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1

Heating, Ventilation, and Air Conditioning Renovations | Department of  

Broader source: Energy.gov (indexed) [DOE]

Heating, Ventilation, and Air Conditioning Renovations Heating, Ventilation, and Air Conditioning Renovations Heating, Ventilation, and Air Conditioning Renovations October 16, 2013 - 4:49pm Addthis Renewable Energy Options for HVAC Renovations Geothermal Heat Pumps (GHP) Solar Water Heating (SWH) Biomass Passive Solar Heating Biomass Heating Solar Ventilation Air Preheating Federal building renovations that encompass the heating, ventilation, and air conditioning (HVAC) systems in a facility provide a range of renewable energy opportunities. The primary technology option for HVAC renovations is geothermal heat pumps (GHP). Other options include leveraging a solar water heating (SWH) system to offset heating load or using passive solar heating or a biomass-capable furnace or boiler. Some facilities may also take

2

Section 38 - HVAC (Heating, Ventilation, Air Conditioning)  

Science Journals Connector (OSTI)

The term HVAC is an acronym for Heating, Ventilation (and) Air Conditioning, the industry term for any of various efforts to control conditions in a building or other enclosed area to improve comfort and efficiency. A closely related section is Refrigeration, which follows this one. Some contemporary HVAC techniques have ancient roots. Early forms of central heating and solar home heating were in use in Rome in the first century A.D. The earliest use of glass in windows (as opposed to a covering of wood, cloth, or hide, or simply an opening) is also attributed to the Romans at this same time. The first known use of solar-oriented building design in North America dates back to about the year 1050; i.e., the cliff dwellings built by the Anasazi (Ancient Pueblo) people of the Colorado Plateau area. Geothermal district heating was employed as early as the 1300s, in the Auvergne region of southern France. The foundation for modern central heating was established in the 1700s, first in England and then in France. The 1800s saw significant advances in the use of water heaters, especially the first automatic storage water heater (Edwin Ruud, 1889) and the first commercial solar water heater (Clarence Kemp, 1891). In comparison with heating, cooling technology was late in developing. The first successful method of producing ice occurred in 1851, and it was not until 1902 that Willis Haviland Carrier designed the first industrial air-conditioning system. His Carrier Air Conditioning Corporation would go on to develop air-conditioning systems for stores and theaters (1924) and for residential buildings (1928). Carrier remains the global leader in air conditioner production. The first air-conditioned automobile was produced by Packard in 1939. Recent entries in this section emphasize the use of alternative energy sources in heating and cooling, such as solar, photovoltaic, geothermal, and fuel cells. These advances include the ground-source heat pump, the Trombe wall, the heat pipe, and the PV/thermal hybrid system.

Cutler J. Cleveland; Christopher Morris

2014-01-01T23:59:59.000Z

3

Maintenance Guide for Greenhouse Ventilation, Evaporative Cooling Heating Systems1  

E-Print Network [OSTI]

condensation in winter, reduced life and reliability of ventilation equipment, and high repair bills cooling and heating systems. VENTILATION SYSTEMS The operating efficiency of a ventilation fan can be pockets of stagnant air, inadequate cooling from evaporative cooling pads, high heating expenses, heavy

Watson, Craig A.

4

Honda Smart Home to Include Berkeley Lab Ventilation Controller  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Honda Smart Home to Include Berkeley Lab Ventilation Controller Honda Smart Home to Include Berkeley Lab Ventilation Controller Honda smart home October 2013 October-November Special Focus: Energy Efficiency, Buildings, and the Electric Grid Honda Motor Company Inc is proceeding with plans to build a Smart Home in Davis, California, to demonstrate the latest in renewable energy technologies and energy efficiency. The home is expected to produce more energy than is consumed, demonstrating how the goal of "zero net energy" can be met in the near term future. A ventilation controller developed by researchers at Berkeley Lab's Environmental Energy Technologies Division (EETD) will be included in the smart home. EETD is currently working with the developers of the home control system to integrate its control algorithms.

5

Heating, Ventilation and Air Conditioning Efficiency  

Broader source: Energy.gov (indexed) [DOE]

Presented By: WALTER E. JOHNSTON, PE Presented By: WALTER E. JOHNSTON, PE CEM, CEA, CLEP, CDSM, CPE Heating, Ventilation and Air Conditioning (HVAC) system is to provide and maintain a comfortable environment within a building for the occupants or for the process being conducted Many HVAC systems were not designed with energy efficiency as one of the design factors 3 Air Air is the major conductor of heat. Lack of heat = air conditioning OR 4 Btu - Amount of heat required to raise one pound of water 1 F = 0.252 KgCal 1 Pound of Water = About 1 Pint of Water ~ 1 Large Glass 1 Kitchen Match Basics of Air Conditioning = 1 Btu 5 = 6 Low Cost Cooling Unit 7 8 Typical Design Conditions 75 degrees F temperature 50% relative humidity 30 - 50 FPM air movement

6

Heating, Ventilation, and Air Conditioning Projects | Department...  

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

- Grenada, MS -- International Copper Association - New York, NY -- Wieland - Ulm, Germany -- Heat Transfer Technologies - Abington, PA Multi-Function Fuel-Fired Heat Pump...

7

Energy Saving Guidelines for Portland State University Heating and Ventilation  

E-Print Network [OSTI]

Energy Saving Guidelines for Portland State University Heating and Ventilation Conditioned spaces when a space is not being occupied and be selected with energy efficiency and safety as top priorities scheduling team to consolidate activities into energy efficient buildings on campus. Purchasing When

Caughman, John

8

Multifamily Individual Heating and Ventilation Systems, Lawrence...  

Energy Savers [EERE]

each apartment were much higher than the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) 62.2 rate; an extensive system of ductwork, smoke and...

9

Multifamily Individual Heating and Ventilation Systems, Lawrence, Massachusetts (Fact Sheet)  

SciTech Connect (OSTI)

The conversion of an older Massachusetts building into condominiums illustrates a safe, durable, and cost-effective solution for heating and ventilation systems that can potentially benefit millions of multifamily buildings. Merrimack Valley Habitat for Humanity (MVHfH) partnered with U.S. Department of Energy Building America team Building Science Corporation (BSC) to provide high performance affordable housing for 10 families in the retrofit of an existing mass masonry building (a former convent). The original ventilation design for the project was provided by a local engineer and consisted of a single large heat recovery ventilator (HRV) located in a mechanical room in the basement with a centralized duct system providing supply air to the main living space and exhausting stale air from the single bathroom in each apartment. This design was deemed to be far too costly to install and operate for several reasons: the large central HRV was oversized and the specified flows to each apartment were much higher than the ASHRAE 62.2 rate; an extensive system of ductwork, smoke and fire dampers, and duct chases were specified; ductwork required a significant area of dropped ceilings; and the system lacked individual ventilation control in the apartments

Not Available

2013-11-01T23:59:59.000Z

10

IMPROVED STEAM APPARATUS FOR HEATING AND VENTILATING  

Science Journals Connector (OSTI)

...iilprovenments in these heaters, The hleatei is...all parts of the heater. The pipes in the...foot of pipe. In operation for heating andl...at or towards the cold outer v but it must...changes in the weather always have a serious...passing through the heater causes such a rapid...

1889-05-03T23:59:59.000Z

11

Should Title 24 Ventilation Requirements Be Amended to include an Indoor Air Quality Procedure?  

SciTech Connect (OSTI)

Minimum outdoor air ventilation rates (VRs) for buildings are specified in standards, including California?s Title 24 standards. The ASHRAE ventilation standard includes two options for mechanically-ventilated buildings ? a prescriptive ventilation rate procedure (VRP) that specifies minimum VRs that vary among occupancy classes, and a performance-based indoor air quality procedure (IAQP) that may result in lower VRs than the VRP, with associated energy savings, if IAQ meeting specified criteria can be demonstrated. The California Energy Commission has been considering the addition of an IAQP to the Title 24 standards. This paper, based on a review of prior data and new analyses of the IAQP, evaluates four future options for Title 24: no IAQP; adding an alternate VRP, adding an equivalent indoor air quality procedure (EIAQP), and adding an improved ASHRAE-like IAQP. Criteria were established for selecting among options, and feedback was obtained in a workshop of stakeholders. Based on this review, the addition of an alternate VRP is recommended. This procedure would allow lower minimum VRs if a specified set of actions were taken to maintain acceptable IAQ. An alternate VRP could also be a valuable supplement to ASHRAE?s ventilation standard.

Dutton, Spencer M.; Mendell, Mark J.; Chan, Wanyu R.

2013-05-13T23:59:59.000Z

12

Economic Analysis and Optimization of Exterior Insulation Requirements for Ventilated Buildings at Power Generation Facilities with High Internal Heat Gain  

E-Print Network [OSTI]

Industrial buildings require a large amount of heating and ventilation equipment to maintain the indoor environment within acceptable levels for personnel protection and equipment protection. The required heating and ventilation equipment...

Hughes, Douglas E.

2010-12-17T23:59:59.000Z

13

HEAT TRANSFERS IN A DOUBLE SKIN ROOF VENTILATED BY NATURAL CONVECTION IN SUMMER TIME  

E-Print Network [OSTI]

1 HEAT TRANSFERS IN A DOUBLE SKIN ROOF VENTILATED BY NATURAL CONVECTION IN SUMMER TIME P. H or in tropical and arid countries. In this work, radiation, convection and conduction heat transfers-dimensional numerical simulation of the heat transfers through the double skin reveals the most important parameters

Boyer, Edmond

14

Cryostat including heater to heat a target  

DOE Patents [OSTI]

A cryostat is provided which comprises a vacuum vessel; a target disposed within the vacuum vessel; a heat sink disposed within the vacuum vessel for absorbing heat from the detector; a cooling mechanism for cooling the heat sink; a cryoabsorption mechanism for cryoabsorbing residual gas within the vacuum vessel; and a heater for maintaining the target above a temperature at which the residual gas is cryoabsorbed in the course of cryoabsorption of the residual gas by the cryoabsorption mechanism. 2 figs.

Pehl, R.H.; Madden, N.W.; Malone, D.F.

1990-09-11T23:59:59.000Z

15

Heat balance for two commercial broiler barns with solar preheated ventilation air  

Science Journals Connector (OSTI)

In temperate climatic zones, solar air heaters can reduce heating loads, and increase winter ventilation rates thereby improving inside air quality and livestock performance without additional fuel input. A heat balance was carried out to measure bird heat production under field conditions on two commercial broiler barns to evaluate the impact of solar heated ventilation air on bird performance, and identify strategies to reduce winter heating load. Located 40 km east of Montreal, Canada, the experimental broiler barns were identically built with three floors housing 6500 birds per floor in an all-in all-out fashion. Equipped with solar air pre-heaters over their fresh air inlets, the barns were instrumented to monitor inlet, inside and outside air conditions, ventilation rate and heating system operating time. The effects on bird performance were observed from November 2007 to March 2009 by alternating their operation between the barns. The measured sensible and total heat productions of 4.5 W and 8.4 W, respectively, for 1 kg birds corresponded to laboratory measured values. Bird performance was not affected by the solar air pre-heaters which increased the ventilation rate above normal during only 20% of the daytime period. Room air temperature stratification resulted in 20–40 kW of heat losses during the winter, representing 25% of the total natural gas heat load. Because inside air moved directly to the fans, large and rapid increases in ventilation inlet air temperature, produced by the solar air pre-heaters, resulted in further heat losses equivalent to 15% of the solar energy recovered. Sustainable energy management in livestock barns requiring heating should incorporate an air mixing system to eliminate air temperature stratification and improve fan flows.

Sébastien Cordeau; Suzelle Barrington

2010-01-01T23:59:59.000Z

16

The Ventilation, Heating, and Management of Churches and Public Buildings  

Science Journals Connector (OSTI)

... THIS book is addressed chiefly to the architects, managers and caretakers of buildings, and its opening chapter deals with the physical principles bearing on ventilation. An interesting ... the writer makes the cryptic statement that "the friction caused by the wind passing over buildings is so great that it is scarcely possible to demonstrate it accurately,"and later ...

J. H. V.

1903-04-02T23:59:59.000Z

17

Conjugate heat transfer in enclosures with openings for ventilation  

Science Journals Connector (OSTI)

The direct and indirect solar chimney principle has been used for heating of...12...]). In heating applications, for example, the dwelling is simulated as an enclosure having a solar chimney located towards the s...

E. Bilgen; T. Yamane

2004-03-01T23:59:59.000Z

18

UC Berkeley Heat/Ventilation Curtailment Period DECEMBER 24, 2011 through JANUARY 1, 2012  

E-Print Network [OSTI]

and January 1, 2012 in order to conserve energy, most campus buildings will be closed and heat and ventilation that a building be exempt from energy curtailment. If you would like to request that your building be exempt from. Technical questions or concerns about energy curtailment can be directed to Gilbert Escobar at 3

California at Irvine, University of

19

Exergy–economic evaluation of heat recovery device in mechanical ventilation system  

Science Journals Connector (OSTI)

Abstract The paper presents new approach in evaluation of heat recovery devices in mechanical ventilation system. The evaluation is based on exergy balance equation and economic analysis, what requires application of one of multicriteria decision aid methods—weighted sum method. The proposed set of evaluation criteria consists of: driving exergy, simple payback time and investment cost. The proposed method is applied to compare the four variants of heat recovery device in inlet-exhaust mechanical ventilation system of the capacity of 10,000 m3/h installed in residential part of hotel. The analysis is performed for four preference models. The results of the multicriteria evaluation indicate that counter flow plate heat exchanger and the rotating heat/mass regenerator are better solutions comparing with water loop heat exchanger and heat pipe heat exchanger. Counter flow plate heat exchanger is the most compromise solution for the two preference models PREF_00 (based on statistic approach) and PREF_03 (investment cost priority preference model). Rotating heat/mass regenerator is the most compromise solution for the preference model 01 (driving exergy priority preference model). The proposed method can be helpful in the choice of the most compromise solution of the heat recovery device in pre-design phase.

Tomasz M. Mróz; Anna Dutka

2015-01-01T23:59:59.000Z

20

A genetic rule weighting and selection process for fuzzy control of heating, ventilating and air conditioning systems  

Science Journals Connector (OSTI)

In this paper, we propose the use of weighted linguistic fuzzy rules in combination with a rule selection process to develop accurate fuzzy logic controllers dedicated to the intelligent control of heating, ventilating and air conditioning systems concerning ... Keywords: BEMS, building energy management system, FLC, fuzzy logic controller, Fuzzy logic controllers, GA, genetic algorithm, Genetic algorithms, HVAC systems, HVAC, heating, ventilating, and air conditioning, KB, knowledge base, PMV, predicted mean vote index for thermal comfort, Rule selection, Weighted fuzzy rules

Rafael Alcalá; Jorge Casillas; Oscar Cordón; Antonio González; Francisco Herrera

2005-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

DEMAND CONTROLLED VENTILATION AND CLASSROOM VENTILATION  

SciTech Connect (OSTI)

This document summarizes a research effort on demand controlled ventilation and classroom ventilation. The research on demand controlled ventilation included field studies and building energy modeling. Major findings included: ? The single-location carbon dioxide sensors widely used for demand controlled ventilation frequently have large errors and will fail to effectively control ventilation rates (VRs).? Multi-location carbon dioxide measurement systems with more expensive sensors connected to multi-location sampling systems may measure carbon dioxide more accurately.? Currently-available optical people counting systems work well much of the time but have large counting errors in some situations. ? In meeting rooms, measurements of carbon dioxide at return-air grilles appear to be a better choice than wall-mounted sensors.? In California, demand controlled ventilation in general office spaces is projected to save significant energy and be cost effective only if typical VRs without demand controlled ventilation are very high relative to VRs in codes. Based on the research, several recommendations were developed for demand controlled ventilation specifications in the California Title 24 Building Energy Efficiency Standards.The research on classroom ventilation collected data over two years on California elementary school classrooms to investigate associations between VRs and student illness absence (IA). Major findings included: ? Median classroom VRs in all studied climate zones were below the California guideline, and 40percent lower in portable than permanent buildings.? Overall, one additional L/s per person of VR was associated with 1.6percent less IA. ? Increasing average VRs in California K-12 classrooms from the current average to the required level is estimated to decrease IA by 3.4percent, increasing State attendance-based funding to school districts by $33M, with $6.2 M in increased energy costs. Further VR increases would provide additional benefits.? Confirming these findings in intervention studies is recommended. ? Energy costs of heating/cooling unoccupied classrooms statewide are modest, but a large portion occurs in relatively few classrooms.

Fisk, William J.; Mendell, Mark J.; Davies, Molly; Eliseeva, Ekaterina; Faulkner, David; Hong, Tienzen; Sullivan, Douglas P.

2014-01-06T23:59:59.000Z

22

Breathing HRV by the Concept of AC Ventilation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Breathing HRV by the Concept of AC Ventilation Breathing HRV by the Concept of AC Ventilation Speaker(s): Hwataik Han Date: July 10, 2007 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Thomas McKone Heat recovery ventilators are frequently used to save heating/cooling loads of buildings for ventilation. There are several types of HRV's, including a parallel plate type, a rotary type, a capillary type, and a heat pipe type. The breathing HRV is a heat recovery ventilator of a new kind using the concept of alternating-current ventilation. The AC ventilation is the ventilation with the airflow directions reversed periodically. It has an advantage of using a single duct system, for both supply and exhaust purposes. In order to develop a breathing HRV system, the thermal recovery performance should be investigated depending on many parameters, such as

23

Proposal for the award of a contract for the design, supply, installation and commissioning of an HVAC (Heating, Ventilation and Air Conditioning) system for Building 3862  

E-Print Network [OSTI]

Proposal for the award of a contract for the design, supply, installation and commissioning of an HVAC (Heating, Ventilation and Air Conditioning) system for Building 3862

2014-01-01T23:59:59.000Z

24

Proposal for the award of a contract for the design, supply, installation and commissioning of Heating, Ventilation and Air-Conditioning (HVAC) systems for the PS accelerator infrastructure  

E-Print Network [OSTI]

Proposal for the award of a contract for the design, supply, installation and commissioning of Heating, Ventilation and Air-Conditioning (HVAC) systems for the PS accelerator infrastructure

2012-01-01T23:59:59.000Z

25

Proposal for the award of a contract for dismantling, removal and packaging of the existing Heating, Ventilation and Air-Conditioning (HVAC) systems in the PS tunnel  

E-Print Network [OSTI]

Proposal for the award of a contract for dismantling, removal and packaging of the existing Heating, Ventilation and Air-Conditioning (HVAC) systems in the PS tunnel

2012-01-01T23:59:59.000Z

26

2014-02-07 Issuance: Certification of Commercial Heating, Ventilation, and Air-conditioning, Water Heating, and Refrigeration Equipment; Notice of Proposed Rulemaking  

Broader source: Energy.gov [DOE]

This document is a pre-publication Federal Register notice of proposed rulemaking regarding certification of commercial heating, ventilation, and air-conditioning, water-heating, and refrigeration equipment, as issued by the Deputy Assistant Secretary for Energy Efficiency on February 7, 2014.

27

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

2 2 Main Commercial Heating and Cooling Equipment as of 1995, 1999, and 2003 (Percent of Total Floorspace) (1) Heating Equipment 1995 1999 2003 (2) Cooling Equipment 1995 1999 2003 (2) Packaged Heating Units 29% 38% 28% Packaged Air Conditioning Units 45% 54% 46% Boilers 29% 29% 32% Individual Air Conditioners 21% 21% 19% Individual Space Heaters 29% 26% 19% Central Chillers 19% 19% 18% Furnaces 25% 21% 30% Residential Central Air Conditioners 16% 12% 17% Heat Pumps 10% 13% 14% Heat Pumps 12% 14% 14% District Heat 10% 8% 8% District Chilled Water 4% 4% 4% Other 11% 6% 5% Swamp Coolers 4% 3% 2% Other 2% 2% 2% Note(s): Source(s): 1) Heating and cooling equipment percentages of floorspace total more than 100% since equipment shares floorspace. 2) Malls are no longer included in most CBECs tables; therefore, some data is not directly comparable to past CBECs.

28

An experimental system for advanced heating, ventilating and air conditioning (HVAC) control  

Science Journals Connector (OSTI)

While having the potential to significantly improve heating, ventilating and air conditioning (HVAC) system performance, advanced (e.g., optimal, robust and various forms of adaptive) controllers have yet to be incorporated into commercial systems. Controllers consisting of distributed proportional-integral (PI) control loops continue to dominate commercial HVAC systems. Investigation into advanced HVAC controllers has largely been limited to proposals and simulations, with few controllers being tested on physical systems. While simulation can be insightful, the only true means for verifying the performance provided by HVAC controllers is by actually using them to control an HVAC system. The construction and modeling of an experimental system for testing advanced HVAC controllers, is the focus of this article. A simple HVAC system, intended for controlling the temperature and flow rate of the discharge air, was built using standard components. While only a portion of an overall HVAC system, it is representative of a typical hot water to air heating system. In this article, a single integrated environment is created that is used for data acquisition, controller design, simulation, and closed loop controller implementation and testing. This environment provides the power and flexibility needed for rapid prototyping of various controllers and control design methodologies.

Michael Anderson; Michael Buehner; Peter Young; Douglas Hittle; Charles Anderson; Jilin Tu; David Hodgson

2007-01-01T23:59:59.000Z

29

FEMP Expands ESPC ENABLE Program to Include More Energy Conservation...  

Energy Savers [EERE]

(ESPC) ENABLE program to include two new energy conservation measures (ECMs): solar photovoltaic (PV) and simple one-for-one heating, ventilation, and air conditioning (HVAC)...

30

Numerical Simulation of a Displacement Ventilation System with Multi-heat Sources and Analysis of Influential Factors  

E-Print Network [OSTI]

Displacement ventilation (DV) is a promising ventilation concept due to its high ventilation efficiency. In this paper, the application of the CFD method, the velocity and temperature fields of three-dimensional displacement ventilation systems...

Wu, X.; Gao, J.; Wu, W.

2006-01-01T23:59:59.000Z

31

US Department of Energys Regulatory Negotiations Convening on Commercial Certification for Heating, Ventilating, Air-Conditioning, and Refrigeration Equipment  

Broader source: Energy.gov [DOE]

This document provides Public Information for Convening Interviews for US Department of Energys Regulatory Negotiations Convening on Commercial Certification for Heating, Ventilating, Air-Conditioning, and Refrigeration Equipment

32

Review of Residential Ventilation Technologies.  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Review of Residential Ventilation Technologies. Review of Residential Ventilation Technologies. Title Review of Residential Ventilation Technologies. Publication Type Journal Article LBNL Report Number LBNL-57730 Year of Publication 2007 Authors Russell, Marion L., Max H. Sherman, and Armin F. Rudd Journal HVAC&R Research Volume 13 Start Page Chapter Pagination 325-348 Abstract This paper reviews current and potential ventilation technologies for residential buildings in North America and a few in Europe. The major technologies reviewed include a variety of mechanical systems, natural ventilation, and passive ventilation. Key parameters that are related to each system include operating costs, installation costs, ventilation rates, heat recovery potential. It also examines related issues such as infiltration, duct systems, filtration options, noise, and construction issues. This report describes a wide variety of systems currently on the market that can be used to meet ASHRAE Standard 62.2. While these systems generally fall into the categories of supply, exhaust or balanced, the specifics of each system are driven by concerns that extend beyond those in the standard and are discussed. Some of these systems go beyond the current standard by providing additional features (such as air distribution or pressurization control). The market will decide the immediate value of such features, but ASHRAE may wish to consider modifications to the standard in the future.

33

Techno-economic evaluation of a ventilation system assisted with exhaust air heat recovery, electrical heater and solar energy  

Science Journals Connector (OSTI)

Abstract The energy consumed to condition fresh air is considerable, particularly for the buildings such as cinema, theatre or gymnasium saloons. The aim of the present study is to design a ventilation system assisted with exhaust air heat recovery unit, electrical heater and stored solar energy, then to make an economical analysis based on life cycle cost (LCC) to find out its payback period. The system is able to recover thermal energy of exhaust air, store solar energy during the sunlight period and utilize it in the period between 17:00 and 24:00 h. The transient behaviour of the system is simulated by the TRNSYS 16 software for winter period from 1st of November to 31st of March for Izmir city of Turkey. The obtained results show that the suggested ventilation system reduces energy consumption by 86% compared to the conventional ventilation system in which an electrical heater is used. The payback period of the suggested system is found to be 5 years and 8 months which is a promising result in favour of the solar energy usage in building ventilation systems.

Gamze Ozyogurtcu; Moghtada Mobedi; Baris Ozerdem

2014-01-01T23:59:59.000Z

34

Including radiative heat transfer and reaction quenching in modeling a Claus plant waste heat boiler  

SciTech Connect (OSTI)

Due to increasingly stringent sulfur emission regulations, improvements are necessary in the modified Claus process. A recently proposed model by Nasato et al. for the Claus plant waste heat boiler (WHB) is improved by including radiative heat transfer, which yields significant changes in the predicted heat flux and the temperature profile along the WHB tube, leading to a faster quenching of chemical reactions. For the WHB considered, radiation accounts for approximately 20% of the heat transferred by convection alone. More importantly, operating the WHB at a higher gas mass flux is shown to enhance reaction quenching, resulting in a doubling of the predicted hydrogen flow rate. This increase in hydrogen flow rate is sufficient to completely meet the hydrogen requirement of the H[sub 2]S recovery process considered, which would eliminate the need for a hydrogen plant.

Karan, K.; Mehrotra, A.K.; Behie, L.A. (Univ. of Calgary, Alberta (Canada). Dept. of Chemical and Petroleum Engineering)

1994-11-01T23:59:59.000Z

35

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

3 3 Residential Boiler Efficiencies (1) Gas-Fired Boilers Oil-Fired Boilers Average shipped in 1985 (2): 74% AFUE Average shipped in 1985 (2): 79% AFUE Best Available in 1981: 81% AFUE Best Available in 1981: 86% AFUE Best Available in 2007: 96% AFUE Best Available in 2007: 89% AFUE Note(s): Source(s): 1) Federal appliance standards effective Jan. 1, 1992, require a minimum of 80% AFUE (except gas-fired steam boiler, which must have a 75% AFUE or higher). 2) Includes furnaces. GAMA, Consumer's Directory of Certified Efficiency Ratings for Residential Heating and Water Heating Equipment, Aug. 2005, p. 88 and 106 for best- available AFUE; and GAMA for 1985 average AFUEs; GAMA Tax Credit Eligible Equipment: Gas- and Oil-Fired Boilers 95% AFUE or Greater, May 2007; and GAMA Consumer's Directory of Certified Efficiency Ratings for Heating and Water Heating Equipment, May 2007

36

Demand Controlled Ventilation and Classroom Ventilation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 3 Authors Fisk, William J., Mark J. Mendell, Molly Davies, Ekaterina Eliseeva, David Faulkner, Tienzen Hong, and Douglas P. Sullivan Publisher Lawrence Berkeley National Laboratory City Berkeley Keywords absence, building s, carbon dioxide, demand - controlled ventilation, energy, indoor air quality, schools, ventilation Abstract This document summarizes a research effort on demand controlled ventilation and classroom ventilation. The research on demand controlled ventilation included field studies and building energy modeling. Major findings included:  The single-location carbon dioxide sensors widely used for demand controlled ventilation frequently have large errors and will fail to effectively control ventilation rates (VRs).  Multi-location carbon dioxide measurement systems with more expensive sensors connected to multi-location sampling systems may measure carbon dioxide more accurately.

37

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

U.S. Heating and Air-Conditioning System Manufacturer Shipments, by Type (Including Exports) 2005 Value of 2000 2005 2007 2009 2010 Shipments Equipment Type (1,000s) (1,000s) (1,000s) (1,000s) (1,000s) ($million) (7) Air-Conditioners (1) 5,346 6,472 4,508 3,516 3419 5,837 Heat Pumps 1,539 2,336 1,899 1,642 1,748 2,226 Air-to-Air Heat Pumps 1,339 2,114 1,899 1,642 1748 1,869 Water-Source Heat Pumps (2) 200 222 N.A. N.A. N.A. 357 Chillers 38 37 37 25 29 1,093 Reciprocating 25 24 30 20 24 462 Centrifugal/Screw 8 6 7 5 5 566 Absorption (3) 5 7 N.A. N.A. N.A. 64 Furnaces 3,681 3,624 2,866 2,231 2,509 2,144 Gas-Fired (4) 3,104 3,512 2,782 2,175 2453 2,081 Electric 455 N.A. N.A. N.A. N.A. N.A. Oil-Fired (5) 121 111 84 56 56 63 Boilers (6) 368 370 N.A. N.A. N.A. N.A. Note(s): Source(s): 1) Includes exports and gas air conditioners (gas units <10,000 units/yr) and rooftop equipment. Excludes heat pumps, packaged terminal air

38

Radon Mitigation in Schools Utilising Heating, Ventilating and Air Conditioning Systems  

Science Journals Connector (OSTI)

......and Air Conditioning Engineers (ASHRAE) standard Ventilation for Acceptable Indoor Air Quality...Two case studies are presented where HVAC technology was implemented for controlling...system in a two-storey building. The HVAC system's controls were restored and modified......

G. Fisher; B. Ligman; T. Brennan; R. Shaughnessy; B.H. Turk; B. Snead

1994-12-01T23:59:59.000Z

39

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

3 3 Main Commercial Primary Energy Use of Heating and Cooling Equipment as of 1995 Heating Equipment | Cooling Equipment Packaged Heating Units 25% | Packaged Air Conditioning Units 54% Boilers 21% | Room Air Conditioning 5% Individual Space Heaters 2% | PTAC (2) 3% Furnaces 20% | Centrifugal Chillers 14% Heat Pumps 5% | Reciprocating Chillers 12% District Heat 7% | Rotary Screw Chillers 3% Unit Heater 18% | Absorption Chillers 2% PTHP & WLHP (1) 2% | Heat Pumps 7% 100% | 100% Note(s): Source(s): 1) PTHP = Packaged Terminal Heat Pump, WLHP = Water Loop Heat Pump. 2) PTAC = Packaged Terminal Air Conditioner BTS/A.D. Little, Energy Consumption Characteristics of Commercial Building HVAC Systems, Volume 1: Chillers, Refrigerant Compressors, and Heating Systems, Apr. 2001, Figure 5-5, p. 5-14 for cooling and Figure 5-10, p. 5-18 for heating

40

Transpired Solar Collector at NREL's Waste Handling Facility Uses Solar Energy to Heat Ventilation Air (Fact Sheet) (Revised), Federal Energy Management Program (FEMP)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Highlights Highlights System Size 300 ft 2 transpired solar collector Energy Production About 125 Btu/hr/ft 2 (400 W/m 2 ) of heat delivery under ideal conditions (full sun) Installation Date 1990 Motivation Provide solar-heated ventilation air to offset some of the heating with conventional electric resistance heaters Annual Savings 14,310 kWh (49 million Btu/yr) or about 26% of the energy required to heat the facility's ventilation air System Details Components Black, 300 ft 2 corrugated aluminum transpired solar collector with a porosity of 2%; bypass damper; two-speed 3000 CFM vane axial supply fan; electric duct heater; thermostat controller Storage None Loads 188 million Btu/year (55,038 kWh/year) winter average to heat 1,300 ft 2 Waste Handling Facility

Note: This page contains sample records for the topic "include heating ventilation" 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

Transpired Solar Collector at NREL's Waste Handling Facility Uses Solar Energy to Heat Ventilation Air (Fact Sheet) (Revised), Federal Energy Management Program (FEMP)  

Broader source: Energy.gov (indexed) [DOE]

Highlights Highlights System Size 300 ft 2 transpired solar collector Energy Production About 125 Btu/hr/ft 2 (400 W/m 2 ) of heat delivery under ideal conditions (full sun) Installation Date 1990 Motivation Provide solar-heated ventilation air to offset some of the heating with conventional electric resistance heaters Annual Savings 14,310 kWh (49 million Btu/yr) or about 26% of the energy required to heat the facility's ventilation air System Details Components Black, 300 ft 2 corrugated aluminum transpired solar collector with a porosity of 2%; bypass damper; two-speed 3000 CFM vane axial supply fan; electric duct heater; thermostat controller Storage None Loads 188 million Btu/year (55,038 kWh/year) winter average to heat 1,300 ft 2 Waste Handling Facility

42

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

1 1 Main Residential Heating Equipment as of 1987, 1993, 1997, 2001, and 2005 (Percent of Total Households) Equipment Type 1987 1993 1997 2001 2005 Natural Gas 55% 53% 53% 55% 52% Central Warm-Air Furnace 35% 36% 38% 42% 40% Steam or Hot-Water System 10% 9% 7% 7% 7% Floor/Wall/Pipeless Furnace 6% 4% 4% 3% 2% Room Heater/Other 4% 3% 4% 3% 3% Electricity 20% 26% 29% 29% 30% Central Warm-Air Furnace 8% 10% 11% 12% 14% Heat Pump 5% 8% 10% 10% 8% Built-In Electric Units 6% 7% 7% 6% 5% Other 1% 1% 2% 2% 1% Fuel Oil 12% 11% 9% 7% 7% Steam or Hot-Water System 7% 6% 5% 4% 4% Central Warm-Air Furnace 4% 5% 4% 3% 3% Other 1% 0% 0% 0% 0% Other 13% 11% 9% 8% 10% Total 100% 100% 100% 100% 100% Note(s): Source(s): Other equipment includes wood, LPG, kerosene, other fuels, and none. EIA, A Look at Residential Consumption in 2005, June 2008, Table HC2-4; EIA, A Look at Residential Energy Consumption in 2001, Apr. 2004, 'Table HC3-

43

The term "Heat Stress" refers to a group of heat related illnesses that include heat cramps, heat exhaustion and heat stroke. This safety meeting will review the hazards and symptoms of  

E-Print Network [OSTI]

It's Hot The term "Heat Stress" refers to a group of heat related illnesses that include heat cramps, heat exhaustion and heat stroke. This safety meeting will review the hazards and symptoms of working in the heat. Also, how to reduce risks of working in hot temperatures and respond to danger

Li, X. Rong

44

Reducing Ventilation Energy Demand by Using Air-to-Earth Heat Exchangers  

Science Journals Connector (OSTI)

Air-to-Earth heat exchangers (earth tubes) utilize the fact that the temperature in the ground is relatively constant during the year. By letting the air travel through an air-to-earth heat exchanger before re...

Hans Havtun; Caroline Törnqvist

2013-01-01T23:59:59.000Z

45

Multifamily Individual Heating and Ventilation Systems, Lawrence, Massachusetts (Fact Sheet), Building America Case Study: Efficient Solutions for New and Existing Homes, Building Technologies Office (BTO)  

Broader source: Energy.gov (indexed) [DOE]

Multifamily Individual Heating Multifamily Individual Heating and Ventilation Systems Lawrence, Massachusetts PROJECT INFORMATION Construction: Retrofit Type: Multifamily, affordable Builder: Merrimack Valley Habitat for Humanity (MVHfH) www.merrimackvalleyhabitat.org Size: 840 to 1,170 ft 2 units Price Range: $125,000-$130,000 Date completed: Slated for 2014 Climate Zone: Cold (5A) PERFORMANCE DATA HERS Index Range: 48 to 63 Projected annual energy cost savings: $1,797 Incremental cost of energy efficiency measures: $3,747 Incremental annual mortgage: $346 Annual cash flow: $1,451 Billing data: Not available The conversion of an older Massachusetts building into condominiums illustrates a safe, durable, and cost-effective solution for heating and ventilation systems that can potentially benefit millions of multifamily buildings. Merrimack Valley

46

Optimization of the Fin Heat Pipe for Ventilating and Air Conditioning with a Genetic Algorithm  

E-Print Network [OSTI]

conservation, and it is urgent. At the same time, the energy consumption about air-conditioning of buildings continues to increase and the new wind energy accounts for 4%~12% of the buildings total energy consumption [1]. A heat recovery system for air...

Qian, J.; Sun, D.; Li, G.

2006-01-01T23:59:59.000Z

47

Corrosion of heat-recovery exchangers in swimming-pool-hall ventilation systems. Research report  

SciTech Connect (OSTI)

The report concludes an investigation of the corrosion resistance of heat-recovery exchangers operating in swimming-pool-hall atmospheres. An interim report was published in August 1981. The trends detected then have been confirmed and it is concluded that exchangers using copper for both tubes and fins have adequate corrosion resistance and can be expected to remain efficient and structurally sound for more than ten years. Aluminium is shown to be unsuitable as a fin material because of its susceptibility to localized dissimilar metal corrosion when in contact with the copper tubes. Some of the steel components in the heat recovery chamber are apt to corrode badly and need to be protected, or else made out of non-corrodible materials. It is also important to filter the incoming air to prevent the exchangers becoming contaminated by airborne detritus.

Bird, T.L.

1985-09-01T23:59:59.000Z

48

Capability of air filters to retain airborne bacteria and molds in heating, ventilating and air-conditioning (HVAC) systems  

Science Journals Connector (OSTI)

The capability of air filters (filterclass: F6, F7) to retain airborne outdoor microorganisms was examined in field experiments in two heating, ventilating and air conditioning (HVAC) systems. At the beginning of the 15-month investigation period, the first filter stages of both HVAC systems were equipped with new unused air filters. The number of airborne bacteria and molds before and behind the filters were determined simultaneously in 14 days-intervals using 6-stage Andersen cascade impactors. Under relatively dry ( 12 °C) outdoor air conditions air filters led to a marked reduction of airborne microorganism concentrations (bacteria by approximately 70 % and molds by > 80 %). However, during long periods of high relative humidity (> 80 % R. H.) a proliferation of bacteria on air filters with subsequent release into the filtered air occured. These microorganisms were mainly smaller than 1.1 ?m therefore being part of the respirable fraction. The results showed furthermore that one possibility to avoid microbial proliferation is to limit the relative humidity in the area of the air filters to 80 % R. H. (mean of 3 days), e. g. by using preheaters in front of air filters in HVAC-systems.

Martin Möritz; Hans Peters; Bettina Nipko; Hennin Rüden

2001-01-01T23:59:59.000Z

49

Proposal for the award of a contract for the design, supply, installation and commissioning of a Heating Ventilation and Air Conditioning (HVAC) system for the HIE-ISOLDE infrastructure  

E-Print Network [OSTI]

Proposal for the award of a contract for the design, supply, installation and commissioning of a Heating Ventilation and Air Conditioning (HVAC) system for the HIE-ISOLDE infrastructure

2012-01-01T23:59:59.000Z

50

Proposal for the award of a contract for the design, supply, installation and commissioning of a Heating, Ventilation and Air-Conditioning (HVAC) system for the computer room of the CERN Control Centre  

E-Print Network [OSTI]

Proposal for the award of a contract for the design, supply, installation and commissioning of a Heating, Ventilation and Air-Conditioning (HVAC) system for the computer room of the CERN Control Centre

2012-01-01T23:59:59.000Z

51

Radiant heating and cooling, displacement ventilation with heat recovery and storm water cooling: An environmentally responsible HVAC system  

SciTech Connect (OSTI)

This paper describes the design, operation, and performance of an HVAC system installed as part of a project to demonstrate energy efficiency and environmental responsibility in commercial buildings. The systems installed in the 2180 m{sup 2} office building provide superior air quality and thermal comfort while requiring only half the electrical energy of conventional systems primarily because of the hydronic heating and cooling system. Gas use for the building is higher than expected because of longer operating hours and poor performance of the boiler/absorption chiller.

Carpenter, S.C.; Kokko, J.P. [Enermodal Engineering Ltd., Kitchener, Ontario (Canada)

1998-12-31T23:59:59.000Z

52

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

5 5 Commercial Equipment Efficiencies Equipment Type Chiller Screw COP(full-load / IPLV) 2.80 / 3.05 2.80 / 3.05 3.02 / 4.45 Scroll COP 2.80 / 3.06 2.96 / 4.40 N.A. Reciprocating COP(full-load / IPLV) 2.80 / 3.05 2.80 / 3.05 3.52 / 4.40 Centrifugal COP(full-load / IPLV) 5.0 / 5.2 6.1 / 6.4 7.3 / 9.0 Gas-Fired Absorption COP 1.0 1.1 N.A. Gas-Fired Engine Driven COP 1.5 1.8 N.A. Rooftop A/C EER 10.1 11.2 13.9 Rooftop Heat Pump EER (cooling) 9.8 11.0 12.0 COP (heating) 3.2 3.3 3.4 Boilers Gas-Fired Combustion Efficiency 77 80 98 Oil-Fired Thermal Efficiency 80 84 98 Electric Thermal Efficiency 98 98 98 Furnace AFUE 77 80 82 Water Heater Gas-Fired Thermal Efficiency 78 80 96 Oil-Fired Thermal Efficiency 79 80 85 Electric Resistance Thermal Efficiency 98 98 98 Gas-Fired Instantaneous Thermal Efficiency 77 84 89 Source(s): Parameter Efficiency

53

Ventilative cooling  

E-Print Network [OSTI]

This thesis evaluates the performance of daytime and nighttime passive ventilation cooling strategies for Beijing, Shanghai and Tokyo. A new simulation method for cross-ventilated wind driven airflow is presented . This ...

Graça, Guilherme Carrilho da, 1972-

1999-01-01T23:59:59.000Z

54

Energy Recovery Ventilator Membrane Efficiency Testing  

E-Print Network [OSTI]

A test setup was designed and built to test energy recovery ventilator membranes. The purpose of this test setup was to measure the heat transfer and water vapor transfer rates through energy recover ventilator membranes and find their effectiveness...

Rees, Jennifer Anne

2013-05-07T23:59:59.000Z

55

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

8 8 Major Residential HVAC Equipment Lifetimes, Ages, and Replacement Picture Equipment Type Central Air Conditioners 8 - 14 11 8 5,354 Heat Pumps 9 - 15 12 8 1,260 Furnaces Electric 10 - 20 15 11 N.A. Gas-Fired 12 - 17 15 11 2,601 Oil-Fired 15 - 19 17 N.A. 149 Gas-Fired Boilers (1) 17 - 24 20 17 204 Note(s): Source(s): Lifetimes based on use by the first owner of the product, and do not necessarily indicate that the product stops working after this period. A replaced unit may be discarded or used elsewhere. 1) 2005 average stock age is for gas- and oil-fired steam and hot water boilers. Appliance Magazine, U.S. Appliance Industry: Market Share, Life Expectancy & Replacement Market, and Saturation Levels, January 2010, p. 10 for service and average lifetimes, and units to be replaced; ASHRAE, 1999 ASHRAE Handbook: HVAC Applications, Table 3, p. 35.3 for boilers service lifetimes; and

56

Analysis and feasibility study of residential integrated heat and energy recovery ventilator with built-in economizer using an excel spreadsheet program  

Science Journals Connector (OSTI)

Abstract Currently, heat recovery ventilator (HRV) and energy recovery ventilator (ERV) are commonly studied. Nevertheless, there is limited information regarding the dual-core approach energy recovery. This paper investigates the feasibility of an integrated HRV and ERV system, namely HERV, with a built-in economizer used in the residential sector to reduce dependency on furnace and air conditioning systems. In order to achieve this goal, an excel-based analysis tool was developed, providing a quick estimate of system performance and comparison with the HRV and ERV that are currently being used in research houses. The potential of integrated heat and energy recovery ventilator was evaluated based on its calculated operating cost ratio (OCR) and its payback period. Results collected for Vancouver and Toronto, corresponding to temperate and continental climate, indicated that the \\{OCRs\\} of the HERV were four times smaller than the ERV's, meaning that the proposed system was cost-efficient. It was also evidenced that the high demand on the economizer resulted in higher energy saving and shorter payback period of the system. In conclusion, the integrated HERV system with a built-in economizer could be a feasible option for both temperate and continental climates.

Junlong Zhang; Alan S. Fung; Sumeet Jhingan

2014-01-01T23:59:59.000Z

57

Ventilation Systems for Cooling | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Ventilation Systems for Cooling Ventilation Systems for Cooling Ventilation Systems for Cooling May 30, 2012 - 6:19pm Addthis Proper ventilation helps you save energy and money. | Photo courtesy of JD Hancock. Proper ventilation helps you save energy and money. | Photo courtesy of JD Hancock. Ventilation is the least expensive and most energy-efficient way to cool buildings. Ventilation works best when combined with methods to avoid heat buildup in your home. In some cases, natural ventilation will suffice for cooling, although it usually needs to be supplemented with spot ventilation, ceiling fans, and window fans. For large homes, homeowners might want to investigate whole house fans. Interior ventilation is ineffective in hot, humid climates where

58

Ventilation Systems for Cooling | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Ventilation Systems for Cooling Ventilation Systems for Cooling Ventilation Systems for Cooling May 30, 2012 - 6:19pm Addthis Proper ventilation helps you save energy and money. | Photo courtesy of JD Hancock. Proper ventilation helps you save energy and money. | Photo courtesy of JD Hancock. Ventilation is the least expensive and most energy-efficient way to cool buildings. Ventilation works best when combined with methods to avoid heat buildup in your home. In some cases, natural ventilation will suffice for cooling, although it usually needs to be supplemented with spot ventilation, ceiling fans, and window fans. For large homes, homeowners might want to investigate whole house fans. Interior ventilation is ineffective in hot, humid climates where

59

Ventilation System Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Ventilation System Basics Ventilation System Basics Ventilation System Basics August 16, 2013 - 1:33pm Addthis Ventilation is the process of moving air into and out of an interior space by natural or mechanical means. Ventilation is necessary for the health and comfort of occupants of all buildings. Ventilation supplies air for occupants to breathe and removes moisture, odors, and indoor pollutants like carbon dioxide. Too little ventilation may result in poor indoor air quality, while too much may cause unnecessarily higher heating and cooling loads. Natural Ventilation Natural ventilation occurs when outdoor air is drawn inside through open windows or doors. Natural ventilation is created by the differences in the distribution of air pressures around a building. Air moves from areas of

60

Ventilation System Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Ventilation System Basics Ventilation System Basics Ventilation System Basics August 16, 2013 - 1:33pm Addthis Ventilation is the process of moving air into and out of an interior space by natural or mechanical means. Ventilation is necessary for the health and comfort of occupants of all buildings. Ventilation supplies air for occupants to breathe and removes moisture, odors, and indoor pollutants like carbon dioxide. Too little ventilation may result in poor indoor air quality, while too much may cause unnecessarily higher heating and cooling loads. Natural Ventilation Natural ventilation occurs when outdoor air is drawn inside through open windows or doors. Natural ventilation is created by the differences in the distribution of air pressures around a building. Air moves from areas of

Note: This page contains sample records for the topic "include heating ventilation" 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

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

2 2 Residential Furnace Efficiencies (Percent of Units Shipped) (1) AFUE Range 1985 AFUE Range 2006 AFUE Range 1985 Below 65% 15% 75% to 88% 64% Below 75% 10% 65% to 71% 44% 88% or More 36% 75% to 80% 56% 71% to 80% 10% Total 100% More Than 80% 35% 80% to 86% 19% Total 100% More than 86% 12% Total 100% Average shipped in 1985 (2): 74% AFUE Average shipped in 1985 (2): 79% AFUE Average shipped in 1995: 84% AFUE Average shipped in 1995: 81% AFUE Best Available in 1981: 85% AFUE Best Available in 1981: 85% AFUE Best Available in 2007: 97% AFUE Best Available in 2007: 95% AFUE Note(s): Source(s): Gas-Fired Oil-Fired 1) Federal appliance standards effective Jan. 1, 1992, require a minimum of 78% AFUE for furnaces. 3) Includes boilers. GAMA's Internet Home Page for 2006 AFUE ranges; GAMA News, Feb. 24, 1987, for 1985 AFUE ranges; LBNL for average shipped AFUE; GAMA,

62

Analysis of the Thermonuclear Instability including Low-Power ICRH Minority Heating in IGNITOR  

E-Print Network [OSTI]

The nonlinear thermal balance equation for classical plasma in a toroidal geometry is analytically and numerically investigated including ICRH power. The determination of the equilibrium temperature and the analysis of the stability of the solution are performed by solving the energy balance equation that includes the transport relations obtained by the kinetic theory. An estimation of the confinement time is also provided. We show that the ICRH heating in the IGNITOR experiment, among other applications, is expected to stabilize the power of the thermonuclear burning by automatic regulation of the RF coupled power. Here a scenario is considered where IGNITOR is led to operate in a slightly sub-critical regime by adding a small fraction of ${}^3He$ to the nominal 50-50 Deuterium-Tritium mixture. The difference between power lost and alpha heating is compensated by additional ICRH heating, which should be able to increase the global plasma temperature via collisions between ${}^3He$ minority and the background...

Cardinali, Alessandro

2014-01-01T23:59:59.000Z

63

The impact of demand-controlled and economizer ventilation strategies on energy use in buildings  

SciTech Connect (OSTI)

The overall objective of this work was to evaluate typical energy requirements associated with alternative ventilation control strategies for constant-air-volume (CAV) systems in commercial buildings. The strategies included different combinations of economizer and demand-controlled ventilation, and energy analyses were performed for four typical building types, eight alternative ventilation systems, and twenty US climates. Only single-zone buildings were considered so that simultaneous heating and cooling did not exist. The energy savings associated with economizer and demand-controlled ventilation strategies were found to be very significant for both heating and cooling. In general, the greatest savings in electrical usage for cooling with the addition of demand-controlled ventilation occur in situations where the opportunities for economizer cooling are less. This is true for warm and humid climates and for buildings that have relatively low internal gains (i.e., low occupant densities). As much as 20% savings in electrical energy for cooling were possible with demand-controlled ventilation. The savings in heating energy associated with demand-controlled ventilation were generally much larger but were strongly dependent upon the building type and occupancy schedule. Significantly greater savings were found for buildings with highly variable occupancy schedules and large internal gains (i.e., restaurants) as compared with office buildings. In some cases, the primary heating energy was virtually eliminated by demand-controlled ventilation as compared with fixed ventilation rates. For both heating and cooling, the savings associated with demand-controlled ventilation are dependent on the fixed minimum ventilation rate of the base case at design conditions.

Brandemuehl, M.J.; Braun, J.E.

1999-07-01T23:59:59.000Z

64

The impact of demand-controlled ventilation on energy use in buildings  

SciTech Connect (OSTI)

The overall objective of this work was to evaluate typical energy requirements associated with alternative ventilation control strategies. The strategies included different combinations of economizer and demand-controlled ventilation controls and energy analyses were performed for a range of typical buildings, systems, and climates. Only single zone buildings were considered, so that simultaneous heating and cooling did not exist. The energy savings associated with economizer and demand-controlled ventilation strategies were found to be very significant for both heating and cooling. In general, the greatest savings in electrical usage for cooling with the addition of demand-controlled ventilation occur in situations where the opportunities for economizer cooling are less. This is true for warm and humid climates, and for buildings that have low relative internal gains (i.e., low occupant densities). As much as 10% savings in electrical energy for cooling were possible with demand-controlled ventilation. The savings in heating energy associated with demand-controlled ventilation were generally much larger, but were strongly dependent upon the occupancy schedule. Significantly greater savings were found for buildings with highly variable occupancy schedules (e.g., stores and restaurants) as compared with office buildings. In some cases, the primary heating energy was reduced by a factor of 10 with demand-controlled ventilation as compared with fixed ventilation rates.

Braun, J.E.; Brandemuehl, M.J.

1999-07-01T23:59:59.000Z

65

US Department of Energys Regulatory Negotiations Convening on Commercial Certification for Heating, Ventilating, Air-Conditioning, and Refrigeration Equipment  

Broader source: Energy.gov (indexed) [DOE]

US Department of Energy's Regulatory Negotiations Convening on US Department of Energy's Regulatory Negotiations Convening on Commercial Certification for Heating, Ventilating, Air-Conditioning, and Refrigeration Equipment Public Information for Convening Interviews I. What are the substantive issues DOE seeks to address? Strategies for grouping various basic models for purposes of certification; Identification of non-efficiency attributes, which do not impact the measured consumption of the equipment as tested by DOE's test procedure; The information that is certified to the Department; The timing of when the certification should be made relative to distribution in commerce; and Alterations to a basic model that would impact the certification.

66

Dehumidification and cooling loads from ventilation air  

SciTech Connect (OSTI)

The importance of controlling humidity in buildings is cause for concern, in part, because of indoor air quality problems associated with excess moisture in air-conditioning systems. But more universally, the need for ventilation air has forced HVAC equipment (originally optimized for high efficiency in removing sensible heat loads) to remove high moisture loads. To assist cooling equipment and meet the challenge of larger ventilation loads, several technologies have succeeded in commercial buildings. Newer technologies such as subcool/reheat and heat pipe reheat show promise. These increase latent capacity of cooling-based systems by reducing their sensible capacity. Also, desiccant wheels have traditionally provided deeper-drying capacity by using thermal energy in place of electrical power to remove the latent load. Regardless of what mix of technologies is best for a particular application, there is a need for a more effective way of thinking about the cooling loads created by ventilation air. It is clear from the literature that all-too-frequently, HVAC systems do not perform well unless the ventilation air loads have been effectively addressed at the original design stage. This article proposes an engineering shorthand, an annual load index for ventilation air. This index will aid in the complex process of improving the ability of HVAC systems to deal efficiently with the amount of fresh air the industry has deemed useful for maintaining comfort in buildings. Examination of typical behavior of weather shows that latent loads usually exceed sensible loads in ventilation air by at least 3:1 and often as much as 8:1. A designer can use the engineering shorthand indexes presented to quickly assess the importance of this fact for a given system design. To size those components after they are selected, the designer can refer to Chapter 24 of the 1997 ASHRAE Handbook--Fundamentals, which includes separate values for peak moisture and peak temperature.

Harriman, L.G. III [Mason-Grant, Portsmouth, NH (United States); Plager, D. [Quantitative Decision Support, Portsmouth, NH (United States); Kosar, D. [Gas Research Inst., Chicago, IL (United States)

1997-11-01T23:59:59.000Z

67

Heating, Ventilating, and Air-Conditioning: Recent Advances in Diagnostics and Controls to Improve Air-Handling System Performance  

SciTech Connect (OSTI)

The performance of air-handling systems in buildings needs to be improved. Many of the deficiencies result from myths and lore and a lack of understanding about the non-linear physical principles embedded in the associated technologies. By incorporating these principles, a few important efforts related to diagnostics and controls have already begun to solve some of the problems. This paper illustrates three novel solutions: one rapidly assesses duct leakage, the second configures ad hoc duct-static-pressure reset strategies, and the third identifies useful intermittent ventilation strategies. By highlighting these efforts, this paper seeks to stimulate new research and technology developments that could further improve air-handling systems.

Wray, Craig; Wray, Craig P.; Sherman, Max H.; Walker, I.S.; Dickerhoff, D.J.; Federspiel, C.C.

2008-02-01T23:59:59.000Z

68

Fluidized bed steam reactor including two horizontal cyclone separators and an integral recycle heat exchanger  

SciTech Connect (OSTI)

A reactor is described comprising: a vessel; a first furnace section disposed in said vessel; a second furnace section disposed in said vessel; means in each of said furnace sections for receiving a combustible fuel for generating heat and combustion gases; a first heat recovery area located adjacent said furnace sections; a second heat recovery area located adjacent said furnace sections; means for passing said combustion gases from said first furnace section to said first heat recovery area; and means for passing said combustion gases from said second furnace section to said second heat recovery area.

Gorzegno, W.P.

1993-06-15T23:59:59.000Z

69

Removal of submicron particles using a carbon fiber ionizer-assisted medium air filter in a heating, ventilation, and air-conditioning (HVAC) system  

Science Journals Connector (OSTI)

Laboratory tests of particle removal were performed with a pair of carbon fiber ionizers installed upstream of a glass fiber air filter. For air flow face velocities of 0.4, 0.6, and 0.8 m/s, the overall particle removal efficiencies of the filter for all submicron particles were 17%, 16%, and 14%, respectively, when the ionizers were not turned on. These values increased to 27%, 23%, and 19%, respectively, when the ionizers were used to generate ions of 6.0 × 109 ions/cm3 in concentration. The carbon fiber ionizers were then installed in front of a glass fiber air filter located in a heating, ventilation, and air-conditioning (HVAC) system. Field tests were performed in a test office room with a total indoor particle concentration of 2.2 × 104 particles/cm3. When the flow rate was 75 cubic meters per hour (CMH), the steady-state values of the total indoor particle concentrations using the glass fiber air filter with and without ionizers decreased to 0.87 × 104 particles/cm3 and 1.15 × 104 particles/cm3, respectively, resulting in a 25% decrease of the ionizer effect. When the operation flow rate was increased to 115 and 150 CMH, the effect of the ionizer decreased to 19% and 17%, respectively. These experimental data match the results calculated using a mass-balance model whose parameters were determined from laboratory tests.

Jae Hong Park; Ki Young Yoon; Jungho Hwang

2011-01-01T23:59:59.000Z

70

Numerical Simulations of Bubble Dynamics and Heat Transfer in Pool Boiling--Including the Effects of Conjugate Conduction, Level of Gravity, and Noncondensable Gas Dissolved in the Liquid  

E-Print Network [OSTI]

Microgravity Fluid Physics and Heat Transfer, 62-71. 47.that included the heat transfer between the fluid and solidflux, only one fluid—water—showed significant heat transfer

Aktinol, Eduardo

2014-01-01T23:59:59.000Z

71

Ventilation | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Ventilation Ventilation Ventilation Controlled ventilation keeps energy-efficient homes healthy and comfortable. Learn more about ventilation. Controlled ventilation keeps energy-efficient homes healthy and comfortable. Learn more about ventilation. When creating an energy-efficient, airtight home through air sealing, it's very important to consider ventilation. Unless properly ventilated, an airtight home can seal in indoor air pollutants. Ventilation also helps control moisture-another important consideration for a healthy, energy-efficient home. Featured Whole-House Ventilation A whole-house ventilation system with dedicated ducting in a new energy-efficient home. | Photo courtesy of ©iStockphoto/brebca. Tight, energy-efficient homes require mechanical -- usually whole-house --

72

Development of a Residential Integrated Ventilation Controller  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Development of a Residential Integrated Ventilation Controller Development of a Residential Integrated Ventilation Controller Title Development of a Residential Integrated Ventilation Controller Publication Type Report LBNL Report Number LBNL-5554E Year of Publication 2012 Authors Walker, Iain S., Max H. Sherman, and Darryl J. Dickerhoff Keywords ashrae standard 62,2, california title 24, residential ventilation, ventilation controller Abstract The goal of this study was to develop a Residential Integrated Ventilation Controller (RIVEC) to reduce the energy impact of required mechanical ventilation by 20%, maintain or improve indoor air quality and provide demand response benefits. This represents potential energy savings of about 140 GWh of electricity and 83 million therms of natural gas as well as proportional peak savings in California. The RIVEC controller is intended to meet the 2008 Title 24 requirements for residential ventilation as well as taking into account the issues of outdoor conditions, other ventilation devices (including economizers), peak demand concerns and occupant preferences. The controller is designed to manage all the residential ventilation systems that are currently available. A key innovation in this controller is the ability to implement the concept of efficacy and intermittent ventilation which allows time shifting of ventilation. Using this approach ventilation can be shifted away from times of high cost or high outdoor pollution towards times when it is cheaper and more effective. Simulations, based on the ones used to develop the new residential ventilation requirements for the California Buildings Energy code, were used to further define the specific criteria and strategies needed for the controller. These simulations provide estimates of the energy, peak power and contaminant improvement possible for different California climates for the various ventilation systems. Results from a field test of the prototype controller corroborate the predicted performance.

73

Building America Case Study: Selecting Ventilation Systems for...  

Energy Savers [EERE]

requirements must be met? * What is the scope of the renovation project? * What heating, air conditioning, and ventilation systems are currently in the home? * What type of...

74

The International Journal of Ventilation  

E-Print Network [OSTI]

in Buildings: Harrington C and Modera M 345 Estimates of Uncertainty in Multi-Zone Air Leakage Measurements. Introduction Heating, cooling and ventilation can account for 50 percent of total building energy use flow rate. Over the past 15 years, the subject of duct leakage in buildings other than single-family

California at Davis, University of

75

Ventilation Industrielle de Bretagne VIB | Open Energy Information  

Open Energy Info (EERE)

Ventilation Industrielle de Bretagne VIB Ventilation Industrielle de Bretagne VIB Jump to: navigation, search Name Ventilation Industrielle de Bretagne (VIB) Place Ploudalmezeau, France Zip 29839 Sector Geothermal energy, Solar Product Ploudalmezeau-based company producing and marketing energy efficient and ventilation products including air source heat pumps, geothermal water source heat pumps, efficient air filtration systems and solar products. Coordinates 48.540325°, -4.657904° 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":48.540325,"lon":-4.657904,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

76

Ventilation, temperature, and HVAC characteristics in small and medium  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ventilation, temperature, and HVAC characteristics in small and medium Ventilation, temperature, and HVAC characteristics in small and medium commercial buildings in California Title Ventilation, temperature, and HVAC characteristics in small and medium commercial buildings in California Publication Type Journal Article Refereed Designation Refereed Year of Publication 2012 Authors Bennett, Deborah H., William J. Fisk, Michael G. Apte, X. Wu, Amber L. Trout, David Faulkner, and Douglas P. Sullivan Journal Indoor Air Volume 22 Issue 4 Pagination 309-20 Abstract This field study of 37 small and medium commercial buildings throughout California obtained information on ventilation rate, temperature, and heating, ventilating, and air-conditioning (HVAC) system characteristics. The study included seven retail establishments; five restaurants; eight offices; two each of gas stations, hair salons, healthcare facilities, grocery stores, dental offices, and fitness centers; and five other buildings. Fourteen (38%) of the buildings either could not or did not provide outdoor air through the HVAC system. The air exchange rate averaged 1.6 (s.d. = 1.7) exchanges per hour and was similar between buildings with and without outdoor air supplied through the HVAC system, indicating that some buildings have significant leakage or ventilation through open windows and doors. Not all buildings had sufficient air exchange to meet ASHRAE 62.1 Standards, including buildings used for fitness centers, hair salons, offices, and retail establishments. The majority of the time, buildings were within the ASHRAE temperature comfort range. Offices were frequently overcooled in the summer. All of the buildings had filters, but over half the buildings had a filter with a minimum efficiency reporting value rating of 4 or lower, which are not very effective for removing fine particles. PRACTICAL IMPLICATIONS: Most U.S. commercial buildings (96%) are small- to medium-sized, using nearly 18% of the country's energy, and sheltering a large population daily. Little is known about the ventilation systems in these buildings. This study found a wide variety of ventilation conditions, with many buildings failing to meet relevant ventilation standards. Regulators may want to consider implementing more complete building inspections at commissioning and point of sale.

77

NREL: Learning - Solar Process Heat  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Process Heat Process Heat Photo of part of one side of a warehouse wall, where a perforated metal exterior skin is spaced about a foot out from the main building wall to form part of the transpired solar collector system. A transpired collector is installed at a FedEx facility in Denver, Colorado. Commercial and industrial buildings may use the same solar technologies-photovoltaics, passive heating, daylighting, and water heating-that are used for residential buildings. These nonresidential buildings can also use solar energy technologies that would be impractical for a home. These technologies include ventilation air preheating, solar process heating, and solar cooling. Space Heating Many large buildings need ventilated air to maintain indoor air quality. In cold climates, heating this air can use large amounts of energy. But a

78

Solar ventilation and tempering  

Science Journals Connector (OSTI)

The paper presents basic information about solar panels designed realized and used for solar ventilation of rooms. Used method of numerical flow simulation gives good overview about warming and flowing of the air in several kinds of realized panels (window facade chimney). Yearlong measurements give a good base for calculations of economic return of invested capital. The operation of the system in transient period (spring autumn) prolongs the period without classical heating of the room or building in winter the classical heating is supported. In the summer period the system furnished with chimney can exhaust inner warm air together with necessary cooling of the system by gravity circulation only. System needs not any invoiced energy source; it is supplied entirely by solar energy. Large building systems are supported by classical electric fan respectively.

2014-01-01T23:59:59.000Z

79

Solar heating and hot water system installed at the Senior Citizen Center, Huntsville, Alabama. [Includes engineering drawings  

SciTech Connect (OSTI)

Information is provided on the solar energy system installed at the Huntsville Senior Citizen Center. The solar space heating and hot water facility and the project involved in its construction are described in considerable detail and detailed drawings of the complete system and discussions of the planning, the hardware, recommendations, and other pertinent information are included. The facility was designed to provide 85 percent of the hot water and 85 percent of the space heating requirements. Two important factors concerning this project for commercial demonstration are the successful use of silicon oil as a heat transfer fluid and the architecturally aesthetic impact of a large solar energy system as a visual centerpoint. There is no overheat or freeze protection due to the characteristics of the silicon oil and the design of the system. Construction proceeded on schedule with no cost overruns. It is designed to be relatively free of scheduled maintenance, and has experienced practically no problems.

Not Available

1980-02-01T23:59:59.000Z

80

Improving Ventilation and Saving Energy: Laboratory Study in a Modular  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Improving Ventilation and Saving Energy: Laboratory Study in a Modular Improving Ventilation and Saving Energy: Laboratory Study in a Modular Classroom Test Bed Title Improving Ventilation and Saving Energy: Laboratory Study in a Modular Classroom Test Bed Publication Type Report Year of Publication 2005 Authors Apte, Michael G., Ian S. Buchanan, David Faulkner, William J. Fisk, Chi-Ming Lai, Michael Spears, and Douglas P. Sullivan Publisher Lawrence Berkeley National Laboratory Abstract The primary goals of this research effort were to develop, evaluate, and demonstrate a practical HVAC system for classrooms that consistently provides classrooms with the quantity of ventilation in current minimum standards, while saving energy, and reducing HVAC-related noise levels. This research was motivated by several factors, including the public benefits of energy efficiency, evidence that many classrooms are under-ventilated, and public concerns about indoor environmental quality in classrooms. This project involved the installation and verification of the performance of an Improved Heat Pump Air Conditioning (IHPAC) system, and its comparison, a standard HVAC system having an efficiency of 10 SEER. The project included the verification of the physical characteristics suitable for direct replacement of existing 10 SEER systems, quantitative demonstration of improved energy efficiency, reduced acoustic noise levels, quantitative demonstration of improved ventilation control, and verification that the system would meet temperature control demands necessary for the thermal comfort of the occupants. Results showed that the IHPAC met these goals. The IHPAC was found to be a direct bolt-on replacement for the 10 SEER system. Calculated energy efficiency improvements based on many days of classroom cooling or heating showed that the IHPAC system is about 44% more efficient during cooling and 38% more efficient during heating than the 10 SEER system. Noise reduction was dramatic, with measured A-weighed sound level for fan only operation conditions of 34.3 dB(A), a reduction of 19 dB(A) compared to the 10 SEER system. Similarly, the IHPAC stage-1 and stage-2 compressor plus fan sound levels were 40.8 dB(A) and 42.7 dB(A), reductions of 14 and 13 dB(A), respectively. Thus, the IHPAC is 20 to 35 times quieter than the 10 SEER systems depending upon the operation mode. The IHPAC system met the ventilation requirements and was able to provide consistent outside air supply throughout the study. Indoor CO2 levels with simulated occupancy were maintained below 1000 ppm. Finally temperature settings were met and controlled accurately. The goals of the laboratory testing phase were met and this system is ready for further study in a field test of occupied classrooms

Note: This page contains sample records for the topic "include heating ventilation" 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

DEMAND CONTROLLED VENTILATION AND CLASSROOM VENTILATION  

E-Print Network [OSTI]

columns indicate the energy and cost savings for demandand class size. (The energy costs of classroom ventilationTotal Increase in Energy Costs ($) Increased State Revenue

Fisk, William J.

2014-01-01T23:59:59.000Z

82

Federal Energy Management Program: New and Underutilized Heating,  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Heating, Ventilation, and Air Conditioning Technologies to Heating, Ventilation, and Air Conditioning Technologies to someone by E-mail Share Federal Energy Management Program: New and Underutilized Heating, Ventilation, and Air Conditioning Technologies on Facebook Tweet about Federal Energy Management Program: New and Underutilized Heating, Ventilation, and Air Conditioning Technologies on Twitter Bookmark Federal Energy Management Program: New and Underutilized Heating, Ventilation, and Air Conditioning Technologies on Google Bookmark Federal Energy Management Program: New and Underutilized Heating, Ventilation, and Air Conditioning Technologies on Delicious Rank Federal Energy Management Program: New and Underutilized Heating, Ventilation, and Air Conditioning Technologies on Digg Find More places to share Federal Energy Management Program: New and

83

Reducing Mortality from Terrorist Releases of Chemical and Biological Agents: I. Filtration for Ventilation Systems in Commercial Building  

E-Print Network [OSTI]

R.J. : Effect of ventilation rate in a healthy building.IAQ '91: Healthy Buildings, American Society of Heating,

Thatcher, Tracy L.

2011-01-01T23:59:59.000Z

84

Ventilation | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Ventilation Ventilation Ventilation May 7, 2012 - 2:49pm Addthis This ventilation system in a tight, energy-efficient home ensures good indoor air quality. | Photo courtesy of ©iStockphoto.com/brebca. This ventilation system in a tight, energy-efficient home ensures good indoor air quality. | Photo courtesy of ©iStockphoto.com/brebca. What does this mean for me? After you've reduced air leakage in your home, adequate ventilation is critical for health and comfort. Depending on your climate, there are a number of strategies to ventilate your home. Ventilation is very important in an energy-efficient home. Air sealing techniques can reduce air leakage to the point that contaminants with known health effects such as formaldehyde, volatile organic compounds, and radon

85

Ventilation | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Ventilation Ventilation Ventilation May 7, 2012 - 2:49pm Addthis This ventilation system in a tight, energy-efficient home ensures good indoor air quality. | Photo courtesy of ©iStockphoto.com/brebca. This ventilation system in a tight, energy-efficient home ensures good indoor air quality. | Photo courtesy of ©iStockphoto.com/brebca. What does this mean for me? After you've reduced air leakage in your home, adequate ventilation is critical for health and comfort. Depending on your climate, there are a number of strategies to ventilate your home. Ventilation is very important in an energy-efficient home. Air sealing techniques can reduce air leakage to the point that contaminants with known health effects such as formaldehyde, volatile organic compounds, and radon

86

A 2D finite element with through the thickness parabolic temperature distribution for heat transfer simulations including welding  

Science Journals Connector (OSTI)

Abstract The arc welding process involves thermal cycles that cause the appearance of undesirable residual stresses. The determination of this thermal cycle is the first step to a thermomechanical analysis that allows the numerical calculation of residual stresses. This study describes the formulation of a 2D finite element with through the thickness parabolic temperature distribution, including an element estabilization procedure. The 2D element described in this paper can be used to perform thermal analysis more economically than 3D elements, especially in plates, because the number of degrees of freedom through the thickness will always be three. A numerical model of a tungsten arc welding (GTAW) setup was made based on published experimental results. Size and distribution of the heat source input, thermal properties dependent on temperature, surface heat losses by convection and latent heat during phase change were considered. In parallel the same setup was modeled using ANSYS software with 3D elements (SOLID70) to compare against 2D numerical results. The results obtained by 2D model, 3D model and experimental data showed good agreement.

Darlesson Alves do Carmo; Alfredo Rocha de Faria

2015-01-01T23:59:59.000Z

87

Design of industrial ventilation systems  

SciTech Connect (OSTI)

This latest edition has a title change to reflect an expansion to cover the interrelated areas of general exhaust ventilation and makeup air supply. More coverage is also given the need for energy conservation and for the physical isolation of the workspace from major contaminant generation zones. Excellent and generous illustrative matter is included. Contents, abridged are as follows: flow of fluids; air flow through hoods; pipe resistance; piping design; centrifugal exhaust fans; axial-flow fans; monitoring industrial ventilization systems; isolation; and energy conservation.

Alden, J.L.; Kane, J.M.

1982-01-01T23:59:59.000Z

88

Demand Controlled Ventilation and Classroom Ventilation  

E-Print Network [OSTI]

columns indicate the energy and cost savings for  demand class size.   (The energy costs  of classroom ventilation Total Increase in Energy Costs ($) Increased State Revenue

Fisk, William J.

2014-01-01T23:59:59.000Z

89

Building Science - Ventilation  

Broader source: Energy.gov (indexed) [DOE]

Ventilation Ventilation Joseph Lstiburek, Ph.D., P.Eng, ASHRAE Fellow www.buildingscience.com Build Tight - Ventilate Right Building Science Corporation Joseph Lstiburek 2 Build Tight - Ventilate Right How Tight? What's Right? Building Science Corporation Joseph Lstiburek 3 Air Barrier Metrics Material 0.02 l/(s-m2) @ 75 Pa Assembly 0.20 l/(s-m2) @ 75 Pa Enclosure 2.00 l/(s-m2) @ 75 Pa 0.35 cfm/ft2 @ 50 Pa 0.25 cfm/ft2 @ 50 Pa 0.15 cfm/ft2 @ 50 Pa Building Science Corporation Joseph Lstiburek 4 Getting rid of big holes 3 ach@50 Getting rid of smaller holes 1.5 ach@50 Getting German 0.6 ach@50 Building Science Corporation Joseph Lstiburek 5 Best As Tight as Possible - with - Balanced Ventilation Energy Recovery Distribution Source Control - Spot exhaust ventilation Filtration

90

Carbon-dioxide-controlled ventilation study  

SciTech Connect (OSTI)

The In-House Energy Management (IHEM) Program has been established by the U.S. Department of Energy to provide funds to federal laboratories to conduct research on energy-efficient technology. The Energy Sciences Department of Pacific Northwest Laboratory (PNL) was tasked by IHEM to research the energy savings potential associated with reducing outdoor-air ventilation of buildings. By monitoring carbon dioxide (CO{sub 2}) levels in a building, outdoor air provided by the heating, ventilating, and air-conditioning (HVAC) system can be reduced to the percentage required to maintain satisfactory CO{sub 2} levels rather than ventilating with a higher outdoor-air percentage based on an arbitrary minimum outdoor-air setting. During summer months, warm outdoor air brought into a building for ventilation must be cooled to meet the appropriate cooling supply-air temperature, and during winter months, cold outdoor air must be heated. By minimizing the amount of hot or cold outdoor air brought into the HVAC system, the supply air requires less cooling or heating, saving energy and money. Additionally, the CO{sub 2} levels in a building can be monitored to ensure that adequate outdoor air is supplied to a building to maintain air quality levels. The two main considerations prior to implementing CO{sub 2}-based ventilation control are its impact on energy consumption and the adequacy of indoor air quality (IAQ) and occupant comfort. To address these considerations, six portable CO{sub 2} monitors were placed in several Hanford Site buildings to estimate the adequacy of office/workspace ventilation. The monitors assessed the potential for reducing the flow of outdoor-air to the buildings. A candidate building was also identified to monitor various ventilation control strategies for use in developing a plan for implementing and assessing energy savings.

McMordie, K.L.; Carroll, D.M.

1994-05-01T23:59:59.000Z

91

Radionuclide Releases During Normal Operations for Ventilated Tanks  

SciTech Connect (OSTI)

This calculation estimates the design emissions of radionuclides from Ventilated Tanks used by various facilities. The calculation includes emissions due to processing and storage of radionuclide material.

Blunt, B.

2001-09-24T23:59:59.000Z

92

Advanced Controls for Residential Whole-House Ventilation Systems  

SciTech Connect (OSTI)

Whole-house ventilation systems are becoming commonplace in new construction, remodeling/renovation, and weatherization projects, driven by combinations of specific requirements for indoor air quality (IAQ), health and compliance with standards, such as ASHRAE 62.2. Ventilation systems incur an energy penalty on the home via fan power used to drive the airflow, and the additional space-conditioning load associated with heating or cooling the ventilation air. Finding a balance between IAQ and energy use is important if homes are to be adequately ventilated while not increasing the energy burden. This study used computer simulations to examine RIVEC the Residential Integrated Ventilation Controller - a prototype ventilation controller that aims to deliver whole-house ventilation rates that comply with ventilation standards, for the minimum use of energy. Four different whole-house ventilation systems were simulated, both with and without RIVEC, so that the energy and IAQ results could be compared. Simulations were conducted for 13 US climate zones, three house designs, and three envelope leakage values. The results showed that the RIVEC controller could typically return ventilation energy savings greater than 40percent without compromising long-term chronic or short-term acute exposures to relevant indoor contaminants. Critical and average peak power loads were also reduced as a consequence of using RIVEC.

Turner, William; Walker, Iain; Sherman, Max

2014-08-01T23:59:59.000Z

93

Why We Ventilate  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Why We Ventilate Why We Ventilate Title Why We Ventilate Publication Type Conference Paper LBNL Report Number LBNL-5093E Year of Publication 2011 Authors Logue, Jennifer M., Phillip N. Price, Max H. Sherman, and Brett C. Singer Conference Name Proceedings of the 2011 32nd AIVC Conference and 1st Tightvent Conference Date Published October 2011 Conference Location Brussels, Belgium Keywords indoor environment department, resave, ventilation and air cleaning Abstract It is widely accepted that ventilation is critical for providing good indoor air quality (IAQ) in homes. However, the definition of "good" IAQ, and the most effective, energy efficient methods for delivering it are still matters of research and debate. This paper presents the results of work done at the Lawrence Berkeley National Lab to identify the air pollutants that drive the need for ventilation as part of a larger effort to develop a health-based ventilation standard. First, we present results of a hazard analysis that identified the pollutants that most commonly reach concentrations in homes that exceed health-based standards or guidelines for chronic or acute exposures. Second, we present results of an impact assessment that identified the air pollutants that cause the most harm to the U.S. population from chronic inhalation in residences. Lastly, we describe the implications of our findings for developing effective ventilation standards.

94

Ventilation of Electrical Substations  

Science Journals Connector (OSTI)

... THE type of construction used for substations is generally governed by requirements, for example, fire and air-raid precautions, which ... Electrical Engineers, F. Favell and E. W. Connon record their experiences in overcoming substation ventilation problems in particular cases. Adequate and suitably planned ventilation will maintain ...

1943-05-01T23:59:59.000Z

95

Whole Building Ventilation Systems  

Broader source: Energy.gov (indexed) [DOE]

Whole-Building Whole-Building Ventilation Systems for Existing Homes © 2011 Steven Winter Associates, Inc. All rights reserved. © 2011 Steven Winter Associates, Inc. All rights reserved. Home Performance / Weatherization  Addressing ventilation is the exception  Max tightness, e.g. BPI's "Building Airflow Standard" (BAS)  References ASHRAE 62-89  BAS = Max [0.35 ACH, 15 CFM/person], CFM50 eq.  If BD tests show natural infiltration below BAS...  Ventilation must be recommended or installed.  SO DON'T AIR SEAL TO MUCH! © 2011 Steven Winter Associates, Inc. All rights reserved. © 2011 Steven Winter Associates, Inc. All rights reserved. Ventilation Requirements Ventilation systems for existing homes that are:

96

Multifamily Ventilation - Best Practice?  

Broader source: Energy.gov (indexed) [DOE]

Multifamily Ventilation - Best Practice? Multifamily Ventilation - Best Practice? Dianne Griffiths April 29, 2013 Presentation Outline * Basic Objectives * Exhaust Systems * Make-up Air Systems Two Primary Ventilation Objectives 1) Providing Fresh Air - Whole-House 2) Removing Pollutants - Local Exhaust Our goal is to find the simplest solution that satisfies both objectives while minimizing cost and energy impacts. Common Solution: Align local exhaust with fresh air requirements (Ex: 25 Bath + 25 Kitchen) Exhaust-Driven Fresh Air Design * Exhaust slightly depressurizes the units * Outside air enters through leaks, cracks, or planned inlets * Widely used in the North Multifamily Ventilation Best Practice * Step 1: Understand ventilation requirements * Step 2: Select the simplest design that can

97

Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements- Sean Maxwell  

Broader source: Energy.gov [DOE]

This presentation is included in the Building America webinar, Multifamily Ventilation Strategies and Compartmentalization Requirements, on September 24, 2014.

98

Economic Passive Solar Warm-Air Heating and Ventilating System Combined with Short Term Storage within Building Components for Residential Houses  

Science Journals Connector (OSTI)

Warm-air heating systems are very suitable for the exploitation of solar energy. A relatively low temperature level combined ... used for transportation and distribution equipment or as storage elements.

K. Bertsch; E. Boy; K.-D. Schall

1984-01-01T23:59:59.000Z

99

Heat Requirements of Buildings  

Science Journals Connector (OSTI)

... and Ventilating Engineers in a publication entitled “Recommendations for the Computation of Heat Requirements for Buildings” (Pp. iii+41. Is. 9d.) This comprises a section of the ... parts. That on temperature-rise and rates of change gives the recommended values applicable to buildings ranging alphabetically from aircraft sheds to warehouses. The design of heating and ventilating installations ...

1942-02-28T23:59:59.000Z

100

Natural Ventilation | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Natural Ventilation Natural Ventilation Natural Ventilation May 30, 2012 - 7:56pm Addthis Opening a window is a simple natural ventilation strategy. | Credit: ©iStockphoto/Simotion Opening a window is a simple natural ventilation strategy. | Credit: ©iStockphoto/Simotion What does this mean for me? If you live in a part of the country with cool nights and breezes, you may be able to cool your house with natural ventilation. If you're building a new home, design it to take advantage of natural ventilation. Natural ventilation relies on the wind and the "chimney effect" to keep a home cool. Natural ventilation works best in climates with cool nights and regular breezes. The wind will naturally ventilate your home by entering or leaving windows, depending on their orientation to the wind. When wind blows against your

Note: This page contains sample records for the topic "include heating ventilation" 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

Residential Ventilation & Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 5 Residential Ventilation & Energy Figure 1: Annual Average Ventilation Costs of the Current U.S. Single-Family Housing Stock ($/year/house). Infiltration and ventilation in dwellings is conventionally believed to account for one-third to one-half of space conditioning energy. Unfortunately, there is not a great deal of measurement data or analysis to substantiate this assumption. As energy conservation improvements to the thermal envelope continue, the fraction of energy consumed by the conditioning of air may increase. Air-tightening programs, while decreasing energy requirements, have the tendency to decrease ventilation and its associated energy penalty at the possible expense of adequate indoor air quality. Therefore, more energy may be spent on conditioning air.

102

FEMP-FS--Solar Ventilation Preheating  

Broader source: Energy.gov (indexed) [DOE]

Installing a "solar wall" to heat air before it enters a Installing a "solar wall" to heat air before it enters a building, called solar ventilation preheating, is one of the most efficient ways of reducing energy costs using clean and renewable energy. The system works by heating outside air with a south-facing solar collector-a dark-colored wall made of sheet metal and perforated with tiny holes. Outdoor air is drawn through the holes and heated as it absorbs the wall's warmth. The warm air rises in the space between the solar wall and the building wall and is moved into the air-duct system, usually by means of a fan, to heat the building. Any additional heating needed at night or on cloudy days is supplied by the build- ing's conventional heating system. During summer months, intake air bypasses the solar collector,

103

Domestic Heating and Thermal Insulation  

Science Journals Connector (OSTI)

... DIGEST 133 of the Building Research Station, entitled "Domestic Heating and Thermal Insulation" (Pp. 7. London : H.M. Stationery Office, 1960. 4insulation, the standard of heating, the ventilation-rate and the length of the heating season ...

1960-09-17T23:59:59.000Z

104

Engineering Analysis of Intermediate Loop and Process Heat Exchanger Requirements to Include Configuration Analysis and Materials Needs  

SciTech Connect (OSTI)

The need to locate advanced hydrogen production facilities a finite distance away from a nuclear power source necessitates the need for an intermediate heat transport loop (IHTL). This IHTL must not only efficiently transport energy over distances up to 500 meters but must also be capable of operating at high temperatures (>850oC) for many years. High temperature, long term operation raises concerns of material strength, creep resistance and general material stability (corrosion resistance). IHTL design is currently in the initial stages. Many questions remain to be answered before intelligent design can begin. The report begins to look at some of the issues surrounding the main components of an IHTL. Specifically, a stress analysis of a compact heat exchanger design under expected operating conditions is reported. Also the results of a thermal analysis performed on two ITHL pipe configurations for different heat transport fluids are presented. The configurations consist of separate hot supply and cold return legs as well as annular design in which the hot fluid is carried in an inner pipe and the cold return fluids travels in the opposite direction in the annular space around the hot pipe. The effects of insulation configurations on pipe configuration performance are also reported. Finally, a simple analysis of two different process heat exchanger designs, one a tube in shell type and the other a compact or microchannel reactor are evaluated in light of catalyst requirements. Important insights into the critical areas of research and development are gained from these analyses, guiding the direction of future areas of research.

T.M. Lillo; R.L. Williamson; T.R. Reed; C.B. Davis; D.M. Ginosar

2005-09-01T23:59:59.000Z

105

Design Feature 7: Continuous Preclosure Ventilation  

SciTech Connect (OSTI)

This design feature (DF) is intended to evaluate the effects of continuous ventilation in the emplacement drifts during preclosure and how the effects, if any, compare to the Viability Assessment (VA) reference design for postclosure long term performance. This DF will be evaluated against a set of criteria provided by the License Application Design Selection (LADS) group. The VA reference design included a continuous ventilation airflow quantity of 0.1 m{sup 3}/s in the emplacement drifts in the design of the repository subsurface facilities. The effects of this continuous ventilation during the preclosure was considered to have a negligible effect on postclosure performance and therefore is not included during postclosure in the assessment of the long term performance. This DF discusses the effects of continuous ventilation on the emplacement drift environment and surrounding rock conditions during preclosure for three increased airflow quantities. The three cases of continuous ventilation systems are: System A, 1.0 m{sup 3}/s (Section 8), System B, 5.0 m{sup 3}/s (Section 9), and System C, 10.0 m{sup 3}/s (Section 10) in each emplacement drift split. An emplacement drift split is half total length of emplacement drift going from the east or west main to the exhaust main. The difference in each system is the quantity of airflow in the emplacement drifts.

A.T. Watkins

1999-06-22T23:59:59.000Z

106

Effect of Ventilation Strategies on Residential Ozone Levels  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Effect of Ventilation Strategies on Residential Ozone Levels Effect of Ventilation Strategies on Residential Ozone Levels Title Effect of Ventilation Strategies on Residential Ozone Levels Publication Type Journal Article LBNL Report Number LBNL-5889E Year of Publication 2012 Authors Walker, Iain S., and Max H. Sherman Journal Building and Environment Volume 59 Start Page 456 Pagination 456-465 Date Published 01/2013 Keywords ashrae standard 62,2, filtration, infiltration, mechanical ventilation, ozone, simulation Abstract Elevated outdoor ozone levels are associated with adverse health effects. Because people spend the vast majority of their time indoors, reduction in indoor levels of ozone of outdoor origin would lower population exposures and might also lead to a reduction in ozone---associated adverse health effects. In most buildings, indoor ozone levels are diminished with respect to outdoor levels to an extent that depends on surface reactions and on the degree to which ozone penetrates the building envelope. Ozone enters buildings from outdoors together with the airflows that are driven by natural and mechanical means, including deliberate ventilation used to reduce concentrations of indoor---generated pollutants. When assessing the effect of deliberate ventilation on occupant health one should consider not only the positive effects on removing pollutants of indoor origin but also the possibility that enhanced ventilation might increase indoor levels of pollutants originating outdoors. This study considers how changes in residential ventilation that are designed to comply with ASHRAE Standard 62.2 might influence indoor levels of ozone. Simulation results show that the building envelope can contribute significantly to filtration of ozone. Consequently, the use of exhaust ventilation systems is predicted to produce lower indoor ozone concentrations than would occur with balanced ventilation systems operating at the same air---exchange rate. We also investigated a strategy for reducing exposure to ozone that would deliberately reduce ventilation rates during times of high outdoor ozone concentration while still meeting daily average ventilation requirements.

107

Design of double skin (envelope) as a solar chimney: adapting natural ventilation in double envelope for mild or warm climates.  

E-Print Network [OSTI]

??In United States, space heating, space cooling and ventilation of buildings consume 33% of the annual building energy consumption and 15% of the total annual… (more)

Wang, Lutao

2010-01-01T23:59:59.000Z

108

Natural ventilation generates building form  

E-Print Network [OSTI]

Natural ventilation is an efficient design strategy for thermal comfort in hot and humid climates. The building forms can generate different pressures and temperatures to induce natural ventilation. This thesis develops a ...

Chen, Shaw-Bing

1996-01-01T23:59:59.000Z

109

Measuring Residential Ventilation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Measuring Residential Ventilation Measuring Residential Ventilation System Airflows: Part 2 - Field Evaluation of Airflow Meter Devices and System Flow Verification J. Chris Stratton, Iain S. Walker, Craig P. Wray Environmental Energy Technologies Division October 2012 LBNL-5982E 2 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 California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any

110

E-Print Network 3.0 - absorption-sorption heat pumps Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Corporation Auxiliary - Heat pump water heater 50... -gal tank, electric auxiliary heating Multiple operating modes: heat pump, hybrid and standard... and Ventilation Systems...

111

E-Print Network 3.0 - absorption-type heat pumps Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Corporation Auxiliary - Heat pump water heater 50... -gal tank, electric auxiliary heating Multiple operating modes: heat pump, hybrid and standard... and Ventilation Systems...

112

Measure Guideline: Selecting Ventilation Systems for Existing Homes  

SciTech Connect (OSTI)

This document addresses adding -or improving - mechanical ventilation systems to existing homes. The purpose of ventilation is to remove contaminants from homes, and this report discusses where, when, and how much ventilation is appropriate in a home, including some discussion of relevant codes and standards. Advantages, disadvantages, and approximate costs of various system types are presented along with general guidelines for implementing the systems in homes. CARB intends for this document to be useful to decision makers and contractors implementing ventilation systems in homes. Choosing the "best" system is not always straightforward; selecting a system involves balancing performance, efficiency, cost, required maintenance, and several other factors. It is the intent of this document to assist contractors in making more informed decisions when selecting systems. Ventilation is an integral part of a high-performance home. With more air-sealed envelopes, a mechanical means of removing contaminants is critical for indoor environmental quality and building durability.

Aldrich, R.

2014-02-01T23:59:59.000Z

113

Ventilation Air Preconditioning Systems  

E-Print Network [OSTI]

Ventilation Air Preconditioning Systems Mukesh Khattar Michael J. Brandemuehl Manager, Space Conditioning and Refrigeration Associate Professor Customer Systems Group Joint Center for Energy Management Electric Power Research Institute Campus... costs, the small, modular nature of the system allows great flexibility for fitting into retrofit geometries and saves space in new construction. Moreover, a single chiller can serve multiple air-handling units-in stark contrast to packaged...

Khattar, M.; Brandemuehl, M. J.

1996-01-01T23:59:59.000Z

114

SURFACE CIRCULATION AND VENTILATION Lynne D. Talley(1)  

E-Print Network [OSTI]

of autonomous subsurface profiling to include oxygen and turbulence profiling, and implementation of local of subsurface circulation in the wind-driven gyres (section 2), and (2) ventilation/upwelling processes

Talley, Lynne D.

115

The Improvement of Natural Ventilation in an Industrial Workshop by Solar Chimney  

Science Journals Connector (OSTI)

This paper presents a numerical simulation based on computational fluid dynamics (CFD) method on the enhancement of natural ventilation in an industrial workshop with heat source induced by solar chimney (SC). Four types of SC were designed to attach ... Keywords: natural ventilation, solar chimney, industrtial workshop, numerical simulation, thermal comfort

Yu-feng Xue; Ya-xin Su

2011-02-01T23:59:59.000Z

116

Greenhouse Ventilation1 Dennis E . Buffington, Ray A. Bucklin, Richard W. Henley and Dennis B. McConnell2  

E-Print Network [OSTI]

high temperatures during the summer caused by the influx of solar radiation, to maintain relative VENTILATION A heating system with adequate capacity is needed in the winter to maintain environmental of the winter, when the heating system is running at full capacity, some ventilation is still required

Watson, Craig A.

117

Literature Review of Displacement Ventilation  

E-Print Network [OSTI]

) and Nielsen et al. (1988) showed the impact of supply diffusers whereby increasing the entrainment of room air can decrease the temperature gradient in the occupied zone. #0;? Two important parameters to evaluate the performance of displacement ventilation... of Ventilated Rooms, Oslo, Norway. Nielsen, P.V., Hoff, L., Pedersen, L.G. 1988. Displacement Ventilation by Different Types of Diffusers. Proceedings of the 9 th AIVC Conference, Warwick. Niu, J. 1994. Modeling of Cooled-Ceiling Air-Conditioning Systems Ph...

Cho, S.; Im, P.; Haberl, J. S.

118

Numerical Simulations of Bubble Dynamics and Heat Transfer in Pool Boiling--Including the Effects of Conjugate Conduction, Level of Gravity, and Noncondensable Gas Dissolved in the Liquid  

E-Print Network [OSTI]

boiling. ” Journal of heat transfer, 124(4), 4. Basu, N. ,development. ” Journal of Heat Transfer, 127(2), 5. CareyA Review. ” Journal of Heat Transfer, 135(6), 061502. 10.

Aktinol, Eduardo

2014-01-01T23:59:59.000Z

119

Numerical Simulations of Bubble Dynamics and Heat Transfer in Pool Boiling--Including the Effects of Conjugate Conduction, Level of Gravity, and Noncondensable Gas Dissolved in the Liquid  

E-Print Network [OSTI]

flow boiling. ” Journal of heat transfer, 124(4), 4. Basu,Dhir, V. K. (2005). “Wall heat flux partitioning duringdevelopment. ” Journal of Heat Transfer, 127(2), 5. Carey

Aktinol, Eduardo

2014-01-01T23:59:59.000Z

120

Energy Crossroads: Ventilation, Infiltration & Indoor Air Quality |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ventilation, Infiltration & Indoor Air Quality Ventilation, Infiltration & Indoor Air Quality Suggest a Listing Air Infiltration and Ventilation Centre (AIVC) The AIVC fulfills its objectives by providing a range of services and facilities which include: Information, Technical Analysis, Technical Interchange, and Coordination. American Conference of Governmental Industrial Hygienists (ACGIH) The ACGIH offers high quality technical publications and learning opportunities. Americlean Services Corp. (ASC) ASC is a certified SBA 8(a) engineering/consulting firm specializing in HVAC contamination detection, abatement, and monitoring. In addition to highly professional ductwork cleaning and HVAC cleaning services, ASC offers a wide range of other engineering/ consulting/ management services

Note: This page contains sample records for the topic "include heating ventilation" 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

Analysis of space heating and domestic hot water systems for energy-efficient residential buildings  

SciTech Connect (OSTI)

An analysis of the best ways of meeting the space heating and domestic hot water (DHW) needs of new energy-efficient houses with very low requirements for space heat is provided. The DHW load is about equal to the space heating load in such houses in northern climates. The equipment options which should be considered are discussed, including new equipment recently introduced in the market. It is concluded that the first consideration in selecting systems for energy-efficient houses should be identification of the air moving needs of the house for heat distribution, heat storage, ventilation, and ventilative cooling. This is followed, in order, by selection of the most appropriate distribution system, the heating appliances and controls, and the preferred energy source, gas, oil, or electricity.

Dennehy, G

1983-04-01T23:59:59.000Z

122

Energy Impact of Residential Ventilation Norms in the United States  

E-Print Network [OSTI]

legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus by the American Society of Heating, Refrigerating and Air- conditioning Engineers (ASHRAE). This standard does but about the environment in which they lived. Historically, people have ventilated buildings to provide

123

Why We Ventilate - Recent Advances  

Broader source: Energy.gov (indexed) [DOE]

WHY WE VENTILATE: WHY WE VENTILATE: Recent Advances Max Sherman BA Stakeholders meeting ASHRAE BIO  Distinguished Lecturer  Exceptional Service Award  Board of Directors; TechC  Chair of committees:  62.2; Standards Committee  TC 4.3; TC 2.5  Holladay Distinguished Fellow OVERVIEW QUESTIONS  What is Ventilation? What is IAQ?  What functions does it provide?  How much do we need? Why?  How should ventilations standards be made? LBL has working on these problems Who Are You?  Engineers (ASHRAE Members & not);  architects,  contractors,  reps,  builders,  vendors,  code officials WHAT IS VENTILATION  Medicine: To Exchange Air In the Lungs  Latin: Ventilare, "to expose to the wind"  Today: To Bring In Outdoor Air And Replace

124

Procedures and Standards for Residential Ventilation System Commissioning:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Procedures and Standards for Residential Ventilation System Commissioning: Procedures and Standards for Residential Ventilation System Commissioning: An Annotated Bibliography Title Procedures and Standards for Residential Ventilation System Commissioning: An Annotated Bibliography Publication Type Report LBNL Report Number LBNL-6142E Year of Publication 2013 Authors J. Chris Stratton, and Craig P. Wray Keywords ASHRAE 62.2, commissioning, procedures, residential, standards, ventilation Abstract Beginning with the 2008 version of Title 24, new homes in California must comply with ANSI/ASHRAE Standard 62.2-2007 requirements for residential ventilation. Where installed, the limited data available indicate that mechanical ventilation systems do not always perform optimally or even as many codes and forecasts predict. Commissioning such systems when they are installed or during subsequent building retrofits is a step towards eliminating deficiencies and optimizing the tradeoff between energy use and acceptable IAQ. Work funded by the California Energy Commission about a decade ago at Berkeley Lab documented procedures for residential commissioning, but did not focus on ventilation systems. Since then, standards and approaches for commissioning ventilation systems have been an active area of work in Europe. This report describes our efforts to collect new literature on commissioning procedures and to identify information that can be used to support the future development of residential-ventilation-specific procedures and standards. We recommend that a standardized commissioning process and a commissioning guide for practitioners be developed, along with a combined energy and IAQ benefit assessment standard and tool, and a diagnostic guide for estimating continuous pollutant emission rates of concern in residences (including a database that lists emission test data for commercially-available labeled products).

125

HYBRID GROUND SOURCE HEAT PUMP SYSTEM SIMULATION USING VISUAL MODELING TOOL FOR HVACSIM+  

E-Print Network [OSTI]

, and plotting the output are also included. INTRODUCTION HVACSIM+, which stands for `HVAC SIMulation PLUS other systems', is a non-proprietary simulation package developed at the National Institute of Standards and Technology (NIST), Gaithersburg, Maryland, U.S.A. It is capable of modeling HVAC (heating, ventilation

126

association of companies and the Edison Electric Institute (1953). Their final report cites investigations from 1945 through 1953 and includes correlated information on coil data, heat  

E-Print Network [OSTI]

. The house has passive solar features consisting of south-facing glass with manually operable insulated to determine the heat pump capacity. The heating capacity of the heat pump in use is 34,100 Btu/hr (10 kw) at TEVAP = 35.6 F (2'C) and TCOND = 86.0 F (30°C). The cooling capacity of the heat pump was determined

Oak Ridge National Laboratory

127

Ventilation in Multifamily Buildings  

Broader source: Energy.gov (indexed) [DOE]

, 2011 , 2011 Ventilation in Multifamily Buildings Welcome to the Webinar! We will start at 2:00 PM Eastern Time Be sure that you are also dialed into the telephone conference call: Dial-in number: 888-324-9601; Pass code: 5551971 Download the presentation at: www.buildingamerica.gov/meetings.html Building Technologies Program eere.energy.gov Building America: Introduction November 1, 2011 Cheryn Engebrecht Cheryn.engebrecht@nrel.gov Building Technologies Program Building Technologies Program eere.energy.gov * Reduce energy use in new and existing residential buildings * Promote building science and systems engineering / integration approach * "Do no harm": Ensure safety, health and durability are maintained or improved * Accelerate adoption of high performance technologies

128

Evaluation of an Incremental Ventilation Energy Model for Estimating  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Evaluation of an Incremental Ventilation Energy Model for Estimating Evaluation of an Incremental Ventilation Energy Model for Estimating Impacts of Air Sealing and Mechanical Ventilation Title Evaluation of an Incremental Ventilation Energy Model for Estimating Impacts of Air Sealing and Mechanical Ventilation Publication Type Report LBNL Report Number LBNL-5796E Year of Publication 2012 Authors Logue, Jennifer M., William J. N. Turner, Iain S. Walker, and Brett C. Singer Date Published 06/2012 Abstract Changing the rate of airflow through a home affects the annual thermal conditioning energy.Large-scale changes to airflow rates of the housing stock can significantly alter the energy consumption of the residential energy sector. However, the complexity of existing residential energy models hampers the ability to estimate the impact of policy changes on a state or nationwide level. The Incremental Ventilation Energy (IVE) model developed in this study was designed to combine the output of simple airflow models and a limited set of home characteristics to estimate the associated change in energy demand of homes. The IVE model was designed specifically to enable modelers to use existing databases of home characteristics to determine the impact of policy on ventilation at a population scale. In this report, we describe the IVE model and demonstrate that its estimates of energy change are comparable to the estimates of a well-validated, complex residential energy model when applied to homes with limited parameterization. Homes with extensive parameterization would be more accurately characterized by complex residential energy models. The demonstration included a range of home types, climates, and ventilation systems that cover a large fraction of the residential housing sector.

129

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

130

Ventilation for an enclosure of a gas turbine and related method  

DOE Patents [OSTI]

A ventilation scheme for a rotary machine supported on pedestals within an enclosure having a roof, end walls and side walls with the machine arranged parallel to the side walls, includes ventilation air inlets located in a first end wall of the enclosure; a barrier wall located within the enclosure, proximate the first end wall to thereby create a plenum chamber. The barrier wall is constructed to provide a substantially annular gap between the barrier wall and a casing of the turbine to thereby direct ventilation air axially along the turbine; one or more ventilation air outlets located proximate a second, opposite end wall on the roof of the enclosure. In addition, one or more fans are provided for pulling ventilating air into said plenum chamber via the ventilation air inlets.

Schroeder, Troy Joseph (Mauldin, SC); Leach, David (Simpsonville, SC); O'Toole, Michael Anthony (Greenfield Center, NY)

2002-01-01T23:59:59.000Z

131

Internal combuston engine having separated cylinder head oil drains and crankcase ventilation passages  

DOE Patents [OSTI]

An internal combustion engine includes separated oil drain-back and crankcase ventilation passages. The oil drain-back passages extend from the cylinder head to a position below the top level of oil in the engine's crankcase. The crankcase ventilation passages extend from passages formed in the main bearing bulkheads from positions above the oil level in the crankcase and ultimately through the cylinder head. Oil dams surrounding the uppermost portions of the crankcase ventilation passages prevent oil from running downwardly through the crankcase ventilation passages.

Boggs, David Lee (Bloomfield Hills, MI); Baraszu, Daniel James (Plymouth, MI); Foulkes, David Mark (Erfstadt, DE); Gomes, Enio Goyannes (Ann Arbor, MI)

1998-01-01T23:59:59.000Z

132

Created: July, 2014 Laboratory Safety Design Guide Section 3 Laboratory Ventilation  

E-Print Network [OSTI]

Created: July, 2014 Laboratory Safety Design Guide Section 3 ­ Laboratory Ventilation 3-1 Section 3 ...................................................................................3-5 #12;Created: July, 2014 Laboratory Safety Design Guide Section 3 ­ Laboratory Ventilation 3-2 A without compromising safety or system integrity. The following should be included unless alternate design

Queitsch, Christine

133

Fresh Way to Cut Combustion, Crop and Air Heating Costs Avoids Million BTU Purchases: Inventions and Innovation Combustion Success Story  

SciTech Connect (OSTI)

Success story written for the Inventions and Innovation Program about a new space heating method that uses solar energy to heat incoming combustion, crop, and ventilation air.

Wogsland, J.

2001-01-17T23:59:59.000Z

134

Indoor Air Quality and Ventilation in Residential Deep Energy Retrofits  

SciTech Connect (OSTI)

Because airtightening is a significant part of Deep Energy Retrofits (DERs), concerns about ventilation and Indoor Air Quality (IAQ) have emerged. To investigate this, ventilation and IAQ were assessed in 17 non-smoking California Deep Energy Retrofit homes. Inspections and surveys were used to assess household activities and ventilation systems. Pollutant sampling performed in 12 homes included six-day passive samples of nitrogen dioxide (NO2), formaldehyde and air exchange rate (AER); time-resolved data loggers were used to measure particle counts. Half of the homes provided continuous mechanical ventilation. Despite these homes being twice as airtight (3.0 and 7.6 ACH50, respectively), their median AER was indistinguishable from naturally vented homes (0.36 versus 0.37 hr--1). Numerous problems were found with ventilation systems; however, pollutant levels did not reach levels of concern in most homes. Ambient NO2 standards were exceeded in some gas cooking homes that used legacy ranges with standing pilots, and in Passive House-style homes without range hoods exhausted to outside. Cooking exhaust systems were installed and used inconsistently. The majority of homes reported using low-emitting materials, and formaldehyde levels were approximately half those in conventional new CA homes (19.7 versus 36 ?g/m3), with emissions rates nearly 40percent less (12.3 versus 20.6 ?g/m2/hr.). Presence of air filtration systems led to lower indoor particle number concentrations (PN>0.5: 8.80E+06 PN/m3 versus 2.99E+06; PN>2.5: 5.46E+0.5 PN/m3 versus 2.59E+05). The results indicate that DERs can provide adequate ventilation and IAQ, and that DERs should prioritize source control, particle filtration and well-designed local exhaust systems, while still providing adequate continuous ventilation.

Less, Brennan; Walker, Iain

2014-06-01T23:59:59.000Z

135

Whole-House Ventilation | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Whole-House Ventilation Whole-House Ventilation Whole-House Ventilation May 30, 2012 - 2:37pm Addthis A whole-house ventilation system with dedicated ducting in a new energy-efficient home. | Photo courtesy of ©iStockphoto/brebca. A whole-house ventilation system with dedicated ducting in a new energy-efficient home. | Photo courtesy of ©iStockphoto/brebca. What does this mean for me? Whole-house ventilation is critical in an energy-efficient home to maintain adequate indoor air quality and comfort. The whole-house ventilation system you choose will depend upon your climate, budget, and the availability of experienced contractors in your area. Energy-efficient homes -- both new and existing -- require mechanical ventilation to maintain indoor air quality. There are four basic mechanical

136

Ventilation Requirements in Hot Humid Climates  

E-Print Network [OSTI]

the Building America program, LBNL has simulated the effects of mechanical ventilation systems that meet ASHRAE Standard 62.2 on ventilation, energy use and indoor humidity levels. In order to capture moisture related HVAC system operation..., LBNL has simulated the effects of mechanical ventilation systems that meet ASHRAE Standard 62.2 on ventilation, energy use and indoor humidity levels for houses that meet current (2005) International Energy Conservation Code requirements...

Walker, I. S.; Sherman, M. H.

2006-01-01T23:59:59.000Z

137

An overview of the TA-55, Building PF-4 ventilation system  

SciTech Connect (OSTI)

An overview of the TA-55, Building PF-4 ventilation system is provided in the following sections. Included are descriptions of the zone configurations, equipment-performance criteria, ventilation support systems, and the ventilation-system evaluation criteria. Section 4.2.1.1 provides a brief discussion of the ventilation system function. Section 4.2.1.2 provides details on the overall system configuration. Details of system interfaces and support systems are provided in Section 4.2.1.3. Section 4.2.1.4 describes instrumentation and control needed to operate the ventilation system. Finally, Sections 4.2.1.5 and 4.2.1.6 describe system surveillance/maintenance and Technical Safety Requirements (TSR) Limitations, respectively. Note that the numerical parameters included in this description are considered nominal; set points and other specifications actually fall within operational bands.

NONE

1994-02-22T23:59:59.000Z

138

RESIDENTIAL VENTILATION AND ENERGY CHARACTERISTICS*  

E-Print Network [OSTI]

to account for 1/3 to 1/2 of the space conditioning energy. There is not a great deal of measurement data opportunities, the United States Department of Energy and others need to put into perspective the energy based on energy conservation and ventilation strategies. Because of the lack of direct measurements, we

139

Preoperational test report, primary ventilation condenser cooling system  

SciTech Connect (OSTI)

This represents the preoperational test report for the Primary Ventilation Condenser Cooling System, Project W-030. Project W-030 provides a ventilation upgrade for the four Aging Waste Facility tanks. The system uses a closed chilled water piping loop to provide offgas effluent cooling for tanks AY101, AY102, AZ1O1, AZ102; the offgas is cooled from a nominal 100 F to 40 F. Resulting condensation removes tritiated vapor from the exhaust stack stream. The piping system includes a package outdoor air-cooled water chiller with parallel redundant circulating pumps; the condenser coil is located inside a shielded ventilation equipment cell. The tests verify correct system operation and correct indications displayed by the central Monitor and Control System.

Clifton, F.T.

1997-10-29T23:59:59.000Z

140

Effect of Outside Air Ventilation Rate on Volatile Organic Compound  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Outside Air Ventilation Rate on Volatile Organic Compound Outside Air Ventilation Rate on Volatile Organic Compound Concentrations in a Call Center Title Effect of Outside Air Ventilation Rate on Volatile Organic Compound Concentrations in a Call Center Publication Type Journal Article Year of Publication 2003 Authors Hodgson, Alfred T., David Faulkner, Douglas P. Sullivan, Dennis L. DiBartolomeo, Marion L. Russell, and William J. Fisk Journal Atmospheric Environment Volume 37 Start Page Chapter Pagination 5517-5528 Abstract A study of the relationship between outside air ventilation rate and concentrations of volatile organic compounds (VOCs) generated indoors was conducted in a call center office building. The building, with two floors and a floor area of 4,600 m2, was located in the San Francisco Bay Area, CA. Ventilation rates were manipulated with the building's four air handling units (AHUs). VOC concentrations in the AHU returns were measured on seven days during a 13-week period. VOC emission factors were determined for individual zones on days when they were operating at near steady-state conditions. The emission factor data were subjected to principal component (PC) analysis to identify groups of co-varying compounds. Potential sources of the PC vectors were ascribed based on information from the literature supporting the associations. Two vectors with high loadings of compounds including formaldehyde, 2,2,4-trimethyl-1,3- pentanediol monoisobutyrate, decamethylcyclopentasiloxane (d5 siloxane), and isoprene likely identified occupant-related sources. One vector likely represented emissions from building materials. Another vector represented emissions of solvents from cleaning products. The relationships between indoor minus outdoor VOC concentrations and ventilation rate were qualitatively examined for eight VOCs. Of these, acetaldehyde and hexanal, which were likely associated with material sources, and d5 siloxane exhibited general trends of higher concentrations at lower ventilation rates. For other compounds, the operation of the building and variations in pollutant generation and removal rates apparently combined to obscure the inverse relationship between VOC concentrations and ventilation. This result emphasizes the importance of utilizing source control measures, in addition to adequate ventilation, to limit concentrations of VOCs of concern in office buildings

Note: This page contains sample records for the topic "include heating ventilation" 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

Energy Impact of Residential Ventilation Norms in the UnitedStates  

SciTech Connect (OSTI)

The first and only national norm for residential ventilation in the United States is Standard 62.2-2004 published by the American Society of Heating, Refrigerating and Air-conditioning Engineers (ASHRAE). This standard does not by itself have the force of regulation, but is being considered for adoption by various jurisdictions within the U.S. as well as by various voluntary programs. The adoption of 62.2 would require mechanical ventilation systems to be installed in virtually all new homes, but allows for a wide variety of design solutions. These solutions, however, may have a different energy costs and non-energy benefits. This report uses a detailed simulation model to evaluate the energy impacts of currently popular and proposed mechanical ventilation approaches that are 62.2 compliant for a variety of climates. These results separate the energy needed to ventilate from the energy needed to condition the ventilation air, from the energy needed to distribute and/or temper the ventilation air. The results show that exhaust systems are generally the most energy efficient method of meeting the proposed requirements. Balanced and supply systems have more ventilation resulting in greater energy and their associated distribution energy use can be significant.

Sherman, Max H.; Walker, Iain S.

2007-02-01T23:59:59.000Z

142

Building America Case Study: Selecting Ventilation Systems for Existing Homes (Fact Sheet)  

SciTech Connect (OSTI)

This document addresses adding -or improving - mechanical ventilation systems to existing homes. The purpose of ventilation is to remove contaminants from homes, and this report discusses where, when, and how much ventilation is appropriate in a home, including some discussion of relevant codes and standards. Advantages, disadvantages, and approximate costs of various system types are presented along with general guidelines for implementing the systems in homes. CARB intends for this document to be useful to decision makers and contractors implementing ventilation systems in homes. Choosing the "best" system is not always straightforward; selecting a system involves balancing performance, efficiency, cost, required maintenance, and several other factors. It is the intent of this document to assist contractors in making more informed decisions when selecting systems. Ventilation is an integral part of a high-performance home. With more air-sealed envelopes, a mechanical means of removing contaminants is critical for indoor environmental quality and building durability.

Not Available

2014-12-01T23:59:59.000Z

143

Increasing ventilation in commercial cattle trailers to decrease shrink, morbidity, and mortality  

E-Print Network [OSTI]

moving livestock trailers, an experimental treatment that increased cross-ventilation within commercial cattle trailers by installing aluminum scoops to punch-hole trailers was evaluated. Environmental factors including temperature, ammonia and carbon...

Giguere, Nicole Marie

2009-06-02T23:59:59.000Z

144

Energy Performance Comparison of Heating and Air Conditioning Systems for Multi-Family Residential Buildings  

SciTech Connect (OSTI)

The type of heating, ventilation and air conditioning (HVAC) system has a large impact on the heating and cooling energy consumption in multifamily residential buildings. This paper compares the energy performance of three HVAC systems: a direct expansion (DX) split system, a split air source heat pump (ASHP) system, and a closed-loop water source heat pump (WSHP) system with a boiler and an evaporative fluid cooler as the central heating and cooling source. All three systems use gas furnace for heating or heating backup. The comparison is made in a number of scenarios including different climate conditions, system operation schemes and applicable building codes. It is found that with the minimum code-compliant equipment efficiency, ASHP performs the best among all scenarios except in extremely code climates. WSHP tends to perform better than the split DX system in cold climates but worse in hot climates.

Wang, Weimin; Zhang, Jian; Jiang, Wei; Liu, Bing

2011-07-31T23:59:59.000Z

145

Building ventilation and acoustics for people who don’t know much about building ventilation.  

Science Journals Connector (OSTI)

The architectural composition required for building ventilation used both for low energy cooling and improved air quality can be anathema to acoustical goals of speech privacy and noise control. This paper presents a short tutorial on the basics of cross ventilation stack ventilation comfort ventilation and indoor air quality as it relates to climate building type and indoor pollutants. It is geared to those without significant prior knowledge and follows a similar tutorial on geothermal systems presented at the Miami ASA conference.

2009-01-01T23:59:59.000Z

146

Solar Ventilation Preheating Resources and Technologies  

Broader source: Energy.gov [DOE]

This page provides a brief overview of solar ventilation preheating (SVP) technologies supplemented by specific information to apply SVP within the Federal sector.

147

Performance of unglazed solar ventilation air pre-heaters for broiler barns  

Science Journals Connector (OSTI)

Solar radiation is an interesting heat source for applications requiring a limited amount of energy, such as pre-heating cold fresh air used in venting livestock barns. The objective of this study was to evaluate the energy recovery efficiency of a solar air pre-heater consisting of an unglazed perforated black corrugated siding where the incoming fresh ventilation air picks up heat from its face and back. Installed on the southeast wall of two broiler barns located 40 km east of Montreal, Canada, the performance of solar air pre-heaters was monitored over 2 years. Sensors inside the barns monitored the temperature of the ambient air, that pre-heated by the solar collector and that exhausted by one of the three operating fans. An on-site weather station measured ambient air temperature, wind direction and velocity and radiation energy absorbed on a vertical plane parallel to the unglazed solar air pre-heaters. The measured vertical solar radiation value was used to evaluate the heat recovery efficiency of the unglazed solar air pre-heaters. Using data from the Varennes Environment Canada weather station located 30 km northwest, the solar sensors were found to measure the absorbed solar radiation with a maximum error of 7%, including differences in exterior air moisture. Unglazed, the efficiency of the solar air pre-heaters reached 65% for wind velocities under 2 m/s, but dropped below 25% for wind velocities exceeding 7 m/s. Nevertheless, the unglazed solar air pre-heaters were able to reduce the heating load especially in March of both years. Over a period starting in November and ending in March, the solar air heaters recovered an energy value equivalent to an annual return on investment of 4.7%.

Sébastien Cordeau; Suzelle Barrington

2011-01-01T23:59:59.000Z

148

Air Distribution Effectiveness for Residential Mechanical Ventilation: Simulation and Comparison of Normalized Exposures  

SciTech Connect (OSTI)

The purpose of ventilation is to dilute indoor contaminants that an occupant is exposed to. Even when providing the same nominal rate of outdoor air, different ventilation systems may distribute air in different ways, affecting occupants' exposure to household contaminants. Exposure ultimately depends on the home being considered, on source disposition and strength, on occupants' behavior, on the ventilation strategy, and on operation of forced air heating and cooling systems. In any multi-zone environment dilution rates and source strengths may be different in every zone and change in time, resulting in exposure being tied to occupancy patterns.This paper will report on simulations that compare ventilation systems by assessing their impact on exposure by examining common house geometries, contaminant generation profiles, and occupancy scenarios. These simulations take into account the unsteady, occupancy-tied aspect of ventilation such as bathroom and kitchen exhaust fans. As most US homes have central HVAC systems, the simulation results will be used to make appropriate recommendations and adjustments for distribution and mixing to residential ventilation standards such as ASHRAE Standard 62.2.This paper will report on work being done to model multizone airflow systems that are unsteady and elaborate the concept of distribution matrix. It will examine several metrics for evaluating the effect of air distribution on exposure to pollutants, based on previous work by Sherman et al. (2006).

Petithuguenin, T.D.P.; Sherman, M.H.

2009-05-01T23:59:59.000Z

149

Predicting hottest spot temperatures in ventilated dry type transformer windings  

SciTech Connect (OSTI)

Test data indicates that hottest spot allowances used in IEEE standards for ventilated dry type transformers above 500 kVA are too low. A mathematical model to predict hottest spot temperature rises in ventilated dry type transformers was developed. Data from six layer type test windings and a 2500 kva prototype was used to refine the model. A correlation for the local heat transfer coefficient in the cooling ducts was developed. The model was used to study the effect of various parameters on the ratio of hottest spot to average winding temperature rise. The number of conductor layers, insulation thickness, and conductor strand size were found to have only a minor effect on the ratio. Winding height was found to be the main parameter influencing the ratio of hottest spot to average winding temperature rise. The study based on the mathematical model confirmed previous conclusions based on test data that the hottest spot allowances used in IEEE standards for ventilated dry type transformers above 500 kVA should be revised.

Pierce, L.W. (General Electric Co., Rome, GA (United States))

1994-04-01T23:59:59.000Z

150

Waste Heat Management Options for Improving Industrial Process Heating Systems  

Broader source: Energy.gov [DOE]

This presentation covers typical sources of waste heat from process heating equipment, characteristics of waste heat streams, and options for recovery including Combined Heat and Power.

151

NUMERICAL ANALYSIS OF VENTILATION TEMPERATURES REGULATION BY ENERGY STORAGE IN PHASE CHANGE  

E-Print Network [OSTI]

NUMERICAL ANALYSIS OF VENTILATION TEMPERATURES REGULATION BY ENERGY STORAGE IN PHASE CHANGE, the use of thermal energy storage (TES) systems receives increasing interest. To allow high or low temperature thermal energy to be stored for later use, a heat or cool storage with PCM could be designed; Zhu

Paris-Sud XI, Université de

152

Federal Energy Management Program: Solar Ventilation Preheating Resources  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Ventilation Solar Ventilation Preheating Resources and Technologies to someone by E-mail Share Federal Energy Management Program: Solar Ventilation Preheating Resources and Technologies on Facebook Tweet about Federal Energy Management Program: Solar Ventilation Preheating Resources and Technologies on Twitter Bookmark Federal Energy Management Program: Solar Ventilation Preheating Resources and Technologies on Google Bookmark Federal Energy Management Program: Solar Ventilation Preheating Resources and Technologies on Delicious Rank Federal Energy Management Program: Solar Ventilation Preheating Resources and Technologies on Digg Find More places to share Federal Energy Management Program: Solar Ventilation Preheating Resources and Technologies on AddThis.com... Energy-Efficient Products

153

Low-Cost Ventilation in Production Housing - Building America...  

Energy Savers [EERE]

Low-Cost Ventilation in Production Housing - Building America Top Innovation Low-Cost Ventilation in Production Housing - Building America Top Innovation This drawing shows simple...

154

Webinar: Ventilation and Filtration Strategies with Indoor airPLUS...  

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

Ventilation and Filtration Strategies with Indoor airPLUS and Zero Energy Ready Homes Webinar: Ventilation and Filtration Strategies with Indoor airPLUS and Zero Energy...

155

Smart Ventilation (RIVEC) - 2014 BTO Peer Review | Department...  

Broader source: Energy.gov (indexed) [DOE]

technology. Their mechanical ventilation systems dominate for energy use; as the foundation, wall, and roof work together. Smart ventilation is expected to save at least 40% on...

156

Summer Infiltration/Ventilation Test Results from the FRTF Laboratory...  

Broader source: Energy.gov (indexed) [DOE]

Summer InfiltrationVentilation Test Results from the FRTF Laboratory Summer InfiltrationVentilation Test Results from the FRTF Laboratory This presentation was delivered at the...

157

Procedures and Standards for Residential Ventilation System  

E-Print Network [OSTI]

1 Procedures and Standards for Residential Ventilation System Commissioning: An Annotated, commissioning, procedures, standards, ASHRAE 62.2 Please use the following citation for this report: Stratton, J.C. and C.P. Wray. 2013. Procedures and Standards for Residential Ventilation System Commissioning

158

Building America Top Innovations Hall of Fame Profile … Low-Cost Ventilation in Production Housing  

Broader source: Energy.gov (indexed) [DOE]

simple, cost-effective techniques for providing fresh air throughout the home, including exhaust-only and central fan-integrated supply ventilation. Building America has refined simple whole-house ventilation systems that cost less than $350 to install. BUILDING AMERICA TOP INNOVATIONS HALL OF FAME PROFILE INNOVATIONS CATEGORY: 1. Advanced Technologies and Practices 1.3 Assured Health, Safety, and Durability Low-Cost Ventilation in Production Housing As high-performance homes get more air-tight and better insulated, attention to good indoor air quality becomes essential. Building America has effectively guided the nation's home builders to embrace whole-house ventilation by developing low-cost options that adapt well to their production processes. When the U.S. Department of Energy's Building America research teams began

159

Current Concepts: Weaning Patients from the Ventilator  

Science Journals Connector (OSTI)

...neurologic ICUs. Patients who require reintubation have an increased risk of death, a prolonged hospital stay, and a decreased likelihood of returning home, as compared with patients in whom discontinuation of mechanical ventilation is successful. Thus, it is essential that critical care physicians identify... In the United States, almost 800,000 patients who are hospitalized each year require mechanical ventilation.1 This estimate excludes neonates, and there is little doubt that mechanical ventilation will be increasingly used as the number of patients 65 ...

McConville J.F.; Kress J.P.

2012-12-06T23:59:59.000Z

160

Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements  

Broader source: Energy.gov [DOE]

The webinar will focus on key challenges in multifamily ventilation and strategies to address these challenges.

Note: This page contains sample records for the topic "include heating ventilation" 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

Total analysis of cooling effects of cross-ventilation affected by microclimate around a building  

Science Journals Connector (OSTI)

This study aims to develop a simulation system for evaluating the passive cooling effects, such as cross-ventilation, solar shading by trees, etc. Since the passive cooling effects are strongly affected by the spatial distributions of airflow, air temperature and radiative heat transports around a building, the microclimate around a building should be accurately predicted for this type of simulations. In this study, convective and radiative heat transports around buildings are analyzed by CFD (computational fluid dynamics) and radiation computations. Furthermore, the heat load calculation with the program “TRNSYS” was carried out, using the values of the cross-ventilation rates predicted by CFD computation and incoming solar radiation onto the building walls under the shade of trees obtained by the radiation computation as boundary conditions. Indoor velocity and indoor air temperature obtained by the simulation system developed here showed generally good agreement with measured data.

Akashi Mochida; Hiroshi Yoshino; Satoshi Miyauchi; Teruaki Mitamura

2006-01-01T23:59:59.000Z

162

AEDG Implementation Recommendations: Ventilation | Building Energy Codes  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ventilation Ventilation The Advanced Energy Design Guide (AEDG) for Small Office Buildings, 30% series, seeks to achieve 30% savings over ASHRAE Standard 90.1-1999. This guide focuses on improvements to small office buildings, less than 20,000ft2. The recommendations in this article are adapted from the implementation section of the guide and focus on ventilation air; exhaust air; control strategies; carbon dioxide sensors; economizers. Publication Date: Wednesday, May 13, 2009 air_ventilation.pdf Document Details Affiliation: DOE BECP Focus: Compliance Building Type: Commercial Code Referenced: ASHRAE Standard 90.1-1999 Document type: AEDG Implementation Recommendations Target Audience: Architect/Designer Builder Contractor Engineer State: All States Contacts Web Site Policies

163

Chlorofluorocarbon Constraints on North Atlantic Ventilation  

Science Journals Connector (OSTI)

The North Atlantic Ocean vigorously ventilates the ocean interior. Thermocline and deep water masses are exposed to atmospheric contact there and are sequestered in two principal classes: Subtropical Mode Water (STMW: 26.5 ? ?? ? 26.8) and ...

Thomas W. N. Haine; Kelvin J. Richards; Yanli Jia

2003-08-01T23:59:59.000Z

164

Scale model studies of displacement ventilation  

E-Print Network [OSTI]

Displacement ventilation is an air conditioning method that provides conditioned air to indoor environments with the goal to improve air quality while reducing energy consumption. This study investigates the performance ...

Okutan, Galip Mehmet

1995-01-01T23:59:59.000Z

165

Evaluation of Ventilation Strategies in New Construction Multifamily Buildings  

SciTech Connect (OSTI)

In multifamily buildings, particularly in the Northeast, exhaust ventilation strategies are the norm as a means of meeting both local exhaust and whole-unit mechanical ventilation rates. The issue of where the 'fresh' air is coming from is gaining significance as air-tightness standards for enclosures become more stringent, and the 'normal leakage paths through the building envelope' disappear. CARB researchers have found that the majority of high performance, new construction, multifamily housing in the Northeast use one of four general strategies for ventilation: continuous exhaust only with no designated supply or make-up air source, continuous exhaust with ducted make-up air to apartments, continuous exhaust with supply through a make-up air device integral to the unit HVAC, and continuous exhaust with supply through a passive inlet device, such as a trickle vent. Insufficient information is available to designers on how these various systems are best applied. Product performance data are based on laboratory tests, and the assumption is that products will perform similarly in the field. Proper application involves matching expected performance at expected building pressures, but there is no guarantee that those conditions will exist consistently in the finished building. This research effort, which included several weeks of building pressure monitoring, sought to provide field validation of system performance. The performance of four substantially different strategies for providing make-up air to apartments was evaluated.

Maxwell, S.; Berger, D.; Zuluaga, M.

2014-07-01T23:59:59.000Z

166

Assessment of Indoor Air Quality Benefits and Energy Costs of Mechanical Ventilation  

E-Print Network [OSTI]

Quality Benefits and Energy Costs of Mechanical VentilationQuality Benefits and Energy Costs of Mechanical VentilationQuality Benefits and Energy Costs of Mechanical Ventilation

Logue, J.M.

2012-01-01T23:59:59.000Z

167

Advanced Controls and Sustainable Systems for Residential Ventilation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Advanced Controls and Sustainable Systems for Residential Ventilation Advanced Controls and Sustainable Systems for Residential Ventilation Title Advanced Controls and Sustainable Systems for Residential Ventilation Publication Type Report LBNL Report Number LBNL-5968E Year of Publication 2012 Authors Turner, William J. N., and Iain S. Walker Date Published 12/2012 Keywords ashrae standard 62,2, california title 24, passive ventilation, residential ventilation, ventilation controller Abstract Whole-house ventilation systems are becoming commonplace in new construction, remodeling/renovation, and weatherization projects, driven by combinations of specific requirements for indoor air quality (IAQ), health, and compliance with standards, such as ASHRAE 62.2. At the same time we wish to reduce the energy use in homes and therefore minimize the energy used to provide ventilation. This study examined several approaches to reducing the energy requirements of providing acceptable IAQ in residential buildings. Two approaches were taken. The first used RIVEC - the Residential Integrated VEntilation Controller - a prototype ventilation controller that aims to deliver whole-house ventilation rates that comply with ventilation standards, for the minimum use of energy. The second used passive and hybrid ventilation systems, rather than mechanical systems, to provide whole-house ventilation.

168

Water and Space Heating Heat Pumps  

E-Print Network [OSTI]

This paper discusses the design and operation of the Trane Weathertron III Heat Pump Water Heating System and includes a comparison of features and performance to other domestic water heating systems. Domestic water is generally provided through...

Kessler, A. F.

1985-01-01T23:59:59.000Z

169

#AskEnergySaver: Home Heating | Department of Energy  

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

on how ventilation and air leakage impact a home's energy use. 1. How can I recover my loss heat from my furnace exhaust? -- from @DezGardner007 on Twitter IW: The simplest way...

170

Smart School Symposium Heating Ventilation and Air Conditioning Session  

E-Print Network [OSTI]

used in Schools Efficiency Metrics for HVAC Equipment Historical Perspective on Efficiency · Weather data is not the same, and has a big impact on building loads as well as the performance of HVAC;School Load Data Metrics · Using the ASHRAE 90.1 benchmark buildings models I have developed

California at Davis, University of

171

Underground ventilation remote monitoring and control system  

SciTech Connect (OSTI)

This paper presents the design and installation of an underground ventilation remote monitoring and control system at the Waste Isolation Pilot Plant. This facility is designed to demonstrate safe underground disposal of U.S. defense generated transuranic nuclear waste. To improve the operability of the ventilation system, an underground remote monitoring and control system was designed and installed. The system consists of 15 air velocity sensors and 8 differential pressure sensors strategically located throughout the underground facility providing real-time data regarding the status of the ventilation system. In addition, a control system was installed on the main underground air regulators. The regulator control system gives indication of the regulator position and can be controlled either locally or remotely. The sensor output is displayed locally and at a central surface location through the site-wide Central Monitoring System (CMS). The CMS operator can review all sensor data and can remotely operate the main underground regulators. Furthermore, the Virtual Address Extension (VAX) network allows the ventilation engineer to retrieve real-time ventilation data on his personal computer located in his workstation. This paper describes the types of sensors selected, the installation of the instrumentation, and the initial operation of the remote monitoring system.

Strever, M.T.; Wallace, K.G. Jr.; McDaniel, K.H.

1995-12-31T23:59:59.000Z

172

Segmented heat exchanger  

DOE Patents [OSTI]

A segmented heat exchanger system for transferring heat energy from an exhaust fluid to a working fluid. The heat exchanger system may include a first heat exchanger for receiving incoming working fluid and the exhaust fluid. The working fluid and exhaust fluid may travel through at least a portion of the first heat exchanger in a parallel flow configuration. In addition, the heat exchanger system may include a second heat exchanger for receiving working fluid from the first heat exchanger and exhaust fluid from a third heat exchanger. The working fluid and exhaust fluid may travel through at least a portion of the second heat exchanger in a counter flow configuration. Furthermore, the heat exchanger system may include a third heat exchanger for receiving working fluid from the second heat exchanger and exhaust fluid from the first heat exchanger. The working fluid and exhaust fluid may travel through at least a portion of the third heat exchanger in a parallel flow configuration.

Baldwin, Darryl Dean (Lafayette, IN); Willi, Martin Leo (Dunlap, IL); Fiveland, Scott Byron (Metamara, IL); Timmons, Kristine Ann (Chillicothe, IL)

2010-12-14T23:59:59.000Z

173

Energy Performance and Economic Evaluations of the Geothermal Heat Pump System used in the KnowledgeWorks I and II Buildings, Blacksburg, Virginia.  

E-Print Network [OSTI]

??Heating, Ventilating and Air Conditioning Systems (HVAC) are not only one of the most energy consuming components in buildings but also contribute to green house… (more)

Charoenvisal, Kongkun

2008-01-01T23:59:59.000Z

174

Test Plan to Evaluate the Relationship Among IAQ, Comfort, Moisture, and Ventilation in Humid Climates  

SciTech Connect (OSTI)

This experimental plan describes research being conducted by Pacific Northwest National Laboratory (PNNL), in coordinatation with Florida Solar Energy Center (FSEC), Florida HERO, and Lawrence Berkeley National Laboratory (LBNL) to evaluate the impact of ventilation rate on interior moisture levels, temperature distributions, and indoor air contaminant concentrations. Specifically, the research team will measure concentrations of indoor air contaminants, ventilation system flow rates, energy consumption, and temperature and relative humidity in ten homes in Gainesville, FL to characterize indoor pollutant levels and energy consumption associated with the observed ventilation rates. PNNL and FSEC have collaboratively prepared this experimental test plan, which describes background and context for the proposed study; the experimental design; specific monitoring points, including monitoring equipment, and sampling frequency; key research questions and the associated data analysis approach; experimental logistics, including schedule, milestones, and team member contact information; and clearly identifies the roles and responsibilities of each team in support of project objectives.

Widder, Sarah H.; Martin, Eric

2013-03-15T23:59:59.000Z

175

Software Verification & Validation Report for the 244-AR Vault Interim Stabilization Ventilation System  

SciTech Connect (OSTI)

This document reports on the analysis, testing and conclusions of the software verification and validation for the 244-AR Vault Interim Stabilization ventilation system. Automation control system will use the Allen-Bradley software tools for programming and programmable logic controller (PLC) configuration. The 244-AR Interim Stabilization Ventilation System will be used to control the release of radioactive particles to the environment in the containment tent, located inside the canyon of the 244-AR facility, and to assist the waste stabilization efforts. The HVAC equipment, ducts, instruments, PLC hardware, the ladder logic executable software (documented code), and message display terminal are considered part of the temporary ventilation system. The system consists of a supply air skid, temporary ductwork (to distribute airflow), and two skid-mounted, 500-cfm exhausters connected to the east filter building and the vessel vent system. The Interim Stabilization Ventilation System is a temporary, portable ventilation system consisting of supply side and exhaust side. Air is supplied to the containment tent from an air supply skid. This skid contains a constant speed fan, a pre-filter, an electric heating coil, a cooling coil, and a constant flow device (CFD). The CFD uses a passive component that allows a constant flow of air to pass through the device. Air is drawn out of the containment tent, cells, and tanks by two 500-cfm exhauster skids running in parallel. These skids are equipped with fans, filters, stack, stack monitoring instrumentation, and a PLC for control. The 500CFM exhaust skids were fabricated and tested previously for saltwell pumping activities. The objective of the temporary ventilation system is to maintain a higher pressure to the containment tent, relative to the canyon and cell areas, to prevent contaminants from reaching the containment tent.

YEH, T.

2002-11-20T23:59:59.000Z

176

MODELING VENTILATION SYSTEM RESPONSE TO FIRE  

SciTech Connect (OSTI)

Fires in facilities containing nuclear material have the potential to transport radioactive contamination throughout buildings and may lead to widespread downwind dispersal threatening both worker and public safety. Development and implementation of control strategies capable of providing adequate protection from fire requires realistic characterization of ventilation system response which, in turn, depends on an understanding of fire development timing and suppression system response. This paper discusses work in which published HEPA filter data was combined with CFAST fire modeling predictions to evaluate protective control strategies for a hypothetical DOE non-reactor nuclear facility. The purpose of this effort was to evaluate when safety significant active ventilation coupled with safety class passive ventilation might be a viable control strategy.

Coutts, D

2007-04-17T23:59:59.000Z

177

E-Print Network 3.0 - air treatment system Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Last Updated: 41702 Summary: , including refrigeration, air conditioning, heating systems, ventilating fans, roof ventilators, exhaust fans... , water treatment equipment,...

178

E-Print Network 3.0 - air conditioning maintenance Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Last Updated: 41702 Summary: , including refrigeration, air conditioning, heating systems, ventilating fans, roof ventilators, exhaust fans... : Use of mechanical equipment...

179

E-Print Network 3.0 - air handling systems Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Last Updated: 41702 Summary: , including refrigeration, air conditioning, heating systems, ventilating fans, roof ventilators, exhaust fans... , water treatment equipment,...

180

HOW THE LEED VENTILATION CREDIT IMPACTS ENERGY CONSUMPTION OF GSHP SYSTEMS A CASE STUDY FOR PRIMARY SCHOOLS  

SciTech Connect (OSTI)

This paper presents a study on the impacts of increased outdoor air (OA) ventilation on the performance of ground-source heat pump (GSHP) systems that heat and cool typical primary schools. Four locations Phoenix, Miami, Seattle, and Chicago are selected in this study to represent different climate zones in the United States. eQUEST, an integrated building and HVAC system energy analysis program, is used to simulate a typical primary school and the GSHP system at the four locations with minimum and 30% more than minimum OA ventilation. The simulation results show that, without an energy recovery ventilator, the 30% more OA ventilation results in an 8.0 13.3% increase in total GSHP system energy consumption at the four locations. The peak heating and cooling loads increase by 20.2 30% and 14.9 18.4%, respectively, at the four locations. The load imbalance of the ground heat exchanger is increased in hot climates but reduced in mild and cold climates.

Liu, Xiaobing [ORNL] [ORNL

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Proceedings of the Intern. Conference on Passive and Low Energy Architecture (PLEA), Toulouse (2002) 577 Cost efficiency of ventilation systems  

E-Print Network [OSTI]

Proceedings of the Intern. Conference on Passive and Low Energy Architecture (PLEA), Toulouse (2002 of a corresponding low-energy house have been per- formed for a full heating period. They reproduce measurements from, air quality, control of humidity) [1, 2]. In such houses, the ventilation and infiltration losses

Gieseler, Udo D. J.

182

Review on Ventilation Rate Measuring and Modeling Techniques in Naturally  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Review on Ventilation Rate Measuring and Modeling Techniques in Naturally Review on Ventilation Rate Measuring and Modeling Techniques in Naturally Ventilated Building Speaker(s): Sezin Eren Ozcan Date: May 16, 2006 - 12:00pm Location: Bldg. 90 Due to limited energy sources, countries are looking for alternative solutions to decrease energy needs. In that context, natural ventilation can be seen as a very attractive sustainable technique in building design. However, understanding of ventilation dynamics is needed to provide an efficient control. Ventilation rate has to be determined not only in terms of energy, but also for controlling indoor air quality and emissions. For these reasons, agricultural buildings (livestock houses, greenhouses, etc.), naturally ventilated industrial buildings, and residences require a reliable ventilation rate measuring technique. Measuring techniques suffer

183

Design of a Natural Ventilation System in the Dunhuang Museum  

E-Print Network [OSTI]

Fresh air and good air quality can be obtained by a natural ventilation system, to fulfill the requirement of near natural conditions for the psychological health of mankind. A natural ventilation system is an ecological, energy saving system...

Zhang, Y.; Guan, W.

2006-01-01T23:59:59.000Z

184

A scale model study of displacement ventilation with chilled ceilings  

E-Print Network [OSTI]

Displacement ventilation is a form of air-conditioning which provides good air quality and some energy savings. The air quality is better than for a conventional mixed ventilation system. The maximum amount of cooling that ...

Holden, Katherine J. A. (Katherine Joan Adrienne)

1995-01-01T23:59:59.000Z

185

Home Heating | Department of Energy  

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

Home Heating Everything you need to know about home heating, including how heating systems work, the different types on the market and proper maintenance. Read more Thermostats...

186

Heating systems for heating subsurface formations  

DOE Patents [OSTI]

Methods and systems for heating a subsurface formation are described herein. A heating system for a subsurface formation includes a sealed conduit positioned in an opening in the formation and a heat source. The sealed conduit includes a heat transfer fluid. The heat source provides heat to a portion of the sealed conduit to change phase of the heat transfer fluid from a liquid to a vapor. The vapor in the sealed conduit rises in the sealed conduit, condenses to transfer heat to the formation and returns to the conduit portion as a liquid.

Nguyen, Scott Vinh (Houston, TX); Vinegar, Harold J. (Bellaire, TX)

2011-04-26T23:59:59.000Z

187

Effect of repository underground ventilation on emplacement drift temperature control  

SciTech Connect (OSTI)

The repository advanced conceptual design (ACD) is being conducted by the Civilian Radioactive Waste Management System, Management & Operating Contractor. Underground ventilation analyses during ACD have resulted in preliminary ventilation concepts and design methodologies. This paper discusses one of the recent evaluations -- effects of ventilation on emplacement drift temperature management.

Yang, H.; Sun, Y.; McKenzie, D.G.; Bhattacharyya, K.K. [Morrison Knudson Corporation, Las Vegas, NV (United States)

1996-02-01T23:59:59.000Z

188

Experimental simulation of wind driven cross-ventilation in a naturally ventilated building  

E-Print Network [OSTI]

A device was designed and constructed to simulate cross-ventilation through a building due to natural wind. The wind driver device was designed for use with a one tenth scale model of an open floor plan office building in ...

Hult, Erin L. (Erin Luelle), 1982-

2004-01-01T23:59:59.000Z

189

Humidity Implications for Meeting Residential Ventilation Requirements  

E-Print Network [OSTI]

residential ventilation standard, ASHRAE Standard 62.2. Because meeting this standard can significantly change, Kansas City, Seattle, Minneapolis and Phoenix). In order to capture moisture related HVAC system.2, design strategies for moisture control, humidity and comfort. #12;INTRODUCTION ASHRAE standards 62

190

May 1999 LBNL -42975 ASHRAE'S RESIDENTIAL VENTILATION  

E-Print Network [OSTI]

indoor air quality in dwellings and to set minimum standards that would allow for energy efficiency Secretary for Energy Efficiency and Renewable Energy, Office of Building Technology of the U.S. Department measures to be evaluated. The standard has requirements for whole-house ventilation, local exhaust

191

Hysteresis effects in hybrid building ventilation  

E-Print Network [OSTI]

Cross- breeze Kitchen Stove Ambient air Case study #3 #12;· Wind plays an integral role in low-energy remains a central challenge for the successful implementation of natural ventilation Case study - summary of population, urban energy consumption grows by 2.1% · Buildings consume 40% of world's energy

Flynn, Morris R.

192

Flexible Residential Test Facility: Impact of Infiltration and Ventilation on Measured Cooling Season Energy and Moisture Levels  

SciTech Connect (OSTI)

Air infiltration and ventilation in residential buildings is a very large part of the heating loads, but empirical data regarding the impact on space cooling has been lacking. Moreover, there has been little data on how building tightness might relate to building interior moisture levels in homes in a hot and humid climate. To address this need, BA-PIRC has conducted research to assess the moisture and cooling load impacts of airtightness and mechanical ventilation in two identical laboratory homes in the hot-humid climate over the cooling season.

Parker, D.; Kono, J.; Vieira, R.; Fairey, P.; Sherwin, J.; Withers, C.; Hoak, D.; Beal, D.

2014-05-01T23:59:59.000Z

193

Floatable solar heat modules  

SciTech Connect (OSTI)

A floating solar heat module for swimming pools comprises a solid surface for conducting heat from the sun's rays to the water and further includes a solid heat storage member for continual heating even during the night. A float is included to maintain the solar heat module on the surface of the pool. The solid heat storage medium is a rolled metal disk which is sandwiched between top and bottom heat conducting plates, the top plate receiving the heat of the sun's rays through a transparent top panel and the bottom plate transferring the heat conducted through the top plate and rolled disk to the water.

Ricks, J.W.

1981-09-29T23:59:59.000Z

194

Thermoelectric heat exchange element  

DOE Patents [OSTI]

A thermoelectric heat exchange module includes a first substrate including a heat receptive side and a heat donative side and a series of undulatory pleats. The module may also include a thermoelectric material layer having a ZT value of 1.0 or more disposed on at least one of the heat receptive side and the heat donative side, and an electrical contact may be in electrical communication with the thermoelectric material layer.

Callas, James J. (Peoria, IL); Taher, Mahmoud A. (Peoria, IL)

2007-08-14T23:59:59.000Z

195

Fouling of HVAC Fin and Tube Heat Exchangers Jeffrey Siegel and Van P. Carey  

E-Print Network [OSTI]

Fouling of heat exchangers used in heating, ventilating, and air conditioning (HVAC) systems is important contributor to overall energy use and peak electric demand. Furthermore, the location of heat exchangers in HVAC systems means that if bioaerosols containing bacteria, fungi, and viruses deposit on heat

196

Performance Test and Energy Saving Analysis of a Heat Pipe Dehumidifier  

E-Print Network [OSTI]

Heat pipe technology applied to ventilation, dryness, and cooling and heating radiator in a building is introduced in this paper. A new kind of heat pipe dehumidifier is designed and tested. The energy-saving ratio with the heat pipe dehumidifier...

Zhao, X.; Li, Q.; Yun, C.

2006-01-01T23:59:59.000Z

197

Performance Assessment of Photovoltaic Attic Ventilator Fans  

Broader source: Energy.gov [DOE]

A case study of photovoltaic attic ventilator fans was conducted on an occupied single family home in Central Florida. Two fans were installed at mid-summer in an instrumented home where attic air temperature, meteorological conditions and space cooling electric power were measured. The home already had an attic radiant barrier, but still experienced attic air temperatures in excess of 130oF.

198

A ground-coupled storage heat pump system with waste heat recovery  

SciTech Connect (OSTI)

This paper reports on an experimental single-family residence that was constructed to demonstrate integration of waste heat recovery and seasonal energy storage using both a ventilating and a ground-coupled heat pump. Called the Idaho energy Conservation Technology House, it combines superinsulated home construction with a ventilating hot water heater and a ground coupled water-to-water heat pump system. The ground heat exchangers are designed to economically promote seasonal and waste heat storage. Construction of the house was completed in the spring of 1989. Located in Moscow, Idaho, the house is occupied by a family of three. The 3,500 ft{sup 2} (325 m{sup 2}) two-story house combines several unique sub-systems that all interact to minimize energy consumption for space heating and cooling, and domestic hot water.

Drown, D.C.; Braven, K.R.D. (Univ. of Idaho, ID (US)); Kast, T.P. (Thermal Dynamic Towers, Boulder, CO (US))

1992-02-01T23:59:59.000Z

199

Alabama Power - Residential Heat Pump and Weatherization Loan Programs |  

Broader source: Energy.gov (indexed) [DOE]

Alabama Power - Residential Heat Pump and Weatherization Loan Alabama Power - Residential Heat Pump and Weatherization Loan Programs Alabama Power - Residential Heat Pump and Weatherization Loan Programs < Back Eligibility Residential Savings Category Home Weatherization Commercial Weatherization Sealing Your Home Design & Remodeling Windows, Doors, & Skylights Ventilation Heating & Cooling Commercial Heating & Cooling Heat Pumps Appliances & Electronics Water Heating Maximum Rebate Windows: $350 Program Info State Alabama Program Type Utility Loan Program Rebate Amount Not specified Provider Alabama Power Alabama Power offers low-interest loans to residential customers to purchase and install new heat pumps and a variety of weatherization measures. The loans require no money down and can be used to finance an air

200

Analysis of Solar Passive Techniques and Natural Ventilation Concepts in a Residential Building Including CFD Simulation  

E-Print Network [OSTI]

(global horizontal, direct normal and diffuse horizontal) and wind conditions (direction and speed). It is possible that climate data file does not fit exactly to the characteristics of Cerdanyola del Vall?s, which is further from the coast and has... 61.10 3.01 53.60 0.00 117.71 Mar 68.26 5.75 10.12 2.52 86.64 Apr 65.16 14.65 0.00 15.81 95.62 May 67.19 21.48 0.00 40.70 129.37 Jun 66.23 33.88 0.00 112.05 212.15 Jul 67.19 46.70 0.00 196.57 310.46 Aug 67.72 47.77 0.00 209.61 325.10 Sep 65...

Quince, N.; Ordonez, A.; Bruno, J. C.; Coronas, A.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Should Title 24 Ventilation Requirements Be Amended to include an Indoor Air Quality Procedure?  

E-Print Network [OSTI]

predicted indoor air quality and energy consumption using aquality procedure (IAQP) that may result in lower VRs than the VRP, with associated energyquality procedure” (IAQP), with both objective and subjective components, intended to provide greater flexibility and potentially enable energy

Dutton, Spencer M.

2014-01-01T23:59:59.000Z

202

Should Title 24 Ventilation Requirements Be Amended to include an Indoor Air Quality Procedure?  

E-Print Network [OSTI]

ASHRAE. California Energy Commission (2008). 2008 BuildingCA, California Energy Commission. Dutton, S. M. , W. R.to the California Energy Commission is to pursue option 2

Dutton, Spencer M.

2014-01-01T23:59:59.000Z

203

Ventilation Effectiveness Research at UT-Typer Lab Houses  

Broader source: Energy.gov (indexed) [DOE]

Ventilation Effectiveness Research Ventilation Effectiveness Research at UT-Tyler Lab Houses Source Of Outside Air, Distribution, Filtration Armin Rudd Twin (almost) Lab Houses at UT-Tyler House 2: Unvented attic, House 1: Vented attic lower loads + PV Ventilation Effectiveness Research 30 April 2013 2 * 1475 ft 2 , 3-bedroom houses * House 2 was mirrored plan * 45 cfm 62.2 ventilation rate * Garage connected to house on only one wall * Access to attic via pull-down stairs in garage * Further access to House 2 unvented attic through gasket sealed door Ventilation Effectiveness Research 30 April 2013 3 Testing Approach  Building enclosure and building mechanical systems characterization by measurement of building enclosure air leakage, central air distribution system airflows, and ventilation system airflows.

204

New and Underutilized Technology: Carbon Dioxide Demand Ventilation Control  

Broader source: Energy.gov (indexed) [DOE]

Carbon Dioxide Demand Ventilation Carbon Dioxide Demand Ventilation Control New and Underutilized Technology: Carbon Dioxide Demand Ventilation Control October 4, 2013 - 4:23pm Addthis The following information outlines key deployment considerations for carbon dioxide (CO2) demand ventilation control within the Federal sector. Benefits Demand ventilation control systems modulate ventilation levels based on current building occupancy, saving energy while still maintaining proper indoor air quality (IAQ). CO2 sensors are commonly used, but a multiple-parameter approach using total volatile organic compounds (TVOC), particulate matter (PM), formaldehyde, and relative humidity (RH) levels can also be used. CO2 sensors control the outside air damper to reduce the amount of outside air that needs to be conditioned and supplied to the building when

205

Cooling energy efficiency and classroom air environment of a school building operated by the heat recovery air conditioning unit  

Science Journals Connector (OSTI)

Abstract The recently-built school buildings have adopted novel heat recovery ventilator and air conditioning system. Heat recovery efficiency of the heat recovery facility and energy conservation ratio of the air conditioning unit were analytically modeled, taking the ventilation networks into account. Following that, school classroom displacement ventilation and its thermal stratification and indoor air quality indicated by the CO2 concentration have been numerically modeled concerning the effects of delivering ventilation flow rate and supplying air temperature. Numerical results indicate that the promotion of mechanical ventilation rate can simultaneously boost the dilution of indoor air pollutants and the non-uniformity of indoor thermal and pollutant distributions. Subsequent energy performance analysis demonstrates that classroom energy demands for ventilation and cooling could be reduced with the promotion of heat recovery efficiency of the ventilation facility, and the energy conservation ratio of the air conditioning unit decreases with the increasing temperatures of supplying air. Fitting correlations of heat recovery ventilation and cooling energy conservation have been presented.

Yang Wang; Fu-Yun Zhao; Jens Kuckelkorn; Di Liu; Li-Qun Liu; Xiao-Chuan Pan

2014-01-01T23:59:59.000Z

206

Ventilation System to Improve Savannah River Site's Liquid Waste...  

Broader source: Energy.gov (indexed) [DOE]

A process vessel ventilation system is being installed in a facility that houses two tanks that will process decontaminated salt solution at the Saltstone Production Facility. A...

207

Impact of Infiltration and Ventilation on Measured Space Conditioning...  

Energy Savers [EERE]

to provide needed ventilation under drier summer and winter conditions and reduce the air introduced during periods of peak space conditioning. For more information, see the...

208

Issue #9: What are the Best Ventilation Techniques?  

Broader source: Energy.gov [DOE]

How do we address ventilation in all climates? What is the best compromise between occupant health and safety and energy efficiency?

209

Summer Infiltration/Ventilation Test Results from the FRTF Laboratory  

Broader source: Energy.gov (indexed) [DOE]

Summer InfiltrationVentilation Test Results from the FRTF Laboratory Building America Technical Review Meeting April 29-30, 2013 A Research Institute of the University of Central...

210

Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements  

Broader source: Energy.gov [DOE]

This Building America webinar, held on Sept. 24, 2014, focused on key challenges in multifamily ventilation and strategies to address these challenges.

211

Impact of Infiltration and Ventilation on Measured Space Conditioning...  

Broader source: Energy.gov (indexed) [DOE]

Hot-humid PERFORMANCE DATA Costs for reducing infiltration and incorporating mechanical ventilation in buildings will vary greatly depending on the condition and...

212

Heat collector  

DOE Patents [OSTI]

A heat collector and method suitable for efficiently and cheaply collecting solar and other thermal energy are provided. The collector employs a heat pipe in a gravity-assist mode and is not evacuated. The collector has many advantages, some of which include ease of assembly, reduced structural stresses on the heat pipe enclosure, and a low total materials cost requirement. Natural convective forces drive the collector, which after startup operates entirely passively due in part to differences in molecular weights of gaseous components within the collector.

Merrigan, Michael A. (Santa Cruz, NM)

1984-01-01T23:59:59.000Z

213

Heat collector  

DOE Patents [OSTI]

A heat collector and method suitable for efficiently and cheaply collecting solar and other thermal energy are provided. The collector employs a heat pipe in a gravity-assist mode and is not evacuated. The collector has many advantages, some of which include ease of assembly, reduced structural stresses on the heat pipe enclosure, and a low total materials cost requirement. Natural convective forces drive the collector, which after startup operates entirely passively due in part to differences in molecular weights of gaseous components within the collector.

Merrigan, M.A.

1981-06-29T23:59:59.000Z

214

A Feasibility Study: Mining Daily Traces for Home Heating Control  

E-Print Network [OSTI]

savings as well as 14.9%­59.2% reduction in miss time. Keywords Energy, home heating, daily traces, prediction 1. INTRODUCTION Heating, ventilation and cooling (HVAC) contributes most to a home's energy bills, accounting for 48% of residential energy consumption in the U.S. and 61% in the U.K., 64% in Canada where

Whitehouse, Kamin

215

Role of Resolved and Parameterized Eddies in the Labrador Sea Balance of Heat and Buoyancy  

Science Journals Connector (OSTI)

Deep convection in the Labrador Sea is an important component of the global ocean ventilation. The associated loss of heat to the atmosphere from the interior of the sea is thought to be mostly supplied by mesoscale eddies, generated either ...

Oleg A. Saenko; Frédéric Dupont; Duo Yang; Paul G. Myers; Igor Yashayaev; Gregory C. Smith

2014-12-01T23:59:59.000Z

216

A Bench Study of Intensive Care Unit Ventilators: New versus Old and Turbine-Based versus Compressed Gas-Based Ventilators  

E-Print Network [OSTI]

. Material: Four turbine- based ventilators and nine conventional servo-valve compressed-gas ventilators were1 A Bench Study of Intensive Care Unit Ventilators: New versus Old and Turbine-Based versus Compressed Gas-Based Ventilators Arnaud W. Thille,1 MD; Aissam Lyazidi,1 Biomed Eng MS; Jean-Christophe M

Paris-Sud XI, Université de

217

LBNL-XXXXX | Logue et al., Evaluation of an Incremental Ventilation Energy Model for Estimating Impacts of Air Sealing and Mechanical Ventilation  

E-Print Network [OSTI]

Impacts of Air Sealing and Mechanical Ventilation 1 Evaluation of an Incremental Ventilation Energy Model for Estimating Impacts of Air Sealing and Mechanical Ventilation Jennifer M. Logue, William J. N for Estimating Impacts of Air Sealing and Mechanical Ventilation 2 Disclaimer This document was prepared

218

Results of the Evaluation Study DeAL Decentralized Facade Integrated Ventilation Systems  

E-Print Network [OSTI]

Most office buildings in Germany have either no mechanical ventilation system or a centralized ventilation system with fresh and exhaust air supply. Within the last 10 years some projects using decentralized ventilation systems (DVS) came up. Common...

Mahler, B.; Himmler, R.

219

Industrial Ventilation Statistics Confirm Energy Savings Opportunity  

E-Print Network [OSTI]

is based on installed on-demand ventilation systems, where sensors and PLC are installed with each system, so data is easily collected. Another critical factor for effective dust collecting is proper air velocities in duct system. Having measured air... of the cutting tool is active or not. Information from the sensor is transmitted to the Omron PLC. The Omron PLC saves data in binary form every 5 minutes (24/7) to the CompactFlash card (a similar card is used in digital cameras) along with the time...

Litomisky, A.

2006-01-01T23:59:59.000Z

220

An experimental investigation of an inclined passive wall solar chimney for natural ventilation  

Science Journals Connector (OSTI)

Abstract Ongoing investigations into solar chimney development have resulted in constantly evolving new designs. In this study, experiments are carried out with an inclined passive wall solar chimney (IPWSC) model with a uniform heat flux on the active (absorptive) wall. The effectiveness of this design has been examined for the heat flux range of 100 W/m2–500 W/m2 with a fixed base air gap width of 0.1 m and inclination angles of the passive wall in the range of 0–6 degrees. The experimental results show that the inclination angle of the passive wall has no significant effect on the temperature distribution across the air gap width and along the chimney height. On the other hand, the averaged air flow velocity across the air gap width is strongly affected by the inclination angle. The experimental results also show that the IPWSC with 0.7 m absorber height and 0.1 m air gap width at an inclination angle of 6° and input heat flux of 500 W/m2 can produce sufficient ventilation for a 27 m3 room based on ASHREA standards. Further, the present experimental results show that the IPWSC design can significantly improve the ventilation performance of a solar chimney in comparison to the conventional chimney design with vertical passive wall configuration. The experimental results are supported by flow visualization experiments and are consistent with scaling predictions.

Rakesh Khanal; Chengwang Lei

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Developing evidence-based prescriptive ventilation rate standards for commercial buildings in California: a proposed framework  

E-Print Network [OSTI]

control with ventilation, given current ventilation and filtration system practices, are the indoor-sourced gaseous pollutants with low octanal-air

Mendell, Mark J.

2014-01-01T23:59:59.000Z

222

Model of ventilation flows during large tunnel fires  

Science Journals Connector (OSTI)

In order to describe the reduction in the longitudinal airflow velocity due to the fire and hot gases resistances in a large tunnel fire, a theoretical model, taking into consideration the pressure losses over the fire source and obstructions, the thermal stack effects, and the hydraulic resistance induced by the tunnel walls, fire protection boards and a HGV trailer mock-up, is developed and validated using the large-scale tests data from the fire tests performed in the Runehamar tunnel with longitudinal ventilation in Norway 2003. Two large mobile fan units were used to create a longitudinal flow within the tunnel and prevent smoke backlayering upstream of the fire. One fan was located outside the entrance of the tunnel and the other inside the tunnel. The fire load consisted of a mock-up simulating a heavy goods vehicle (HGV) trailer creating a maximum heat release rates in the range of 66–202 MW. Two methods of calculating the mean temperature related to the thermal expansion and stack effect are proposed and compared.

Haukur Ingason; Anders Lönnermark; Ying Zhen Li

2012-01-01T23:59:59.000Z

223

Natural Ventilation Design for Houses in Thailand Chalermwat Tantasavasdia  

E-Print Network [OSTI]

This paper explores the potential of using natural ventilation as a passive cooling system for new house windows in suburban houses can be opened. Passive cooling design elements are mostly ignored in modern1 Natural Ventilation Design for Houses in Thailand Chalermwat Tantasavasdia , Jelena Srebricb

Chen, Qingyan "Yan"

224

Opaque Ventilated Facades - Performance Simulation Method and Assessment of  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Opaque Ventilated Facades - Performance Simulation Method and Assessment of Opaque Ventilated Facades - Performance Simulation Method and Assessment of Simulated Performance Speaker(s): Emanuele Naboni Date: May 29, 2007 - 12:00pm Location: 90-3122 Opaque ventilated façade systems are increasingly used in buildings, even though their effects on the overall thermal performance of buildings have not yet been fully understood. The research reported in this presentation focuses on the modeling of such systems with EnergyPlus. Ventilated façade systems are modeled in EnergyPlus with module "Exterior Naturally Vented Cavity." Not all façade systems can be modeled with this module; this research defined the types of systems that can be modeled, and the limitations of such simulation. The performance of a ventilated façade

225

Secondary pollutants from ozone reactions with ventilation filters and  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Secondary pollutants from ozone reactions with ventilation filters and Secondary pollutants from ozone reactions with ventilation filters and degradation of filter media additives Title Secondary pollutants from ozone reactions with ventilation filters and degradation of filter media additives Publication Type Journal Article Year of Publication 2011 Authors Destaillats, Hugo, Wenhao Chen, Michael G. Apte, Nuan Li, Michael Spears, Jérémie Almosni, Gregory Brunner, Jianshun(Jensen) Zhang, and William J. Fisk Journal Atmospheric Environment Volume 45 Start Page 3561 Issue 21 Pagination 3561-3568 Keywords commercial building ventilation & indoor environmental quality group, commercial building ventilation and indoor environmental quality group, energy analysis and environmental impacts department, indoor environment department, indoor environment group

226

Ventilation and Energy Saving in Auto Manufacturing Plants  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ventilation and Energy Saving in Auto Manufacturing Plants Ventilation and Energy Saving in Auto Manufacturing Plants Speaker(s): Alexander M. Zhivov Date: April 3, 2002 - 12:00pm Location: Bldg. 90 Dr. Alexander Zhivov is currently the chairman of the International Task Force "Autovent International" focusing on environmental problems within the Automotive Industry. This Task Force was formed in 1997 to develop the "Ventilation Guide for Automotive Industry". The guide was to be seen as a building block within the EU sponsored "Industrial Ventilation Design Guide Book" project, covering both theory and applications. In his presentation, Dr. Zhivov will talk about his work with the automotive industry, describe major highlights from the "Ventilation Guide for Automotive Industry" and talk about building, process and HVAC

227

Frequency domain and finite difference modeling of ventilated concrete slabs and comparison with field measurements: Part 1, modeling methodology  

Science Journals Connector (OSTI)

Abstract This paper is the first of two papers that focus on the thermal modeling of building-integrated thermal energy storage (BITES) systems using frequency response (FR) and lumped-parameter finite difference (LPFD) techniques. Structural/non-structural building fabric components, such as ventilated concrete slabs (VCS) can actively store and release thermal energy effectively by passing air through their embedded air channels. These building components can be described as ventilated BITES systems. To assist the thermal analysis and control of BITES systems, modeling techniques and guidelines for FR and LPFD models of VCS are presented in this two-part paper. In this first part, modeling techniques for FR and LPFD approaches based on network theory are presented. A method for calculating the heat transfer between flowing air and ventilated components is developed for these two approaches. Discretization criteria for explicit LPFD models are discussed. For the FR approach, discrete Fourier series in complex frequency form are used to represent the boundary excitations. In the treatment of heat injection from the flowing air as internal source in the VCS, network techniques such as Thévenin theorem, heat flow division, and Y-diakoptic transform are employed. The techniques presented in this paper are applicable to other BITES with hydronic or electric charging/discharging systems. With the FR techniques, model-based control strategies based on transfer functions can be readily developed.

Yuxiang Chen; Andreas K. Athienitis; Khaled E. Galal

2013-01-01T23:59:59.000Z

228

Ventilation System Effectiveness and Tested Indoor Air Quality Impacts  

SciTech Connect (OSTI)

Ventilation system effectiveness testing was conducted at two unoccupied, single-family, detached lab homes at the University of Texas - Tyler. Five ventilation system tests were conducted with various whole-building ventilation systems. Multizone fan pressurization testing characterized building and zone enclosure leakage. PFT testing showed multizone air change rates and interzonal airflow. Cumulative particle counts for six particle sizes, and formaldehyde and other Top 20 VOC concentrations were measured in multiple zones. The testing showed that single-point exhaust ventilation was inferior as a whole-house ventilation strategy. It was inferior because the source of outside air was not direct from outside, the ventilation air was not distributed, and no provision existed for air filtration. Indoor air recirculation by a central air distribution system can help improve the exhaust ventilation system by way of air mixing and filtration. In contrast, the supply and balanced ventilation systems showed that there is a significant benefit to drawing outside air from a known outside location, and filtering and distributing that air. Compared to the Exhaust systems, the CFIS and ERV systems showed better ventilation air distribution and lower concentrations of particulates, formaldehyde and other VOCs. System improvement percentages were estimated based on four System Factor Categories: Balance, Distribution, Outside Air Source, and Recirculation Filtration. Recommended System Factors could be applied to reduce ventilation fan airflow rates relative to ASHRAE Standard 62.2 to save energy and reduce moisture control risk in humid climates. HVAC energy savings were predicted to be 8-10%, or $50-$75/year.

Rudd, A.; Bergey, D.

2014-02-01T23:59:59.000Z

229

Heat Treating Apparatus  

DOE Patents [OSTI]

Apparatus for heat treating a heat treatable material including a housing having an upper opening for receiving a heat treatable material at a first temperature, a lower opening, and a chamber therebetween for heating the heat treatable material to a second temperature higher than the first temperature as the heat treatable material moves through the chamber from the upper to the lower opening. A gas supply assembly is operatively engaged to the housing at the lower opening, and includes a source of gas, a gas delivery assembly for delivering the gas through a plurality of pathways into the housing in countercurrent flow to movement of the heat treatable material, whereby the heat treatable material passes through the lower opening at the second temperature, and a control assembly for controlling conditions within the chamber to enable the heat treatable material to reach the second temperature and pass through the lower opening at the second temperature as a heated material.

De Saro, Robert (Annandale, NJ); Bateman, Willis (Sutton Colfield, GB)

2002-09-10T23:59:59.000Z

230

Microwave heating for adsorbents regeneration and oil sands coke activation.  

E-Print Network [OSTI]

??Microwave heating has unique advantages compared to convection-radiation heating methods including fast heating rate and selective heating of objects. This thesis studied two applications of… (more)

Chen, Heng

2010-01-01T23:59:59.000Z

231

Waste Heat Management Options for Improving Industrial Process...  

Broader source: Energy.gov (indexed) [DOE]

of waste heat streams, and options for recovery including Combined Heat and Power. Waste Heat Management Options for Improving Industrial Process Heating Systems...

232

Extension of the semi-empirical correlation for the effects of pipe diameter and internal surface roughness on the decompression wave speed to include High Heating Value Processed Gas mixtures  

Science Journals Connector (OSTI)

Abstract The decompression wave speed, which is used throughout the pipeline industry in connection with the Battelle two-curve method for the control of propagating ductile fracture, is typically calculated using GASDECOM (GAS DECOMpression). GASDECOM, developed in the 1970's, idealizes the decompression process as isentropic and one-dimensional, taking no account of pipe wall frictional effects or pipe diameter. Previous shock tube tests showed that decompression wave speeds in smaller diameter and rough pipes are consistently slower than those predicted by GASDECOM for the same conditions of mixture composition and initial pressure and temperature. Previous analysis based on perturbation theory and the fundamental momentum equation revealed a correction term to be subtracted from the ‘idealized’ value of the decompression speed calculated by GASDECOM. One parameter in this correction term involves a dynamic spatial pressure gradient of the outflow at the rupture location. While this is difficult to obtain without a shock tube or actual rupture test, data from 14 shock tube tests, as well as from 14 full scale burst tests involving a variety of gas mixture compositions, were analyzed to correlate the variation of this pressure gradient with two characteristics of the gas mixture, namely; the molecular weight and the higher heating value (HHV). For lean to moderately-rich gas mixes, the developed semi-empirical correlation was found to fit very well the experimentally determined decompression wave speed curve. For extremely rich gas mixes, such as High Heating Value Processed Gas (HHVPG) mixtures of HHV up to 58 MJ/m3, it was found that it overestimates the correction term. Therefore, additional shock tube tests were conducted on (HHVPG) mixes, and the previously developed semi-empirical correlation was extended (revised) to account for such extremity in the richness of the gas mixtures. The newly developed semi-empirical correlation covers a wider range of natural gas mixtures from as lean as pure methane up to HHVPG mixtures of HHV = 58 MJ/m3.

K.K. Botros; L. Carlson; M. Reed

2013-01-01T23:59:59.000Z

233

Impact of Infiltration and Ventilation on Measured Space Conditioning Energy and Moisture Levels in the Hot-Humid Climate, Cocoa, Florida (Fact Sheet)  

SciTech Connect (OSTI)

Air infiltration and ventilation in residential buildings is a very large part of the heating loads, but empirical data regarding the impact on space cooling has been lacking. Moreover, there has been little data on how building tightness might relate to building interior moisture levels in homes in a hot and humid climate. To address this need, BA-PIRC has conducted research to assess the moisture and cooling load impacts of airtightness and mechanical ventilation in two identical laboratory homes in the hot-humid climate over the cooling season. ?

Not Available

2014-04-01T23:59:59.000Z

234

Recovering Energy From Ventilation and Process Airstreams  

E-Print Network [OSTI]

. Heat is transferred from the hot to the cold airstreams as the two move through the plate-type device. Heat can be recovered from exhaust air by using one of these three systems: process to-process, process-to-comfort, and comfort to... between surfaces. One excellent application for a high latent heat recovery device is used in the textile industry. Slide 5 shows air-to liquid plate-type heat exchangers used in a carpet mill to recover energy from hot, .moist exhaust air...

Cheney, W. A.

235

Kitchen Ventilation Should be High Performance (Not Optional)  

Broader source: Energy.gov (indexed) [DOE]

Kitchen Ventilation Kitchen Ventilation Should be High Performance (not Optional) Brett C. Singer Residential Building Systems & Indoor Environment Groups Lawrence Berkeley National Laboratory Building America Technical Update Denver, CO April 30, 2013 Acknowledgements PROGRAM SUPPORT *U.S. Department of Energy - Building America Program *U.S. Environmental Protection Agency - Indoor Environments Division *U.S. Department of Housing and Urban Development - Office of Healthy Homes & Lead Hazard Control *California Energy Commission - Public Interest Energy Research Program TECHNICAL CONTRIBUTIONS *Woody Delp, Tosh Hotchi, Melissa Lunden, Nasim Mullen, Chris Stratton, Doug Sullivan, Iain Walker Kitchen Ventilation Simplified PROBLEM: * Cooking burners & cooking produce odors, moisture

236

Experiments to Evaluate and Implement Passive Tracer Gas Methods to Measure Ventilation Rates in Homes  

E-Print Network [OSTI]

Pollutant Control Index: A New Method of Characterizing Ventilation in Commercial Buildings." Proceedings of Indoor Air'

Lunden, Melissa

2014-01-01T23:59:59.000Z

237

Text-Alternative Version of Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements  

Broader source: Energy.gov [DOE]

Transcript of Building America webinar, "Multifamily Ventilation Strategies and Compartmentalization Requirements," held on Sept. 24, 2014.

238

Experimental and numerical VOC concentration field analysis from flooring material in a ventilated room  

E-Print Network [OSTI]

in "7th International Conference, Healthy Buildings 2003, Singapore : Singapore (2003)" #12;Ventilation

Paris-Sud XI, Université de

239

Solar space heating | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Solar space heating (Redirected from - Solar Ventilation Preheat) Jump to: navigation, search (The following text is derived from the United States Department of Energy's description of solar space heating technology.)[1] Contents 1 Space Heating 2 Passive Solar Space Heating 3 Active Solar Space Heating 4 References Space Heating A solar space-heating system can consist of a passive system, an active system, or a combination of both. Passive systems are typically less costly and less complex than active systems. However, when retrofitting a building, active systems might be the only option for obtaining solar

240

A Prototype Roof Deck Designed to Self-Regulate Deck Temperature and Reduce Heat Transfer  

SciTech Connect (OSTI)

A prototype roof and attic assembly exploits the use of radiation, convection and insulation controls to reduce the heat transfer penetrating its roof deck by almost 85% of the heat transfer crossing a conventional roof and attic assembly. The assembly exhibited attic air temperatures that did not exceed the peak day outdoor ambient temperature. The design includes a passive ventilation scheme that pulls air from the soffit and attic into an inclined air space above the deck. The design complies with fire protection codes because the air intake is internal and closed to the elements. Field data were benchmarked against an attic computer tool and simulations made for new and retrofit home constructions in hot, moderate and cold climates to access economics for the assembly.

Miller, William A [ORNL] [ORNL

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

A Prototype Roof Deck Designed to Self-Regulate Deck Temperature and Reduce Heat Transfer  

SciTech Connect (OSTI)

A prototype roof and attic assembly exploits the use of radiation, convection and insulation controls to reduce its peak day heat transfer by almost 85 percent of the heat transfer crossing a conventional roof and attic assembly. The assembly exhibits attic air temperatures that do not exceed the maximum daily outdoor ambient temperature. The design includes a passive ventilation scheme that pulls air from the soffit and attic into an inclined air space above the roof deck. The design complies with fire protection codes because the air intake is internal and closed to the elements. Field data were benchmarked against an attic computer tool and simulations made for new and retrofit constructions in hot, moderate and cold climates to gauge the cost of energy savings and potential payback.

Miller, William A [ORNL] [ORNL

2011-01-01T23:59:59.000Z

242

MassSAVE - HEAT Loan Program | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

MassSAVE - HEAT Loan Program MassSAVE - HEAT Loan Program MassSAVE - HEAT Loan Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Sealing Your Home Ventilation Heat Pumps Appliances & Electronics Water Heating Windows, Doors, & Skylights Solar Maximum Rebate $25,000 Program Info State Massachusetts Program Type Utility Loan Program Rebate Amount HEAT (Micro Loan): $500 - $2,000 Heat (1-4 Unit, Owner Occupied): $2,000 - $25,000 Heat (1-4 Unit, Non-owner Occupied): $5,000 - $25,000 Provider MassSAVE Residential customers of Cape Light Compact, National Grid, NSTAR, Unitil and Western Massachusetts Electric Company may be eligible for zero-interest financing to help increase the energy efficiency of their

243

Analyzing Ventilation Effects of Different Apartment Styles by CFD  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China Renewable Renewable Energy Resources and a Greener Future Vol.VIII-3-5 Analyzing Ventilation Effects of Different Apartment Styles by CFD Xiaodong Li Lina Wang Zhixing Ye Associate Professor School...

Li, X.; Wang, L.; Ye, Z.

2006-01-01T23:59:59.000Z

244

Key Factors in Displacement Ventilation Systems for Better IAQ  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China Maximize Comfort: Temperature, Humidity and IAQ Vol.I-7-2 Key Factors in Displacement Ventilation Systems for Better IAQ1 Xiaotong Wang Junjun Chen Yike Li Zhiwei Wang Associate Professor...

Wang, X.; Chen, J.; Li, Y.; Wang, Z.

2006-01-01T23:59:59.000Z

245

Comparison of Two Ventilation Systems in a Chinese Commercial Kitchen  

E-Print Network [OSTI]

A numerical simulation of an indoor thermal environment in a Chinese commercial kitchen has been carried out using indoor zero-equation turbulence model. Two different ventilation systems in a Chinese commercial kitchen have been simulated...

Wan, X.; Yu, L.; Hou, H.

2006-01-01T23:59:59.000Z

246

Natural ventilation in buildings : modeling, control and optimization  

E-Print Network [OSTI]

Natural ventilation in buildings has the potential to reduce the energy consumption usually associated with mechanical cooling while maintaining thermal comfort and air quality. It is important to know how building parameters, ...

Ip Kiun Chong, Karine

2014-01-01T23:59:59.000Z

247

Numerical Analysis of the Channel Wheel Fresh Air Ventilator Under Frosting Conditions  

E-Print Network [OSTI]

channel wheel heat exchanger under different ambient conditions using the model developed. These include frost formation on the surface of the channel wheel heat exchanger, and impacts on the operational performance of the channel wheel fresh air...

Gao, B.; Dong, Z.; Cheng, Z.; Luo, E.

2006-01-01T23:59:59.000Z

248

Study on Influencing Factors of Night Ventilation in Office Rooms  

E-Print Network [OSTI]

& Environmental Engineering, Harbin Institute of Technology Harbin P.R.China, 150090 wzjw02@yahoo.com.cn Abstract: A mathematical and physical model on night ventilation is set up. The fields of indoor air temperature, air velocity and thermal comfort... & Environmental Engineering, Harbin Institute of Technology Harbin P.R.China, 150090 wzjw02@yahoo.com.cn Abstract: A mathematical and physical model on night ventilation is set up. The fields of indoor air temperature, air velocity and thermal comfort...

Wang, Z.; Sun, X.

2006-01-01T23:59:59.000Z

249

Pump apparatus including deconsolidator  

DOE Patents [OSTI]

A pump apparatus includes a particulate pump that defines a passage that extends from an inlet to an outlet. A duct is in flow communication with the outlet. The duct includes a deconsolidator configured to fragment particle agglomerates received from the passage.

Sonwane, Chandrashekhar; Saunders, Timothy; Fitzsimmons, Mark Andrew

2014-10-07T23:59:59.000Z

250

Heat Pumps | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Heat Pumps Heat Pumps Heat Pumps Geothermal heat pumps are expensive to install but pay for themselves over time in reduced heating and cooling costs. Learn more about how geothermal heat pumps heat and cool buildings by concentrating the naturally existing heat contained within the earth -- a clean, reliable, and renewable source of energy. In moderate climates, heat pumps can be an energy-efficient alternative to furnaces and air conditioners. Several types of heat pumps are available, including air-source; geothermal; ductless, mini-split; and absorption heat pumps. Learn more about the different options and how to use your heat pump efficiently to save money and energy at home. Featured Heat Pump Systems A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar.

251

HVAC Radial Air Bearing Heat Exchangers Research Project | Department of  

Broader source: Energy.gov (indexed) [DOE]

Radial Air Bearing Heat Exchangers Radial Air Bearing Heat Exchangers Research Project HVAC Radial Air Bearing Heat Exchangers Research Project The U.S. Department of Energy is currently conducting research into heating, ventilation, and air conditioning (HVAC) radial air bearing heat exchangers. Rotary air bearing heat exchanger technology simultaneously solves four long standing problems of conventional "fan-plus-finned-heat-sink" heat exchangers. Project Description This project seeks to design, fabricate, and test successive generations of prototype radial air bearing heat exchanger devices based on lessons learned and further insights into device optimization, computational fluid dynamic studies for parametric optimization and determination of scaling laws, and laboratory measurement of flow field and heat transfer

252

Waste Heat Recovery from Industrial Process Heating Equipment -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Waste Heat Recovery from Industrial Process Heating Equipment - Waste Heat Recovery from Industrial Process Heating Equipment - Cross-cutting Research and Development Priorities Speaker(s): Sachin Nimbalkar Date: January 17, 2013 - 11:00am Location: 90-2063 Seminar Host/Point of Contact: Aimee McKane Waste heat is generated from several industrial systems used in manufacturing. The waste heat sources are distributed throughout a plant. The largest source for most industries is exhaust / flue gases or heated air from heating systems. This includes the high temperature gases from burners in process heating, lower temperature gases from heat treat, dryers, and heaters, heat from heat exchangers, cooling liquids and gases etc. The previous studies and direct contact with the industry as well as equipment suppliers have shown that a large amount of waste heat is not

253

[Waste water heat recovery system  

SciTech Connect (OSTI)

The production capabilities for and field testing of the heat recovery system are described briefly. Drawings are included.

Not Available

1993-04-28T23:59:59.000Z

254

Performance Assessment of Photovoltaic Attic Ventilator Fans  

E-Print Network [OSTI]

. However, when ducts are present in the attic, the magnitude of heat gain to the thermal distribution system under peak conditions can be often much greater than the ceiling heat flux in well-insulated attics (Parker et al.. 1993; Hageman and Modera... this fact Assume a 2,000 square foot ceiling with R-30 attic insulation. Supply ducts in most residences often comprise a combined area of -25% of the gross floor area (see Gu et al. 1997, Appendix G. and Jump and Modera. 1994). but are only insulated...

Parker, D. S.; Sherwin, J. R.

2000-01-01T23:59:59.000Z

255

Healthy Zero Energy Buildings (HZEB) Program - Cross-Sectional Study of Contaminant Levels, Source, Strengths, and Ventilation Rates in Retail Stores  

SciTech Connect (OSTI)

This field study measured ventilation rates and indoor air quality parameters in 21 visits to retail stores in California. The data was collected to guide the development of new, science-based commercial building ventilation rate standards that balance the dual objectives of increasing energy efficiency and maintaining acceptable indoor air quality. Data collection occurred between September 2011 and March 2013. Three types of stores participated in this study: grocery stores, furniture/hardware stores, and apparel stores. Ventilation rates and indoor air contaminant concentrations were measured on a weekday, typically between 9 am and 6 pm. Ventilation rates measured using a tracer gas decay method exceeded the minimum requirement of California’s Title 24 Standard in all but one store. Even though there was adequate ventilation according to Title 24, concentrations of formaldehyde, acetaldehyde, and acrolein exceeded the most stringent chronic health guidelines. Other indoor air contaminants measured included carbon dioxide (CO{sub 2}), carbon monoxide (CO), ozone (O{sub 3}), and particulate matter (PM). Concentrations of CO{sub 2} were kept low by adequate ventilation, and were assumed low also because the sampling occurred on a weekday when retail stores were less busy. CO concentrations were also low. The indoor-outdoor ratios of O{sub 3} showed that the first-order loss rate may vary by store trade types and also by ventilation mode (mechanical versus natural). Analysis of fine and ultrafine PM measurements showed that a substantial portion of the particle mass in grocery stores with cooking-related emissions was in particles less than 0.3 ?m. Stores without cooking as an indoor source had PM size distributions that were more similar indoors and outdoors. The whole-building emission rates of volatile organic compounds (VOCs) and PM were estimated from the measured ventilation rates and indoor and outdoor contaminant concentrations. Mass balance models were then used to determine the ventilation rates, filtration strategies, or source reductions needed to maintain indoor contaminant concentrations below reference levels. Several scenarios of potential concern were considered: (i) formaldehyde levels in furniture/hardware stores, (ii) contaminants associated with cooking (e.g., PM, acrolein, and acetaldehyde) in grocery stores, and (iii) outdoor contaminants (e.g., PM and O{sub 3}) impacting stores that use natural ventilation. Estimated formaldehyde emission rates suggest that retail stores would need to ventilate at levels far exceeding the current Title 24 requirement to lower indoor concentrations below California’s stringent formaldehyde reference level. Given the high costs of providing ventilation but only modest chronic health benefit is expected, effective source control is an attractive alternative, as demonstrated by some retail stores in this study. Predictions showed that grocery stores need MERV 13 air filters, instead of MERV 8 filters that are more commonly used, to maintain indoor PM at levels that meet the chronic health standards for PM. Exposure to acrolein is a potential health concern in grocery stores, and should be addressed by increasing the use of kitchen range hoods or improving their contaminant removal efficiency. In stores that rely on natural ventilation, indoor PM can be a health concern if the stores are located in areas with high outdoor PM. This concern may be addressed by switching to mechanical ventilation when the outdoor air quality is poor, while continuing natural ventilation when outdoor air quality is good.

Chan, Wanyu R.; Sidheswaran, Meera; Cohn, Sebastian; Sullivan, Douglas P.; Fisk, William

2014-02-01T23:59:59.000Z

256

Trends in Heating and Cooling Degree Days: Implications for Energy Demand Issues (released in AEO2008)  

Reports and Publications (EIA)

Weather-related energy use, in the form of heating, cooling, and ventilation, accounted for more than 40% of all delivered energy use in residential and commercial buildings in 2006. Given the relatively large amount of energy affected by ambient temperature in the buildings sector, the Energy Information Administration has reevaluated what it considers normal weather for purposes of projecting future energy use for heating, cooling, and ventilation. The Annual Energy Outlook 2008, estimates of normal heating and cooling degree-days are based on the population-weighted average for the 10-year period from 1997 through 2006.

2008-01-01T23:59:59.000Z

257

Phase-change wallboard and mechanical night ventilation in commercial buildings: Potential for HVAC system downsizing  

SciTech Connect (OSTI)

As thermal storage media, phase-change materials (PCMs) such as paraffin, eutectic salts, etc. offer an order-of-magnitude increase in thermal storage capacity, and their discharge is almost isothermal. By embedding PCMs in dypsum board, plaster, or other wall-covering materials, the building structure acquires latent storage properties. Structural elements containing PCMs can store large amounts of energy while maintaining the indoor temperature within a relatively narrow range. As heat storage takes place inside the building where the loads occur, rather than at a central exterior location, the internal loads are removed without the need for additional transport energy. Distributed latent storage can thus be used to reduce the peak power demand of a building, downsize the cooling system, and/or switch to low-energy cooling sources. The authors used RADCOOL, a thermal building simulation program based on the finite difference approach, to numerically evaluate the thermal performance of PCM wallboard coupled with mechanical night ventilation in office buildings offers the opportunity for system downsizing in climates where the outside air temperature drops below 18 C at night. In climates where the outside air temperature remains above 19 C at night, the use of PCM wallboard should be coupled with discharge mechanisms other than mechanical night ventilation with outside air.

Stetiu, C.; Feustel, H.E.

1998-07-01T23:59:59.000Z

258

Microsoft Word - Evaluation of an Incremental Ventilation Energy Model for Estimating Impacts of Air Sealing and Mechanical Ventilation_Final2.docx  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

XXXXX | Logue et al., Evaluation of an Incremental Ventilation Energy Model for Estimating XXXXX | Logue et al., Evaluation of an Incremental Ventilation Energy Model for Estimating Impacts of Air Sealing and Mechanical Ventilation 1 Evaluation of an Incremental Ventilation Energy Model for Estimating Impacts of Air Sealing and Mechanical Ventilation Jennifer M. Logue, William J. N. Turner, Iain S. Walker, and Brett C. Singer Environmental Energy Technologies Division June 2012 LBNL-5796E LBNL-XXXXX | Logue et al., Evaluation of an Incremental Ventilation Energy Model for Estimating Impacts of Air Sealing and Mechanical Ventilation 2 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 California, nor

259

Commissioning Residential Ventilation Systems: A Combined Assessment of  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Commissioning Residential Ventilation Systems: A Combined Assessment of Commissioning Residential Ventilation Systems: A Combined Assessment of Energy and Air Quality Potential Values Title Commissioning Residential Ventilation Systems: A Combined Assessment of Energy and Air Quality Potential Values Publication Type Report LBNL Report Number LBNL-5969E Year of Publication 2012 Authors Turner, William J. N., Jennifer M. Logue, and Craig P. Wray Date Published 07/2012 Keywords commissioning, energy, health, indoor air quality, residential, valuation, ventilation Abstract Due to changes in building codes, whole-house mechanical ventilation systems are being installed in new California homes. Few measurements are available, but the limited data suggest that these systems don't always perform as code and forecasts predict. Such deficiencies occur because systems are usually field assembled without design specifications, and there is no consistent process to identify and correct problems. The value of such activities in terms of reducing energy use and improving indoor air quality (IAQ) is poorly understood. Commissioning such systems when they are installed or during subsequent building retrofits is a step towards eliminating deficiencies and optimizing the tradeoff between energy use and IAQ.

260

Ventilation Behavior and Household Characteristics in NewCalifornia Houses  

SciTech Connect (OSTI)

A survey was conducted to determine occupant use of windows and mechanical ventilation devices; barriers that inhibit their use; satisfaction with indoor air quality (IAQ); and the relationship between these factors. A questionnaire was mailed to a stratified random sample of 4,972 single-family detached homes built in 2003, and 1,448 responses were received. A convenience sample of 230 houses known to have mechanical ventilation systems resulted in another 67 completed interviews. Some results are: (1) Many houses are under-ventilated: depending on season, only 10-50% of houses meet the standard recommendation of 0.35 air changes per hour. (2) Local exhaust fans are under-utilized. For instance, about 30% of households rarely or never use their bathroom fan. (3) More than 95% of households report that indoor air quality is ''very'' or ''somewhat'' acceptable, although about 1/3 of households also report dustiness, dry air, or stagnant or humid air. (4) Except households where people cook several hours per week, there is no evidence that households with significant indoor pollutant sources get more ventilation. (5) Except households containing asthmatics, there is no evidence that health issues motivate ventilation behavior. (6) Security and energy saving are the two main reasons people close windows or keep them closed.

Price, Phillip N.; Sherman, Max H.

2006-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Indoor air environment and night cooling energy efficiency of a southern German passive public school building operated by the heat recovery air conditioning unit  

Science Journals Connector (OSTI)

Abstract The recently built school building has adopted a novel heat recovery air conditioning system. Heat recovery efficiency of the heat recovery facility and energy conservation ratio of the air conditioning unit were analytically modeled, taking the ventilation networks into account. Following that, school classroom displacement ventilation and its thermal stratification have been numerically investigated concerning the effects of the heat flow flux of passive cooling within the ceiling concrete in the classroom due to night ventilation in summer which could result in cooling energy storage. Numerical results indicate that the promotion of passive cooling can simultaneously decrease the volume averaged indoor temperatures and the non-uniformity of indoor thermal distributions. Subsequent energy performance analysis demonstrates that classroom energy demands for ventilation and cooling could be reduced with the promotion of heat recovery efficiency of the ventilation facility, and the energy conservation ratio of the air-cooling unit decreases with the increasing temperatures of exhaust air and the heat flux value for passive cooling within the classroom ceiling concrete. Fitting correlations of heat recovery ventilation and cooling energy conservation have been presented.

Yang Wang; Fu-Yun Zhao; Jens Kuckelkorn; Xiao-Hong Li; Han-Qing Wang

2014-01-01T23:59:59.000Z

262

2014-04-28 Issuance: Certification of Commercial HVAC, Water Heating, and Refrigeration Equipment; Final Rule  

Broader source: Energy.gov [DOE]

This document is a pre-publication Federal Register final rule regarding the certification of commercial heating, ventilation, and air-conditioning (HVAC), water heating (WH), and refrigeration (CRE) equipment, as issued by the Deputy Assistant Secretary for Energy Efficiency on April 28, 2014.

263

Results from evaporation tests to support the MWTF heat removal system design  

SciTech Connect (OSTI)

An experimental tests program was conducted to measure the evaporative heat removal from the surface of a tank of simulated waste. The results contained in this report constitute definition design data for the latest heat removal function of the MWTF primary ventilation system.

Crea, B.A.

1994-12-22T23:59:59.000Z

264

PreHeat: Controlling Home Heating Using Occupancy Prediction  

E-Print Network [OSTI]

@comp.lancs.ac.uk ABSTRACT Home heating is a major factor in worldwide energy use. Our system, PreHeat, aims to more, and measuring actual gas consumption and occupancy. In UK homes PreHeat both saved gas and reduced MissTime (the Home heating uses more energy than any other residential energy expenditure including air conditioning

Krumm, John

265

Reducing Mortality from Terrorist Releases of Chemical and Biological Agents: I. Filtration for Ventilation Systems in Commercial Building  

SciTech Connect (OSTI)

There is growing concern about potential terrorist attacks involving releases of chemical and/or biological (CB) agents, such as sarin or anthrax, in and around buildings. For an external release, the CB agent can enter the building through the air intakes of a building's mechanical ventilation system and by infiltration through the building envelope. For an interior release in a single room, the mechanical ventilation system, which often recirculates some fraction of the air within a building, may distribute the released CB agent throughout the building. For both cases, installing building systems that remove chemical and biological agents may be the most effective way to protect building occupants. Filtration systems installed in the heating, ventilating and air-conditioning (HVAC) systems of buildings can significantly reduce exposures of building occupants in the event of a release, whether the release is outdoors or indoors. Reduced exposures can reduce the number of deaths from a terrorist attack. The purpose of this report is to provide information and examples of the design of filtration systems to help building engineers retrofit HVAC systems. The report also provides background information on the physical nature of CB agents and brief overviews of the basic principles of particle and vapor filtration.

Thatcher, Tracy L.; Daisey, Joan M.

1999-09-01T23:59:59.000Z

266

Heat pump having improved defrost system  

DOE Patents [OSTI]

A heat pump system includes, in an operable relationship for transferring heat between an exterior atmosphere and an interior atmosphere via a fluid refrigerant: a compressor; an interior heat exchanger; an exterior heat exchanger; an accumulator; and means for heating the accumulator in order to defrost the exterior heat exchanger. 2 figs.

Chen, F.C.; Mei, V.C.; Murphy, R.W.

1998-12-08T23:59:59.000Z

267

Low Energy Buildings: CFD Techniques for Natural Ventilation and Thermal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Low Energy Buildings: CFD Techniques for Natural Ventilation and Thermal Low Energy Buildings: CFD Techniques for Natural Ventilation and Thermal Comfort Prediction Speaker(s): Malcolm Cook Date: February 14, 2013 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Michael Wetter Malcolm's presentation will cover both his research and consultancy activities. This will cover the work he has undertaken during his time spent working with architects on low energy building design, with a particular focus on natural ventilation and passive cooling strategies, and the role computer simulation can play in this design process. Malcolm will talk about the simulation techniques employed, as well as the innovative passive design principles that have led to some of the UK's most energy efficient buildings. In addition to UK building projects, the talk will

268

Building Air Quality & Ventilation Models: Review - Evaluation - Proposals  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Building Air Quality & Ventilation Models: Review - Evaluation - Proposals Building Air Quality & Ventilation Models: Review - Evaluation - Proposals Speaker(s): James Axley Date: March 12, 1999 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Richard Sextro Developments in mathematical models for building air quality and ventilation analysis have changed the way we idealize buildings for purposes of analysis, the way we form system equations to effect the analysis, and the way we solve these equations to realize the analysis. While much has been achieved more is possible. This presentation will review the current state of the art - the building idealizations used, the system equations formed, and the solution methods applied - critically evaluate the completeness, complexity and utility of the most advanced models, and present proposals for future development

269

Capture and Use of Coal Mine Ventilation-Air Methane  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Capture and use of Coal Mine Capture and use of Coal Mine Ventilation - air Methane Background Methane emissions from coal mines represent about 10 percent of the U.S. anthropogenic methane released to the atmosphere. Methane-the second most important non-water greenhouse gas-is 21 times as powerful as carbon dioxide (CO 2 ) in its global warming potential. Ventilation-air methane (VAM)-the exhaust air from underground coal mines-is the largest source of coal mine methane, accounting for about half of the methane emitted from coal mines in the United States. Unfortunately, because of the low methane concentration (0.3-1.5 percent) in ventilation air, its beneficial use is difficult. However, oxidizing the methane to CO 2 and water reduces its global warming potential by 87 percent. A thermal

270

Formaldehyde emissions from ventilation filters under different relative  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Formaldehyde emissions from ventilation filters under different relative Formaldehyde emissions from ventilation filters under different relative humidity conditions Title Formaldehyde emissions from ventilation filters under different relative humidity conditions Publication Type Journal Article Refereed Designation Refereed Year of Publication 2013 Authors Sidheswaran, Meera A., Wenhao Chen, Agatha Chang, Robert Miller, Sebastian Cohn, Douglas P. Sullivan, William J. Fisk, Kazukiyo Kumagai, and Hugo Destaillats Journal Environmental Science and Technology Date Published 04/18/2013 Abstract A method combining life cycle assessment (LCA) and real options analyses is developed to predict project environmental and financial performance over time, under market uncertainties and decision-making flexibility. The method is applied to examine alternative uses for oil sands coke, a carbonaceous byproduct of processing the unconventional petroleum found in northern Alberta, Canada. Under uncertainties in natural gas price and the imposition of a carbon price, our method identifies that selling the coke to China for electricity generation by integrated gasification combined cycle is

271

CO 2 - Based Demand-Controlled Ventilation Control Strategies for Multi-Zone HVAC Systems  

E-Print Network [OSTI]

CO 2-based demand-controlled ventilation DCV strategy offers a great opportunity to reduce energy consumption in HVAC systems while providing the required ventilation. However, implementing CO 2-based DCV under ASHRAE 62.1.2004 through 2010...

Nassif, N.

2011-01-01T23:59:59.000Z

272

ASHRAE's Residential Ventilation Standard: Exegesis of Proposed Standard 62.2  

E-Print Network [OSTI]

In February 2000, ASHRAE's Standard Project Committee on "Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings", SPC 62.2P7 recommended ASHRAE's first complete standard on residential ventilation for public review...

Sherman, M.

2000-01-01T23:59:59.000Z

273

Design and prototyping of a low-cost portable mechanical ventilator  

E-Print Network [OSTI]

This paper describes the design and prototyping of a low-cost portable mechanical ventilator for use in mass casualty cases and resource-poor environments. The ventilator delivers breaths by compressing a conventional ...

Powelson, Stephen K. (Stephen Kirby)

2010-01-01T23:59:59.000Z

274

A sweating model for the internal ventilation of a motorcycle Claudio Canutoa  

E-Print Network [OSTI]

A sweating model for the internal ventilation of a motorcycle helmet Claudio Canutoa , Flavio and optimization of the internal ventilation of a motorcycle hel- met, with the purpose of enhancing the comfort

Ceragioli, Francesca

275

Heat pump system  

DOE Patents [OSTI]

An air heating and cooling system for a building includes an expansion type refrigeration circuit and a vapor power circuit. The refrigeration circuit includes two heat exchangers, one of which is communicated with a source of indoor air from the building and the other of which is communicated with a source of air from outside the building. The vapor power circuit includes two heat exchangers, one of which is disposed in series air flow relationship with the indoor refrigeration circuit heat exchanger and the other of which is disposed in series air flow relationship with the outdoor refrigeration circuit heat exchanger. Fans powered by electricity generated by a vapor power circuit alternator circulate indoor air through the two indoor heat exchangers and circulate outside air through the two outdoor heat exchangers. The system is assembled as a single roof top unit, with a vapor power generator and turbine and compressor thermally insulated from the heat exchangers, and with the indoor heat exchangers thermally insulated from the outdoor heat exchangers.

Swenson, Paul F. (Shaker Heights, OH); Moore, Paul B. (Fedhaven, FL)

1983-01-01T23:59:59.000Z

276

Air flow and particle control with different ventilation systems in a classroom  

E-Print Network [OSTI]

Air flow and particle control with different ventilation systems in a classroom Sture Holmberg, Ph. For displacement ventilation systems, designers normally assume that all pollutants follow the buoyant air flow of the ventilation air flow are shown to play an important role in the control of air quality. Computer simulation

Chen, Qingyan "Yan"

277

HVAC Optimized Heat Exchangers Research Project | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Optimized Heat Exchangers Research Optimized Heat Exchangers Research Project HVAC Optimized Heat Exchangers Research Project The U.S. Department of Energy is currently conducting research into heating, ventilation, and air conditioning (HVAC) optimized heat exchangers. The information generated in this study will demonstrate performance improvements that can be achieved through optimization of refrigerant circuitry for non-uniform inlet air distribution. The tubing circuitry on fin-tube heat exchangers used in residential space-conditioning systems is typically designed assuming uniform airflow through the finned passageways. However, the air flow in installed systems is highly non-uniform, resulting in mismatched refrigerant-air heat transfer that reduces the capacity of the heat exchanger and efficiency of

278

Hottest spot temperatures in ventilated dry type transformers  

SciTech Connect (OSTI)

The hottest spot temperature allowance to be used for the different insulation system temperature classes is a major unknown facing IEEE Working Groups developing standards and loading guides for ventilated dry type transformers. In 1944, the hottest spot temperature allowance for ventilated dry type transformers was established as 30 C for 80 C average winding temperature rise. Since 1944, insulation temperature classes have increased to 220 C but IEEE standards continue to use a constant 30 C hottest spot temperature allowance. IEC standards use a variable hottest spot temperature allowance from 5 to 30 C. Six full size test windings were manufactured with imbedded thermocouples and 133 test runs performed to obtain temperature rise data. The test data indicated that the hottest spot temperature allowance used in IEEE standards for ventilated dry type transformers above 500 kVA is too low. This is due to the large thermal gradient from the bottom to the top of the windings caused by natural convection air flow through the cooling ducts. A constant ratio of hottest spot winding temperature rise to average winding temperature rise should be used in product standards for all insulation temperature classes. A ratio of 1.5 is suggested for ventilated dry type transformers above 500 kVA. This would increase the hottest spot temperature allowance from 30 C to 60 C and decrease the permissible average winding temperature rise from 150 C to 120 C for the 220 C insulation temperature class.

Pierce, L.W. (General Electric Co., Rome, GA (United States))

1994-01-01T23:59:59.000Z

279

Utilizing Passive Ventilation to Complement HVAC Systems in Enclosed Buildings  

E-Print Network [OSTI]

Utilizing Passive Ventilation to Complement HVAC Systems in Enclosed Buildings Tom Rogg REU Student to assist HVAC has the potential to significantly reduce life cycle cost and energy consumption and electrical system that will tie thermostats to controlled valves in the actual HVAC system. Based on results

Mountziaris, T. J.

280

Control of airborne infectious diseases in ventilated spaces  

Science Journals Connector (OSTI)

...Refrigerating and Air-Conditioning Engineers. Badeau, A. , A. Afshari, T. Goldsmith...control of SARS virus aerosols in indoor environment-transmission routes and ward ventilation...transmission of infectious agents in the built environment-a multidisciplinary systematic review...

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Experimental analysis and model validation of an opaque ventilated facade  

Science Journals Connector (OSTI)

Natural ventilation is a convenient way of reducing energy consumption in buildings. In this study an experimental module of an opaque ventilated façade (OVF) was built and tested for assessing its potential of supplying free ventilation and air preheating for the building. A numerical model was created and validated against the experimental data. The experimental results showed that the flow rates induced in the façade cavity were due to mixed driving forces: wind and buoyancy. Depending on the weather conditions one of them was the main driving force, or both were of the same order. When the wind force was the main driving force, higher flow rates were found. In these cases buoyancy acted as supporting driving force. When the wind speed was low and buoyancy prevailed lower flow rates were found. Air and surface temperatures were predicted by the numerical model with a better accuracy than flow and energy rates. The model predicts correctly the influence of the wind and buoyancy driving forces. The experimental OVF module showed potential for free ventilation and air preheating, although it depends on weather and geometrical variables. The use of the numerical model using the right parameters was found viable for analyzing the performance of an OVF.

F. Peci López; R.L. Jensen; P. Heiselberg; M. Ruiz de Adana Santiago

2012-01-01T23:59:59.000Z

282

Heat and Power Systems Design  

E-Print Network [OSTI]

HEAT AND POWER SYSTEMS DESIGN H. D. Spriggs and J. V. Shah, Leesburg. VA ABSTRACT The selection of heat and power systems usually does not include a thorough analysis of the process heating. cooling and power requirements. In most cases..., these process requirements are accepted as specifications before heat and power systems are selected and designed. In t~is article we describe how Process Integration using Pinch Technology can be used to understand and achieve the minimum process heating...

Spriggs, H. D.; Shah, J. V.

283

Heat Pipes: An Industrial Application  

E-Print Network [OSTI]

This paper reviews the basics of heat pipe exchangers. Included are how they are constructed, how they operate, where they have application, and various aspects of evaluating a potential application. After discussing the technical aspects of heat...

Murray, F.

1984-01-01T23:59:59.000Z

284

Association of Classroom Ventilation with Reduced Illness Absence: A  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Association of Classroom Ventilation with Reduced Illness Absence: A Association of Classroom Ventilation with Reduced Illness Absence: A Prospective Study in California Elementary Schools Title Association of Classroom Ventilation with Reduced Illness Absence: A Prospective Study in California Elementary Schools Publication Type Journal Article Refereed Designation Refereed LBNL Report Number LBNL-6259E Year of Publication 2013 Authors Mendell, Mark J., Ekaterina Eliseeva, Morris G. Davies, Michael Spears, Agnes B. Lobscheid, William J. Fisk, and Michael G. Apte Journal Indoor Air Keywords carbon dioxide, Illness absence, indoor environmental quality, schools, ventilation Abstract Limited evidence associates inadequate classroom ventilation rates (VRs) with increased illness absence (IA). We investigated relationships between VRs and IA in Californiaelementary schools over two school years in 162 3rd-5th grade classrooms in 28 schools in three school districts: South Coast (SC), Bay Area (BA), and Central Valley (CV). We estimated relationships between daily IA and VR (estimated from real-time carbon dioxide) in zero-inflated negative binomial models. We also compared IA benefits and energy costs of increased VRs. All school districts had median VRs below the 7.1 L/sec-person California standard. For each additional 1 L/sec-person of VR, IA was reduced significantly (p<0.05) in models for combined districts (-1.6%) and for SC (-1.2%), and non-significantly for districts providing less data: BA (-1.5%) and CV (-1.0%). Assuming associations were causal and generalizable, increasing classroom VRs from the California average (4 L/sec-person) to the State standard would decrease IA by 3.4%, increase attendance-linked funding to schools by $33 million annually, and increase costs only $4 million. Further increasing VRs would provide additional benefits. These findings, while requiring confirmation, suggest that increasing classroom VRs above the State

285

Geothermal Heat Pumps- Heating Mode  

Broader source: Energy.gov [DOE]

In winter, fluid passing through this vertical, closed loop system is warmed by the heat of the earth; this heat is then transferred to the building.

286

Evaluating Ventilation Systems for Existing Homes  

SciTech Connect (OSTI)

During the course of this project, an affordable and high performance ductwork system to directly address the problems of thermal losses, poor efficiency, and air leakage was designed. To save space and enable direct connections between different floors of the building, the ductwork system was designed in such a way that it occupied interior or exterior frame wall cavities. The ductwork system satisfied building regulations for structural support when bridging multiple floors, the spread of fire and smoke, and insulation to reduce the heat flow into or out of the building. Retrofits of urban residential buildings will be the main focus for the application of this ductwork system. Highly reflective foils and insulating materials were used to aid in the increase of the overall R-value of the ductwork itself and the wall assembly. It is expected that the proposed system will increase the efficiency of the HVAC system and the thermal resistance of the building envelope. The performance of the proposed ductwork design was numerically evaluated in a number of different ways. Our results indicate that the duct method is a very cost attractive alternative to the conventional method.

Aldrich, R.; Arena, L.

2013-02-01T23:59:59.000Z

287

Computer Modeling VRF Heat Pumps in Commercial Buildings using EnergyPlus  

SciTech Connect (OSTI)

Variable Refrigerant Flow (VRF) heat pumps are increasingly used in commercial buildings in the United States. Monitored energy use of field installations have shown, in some cases, savings exceeding 30% compared to conventional heating, ventilating, and air-conditioning (HVAC) systems. A simulation study was conducted to identify the installation or operational characteristics that lead to energy savings for VRF systems. The study used the Department of Energy EnergyPlus? building simulation software and four reference building models. Computer simulations were performed in eight U.S. climate zones. The baseline reference HVAC system incorporated packaged single-zone direct-expansion cooling with gas heating (PSZ-AC) or variable-air-volume systems (VAV with reheat). An alternate baseline HVAC system using a heat pump (PSZ-HP) was included for some buildings to directly compare gas and electric heating results. These baseline systems were compared to a VRF heat pump model to identify differences in energy use. VRF systems combine multiple indoor units with one or more outdoor unit(s). These systems move refrigerant between the outdoor and indoor units which eliminates the need for duct work in most cases. Since many applications install duct work in unconditioned spaces, this leads to installation differences between VRF systems and conventional HVAC systems. To characterize installation differences, a duct heat gain model was included to identify the energy impacts of installing ducts in unconditioned spaces. The configuration of variable refrigerant flow heat pumps will ultimately eliminate or significantly reduce energy use due to duct heat transfer. Fan energy is also studied to identify savings associated with non-ducted VRF terminal units. VRF systems incorporate a variable-speed compressor which may lead to operational differences compared to single-speed compression systems. To characterize operational differences, the computer model performance curves used to simulate cooling operation are also evaluated. The information in this paper is intended to provide a relative difference in system energy use and compare various installation practices that can impact performance. Comparative results of VRF versus conventional HVAC systems include energy use differences due to duct location, differences in fan energy when ducts are eliminated, and differences associated with electric versus fossil fuel type heating systems.

Raustad, Richard

2013-06-01T23:59:59.000Z

288

Reaerosolization of Fluidized Spores in Ventilation Systems  

Science Journals Connector (OSTI)

...and air conditioning (HVAC) systems. Particles...velocity included the static charge attraction between...determined (12). The static charge from plastic was...deposited on the walls of the HVAC test apparatus (Fig...the duct system. Air pressure was exerted in the chamber...

Paula Krauter; Arthur Biermann

2007-02-09T23:59:59.000Z

289

Experiments measuring particle deposition from fully developed turbulent flow in ventilation ducts  

SciTech Connect (OSTI)

Particle deposition in ventilation ducts influences particle exposures of building occupants and may lead to a variety of indoor air quality concerns. Experiments have been performed in a laboratory to study the effects of particle size and air speed on deposition rates of particles from turbulent air flows in galvanized steel and internally insulated ducts with hydraulic diameters of 15.2 cm. The duct systems were constructed of materials typically found in commercial heating, ventilating and air conditioning (HVAC) systems. In the steel duct system, experiments with nominal particle sizes of 1, 3, 5, 9 and 16 {micro}m were conducted at each of three nominal air speeds: 2.2, 5.3 and 9.0 m/s. In the insulated duct system, deposition rates of particles with nominal sizes of 1, 3, 5, 8 and 13 {micro}m were measured at nominal air speeds of 2.2, 5.3 and 8.8 m/s. Fluorescent techniques were used to directly measure the deposition velocities of monodisperse fluorescent particles to duct surfaces (floor, wall and ceiling) at two straight duct sections where the turbulent flow profile was fully developed. In steel ducts, deposition rates were higher to the duct floor than to the wall, which were, in turn, greater than to the ceiling. In insulated ducts, deposition was nearly the same to the duct floor, wall and ceiling for a given particle size and air speed. Deposition to duct walls and ceilings was greatly enhanced in insulated ducts compared to steel ducts. Deposition velocities to each of the three duct surface orientations in both systems were found to increase with increasing particle size or air velocity over the ranges studied. Deposition rates measured in the current experiments were in general agreement with the limited observations of similar systems by previous researchers.

Sippola, Mark R.; Nazaroff, William W.

2003-08-01T23:59:59.000Z

290

CANCELLED: Mechanism of Human Responses to Ventilation Rates and Air  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

CANCELLED: Mechanism of Human Responses to Ventilation Rates and Air CANCELLED: Mechanism of Human Responses to Ventilation Rates and Air Temperature Speaker(s): Henry Willem Date: July 2, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Max Sherman (THIS SEMINAR TO BE RESCHEDULED.) Sustainability of the built-environment must be achieved in parallel with the sustenance of occupants' health and comfort. Actions to conserve energy and resources require much forethought and careful consideration due to possible consequences on the human aspects. Thus, many extensive works in the recent decades have focused on identifying the associations between indoor environment and human responses. Results have shown moderate to strong implications of thermal and indoor air quality factors on the prevalence and intensity of sick

291

Ventilation Relevant Contaminants of Concern in Commercial Buildings Screening  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ventilation Relevant Contaminants of Ventilation Relevant Contaminants of Concern in Commercial Buildings Screening Process and Results Srinandini Parthasarathy, Thomas E. McKone, Michael G. Apte Environmental Energy Technologies Division Indoor Environment Department Lawrence Berkeley National Laboratory Berkeley, CA 94720 April 29, 2111 Prepared for the California Energy Commission, Public Interest Energy Research Program, Energy Related Environmental Research Program Legal Notice The Lawrence Berkeley National Laboratory is a national laboratory of the DOE managed by the University of California for the U.S. Department of Energy under Contract Number DE-AC02- 05CH11231. This report was prepared as an account of work sponsored by the Sponsor and pursuant to an M&O Contract with the United States Department of Energy (DOE). Neither the

292

Commissioning Residential Ventilation Systems: A Combined Assessment of  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Commissioning Residential Ventilation Commissioning Residential Ventilation Systems: A Combined Assessment of Energy and Air Quality Potential Values William J.N. Turner, Jennifer M. Logue, Craig P. Wray Environmental Energy Technologies Division July 2012 LBNL-5969E 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 California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein

293

Air temperature effect on thermal models for ventilated dry-type transformers  

Science Journals Connector (OSTI)

The temperature of the air surrounding the windings of ventilated dry-type transformers is an important factor in the cooling of the windings since they are cooled only by the air. In particular, inner windings are sensitive to the air temperature in vertical cooling ducts. This study presents air temperature effect on the temperatures in foil-type inner winding for the dry-type transformers. A transformer rated at 2000 kVA was selected for the research and temperature distribution was calculated under constant and varying air temperatures inside vertical ducts at three different loads. The 2-D transient heat diffusion equation was solved using the finite element method by coupling it with the vector potential equation due to non-uniformly generated heat caused by eddy currents in the foil winding. The calculated temperatures at constant and varying air temperatures are presented together with experimental values. The numerical and experimental results of this study showed that the air temperature affects the accuracy of temperatures in foil-type inner winding greatly.

Moonhee Lee; Hussein A. Abdullah; Jan C. Jofriet; Dhiru Patel; Murat Fahrioglu

2011-01-01T23:59:59.000Z

294

Indoor Chemistry: Materials, Ventilation Systems, and Occupant Activities  

SciTech Connect (OSTI)

Chemical processes taking place in indoor environments can significantly alter the nature and concentrations of pollutants. Exposure to secondary contaminants generated in these reactions needs to be evaluated in association with many aspects of buildings to minimize their impact on occupant health and well-being. Focusing on indoor ozone chemistry, we describe alternatives for improving indoor air quality by controlling chemical changes related to building materials, ventilation systems, and occupant activities.

Morrison, G.C.; Corsi, R.L.; Destaillats, H.; Nazaroff, W.W.; Wells, J.R.

2006-05-01T23:59:59.000Z

295

Good seal construction and ventilation controls improve airflow  

SciTech Connect (OSTI)

As workings become deeper and more distant from the ventilation inlet, better seal construction technology is needed. Tekseal, a specially formulated pumpable grout which allows a seal to be erected quickly and safety, is Minova's answer to the limitations of traditional block seals. Its use is explained in this article. An alternative product is the Carbonfill range which comprises a two-component phenolic resin based foam generating by a pump. 3 photos.

NONE

2005-12-15T23:59:59.000Z

296

Physical features of small disperse coal dust fraction transportation and structurization processes in iodine air filters of absorption type in ventilation systems at nuclear power plants  

E-Print Network [OSTI]

The research on the physical features of transportation and structurization processes by the air-dust aerosol in the granular filtering medium with the cylindrical coal adsorbent granules in an air filter of the adsorption type in the heating ventilation and cooling (HVAC) system at the nuclear power plant is completed. The physical origins of the coal dust masses distribution along the absorber with the granular filtering medium with the cylindrical coal granules during the air-dust aerosol intake process in the near the surface layer of absorber are researched. The quantitative technical characteristics of air filtering elements, which have to be considered during the optimization of air filters designs for the application in the ventilation systems at the nuclear power plants, are obtained.

Ledenyov, Oleg P; Poltinin, P Ya; Fedorova, L I

2012-01-01T23:59:59.000Z

297

Building America Case Study: Evaluation of Ventilation Strategies in New Construction Multifamily Buildings, New York, New York (Fact Sheet)  

SciTech Connect (OSTI)

In multifamily buildings, particularly in the Northeast, exhaust ventilation strategies are the norm as a means of meeting both local exhaust and whole-unit mechanical ventilation rates. The issue of where the 'fresh' air is coming from is gaining significance as air-tightness standards for enclosures become more stringent, and the 'normal leakage paths through the building envelope' disappear. CARB researchers have found that the majority of high performance, new construction, multifamily housing in the Northeast use one of four general strategies for ventilation: continuous exhaust only with no designated supply or make-up air source, continuous exhaust with ducted make-up air to apartments, continuous exhaust with supply through a make-up air device integral to the unit HVAC, and continuous exhaust with supply through a passive inlet device, such as a trickle vent. Insufficient information is available to designers on how these various systems are best applied. Product performance data are based on laboratory tests, and the assumption is that products will perform similarly in the field. Proper application involves matching expected performance at expected building pressures, but there is no guarantee that those conditions will exist consistently in the finished building. This research effort, which included several weeks of building pressure monitoring, sought to provide field validation of system performance. The performance of four substantially different strategies for providing make-up air to apartments was evaluated.

Not Available

2014-09-01T23:59:59.000Z

298

Dynamic Allocation of a Domestic Heating Task to Gas-Based and Heatpump-Based Heating Agents  

Science Journals Connector (OSTI)

In this paper a multi-agent model for a domestic heating task is introduced and analysed. The model includes two alternative heating agents (for gas-based heating and for heatpump-based heating), and a third allo...

Jan Treur

2013-01-01T23:59:59.000Z

299

Susanville District Heating District Heating Low Temperature...  

Open Energy Info (EERE)

Susanville District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Susanville District Heating District Heating Low Temperature...

300

Modeling particle deposition on HVAC heat exchangers  

SciTech Connect (OSTI)

Fouling of fin-and-tube heat exchangers by particle deposition leads to diminished effectiveness in supplying ventilation and air conditioning. This paper explores mechanisms that cause particle deposition on heat exchanger surfaces. We present a model that accounts for impaction, diffusion, gravitational settling, and turbulence. Simulation results suggest that some submicron particles deposit in the heat exchanger core, but do not cause significant performance impacts. Particles between 1 and 10 {micro}m deposit with probabilities ranging from 1-20% with fin edge impaction representing the dominant mechanism. Particles larger than 10 {micro}m deposit by impaction on refrigerant tubes, gravitational settling on fin corrugations, and mechanisms associated with turbulent airflow. The model results agree reasonably well with experimental data, but the deposition of larger particles at high velocities is underpredicted. Geometric factors, such as discontinuities in the fins, are hypothesized to be responsible for the discrepancy.

Siegel, J.A.; Nazaroff, W.W.

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Low-Cost Ventilation in Production Housing- Building America Top Innovation  

Broader source: Energy.gov [DOE]

This Building America Innovations profile describes Building America research on simple whole-house ventilation systems that cost less than $350 to install and meet code requirements.

302

Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements- Joe Lstiburek  

Broader source: Energy.gov [DOE]

This presentation will be delivered at the U.S. Department of Energy Building America webinar, Multifamily Ventilation Strategies and Compartmentalization Requirements, on September 24, 2014. Joe...

303

THE IMPACT OF REDUCED VENTILATION ON INDOOR AIR QUALITY IN RESIDENTIAL BUILDINGS  

E-Print Network [OSTI]

carbon monoxide and nitrogen dioxide fron gas appliances;quality, infiltration, nitrogen dioxide, radon, ventilation.carbon monoxide (CO), nitrogen dioxide (N02)• formaldehyde (

Berk, James V.

2013-01-01T23:59:59.000Z

304

Economizer system cost effectiveness: Accounting for the influence of ventilation rate on sick leave  

E-Print Network [OSTI]

ECONOMIZER SYSTEM COST EFFECTIVENESS: ACCOUNTING FOR THEand economic benefits of an economizer ventilation controlanalyses indicate that the economizer reduces energy costs

Fisk, William J.; Seppanen, Olli; Faulkner, David; Huang, Joe

2003-01-01T23:59:59.000Z

305

E-Print Network 3.0 - air quality ventilation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

search results for: air quality ventilation Page: << < 1 2 3 4 5 > >> 1 Healthy Zero Energy Buildings ENVIRONMENTAL AREA RESEARCH Summary: control strategy impacts on indoor air...

306

Developing evidence-based prescriptive ventilation rate standards for commercial buildings in California: a proposed framework  

E-Print Network [OSTI]

quality survey. In: Healthy Buildings 2006. Lisbon,In: Proceedings of Healthy Buildings 2006. Lisbon, Portugal:as ventilation varies. In: Healthy Buildings 2012. Brisbane,

Mendell, Mark J.

2014-01-01T23:59:59.000Z

307

Solar heated swimming pool  

SciTech Connect (OSTI)

A swimming pool construction incorporating solar heating means to heat the pool water to a desired level. The pool includes a surrounding safety fence supported by a plurality of fence supports which are hollow and which include internal passageways. The pool water is passed through the pool support passageways whereupon it absorbs heat from the sidewalls of the fence supports, the surfaces of which have been heated by solar radiation. The fence supports can be made of plastic or other materials, but preferably are dark for improved absorptivity. The pool water can be passed serially through each of the fence supports and suitable thermostat control means can be provided to limit the water temperature increase.

Pettit, F.M.

1984-10-02T23:59:59.000Z

308

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

5 5 Conversion and Replacements of Centrifugal CFC Chillers Total Pre-1995 2,304 7,208 9,512 12% 1995 1,198 3,915 5,113 18% 1996 1,311 3,045 4,356 24% 1997 815 3,913 4,728 30% 1998 905 3,326 4,231 35% 1999 491 3,085 3,576 39% 2000 913 3,235 4,148 45% 2001 452 3,324 3,776 49% 2002 360 3,433 3,793 54% 2003 334 2,549 2,883 55% 2004 165 2,883 3,048 59% 2005 (2) 155 2,674 2,829 62% 2006 (2) 130 2,860 2,990 66% 2007 (2) 108 3,002 3,110 70% Total 9,641 Note(s): Source(s): 1) In 1992, approximately 80,000 centrifugal CFC chillers were in service, 82% of which used CFC-11, 12% CFC-12, and 6% CFC-113, CFC- 114, or R-500. 2) Projected. ARI, Replacement and Conversion of CFC for a Decade Chillers Slower Than Expected Assuring Steady Demand for Non-CFC Units, Apr. 25, 2005; ARI, New Legislation Would Spur Replacement of CFC Chillers, Mar. 31, 2004; ARI, Economy Affects CFC Chiller Phase-out, Apr. 2, 2003; ARI, Half way Mark in

309

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

6 6 Estimated U.S. Emissions of Halocarbons, 1987-2001 (MMT CO2 Equivalent) Gas 1987 1990 1992 1995 1998 2000 2001 Chlorofluorocarbons CFC-11 391 246 207 167 115 105 105 CFC-12 1,166 1,194 853 549 223 182 226 CFC-113 498 158 103 52 0 0 0 CFC-114 N.A. 46 29 16 1 N.A. N.A. CFC-115 N.A. 30 27 22 19 N.A. N.A. Bromofluorocarbons Halon-1211 N.A. 1 1 1 1 N.A. N.A. Halon-1301 N.A. 12 12 12 13 N.A. N.A. Hydrochlorofluorocarbons HCFC-22 116 136 135 123 128 134 137 HCFC-123 N.A. 0 0 0 0 N.A. N.A. HCFC-124 0 0 0 3 4 N.A. N.A. HCFC-141b N.A. 0 0 14 19 4 4 HCFC-142b N.A. 0 2 18 22 26 26 Hydrofluorocarbons HFC-23 48 36 36 28 41 31 22 HFC-125 N.A. 0 1 2 4 5 6 HFC-134a N.A. 1 1 19 35 44 41 Total 2,219 1,861 1,408 1,024 624 532 566 Source(s): Intergovernmental Panel for Climate Change, Climate Change 2001: The Scientific Basis, Jan. 2001, Table 3, p. 47 for GWPs; EIA, Emissions of Greenhouse Gases in the U.S. 2001, Dec. 2002, Table 29, p. 71 and Table D2, p. D-5 for 1990-2001 emissions; EPA, Inventory of U.S. Greenhouse Gas Emissions and

310

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book [EERE]

4 4 Halocarbon Environmental Coefficients and Principal Uses 100-Year Global Ozone Depletion Warming Potential Potential (ODP) Compound (CO2 = 1) (Relative to CFC-11) Principal Uses Chlorofluorocarbons CFC-11 1.00 Blowing Agent, Chillers CFC-12 (1) 1.00 Auto A/C, Chillers, & Blowing Agent CFC-113 0.80 Solvent CFC-114 1.00 Solvent CFC-115 (2) 0.60 Solvent, Refrigerant Hydrochlorofluorocarbons HCFC-22 (2) 0.06 Residential A/C HCFC-123 0.02 Refrigerant HCFC-124 0.02 Sterilant HCFC-141b 0.11 CFC Replacement HCFC-142b 0.07 CFC Replacement Bromofluorocarbons Halon-1211 3.00 Fire Extinguishers Halon-1301 10.00 Fire Extinguishers Hydrofluorocarbons HFC-23 0.00 HCFC Byproduct HFC-125 0.00 CFC/HCFC Replacement HFC-134a 0.00 Auto A/C, Refrigeration HFC-152a (1) 0.00 Aerosol Propellant HFC-227ea 0.00 CFC Replacement

311

Risk Factors in Heating, Ventilating, and Air-Conditioning Systems for Occupant Symptoms in  

E-Print Network [OSTI]

upper respiratory symptoms, cough, eye symptoms, fatigue orof breath, or chest tightness); cough; upper respiratory (atrespiratory symptoms, cough, and eye symptoms. Calibration

Mendell, M.J.; Lei-Gomez, Q.; Mirer, A.; Seppanen, O.; Brunner, G.

2007-01-01T23:59:59.000Z

312

Modelica Library for Building Heating, Ventilation and Air-Conditioning Systems  

E-Print Network [OSTI]

Austria, September 2006. Modelica As- sociation and Arsenalsystems. The ?exibility of Modelica has been T room in [° C]lss. AirConditioning - a Modelica li- o brary for dynamic

Wetter, Michael

2010-01-01T23:59:59.000Z

313

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation...  

Buildings Energy Data Book [EERE]

7 2008 Gas Furnace Manufacturer Market Shares (Percent of Products Produced) Company Market Share (%) Total Units Shipped: UTCCarrier 32% Goodman (Amana) 15% Lennox 13% American...

314

Risk Factors in Heating, Ventilating, and Air-Conditioning Systems for Occupant Symptoms in  

E-Print Network [OSTI]

cooling units (e.g. , fan coil units) in office buildingsinduction units, fan coil units, individual room packaged ACsystems, cooling tower, fan coil unit, and terminal units.

Mendell, M.J.; Lei-Gomez, Q.; Mirer, A.; Seppanen, O.; Brunner, G.

2007-01-01T23:59:59.000Z

315

Heating, Ventilation, and Air Conditioning Design Strategy for a Hot-Humid Production Builder  

SciTech Connect (OSTI)

BSC worked directly with the David Weekley Homes - Houston division to redesign three floor plans in order to locate the HVAC system in conditioned space. The purpose of this project is to develop a cost effective design for moving the HVAC system into conditioned space. In addition, BSC conducted energy analysis to calculate the most economical strategy for increasing the energy performance of future production houses. This is in preparation for the upcoming code changes in 2015. The builder wishes to develop an upgrade package that will allow for a seamless transition to the new code mandate. The following research questions were addressed by this research project: 1. What is the most cost effective, best performing and most easily replicable method of locating ducts inside conditioned space for a hot-humid production home builder that constructs one and two story single family detached residences? 2. What is a cost effective and practical method of achieving 50% source energy savings vs. the 2006 International Energy Conservation Code for a hot-humid production builder? 3. How accurate are the pre-construction whole house cost estimates compared to confirmed post construction actual cost? BSC and the builder developed a duct design strategy that employs a system of dropped ceilings and attic coffers for moving the ductwork from the vented attic to conditioned space. The furnace has been moved to either a mechanical closet in the conditioned living space or a coffered space in the attic.

Kerrigan, P.

2014-03-01T23:59:59.000Z

316

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation...  

Buildings Energy Data Book [EERE]

2005 Natural Gas 56% 57% 55% 46% 45% 45% 45% Electricity 8% 18% 26% 36% 42% 42% 43% Fuel Oil 14% 10% 7% 5% 2% 2% 2% LPG 5% 3% 2% 5% 6% 8% 8% Other (1) 17% 12% 10% 8% 4% 3% 2% Total...

317

Reducing Ventilation Energy Demand by Using Air-to-Earth Heat Exchangers  

Science Journals Connector (OSTI)

For the cases where the duct spacing was investigated, results showed that the outlet temperature of the earth ducts changed only marginally for the three cases simulated. The energy saving per duct showed a slig...

Hans Havtun; Caroline Törnqvist

2013-01-01T23:59:59.000Z

318

Confinement Ventilation and Process Gas Treatment Functional Area Qualification Standard  

Broader source: Energy.gov (indexed) [DOE]

. . NOT MEASUREMENT SENSITIVE DOE-STD-1168-2013 October 2013 DOE STANDARD CONFINEMENT VENTILATION AND PROCESS GAS TREATMENT FUNCTIONAL AREA QUALIFICATION STANDARD DOE Defense Nuclear Facilities Technical Personnel U.S. Department of Energy AREA TRNG Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. DOE-STD-1168-2013 This document is available on the Department of Energy Technical Standards Program Website at http://energy.gov/hss/information-center/department-energy-technical-standards-program ii DOE-STD-1168-2013 INTENTIONALLY BLANK iv DOE-STD-1168-2013 TABLE OF CONTENTS ACKNOWLEDGMENT...................................................................................................................vii

319

Evaluation of pulmonary ventilation in horses during methoxyflurane anesthesia  

E-Print Network [OSTI]

and venous pH, pCO2, p02, and HCO3 in evaluating pulmonary ventilation and the metabolic status of the horse. LITERATURE REVIEW 8oth methoxyflurane and halothane were first used in the early 1960's as inhalation anesthetics ' ' ' ' ' . These agents were... 7)12, 13, 15, 28&36 primarily responsible for the increase in popularity of gas anesthesia in veterinary medicine. Inhalation anesthesia with these agents pro- duced some long awaited advantages over intravenous long-acting bar- biturates...

McDonald, Don Reed

2012-06-07T23:59:59.000Z

320

A scaling investigation of the laminar convective flow in a solar chimney for natural ventilation  

Science Journals Connector (OSTI)

Abstract The flow behavior due to natural convection of air (with a Prandtl number less than 1) inside a solar chimney with an imposed heat flux on a vertical absorber wall is investigated by a scaling analysis and a corresponding numerical simulation. Three distinct flow regimes are identified, one with a distinct thermal boundary layer and the other two without a distinct thermal boundary layer, depending on the Rayleigh number. The two regimes without a distinct thermal boundary layer are further classified into low and medium Rayleigh number sub-regimes respectively. These sub-regimes are characterized by conduction dominance in which the thermal boundary layer grows to encompass the entire width of the channel before convection becomes important. Flow development in each of these flow regimes and sub-regimes is characterized through transient scaling, and scaling correlations are developed to describe the temperature, flow velocity and mass flow rate, which characterize the ventilation performance of the solar chimney. The scaling arguments are validated by the corresponding numerical data.

Rakesh Khanal; Chengwang Lei

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Effect of fluctuating wind direction on cross natural ventilation in buildings from large eddy simulation  

E-Print Network [OSTI]

wind direction, and the simulated results agree reasonably with the corresponding experimental data is the use of small-scale models in a wind tunnel to simulate natural ventilation. In general, the mean flow1 Effect of fluctuating wind direction on cross natural ventilation in buildings from large eddy

Chen, Qingyan "Yan"

322

Ventilation performance prediction for buildings: Model Assessment Qingyan Chena,b,*  

E-Print Network [OSTI]

1 Ventilation performance prediction for buildings: Model Assessment Qingyan Chena,b,* , Kisup Leeb building, but cannot provide detailed flow information in a room. The zonal model can be useful when a user ventilation systems for buildings requires a suitable model to assess system performance. The performance can

Chen, Qingyan "Yan"

323

ENERGY ANALYSISF FOR WORKSHOPS WITH FLOOR-SUPPLY DISPLACEMENT VENTILATION UNDER THE U.S. CLIMATES  

E-Print Network [OSTI]

use more fan and boiler energy but less chiller energy than the mixing ventilation system. The total in order to handle the high cooling loads found in U.S. buildings. Thus, the displacement ventilation, the chiller efficiency is increased. Besides, the

Chen, Qingyan "Yan"

324

A New Empirical Model for Predicting Single-Sided, Wind-Driven Natural Ventilation in Buildings  

E-Print Network [OSTI]

ventilation rate due to the pulsating flow and eddy penetration of single-sided, wind-driven natural Normal to the opening q Fluctuating flow rate e Eddy penetration Wang, H. and Chen, Q. 2012. "A new buildings. A new empirical model was developed that can predict the mean ventilation rate and fluctuating

Chen, Qingyan "Yan"

325

Ventilation and Air Quality in Indoor Ice Skating Arenas Chunxin Yang, Ph.D.1  

E-Print Network [OSTI]

Ventilation and Air Quality in Indoor Ice Skating Arenas Chunxin Yang, Ph.D.1 Philip Demokritou, and the operation strategy of the ventilation system are significant contributing factors to the indoor air quality contamination levels in the arenas. Keywords: Air distribution, health, skating rink, indoor air quality, space

Chen, Qingyan "Yan"

326

A case study of boundary layer ventilation by convection and coastal processes  

E-Print Network [OSTI]

of the pollution in the atmosphere originates from emissions in the atmospheric boundary layer, the region; published 12 September 2007. [1] It is often assumed that ventilation of the atmospheric boundary layer responsible for ventilation of the atmospheric boundary layer during a nonfrontal day that occurred on 9 May

Dacre, Helen

327

Modeling Coupled Evaporation and Seepage in Ventilated Cavities  

SciTech Connect (OSTI)

Cavities excavated in unsaturated geological formations are important to activities such as nuclear waste disposal and mining. Such cavities provide a unique setting for simultaneous occurrence of seepage and evaporation. Previously, inverse numerical modeling of field liquid-release tests and associated seepage into cavities were used to provide seepage-related large-scale formation properties by ignoring the impact of evaporation. The applicability of such models was limited to the narrow range of ventilation conditions under which the models were calibrated. The objective of this study was to alleviate this limitation by incorporating evaporation into the seepage models. We modeled evaporation as an isothermal vapor diffusion process. The semi-physical model accounts for the relative humidity, temperature, and ventilation conditions of the cavities. The evaporation boundary layer thickness (BLT) over which diffusion occurs was estimated by calibration against free-water evaporation data collected inside the experimental cavities. The estimated values of BLT were 5 to 7 mm for the open underground drifts and 20 mm for niches closed off by bulkheads. Compared to previous models that neglected the effect of evaporation, this new approach showed significant improvement in capturing seepage fluctuations into open cavities of low relative humidity. At high relative-humidity values (greater than 85%), the effect of evaporation on seepage was very small.

T. Ghezzehei; R. Trautz; S. Finsterle; P. Cook; C. Ahlers

2004-07-01T23:59:59.000Z

328

Overall Ventilation System Flow Network Calculation for Site Recommendation  

SciTech Connect (OSTI)

The scope of this calculation is to determine ventilation system resistances, pressure drops, airflows, and operating cost estimates for the Site Recommendation (SR) design as detailed in the ''Site Recommendation Subsurface Layout'' (BSC (Bechtel SAIC Company) 2001a). The statutory limit for emplacement of waste in Yucca Mountain is 70,000 metric tons of uranium (MTU) and is considered the base case for this report. The objective is to determine the overall repository system ventilation flow network for the monitoring phase during normal operations and to provide a basis for the system description document design descriptions. Any values derived from this calculation will not be used to support construction, fabrication, or procurement. The work scope is identified in the ''Technical Work Plan for Subsurface Design Section FY01 Work Activities'' (CRWMS M&O 2001, pp. 6 and 13). In accordance with the technical work plan this calculation was prepared in accordance with AP-3.12Q, ''Calculations'' and other procedures invoked by AP-3.12Q. It also incorporates the procedure AP-SI1.Q, ''Software Management''.

Jeff J. Steinhoff

2001-08-02T23:59:59.000Z

329

Heat Stroke  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

stress, from exertion or hot environments, places stress, from exertion or hot environments, places workers at risk for illnesses such as heat stroke, heat exhaustion, or heat cramps. Heat Stroke A condition that occurs when the body becomes unable to control its temperature, and can cause death or permanent disability. Symptoms ■ High body temperature ■ Confusion ■ Loss of coordination ■ Hot, dry skin or profuse sweating ■ Throbbing headache ■ Seizures, coma First Aid ■ Request immediate medical assistance. ■ Move the worker to a cool, shaded area. ■ Remove excess clothing and apply cool water to their body. Heat Exhaustion The body's response to an excessive loss of water and salt, usually through sweating. Symptoms ■ Rapid heart beat ■ Heavy sweating ■ Extreme weakness or fatigue ■

330

Active Solar Heating Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Active Solar Heating Basics Active Solar Heating Basics Active Solar Heating Basics August 16, 2013 - 3:23pm Addthis There are two basic types of active solar heating systems based on the type of fluid-either liquid or air-that is heated in the solar energy collectors. The collector is the device in which a fluid is heated by the sun. Liquid-based systems heat water or an antifreeze solution in a "hydronic" collector, whereas air-based systems heat air in an "air collector." Both of these systems collect and absorb solar radiation, then transfer the solar heat directly to the interior space or to a storage system, from which the heat is distributed. If the system cannot provide adequate space heating, an auxiliary or back-up system provides the additional heat. Liquid systems are more often used when storage is included, and are well

331

Dynamic Allocation of a Domestic Heating Task to Gas-Based and Heatpump-Based Heating Agents  

E-Print Network [OSTI]

Dynamic Allocation of a Domestic Heating Task to Gas-Based and Heatpump-Based Heating Agents Jan for a domestic heating task is introduced and analysed. The model includes two alternative heating agents (for gas-based heating and for heatpump-based heating), and a third allocation agent which determines

Treur, Jan

332

DOE Announces 2008 Federal Energy and Water Management Awards...  

Office of Environmental Management (EM)

improving operations and maintenance practices and upgrading building management and heating, ventilating, and air conditioning equipment, including recommissioning energy...

333

Fast reactor power plant design having heat pipe heat exchanger  

DOE Patents [OSTI]

The invention relates to a pool-type fission reactor power plant design having a reactor vessel containing a primary coolant (such as liquid sodium), and a steam expansion device powered by a pressurized water/steam coolant system. Heat pipe means are disposed between the primary and water coolants to complete the heat transfer therebetween. The heat pipes are vertically oriented, penetrating the reactor deck and being directly submerged in the primary coolant. A U-tube or line passes through each heat pipe, extended over most of the length of the heat pipe and having its walls spaced from but closely proximate to and generally facing the surrounding walls of the heat pipe. The water/steam coolant loop includes each U-tube and the steam expansion device. A heat transfer medium (such as mercury) fills each of the heat pipes. The thermal energy from the primary coolant is transferred to the water coolant by isothermal evaporation-condensation of the heat transfer medium between the heat pipe and U-tube walls, the heat transfer medium moving within the heat pipe primarily transversely between these walls.

Huebotter, P.R.; McLennan, G.A.

1984-08-30T23:59:59.000Z

334

Fast reactor power plant design having heat pipe heat exchanger  

DOE Patents [OSTI]

The invention relates to a pool-type fission reactor power plant design having a reactor vessel containing a primary coolant (such as liquid sodium), and a steam expansion device powered by a pressurized water/steam coolant system. Heat pipe means are disposed between the primary and water coolants to complete the heat transfer therebetween. The heat pipes are vertically oriented, penetrating the reactor deck and being directly submerged in the primary coolant. A U-tube or line passes through each heat pipe, extended over most of the length of the heat pipe and having its walls spaced from but closely proximate to and generally facing the surrounding walls of the heat pipe. The water/steam coolant loop includes each U-tube and the steam expansion device. A heat transfer medium (such as mercury) fills each of the heat pipes. The thermal energy from the primary coolant is transferred to the water coolant by isothermal evaporation-condensation of the heat transfer medium between the heat pipe and U-tube walls, the heat transfer medium moving within the heat pipe primarily transversely between these walls.

Huebotter, Paul R. (Western Springs, IL); McLennan, George A. (Downers Grove, IL)

1985-01-01T23:59:59.000Z

335

DOE Office of Indian Energy Foundational Course on Direct Use for Building Heat and Hot Water  

Broader source: Energy.gov (indexed) [DOE]

DIRECT USE FOR BUILDING HEAT & HOT WATER Presented by the National Renewable Energy Laboratory Course Outline 2 What we will cover...  About the DOE Office of Indian Energy Education Initiative  Course Introduction  Solar Thermal and Solar Ventilation Air Pre-Heat - Resources, Technology, Examples & Cost, and References  Biomass Heat - Resources, Technology, Examples & Cost, and References  Geothermal Building Heat - Resources, Technology, Examples & Cost, and References  Additional Information & Resources Introduction The U.S. Department of Energy (DOE) Office of Indian Energy Policy and Programs is responsible for assisting Tribes with energy planning and development, infrastructure, energy costs, and electrification of Indian

336

Meals included in Conference Registrations  

E-Print Network [OSTI]

Meals included in Conference Registrations Meals included as part of the cost of a conference the most reasonable rates are obtained. Deluxe hotels and motels should be avoided. GSA rates have been for Georgia high cost areas. 75% of these amounts would be $21 for non- high cost areas and $27 for high cost

Arnold, Jonathan

337

Energy-efficient water heating  

SciTech Connect (OSTI)

This fact sheet describes how to reduce the amount of hot water used in faucets and showers, automatic dishwashers, and washing machines; how to increase water-heating system efficiency by lowering the water heater thermostat, installing a timer and heat traps, and insulating hot water pipes and the storage tank; and how to use off-peak power to heat water. A resource list for further information is included.

NONE

1995-01-01T23:59:59.000Z

338

Formadehyde in New Homes: Ventilation vs. Source Control  

Broader source: Energy.gov (indexed) [DOE]

at at Building America Residential Energy Efficiency Stakeholder Meeting March 1, 2012 Austin, Texas Formaldehyde in New Homes --- Ventilation vs. Source Control Brett C. Singer and Henry Willem Environmental Energy Technologies Division Lawrence Berkeley National Laboratory Acknowledgments * Funding - U.S. Department of Energy - Building America Program - U.S. EPA - Indoor Environments Division - U.S. HUD - Office of Healthy Homes and Lead Hazard Control - Cal. Energy Commission Public Interest Environmental Research * Technical Contributions - Fraunhofer - Ibacos - IEE-SF * LBNL Team - Sherman, Hotchi, Russell, Stratton, and Others Background 1  Formaldehyde is an irritant and a carcinogen  Odor threshold: about 800 ppb  Widely varying health standards  US HUD (8-h): 400 ppb

339

INSULATION OF HEATING SYSTEMS  

Science Journals Connector (OSTI)

... C. PALLOT gave a Cantor Lecture to the Royal Society of Arts on “Thermal Insulation at Medium Temperature” on November 23 ; the lecture, which included many topics of ... many topics of current interest, has now been published1. In a bulletin on heat insulation issued by the Ministry of Fuel and Power, it was pointed out that "In ...

1943-05-22T23:59:59.000Z

340

Heating of a testing room by use of a hydrogen-fueled catalytic heater  

Science Journals Connector (OSTI)

Space heating experiments were carried out using flameless (catalytic) combustion of hydrogen with atmospheric oxygen on Pt and oxide catalyst pads. The heating rate required for warming of a testing room was calculated and material balance equations for oxygen depletion and steam production were derived. The following parameters have been investigated: 1. (a) change of the oxygen and water vapour contents in the testing room in comparison with the calculated values, 2. (b) the established thermal regime in the testing room is discussed in comparison with conventional heating. The following conclusions are drawn: 1. (1) The hydrogen combustion can be adjusted to produce the desired temperature level, 2. li(2) in order to maintain the oxygen concentration at the comfort level, the free ventilation in the room should be supplemented by short, periodic, forced ventilation, 3. (3) the comfort limits of humidity require the condensation of the surplus water vapour by using a suitable device.

J. Mercea; E. Grecu; T. Fodor

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Sponsorship includes: Agriculture in the  

E-Print Network [OSTI]

Sponsorship includes: · Agriculture in the Classroom · Douglas County Farm Bureau · Gifford Farm · University of Nebraska Agricultural Research and Development Center · University of Nebraska- Lincoln Awareness Coalition is to help youth, primarily from urban communities, become aware of agriculture

Nebraska-Lincoln, University of

342

Heating System Specification Specification of Heating System  

E-Print Network [OSTI]

Appendix A Heating System Specification /* Specification of Heating System (loosely based */ requestHeat : Room ­? bool; 306 #12; APPENDIX A. HEATING SYSTEM SPECIFICATION 307 /* user inputs */ livingPattern : Room ­? behaviour; setTemp : Room ­? num; heatSwitchOn, heatSwitchOff, userReset : simple

Day, Nancy

343

Air heating system  

DOE Patents [OSTI]

A self-starting, fuel-fired, air heating system including a vapor generator, a turbine, and a condenser connected in a closed circuit such that the vapor output from the vapor generator is conducted to the turbine and then to the condenser where it is condensed for return to the vapor generator. The turbine drives an air blower which passes air over the condenser for cooling the condenser. Also, a condensate pump is driven by the turbine. The disclosure is particularly concerned with the provision of heat exchanger and circuitry for cooling the condensed fluid output from the pump prior to its return to the vapor generator.

Primeau, John J. (19800 Seminole Rd., Euclid, OH 44117)

1983-03-01T23:59:59.000Z

344

Modeling of strongly heat-driven flow processes at a potential high-level nuclear waste repository at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Two complementary numerical models for analyzing high-level nuclear waste emplacement at Yucca Mountain have been developed. A vertical cross-sectional (X-Z) model permits a realistic representation of hydrogeologic features, such as alternating tilting layers of welded and non-welded tuffs. fault zones, and surface topography. An alternative radially symmetric (R-Z) model is more limited in its ability to describe the hydrogeology of the site, but is better suited to model heat transfer in the host rock. Our models include a comprehensive description of multiphase fluid and heat flow processes, including strong enhancements of vapor diffusion from pore-level phase change effects. The neighborhood of the repository is found to partially dry out from the waste heat. A condensation halo of large liquid saturation forms around the drying zone, from which liquid flows downward at large rates. System response to infiltration from the surface and to ventilation of mined openings is evaluated. The impact of the various flow processes on the waste isolation capabilities of the site is discussed.

Pruess, K.; Tsang, Y.

1993-01-01T23:59:59.000Z

345

Chapter 5 - Solar Water-Heating Systems  

Science Journals Connector (OSTI)

Abstract Chapter 5 is on solar water-heating systems. Both passive and active systems are described. Passive systems include thermosiphon and integrated collector storage systems. The former include theoretical performance of thermosiphon solar water heaters, reverse circulation in thermosiphon systems, vertical against horizontal tank configurations, freeze protection, and tracking thermosiphons. Subsequently, active systems are described, which include direct circulation systems, indirect water-heating systems, air water-heating systems, heat pump systems and pool heating systems, which include the analysis of various heat losses like evaporation, radiation, convection heat losses, make-up water load, and solar radiation-heat gain. Then the characteristics and thermal analysis of heat storage systems for both water and air systems are presented. The module and array design methods are then described and include the effects of shading, thermal expansion, galvanic corrosion, array sizing, heat exchangers, pipe and duct losses, partially shaded collectors and over-temperature protection—followed by an analysis of the characteristics of differential thermostats. Finally, methods to calculate the hot water demand are given as well as a review of international standards used to evaluate the solar water heaters performance. The chapter includes also simple system models and practical considerations for the setup of solar water-heating systems, which include: pipes, supports and insulation; pumps; valves and instrumentation.

Soteris A. Kalogirou

2014-01-01T23:59:59.000Z

346

Heat pump system with selective space cooling  

DOE Patents [OSTI]

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve. 4 figs.

Pendergrass, J.C.

1997-05-13T23:59:59.000Z

347

Heat pump system with selective space cooling  

DOE Patents [OSTI]

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve.

Pendergrass, Joseph C. (Gainesville, GA)

1997-01-01T23:59:59.000Z

348

Developing evidence-based prescriptive ventilation rate standards for commercial buildings in California: a proposed framework  

SciTech Connect (OSTI)

Background - The goal of this project, with a focus on commercial buildings in California, was to develop a new framework for evidence-based minimum ventilation rate (MVR) standards that protect occupants in buildings while also considering energy use and cost. This was motivated by research findings suggesting that current prescriptive MVRs in commercial buildings do not provide occupants with fully safe and satisfactory indoor environments. Methods - The project began with a broad review in several areas ? the diverse strategies now used for standards or guidelines for MVRs or for environmental contaminant exposures, current knowledge about adverse human effects associated with VRs, and current knowledge about contaminants in commercial buildings, including their their presence, their adverse human effects, and their relationships with VRs. Based on a synthesis of the reviewed information, new principles and approaches are proposed for setting evidence-based VRs standards for commercial buildings, considering a range of human effects including health, performance, and acceptability of air. Results ? A review and evaluation is first presented of current approaches to setting prescriptive building ventilation standards and setting acceptable limits for human contaminant exposures in outdoor air and occupational settings. Recent research on approaches to setting acceptable levels of environmental exposures in evidence-based MVR standards is also described. From a synthesis and critique of these materials, a set of principles for setting MVRs is presented, along with an example approach based on these principles. The approach combines two sequential strategies. In a first step, an acceptable threshold is set for each adverse outcome that has a demonstrated relationship to VRs, as an increase from a (low) outcome level at a high reference ventilation rate (RVR, the VR needed to attain the best achievable levels of the adverse outcome); MVRs required to meet each specific outcome threshold are estimated; and the highest of these MVRs, which would then meet all outcome thresholds, is selected as the target MVR. In a second step, implemented only if the target MVR from step 1 is judged impractically high, costs and benefits are estimated and this information is used in a risk management process. Four human outcomes with substantial quantitative evidence of relationships to VRs are identified for initial consideration in setting MVR standards. These are: building-related symptoms (sometimes called sick building syndrome symptoms), poor perceived indoor air quality, and diminished work performance, all with data relating them directly to VRs; and cancer and non-cancer chronic outcomes, related indirectly to VRs through specific VR-influenced indoor contaminants. In an application of step 1 for offices using a set of example outcome thresholds, a target MVR of 9 L/s (19 cfm) per person was needed. Because this target MVR was close to MVRs in current standards, use of a cost/benefit process seemed unnecessary. Selection of more stringent thresholds for one or more human outcomes, however, could raise the target MVR to 14 L/s (30 cfm) per person or higher, triggering the step 2 risk management process. Consideration of outdoor air pollutant effects would add further complexity to the framework. For balancing the objective and subjective factors involved in setting MVRs in a cost-benefit process, it is suggested that a diverse group of stakeholders make the determination after assembling as much quantitative data as possible.

Mendell, Mark J.; Fisk, William J.

2014-02-01T23:59:59.000Z

349

Clark Public Utilities - Residential Heat Pump Loan Program | Department of  

Broader source: Energy.gov (indexed) [DOE]

Heat Pump Loan Program Heat Pump Loan Program Clark Public Utilities - Residential Heat Pump Loan Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Maximum Rebate Air-Source Heat Pumps: $20,000 Geothermal Heat Pumps: $30,000 Program Info State District of Columbia Program Type Utility Loan Program Rebate Amount Air-Source Heat Pump: up to $20,000 Geothermal Heat Pumps: up to $30,000 Provider Clark Public Utilities Clark Public Utilities offers loans of up to $20,000 for air-source heat pumps and $30,000 for geothermal heat pumps. Loans will help customers cover the up-front cost of installing a highly efficient heat pump in a residence. All electrically heated homes, including manufactured homes, are eligible for the heat pump financing program, as long as the home has been

350

Are We Ready to Propose Guidelines for Health-Based Ventilation?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Are We Ready to Propose Guidelines for Health-Based Ventilation? Are We Ready to Propose Guidelines for Health-Based Ventilation? Speaker(s): Pawel Wargocki Date: October 14, 2013 - 12:00pm - 1:00pm Location: 90-3122 Seminar Host/Point of Contact: Mark Mendell Guidelines for health-based ventilation in Europe are proposed. They follow the premise of controlling exposures to indoor air pollutants of both indoor and outdoor origin. Exposures are controlled through a two-step sequential approach, in which source control is the primary strategy, while ventilation is the secondary strategy once all options for source control have been fully implemented. World Health Organization (WHO) air quality (AQ) guidelines are used to set the exposure limits. A decision diagram is created for guidance through the process of source control and to aid in

351

Influence of ventilation arrangements on particle removal in industrial cleanrooms with various tool coverage  

Science Journals Connector (OSTI)

This paper aims to investigate the influence of comparative ventilation arrangements (wall-return, locally balanced ceiling-return, and four-way ceiling-return) on the airflow distribution and particle fates w...

Yun-Chun Tung; Shih-Cheng Hu; Tengfang Xu; Ren-Huei Wang

2010-03-01T23:59:59.000Z

352

Behavior of a Nuclear Power Plant Ventilation Stack for Wind Loads  

Science Journals Connector (OSTI)

This paper describes behavior of self supporting tall reinforced concrete (RC) ventilation stack of a nuclear power plant (NPP) for wind loads. Since the static and equivalent dynamic wind loads are inter-dependa...

V. Venkatachalapathy

2012-05-01T23:59:59.000Z

353

Experimental Study of the Floor Radiant Cooling System Combined with Displacement Ventilation  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency, Vol. IV-11-4 Experimental Study of the Floor Radiant Cooling System Combined with Displacement Ventilation Yanli Ren1, Deying Li2, Yufeng Zhang1 1...

Ren, Y.; Li, D.; Zhang, Y.

2006-01-01T23:59:59.000Z

354

Modeling Ventilation in Multifamily Buildings John Markley, University of California, Davis -Western Cooling Efficiency Center  

E-Print Network [OSTI]

Modeling Ventilation in Multifamily Buildings John Markley, University of California, Davis outlines the results from energy models of several multifamily building configurations to improve airflow component of multifamily building design due to its effects on occupant health and comfort. Though

California at Davis, University of

355

Workers Remove Glove Boxes from Ventilation at Hanford’s Plutonium Finishing Plant  

Broader source: Energy.gov [DOE]

An employee at Hanford’s Plutonium Finishing Plant uses a portable band saw to cut the last ventilation duct attached to glove boxes inside the facility’s former processing area.

356

HOSPITAL VENTILATION STANDARDS AND ENERGY CONSERVATION: CHEMICAL CONTAMINATION OF HOSPITAL AIR. FINAL REPORT.  

E-Print Network [OSTI]

LBL-10475 EEB-Hosp 79-6 HOSPITAL VENTILATION STANDARDS ANDCHH1ICAL CONTAMINATION OF HOSPITAL AIR na 1 Report DavidMinnesota 55455 TWIN CITIES HOSPITAL VEtHILATION STANDARDS

Rainer, David

2012-01-01T23:59:59.000Z

357

Integrated Demand Controlled Ventilation for Single Duct VAV System with Conference Rooms  

E-Print Network [OSTI]

. This paper presents a new integrated demand controlled ventilation (IDCV) methodology which can ensure acceptable IAQ and energy savings with lower OA intake ratio. The requirement on hardware and software is simple and the implementation is easy. One office...

Yu, Y.; Liu, M.; Cho, Y.; Xu, K.

2007-01-01T23:59:59.000Z

358

INDOOR AIR QUALITY AND ENERGY EFFICIENT VENTILATION RATES AT A NEW YORK CITY ELEMENTARY SCHOOL  

E-Print Network [OSTI]

UC-95d INDOOR AIR QUALITY AND ENERGY EFFICIENT VENTILATIONVentilation on Indoor Air Quality and Energy Use in Schoo s,EEB~Vent INDOOR AIR QUALITY AND ENERGY EFFICIENT VENTILATION

Young, Rodger A.

2013-01-01T23:59:59.000Z

359

The Potential for Wind Induced Ventilation to Meet Occupant Comfort Conditions  

E-Print Network [OSTI]

This paper describes a simple graphic tool that enables a building designer to evaluate the potential for wind induced ventilation cooling in several climate zones. Long term weather data were analyzed to determine the conditions for which available...

Byrne, S. J.; Huang, Y. J.; Ritschard, R. L.; Foley, D. M.

1985-01-01T23:59:59.000Z

360

Economizer system cost effectiveness: Accounting for the influence of ventilation rate on sick leave  

SciTech Connect (OSTI)

This study estimated the health, energy, and economic benefits of an economizer ventilation control system that increases outside air supply during mild weather to save energy. A model of the influence of ventilation rate on airborne transmission of respiratory illnesses was used to extend the limited data relating ventilation rate with illness and sick leave. An energy simulation model calculated ventilation rates and energy use versus time for an office building in Washington, DC with fixed minimum outdoor air supply rates, with and without an economizer. Sick leave rates were estimated with the disease transmission model. In the modeled 72-person office building, our analyses indicate that the economizer reduces energy costs by approximately $2000 and, in addition, reduces sick leave. The financial benefit of the decrease in sick leave is estimated to be between $6,000 and $16,000. This modelling suggests that economizers are much more cost effective than currently recognized.

Fisk, William J.; Seppanen, Olli; Faulkner, David; Huang, Joe

2003-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

A Method for Evaluating the Application of Variable Frequency Drives with Coal Mine Ventilation Fans.  

E-Print Network [OSTI]

??The adjustable-pitch setting on an axial-flow fan is the most common method of controlling airflow for primary coal mine ventilation. With this method, the fan… (more)

Murphy, Tyson M.

2006-01-01T23:59:59.000Z

362

Control of the microclimate around the head with opposing jet local ventilation  

E-Print Network [OSTI]

ventilation application. Healthy Buildings 2003, Singapore.21 (1996) 427-436. Healthy Buildings 2009, September 13-17,distance is 1.20m. Healthy Buildings 2009, September 13-17,

Liu, Chonghui; Higuchi, Hiroshi; Arens, Edward; Zhang, Hui Ph.D

2009-01-01T23:59:59.000Z

363

Energy and air quality implications of passive stack ventilation in residential buildings  

E-Print Network [OSTI]

scaling the passive stack diameter with house size (floora single-story house ventilated by a passive stack with andTable 1: Passive stack diameters scaling with house size

Mortensen, Dorthe Kragsig

2011-01-01T23:59:59.000Z

364

Waste-heat recovery in batch processes using heat storage  

SciTech Connect (OSTI)

The waste-heat recovery in batch processes has been studied using the pinch-point method. The aim of the work has been to investigate theoretical and practical approaches to the design of heat-exchanger networks, including heat storage, for waste-heat recovery in batch processes. The study is limited to the incorporation of energy-storage systems based on fixed-temperature variable-mass stores. The background for preferring this to the alternatives (variable-temperature fixed-mass and constant-mass constant-temperature (latent-heat) stores) is given. It is shown that the maximum energy-saving targets as calculated by the pinch-point method (time average model, TAM) can be achieved by locating energy stores at either end of each process stream. This theoretically large number of heat-storage tanks (twice the number of process streams) can be reduced to just a few tanks. A simple procedure for determining a number of heat-storage tanks sufficient to achieve the maximum energy-saving targets as calculated by the pinch-point method is described. This procedure relies on combinatorial considerations, and could therefore be labeled the combinatorial method for incorporation of heat storage in heat-exchanger networks. Qualitative arguments justifying the procedure are presented. For simple systems, waste-heat recovery systems with only three heat-storage temperatures (a hot storage, a cold storage, and a heat store at the pinch temperature) often can achieve the maximum energy-saving targets. Through case studies, six of which are presented, it is found that a theoretically large number of heat-storage tanks (twice the number of process streams) can be reduced to just a few tanks. The description of these six cases is intended to be sufficiently detailed to serve as benchmark cases for development of alternative methods.

Stoltze, S.; Mikkelsen, J.; Lorentzen, B.; Petersen, P.M.; Qvale, B. [Technical Univ. of Denmark, Lyngby (Denmark). Lab. for Energetics

1995-06-01T23:59:59.000Z

365

heat pump | OpenEI  

Open Energy Info (EERE)

heat pump heat pump Dataset Summary Description View 2010 energy efficiency data from AeroSys Inc, Coaire, Cold Point, First Operations, LG Electronics, Nordyne, and Quietside manufacturers. Data includes cooling capacity, cooling performance, heating capacity, and heating performance. Spreadsheet was created by combining the tables in pdf files that are included in the zip file. Source Energy Applicance Data - United States Federal Trade Commission, www.ftc.gov Date Released Unknown Date Updated Unknown Keywords air conditioner central air conditioner efficiency efficient energy heat pump Data application/vnd.ms-excel icon 2010_CentralAC_All.xls (xls, 82.4 KiB) application/zip icon 2010CentralAirConditioner.zip (zip, 398.2 KiB) Quality Metrics Level of Review Some Review

366

Effect of outside air ventilation rate on VOC concentrations and emissions  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Effect of outside air ventilation rate on VOC concentrations and emissions Effect of outside air ventilation rate on VOC concentrations and emissions in a call center Title Effect of outside air ventilation rate on VOC concentrations and emissions in a call center Publication Type Conference Proceedings Year of Publication 2002 Authors Hodgson, Alfred T., David Faulkner, Douglas P. Sullivan, Dennis L. DiBartolomeo, Marion L. Russell, and William J. Fisk Conference Name Proceedings of the Indoor Air 2002 Conference, Monterey, CA Volume 2 Pagination 168-173 Publisher Indoor Air 2002, Santa Cruz, CA Abstract A study of the relationship between outside air ventilation rate and concentrations of VOCs generated indoors was conducted in a call center. Ventilation rates were manipulated in the building's four air handling units (AHUs). Concentrations of VOCs in the AHU returns were measured on 7 days during a 13- week period. Indoor minus outdoor concentrations and emission factors were calculated. The emission factor data was subjected to principal component analysis to identify groups of co-varying compounds based on source type. One vector represented emissions of solvents from cleaning products. Another vector identified occupant sources. Direct relationships between ventilation rate and concentrations were not observed for most of the abundant VOCs. This result emphasizes the importance of source control measures for limiting VOC concentrations in buildings

367

Appendix F Cultural Resources, Including  

Broader source: Energy.gov (indexed) [DOE]

Appendix F Appendix F Cultural Resources, Including Section 106 Consultation STATE OF CALIFORNIA - THE RESOURCES AGENCY EDMUND G. BROWN, JR., Governor OFFICE OF HISTORIC PRESERVATION DEPARTMENT OF PARKS AND RECREATION 1725 23 rd Street, Suite 100 SACRAMENTO, CA 95816-7100 (916) 445-7000 Fax: (916) 445-7053 calshpo@parks.ca.gov www.ohp.parks.ca.gov June 14, 2011 Reply in Reference To: DOE110407A Angela Colamaria Loan Programs Office Environmental Compliance Division Department of Energy 1000 Independence Ave SW, LP-10 Washington, DC 20585 Re: Topaz Solar Farm, San Luis Obispo County, California Dear Ms. Colamaria: Thank you for seeking my consultation regarding the above noted undertaking. Pursuant to 36 CFR Part 800 (as amended 8-05-04) regulations implementing Section

368

Energy saving strategies with personalized ventilation in tropics  

E-Print Network [OSTI]

office”. The equipment loads follow the schedules of theand the equipment heat load follow the profile shown inload was 10 W/m 2 and it follows the load shown in Table 1.

Schiavon, Stefano; Melikov, Arsen; Chandra Sekhar, Chandra Sekhar

2010-01-01T23:59:59.000Z

369

Energy saving strategies with personalized ventilation in tropics  

E-Print Network [OSTI]

is extracted by the fan coil units from the room in 1 year (a two-pipe overhead fan coil unit, is used to keep the roomto the room through the fan coil unit. There is no heating

Schiavon, Stefano; Melikov, Arsen; Chandra Sekhar, Chandra Sekhar

2010-01-01T23:59:59.000Z

370

Low temperature barriers with heat interceptor wells for in situ processes  

DOE Patents [OSTI]

A system for reducing heat load applied to a frozen barrier by a heated formation is described. The system includes heat interceptor wells positioned between the heated formation and the frozen barrier. Fluid is positioned in the heat interceptor wells. Heat transfers from the formation to the fluid to reduce the heat load applied to the frozen barrier.

McKinzie, II, Billy John (Houston, TX)

2008-10-14T23:59:59.000Z

371

Indoor unit for electric heat pump  

DOE Patents [OSTI]

An indoor unit for an electric heat pump is provided in modular form including a refrigeration module, an air mover module, and a resistance heat package module, the refrigeration module including all of the indoor refrigerant circuit components including the compressor in a space adjacent the heat exchanger, the modules being adapted to be connected to air flow communication in several different ways as shown to accommodate placement of the unit in various orientations. 9 figs.

Draper, R.; Lackey, R.S.; Fagan, T.J. Jr.; Veyo, S.E.; Humphrey, J.R.

1984-05-22T23:59:59.000Z

372

Countries Gasoline Prices Including Taxes  

Gasoline and Diesel Fuel Update (EIA)

Countries (U.S. dollars per gallon, including taxes) Countries (U.S. dollars per gallon, including taxes) Date Belgium France Germany Italy Netherlands UK US 01/13/14 7.83 7.76 7.90 8.91 8.76 8.11 3.68 01/06/14 8.00 7.78 7.94 8.92 8.74 8.09 3.69 12/30/13 NA NA NA NA NA NA 3.68 12/23/13 NA NA NA NA NA NA 3.63 12/16/13 7.86 7.79 8.05 9.00 8.78 8.08 3.61 12/9/13 7.95 7.81 8.14 8.99 8.80 8.12 3.63 12/2/13 7.91 7.68 8.07 8.85 8.68 8.08 3.64 11/25/13 7.69 7.61 8.07 8.77 8.63 7.97 3.65 11/18/13 7.99 7.54 8.00 8.70 8.57 7.92 3.57 11/11/13 7.63 7.44 7.79 8.63 8.46 7.85 3.55 11/4/13 7.70 7.51 7.98 8.70 8.59 7.86 3.61 10/28/13 8.02 7.74 8.08 8.96 8.79 8.04 3.64 10/21/13 7.91 7.71 8.11 8.94 8.80 8.05 3.70 10/14/13 7.88 7.62 8.05 8.87 8.74 7.97 3.69

373

Wastewater heat recovery apparatus  

DOE Patents [OSTI]

A heat recovery system is described with a heat exchanger and a mixing valve. A drain trap includes a heat exchanger with an inner coiled tube, baffle plate, wastewater inlet, wastewater outlet, cold water inlet, and preheated water outlet. Wastewater enters the drain trap through the wastewater inlet, is slowed and spread by the baffle plate, and passes downward to the wastewater outlet. Cold water enters the inner tube through the cold water inlet and flows generally upward, taking on heat from the wastewater. This preheated water is fed to the mixing valve, which includes a flexible yoke to which are attached an adjustable steel rod, two stationary zinc rods, and a pivoting arm. The free end of the arm forms a pad which rests against a valve seat. The rods and pivoting arm expand or contract as the temperature of the incoming preheated water changes. The zinc rods expand more than the steel rod, flexing the yoke and rotating the pivoting arm. The pad moves towards the valve seat as the temperature of the preheated water rises, and away as the temperature falls, admitting a variable amount of hot water to maintain a nearly constant average process water temperature. 6 figs.

Kronberg, J.W.

1992-09-01T23:59:59.000Z

374

Wastewater heat recovery apparatus  

DOE Patents [OSTI]

A heat recovery system with a heat exchanger and a mixing valve. A drain trap includes a heat exchanger with an inner coiled tube, baffle plate, wastewater inlet, wastewater outlet, cold water inlet, and preheated water outlet. Wastewater enters the drain trap through the wastewater inlet, is slowed and spread by the baffle plate, and passes downward to the wastewater outlet. Cold water enters the inner tube through the cold water inlet and flows generally upward, taking on heat from the wastewater. This preheated water is fed to the mixing valve, which includes a flexible yoke to which are attached an adjustable steel rod, two stationary zinc rods, and a pivoting arm. The free end of the arm forms a pad which rests against a valve seat. The rods and pivoting arm expand or contract as the temperature of the incoming preheated water changes. The zinc rods expand more than the steel rod, flexing the yoke and rotating the pivoting arm. The pad moves towards the valve seat as the temperature of the preheated water rises, and away as the temperature falls, admitting a variable amount of hot water to maintain a nearly constant average process water temperature.

Kronberg, James W. (108 Independent Blvd., Aiken, SC 29801)

1992-01-01T23:59:59.000Z

375

Geothermal district heating systems  

SciTech Connect (OSTI)

Ten district heating demonstration projects and their present status are described. The projects are Klamath County YMCA, Susanville District Heating, Klamath Falls District Heating, Reno Salem Plaza Condominium, El Centro Community Center Heating/Cooling, Haakon School and Business District Heating, St. Mary's Hospital, Diamond Ring Ranch, Pagosa Springs District Heating, and Boise District Heating.

Budney, G.S.; Childs, F.

1982-01-01T23:59:59.000Z

376

Analysis of conjugate heat transfer in tube-in-block heat exchangers for some engineering applications.  

E-Print Network [OSTI]

??This project studied the effect of different parameters on the conjugate heat transfer in tube-in-block heat exchangers for various engineering applications. These included magnetic coolers… (more)

Gari, Abdullatif Abdulhadi

2006-01-01T23:59:59.000Z

377

Enhanced Joule Heating in Umbral Dots  

E-Print Network [OSTI]

We present a study of magnetic profiles of umbral dots (UDs) and its consequences on the Joule heating mechanisms. Hamedivafa (2003) studied Joule heating using vertical component of magnetic field. In this paper UDs magnetic profile has been investigated including the new azimuthal component of magnetic field which might explain the relatively larger enhancement of Joule heating causing more brightness near circumference of UD.

Chandan Joshi; Lokesh Bharti; S. N. A. Jaaffrey

2007-05-08T23:59:59.000Z

378

Waste Heat Recapture from Supermarket Refrigeration Systems  

SciTech Connect (OSTI)

The objective of this project was to determine the potential energy savings associated with improved utilization of waste heat from supermarket refrigeration systems. Existing and advanced strategies for waste heat recovery in supermarkets were analyzed, including options from advanced sources such as combined heat and power (CHP), micro-turbines and fuel cells.

Fricke, Brian A [ORNL

2011-11-01T23:59:59.000Z

379

Laminated insulators having heat dissipation means  

DOE Patents [OSTI]

A laminated body is provided with heat dissipation capabilities. The insulator body is formed by dielectric layers interleaved with heat conductive layers, and bonded by an adhesive to form a composite structure. The heat conductive layers include provision for connection to an external thermal circuit.

Niemann, R.C.; Mataya, K.F.; Gonczy, J.D.

1980-04-24T23:59:59.000Z

380

Method for heating a glass sheet  

DOE Patents [OSTI]

A method for heating a glass sheet includes the steps of heating a glass sheet to a first predetermined temperature and applying microwave energy to the glass sheet to heat the glass sheet to at least a second predetermined temperature to allow the glass sheet to be formed.

Boaz, Premakaran Tucker (Livonia, MI)

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Methods for forming wellbores in heated formations  

DOE Patents [OSTI]

A method for forming a wellbore in a heated formation includes flowing liquid cooling fluid to a bottom hole assembly in a wellbore in a heated formation. At least a portion of the liquid cooling fluid is vaporized at or near a region to be cooled. Vaporizing the liquid cooling fluid absorbs heat from the region to be cooled.

Guimerans, Rosalvina Ramona; Mansure, Arthur James

2012-09-25T23:59:59.000Z

382

Carbothermic reduction with parallel heat sources  

DOE Patents [OSTI]

Disclosed are apparatus and method of carbothermic direct reduction for producing an aluminum alloy from a raw material mix including aluminum oxide, silicon oxide, and carbon wherein parallel heat sources are provided by a combustion heat source and by an electrical heat source at essentially the same position in the reactor, e.g., such as at the same horizontal level in the path of a gravity-fed moving bed in a vertical reactor. The present invention includes providing at least 79% of the heat energy required in the process by the electrical heat source.

Troup, Robert L. (Murrysville, PA); Stevenson, David T. (Washington Township, Washington County, PA)

1984-12-04T23:59:59.000Z

383

Changing Ventilation Rates in U.S. Offices: Implications for Health, Work  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Changing Ventilation Rates in U.S. Offices: Implications for Health, Work Changing Ventilation Rates in U.S. Offices: Implications for Health, Work Performance, Energy, and Associated Economics Title Changing Ventilation Rates in U.S. Offices: Implications for Health, Work Performance, Energy, and Associated Economics Publication Type Journal Article Refereed Designation Refereed LBNL Report Number LBNL-5035E Year of Publication 2012 Authors Fisk, William J., Douglas R. Black, and Gregory Brunner Journal Building and Environment Volume 47 Pagination 368-372 Date Published 01/2012 Keywords cost-benefit analysis, economizer, health, office, ventilation rate, work performance Abstract This paper provides quantitative estimates of benefits and costs of providing different amounts of outdoor air ventilation in U.S. offices. For four scenarios that modify ventilation rates, we estimated changes in sick building syndrome (SBS) symptoms, work performance, short-term absence, and building energy consumption. The estimated annual economic benefits were $13 billion from increasing minimum ventilation rates (VRs) from 8 to 10 L/s per person, $38 billion from increasing minimum VRs from 8 to 15 L/s per person, and $33 billion from increasing VRs by adding outdoor air economizers for the 50% of the office floor area that currently lacks economizers. The estimated $0.04 billion in annual energy-related benefits of decreasing minimum VRs from 8 to 6.5 L/s per person are very small compared to the projected annual costs of $12 billion. Benefits of increasing minimum VRs far exceeded energy costs while adding economizers yielded health, performance, and absence benefits with energy savings.

384

Optimization of Ventilation Energy Demands and Indoor Air Quality in High-Performance Homes  

SciTech Connect (OSTI)

High-performance homes require that ventilation energy demands and indoor air quality (IAQ) be simultaneously optimized. We attempted to bridge these two areas by conducting tests in a research house located in Oak Ridge, TN, that was 20 months old, energy-efficient (i.e., expected to consume 50% less energy than a house built per the 2006 IRC), tightly-built (i.e., natural ventilation rate ~0.02 h-1), unoccupied, and unfurnished. We identified air pollutants of concern in the test home that could generally serve as indicators of IAQ, and conduced field experiments and computer simulations to determine the effectiveness and energy required by various techniques that lessened the concentration of these contaminants. Formaldehyde was selected as the main pollutant of concern among the contaminants that were sampled in the initial survey because it was the only compound that showed concentrations that were greater than the recommended exposure levels. Field data indicate that concentrations were higher during the summer primarily because emissions from sources rise with increases in temperature. Furthermore, supply ventilation and gas-phase filtration were effective means to reduce formaldehyde concentrations; however, exhaust ventilation had minimal influence on this pollutant. Results from simulations suggest that formaldehyde concentrations obtained while ventilating per ASHRAE 62.2-2010 could be decreased by about 20% from May through September through three strategies: 1) increasing ASHRAE supply ventilation by a factor of two, 2) reducing the thermostat setpoint from 76 to 74 F, or 3) running a gas-phase filtration system while decreasing supply ventilation per ASHRAE by half. In the mixed-humid climate of Oak Ridge, these strategies caused increases in electricity cost of ~$5 to ~$15/month depending on outdoor conditions.

Hun, Diana E [ORNL; Jackson, Mark C [University of Texas at Austin; Shrestha, Som S [ORNL

2014-01-01T23:59:59.000Z

385

Heat transfer and heat exchangers reference handbook  

SciTech Connect (OSTI)

The purpose of this handbook is to provide Rocky Flats personnel with an understanding of the basic concepts of heat transfer and the operation of heat exchangers.

Not Available

1991-01-15T23:59:59.000Z

386

DOE Zero Energy Ready Home: Ventilation and Filtration Strategies with Indoor airPLUS Webinar (Text Version)  

Broader source: Energy.gov [DOE]

Below is the text version of the webinar, DOE Zero Energy Ready Home: Ventilation and Filtration Strategies with Indoor airPLUS, presented in August 2014.

387

Heat exchanger  

DOE Patents [OSTI]

A heat exchanger comparising a shell attached at its open end to one side of a tube sheet and a detachable head connected to the other side of said tube sheet. The head is divided into a first and second chamber in fluid communication with a nozzle inlet and nozzle outlet, respectively, formed in said tube sheet. A tube bundle is mounted within said shell and is provided with inlets and outlets formed in said tube sheet in communication with said first and second chambers, respectively.

Brackenbury, Phillip J. (Richland, WA)

1986-01-01T23:59:59.000Z

388

Heat exchanger  

DOE Patents [OSTI]

A heat exchanger comparising a shell attached at its open end to one side of a tube sheet and a detachable head connected to the other side of said tube sheet. The head is divided into a first and second chamber in fluid communication with a nozzle inlet and nozzle outlet, respectively, formed in said tube sheet. A tube bundle is mounted within said shell and is provided with inlets and outlets formed in said tube sheet in communication with said first and second chambers, respectively.

Brackenbury, P.J.

1983-12-08T23:59:59.000Z

389

[Waste water heat recovery system]. Final report, September 30, 1992  

SciTech Connect (OSTI)

The production capabilities for and field testing of the heat recovery system are described briefly. Drawings are included.

Not Available

1993-04-28T23:59:59.000Z

390

Cleanup and Dismantling of Highly Contaminated Ventilation Systems Using Robotic Tools - 13162  

SciTech Connect (OSTI)

The UP1 plant reprocessed nearly 20,000 tons of used natural uranium gas cooled reactor fuel coming from the first generation of civil nuclear reactors in France. Following operating incidents in the eighties, the ventilation system of the continuous dissolution line facility was shut down and replaced. Two types of remote controlled tool carriers were developed to perform the decontamination and dismantling operations of the highly contaminated ventilation duct network. The first one, a dedicated small robot, was designed from scratch to retrieve a thick powder deposit within a duct. The robot, managed and confined by two dedicated glove boxes, was equipped for intervention inside the ventilation duct and used for carrying various cleanup and inspection tools. The second type, consisting of robotic tools developed on the base of an industrial platform, was used for the clean-up and dismantling of the ventilation duct system. Depending on the type of work to be performed, on the shape constraints of the rooms and any equipment to be dismantled, different kinds of robotic tools were developed and installed on a Brokk 40 carrier. After more than ten years of ventilation duct D and D operations at the UP1 plant, a lot of experience was acquired about remote operations. The three main important lessons learned in terms of remote controlled operation are: characterizing the initial conditions as much as reasonably possible, performing non-radioactive full scale testing and making it as simple and modular as possible. (authors)

Chambon, Frederic [AREVA FEDERAL SERVICES, Columbia MD (United States)] [AREVA FEDERAL SERVICES, Columbia MD (United States); CIZEL, Jean-Pierre [AREVA BE/NV, Marcoule (France)] [AREVA BE/NV, Marcoule (France); Blanchard, Samuel [CEA DEN/DPAD, Marcoule (France)] [CEA DEN/DPAD, Marcoule (France)

2013-07-01T23:59:59.000Z

391

Assessment of Indoor Air Quality Benefits and Energy Costs of Mechanical Ventilation  

SciTech Connect (OSTI)

Intake of chemical air pollutants in residences represents an important and substantial health hazard. Sealing homes to reduce air infiltration can save space conditioning energy, but can also increase indoor pollutant concentrations. Mechanical ventilation ensures a minimum amount of outdoor airflow that helps reduce concentrations of indoor emitted pollutants while requiring some energy for fan(s) and thermal conditioning of the added airflow. This work demonstrates a physics based, data driven modeling framework for comparing the costs and benefits of whole-house mechanical ventilation and applied the framework to new California homes. The results indicate that, on a population basis, the health benefits from reduced exposure to indoor pollutants in New California homes are worth the energy costs of adding mechanical ventilation as specified by ASHRAE Standard 62.2.This study determines the health burden for a subset of pollutants in indoor air and the costs and benefits of ASHRAE's mechanical ventilation standard (62.2) for new California homes. Results indicate that, on a population basis, the health benefits of new home mechanical ventilation justify the energy costs.

Logue, J.M.; Price, P.N.; Sherman, M.H.; Singer, B.C.

2011-07-01T23:59:59.000Z

392

Heat exchanger with ceramic elements  

DOE Patents [OSTI]

An annular heat exchanger assembly includes a plurality of low thermal growth ceramic heat exchange members with inlet and exit flow ports on distinct faces. A mounting member locates each ceramic member in a near-annular array and seals the flow ports on the distinct faces into the separate flow paths of the heat exchanger. The mounting member adjusts for the temperature gradient in the assembly and the different coefficients of thermal expansion of the members of the assembly during all operating temperatures.

Corey, John A. (North Troy, NY)

1986-01-01T23:59:59.000Z

393

Building America Top Innovations Hall of Fame Profile … Outside Air Ventilation Controller  

Broader source: Energy.gov (indexed) [DOE]

partner Davis Energy partner Davis Energy Group worked with Monley Cronin Construction to build 100 energy-efficient homes in Woodland, CA, with night- cooling ventilation systems. BUILDING AMERICA TOP INNOVATIONS HALL OF FAME PROFILE INNOVATIONS CATEGORY: 1. Advanced Technologies and Practices 1.3 Assured Health, Safety, and Durability Outside Air Ventilation Controller Building America researchers developed technologies to harness the natural day-night temperature swings in the U.S. Southwest to cut cooling energy peak demand with no compromise in comfort. Building America research has shown that, in dry climates, the use of ventilation cooling can significantly reduce, delay, or completely eliminate air conditioner operation resulting in both energy savings and reduction of peak demand

394

Integrated solar heating unit  

SciTech Connect (OSTI)

This patent describes an integral solar heating unit with an integral solar collector and hot water storage system, the unit comprising: (a) a housing; (b) a flat plate solar collector panel mounted in the housing and having a generally horizontal upper edge and an uninsulated, open back surface; (c) a cylindrical hot water tank operatively connected to the solar collector panel and mounted in the housing generally parallel to and adjacent to the upper edge; (d) the housing comprising a hood around the tank a pair of side skirts extending down at the sides of the panel. The hood and side skirts terminate at lower edges which together substantially define a plane such that upon placing the heating unit on a generally planar surface, the housing substantially encapsulates the collector panel and hot water tank in a substantially enclosed air space; (e) the collector including longitudinally extended U-shaped collector tubes and a glazed window to pass radiation through to the collector tubes, and a first cold water manifold connected to the tubes for delivering fresh water thereto and a second hot water manifold connected to the tubes to remove heated water therefrom. The manifolds are adjacent and at least somewhat above and in direct thermal contact with the tank; and, (f) the skirts and hood lapping around the collector panel, exposing only the glazed window, such that everything else in the heating unit is enclosed by the housing such that heat emanating from the uninsulated, open back face of the collector and tank is captured and retained by the housing to warm the manifolds.

Larkin, W.J.

1987-01-20T23:59:59.000Z

395

Particle deposition in ventilation ducts: Connectors, bends anddeveloping flow  

SciTech Connect (OSTI)

In ventilation duct flow the turbulent flow profile is commonly disturbed or not fully developed and these conditions are likely to influence particle deposition to duct surfaces. Particle deposition rates at eight S-connectors, in two 90{sup o} duct bends and in two ducts where the turbulent flow profile was not fully developed were measured in a laboratory duct system with both galvanized steel and internally insulated ducts with hydraulic diameters of 15.2 cm. In the steel duct system, experiments with nominal particle diameters of 1, 3, 5, 9 and 16 {micro}m were conducted at each of three nominal air speeds: 2.2, 5.3 and 9.0 m/s. In the insulated duct system, deposition of particles with nominal diameters of 1, 3, 5, 8 and 13 {micro}m was measured at nominal air speeds of 2.2, 5.3 and 8.8 m/s. Fluorescent techniques were used to directly measure the deposition velocities of monodisperse fluorescent particles to duct surfaces. Deposition at S-connectors, in bends and in straight ducts with developing turbulence was often greater than deposition in straight ducts with fully developed turbulence for equal particle sizes, air speeds and duct surface orientations. Deposition rates at all locations were found to increase with an increase in particle size or air speed. High deposition rates at S-connectors resulted from impaction and these rates were nearly independent of the orientation of the S-connector. Deposition rates in the two 90{sup o} bends differed by more than an order of magnitude in some cases, probably because of the difference in turbulence conditions at the bend inlets. In straight steel ducts where the turbulent flow profile was developing, the deposition enhancement relative to fully developed turbulence generally increased with air speed and decreased with downstream distance from the duct inlet. This enhancement was greater at the duct ceiling and wall than at the duct floor. In insulated ducts, deposition enhancement was less pronounced overall than in steel ducts. Trends that were observed in steel ducts were present, but weaker, in insulated ducts.

Sippola, Mark R.; Nazaroff, William W.

2004-03-01T23:59:59.000Z

396

Feasibility study of heat pumps for waste heat recovery in industry.  

E-Print Network [OSTI]

??Includes abstract. A case study was thus carried out at an applicable local industry (brewery) to assess the feasibility of implementing the heat pump for… (more)

De Waal, Devin.

2012-01-01T23:59:59.000Z

397

ADMINISTRATIVE AND ENGINEERING CONTROLS FOR THE OPERATION OF VENTILATION SYSTEMS FOR UNDERGROUND RADIOACTIVE WASTE STORAGE TANKS  

SciTech Connect (OSTI)

Liquid radioactive wastes from the Savannah River Site are stored in large underground carbon steel tanks. The majority of the waste is confined in double shell tanks, which have a primary shell, where the waste is stored, and a secondary shell, which creates an annular region between the two shells, that provides secondary containment and leak detection capabilities should leakage from the primary shell occur. Each of the DST is equipped with a purge ventilation system for the interior of the primary shell and annulus ventilation system for the secondary containment. Administrative flammability controls require continuous ventilation to remove hydrogen gas and other vapors from the waste tanks while preventing the release of radionuclides to the atmosphere. Should a leak from the primary to the annulus occur, the annulus ventilation would also serve this purpose. The functionality of the annulus ventilation is necessary to preserve the structural integrity of the primary shell and the secondary. An administrative corrosion control program is in place to ensure integrity of the tank. Given the critical functions of the purge and annulus ventilation systems, engineering controls are also necessary to ensure that the systems remain robust. The system consists of components that are constructed of metal (e.g., steel, stainless steel, aluminum, copper, etc.) and/or polymeric (polypropylene, polyethylene, silicone, polyurethane, etc.) materials. The performance of these materials in anticipated service environments (e.g., normal waste storage, waste removal, etc.) was evaluated. The most aggressive vapor space environment occurs during chemical cleaning of the residual heels by utilizing oxalic acid. The presence of NO{sub x} and mercury in the vapors generated from the process could potentially accelerate the degradation of aluminum, carbon steel, and copper. Once identified, the most susceptible materials were either replaced and/or plans for discontinuing operations are executed.

Wiersma, B.; Hansen, A.

2013-11-13T23:59:59.000Z

398

Microsoft Word - Draft Pier Final Report DCV and Classroom ventilation 05-11-12  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Demand Controlled Ventilation and Classroom Ventilation William J. Fisk, Mark J. Mendell, Molly Davies, Ekaterina Eliseeva, David Faulkner, Tienzen Hong, Douglas P. Sullivan Indoor Environment Group Energy Analysis and Environmental Impacts Department Lawrence Berkeley National Laboratory Berkeley, CA 94720 May 2012 This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Building Technologies Program of the U.S. Department of Energy under contract DE-AC02- 05CH11231. LBNL-6258E 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

399

Consideration of air jet angle in open surface tank push-pull ventilation system design  

E-Print Network [OSTI]

CONSIDERATION OF AIR JET ANGLE IN OPEN SURFACE TANK PUSH-PULL VENTILATION SYSTEM DESIGN A Thesis by WAI-HUNG DAVID CHAN Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree o... MASTER OF SCIENCE May 1983 Major Subjeot: Industrial Hygiene CONSIDERATION OF AIR JET ANGLE IN OPEN SURFACE TANK PUSH-PULL VENTILATION STSTEM DESIGN A Thesis by WAI-HUNG DAVID CHAN Approved as to style and content by: (C an of mmittee) J. Suggs...

Chan, Wai-Hung David

1983-01-01T23:59:59.000Z

400

New Air Cleaning Strategies for Reduced Commercial Building Ventilation Energy ? FY11 Final Report  

SciTech Connect (OSTI)

The research carried out in this project focuses on developing novel volatile organic compounds (VOCs) air cleaning technologies needed to enable energy-saving reductions in ventilation rates. we targeted a VOC air cleaning system that could enable a 50% reduction in ventilation rates. In a typical commercial HVAC system that provides a mixture of recirculated and outdoor air, a VOC air cleaner in the supply airstream must have a 15% to 20% VOC removal efficiency to counteract a 50% reduction in outdoor air supply.

Sidheswaran, Meera; Destaillats, Hugo; Cohn, Sebastian; Sullivan, Douglas P.; Fisk, William J.

2011-10-31T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Study on solar chimney used for room natural ventilation in Nanjing  

Science Journals Connector (OSTI)

Abstract The study investigated the performance of solar chimney, which is integrated into a one-story building. A module was developed for and implemented in the Energy Plus program for the simulation and determination of the energy impact of thermal chimneys. The basic concepts, assumptions, and algorithms are implemented into the Energy Plus program to predict the performance of a solar chimney. The results showed that in Nanjing 45° is found to be optimum for obtaining maximum rate of ventilation and the rate of ventilation increases with increase of the ratio between height of absorber and gap between glass and absorber. This finding is in agreement with experimental results.

Xu Jianliu; Liu Weihua

2013-01-01T23:59:59.000Z

402

Heat transfer analysis in Stirling engine heat input system  

SciTech Connect (OSTI)

One of the major factor in commercialization of Stirling engine is mass productivity, and the heat input system including tubular heater is one of the obstacles to mass production because of its complexity in shape and difficulty in manufacturing, which resulted from using oxidation-resistant, low-creep alloys which are not easy to machine and weld. Therefore a heater heat exchanger which is very simple in shape and easy to make has been devised, and a burner system appropriate to this heater also has been developed. In this paper specially devised heat input system which includes a heater shell shaped like U-cup and a flame tube located in the heater shell is analyzed in point of heat transfer processes to find optimum heat transfer. To enhance the heat transfer from the flame tube to the heater shell wall, it is required that the flame tube diameter be enlarged as close to the heater shell diameter as possible, and the flame tube temperature be raised as high as possible. But the enlargement of the flame tube diameter should be restricted by the state of combustion affected by hydraulic resistance of combustion gas, and the boost of the flame tube temperature should be considered carefully in the aspects of the flame tube`s service life.

Chung, W.; Kim, S. [LG Electronics Inc., Seoul (Korea, Republic of). Living System Lab.

1995-12-31T23:59:59.000Z

403

www.heatpumpcentre.org IEA HEAT PUMP PROGRAMME  

E-Print Network [OSTI]

www.heatpumpcentre.org IEA HEAT PUMP PROGRAMME Research, Development, Demonstration and Promotion of Heat Pumping Technology #12;www.heatpumpcentre.org Includes ­ Heating ­ Air conditioning ­ Refrigeration Covers applications in ­ Residential and commercial buildings ­ Industry HEAT PUMPING TECHNOLOGY

Oak Ridge National Laboratory

404

www.heatpumpcentre.or IEA HEAT PUMP PROGRAMME  

E-Print Network [OSTI]

#12;www.heatpumpcentre.or g IEA HEAT PUMP PROGRAMME Research, Development, Demonstration and Promotion of Heat Pumping Technology #12;www.heatpumpcentre.or g Includes ­ Heating ­ Air conditioning ­ Refrigeration Covers applications in ­ Residential and commercial buildings ­ Industry HEAT PUMPING TECHNOLOGY

Oak Ridge National Laboratory

405

In the OSTI Collections: Heat Pumps | OSTI, US Dept of Energy, Office of  

Office of Scientific and Technical Information (OSTI)

Heat Pumps Heat Pumps Heat-Pump Water Heaters Heat Pumps in Heating, Ventilation, and Air Conditioning Systems References Research Organizations Reports Available through OSTI's Information Bridge The particles of any physical system above absolute zero temperature are always moving. The higher the temperature-that is, the hotter the system-the more energetic the particles' motion. As the particles interact with each other, their random motions tend to redistribute the energy more and more equally among themselves all the time, since there are more ways to distribute energy more evenly than there are to distribute it less evenly. This means that the system's temperature becomes more and more uniform throughout-warmer regions tend to cool, and cooler regions tend to warm, as their particles' random motion flows from where the

406

Solar heat collectors. (Latest citations from the US Patent database). Published Search  

SciTech Connect (OSTI)

The bibliography contains selected patents concerning solar heat collector apparatus and systems. Building panels, air conditioning systems, chemical heat pumps, refrigeration systems, and controls are discussed. Applications include residential and commercial building space and water heating, greenhouse heating, and swimming pool heating. (Contains 250 citations and includes a subject term index and title list.)

Not Available

1993-07-01T23:59:59.000Z

407

Design Approach and Performance Analysis of a Small Integrated Heat Pump (IHP) for Net Zero Energy Homes (ZEH)  

SciTech Connect (OSTI)

This paper describes the design and performance analysis of a variable-capacity heat pump system developed for a small [1800ft2 (167 m2)] prototype net ZEH with an average design cooling load of 1.25 tons (4.4 kW) in five selected US climates. The heat pump integrates space heating and cooling, water heating, ventilation, and humidity control (humidification and dehumidification) functions into a single integrated heat pump (IHP) unit. The design approach uses one small variable-capacity compressor to meet all the above functions in an energy efficient manner. Modal performance comparisons to an earlier IHP product are shown relative to the proposed new design for net ZEH application. The annual performance analysis approach using TRNSYS in conjunction with the ORNL Heat Pump Design Model is discussed. Annual performance projections for a range of locations are compared to those of a base system consisting of separate pieces of equipment to perform the same functions. The ZEH IHP is projected to reduce energy use for space heating & cooling, water heating, dehumidification, and ventilation for a net ZEH by about 50% compared to that of the base system.

Rice, C Keith [ORNL; Murphy, Richard W [ORNL; Baxter, Van D [ORNL

2008-01-01T23:59:59.000Z

408

ARM - Measurement - Radiative heating rate  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govMeasurementsRadiative heating rate govMeasurementsRadiative heating rate ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Radiative heating rate The heating rate due to the divergence of long and shortwave radiative flux. Categories Radiometric, Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. External Instruments MOLTS : Model Output Location Time Series Datastreams MOLTS : Model Output Location Time Series Datastreams MOLTSEDASSNDCLASS1 : Model Output Loc. Time Ser. (MOLTS): EDAS

409

ARM - Measurement - Soil heat flux  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

heat flux heat flux ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Soil heat flux A quantity measured according to the formula B = {lambda}(dT/dz), where {lambda} is the conductivity of the soil that the heat is moving through. Categories Surface Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CO2FLX : Carbon Dioxide Flux Measurement Systems EBBR : Energy Balance Bowen Ratio Station SEBS : Surface Energy Balance System External Instruments

410

Heating device for semiconductor wafers  

DOE Patents [OSTI]

An apparatus for heat treating semiconductor wafers is disclosed. The apparatus includes a heating device which contains an assembly of light energy sources for emitting light energy onto a wafer. In particular, the light energy sources are positioned such that many different radial heating zones are created on a wafer being heated. For instance, in one embodiment, the light energy sources form a spiral configuration. In an alternative embodiment, the light energy sources appear to be randomly dispersed with respect to each other so that no discernable pattern is present. In a third alternative embodiment of the present invention, the light energy sources form concentric rings. Tuning light sources are then placed in between the concentric rings of light.

Vosen, Steven R. (Berkeley, CA)

1999-01-01T23:59:59.000Z

411

Heating device for semiconductor wafers  

DOE Patents [OSTI]

An apparatus for heat treating semiconductor wafers is disclosed. The apparatus includes a heating device which contains an assembly of light energy sources for emitting light energy onto a wafer. In particular, the light energy sources are positioned such that many different radial heating zones are created on a wafer being heated. For instance, in one embodiment, the light energy sources form a spiral configuration. In an alternative embodiment, the light energy sources appear to be randomly dispersed with respect to each other so that no discernible pattern is present. In a third alternative embodiment of the present invention, the light energy sources form concentric rings. Tuning light sources are then placed in between the concentric rings of light. 4 figs.

Vosen, S.R.

1999-07-27T23:59:59.000Z

412

Heat Pump for High School Heat Recovery  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China Renewable Energy Resources and a Greener Future Vol.VIII-12-1 Heat Pump for High School Bathroom Heat Recovery Kunrong Huang Hanqing Wang Xiangjiang Zhou Associate professor Professor Professor School...

Huang, K.; Wang, H.; Zhou, X.

2006-01-01T23:59:59.000Z

413

Pagosa Springs District Heating District Heating Low Temperature...  

Open Energy Info (EERE)

Pagosa Springs District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Pagosa Springs District Heating District Heating Low...

414

Boise City Geothermal District Heating District Heating Low Temperatur...  

Open Energy Info (EERE)

Boise City Geothermal District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Boise City Geothermal District Heating District Heating...

415

San Bernardino District Heating District Heating Low Temperature...  

Open Energy Info (EERE)

San Bernardino District Heating District Heating Low Temperature Geothermal Facility Facility San Bernardino District Heating Sector Geothermal energy Type District Heating...

416

Kethcum District Heating District Heating Low Temperature Geothermal...  

Open Energy Info (EERE)

Kethcum District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Kethcum District Heating District Heating Low Temperature Geothermal...

417

Philip District Heating District Heating Low Temperature Geothermal...  

Open Energy Info (EERE)

Philip District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Philip District Heating District Heating Low Temperature Geothermal...

418

Midland District Heating District Heating Low Temperature Geothermal...  

Open Energy Info (EERE)

Midland District Heating District Heating Low Temperature Geothermal Facility Facility Midland District Heating Sector Geothermal energy Type District Heating Location Midland,...

419

Combined Heat and Power, Waste Heat, and District Energy | Department...  

Broader source: Energy.gov (indexed) [DOE]

Combined Heat and Power, Waste Heat, and District Energy Combined Heat and Power, Waste Heat, and District Energy Presentation-given at the Fall 2011 Federal Utility Partnership...

420

Guide to Geothermal Heat Pumps  

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

Geothermal Heat Pumps Work Using a heat exchanger, a geothermal heat pump can move heat from one space to another. In summer, the geothermal heat pump extracts heat from a building...

Note: This page contains sample records for the topic "include heating ventilation" 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

Simulating Natural Ventilation in and Around Buildings by Fast Fluid Mingang Jin1  

E-Print Network [OSTI]

]. It is preferred over mechanical ventilation for sustainable building design. However, the design of natural is a sustainable building technology that can provide a good indoor environment and save energy [1]. These factors should be thoroughly considered at the early stage of building design in order to achieve good

Chen, Qingyan "Yan"

422

Building ventilation : a pressure airflow model computer generation and elements of  

E-Print Network [OSTI]

Building ventilation : a pressure airflow model computer generation and elements of validation H - design #12;1- Introduction Regarding the number of airflow network models found in building publications Abstract : The calculation of airflows is of great importance for detailed building thermal simulation

Paris-Sud XI, Université de

423

SURVEY OF THE EXISTING APPROACHES TO ASSESS AND DESIGN NATURAL VENTILATION AND NEED FOR FURTHER DEVELOPMENTS  

E-Print Network [OSTI]

DEVELOPMENTS Marcello Caciolo, Dominique Marchio, Pascal Stabat Ecole des Mines de Paris- Center for Energy their attention to natural ventilation, due to the potential benefits in terms of energy consumption related - Difference ° Incidence angle of the wind from normal kg / m3 Density Indexes B Buoyancy in Indoor out Outdoor

Boyer, Edmond

424

Experimental study on flow and ventilation behaviours over idealised urban roughness  

Science Journals Connector (OSTI)

Flows in the urban boundary layer (UBL) are strongly affected by the inhomogeneous roughness elements at the bottom surface. In particular, in the near-ground region (roughness sublayer), the effect of the surface roughness dominates that complicates the behaviours of mean flow and turbulence and subsequently the near-wall transport processes. To safeguard the health of urban inhabitants, it is crucial to develop an in-depth understanding of the correlation among near-wall fluid motions, UBL turbulence and city ventilation. However, rather limited information is available. In this study, physical modelling in a laboratory wind tunnel is employed to measure the profiles of both stream-wise and vertical velocities over an array consisting of idealised two-dimensional (2D) roughness elements. Various arrangements are adopted in attempt to cover different flow regimes to examine city ventilation problems. The ventilation performance is measured by the air exchange rate (ACH). Consistent with our previous large-eddy simulation (LES) results, the current wind tunnel measurements suggest that city ventilation is dominated by the ACH turbulent component, i.e., air masses are mainly driven by atmospheric turbulence (at least 80% of the total ACH).

Yat-Kiu Ho; Chun-Ho Liu

2014-01-01T23:59:59.000Z

425

Particle transport in low-energy ventilation systems. Part 1: theory of steady states  

E-Print Network [OSTI]

of the global population. According to the Energy Information Administration (http://www.eia.doe.gov/) the US of this energy is spent on ventilation of buildings with summer time cooling account for almost 10% of the US total energy budget. To reduce energy consumption various low-energy systems such as displacement

Bolster, Diogo

426

Direct ventilation of the North Pacific did not reach the deep ocean during the last deglaciation  

E-Print Network [OSTI]

of Lund et al. [2011] suggest that the waters at 2710 m were actually very poorly ventilated (i.e., 14 C-depleted reservoirs at this time. [4] Here we present new sedimentary uranium (U) con- centration data from 2393 m

Long, Bernard

427

Experimental evaluation of a naturally ventilated PV double-skin building envelope in real operating conditions  

E-Print Network [OSTI]

-4Mar2014 Author manuscript, published in "Solar Energy 103 (2014) 223-241" DOI : 10.1016/j.solener.2014. Keywords: Building integrated photovoltaic system; Natural ventilation; Chimney effect; Monitoring 1 fallen by 50%. To these ends, significant investments are being made into solar energy, which is seen

Paris-Sud XI, Université de

428

Inventory and Ventilation Efficiency of Nonnative and Native Phragmites australis (Common Reed) in Tidal  

E-Print Network [OSTI]

NOTE Inventory and Ventilation Efficiency of Nonnative and Native Phragmites australis (Common Reed: 3 July 2012 # Coastal and Estuarine Research Federation 2012 Abstract Nonnative Phragmites is among the most in- vasive plants in the U.S. Atlantic coast tidal wetlands, whereas the native Phragmites has

429

Moisture and Ventilation Solutions in Hot, Humid Climates: Florida...  

Energy Savers [EERE]

measures included mastic sealing ducts, installing properly sized high-efficiency HVAC, thoroughly air sealing the building envelope, using water-resistant exterior finishes,...

430

Power systems utilizing the heat of produced formation fluid  

DOE Patents [OSTI]

Systems, methods, and heaters for treating a subsurface formation are described herein. At least one method includes treating a hydrocarbon containing formation. The method may include providing heat to the formation; producing heated fluid from the formation; and generating electricity from at least a portion of the heated fluid using a Kalina cycle.

Lambirth, Gene Richard (Houston, TX)

2011-01-11T23:59:59.000Z

431

Woven heat exchanger  

DOE Patents [OSTI]

This invention relates to a heat exchanger for waste heat recovery from high temperature industrial exhaust streams. In a woven ceramic heat exchanger using the basic tube-in-shell design, each heat exchanger consisting of tube sheets and tube, is woven separately. Individual heat exchangers are assembled in cross-flow configuration. Each heat exchanger is woven from high temperature ceramic fiber, the warp is continuous from tube to tube sheet providing a smooth transition and unitized construction.

Piscitella, R.R.

1984-07-16T23:59:59.000Z

432

AGN Heating through Cavities and Shocks  

E-Print Network [OSTI]

Three comments are made on AGN heating of cooling flows. A simple physical argument is used to show that the enthalpy of a buoyant radio lobe is converted to heat in its wake. Thus, a significant part of ``cavity'' enthalpy is likely to end up as heat. Second, the properties of the repeated weak shocks in M87 are used to argue that they can plausibly prevent gas close to the AGN from cooling. As the most significant heating mechanism at work closest to the AGN, shock heating probably plays a critical role in the feedback mechanism. Third, results are presented from a survey of AGN heating rates in nearby giant elliptical galaxies. With inactive systems included, the overall AGN heating rate is reasonably well matched to the total cooling rate for the sample. Thus, intermittent AGN outbursts are energetically capable of preventing the hot atmospheres of these galaxies from cooling and forming stars.

P. E. J. Nulsen; C. Jones; W. R. Forman; L. P. David; B. R. McNamara; D. A. Rafferty; L. Birzan; M. W. Wise

2006-11-04T23:59:59.000Z

433

Fabric composite heat pipe technology development  

SciTech Connect (OSTI)

Testing has been performed on a variety of fabric composite technology feasibility issues. These include an evaluation of the effective radiation heat transfer rate from a heated metallic surface covered by a ceramic fabric with the intent of determining the effective emissivity'' of the combination of materials, studies of the wicking properties of ceramic fabrics, and the construction of fabric composite heat pipes to test their working properties under both steady state and transient conditions. Results of these experiments shown that fabric composite combinations have greatly enhanced effective emissivities'' resulting from the increases surface area of the fabric, ceramic fabrics can work very well as the wick for heat pipes, ceramic fabric heat pipes have been demonstrated to operate under typical space conditions, and large mass reductions are possible by using fabric composite heat pipes for heat rejection radiator systems.

Klein, A.C.; Gulshan-Ara, Z.; Kiestler, W.; Snuggerud, R.; Marks, T.S. (Department of Nuclear Engineering, Oregon State University, Corvallis, Oregon 97331 (United States))

1993-01-10T23:59:59.000Z

434

Computational fluid dynamic modelling of enhanced heat transfer in tubes with inserts.  

E-Print Network [OSTI]

??Heat transfer is an important process in many different industrial processes including oil refming and energy generation. A shell and tube heat exchanger is one… (more)

Osley, William Gruffydd

2014-01-01T23:59:59.000Z

435

Towards Intelligent District Heating.  

E-Print Network [OSTI]

??A district heating system consists of one or more production units supplying energy in the form of heated water through a distribution pipe network to… (more)

Johansson, Christian

2010-01-01T23:59:59.000Z

436

Total Space Heat-  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Buildings Energy Consumption Survey: Energy End-Use Consumption Tables Total Space Heat- ing Cool- ing Venti- lation Water Heat- ing Light- ing Cook- ing Refrig- eration...

437

ARM - Heat Index Calculations  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

FAQ Just for Fun Meet our Friends Cool Sites Teachers Teachers' Toolbox Lesson Plans Heat Index Calculations Heat Index is an index that combines air temperature and relative...

438

Ceramic heat exchanger  

DOE Patents [OSTI]

A tube containment system is disclosed. The tube containment system does not significantly reduce heat transfer through the tube wall. The contained tube is internally pressurized, and is formed from a ceramic material having high strength, high thermal conductivity, and good thermal shock resistance. The tube containment system includes at least one ceramic fiber braid material disposed about the internally pressurized tube. The material is disposed about the tube in a predetermined axial spacing arrangement. The ceramic fiber braid is present in an amount sufficient to contain the tube if the tube becomes fractured. The tube containment system can also include a plurality of ceramic ring-shaped structures, in contact with the outer surface of the tube, and positioned between the tube and the ceramic fiber braid material, and/or at least one transducer positioned within tube for reducing the internal volume and, therefore, the energy of any shrapnel resulting from a tube fracture. 6 figs.

LaHaye, P.G.; Rahman, F.H.; Lebeau, T.P.; Severin, B.K.

1998-06-16T23:59:59.000Z

439

Ceramic heat exchanger  

DOE Patents [OSTI]

A tube containment system. The tube containment system does not significantly reduce heat transfer through the tube wall. The contained tube is internally pressurized, and is formed from a ceramic material having high strength, high thermal conductivity, and good thermal shock resistance. The tube containment system includes at least one ceramic fiber braid material disposed about the internally pressurized tube. The material is disposed about the tube in a predetermined axial spacing arrangement. The ceramic fiber braid is present in an amount sufficient to contain the tube if the tube becomes fractured. The tube containment system can also include a plurality of ceramic ring-shaped structures, in contact with the outer surface of the tube, and positioned between the tube and the ceramic fiber braid material, and/or at least one transducer positioned within tube for reducing the internal volume and, therefore, the energy of any shrapnel resulting from a tube fracture.

LaHaye, Paul G. (Kennebunk, ME); Rahman, Faress H. (Portland, ME); Lebeau, Thomas P. E. (Portland, ME); Severin, Barbara K. (Biddeford, ME)

1998-01-01T23:59:59.000Z

440

THE HEATS OF COMBUSTION OF AROMATIC HYDROCARBONS AND HEXAMETHYLENE.  

Science Journals Connector (OSTI)

THE HEATS OF COMBUSTION OF AROMATIC HYDROCARBONS AND HEXAMETHYLENE. ... Citation data is made available by participants in CrossRef's Cited-by Linking service. ... Experimental methods included adiabatic heat-capacity calorimetry (5 K to 420 K), comparative ... ...

Theodore W. Richards; Frederick Barry

1915-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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

Hot Water Heating System Operation and Energy Conservation  

E-Print Network [OSTI]

Based on an example of the reconstruction of a hot water heating system, this paper provides an analysis and comparison of the operations of hot water heating systems, including supply water temperature adjustment, flow adjustment during each...

Shao, Z.; Chen, H.; Wei, P.

2006-01-01T23:59:59.000Z

442

System Performance Measurement Supports Design Recommendations for Solar Ventilation Preheat System (Brochure), Federal Energy Management Program (FEMP)  

Broader source: Energy.gov (indexed) [DOE]

System Performance System Performance Measurement Supports Design Recommendations for Solar Ventilation Preheat System The U.S. Department of Energy's (DOE) Federal Energy Management Program (FEMP) sponsored the installation of a data monitoring system to analyze the efficiency and performance of a large solar ventilation preheat (SVP) system. The system was installed at a Federal installation to reduce energy consumption and costs and to help meet Federal energy goals and mandates. SVP systems draw ventilation air in through a perforated metal solar collector with a dark color on the south side of a build-

443

Rotary magnetic heat pump  

DOE Patents [OSTI]

A rotary magnetic heat pump constructed without flow seals or segmented rotor accomplishes recuperation and regeneration by using split flow paths. Heat exchange fluid pumped through heat exchangers and returned to the heat pump splits into two flow components: one flowing counter to the rotor rotation and one flowing with the rotation. 5 figs.

Kirol, L.D.

1987-02-11T23:59:59.000Z

444

Flexible Residential Test Facility: Impact of Infiltration and Ventilation on Measured Heating Season Energy and Moisture Levels  

SciTech Connect (OSTI)

Two identical laboratory homes designed to model existing Florida building stock were sealed and tested to 2.5 ACH50. Then, one was made leaky with 70% leakage through the attic and 30% through windows, to a tested value of 9 ACH50. Reduced energy use was measured in the tighter home (2.5 ACH50) in the range of 15% to 16.5% relative to the leaky (9 ACH50) home. Internal moisture loads resulted in higher dew points inside the tight home than the leaky home. Window condensation and mold growth occurred inside the tight home. Even cutting internal moisture gains in half to 6.05 lbs/day, the dew point of the tight home was more than 15 degrees F higher than the outside dry bulb temperature. The homes have single pane glass representative of older Central Florida homes.

Vieira, R.; Parker, D.; Fairey, P.; Sherwin, J.; Withers, C.; Hoak, D.

2013-09-01T23:59:59.000Z

445

Advanced Variable Speed Air-Source Integrated Heat Pumps Research Project |  

Broader source: Energy.gov (indexed) [DOE]

Advanced Variable Speed Air-Source Advanced Variable Speed Air-Source Integrated Heat Pumps Research Project Advanced Variable Speed Air-Source Integrated Heat Pumps Research Project The U.S. Department of Energy is currently conducting research into advanced variable speed air-source integrated heat pumps (AS-IHPs). Project Description This project seeks to develop AS-IHP products for the larger air-source system market. Development focuses on a fully variable capacity or variable speed AS-IHP option. Project Partners Research is being undertaken through a cooperative research and development agreement (CRADA) between the Department of Energy, Oak Ridge National Laboratory, and a CRADA partner. Project Goals The goal of this project is the development of a fully variable-speed version of an AS-IHP product that can provide heating, ventilation, and air

446

Eco Design and the Optimization of Passive Cooling Ventilation for Energy Saving in the Buildings: A Framework for Prediction of Wind Environment and Natural Ventilation in Different Neighborhood Patterns  

Science Journals Connector (OSTI)

The idea of utilizing natural ventilation for passive cooling and hence reducing the energy for air conditioning systems of buildings has increasingly attracted the attention of researchers. In urban areas how...

Mohammad Reza Masnavi; Hasan-Ali Laghai…

2012-01-01T23:59:59.000Z

447

Electric equipment providing space conditioning, water heating, and refrigeration consumes 12.5% of the nation's  

E-Print Network [OSTI]

Electric equipment providing space conditioning, water heating, and refrigeration consumes 12 are the heart of air conditioners, heat pumps, chillers, supermarket refrigeration systems, and more. Global use of vapor compression system configurations including multi-functional integrated heat pumps, multi

Oak Ridge National Laboratory

448

Recent results on the application of electron cyclotron heating to tokamaks  

Science Journals Connector (OSTI)

Many experiments using Electron Cyclotron Heating (ECH) of plasmas in tokamaks have ... neutral injection, but in addition to bulk heating it has been useful for many purposes, including study of local electron heat

R. Prater

1990-03-01T23:59:59.000Z

449

Thulium-170 heat source  

SciTech Connect (OSTI)

An isotopic heat source is formed using stacks of thin individual layers of a refractory isotopic fuel, preferably thulium oxide, alternating with layers of a low atomic weight diluent, preferably graphite. The graphite serves several functions: to act as a moderator during neutron irradiation, to minimize bremsstrahlung radiation, and to facilitate heat transfer. The fuel stacks are inserted into a heat block, which is encased in a sealed, insulated and shielded structural container. Heat pipes are inserted in the heat block and contain a working fluid. The heat pipe working fluid transfers heat from the heat block to a heat exchanger for power conversion. Single phase gas pressure controls the flow of the working fluid for maximum heat exchange and to provide passive cooling.

Walter, C.E.; Van Konynenburg, R.; VanSant, J.H.

1990-09-06T23:59:59.000Z

450

Thulium-170 heat source  

DOE Patents [OSTI]

An isotopic heat source is formed using stacks of thin individual layers of a refractory isotopic fuel, preferably thulium oxide, alternating with layers of a low atomic weight diluent, preferably graphite. The graphite serves several functions: to act as a moderator during neutron irradiation, to minimize bremsstrahlung radiation, and to facilitate heat transfer. The fuel stacks are inserted into a heat block, which is encased in a sealed, insulated and shielded structural container. Heat pipes are inserted in the heat block and contain a working fluid. The heat pipe working fluid transfers heat from the heat block to a heat exchanger for power conversion. Single phase gas pressure controls the flow of the working fluid for maximum heat exchange and to provide passive cooling.

Walter, Carl E. (Pleasanton, CA); Van Konynenburg, Richard (Livermore, CA); VanSant, James H. (Tracy, CA)

1992-01-01T23:59:59.000Z

451

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 (OSTI)

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

452

Measuring Residential Ventilation System Airflows: Part 1 Laboratory  

E-Print Network [OSTI]

of the longest standing drivers for tighter homes are state weatherization programs that include air tightening was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Building Technology, State and Community Programs, of the U.S. Department of Energy under Contract No. DE-AC02-05CH

453

FAQS Job Task Analyses- Confinement Ventilation and Process Gas Treatment  

Broader source: Energy.gov [DOE]

FAQS Job Task Analyses are performed on the Function Area Qualification Standards. The FAQS Job Task Analyses consists of: Developing a comprehensive list of tasks that define the job such as the duties and responsibilities which include determining their levels of importance and frequency. Identifying and evaluating competencies. Last step is evaluating linkage between job tasks and competencies.

454

Heat Integrate Heat Engines in Process Plants  

E-Print Network [OSTI]

and refrigeration systems. In many instances these real heat engines may appear as a complex process consisting of flash vessels, heat exchangers, compressors, furnaces, etc. See Figure 18a, which shows a simplified diagram of a "steam Rankine cycle." How... and rejection profiles of the real machine. For example, the heat acceptance and re jection profiles for the steam Rankine cycle shown in Figure 18a have been drawn on T,H coordinates in Figure 18b. Thus providing we know the heat acceptance and rejection...

Hindmarsh, E.; Boland, D.; Townsend, D. W.

455

Energy and first costs analysis of displacement and mixing ventilation systems for U.S. buildings and climates  

E-Print Network [OSTI]

In the past two decades, displacement ventilation has been increasingly used in Scandinavia and Western Europe to improve indoor air quality and to save energy. By using a detailed computer simulation method, this study ...

Hu, ShiPing, 1970-

1999-01-01T23:59:59.000Z

456

The Role of North Atlantic Deep Water Formation in an OGCM’s Ventilation and Thermohaline Circulation  

Science Journals Connector (OSTI)

Two coarse-resolution model experiments are carried out on an OGCM to examine the effects of North Atlantic Deep Water (NADW) formation on the thermohaline circulation (THC) and ventilation timescales of the abyssal ocean. An idealized age tracer ...

Paul J. Goodman

1998-09-01T23:59:59.000Z

457

H.N. Knudsen, P. Wargocki and J. Vondruskova (2006) "Effect of ventilation on perceived quality of air polluted  

E-Print Network [OSTI]

quality of air polluted by building materials ­ a summary of reported data", Proceedings of Healthy Buildings 2006, Vol. 1, 57-62. #12;#12;Effect of ventilation on perceived quality of air polluted

458

Wind- Chimney (Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation).  

E-Print Network [OSTI]

?? WIND-CHIMNEY Integrating the principles of a wind-catcher and a solar chimney to provide natural ventilation Fereshteh Tavakolinia Abstract This paper suggests using a wind-catcher… (more)

Tavakolinia, Fereshteh

2011-01-01T23:59:59.000Z

459

Transition dynamics between the multiple steady states in natural ventilation systems : from theories to applications in optimal controls  

E-Print Network [OSTI]

In this study, we investigated the multiple steady state behavior, an important observation in numerical and experimental studies in natural ventilation systems. The-oretical models are developed and their applications in ...

Yuan, Jinchao

2007-01-01T23:59:59.000Z

460

Heat-driven acoustic cooling engine having no moving parts  

DOE Patents [OSTI]

A heat-driven acoustic cooling engine having no moving parts receives heat from a heat source. The acoustic cooling engine comprises an elongated resonant pressure vessel having first and second ends. A compressible fluid having a substantial thermal expansion coefficient and capable of supporting an acoustic standing wave is contained in the resonant pressure vessel. The heat source supplies heat to the first end of the vessel. A first heat exchanger in the vessel is spaced-apart from the first end and receives heat from the first end. A first thermodynamic element is adjacent to the first heat exchanger and converts some of the heat transmitted by the first heat exchanger into acoustic power. A second thermodynamic element has a first end located spaced-apart from the first thermodynamic element and a second end farther away from the first thermodynamic element than is its first end. The first end of the second thermodynamic element heats while its second end cools as a consequence of the acoustic power. A second heat exchanger is adjacent to and between the first and second thermodynamic elements. A heat sink outside of the vessel is thermally coupled to and receives heat from the second heat exchanger. The resonant pressure vessel can include a housing less than one-fourth wavelength in length coupled to a reservoir. The housing can include a reduced diameter portion communicating with the reservoir.

Wheatley, John C. (Los Alamos, NM); Swift, Gregory W. (Santa Fe, NM); Migliori, Albert (Santa Fe, NM); Hofler, Thomas J. (Los Alamos, NM)

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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.


461

Hospital ventilation standards and energy conservation: chemical contamination of hospital air. Final report  

SciTech Connect (OSTI)

In an era of increasing energy conservation consciousness, a critical reassessment of the validity of hospital ventilation and thermal standards is made. If current standards are found to be excessively conservative, major energy conservation measures could be undertaken by rebalancing and/or modification of current HVAC systems. To establish whether or not reducing ventilation rates would increase airborne chemical contamination to unacceptable levels, a field survey was conducted to develop an inventory and dosage estimates of hospital generated airborne chemical contaminants to which patients, staff, and visitors are exposed. The results of the study are presented. Emphasis is on patient exposure, but an examination of occupational exposure was also made. An in-depth assessment of the laboratory air environment is documented. Housekeeping products used in survey hospitals, hazardous properties of housekeeping chemicals and probable product composition are discussed in the appendices.

Rainer, D.; Michaelsen, G.S.

1980-03-01T23:59:59.000Z

462

Evaluation of cracking in the 241-AZ tank farm ventilation line at the Hanford Site  

SciTech Connect (OSTI)

In the period from April to October of 1988, a series of welding operations on the outside of the AZ Tank Farm ventilation line piping at the Hanford Site produced unexpected and repeated cracking of the austenitic stainless steel base metal and of a seam weld in the pipe. The ventilation line is fabricated from type 304L stainless steel pipe of 24 inch diameter and 0.25 inch wall thickness. The pipe was wrapped in polyethylene bubble wrap and buried approximately 12 feet below grade. Except for the time period between 1980 and 1987, impressed current cathodic protection has been applied to the pipe since its installation in 1974. The paper describes the history of the cracking of the pipe, the probable cracking mechanisms, and the recommended future action for repair/replacement of the pipe.

ANANTATMULA, R.P.

1999-10-20T23:59:59.000Z

463

Thermodynamic Advantages of Low Temperature Combustion Engines Including the Use of Low Heat Rejection Concepts  

Broader source: Energy.gov [DOE]

Thermodynamic cycle simulation was used to evaluate low temperature combustion in systematic and sequential fashion to base engine design.

464

ARM - Measurement - Sensible heat flux  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govMeasurementsSensible heat flux govMeasurementsSensible heat flux ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Sensible heat flux The time rate of flow for the energy transferred from a warm or hot surface to whatever is touching it, typically air. Categories Surface Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CO2FLX : Carbon Dioxide Flux Measurement Systems ECOR : Eddy Correlation Flux Measurement System EBBR : Energy Balance Bowen Ratio Station

465

ARM - Measurement - Latent heat flux  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govMeasurementsLatent heat flux govMeasurementsLatent heat flux ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Latent heat flux The time rate of flow for the specific enthalpy difference between two phases of a substance at the same temperature, typically water. Categories Surface Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CO2FLX : Carbon Dioxide Flux Measurement Systems ECOR : Eddy Correlation Flux Measurement System EBBR : Energy Balance Bowen Ratio Station

466

Literature review supporting assessment of potential radionuclides in the 291-Z exhaust ventilation  

SciTech Connect (OSTI)

This literature review was prepared to support a study conducted by Pacific Northwest Laboratory to assess the potential deposition and resuspension of radionuclides in the 291-Z ventilation exhaust building located in the 200 West Area of the US Department of Energy`s Hanford Project near Richland, Washington. The filtered ventilation air from three of the facilities at the Plutonium Finishing Plant (PFP) complex are combined together in the 291-Z building before discharge through a common stack. These three facilities contributing filtered exhaust air to the discharge stream are (1) the PFP, also known as the Z-Plant or 234-5Z, (2) the Plutonium Reclamation Facility (PRF or 236-Z), and (3), the Waste Incinerator Building (WIB or 232-Z). The 291-Z building houses the exhaust fans that pull air from the 291-Z central collection plenum and exhausts the air to the stack. Section 2.0 of this report is a description of the physical characteristic of the ventilation system from the High Efficiency Particulate Air (HEPA) filters to the exhaust stack. A description of the processes performed in the facilities that are vented through 291-Z is given in Section 3.0. The description focuses on the chemical and physical forms of potential aerosols given off from the unit operations. A timeline of the operations and events that may have affected the deposition of material in the ventilation system is shown. Aerosol and radiation measurements taken in previous studies are also discussed. Section 4.0 discusses the factors that influence particle deposition and adhesion. Mechanisms of attachment and resuspension are covered with specific attention to the PFP ducts. Conclusions and recommendations are given in Section 5.0.

Mahoney, L.A.; Ballinger, M.Y.; Jette, S.J.; Thomas, L.M. Glissmeyer, J.A. [Pacific Northwest Lab., Richland, WA (United States); Davis, W.E. [Westinghouse Hanford Co., Richland, WA (United States)

1994-08-01T23:59:59.000Z

467

Airflow Simulation and Energy Analysis in Ventilated Room with a New Type of Air Conditioning  

E-Print Network [OSTI]

quality will be achieved. Our study aims to simulate airflow in the ventilated room with this new type of air conditioning. Radiation is taken into account by the energy conservation in the system. The following section presents algorithm, thermal..., the governing equations to be solved are the conservation equations for continuity, momentum, and energy as well as the equations for turbulent kinetic energy and its dissipation rate. The buoyancy effect is accounted for by Boussinesq approximation...

Liu, D.; Tang, G.; Zhao, F.

2006-01-01T23:59:59.000Z

468

Building-Integrated Heat & Moisture Exchange  

Energy Savers [EERE]

ventilation energy benefit as well as the insulation benefit of this hybrid envelopehvac technology. 2 Purpose and Objectives Problem Statement: State-of-the-industry energy...

469

Aerodynamic efficiency of smoke ventilators in light streets and shed-type roofs  

Science Journals Connector (OSTI)

Low-rise industrial buildings in continental Europe have usually no or very little window area in the sidewalls. To provide the necessary daylight, translucent surfaces are fitted in the roof. Well known examples are shed roofs or curved and shed-type light streets in flat roofs. For economic reasons smoke ventilators are then integrated into the light surfaces. This paper gives typical examples of smoke ventilators installed in shed roofs and in curved or shed-type light streets. The measurement of the aerodynamic free areas on full scale apparatus is not possible due to the large dimensions of the relevant roof surfaces. Therefore, tests have to be conducted in model scale. The relevant similarity considerations for such model tests are discussed and the applicability of model scale tests is demonstrated. Finally, the most important parameters influencing the aerodynamic efficiency of typical ventilator installations in shed-roofs and curved or shed-type light streets are described for the cases without and with side wind.

H.J. Gerhardt; C. Kramer

1993-01-01T23:59:59.000Z

470

HEATING 7. 1 user's manual  

SciTech Connect (OSTI)

HEATING is a FORTRAN program designed to solve steady-state and/or transient heat conduction problems in one-, two-, or three- dimensional Cartesian, cylindrical, or spherical coordinates. A model may include multiple materials, and the thermal conductivity, density, and specific heat of each material may be both time- and temperature-dependent. The thermal conductivity may be anisotropic. Materials may undergo change of phase. Thermal properties of materials may be input or may be extracted from a material properties library. Heating generation rates may be dependent on time, temperature, and position, and boundary temperatures may be time- and position-dependent. The boundary conditions, which may be surface-to-boundary or surface-to-surface, may be specified temperatures or any combination of prescribed heat flux, forced convection, natural convection, and radiation. The boundary condition parameters may be time- and/or temperature-dependent. General graybody radiation problems may be modeled with user-defined factors for radiant exchange. The mesh spacing may be variable along each axis. HEATING is variably dimensioned and utilizes free-form input. Three steady-state solution techniques are available: point-successive-overrelaxation iterative method with extrapolation, direct-solution (for one-dimensional or two-dimensional problems), and conjugate gradient. Transient problems may be solved using one of several finite-difference schemes: Crank-Nicolson implicit, Classical Implicit Procedure (CIP), Classical Explicit Procedure (CEP), or Levy explicit method (which for some circumstances allows a time step greater than the CEP stability criterion). The solution of the system of equations arising from the implicit techniques is accomplished by point-successive-overrelaxation iteration and includes procedures to estimate the optimum acceleration parameter.

Childs, K.W.

1991-07-01T23:59:59.000Z

471

Heating oils, 1982  

SciTech Connect (OSTI)

Properties of 235 heating oils marketed in the United States were submitted for study and compilation under agreement between BETC and API. The fuels were manufactured by 25 petroleum refining companies in 88 domestic refineries. The data are tabulated according to six grades of fuel and subdivided into five geographic regions in which the fuels are marketed. The five regions containing a total of 16 marketing districts are shown on a map in the report. Trend charts are included showing average properties of the six grades of fuel for the past several years. Summaries of the results of the tests by grade and by region for 1982 compared with data for 1981 are tabulated. Analyses of grade 6 foreign import oils are presented.

Shelton, E.M.

1982-08-01T23:59:59.000Z

472

Heating oils, 1980  

SciTech Connect (OSTI)

Properties of 247 heating oils marketed in the United States were submitted for study and compilation under agreement between the Bartlesville Energy Technology Center and the American Petroleum Institute. The fuels were manufactured by 26 petroleum refining companies in 87 domestic refineries. The data are tabulated according to six grades of fuel and subdivided into five geographic regions in which the fuels are marketed. The six grades of fuel are defined by the American Society for Testing and Materials Specification D396. The five regions containing a total of 16 marketing districts are shown on a map in the report. Trend charts are included showing average properties of the six grades of fuel for the past several years. Summaries of the results of the tests by grade and by region for 1980 compared with data for 1979 are shown in tables. Analyses of grades 2, 5(light), and 6 foreign import oils are presented.

Shelton, E.M.

1980-10-01T23:59:59.000Z

473

Heating oils, 1983  

SciTech Connect (OSTI)

Properties of 195 heating oils marketed in the United States were submitted for study and compilation under agreement between the Bartlesville Energy Technology Center (BETC) and the American Petroleum Institute (API). The fuels were manufactured by 25 petroleum refining companies in 83 domestic refineries. The data are tabulated according to six grades of fuel and subdivided into five geographic regions in which the fuels are marketed. The six grades of fuels are defined by the American Society for Testing and Materials (ASTM) Specification D396. The five regions containing a total of 16 marketing districts are shown on a map in the report. Trend charts are included showing average properties of the six grades of fuel for the past several years. Summaries of the results of the tests by grade and by region for 1983 are compared with data for 1982. 7 figures, 12 tables.

Shelton, E.M.

1983-08-01T23:59:59.000Z

474

Heating oils, 1981  

SciTech Connect (OSTI)

Properties of 249 heating oils marketed in the United States were submitted for study and compilation under agreement between the Bartlesville Energy Technology Center (BETC) and the American Petroleum Institute (API). The fuels were manufactured by 28 petroleum refining companies in 92 domestic refineries. The data are tabulated according to six grades of fuel and subdivided into five geographic regions in which the fuels are marketed. The six grades of fuels are defined by the American Society for Testing and Materials (ASTM) Specification D396. The five regions containing a total of 16 marketing districts are shown on a map in the report. Trend charts are included showing average properties of the six grades of fuel for the past several years. Summaries of the results of the tests by grade and by region for 1981 compared with data for 1980 are shown in Tables 1 through 6. Analyses of grade 6 foreign import oils are presented in Table 13.

Shelton, E.M.

1981-08-01T23:59:59.000Z

475

Heat transfer system  

DOE Patents [OSTI]

A heat transfer system for a nuclear reactor. Heat transfer is accomplished within a sealed vapor chamber which is substantially evacuated prior to use. A heat transfer medium, which is liquid at the design operating temperatures, transfers heat from tubes interposed in the reactor primary loop to spaced tubes connected to a steam line for power generation purposes. Heat transfer is accomplished by a two-phase liquid-vapor-liquid process as used in heat pipes. Condensible gases are removed from the vapor chamber through a vertical extension in open communication with the chamber interior.

McGuire, Joseph C. (Richland, WA)

1982-01-01T23:59:59.000Z

476

Wound tube heat exchanger  

DOE Patents [OSTI]

What is disclosed is a wound tube heat exchanger in which a plurality of tubes having flattened areas are held contiguous adjacent flattened areas of tubes by a plurality of windings to give a double walled heat exchanger. The plurality of windings serve as a plurality of effective force vectors holding the conduits contiguous heat conducting walls of another conduit and result in highly efficient heat transfer. The resulting heat exchange bundle is economical and can be coiled into the desired shape. Also disclosed are specific embodiments such as the one in which the tubes are expanded against their windings after being coiled to insure highly efficient heat transfer.

Ecker, Amir L. (Duncanville, TX)

1983-01-01T23:59:59.000Z

477

Heat Exchangers for Solar Water Heating Systems | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Heat Exchangers for Solar Water Heating Systems Heat Exchangers for Solar Water Heating Systems Heat Exchangers for Solar Water Heating Systems May 30, 2012 - 3:40pm Addthis Image of a heat exchanger. | Photo from iStockphoto.com Image of a heat exchanger. | Photo from iStockphoto.com Solar water heating systems use heat exchangers to transfer solar energy absorbed in solar collectors to the liquid or air used to heat water or a space. Heat exchangers can be made of steel, copper, bronze, stainless steel, aluminum, or cast iron. Solar heating systems usually use copper, because it is a good thermal conductor and has greater resistance to corrosion. Types of Heat Exchangers Solar water heating systems use three types of heat exchangers: Liquid-to-liquid A liquid-to-liquid heat exchanger uses a heat-transfer fluid that

478

Helical Tomotherapy Planning for Lung Cancer Based on Ventilation Magnetic Resonance Imaging  

SciTech Connect (OSTI)

To investigate the feasibility of lung ventilation-based treatment planning, computed tomography and hyperpolarized (HP) helium-3 (He-3) magnetic resonance imaging (MRI) ventilation images of 6 subjects were coregistered for intensity-modulated radiation therapy planning in Tomotherapy. Highly-functional lungs (HFL) and less-functional lungs (LFL) were contoured based on their ventilation image intensities, and a cylindrical planning-target-volume was simulated at locations adjacent to both HFL and LFL. Annals of an anatomy-based plan (Plan 1) and a ventilation-based plan (Plan 2) were generated. The following dosimetric parameters were determined and compared between the 2 plans: percentage of total/HFL volume receiving {>=}20 Gy, 15 Gy, 10 Gy, and 5 Gy (TLV{sub 20}, HFLV{sub 20}, TLV{sub 15}, HFLV{sub 15}, TLV{sub 10}, HFLV{sub 10}, TLV{sub 5}, HFLV{sub 5}), mean total/HFL dose (MTLD/HFLD), maximum doses to all organs at risk (OARs), and target dose conformality. Compared with Plan 1, Plan 2 reduced mean HFLD (mean reduction, 0.8 Gy), MTLD (mean reduction, 0.6 Gy), HFLV{sub 20} (mean reduction, 1.9%), TLV{sub 20} (mean reduction, 1.5%), TLV{sub 15} (mean reduction, 1.7%), and TLV{sub 10} (mean reduction, 2.1%). P-values of the above comparisons are less than 0.05 using the Wilcoxon signed rank test. For HFLV{sub 15}, HFLV{sub 10}, TLV{sub 5}, and HTLV{sub 5}, Plan 2 resulted in lower values than plan 1 but the differences are not significant (P-value range, 0.063-0.219). Plan 2 did not significantly change maximum doses to OARs (P-value range, 0.063-0.563) and target conformality (P = 1.000). HP He-3 MRI of patients with lung disease shows a highly heterogeneous ventilation capacity that can be utilized for functional treatment planning. Moderate but statistically significant improvements in sparing functional lungs were achieved using helical tomotherapy plans.

Cai Jing; McLawhorn, Robert [Department of Radiation Oncology, University of Virginia, Charlottesville, VA (United States); Altes, Tallisa A.; Lange, Eduard de [Department of Radiology, University of Virginia, Charlottesville, VA (United States); Read, Paul W.; Larner, James M.; Benedict, Stanley H. [Department of Radiation Oncology, University of Virginia, Charlottesville, VA (United States); Sheng Ke, E-mail: ks2mc@virginia.edu [Department of Radiation Oncology, University of Virginia, Charlottesville, VA (United States)

2011-01-01T23:59:59.000Z

479

Geothermal Heat Pumps  

Broader source: Energy.gov [DOE]

The Geothermal Technologies Office focuses only on electricity generation. For additional information about geothermal heating and cooling and ground source heat pumps, please visit the U.S. Department of Energy (DOE)'s Buildings Technologies Office.

480

HEAT TRANSFER FLUIDS  

E-Print Network [OSTI]

The choice of heat transfer fluids has significant effects on the performance, cost, and reliability of solar thermal systems. In this chapter, we evaluate existing heat transfer fluids such as oils and molten salts based ...

Lenert, Andrej

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "include heating ventilation" 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.


481

Residential heating oil price  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

heating oil price decreases The average retail price for home heating oil fell 6.3 cents from a week ago to 2.91 per gallon. That's down 1.10 from a year ago, based on the...

482

Residential heating oil price  

U.S. Energy Information Administration (EIA) Indexed Site

heating oil price decreases The average retail price for home heating oil fell 7.5 cents from a week ago to 2.84 per gallon. That's down 1.22 from a year ago, based on the...

483

Residential heating oil price  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

heating oil price decreases The average retail price for home heating oil fell 7.6 cents from a week ago to 2.97 per gallon. That's down 1.05 from a year ago, based on the...

484

Residential heating oil price  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

heating oil price decreases The average retail price for home heating oil fell 3.6 cents from a week ago to 3.04 per gallon. That's down 99.4 cents from a year ago, based on the...

485

Combined Heat and Power System Achieves Millions in Cost Savings...  

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

campus, which includes 750 buildings. Photo courtesy of Texas A&M University Combined Heat and Power System Achieves Millions in Cost Savings at Large University Recovery Act...

486

Methods for microwave heat treatment of manufactured components  

DOE Patents [OSTI]

An apparatus for heat treating manufactured components using microwave energy and microwave susceptor material. Heat treating medium such as eutectic salts may be employed. A fluidized bed introduces process gases which may include carburizing or nitriding gases. The process may be operated in a batch mode or continuous process mode. A microwave heating probe may be used to restart a frozen eutectic salt bath.

Ripley, Edward B. (Knoxville, TN)

2010-08-03T23:59:59.000Z

487

MA HEAT Loan Overview  

Broader source: Energy.gov [DOE]

Presents information on the success of Massachusetts's HEAT loan offerings and how the financing tool is funded.

488

Ductless Heat Pumps  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Water Heaters Showerheads Residential Weatherization Performance Tested Comfort Systems Ductless Heat Pumps New Construction Residential Marketing Toolkit Retail Sales...

489

Heat Pump Water Heaters  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Water Heaters Showerheads Residential Weatherization Performance Tested Comfort Systems Ductless Heat Pumps New Construction Residential Marketing Toolkit Retail Sales...

490

Solar heat receiver  

DOE Patents [OSTI]

A receiver is described for converting solar energy to heat a gas to temperatures from 700 to 900/sup 0/C. The receiver is formed to minimize impingement of radiation on the walls and to provide maximum heating at and near the entry of the gas exit. Also, the receiver is formed to provide controlled movement of the gas to be heated to minimize wall temperatures. The receiver is designed for use with gas containing fine heat absorbing particles, such as carbon particles.

Hunt, A.J.; Hansen, L.J.; Evans, D.B.

1982-09-29T23:59:59.000Z

491

Electric resistive space heating  

Science Journals Connector (OSTI)

The cost of heating residential buildings using electricity is compared to the cost employing gas or oil. (AIP)

David Bodansky

1985-01-01T23:59:59.000Z

492

Liquid heat capacity lasers  

DOE Patents [OSTI]

The heat capacity laser concept is extended to systems in which the heat capacity lasing media is a liquid. The laser active liquid is circulated from a reservoir (where the bulk of the media and hence waste heat resides) through a channel so configured for both optical pumping of the media for gain and for light amplification from the resulting gain.

Comaskey, Brian J. (Walnut Creek, CA); Scheibner, Karl F. (Tracy, CA); Ault, Earl R. (Livermore, CA)

2007-05-01T23:59:59.000Z

493

Heat Transfer Guest Editorial  

E-Print Network [OSTI]

Journal of Heat Transfer Guest Editorial We are indeed delighted in bringing out this special issue was showcased in diverse areas such as traditional heat and mass transfer, lab-on-chip, sensors, biomedical applica- tions, micromixers, fuel cells, and microdevices. Selected papers in the field of heat transfer

Kandlikar, Satish

494

Acoustic Heating Peter Ulmschneider  

E-Print Network [OSTI]

Acoustic Heating Peter Ulmschneider lnstitut fiir Theoretische Astrophysik der Universitat waves are a viable and prevalent heating mechanism both in early- and in late-type stars. Acoustic heating appears to be a dominant mechanism for situations where magnetic fields are weak or absent

Ulmschneider, Peter

495

Ammoniated salt heat pump  

SciTech Connect (OSTI)

A thermochemical heat pump/energy storage system using liquid ammoniate salts is described. The system, which can be used for space heating or cooling, provides energy storage for both functions. The bulk of the energy is stored as chemical energy and thus can be stored indefinitely. The system is well suited to use with a solar energy source or industrial waste heat.

Haas, W.R.; Jaeger, F.J.; Giordano, T.J.

1981-01-01T23:59:59.000Z

496

Pioneering Heat Pump Project  

Broader source: Energy.gov [DOE]

Project objectives: To install and monitor an innovative WaterFurnace geothermal system that is technologically advanced and evolving; To generate hot water heating from a heat pump that uses non-ozone depleting refrigerant CO2. To demonstrate the energy efficiency of this system ground source heat pump system.

497

Net Taxable Gasoline Gallons (Including Aviation Gasoline)  

E-Print Network [OSTI]

Net Taxable Gasoline Gallons (Including Aviation Gasoline) Period 2000 2001 (2) 2002 2003 2004 "gross" to "net" , was deemed impractical. (5) This report replaces the Gross Taxable Gasoline Gallons (Including Aviation Gasoline) report which will not be produced after December 2002. (6) The November 2007

498

Combined heat recovery and make-up water heating system  

SciTech Connect (OSTI)

A cogeneration plant is described comprising in combination: a first stage source of hot gas; a duct having an inlet for receiving the hot gas and an outlet stack open to the atmosphere; a second stage recovery heat steam generator including an evaporator situated in the duct, and economizer in the duct downstream of the evaporator, and steam drum fluidly connected to the evaporator and the economizer; feedwater supply means including a deaerator heater and feedwater pump for supplying deaerated feedwater to the steam drum through the economizer; makeup water supply means including a makeup pump for delivering makeup water to the deaerator heater; means fluidly connected to the steam drum for supplying auxiliary steam to the deaerator heater; and heat exchanger means located between the deaerator and the economizer, for transferring heat from the feedwater to the makeup water, thereby increasing the temperature of the makeup water delivered to the deaerator and decreasing the temperature of the feedwater delivered to the economizer, without fluid exchange.

Kim, S.Y.

1988-05-24T23:59:59.000Z

499

Check Burner Air to Fuel Ratios (International Fact Sheet), Energy Tips-Process Heating, Process Heating Tip Sheet #2c  

SciTech Connect (OSTI)

This English/Chinese international tip sheet provides information for optimizing efficiency of industrial process heating systems and includes measurements in metric units.

Not Available

2010-10-01T23:59:59.000Z

500

Tips: Passive Solar Heating and Cooling | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Tips: Passive Solar Heating and Cooling Tips: Passive Solar Heating and Cooling Tips: Passive Solar Heating and Cooling April 24, 2012 - 4:18pm Addthis Tips: Passive Solar Heating and Cooling Using passive solar design to heat and cool your home can be both environmentally friendly and cost effective. In many cases, your heating costs can be reduced to less than half the cost of heating a typical home. Passive solar design can also help lower your cooling costs. Passive solar cooling techniques include carefully designed overhangs and using reflective coatings on windows, exterior walls, and roofs. Newer techniques include placing large, insulated windows on south-facing walls and putting thermal mass, such as a concrete slab floor or a heat-absorbing wall, close to the windows. A passive solar house requires careful design and siting, which vary by