projects. High-solar-gain low-E glass is often made with pyrolytic low-E coatings, although sputtered high-solar-gain low-E is also available. Double HSG Low-E Center of Glass Properties Note: These values are for the center of glass only. They should only be used to compare the effect of different glazing types, not to compare total window products. Frame choice can drastically affect performance. These values represent double glazing with a 1/2" air gap.

353

CMU-ITC-86-045 , Windowing  

E-Print Network (OSTI)

on window-manager style graphics systems using the Tek termi- nals, inspired by some film Alan Kay showedCMU-ITC-86-045 , Windowing Systems , Implementations #12;#12;Window System Implementations Denver ABSTRACT Notes for a course given at the 1986 Winter Usenix meeting in Denver, CO. It covers window systems

354

Covered Product Category: Residential Windows, Doors, and Skylights |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Residential Windows, Doors, and Skylights Residential Windows, Doors, and Skylights Covered Product Category: Residential Windows, Doors, and Skylights October 7, 2013 - 11:22am Addthis ENERGY STAR Qualified Products FEMP provides acquisition guidance across a variety of product categories, including residential windows, doors, and skylights, which are an ENERGY STAR®-qualified product category. Federal laws and executive orders mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law. Most manufacturers display the ENERGY STAR label on complying models. For a model not displaying this label, check the manufacturer's literature to determine if it meets the efficiency requirements outlined by ENERGY STAR. Performance Requirements for Federal Purchases

355

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Repair Existing Windows Repair Existing Windows Lead Paint and Window Replacement: Challenges and Opportunities In older homes, windows are a likely source of lead contamination in homes. Dust from lead paint can create serious health problems, especially in young children. While window replacement can increase lead dust during renovation, it can also permanently eliminate lead hazards by removing lead-painted windows. Download fact sheet» A variety of options exist for improving the energy-efficiency of your existing windows. Before investing in these options, check your windows for potential issues that may call for replacement instead: Moisture and mold between window frame and wall: If water and water vapors are allowed to penetrate around the window frame, the moisture can

356

Modeling, design and thermal performance of a BIPV/T system thermally coupled with a ventilated concrete slab in a low energy solar house: Part 2, ventilated concrete slab  

SciTech Connect

This paper is the second of two papers that describe the modeling and design of a building-integrated photovoltaic-thermal (BIPV/T) system thermally coupled with a ventilated concrete slab (VCS) adopted in a prefabricated, two-storey detached, low energy solar house and their performance assessment based on monitored data. The VCS concept is based on an integrated thermal-structural design with active storage of solar thermal energy while serving as a structural component - the basement floor slab ({proportional_to}33 m{sup 2}). This paper describes the numerical modeling, design, and thermal performance assessment of the VCS. The thermal performance of the VCS during the commissioning of the unoccupied house is presented. Analysis of the monitored data shows that the VCS can store 9-12 kWh of heat from the total thermal energy collected by the BIPV/T system, on a typical clear sunny day with an outdoor temperature of about 0 C. It can also accumulate thermal energy during a series of clear sunny days without overheating the slab surface or the living space. This research shows that coupling the VCS with the BIPV/T system is a viable method to enhance the utilization of collected solar thermal energy. A method is presented for creating a simplified three-dimensional, control volume finite difference, explicit thermal model of the VCS. The model is created and validated using monitored data. The modeling method is suitable for detailed parametric study of the thermal behavior of the VCS without excessive computational effort. (author)

Chen, Yuxiang; Galal, Khaled; Athienitis, A.K. [Dept. of Building, Civil and Environmental Engineering, Concordia University, 1455 De Maisonneuve West, EV6.139, Montreal, Quebec (Canada)

2010-11-15T23:59:59.000Z

357

Market Transformation Efforts for Residential Energy-Efficient Windows: An Update of National Activities  

NLE Websites -- All DOE Office Websites (Extended Search)

Transformation Efforts for Residential Energy Efficient Windows: Transformation Efforts for Residential Energy Efficient Windows: An Update of National Activities Alecia Ward, Alliance to Save Energy Margaret Suozzo, American Council for an Energy Efficient Economy Joseph Eto, Lawrence Berkeley National Laboratory ABSTRACT With the burst of recent initiatives to accelerate adoption of energy-efficient fenestration technologies in the marketplace, an update on window market transformation efforts is needed. Because of the impact of glazing on total home energy performance, the residential window market has received increasing attention over the past two years. National programs such as the ENERGY STAR Windows program, the Efficient Windows Collaborative, and regional initiatives such as the California Windows Initiative and the

358

Effects of Framing on the Thermal Performance of Wood and Steel-Framed Walls  

E-Print Network (OSTI)

members as well as insulation imperfections [13]. Building load calculation programs like Manual J [14] also does not incorporate these thermal anomalies. Previous ORNL research demonstrated that about 10% to 15% of the US residential energy consumption... of nominal 2x4 inch wood and steel-framed walls insulated with R-13 h·ft 2 ·ºF/BTU (3.5-in. thick) fiberglass batts were tested in the ORNL guarded hot box in accordance with ASTM C 1363. In these walls, nominal 2x4 inch wood or steel studs were constructed...

Kosny, J.; Yarbrough, D. W.; Childs, P.; Mohiuddin, S. A.

2006-01-01T23:59:59.000Z

359

Energy Savings from Window Attachments  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

from from Window Attachments October 2013 Prepared for: Building Technologies Office Office of Energy Efficiency and Renewable Energy U.S. Department of Energy Prepared by: Lawrence Berkeley National Laboratory October 2013 Prepared for: Building Technologies Office Office of Energy Efficiency and Renewable Energy U.S. Department of Energy Prepared By: Lawrence Berkeley National Laboratory One Cyclotron Road, MS 90R3111 Berkeley, CA 94720 Authors: D. Charlie Curcija Mehry Yazdanian Christian Kohler Robert Hart Robin Mitchell Simon Vidanovic 1 ENERGY SAVINGS FROM WINDOW ATTACHMENTS TABLE OF CONTENTS: TABLE OF CONTENTS:................................................................................................... 1 1. EXECUTIVE SUMMARY ......................................................................................... 3

360

Energy Savings from Window Attachments  

NLE Websites -- All DOE Office Websites (Extended Search)

from from Window Attachments October 2013 Prepared for: Building Technologies Office Office of Energy Efficiency and Renewable Energy U.S. Department of Energy Prepared by: Lawrence Berkeley National Laboratory October 2013 Prepared for: Building Technologies Office Office of Energy Efficiency and Renewable Energy U.S. Department of Energy Prepared By: Lawrence Berkeley National Laboratory One Cyclotron Road, MS 90R3111 Berkeley, CA 94720 Authors: D. Charlie Curcija Mehry Yazdanian Christian Kohler Robert Hart Robin Mitchell Simon Vidanovic 1 ENERGY SAVINGS FROM WINDOW ATTACHMENTS TABLE OF CONTENTS: TABLE OF CONTENTS:................................................................................................... 1 1. EXECUTIVE SUMMARY ......................................................................................... 3

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Influence of EB-PVD TBC Microstructure on Thermal Barrier Coating System Performance Under Cyclic Conditions  

SciTech Connect

The lifetimes of electron beam physical vapor deposited (EB-PVD) thermal barrier coating systems (TBCs) with three different microstructures of the Y2O3-stabilized ZrO, YSZ) ceramic top layer were investigated in lh thermal cycles at 1100 and 1150°C in flowing oxygen. Single crystal alloys CMSX-4 and Rene N5 that had been coated with an EB-PVD NiCoCrAlY bond coat were chosen as substrate materials. At 1150°C all samples failed after 80-100, lh cycles, predominantly at the bond coat/alumina interface after cooling down from test temperature. The alumina scale remained adherent to the YSZ after spallation. Despite the different YSZ microstructures no clear tendency regarding differences in spallation behavior were observed at 1150°C. At 1100°C the minimum lifetime was 750 , lh cycles for CMSX-4, whereas the first Rene N5 specimen failed after 1750, lh cycles. The longest TBC lifetime on CMSX-4 substrates was 1250, lh cycles, whereas the respective Rene N5 specimens have not yet failed after 2300, lh cycles. The failure mode at 1100°C was identical to that at 115O?C, i.e. the TBC spalled off the surface exposing bare metal after cooling. Even though not all specimens have failed to date, the available results at 1100°C suggested that both, the substrate alloy chemistry and the YSZ microstructure significantly affect the spallation resistance of the TBC.

Leyens, C.; Pint, B.A.; Schulz, U.; Wright, I.G.

1999-04-12T23:59:59.000Z

362

3.4 Timeline Zoomable Window  

NLE Websites -- All DOE Office Websites (Extended Search)

.1 Zoomable and Scrollable Up: 3. Graphical User Interface .1 Zoomable and Scrollable Up: 3. Graphical User Interface Previous: 3.3 Legend Window Contents 3.4 Timeline Zoomable Window Figure 3.10: Initial display of the Timeline window of a 514 MB 16-process slog2 file with default preview resolution. Image timeline_popup Most of the advanced features in the SLOG-2 viewer are provided through a zoomable window. Jumpshot-4 has two zoomable windows: Timeline and Histogram. Figure 3.10 is the initial display of the Timeline window of a half-gigabyte 16-timeline slog2 file. The zoomable window consists of several concealable and removable components. In the center of the window is the zoomable and scrollable canvas. For the Timeline window, the center canvas is called the timeline canvas. Directly on top of the zoomable

363

Learning Windows Ibraheem A. Alhashim  

E-Print Network (OSTI)

. They suggest using a trainable classifier to learn a distance function that improves their fitting procedure. However, they do not implement such classifier and relay on a heuristic derived from their experimentation to ground truth of 744 windows from 40 test images. We will use a subset of the database they used for our

Zhang, Richard "Hao"

364

NREL Evaluates the Thermal Performance of Uninsulated Walls to Improve the Accuracy of Building Energy Simulation Tools (Fact Sheet)  

SciTech Connect

This technical highlight describes NREL research to develop models of uninsulated wall assemblies that help to improve the accuracy of building energy simulation tools when modeling potential energy savings in older homes. Researchers at the National Renewable Energy Laboratory (NREL) have developed models for evaluating the thermal performance of walls in existing homes that will improve the accuracy of building energy simulation tools when predicting potential energy savings of existing homes. Uninsulated walls are typical in older homes where the wall cavities were not insulated during construction or where the insulating material has settled. Accurate calculation of heat transfer through building enclosures will help determine the benefit of energy efficiency upgrades in order to reduce energy consumption in older American homes. NREL performed detailed computational fluid dynamics (CFD) analysis to quantify the energy loss/gain through the walls and to visualize different airflow regimes within the uninsulated cavities. The effects of ambient outdoor temperature, radiative properties of building materials, and insulation level were investigated. The study showed that multi-dimensional airflows occur in walls with uninsulated cavities and that the thermal resistance is a function of the outdoor temperature - an effect not accounted for in existing building energy simulation tools. The study quantified the difference between CFD prediction and the approach currently used in building energy simulation tools over a wide range of conditions. For example, researchers found that CFD predicted lower heating loads and slightly higher cooling loads. Implementation of CFD results into building energy simulation tools such as DOE2 and EnergyPlus will likely reduce the predicted heating load of homes. Researchers also determined that a small air gap in a partially insulated cavity can lead to a significant reduction in thermal resistance. For instance, a 4-in. tall air gap (Figure 1a) led to a 15% reduction in resistance. Similarly, a 2-ft tall air gap (Figure 1c) led to 54% reduction in thermal resistance. NREL researchers plan to extend this study to include additional wall configurations, and also to evaluate the performance of attic spaces with different insulation levels. NREL's objective is to address each potential issue that leads to inaccuracies in building energy simulation tools to improve the predictions.

Not Available

2012-01-01T23:59:59.000Z

365

LBNL Window & Daylighting Software -- RESFEN  

NLE Websites -- All DOE Office Websites (Extended Search)

SYSTEM REQUIREMENTS GET A COPY DOCUMENTATION KNOWLEDGE BASE Overview Today's energy-efficient windows can dramatically lower the heating and cooling costs associated with windows while increasing occupant comfort and minimizing window surface condensation problems. However, consumers are often confused about how to pick the most efficient window for a residence. Product information typically offers window properties: U-factors or R-values, Solar Heat Gain Coefficients or Shading Coefficients, and air leakage rates. However, the relative importance of these properties depends on site- and building-specific conditions. Furthermore, these properties are based on static evaluation conditions that are very different from the real situation a window will be used in.

366

WINDOW 6.2/THERM 6.2 Research Version User Manual  

NLE Websites -- All DOE Office Websites (Extended Search)

WINDOW 6.2/THERM 6.2 Research Version User Manual WINDOW 6.2/THERM 6.2 Research Version User Manual Title WINDOW 6.2/THERM 6.2 Research Version User Manual Publication Type Report LBNL Report Number LBNL-813E Year of Publication 2008 Authors Mitchell, Robin, Christian Kohler, Joseph H. Klems, Michael D. Rubin, Dariush K. Arasteh, Charlie Huizenga, Tiefeng Yu, and Dragan C. Curcija Call Number LBNL-813E Abstract WINDOW 6 and THERM 6 Research Versions are software programs developed at Lawrence Berkeley National Laboratory (LBNL) for use by manufacturers, engineers, educators, students, architects, and others to determine the thermal and solar optical properties of glazing and window systems. WINDOW 6 and THERM 6 are significant updates to LBNL's WINDOW 5 and THERM 5 computer program because of the added capability to model complex glazing systems, such as windows with shading systems, in particular venetian blinds. Besides a specific model for venetian blinds and diffusing layers, WINDOW 6 also includes the generic ability to model any complex layer if the Transmittance and Reflectance are known as a function of incoming and outgoing angles.

367

LBNL Window & Daylighting Software -- WINDOW 6 Research Version  

NLE Websites -- All DOE Office Websites (Extended Search)

(6.3.9) (6.3.9) October 2010 Last Updated: 11/07/2010 Complex Glazing Features for WINDOW6 The Research Version of WINDOW 6 has the following modeling capabilities: Shading Layer Library: A Shading Layer Library has been added to define shading systems, such as venetian blinds and diffusing layers, which can then be added as layers in the Glazing System Library. Shade Material Library: A Shading Material Library has been added to define materials to be used in the Shading Layer Library. Properties defined in this library include shade material reflectance and absorptance (in the solar, visible and IR wavelengths ranges), as well as the conductivity of the material. Glazing System Library In the “Layers” section of the Glazing System definition, it is now possible to specify either a glass layer or a shading layer. The shading system is chosen from the Shading Layer Library.

368

Mickey Leland Energy Fellowship Report: Development of Advanced Window Coatings  

SciTech Connect

Advanced fenestration technologies for light and thermal management in building applications are of great recent research interest for improvements in energy efficiency. Of these technologies, there is specific interest in advanced window coating technologies that have tailored control over the visible and infrared (IR) scattering into a room for both static and dynamic applications. Recently, PNNL has investigated novel subwavelength nanostructured coatings for both daylighting, and IR thermal management applications. Such coatings rese still in the early stages and additional research is needed in terms of scalable manufacturing. This project investigates aspects of a potential new methodology for low-cost scalable manufacture of said subwavelength coatings.

Bolton, Ladena A.; Alvine, Kyle J.; Schemer-Kohrn, Alan L.

2014-08-05T23:59:59.000Z

369

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Sash Replacement Sash Replacement DIY Network: How to Install a Window Sash Replacement Kit The DIY Network experts show you how to remove the window sash from an old double-hung window and install a new energy-saving sash replacement kit: How to Install a Window Sash Replacement Kit exit disclaimer . Sash replacement may be an alternative to a full window replacement or an insert window into an existing frame. The physical condition of the existing window must be good-there should be no moisture or air leakage. An energy auditor or replacement contractor may help you determine if a sash replacement is a viable option based on your homes window and wall conditions. Many manufacturers offer replacement sash kits, which include jamb liners to ensure good operability and fit. This option allows for relatively easy

370

IT Administrator's Guide to Using Windows Vista  

E-Print Network (OSTI)

IT Administrator's Guide to Using Windows Vista® for Sustainable IT Success Published: February Administrator's Guide to Using Windows Vista for Sustainable IT Success Contents Executive Summary ................................................................................................ 3 Sustainable IT Goals

Narasayya, Vivek

371

Active charge/passive discharge solar heating systems: thermal analysis and performance comparisons  

SciTech Connect

This study analyzes the performance of active charge/passive discharge solar space heating systems. This type of system combines liquid-cooled solar collector panels with a massive integral storage component that passively heats the building interior by radiation and free convection. The TRNSYS simulation program is used to evaluate system performance and to provide input for the development of a simplified analysis method. This method, which provides monthly calculations of delivered solar energy, is based on Klein's Phi-bar procedure and data from hourly TRNSYS simulations. The method can be applied to systems using a floor slab, a structural wall, or a water tank as the storage component. Important design parameters include collector area and orientation, building heat loss, collector and heat-exchanger efficiencies, storage capacity, and storage-to-room coupling. Performance simulation results are used for comparisons with active and passive solar designs. Economic comparisons are based on these data and additional system features, such as cooling augmentation and integration of heating components with structural members.

Swisher, J.

1981-06-01T23:59:59.000Z

372

Monitoring and simulation of the thermal performance of solar heated outdoor swimming pools  

SciTech Connect

Based on detailed measurements of two outdoor swimming pools (at Leonberg and Moehringen) a computer model has been developed and validated for the simulation of the thermal behaviour of such pools. The subroutine is compatible to TRNSYS 13.1. Correlations for the heat losses due to evaporation, convection, and radiation were taken from literature and tested in the model. It was not possible to select one optimal correlation for the description of the evaporative heat losses of both swimming pools due to the different exposure to wind. Using the most suitable correlation for the evaporative heat losses of each pool allowed for the simulation of the pool temperature with less than 0.5 K standard deviation between measured and simulated temperature. the major problem was the measurement of the relevant wind speed to be used in the correlations describing the evaporative heat losses under real outdoor conditions. A method is described detailing how to calibrate the model using the heating energy requirement and the measured pool temperature during actual operation periods. The analysis of the measured data of two different outdoor swimming pools under the same climatic conditions showed differences of a factor 2 and more in the heat demand per unit pool area. This was mainly caused by the difference in local wind speed which differed by more than a factor 4. The two pools investigated were heated by solar energy with a fraction of 28% and 14%, respectively, and the seasonal efficiency of the solar systems was 37.7% and 33.4%. Simulations show that a reduction of the water temperature from 24[degrees]C to 22[degrees]C during periods with low outdoor temperatures and few visitors, reduces the fuel consumption to less than half and increases the solar fraction from 28% to 50% in one pool.

Hahne, E.; Kuebler, R. (Universitaet Stuttgart (Germany))

1994-07-01T23:59:59.000Z

373

Simulating Complex Window Systems using BSDF Data  

E-Print Network (OSTI)

Daylighting, Design tools and methods INTRODUCTION Simulations enable designers and engineers to evaluate and select the best available window solutions

Konstantoglou, Maria

2011-01-01T23:59:59.000Z

374

Thermal-hydraulic performance of a water-cooled tungsten-rod target for a spallation neutron source  

SciTech Connect

A thermal-hydraulic (T-H) analysis is conducted to determine the feasibility and limitations of a water-cooled tungsten-rod target at powers of 1 MW and above. The target evaluated has a 10-cm x 10-cm cross section perpendicular to the beam axis, which is typical of an experimental spallation neutron source - both for a short-pulse spallation source and long-pulse spallation source. This report describes the T-H model and assumptions that are used to evaluate the target. A 1-MW baseline target is examined, and the results indicate that this target should easily handle the T-H requirements. The possibility of operating at powers >1 MW is also examined. The T-H design is limited by the condition that the coolant does not boil (actual limits are on surface subcooling and wall heat flux); material temperature limits are not approached. Three possible methods of enhancing the target power capability are presented: reducing peak power density, altering pin dimensions, and improving coolant conditions (pressure and temperature). Based on simple calculations, it appears that this target concept should have little trouble reaching the 2-MW range (from a purely T-H standpoint), and possibly much higher powers. However, one must keep in mind that these conclusions are based solely on thermal-hydraulics. It is possible, and perhaps likely, that target performance could be limited by structural issues at higher powers, particularly for a short-pulse spallation source because of thermal shock issues.

Poston, D.I.

1997-08-01T23:59:59.000Z

375

A Design Guide for Early-Market Electrochromic Windows  

E-Print Network (OSTI)

Guide for Early-Market Electrochromic Windows. CaliforniaGuide for Early-Market Electrochromic Windows. CaliforniaGUIDE FOR EARLY-MARKET ELECTROCHROMIC WINDOWS Prepared For:

2006-01-01T23:59:59.000Z

376

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Glazing Glazing Double-Glazed, Clear Glass This figure illustrates the performance of a typical double-glazed unit with two lites of clear glass. The inner and outer layers of glass are both clear and separated by an air gap. Double glazing, compared to single glazing, cuts heat loss in half due to the insulating air space between the glass layers. In addition to reducing the heat flow, a double-glazed unit with clear glass will allow the transmission of high visible light and high solar heat gain. Double Clear Center of Glass Properties Note: These values are for the center of glass only. They should only be used to compare the effect of different glazing types, not to compare total window products. Frame choice can drastically affect performance. These values represent double glazing with a 1/2" air gap.

377

Thermal Decomposition of Bulk K-CoMoSx Mixed Alcohol Catalyst Precursors and Effects on Catalyst Morphology and Performance  

SciTech Connect

Cobalt molybdenum sulfide-type mixed alcohol catalysts were synthesized via calcination of precipitated bulk sulfides and studied with temperature programmed decomposition analysis. Precursors containing aqueous potassium were also considered. Precipitates thermally decomposed in unique events which released ammonia, carbon dioxide, and sulfur. Higher temperature treatments led to more crystalline and less active catalysts in general with ethanol productivity falling from 203 to 97 g (kg cat){sup -1} h{sup -1} when the calcination temperature was increased from 375 to 500 C. The addition of potassium to the precursor led to materials with crystalline potassium sulfides and good catalytic performance. In general, less potassium was required to promote alcohol selectivity when added before calcination. At calcination temperatures above 350 C, segregated cobalt sulfides were observed, suggesting that thermally decomposed sulfide precursors may contain a mixture of molybdenum and cobalt sulfides instead of a dispersed CoMoS type of material. When dimethyl disulfide was fed to the precursor during calcination, crystalline cobalt sulfides were not detected, suggesting an important role of free sulfur during decomposition.

Menart, M. J.; Hensley, J. E.; Costelow, K. E.

2012-09-26T23:59:59.000Z

378

Stanek Windows | Open Energy Information  

Open Energy Info (EERE)

Stanek Windows Stanek Windows Jump to: navigation, search Name Stanek Windows Address 4565 Willow Parkway Place Cuyahoga Heights, Ohio Zip 44125 Sector Buildings, Efficiency Product Consulting; Installation; Maintenance and repair;Manufacturing; Retail product sales and distribution;Trainining and education Phone number 216-341-7700 Website http://www.stanekwindows.com Coordinates 41.435755°, -81.650183° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.435755,"lon":-81.650183,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

379

Performance of a real-time local thermal management system for casting dies with multiple cooling channels  

Science Journals Connector (OSTI)

In high-pressure die casting processes, proper control of die temperature is essential for producing superior quality components and yielding high production rates. Very often it is impractical to control die temperature to a specific point during solidification stages. In this paper, a computerised Intelligent Real-Time Monitoring and Control System (IRMCS) is developed for die casting processes involving cooling of a die with multiple channels. A local temperature controller is designed to confine temperature fluctuations of a die within a desirable range. The performance of the system is evaluated through a laboratory die casting process simulator in terms of measurement accuracy, time delay and local heat removal rate. The experimental results indicate that the developed control system is capable of adjusting the desirable supply of cooling water into multiple cooling lines. Hence, the ideal thermal pattern of the die becomes achievable.

Tiebao Yang; Henry Hu; Xiang Chen; Yeou-li Chu; Patrick Cheng

2007-01-01T23:59:59.000Z

380

Optimization of building window system in Asian regions by analyzing solar heat gain and daylighting elements  

Science Journals Connector (OSTI)

This paper presents and optimizes the annual heating, cooling and lighting energy consumption associated with applying different types and properties of window systems in a building envelope. Through using building simulation modeling, various window properties such as U-value, solar heat gain coefficient (SHGC), and visible transmittance (Tvis) are evaluated with different window wall ratios (WWRs) and orientations in five typical Asian climates: Manila, Taipei, Shanghai, Seoul and Sapporo. By means of a regression analysis, simple charts for the relationship between window properties and building energy performance are presented as a function of U-value, SHGC, Tvis, WWR, solar aperture, effective aperture, and orientation. As a design guideline in selecting energy saving windows, an optimized window system for each climate is plotted in detailed charts and tables.

J.W. Lee; H.J. Jung; J.Y. Park; J.B. Lee; Y. Yoon

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Measuring the Optical Performance of Evacuated Receivers via an Outdoor Thermal Transient Test: Preprint  

SciTech Connect

Modern parabolic trough solar collectors operated at high temperatures to provide the heat input to Rankine steam power cycles employ evacuated receiver tubes along the collector focal line. High performance is achieved via the use of a selective surface with a high absorptance for incoming short-wave solar radiation and a low emittance for outgoing long-wave infrared radiation, as well as the use of a hard vacuum to essentially eliminate convective and conductive heat losses. This paper describes a new method that determines receiver overall optical efficiency by exposing a fluid-filled, pre-cooled receiver to one sun outdoors and measuring the slope of the temperature curve at the point where the receiver temperature passes the glass envelope temperature (that is, the point at which there is no heat gain or loss from the absorber). This transient test method offers the potential advantages of simplicity, high accuracy, and the use of the actual solar spectrum.

Kutscher, C.; Burkholder, F.; Netter, J.

2011-08-01T23:59:59.000Z

382

Thermal and Electrochemical Performance of a High-Temperature Steam Electrolysis Stack  

SciTech Connect

A research program is under way at the Idaho National Laboratory (INL) to simultaneously address the research and scale-up issues associated with the implementation of solid-oxide electrolysis cell technology for hydrogen production from steam. We are conducting a progression of electrolysis stack testing activities, at increasing scales, along with a continuation of supporting research activities in the areas of materials development, single-cell testing, detailed computational fluid dynamics (CFD) and systems modeling. This paper will present recent experimental results obtained from testing of planar solid-oxide stacks operating in the electrolysis mode. The hydrogen-production and electrochemical performance of these stacks will be presented, over a range of operating conditions. In addition, internal stack temperature measurements will be presented, with comparisons to computational fluid dynamic predictions.

J. O'Brien; C. Stoots; G. Hawkes; J. Hartvigsen

2006-11-01T23:59:59.000Z

383

State-of-the-Art Highly Insulating Window Frames - Research and Market  

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State-of-the-Art Highly Insulating Window Frames - Research and Market State-of-the-Art Highly Insulating Window Frames - Research and Market Review Title State-of-the-Art Highly Insulating Window Frames - Research and Market Review Publication Type Report LBNL Report Number LBNL-1133E Year of Publication 2007 Authors Gustavsen, Arlid, Bjørn Petter Jelle, Dariush K. Arasteh, and Christian Kohler Call Number LBNL-1133E Abstract This document reports the findings of a market and research review related to state-of-the-art highly insulating window frames. The market review focuses on window frames that satisfy the Passivhaus requirements (window U-value less or equal to 0.8 W/m2K), while other examples are also given in order to show the variety of materials and solutions that may be used for constructing window frames with a low thermal transmittance (U-value). The market search shows that several combinations of materials are used in order to obtain window frames with a low U-value. The most common insulating material seems to be Polyurethane (PUR), which is used together with most of the common structural materials such as wood, aluminum, and PVC.

384

Making Smart Windows Smarter | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Smart Windows Smarter Smart Windows Smarter Making Smart Windows Smarter April 5, 2011 - 2:00pm Addthis "Smart Windows" seen at light and dark settings. | Photo Courtesy of SAGE Electrochromics, Inc., by Susan Fleck Photography "Smart Windows" seen at light and dark settings. | Photo Courtesy of SAGE Electrochromics, Inc., by Susan Fleck Photography Roland Risser Roland Risser Program Director, Building Technologies Office What does this project do? Pleotint, LLC has developed a specialized glass film that uses the energy generated by the sun to limit excess heat and light from coming into homes and buildings. When you look out the window, you might notice whether the sun is shining, a nice view of the outdoors or an interesting cloud passing by. What most people probably don't notice is that traditional windows waste about 30

385

High Reliability R-10 Windows Using Vacuum Insulating Glass Units  

SciTech Connect

The objective of this effort was for EverSealed Windows (“EverSealed” or “ESW”) to design, assemble, thermally and environmentally test and demonstrate a Vacuum Insulating Glass Unit (“VIGU” or “VIG”) that would enable a whole window to meet or exceed the an R-10 insulating value (U-factor ? 0.1). To produce a VIGU that could withstand any North American environment, ESW believed it needed to design, produce and use a flexible edge seal system. This is because a rigid edge seal, used by all other know VIG producers and developers, limits the size and/or thermal environment of the VIG to where the unit is not practical for typical IG sizes and cannot withstand severe outdoor environments. The rigid-sealed VIG’s use would be limited to mild climates where it would not have a reasonable economic payback when compared to traditional double-pane or triple-pane IGs. ESW’s goals, in addition to achieving a sufficiently high R-value to enable a whole window to achieve R-10, included creating a VIG design that could be produced for a cost equal to or lower than a traditional triple-pane IG (low-e, argon filled). ESW achieved these goals. EverSealed produced, tested and demonstrated a flexible edge-seal VIG that had an R-13 insulating value and the edge-seal system durability to operate reliably for at least 40 years in the harshest climates of North America.

Stark, David

2012-08-16T23:59:59.000Z

386

Impacts of Soil and Pipe Thermal Conductivity on Performance of Horizontal Pipe in a Ground-source Heat Pump  

E-Print Network (OSTI)

In this paper the composition and thermal property of soil are discussed. The main factors that impact the soil thermal conductivity and several commonly-used pipe materials are studied. A model of heat exchanger with horizontal pipes of ground...

Song, Y.; Yao, Y.; Na, W.

2006-01-01T23:59:59.000Z

387

Performance improvement of CdS/Cu(In,Ga)Se2 solar cells after rapid thermal annealing  

Science Journals Connector (OSTI)

In this paper, we investigated the effect of rapid thermal annealing (RTA) on solar cell performance. An opto-electric conversion efficiency of 11.75% (Voc = 0.64 V, Jsc = 25.88 mA/cm2, FF=72.08%) was obtained under AM 1.5G when the cell was annealed at 300 ?C for 30 s. The annealed solar cell showed an average absolute efficiency 1.5% higher than that of the as-deposited one. For the microstructure analysis and the physical phase confirmation, X-ray diffraction (XRD), Raman spectra, front surface reflection (FSR), internal quantum efficiency (IQE), and X-ray photoelectron spectroscopy (XPS) were respectively applied to distinguish the causes inducing the efficiency variation. All experimental results implied that the RTA eliminated recombination centers at the p?n junction, reduced the surface optical losses, enhanced the blue response of the CdS buffer layer, and improved the ohmic contact between Mo and Cu(In, Ga)Se2 (CIGS) layers. This leaded to the improved performance of CIGS solar cell.

Chen Dong-Sheng (???); Yang Jie (? ?); Xu Fei (? ?); Zhou Ping-Hua (???); Du Hui-Wei (???); Shi Jian-Wei (???); Yu Zheng-Shan (???); Zhang Yu-Hong (???); Brian Bartholomeusz; Ma Zhong-Quan (???)

2013-01-01T23:59:59.000Z

388

Performance investigation of thermal energy storage system with Phase Change Material (PCM) for solar water heating application  

Science Journals Connector (OSTI)

Abstract In order to harvest solar energy, thermal energy storage (TES) system with Phase Change Material (PCM) has been receiving greater attention because of its large energy storage capacity and isothermal behavior during charging and discharging processes. In the present experimental study, shell and tube TES system using paraffin wax was used in a water heating system to analyze its performance for solar water heating application. Energy and exergy including their cost analyses for the TES system were performed. Accordingly, total life cycle cost was calculated for different flow rates of the Heat Transfer Fluid (HTF). With 0.033 kg/min and 0.167 kg/min flow rates of water as HTF, energy efficiencies experienced were 63.88% and 77.41%, respectively, but in exergy analysis, efficiencies were observed to be about 9.58% and 6.02%, respectively. Besides, the total life cycle cost was predicted to be $ 654.61 for 0.033 kg/min flow rate, which could be reduced to $ 609.22 by increasing the flow rate to 0.167 kg/min. Therefore it can be summarized that total life cycle cost decreases with the increase of flow rate.

M.H. Mahfuz; M.R. Anisur; M.A. Kibria; R. Saidur; I.H.S.C. Metselaar

2014-01-01T23:59:59.000Z

389

An automated vision-based method for rapid 3D energy performance modeling of existing buildings using thermal and digital imagery  

Science Journals Connector (OSTI)

Abstract Modeling the energy performance of existing buildings enables quick identification and reporting of potential areas for building retrofit. However, current modeling practices of using energy simulation tools do not model the energy performance of buildings at their element level. As a result, potential retrofit candidates caused by construction defects and degradations are not represented. Furthermore, due to manual modeling and calibration processes, their application is often time-consuming. Current application of 2D thermography for building diagnostics is also facing several challenges due to a large number of unordered and non-geo-tagged images. To address these limitations, this paper presents a new computer vision-based method for automated 3D energy performance modeling of existing buildings using thermal and digital imagery captured by a single thermal camera. First, using a new image-based 3D reconstruction pipeline which consists of Graphic Processing Unit (GPU)-based Structure-from-Motion (SfM) and Multi-View Stereo (MVS) algorithms, the geometrical conditions of an existing building is reconstructed in 3D. Next, a 3D thermal point cloud model of the building is generated by using a new 3D thermal modeling algorithm. This algorithm involves a one-time thermal camera calibration, deriving the relative transformation by forming the Epipolar geometry between thermal and digital images, and the MVS algorithm for dense reconstruction. By automatically superimposing the 3D building and thermal point cloud models, 3D spatio-thermal models are formed, which enable the users to visualize, query, and analyze temperatures at the level of 3D points. The underlying algorithms for generating and visualizing the 3D spatio-thermal models and the 3D-registered digital and thermal images are presented in detail. The proposed method is validated for several interior and exterior locations of a typical residential building and an instructional facility. The experimental results show that inexpensive digital and thermal imagery can be converted into ubiquitous reporters of the actual energy performance of existing buildings. The proposed method expedites the modeling process and has the potential to be used as a rapid and robust building diagnostic tool.

Youngjib Ham; Mani Golparvar-Fard

2013-01-01T23:59:59.000Z

390

Making the ‘rebound effect’ more useful for performance evaluation of thermal retrofits of existing homes: Defining the ‘energy savings deficit’ and the ‘energy performance gap’  

Science Journals Connector (OSTI)

Abstract Concern has recently intensified regarding increases in the consumption of energy services that often follow energy efficiency improvements, a phenomenon widely called the ‘rebound effect’. However, while some economists have precisely defined this as a metric, much discussion in academic and policy literature is imprecise, leading to confusion and miscommunication. This is especially so regarding direct ‘rebound effects’ in thermal retrofits of existing homes. This study surveys common usages of the term ‘rebound effect’ in domestic heating, identifying three main metrics, which employ different mathematical forms and therefore give different results, but are often lumped together. It defines these as the ‘classic’ rebound effect; the ‘energy savings deficit’, and the ‘energy performance gap’. It then applies these to an empirical case study of three recently retrofitted 30-apartment buildings in Germany. It finds that each metric gives different results for identical situations, ranging from 2.0% to 29.9% for one building, 15.7% to 56.8% for the second, and 43.7% to 272.9% for the third. This may be one reason so-called ‘rebound effect’ results from various studies are so disparate. Nevertheless, specific uses are identified for each of the three metrics, provided their precise definitions are made clear.

Ray Galvin

2014-01-01T23:59:59.000Z

391

Welcome to the Efficient Windows Collaborative  

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Weatherization Assistance Weatherization Assistance The Weatherization Assistance Program (WAP) offers assistance to eligible families suffering from high energy bills due to drafty windows, uninsulated and leaky attics or other inefficiencies. Although WAP is a federal government program, the eligibility criteria differ by state and the weatherization services themselves are performed by local agencies. Who is eligible? Eligibility for weatherization services depends on income. If you receive Supplemental Security Income or Aid to Families with Dependent Children, you are automatically eligible. In other cases, states give preference to: People over 60 years of age Families with one or more members with a disability Families with children (in most states). For more information on eligibility, check out the Weatherization

392

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Operator Types-Skylights Operator Types-Skylights Choosing Skylights for Your Home Check the pitch roof and determine what skylight product would work best (deck-mounted, curb-mounted, pan-flashed). Determine what type of skylight operation is wanted (electric venting, manual venting, fixed). Identify the ceiling and roof style for optimal size and configuration of the skylight shaft (flat ceiling, cathedral ceiling, sloped wall, flat or sloped roof) Select the glazing type (high-performance, tempered, laminated, impact, snow load). Select screen accessories if wanted (solar blinds, blackout blinds, Venetian blinds, roller shades). Select manual or electric controls to operate operable skylights and accessories. Roof windows have become increasingly popular as homeowners and designers

393

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

For more information about the National Green Building Standard, see For more information about the National Green Building Standard, see information from the NAHB Research Center www.nahbrc.com exit disclaimer . The National Green Building Standard Certification exit disclaimer provides third-party proof for product performance claims. The Green Scoring Tool exit disclaimer allows the scoring of a project to the Standard and includes support materials such as how to verify, intent, how to implement, resources, and green approved products. National Green Building Standard(tm) The National Green Building Standard provides recognition for sustainable and energy-saving building practices, including the use of energy-efficient windows, in all types of residential construction. This standard has been developed for by a consensus committee assembled by the National

394

Design of an Aluminum Proton Beam Window for the Spallation Neutron Source  

SciTech Connect

An aluminum proton beam window design is being considered at the Spallation Neutron Source primarily to increase the lifetime of the window, with secondary advantages of higher beam transport efficiency and lower activation. The window separates the core vessel, the location of the mercury target, from the vacuum of the accelerator, while withstanding the pass through of a proton beam of up to 2 MW with 1.0 GeV proton energy. The current aluminum alloy being investigated for the window material is 6061-T651 due to its combination of high strength, high thermal conductivity, and good resistance to aqueous corrosion, as well as demonstrated dependability in previous high-radiation environments. The window design will feature a thin plate with closely spaced cross drilled cooling holes. An analytical approach was used to optimize the dimensions of the window before finite element analysis was used to simulate temperature profiles and stress fields resulting from thermal and static pressure loading. The resulting maximum temperature of 60 C and Von Mises stress of 71 MPa are very low compared to allowables for Al 6061-T651. A significant challenge in designing an aluminum proton beam window for SNS is integrating the window with the current 316L SS shield blocks. Explosion bonding was chosen as a joining technique because of the large bonding area required. A test program has commenced to prove explosion bonding can produce a robust vacuum joint. Pending successful explosion bond testing, the aluminum proton beam window design will be proven acceptable for service in the Spallation Neutron Source.

Janney, Jim G [ORNL; McClintock, David A [ORNL

2012-01-01T23:59:59.000Z

395

Study of the shape of an optical window in a super-resolution state by electromagnetic-thermal coupled simulation: Effects of melting of an active layer in an optical disc  

SciTech Connect

We performed a multi-physics simulation for the propagation of electromagnetic waves and heat conduction in a super-resolution optical disc that includes an active layer of InSb. Because the change in the optical constant of InSb due to the phase transition is taken into account, the melting of the active layer can be realistically simulated in our calculation. It was found that in the case of an incident light power (P) of 2 mW, a profile of the electric field intensity transmitted through the InSb layer has an asymmetric shape with a narrow peak. This beam-narrowing was suggested to be an essential mechanism of the super-resolution, because a narrower light beam allows the detection of a smaller pit structure than the optical diffraction limit. This beam-narrowing was found to be originating from a small molten region produced in the InSb layer, which works as a mask for light exposure.

Sano, Haruyuki, E-mail: h-sano@ishikawa-nct.ac.jp [Ishikawa National College of Technology, Kitacyujo, Tsubata, Ishikawa 929-0392 (Japan); Shima, Takayuki; Kuwahara, Masashi [National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565 (Japan); Fujita, Yoshiya; Uchiyama, Munehisa; Aono, Yoshiyuki [Pulstec Industrial Co., Ltd., 7000-35, Nakagawa, Hosoe-cho, Kita-ku, Hamamatsu 431-1304 (Japan)

2014-04-21T23:59:59.000Z

396

Empirical assessment of a prismatic daylight-redirecting window film in a  

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Empirical assessment of a prismatic daylight-redirecting window film in a Empirical assessment of a prismatic daylight-redirecting window film in a full-scale office testbed Title Empirical assessment of a prismatic daylight-redirecting window film in a full-scale office testbed Publication Type Conference Paper LBNL Report Number LBNL-6496E Year of Publication 2013 Authors Thanachareonkit, Anothai, Eleanor S. Lee, and Andrew McNeil Conference Name Illuminating Engineering Society (IES) Annual Conference 2013 Date Published 10/2013 Conference Location Huntington Beach, California Keywords building energy efficiency., daylighting, microstructure film, prismatic film, windows Abstract Daylight redirecting systems with vertical windows have the potential to offset lighting energy use in deep perimeter zones. Microstructured prismatic window films can be manufactured using low-cost, roll-to-roll fabrication methods and adhered to the inside surface of existing windows as a retrofit measure or installed as a replacement insulating glass unit in the clerestory portion of the window wall. A clear film patterned with linear, 50-250 micrometer high, four-sided asymmetrical prisms was fabricated and installed in the south-facing, clerestory low-e, clear glazed windows of a full-scale testbed facility. Views through the film were distorted. The film was evaluated in a sunny climate over a two-year period to gauge daylighting and visual comfort performance. The daylighting aperture was small (window-to-wall ratio of 0.18) and the lower windows were blocked off to isolate the evaluation to the window film. Workplane illuminance measurements were made in the 4.6 m (15 ft) deep room furnished as a private office. Analysis of discomfort glare was conducted using high dynamic range imaging coupled with the evalglare software tool, which computes the daylight glare= probability and other metrics used to evaluate visual discomfort.

397

LBNL Window & Daylighting Software -- CGDB  

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Overview Overview The LBNL WINDOW and THERM simulation programs (versions 6 and higher) have the capability to model "complex glazing systems" which include woven shades, venetian blinds, fritted glass, and other systems that can be characterized by BSDF (Bi-Directional Scattering Distribution Function) files. To support the modeling of these complex systems, it is necessary to characterize the optical and thermal properties of the materials and the systems being modeled. The Complex Glazing Database (CGDB) contains the data needed to model various manufacturers' systems. LBNL is still developing the measuring and submittal procedures so that manufacturers can submit measured data for review and inclusion in future CGDB releases. When these procedures are complete, it is hoped that manufacturers will measure and submit data for their products to LBNL for inclusion in the CGDB. In a similar process to the IGDB (International Glazing Database) it is envisioned that the CGDB will be released multiple times per year as new materials and systems are measured and added to the database.

398

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Guidance on Window Durability Guidance on Window Durability There is no simple rating or absolute guarantee of the durability of a window. You may want to study the design and workmanship of the window and rely on recommendations from others who have used similar products. The advice of experienced architects and builders can be helpful. As with other products, warranties can be an indicator of the reliability of the window and its manufacturer. Durability may vary with location; for example, some materials are degraded by salt near the ocean. These aspects of window durability deserve special attention: frame and sashes; insulating glass seals; weatherstripping; and local requirements for structural integrity. Frame and Sashes Although design and workmanship may be the most important factors

399

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Fresh Air Fresh Air Windows provide the primary means to control air flow in most homes. People open windows to provide fresh air, ventilate odors and smoke, dissipate heat and moisture, and create air movement on hot days. While exhaust fans and central air systems can mechanically ventilate a room, opening a room to the outdoors is perceived as more direct and natural. Guidelines for Providing Fresh Air Place operable windows in all rooms to give occupants opportunity for fresh air. Provide cross-ventilation by placing window openings on opposite walls in line with the prevailing winds. Use casement windows to direct and control ventilation. Use operable skylights or roof windows to enhance ventilation. Use landscape elements to direct breezes. In order to ensure that all residences have access to the healthful aspects

400

High Thermal Conductivity UO2-BeO Nulcear Fuel: Neutronic Performance Assessments and Overview of Fabrication  

E-Print Network (OSTI)

for the continuous (a) and dispersed (b) types [16]. 2.3 Silicon Carbide as a High Conductivity Additive Solomon et al. explored the feasibility of increasing the thermal conductivity of oxide fuels by the addition of a second, higher thermal conductivity solid... methodology used to restrict the CO or SiO gases. All processing, therefore, must take place below this temperature. Because of ! "# Table 2.3. Samples used in the thermal conductivity measurements $%&'()&*! $(+!%,-.&/! 0...

Naramore, Michael J

2010-08-03T23:59:59.000Z

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

List of Windows Incentives | Open Energy Information  

Open Energy Info (EERE)

Windows Incentives Windows Incentives Jump to: navigation, search The following contains the list of 604 Windows Incentives. CSV (rows 1-500) CSV (rows 501-604) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP (Central and North) - CitySmart Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Schools Boilers Central Air conditioners Chillers Comprehensive Measures/Whole Building Custom/Others pending approval Energy Mgmt. Systems/Building Controls Furnaces Heat pumps Lighting Lighting Controls/Sensors Motor VFDs Motors Roofs Windows Yes AEP (Central, North and SWEPCO) - Commercial Solutions Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Nonprofit Schools

402

Performance evaluation of polymer/clay nanocomposite thermal protection systems based on polyethylene glycol phase change material  

Science Journals Connector (OSTI)

Phase change materials (PCMs) are substances with a high ... can be utilized in designing the heat protective materials as well as in the thermal energy...

Ahmad Reza Bahramian; Leila Sadat Ahmadi; Mehrdad Kokabi

2014-03-01T23:59:59.000Z

403

Heat dissipation performance of a high-brightness LED package assembly using high-thermal conductivity filler  

Science Journals Connector (OSTI)

This paper presents a thermal analysis and experimental validation of natural convective heat transfer of a high-brightness light-emitting diode (LED) package assembly. The substrate...

Yung, K C; Liem, H; Choy, H S

2013-01-01T23:59:59.000Z

404

The Impact of Above-Sheathing Ventilation on the Thermal and Moisture Performance of Steep-Slope Residential Roofs and Attics  

E-Print Network (OSTI)

France of the Building Technologies Program. The IrBCP project team members are Andre? Desjarlais, William Miller, Tom Petrie, Jan Kosny and Achilles Karagiozis, all of ORNL’s Buildings Envelope Program. The Metal Construction Association and its affiliate members.... Beal, D., and S. Chandra. 1995. “The Measured Summer Performance of Tile Roof Systems and Attic Ventilation Strategies in Hot Humid Climates.” In Proceedings of the Thermal Performance of the Exterior Envelopes of Buildings VI. U.S. DOE/ORNL...

Miller, W.; Karagiozis, A.; Wilson, J.

2006-01-01T23:59:59.000Z

405

BT::Electrochromic Windows Resources  

NLE Websites -- All DOE Office Websites (Extended Search)

spacer spacer spacer spacer Resources spacer Industry Contacts | CA Utility Contacts | R&D Organizations | Technical Reports | References | Acknowledgements | Project Team spacer Industry Contacts As of 2006, SAGE Electrochromics, Inc. is the only manufacturer in the U.S. selling electrochromic-coated glass units for building applications: Lou Podbelski SAGE Electrochromics, Inc. One Sage Way Faribault, MN 55021 (507) 331-4935 http://www.sage-ec.com/ SAGE's first market entry was to provide electrochromic coated glass to Velux for their switchable electrochromic skylight product line: electric venting skylights, fixed skylights, and fixed curb-mounted skylights in various rectangular sizes. They now market to a variety of window and curtain wall suppliers; contact SAGE for current supplier information.

406

Laser sealed vacuum insulating window  

DOE Patents (OSTI)

A laser sealed evacuated window panel is comprised of two glass panes held spaced apart in relation to each other by a plurality of spherical glass beads and glass welded around the edges to provide an evacuated space between the glass panes that is completely glass sealed from the exterior. The glass welded edge seal is obtained by welding the edges of the glass panes together with a laser beam while the glass panes and bead spacers are positioned in a vacuum furnace and heated to the annealing point of the glass to avoid stress fracture in the area of the glass weld. The laser welding in the furnace can be directed around the perimeter of the galss panel by a combination of rotating the glass panel and linearly translating or aiming the laser with a relay mirror.

Benson, D.K.; Tracy, C.E.

1985-08-19T23:59:59.000Z

407

Laser sealed vacuum insulation window  

DOE Patents (OSTI)

A laser sealed evacuated window panel is comprised of two glass panes held spaced apart in relation to each other by a plurality of spherical glass beads and glass welded around the edges to provide an evacuated space between the glass panes that is completely glass sealed from the exterior. The glass welded edge seal is obtained by welding the edges of the glass panes together with a laser beam while the glass panes and bead spacers are positioned in a vacuum furnace and heated to the annealing point of the glass to avoid stress fracture in the area of the glass weld. The laser welding in the furnace can be directed around the perimeter of the glass panel by a combination of rotating the glass panel and linearly translating or aiming the laser with a relay mirror.

Benson, David K. (Golden, CO); Tracy, C. Edwin (Golden, CO)

1987-01-01T23:59:59.000Z

408

Windows Registry Forensics: Advanced Digital Forensic Analysis of the Windows Registry  

Science Journals Connector (OSTI)

Harlan Carvey brings readers an advanced book on Windows Registry. The first book of its kind EVER -- Windows Registry Forensics provides the background of the Registry to help develop an understanding of the binary structure of Registry hive files. ...

Harlan Carvey

2011-02-01T23:59:59.000Z

409

Krypton for Multi-Pane Windows: Selective Absorption of Krypton from Oxygen  

NLE Websites -- All DOE Office Websites (Extended Search)

Krypton for Multi-Pane Windows: Selective Absorption of Krypton from Oxygen Krypton for Multi-Pane Windows: Selective Absorption of Krypton from Oxygen in an Ionic Liquid Speaker(s): John Prausnitz Waheed Afzal Date: September 18, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Robert Hart Because of its low thermal conductivity, krypton is a useful gas for the vapor space of double- (or triple-) pane windows. However krypton is more expensive than argon, currently used for most of multi-pane windows. The high price of krypton is due to the energy-intensive cryogenic process for its recovery from oxygen that is obtained from air. Ionic liquids may provide a cost-effective absorption process for separation of krypton from the oxygen stream of a liquid-air plant. The polarizability of krypton is higher than that of oxygen; therefore, krypton solubility may be

410

Thermal performance evaluation of SiC power devices packaging A.GRACIA, S.AZZOPARDI, E.WOIRGARD  

E-Print Network (OSTI)

impedance and the thermal resistance and also finite elements simulations. The correlation between methods. 2 High temperature device packaging concepts The selection of materials for a high temperature package (figure 1) is based on a combination of material properties: conductivity, Coefficient of Thermal

Boyer, Edmond

411

Evaluation of Low-E Storm Windows in the PNNL Lab Homes  

SciTech Connect

This study examines the performance of exterior and interior low-e storm panels with a controlled whole home experimental design using PNNL's Lab Homes. Summing the estimated annual average heating and cooling savings, the installation of low-e storm panels resulted in approximately 10% annual energy savings. The results of the experiment will be used to determine and validate performance of low-e storm windows over double pane clear glass windows in a whole home setting.

Knox, Jake R.; Widder, Sarah H.

2014-05-31T23:59:59.000Z

412

Building America Top Innovations 2013 Profile Â… Window Replacement, Rehabilitation, & Repair Guide  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

are also discussed. are also discussed. Water infiltration is dealt with at considerable length because windows are one of the likeliest components in the building structure for water entry and because water intrusion and resultant damage may have gone on unnoticed for some time as water can enter the wall cavity through and around the window assembly. Suggestions for investigating sources of water intrusion are provided. The condition of the decorative trim around the window can be an indication of water damage but deterioration of the trim is typically an aesthetic problem not a performance problem. However, if the window sill is damaged, it should be replaced because it is the means by which water will drain out away from the house or, incorrectly, into the wall. Damaged or deteriorating window sashes, frames, or casings

413

This guide is designed to help select windows, doors and skylights that will mee  

NLE Websites -- All DOE Office Websites (Extended Search)

Hawaii. The Hawaii. The requirements in the 2009 IECC are the same for windows used in new buildings, remodeling & additions to existing buildings, and as replacements of existing windows. Step-by-Step Instructions 1. Use the "IECC Prescriptive Window Energy Efficiency Requirements" (on the back of this sheet) to determine the window performance requirements associated with the climate zone. 2. Construct the home with windows that have area weighted average U-factor and SHGC values less than or equal to the values for the climate zone and meet the code maximum air leakage requirements. The 2009 International Energy Conservation Code The 2009 IECC was developed by the International Code Council (ICC) and is currently available to states for adoption. The IECC is the national model standard for energy-efficient

414

Measured Performance of Selective Glazings  

NLE Websites -- All DOE Office Websites (Extended Search)

Measured Performance of Selective Glazings Measured Performance of Selective Glazings Title Measured Performance of Selective Glazings Publication Type Conference Paper LBNL Report Number LBL-37747 Year of Publication 1995 Authors Klems, Joseph H., Mehry Yazdanian, and Guy O. Kelley Conference Name Thermal Performance of the Exterior Envelopes of Buildings VI Conference Date Published 12/1995 Conference Location Clearwater Beach, FL Call Number LBL-37747 Abstract Measurements of the net heat flow through four selective glazings in comparison with clear double glazing under late summer outdoor conditions are presented. The solar heat gain coefficient (SHGC) for each glazing is extracted from the data and shown to be angle-dependent. Good agreement is found between measured properties and calculations with WINDOW 4.1.

415

Windows Mobile LiveSD Forensics  

Science Journals Connector (OSTI)

More and more often, smartphones are relevant targets of civil and criminal investigations. Currently, there are several tools available to acquire forensic evidence from smartphones. Unfortunately, most of these tools require to connect the smartphone ... Keywords: Data acquisition, Mobile device forensics, PocketPC forensics, Window CE forensics, Windows Mobile Forensics

EyüP S. Canlar; Mauro Conti; Bruno Crispo; Roberto Di Pietro

2013-03-01T23:59:59.000Z

416

Dynamically Responsive Infrared Window Coatings  

Energy.gov (U.S. Department of Energy (DOE))

Lead Performer: Pacific Northwest National Laboratory - Richland, WA Partners: PPG Industries - Pittsburgh, PA

417

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Exterior Shading Exterior Shading Window Attachments For detailed information on storm windows and other window attachments, visit www.windowattachments.org exit disclaimer , a site supported by Lawrence Berkeley National Laboratory, Building Green, and the U.S. Department of Energy. DOE's Energy Savers You can improve the energy efficiency of existing windows by various additions to an existing window. Awnings exit disclaimer Blinds exit disclaimer Draperies exit disclaimer Overhangs exit disclaimer Shades exit disclaimer Shutters exit disclaimer Awnings in Residential Buildings Study showing that awnings have advantages that contribute to more sustainable buildings. Download Awnings in Residential Buildings exit disclaimer The most effective way of reducing solar heat gain is to block the sun's

418

LBNL Window & Daylighting Software -- COMFEN  

NLE Websites -- All DOE Office Websites (Extended Search)

5 Beta 5 Beta (5.0.05 -- January 1, 2013) Last Updated: 01/01/2013 Screen Shots Opening Screen, Overview Tab Climate Tab Facade Edit Screen The Facade Library screen allows the user to define a facade with windows, and overhangs and fins for each window. COMFEN displays the geometry of each window that is defined as well as the position in the facade. Each window can be defined with a different glazing system and frame combination if desired. Multiple facades can be defined on this screen, and then compared in the Project screen, described below. Glazed Wall Assembly Definition Glazing System Library The Glazing System Library allows the user to make new glazing systems or import them from a WINDOW 6 database. Shading Control Scheme Library The Shading Control Scheme Library screen allows the user to define interior, exterior and between glass shading systems for

419

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Benefits: Energy & Cost Savings Benefits: Energy & Cost Savings The following information is an example of energy and cost savings for Boston and Phoenix. See the sidebar to the right for information on energy use for generic window products in your city or region. Heating Season Savings U-Factor In climates with a significant heating season, non-energy efficient windows can represent a major source of unwanted heat loss, discomfort, and condensation problems. In recent decades, windows have undergone a technological revolution. It is now possible to have lower heat loss, less air leakage, and warmer window surfaces that improve comfort and minimize condensation. The graphs below illustrate the simulated savings in heating season costs associated with energy efficient windows for a typical

420

X-Windows Acceleration via NX  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Windows Acceleration via NX X-Windows Acceleration via NX X-Windows Acceleration via NX May 12, 2011 by Francesca Verdier NX is a computer program that handles remote X-Windows connections. It can greatly improve the speed of X-Windows applications running at NERSC. See Using NX. User Announcements Email announcement archive Subscribe via RSS Subscribe Browse by Date January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 August 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 April 2011 March 2011 February 2011 January 2011 September 2010 Last edited: 2013-04-02 15:13:27

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

LBNL Window & Daylighting Software -- COMFEN  

NLE Websites -- All DOE Office Websites (Extended Search)

1 1 Last Updated: 10/04/2012 Screen Shots Opening Screen, Overview Tab Climate Tab Facade Edit Screen The Facade Library screen allows the user to define a facade with windows, and overhangs and fins for each window. COMFEN displays the geometry of each window that is defined as well as the position in the facade. Each window can be defined with a different glazing system and frame combination if desired. Multiple facades can be defined on this screen, and then compared in the Project screen, described below. Glazed Wall Assembly Definition Glazing System Library The Glazing System Library allows the user to make new glazing systems or import them from a WINDOW 6 database. Shading Control Scheme Library The Shading Control Scheme Library screen allows the user to define interior, exterior and between glass shading systems for

422

Window Industry Technology Roadmap | Open Energy Information  

Open Energy Info (EERE)

Industry Technology Roadmap Industry Technology Roadmap Jump to: navigation, search Logo: Window Industry Technology Roadmap Name Window Industry Technology Roadmap Agency/Company /Organization United States Department of Energy Sector Energy Focus Area Energy Efficiency, Buildings Topics Technology characterizations Resource Type Guide/manual Website http://www.nrel.gov/docs/fy01o References Window Industry Technology Roadmap[1] Abstract The Window Industry Technology Roadmap is designed to provide clear guidance to both the government and the private sector in planning future investments and initiatives. Overview "The Window Industry Technology Roadmap is designed to provide clear guidance to both the government and the private sector in planning future investments and initiatives. It serves as a resource for government to

423

Building Technologies Office: Windows, Skylights, and Doors Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Windows, Skylights, and Windows, Skylights, and Doors Research to someone by E-mail Share Building Technologies Office: Windows, Skylights, and Doors Research on Facebook Tweet about Building Technologies Office: Windows, Skylights, and Doors Research on Twitter Bookmark Building Technologies Office: Windows, Skylights, and Doors Research on Google Bookmark Building Technologies Office: Windows, Skylights, and Doors Research on Delicious Rank Building Technologies Office: Windows, Skylights, and Doors Research on Digg Find More places to share Building Technologies Office: Windows, Skylights, and Doors Research on AddThis.com... About Take Action to Save Energy Partner with DOE Activities Appliances Research Building Envelope Research Windows, Skylights, & Doors Research Space Heating & Cooling Research

424

Design and Construction of a Guarded Hot Box Facility for Evaluating the Thermal Performance of Building Wall Materials  

E-Print Network (OSTI)

, studs in walls are also thermal bridges, since the thermal resistance of wood is much less than the insulation surrounding them. [5] In order to block thermal bridging, either exterior insulation or Aerogel stud strips can be used. [4]. Most exterior... components. [6] 3 3 Aerogel is a silica based nano-scale structure originally developed by NASA and used on the Mars Rover that is 98% air [7], [8]. Until recently aerogel has been far too expensive to even consider using in homes, however...

Mero, Claire Renee

2012-07-16T23:59:59.000Z

425

Project Profile: Development and Performance Evaluation of High Temperature Concrete for Thermal Energy Storage for Solar Power Generation  

Energy.gov (U.S. Department of Energy (DOE))

The University of Arkansas, under the Thermal Storage FOA, is developing a novel concrete material that can withstand operating temperatures of 500°C or more and is measuring the concrete properties.

426

Performances of a thermal-storage module in a solar-energy power production perspective: A numerical assessment  

Science Journals Connector (OSTI)

A theoretical model has been developed to describe the cyclic behaviour of a latent-heat thermal-storage module. Attention has been focused on power production applications, where stability of the heat supply ...

C. Bellecci; M. Conti

427

Effects of thermocline on performance of underwater glider’s power system propelled by ocean thermal energy  

Science Journals Connector (OSTI)

The thermal glider’s changeable volume produces propelling force to power the glider’s descending and ascending through ... affect the working processes of the glider’s power system. Based on the enthalpy method,...

Hai Yang; Jie Ma

2009-12-01T23:59:59.000Z

428

Evaluation of the Thermal Performance for a Wire Mesh/Hollow Glass Microsphere Composite Structure as a Conduction Barrier  

E-Print Network (OSTI)

An experimental investigation exploring the use of wire mesh/hollow glass microsphere combination for use as thermal insulation was conducted with the aim to conclude whether or not it represents a superior insulation technology to those...

Mckenna, Sean

2010-01-15T23:59:59.000Z

429

Lighting energy savings potential of split-pane electrochromic windows  

NLE Websites -- All DOE Office Websites (Extended Search)

Lighting energy savings potential of split-pane electrochromic windows Lighting energy savings potential of split-pane electrochromic windows controlled for daylighting with visual comfort Title Lighting energy savings potential of split-pane electrochromic windows controlled for daylighting with visual comfort Publication Type Journal Article LBNL Report Number LBNL-6152E Year of Publication 2013 Authors Fernandes, Luis L., Eleanor S. Lee, and Gregory J. Ward Journal Energy and Buildings Volume 61 Pagination 8-20 Abstract A simulation study was conducted to evaluate lighting energy savings of split-pane electrochromic (EC) windows controlled to satisfy key visual comfort parameters. Using the Radiance lighting simulation software, interior illuminance and luminance levels were computed for a south-facing private office illuminated by a window split into two independently-controlled EC panes. The transmittance of these was optimized hourly for a workplane illuminance target while meeting visual comfort constraints, using a least-squares algorithm with linear inequality constraints. Blinds were successively deployed until visual comfort criteria were satisfied. The energy performance of electrochromics proved to be highly dependent on how blinds were controlled. With hourly blind position adjustments, electrochromics showed significantly higher (62% and 53%, respectively without and with overhang)lighting energy consumption than clear glass. With a control algorithm designed to better approximate realistic manual control by an occupant, electrochromics achieved significant savings (48% and 37%, respectively without and with overhang). In all cases, energy consumption decreased when the workplace illuminance target was increased. In addition, the fraction of time during which the occupant had an unobstructed view of the outside was significantly greater with electrochromics: 10 months out of the year versus a handful of days for the reference case.

430

Window Manufacturer Sees Business Surge As Weatherization Supplier...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

of the aluminum windows they're replacing - the U-value is the measure of the rate of heat loss or gain through a window. The lower the U-value, the better a window's...

431

Thermal hydraulic performance testing of printed circuit heat exchangers in a high-temperature helium test facility  

SciTech Connect

In high-temperature gas-cooled reactors, such as a very high temperature reactor (VHTR), an intermediate heat exchanger (IHX) is required to efficiently transfer the core thermal output to a secondary fluid for electricity generation with an indirect power cycle and/or process heat applications. Currently, there is no proven high-temperature (750–800 °C or higher) compact heat exchanger technology for high-temperature reactor design concepts. In this study, printed circuit heat exchanger (PCHE), a potential IHX concept for high-temperature applications, has been investigated for their heat transfer and pressure drop characteristics under high operating temperatures and pressures. Two PCHEs, each having 10 hot and 10 cold plates with 12 channels (semicircular cross-section) in each plate are fabricated using Alloy 617 plates and tested for their performance in a high-temperature helium test facility (HTHF). The PCHE inlet temperature and pressure were varied from 85 to 390 °C/1.0–2.7 MPa for the cold side and 208–790 °C/1.0–2.7 MPa for the hot side, respectively, while the mass flow rate of helium was varied from 15 to 49 kg/h. This range of mass flow rates corresponds to PCHE channel Reynolds numbers of 950 to 4100 for the cold side and 900 to 3900 for the hot side (corresponding to the laminar and laminar-to-turbulent transition flow regimes). The obtained experimental data have been analyzed for the pressure drop and heat transfer characteristics of the heat transfer surface of the PCHEs and compared with the available models and correlations in the literature. In addition, a numerical treatment of hydrodynamically developing and hydrodynamically fully-developed laminar flow through a semicircular duct is presented. Relations developed for determining the hydrodynamic entrance length in a semicircular duct and the friction factor (or pressure drop) in the hydrodynamic entry length region for laminar flow through a semicircular duct are given. Various hydrodynamic entrance region parameters, such as incremental pressure drop number, apparent Fanning friction factor, and hydrodynamic entrance length in a semicircular duct have been numerically estimated.

Sai K. Mylavarapu; Xiaodong Sun; Richard E. Glosup; Richard N. Christensen; Michael W. Patterson

2014-04-01T23:59:59.000Z

432

Dynamics of window glass fracture in explosions  

SciTech Connect

An exploratory study was conducted under the Architectural Surety Program to examine the possibility of modifying fracture of glass in the shock-wave environment associated with terrorist bombings. The intent was to explore strategies to reduce the number and severity of injuries resulting from those attacks. The study consisted of a series of three experiments at the Energetic Materials Research and Testing Center (EMRTC) of the New Mexico Institute of Mining and Technology at Socorro, NM, in which annealed and tempered glass sheets were exposed to blast waves at several different levels of overpressure and specific impulse. A preliminary assessment of the response of tempered glass to the blast environment suggested that inducing early failure would result in lowering fragment velocity as well as reducing the loading from the window to the structure. To test that possibility, two different and novel procedures (indentation flaws and spot annealing) were used to reduce the failure strength of the tempered glass while maintaining its ability to fracture into small cube-shaped fragments. Each experiment involved a comparison of the performance of four sheets of glass with different treatments.

Beauchamp, E.K.; Matalucci, R.V.

1998-05-01T23:59:59.000Z

433

Building America Top Innovations 2013 Profile Â… High-Efficiency Window Air Conditioners  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

inexpensive, portable, and can be installed by inexpensive, portable, and can be installed by home occupants, making them a good solution for supplemental cooling, for installing air conditioning in homes that lack ductwork, and for renters. As a result, 7.5 million window air conditioners are purchased each year in the United States-more than all other home cooling equipment combined. However, a window air conditioner is required to meet only modest minimum efficiency standards, and its typical installation in a window causes air leakage, which significantly reduces the equipment's performance. To measure the impact these products have on home energy use, researchers at the National Renewable Energy Laboratory (NREL) studied the performance of one 10-year-old and three new window air conditioners in a range of

434

Adjoint and forward Monte Carlo coupled weight window generator for variance reduction  

SciTech Connect

Among the various variance-reduction methods in Monte Carlo calculations, one of the most widely used techniques is the weight window method. The MCNP code provides a weight window generator (WWG) option. In WWG of MCNP, the importance of a cell is estimated by the virtual sampling method during normal Monte Carlo calculation. But, the performance of WWG tends to deteriorate in deep penetration problems. To enhance the performance of the weight window method, importance estimation by the deterministic adjoint calculation has been proposed. However, this approach is possible only when the related deterministic code and interface program are available. The midway coupling method is a surface tally technique that calculates detector response based on the reciprocity theorem, but it does not provide an importance generator. In this paper, a new weight window generation method, called adjoint and forward Monte Carlo coupled WWG, is proposed to overcome the drawbacks of the current WWG in MCNP and the deterministic adjoint calculation method.

Ahn, J.G.; Cho, N.Z.

2000-07-01T23:59:59.000Z

435

Thermal performance of a scramjet combustor operating at Mach 5.6 flight conditions. Final report, May 1996--May 1997  

SciTech Connect

This report describes the experimental data and the procedures used in acquiring and reducing the thermal loads data during tests of a hydrocarbon-fueled scramjet combustor at United Technologies Research Center (UTRC). This research effort is part of the UTRC effort to develop dual-mode scramjet combustor technology to support the development of Mach S missile technology. The objective of the thermal loads testing was to map the thermal and mechanical loads, including heat transfer, dynamic and static pressures, and skin friction in a scramjet combustor during direct-connect scramjet tests. The tests were conducted at the UTRC Ramject/Scramjet direct-connect combustor test facility in East Hartford, CT.

Stouffer, S.D.; Neumann, R.D.; Emmer, D.S.

1997-10-01T23:59:59.000Z

436

Low-Cost Solutions for Dynamic Window Material | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Low-Cost Solutions for Dynamic Window Material Low-Cost Solutions for Dynamic Window Material Emerging Technologies Project for the 2013 Building Technologies Office's Program Peer...

437

Assessment of Energy Impact of Window Technologies for Commercial Buildings  

E-Print Network (OSTI)

1.2 quads. Future window technologies offer energy savingsImpact of Window Technologies for Commercial BuildingsEnvironmental Energy Technologies Division October 2009 This

Hong, Tianzhen

2014-01-01T23:59:59.000Z

438

Highly Insulating Residential Windows Using Smart Automated Shading...  

Office of Environmental Management (EM)

Smart Window with integrated sensors, control logic and a motorized shade between glass panes. Image: Lawrence Berkeley National Laboratory 2 of 3 Residential Smart Window...

439

Building Technologies Office: Energy-Efficient Window Air Conditioner  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy-Efficient Window Energy-Efficient Window Air Conditioner Ratings Research Project to someone by E-mail Share Building Technologies Office: Energy-Efficient Window Air Conditioner Ratings Research Project on Facebook Tweet about Building Technologies Office: Energy-Efficient Window Air Conditioner Ratings Research Project on Twitter Bookmark Building Technologies Office: Energy-Efficient Window Air Conditioner Ratings Research Project on Google Bookmark Building Technologies Office: Energy-Efficient Window Air Conditioner Ratings Research Project on Delicious Rank Building Technologies Office: Energy-Efficient Window Air Conditioner Ratings Research Project on Digg Find More places to share Building Technologies Office: Energy-Efficient Window Air Conditioner Ratings Research Project on

440

LBNL Windows & Daylighting Software -- THERM: Future Work  

NLE Websites -- All DOE Office Websites (Extended Search)

FUTURE WORK FUTURE WORK As window products are designed and manufactured to become increasingly more energy efficient, it is imperative that the software tools such as THERM, which are used to design and rate such products for U-values and Condensation Resistance, are increasingly accurate in order to capture the true benefits of high-performance products. THERM's user interface and algorithms were therefore designed to accommodate the results of ongoing research on fenestration product heat transfer. These topics include: Providing a library of local film coefficients to better model frame and edge heat transfer and projecting products such as skylights and greenhouse windows. Incorporating the effects of 3D heat transfer paths into THERM. Developing a convection model for small cavities (in extruded frames) and in large cavities (domed skylights).

Note: This page contains sample records for the topic "window thermal performance" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

What is the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

What is the Efficient Windows Collaborative? What is the Efficient Windows Collaborative? The EWC is a coalition of window, door, skylight, and component manufacturers, research organizations, federal, state and local government agencies, and others interested in expanding the market for high-efficiency fenestration products. Its goals are to double the current market penetration of efficient window technologies, and to make NFRC labeling a near-universal practice in U.S. markets. The Alliance to Save Energy has the lead coordination and management role. Using its active involvement with the energy efficiency industry and its experience in promoting energy efficient products, the Alliance is committed to working with the fenestration industry to make the Collaborative an effective force in the marketplace.

442

Introduction to Windows Phone Application Development  

Science Journals Connector (OSTI)

This chapter introduces Windows Phone, including its device hardware characteristics and software development tools. After this introduction, you will learn how to create simple applications and how to deploy ...

Fabio Claudio Ferracchiati; Emanuele Garofalo

2011-01-01T23:59:59.000Z

443

NREL Electrochromic Window Research Wins Award  

ScienceCinema (OSTI)

Winners of the CO-LABS Governor's Award for High-Impact Research in Energy Efficiency, Dr. Satyen Deb at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) discovered that a small electrical charge can change the opacity of tungsten oxide from clear to tinted. He, Dr. Dane Gillaspie, and their fellow scientists at NREL then applied this knowledge to develop and transfer the technologies required to construct an electrochromic window, which can switch between clear and heavily tinted states. Electrochromic windows allow natural light in while adding tint to reduce summer heat and glare, and going clear to allow sunlight through in the winter. Broad adaptation of these windows could reduce US total energy use by four percent and reduce building cooling loads by 20%, much of this during expensive peak hours. Windows based on these discoveries are now being installed worldwide.

None

2013-05-29T23:59:59.000Z

444

Occupant Response to Window Control Signaling Systems  

E-Print Network (OSTI)

my window it will waste energy.  Even so I open the windowthe windown wouldn’t waste energy. ” MS Thesis, Dept. ofthe potential for energy waste and balancing issues.  

Ackerly, Katherine

2012-01-01T23:59:59.000Z

445

Windows Public Tools | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Windows Public Tools Windows Public Tools Windows Public Tools Windows TOOL DESCRIPTION KarlBridge The KarlBridge package by Doug Karl. A program that runs on a PC with two Ethernet boards, turning the PC into a sophisticated, high-level, packet-filtering bridge. It can filter packets based on any specified protocol, including IP, XNS, DECNET, LAT, IPX, AppleTalk, etc. FakeDOS FakeDoS is a PC password system that, when executed from the AUTOEXEC.BAT file, will present the user with an apparently normal DOS prompt on bootup. However, the system is actually waiting for the correct password to be typed in. LOCK'M-UP The LogTime program logs the current time into a file, maintaining the last 170 entries stored. This can be useful when placed in AUTOEXEC.BAT as a method of tracking the use of a computer.

446

W-1 SLSF post-test data analysis. Part 1. Thermal hydraulic analysis. [LMFBR  

SciTech Connect

Four types of tests were performed: (1) a decay heat transient test, (2) Loss-of-Piping-Integrity (LOPI) tests, (3) Boiling Window Tests (BWT), and (4) a fuel pin dryout and failure test. In addition, preliminary tests were run to check systems performance, instrumentation performance and test section heat balance. The objective of the decay heat test was to determine the decay heat transfer characteristics of fresh fuel pins with subcooled sodium. The objective of the LOPI experiments was to test the thermal behavior of fuel pins with four different fuel conditions subjected to the same transient. The transient was designed to simulate a rapid flow decrease as a result of pipe rupture followed by a reactor scram. The objective of the Boiling Window Tests was to study boiling initiation and progression of boiling within the fuel pin bundle.

Knight, D.D.

1980-10-01T23:59:59.000Z

447

Integrated Vehicle Thermal Management Systems (VTMS) Analysis...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Integrated Vehicle Thermal Management Power Electronic Thermal System Performance and Integration Characterization and Development of Advanced Heat Transfer Technologies...

448

Energy-Efficient Window Treatments | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy-Efficient Window Treatments Energy-Efficient Window Treatments Energy-Efficient Window Treatments September 25, 2012 - 9:04am Addthis The awnings on this home shade the windows and generate electricity. | Photo courtesy of ©iStockphoto/jhorrocks The awnings on this home shade the windows and generate electricity. | Photo courtesy of ©iStockphoto/jhorrocks What does this mean for me? Window treatments can reduce energy use in your home, and are less expensive than purchasing new, energy-efficient windows. In addition to saving energy, window treatments can be aesthetic additions to your home. You can choose window treatments or coverings not only for decoration but also for saving energy. Some carefully selected window treatments can reduce heat loss in the winter and heat gain in the summer. Window

449

Energy-Efficient Window Treatments | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Window Treatments Window Treatments Energy-Efficient Window Treatments September 25, 2012 - 9:04am Addthis The awnings on this home shade the windows and generate electricity. | Photo courtesy of ©iStockphoto/jhorrocks The awnings on this home shade the windows and generate electricity. | Photo courtesy of ©iStockphoto/jhorrocks What does this mean for me? Window treatments can reduce energy use in your home, and are less expensive than purchasing new, energy-efficient windows. In addition to saving energy, window treatments can be aesthetic additions to your home. You can choose window treatments or coverings not only for decoration but also for saving energy. Some carefully selected window treatments can reduce heat loss in the winter and heat gain in the summer. Window

450

Developing Low-Conductance Window Frames: Capabilities and Limitations of Current Window Heat Transfer Design Tools  

E-Print Network (OSTI)

across vertical fluid layers, Journal of Heat Transfer.fluid dynamics and conduction simulations of heat transferheat transfer through such window frames, we need, ideally, to simulate fluid

Gustavsen, Arild

2009-01-01T23:59:59.000Z

451

Two-Dimensional Computational Fluid Dynamics and Conduction Simulations of Heat Transfer in Horizontal Window Frames with Internal Cavities  

SciTech Connect

This paper assesses the accuracy of the simplified frame cavity conduction/convection and radiation models presented in ISO 15099 and used in software for rating and labeling window products. Temperatures and U-factors for typical horizontal window frames with internal cavities are compared; results from Computational Fluid Dynamics (CFD) simulations with detailed radiation modeling are used as a reference. Four different frames were studied. Two were made of polyvinyl chloride (PVC) and two of aluminum. For each frame, six different simulations were performed, two with a CFD code and four with a building-component thermal-simulation tool using the Finite Element Method (FEM). This FEM tool addresses convection using correlations from ISO 15099; it addressed radiation with either correlations from ISO 15099 or with a detailed, view-factor-based radiation model. Calculations were performed using the CFD code with and without fluid flow in the window frame cavities; the calculations without fluid flow were performed to verify that the CFD code and the building-component thermal-simulation tool produced consistent results. With the FEM-code, the practice of subdividing small frame cavities was examined, in some cases not subdividing, in some cases subdividing cavities with interconnections smaller than five millimeters (mm) (ISO 15099) and in some cases subdividing cavities with interconnections smaller than seven mm (a breakpoint that has been suggested in other studies). For the various frames, the calculated U-factors were found to be quite comparable (the maximum difference between the reference CFD simulation and the other simulations was found to be 13.2 percent). A maximum difference of 8.5 percent was found between the CFD simulation and the FEM simulation using ISO 15099 procedures. The ISO 15099 correlation works best for frames with high U-factors. For more efficient frames, the relative differences among various simulations are larger. Temperature was also compared, at selected locations on the frames. Small differences was found in the results from model to model. Finally, the effectiveness of the ISO cavity radiation algorithms was examined by comparing results from these algorithms to detailed radiation calculations (from both programs). Our results suggest that improvements in cavity heat transfer calculations can be obtained by using detailed radiation modeling (i.e. view-factor or ray-tracing models), and that incorporation of these strategies may be more important for improving the accuracy of results than the use of CFD modeling for horizontal cavities.

Gustavsen, Arlid; Kohler, Christian; Dalehaug, Arvid; Arasteh, Dariush

2008-12-01T23:59:59.000Z

452

Time-slide window join over data streams  

Science Journals Connector (OSTI)

The join is an important operator in processing data streams. To produce outputs continuously over unbounded data streams, sliding windows are generally used to limit the scope of the join at a certain time. In the existing join algorithms, only a simple ... Keywords: Data streams, symmetric hash join, time-slide windows, window join, windowing structure

Hyeon Gyu Kim, Yoo Hyun Park, Yang Hyun Cho, Myoung Ho Kim

2014-10-01T23:59:59.000Z

453

Assessment of Energy Impact of Window Technologies for Commercial Buildings  

E-Print Network (OSTI)

electrochromic windows were technically successful, but it will take a number of years for significant market

Hong, Tianzhen

2014-01-01T23:59:59.000Z

454

A scalable and tiling multi-monitor aware window manager  

Science Journals Connector (OSTI)

The design of a prototypical scalable and tiling multi-monitor aware window manager is described that may overcome some of the layout management problems encountered with tiling window managers. The system also features a novel approach to monitor configuration ... Keywords: distal access, monitor configuration, multiple monitors, window management, window manager

Joona Antero Laukkanen

2011-05-01T23:59:59.000Z

455

Advanced Window and Shading Technologies  

Energy.gov (U.S. Department of Energy (DOE))

Lead Performer: Lawrence Berkeley National Laboratory - Berkeley, CA Partners: -- Saint-Gobin - Valley Forge, PA -- Sage Electrochromics - Faribault, MN -- Dow Chemical - Midland, MI -- Lutron - Coopersburg, PA -- 3M - Maplewood, MN -- Tongji University - Shanghai, China -- China Academy of Building Research - Beijing, China -- Chongqing University - Chongqing, China

456

Building America Top Innovations 2013 Profile Â… Window Replacement, Rehabilitation, & Repair Guide  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

such as working on scaffolding are also discussed. such as working on scaffolding are also discussed. Water infiltration is dealt with at considerable length because windows are one of the likeliest components in the building structure for water entry and because water intrusion and resultant damage may have gone on unnoticed for some time as water can enter the wall cavity through and around the window assembly. Suggestions for investigating sources of water intrusion are provided. The condition of the decorative trim around the window can be an indication of water damage but deterioration of the trim is typically an aesthetic problem not a performance problem. However, if the window sill is damaged, it should be replaced because it is the means by which water will drain out away from the house or,

457

Measurement of the solar heat gain coefficient and U value of windows with insect screens  

SciTech Connect

Energy ratings are currently being used in a number of countries to assist in the selection of windows and doors based on energy performance. Developed for simple comparison purposes, these rating numbers do not take into account window removable attachments such as insect screens that are, nevertheless, widely used. Research was carried out to assess the effect of insect screens on the heat gains and losses of windows. The work reported in this paper deals with the effect of one screen type on the performance of a base-case, double-glazed window. Using an indoor solar simulator facility, measurements of the window solar heat gain coefficient (SHGC) and U value were made for different screen attachment configurations and climatic conditions. Results with the sample window tested indicate that insect screens placed on the outdoor side can reduce its SHGC by 46% with only a 7% reduction in its U value (0.19 W/m{sup 2}{center_dot}C), and that insect screens placed on the indoor side can reduce its SHGC by 15% while reducing its U value by 14% (0.38 W/m{sup 2}{center_dot}C).

Brunger, A.; Dubrous, F.M.; Harrison, S.

1999-07-01T23:59:59.000Z

458

Thermal Stress and Reliability for Advanced Power Electronics...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Thermal Stress and Reliability for Advanced Power Electronics and Electric Machines Power Electronic Thermal System Performance and Integration Thermal Performance and...

459

New and Underutilized Technology: Smart Windows | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Smart Windows Smart Windows New and Underutilized Technology: Smart Windows October 8, 2013 - 2:55pm Addthis The following information outlines key deployment considerations for smart windows within the Federal sector. Benefits Smart windows are made of electrochromic glass, which uses electrical energy to transition between clear and darkened state to control light and heat gain. Darkened glass transmits less light and reduces heat gain, especially in dual-pane windows. Application Smart windows are appropriate for deployment within most building categories and should be considered in building design, renovation, or during window replacement projects. Key Factors for Deployment Window orientation is a factor that must be considered prior to smart window implementation. Ranking Criteria

460

New and Underutilized Technology: Window Films | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Window Films Window Films New and Underutilized Technology: Window Films October 8, 2013 - 2:50pm Addthis The following information outlines key deployment considerations for window films within the Federal sector. Benefits Window films are a spectrally-selective film used to decrease heat gain through a window. Application Window films are appropriate for deployment within most building categories and should be considered in building design, renovation, or during window replacement projects. Key Factors for Deployment Window orientation is a factor that must be considered prior to window film implementation. Ranking Criteria Federal energy savings, cost-effectiveness, and probability of success are ranked 0-5 with 0 representing the lowest ranking and 5 representing the highest ranking. The weighted score is ranked 0-100 with 0 representing the

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461

3.5 Histogram Zoomable Window  

NLE Websites -- All DOE Office Websites (Extended Search)

5.1 Summary States Up: 3. Graphical User Interface Previous: 3.4.4 5.1 Summary States Up: 3. Graphical User Interface Previous: 3.4.4 Row Adjustment Panel Contents 3.5 Histogram Zoomable Window Figure 3.23: Histogram window of the whole duration shown in Figure 3.10. Image histogram_state_all_cumu_excl The Histogram window is created by clicking the statistics button located in the middle of Duration Info Box, shown in Figure 3.19. In Figure 3.23, the Histogram window is created for the whole duration of the timeline canvas in Figure 3.10, that is, the same duration as the complete slog2 file. In general, the total duration of the histogram canvas is the same as the duration marked by the Duration Info Box, so that the Histogram window functions like a graphical display of statistical summary of the duration of interest. For instance, it is obvious from Figure 3.23 that the yellow

462

Radcalc for Windows validation and benchmark study  

SciTech Connect

Radcalc for Windows, version 2.01 (Radcalc), is a software program developed by Waste Management Federal Services, Inc., Northwest Operations for the US Department of Energy. It is used to generate selected transportation and packaging data necessary for the shipment of radioactive waste materials. Among its applications are the classification of waste per US Department of Transportation regulations, the calculation of heat and daughter products generated as a result of radioactive decay, and the calculation of the radiolytic production of hydrogen gas. The Radcalc program has been extensively tested and validated by comparison of each Radcalc algorithm to hand calculations. An opportunity to benchmark Radcalc hydrogen gas generation calculations to experimental data arose when the Rocky Flats Environmental Technology Site (REFETS) residue stabilization program collected hydrogen gas generation data to determine compliance with requirements for shipment of waste in the TRUPACT-II. Previously, Radcalc had been benchmarked to residue/waste drums tested at RFETS containing contaminated solid inorganic materials in plastic bags. In this paper Radcalc is compared with data collected for contaminated solid organic waste. The contamination is predominantly due to plutonium and americium isotopes. The information provided by RFETS includes decay heat, hydrogen gas generation rates, calculated hydrogen G{sub eff} values (molecules of hydrogen formed per 100-eV decay heat energy released), and waste material. Radcalc cases are run using RFETS G{sub eff} values, TRUPACT-II G values, and dose-dependent G values. Work on calculating the radiolytic production of hydrogen gas and related increase in package pressure has also been performed at the Savannah River Site (SRS) in support of efforts to ship nuclear materials in the 9975 package. The calculations made at SRS are contained in an Excel spreadsheet. The SRS model has been compared with experimental data collected at SRS and at Los Alamos National Laboratory.

McFadden, J.G.; Knepp, J.R.

1999-07-01T23:59:59.000Z

463

Electro-Thermal Dynamics and the Effects of Generalized Discontinuous Pulse Width Modulation Algorithms on High Performance Variable Frequency Drives.  

E-Print Network (OSTI)

??This thesis is concerned with issues observed with the variable frequency drive, VFD, traction inverter used in the Buckeye Bullet 3 as it performed during… (more)

Krohn, Austin Bengoechea

2014-01-01T23:59:59.000Z

464

Welcome to the Efficient Windows Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Membership List Membership List Manufacturers | Suppliers | Affiliates Manufacturers Accent Accent Windows exit disclaimer 14175 East 2nd Avenue Denver, CO 80239 AccurateDorwin Accurate Dorwin exit disclaimer 1535 Seel Avenue Winnipeg, Manitoba Canada, R3T 1C6 1-888-982-4640 Alpine Alpine Windows exit disclaimer 3773 State Road Cuyahoga Falls, OH 44223 Alside ALSIDE, Inc. exit disclaimer 3773 State Road Cuyahoga Falls, OH 44223 American Exteriors American Exteriors, LLC exit disclaimer 1169 W. Littleton Blvd. Littleton, CO 80120 Amerimax Amerimax Windows & Doors exit disclaimer 3950 Medford Drive Loveland, CO 80538 Andersen Andersen Corporation exit disclaimer 100 N. 4th Avenue Bayport, MN 55003 Charter Member Associated Materials Associated Materials, Inc. exit disclaimer 3773 State Road