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We encourage you to perform a real-time search of NLEBeta
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1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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.

11

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.

12

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

13

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

14

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

15

MODELING PARTICLE DEPOSITION ON HVAC HEAT EXCHANGERS  

E-Print Network [OSTI]

LBNL-49339 MODELING PARTICLE DEPOSITION ON HVAC HEAT EXCHANGERS J.A. Siegel1,3 * and W.W. Nazaroff2 Department of Energy under contract DE-AC03-76SF00098. #12;MODELING PARTICLE DEPOSITION ON HVAC HEAT, such as discontinuities in the fins, are hypothesized to be responsible for the discrepancy. INDEX TERMS HVAC, Fouling

16

HVAC, Water Heating, and Appliances | Department of Energy  

Energy Savers [EERE]

HVAC, Water Heating, and Appliances HVAC, Water Heating, and Appliances How a Small Business is Transforming the Cold Climate Heating Market How a Small Business is Transforming...

17

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

18

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

19

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 HVAC Systems The purpose of a 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

20

NETL Sorbents Licensed to Help Lower Power Draw of HVAC  

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

the energy efficiency of commercial HVAC (heating, ventilation, and air conditioning) systems. HVAC is one of the largest draws of electric power in the United States. In many...

Note: This page contains sample records for the topic "hvac heating ventilating" 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

System-Level Monitoring and Diagnosis of Building HVAC System.  

E-Print Network [OSTI]

??Heating, ventilation, and air conditioning (HVAC) is an indoor environmental technology that is extensively instrumented for large-scale buildings. Among all subsystems of buildings, the HVAC… (more)

Wu, Siyu

2013-01-01T23:59:59.000Z

22

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

23

Building Technologies Office: HVAC Optimized Heat Exchangers Research  

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

Optimized Heat Optimized Heat Exchangers Research Project to someone by E-mail Share Building Technologies Office: HVAC Optimized Heat Exchangers Research Project on Facebook Tweet about Building Technologies Office: HVAC Optimized Heat Exchangers Research Project on Twitter Bookmark Building Technologies Office: HVAC Optimized Heat Exchangers Research Project on Google Bookmark Building Technologies Office: HVAC Optimized Heat Exchangers Research Project on Delicious Rank Building Technologies Office: HVAC Optimized Heat Exchangers Research Project on Digg Find More places to share Building Technologies Office: HVAC Optimized Heat Exchangers Research Project on AddThis.com... About Take Action to Save Energy Partner with DOE Activities Appliances Research Building Envelope Research

24

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.

25

Deposition of Biological Aerosols on HVAC Heat Exchangers  

E-Print Network [OSTI]

LBNL-47669 Deposition of Biological Aerosols on HVAC Heat Exchangers Jeffrey Siegel and Iain Walker of Biological Aerosols on HVAC Heat Exchangers Jeffrey A. Siegel Iain S. Walker, Ph.D. ASHRAE Student Member that are found in commercial and residential HVAC systems of 1 - 6 m/s (200 - 1200 ft/min), particle diameters

26

Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger  

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

Radial Air Bearing Radial Air Bearing Heat Exchanger Research Project to someone by E-mail Share Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Facebook Tweet about Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Twitter Bookmark Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Google Bookmark Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Delicious Rank Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Digg Find More places to share Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on AddThis.com... About Take Action to Save Energy Partner with DOE

27

Implementation and main results Ecient Management of HVAC Systems  

E-Print Network [OSTI]

water to remove heat from the air in the building. In HVAC system equipped with chillers, the electrical #12;Motivation Implementation and main results HVAC Systems Multiple-chiller systems Heating, Ventilation and Air-Conditioning System Heating, Ventilation and Air Conditioning Systems (HVAC) represents

Schenato, Luca

28

Modeling and Identification for HVAC Systems.  

E-Print Network [OSTI]

?? Heating, Ventilation and Air Conditioning (HVAC) systems consist of all the equipment that control the conditions and distribution of indoor air. Indoor air must… (more)

Scotton, Francesco

2012-01-01T23:59:59.000Z

29

Heat recovery and the economizer for HVAC systems  

SciTech Connect (OSTI)

This articles examines why a combined heat reclaim/economizer system with priority to heat reclaim operation is most likely to result in the least annual total HVAC energy. PC-based, hour-by-hour simulation programs evaluate annual HVAC energy requirements when using combined operation of heat reclaim and economizer cycle, while giving priority to operation of either one. These simulation programs also enable the design engineer to select the most viable heat reclaim and/or economizer system for any given type of HVAC system serving the building internal load level, building geographical location and other building/system variables.

Anantapantula, V.S. (Emerson Electric Co., St. Louis, MO (United States). Alco Controls Div.); Sauer, H.J. Jr. (Univ. of Missouri, Rolla, MO (United States))

1994-11-01T23:59:59.000Z

30

OBSERVE: Occupancy-Based System for Efficient Reduction of HVAC Energy  

E-Print Network [OSTI]

OBSERVE: Occupancy-Based System for Efficient Reduction of HVAC Energy Varick L. Erickson, Miguel Á & control General Terms Algorithms, Machine Learning, Measurement Keywords Occupancy, HVAC, Ventilation for heating, ventilation, and air-conditioning (HVAC) systems[2]. Studies suggest that 15% to 25% of HVAC

Carreira-Perpiñán, Miguel Á.

31

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

32

Cooling and Dehumidification HVAC Technology for 1990s  

E-Print Network [OSTI]

Desiccant Cooling and Dehumidification HVAC Technology for 1990s HVAC: Heating, Ventilation Research Trusts SERI #12;Challenges Facing HVAC Industry in 1990's * Reduction of CFCs * Indoor air quality to solve the problems of the HVAC industry faced in1990's for space conditioning. SERI #12;l- = m mN a- mg

Oak Ridge National Laboratory

33

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

34

Definition: HVAC | Open Energy Information  

Open Energy Info (EERE)

HVAC HVAC Jump to: navigation, search Dictionary.png HVAC An abbreviation for the heating, ventilation, and air-conditioning system; the system or systems that condition air in a building.[1] View on Wikipedia Wikipedia Definition HVAC is the technology of indoor and vehicular environmental comfort. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, or ventilating is dropped as in HACR (such as the designation of HACR-rated circuit breakers). HVAC is important in the design of medium to large industrial and office buildings such as skyscrapers and in marine environments such as aquariums, where safe and

35

The impact of filter loading on residential hvac performance.  

E-Print Network [OSTI]

??Buildings are the primary user of energy in the USA. Within homes, the heating, ventilation, and air condition (HVAC) system is the largest energy consumer.… (more)

Kruger, Abraham J.

2013-01-01T23:59:59.000Z

36

Co-simulation for performance prediction of integrated building and HVAC systems -An analysis of solution  

E-Print Network [OSTI]

Co-simulation for performance prediction of integrated building and HVAC systems - An analysis performance simulation of buildings and heating, ventilation and air- conditioning (HVAC) systems can help, heating, ventilation and air-conditioning (HVAC) systems are responsible for 10%-60% of the total building

37

Energy saving by integrated control of natural ventilation and HVAC systems using model guide for comparison  

Science Journals Connector (OSTI)

Abstract Integrated control by controlling both natural ventilation and HVAC systems based on human thermal comfort requirement can result in significant energy savings. The concept of this paper differs from conventional methods of energy saving in HVAC systems by integrating the control of both these HVAC systems and the available natural ventilation that is based on the temperature difference between the indoor and the outdoor air. This difference affects the rate of change of indoor air enthalpy or indoor air potential energy storage. However, this is not efficient enough as there are other factors affecting the rate of change of indoor air enthalpy that should be considered to achieve maximum energy saving. One way of improvement can be through the use of model guide for comparison (MGFC) that uses physical-empirical hybrid modelling to predict the rate of change of indoor air potential energy storage considering building fabric and its fixture. Three methods (normal, conventional and proposed) are tested on an identical residential building model using predicted mean vote (PMV) sensor as a criterion test for thermal comfort standard. The results indicate that the proposed method achieved significant energy savings compared with the other methods while still achieving thermal comfort.

Raad Z. Homod; Khairul Salleh Mohamed Sahari; Haider A.F. Almurib

2014-01-01T23:59:59.000Z

38

Direct Digital Control- A Tool for Energy Management of HVAC Systems  

E-Print Network [OSTI]

Direct digital control (DDC) applied to heating, ventilating, and air-conditioning (HVAC) systems corrects many of the deficiencies of conventional automatic temperature control systems. By applying new control sequences, DDC optimizes HVAC energy...

Swanson, K.

39

Energy Consumption Analyses of Frequently-used HVAC System Types in High Performance Office Buildings.  

E-Print Network [OSTI]

??The high energy consumption of heating, ventilation and air-conditioning (HVAC) systems in commercial buildings is a hot topic. Office buildings, a typical building set of… (more)

Yan, Liusheng

2014-01-01T23:59:59.000Z

40

Department of Mechanical Engineering Spring 2012 HVAC Filter Sensor -Global  

E-Print Network [OSTI]

PENNSTATE Department of Mechanical Engineering Spring 2012 HVAC Filter Sensor - Global Overview The purpose of this project is to develop a heating, ventilation, and air conditioning (HVAC) monitoring a residential, forced flow, multi-zone HVAC filter needs to be replaced, and then alerts the users

Demirel, Melik C.

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Monitoring-based HVAC Commissioning of an Existing Office  

E-Print Network [OSTI]

LBNL-5940E Monitoring-based HVAC Commissioning of an Existing Office Building for Energy Efficiency thereof or The Regents of the University of California. #12;1 Monitoring-based HVAC Commissioning@lbl.gov, Tel: 1-510-486-4921 Abstract The performance of Heating, Ventilation and Air Conditioning (HVAC

42

Handover Performance of HVAC Duct Based Indoor Wireless Networks  

E-Print Network [OSTI]

Handover Performance of HVAC Duct Based Indoor Wireless Networks A. E. Xhafa, P. Sonthikorn, and O in indoor wireless net- works (IWN) that use heating, ventilation, and air conditioning (HVAC) ducts.e., new call blocking and handover dropping probabilities, of an IWN that uses HVAC ducts are up to 6

Stancil, Daniel D.

43

Recovery Act-Funded HVAC projects  

Broader source: Energy.gov [DOE]

The U.S. Department of Energy was allocated funding from the American Recovery and Reinvestment Act to conduct research into heating, ventilation, and air conditioning (HVAC) technologies and...

44

System dynamics based models for selecting HVAC systems for office buildings: a life cycle assessment from carbon emissions perspective.  

E-Print Network [OSTI]

??This study aims to explore the life cycle environmental impacts of typical heating ventilation and air condition (HVAC) systems including variable air volume (VAV) system,… (more)

Chen, S

2011-01-01T23:59:59.000Z

45

Thermal Modeling for a HVAC Controlled Real-life Yong Fu1, Mo Sha1, Chengjie Wu1, Andrew Kutta1, Anna Leavey2, Chenyang Lu1,  

E-Print Network [OSTI]

Thermal Modeling for a HVAC Controlled Real-life Auditorium Yong Fu1, Mo Sha1, Chengjie Wu1, Andrew consumption in build- ings is heating, ventilation, and air conditioning (HVAC). For an HVAC system to provide, especially in large open spaces. To optimize HVAC control, it is important to establish accurate dynamic

Lu, Chenyang

46

Fouling of HVAC fin and tube heat exchangers  

SciTech Connect (OSTI)

Fin and tube heat exchangers are used widely in residential, commercial and industrial HVAC applications. Invariably, indoor and outdoor air contaminants foul these heat exchangers. This fouling can cause decreased capacity and efficiency of the HVAC equipment as well as indoor air quality problems related to microbiological growth. This paper describes laboratory studies to investigate the mechanisms that cause fouling. The laboratory experiments involve subjecting a 4.7 fins/cm (12 fins/inch) fin and tube heat exchanger to an air stream that contains monodisperse particles. Air velocities ranging from 1.5-5.2 m/s (295 ft/min-1024 ft/min) and particle sizes from 1--8.6 {micro}m are used. The measured fraction of particles that deposit as well as information about the location of the deposited material indicate that particles greater than about 1 {micro}m contribute to fouling. These experimental results are used to validate a scaling analysis that describes the relative importance of several deposition mechanisms including impaction, Brownian diffusion, turbophoresis, thermophoresis, diffusiophoresis, and gravitational settling. The analysis is extended to apply to different fin spacings and particle sizes typical of those found in indoor air.

Siegel, Jeffrey; Carey, Van P.

2001-07-01T23:59:59.000Z

47

HVAC Improvements for Existing Houses  

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

HVAC Improvements for Existing Houses HVAC Improvements for Existing Houses Speaker(s): Chryséis Bovagnet Date: September 5, 2002 - 12:00pm Location: Bldg. 90 Many older houses in the US are either not well designed from a thermal point of view or have HVAC (Heating Ventilation and Air Conditioning) systems in need of repairs or improvements. The building envelopes tend to have poor insulation and lots of leakage, and the HVAC systems are inefficient. The cooling/heating equipment is often located outside of the conditioned space (e.g. in attics or crawlspaces) with ducts that leak and have poor insulation, which cause energy loss and bad occupant comfort on peak days or in extreme climates. We developed a series of retrofits that will allow us to reduce the energy consumption of residential HVAC

48

Minimization of energy consumption in HVAC systems with data-driven models and an interior-point method  

E-Print Network [OSTI]

Minimization of energy consumption in HVAC systems with data-driven models and an interior online 13 June 2014 Keywords: HVAC Interior-point method Internal heat gain Multilayer perceptron-driven approach is applied to minimize energy consumption of a heating, ventilating, and air conditioning (HVAC

Kusiak, Andrew

49

Multi-carrier Signal Transmission through HVAC Ducts: Experimental Results for Channel Capacity  

E-Print Network [OSTI]

Multi-carrier Signal Transmission through HVAC Ducts: Experimental Results for Channel Capacity, for the first time, experimental results on channel capacity of heating, ventilation, and air-conditioning (HVAC through a building HVAC duct system demonstrate the ability to transmit with a spectral efficiency of 3

Stancil, Daniel D.

50

Seamless Handover in Buildings Using HVAC Ducts: A New System Architecture  

E-Print Network [OSTI]

Seamless Handover in Buildings Using HVAC Ducts: A New System Architecture Ariton E. Xhafa, Paisarn-- In this paper, we present an innovative solution to the handover problem in multi-story buildings using HVAC of the indoor wireless networks that use the heating, ventilation, and air conditioning (HVAC) ducts

Stancil, Daniel D.

51

RF propagation in an HVAC duct system: impulse response characteristics of the channel  

E-Print Network [OSTI]

RF propagation in an HVAC duct system: impulse response characteristics of the channel Pavel V, the heating, ventilation, and air conditioning (HVAC) duct system in buildings is a complex network of hollow at RF and microwave frequencies of com- mon interest. HVAC ducts can be used as a wireless communication

Stancil, Daniel D.

52

Tile of the document: HVAC system component-based modeling and implementation  

E-Print Network [OSTI]

1 Abstract Tile of the document: HVAC system component-based modeling and implementation Karam the foundation for modeling components that are used in HVAC systems (heating, ventilation, and air conditioning such functionalities. #12;2 HVAC system component-based modeling and implementation By Karam H. Rajab Scholarly

Austin, Mark

53

A Quasi-Dynamic HVAC and Building Simulation Methodology  

E-Print Network [OSTI]

This thesis introduces a quasi-dynamic building simulation methodology which complements existing building simulators by allowing transient models of HVAC (heating, ventilating and air-conditioning) systems to be created in an analogous way...

Davis, Clinton Paul

2012-07-16T23:59:59.000Z

54

Strategy Guideline: HVAC Equipment Sizing  

SciTech Connect (OSTI)

The heating, ventilation, and air conditioning (HVAC) system is arguably the most complex system installed in a house and is a substantial component of the total house energy use. A right-sized HVAC system will provide the desired occupant comfort and will run efficiently. This Strategy Guideline discusses the information needed to initially select the equipment for a properly designed HVAC system. Right-sizing of an HVAC system involves the selection of equipment and the design of the air distribution system to meet the accurate predicted heating and cooling loads of the house. Right-sizing the HVAC system begins with an accurate understanding of the heating and cooling loads on a space; however, a full HVAC design involves more than just the load estimate calculation - the load calculation is the first step of the iterative HVAC design procedure. This guide describes the equipment selection of a split system air conditioner and furnace for an example house in Chicago, IL as well as a heat pump system for an example house in Orlando, Florida. The required heating and cooling load information for the two example houses was developed in the Department of Energy Building America Strategy Guideline: Accurate Heating and Cooling Load Calculations.

Burdick, A.

2012-02-01T23:59:59.000Z

55

Empirical Methodologies for Improving HVAC Efficiency  

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

Empirical Methodologies for Improving HVAC Efficiency Empirical Methodologies for Improving HVAC Efficiency Speaker(s): Anil Aswani Date: September 21, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Michael Wetter This talk describes the use of empirical methodologies that we have developed for the purpose of improving heating, ventilation, and air-conditioning (HVAC) efficiency through better control algorithms and configuration. We show that semiparametric regression can both identify simplified models of thermal HVAC dynamics while also estimating time-varying heating loads using only real-time temperature measurements from thermostats. These models can be used with our learning-based model predictive control (LBMPC) method in order to improve the energy-efficiency of HVAC. Experiments on testbeds with different types of HVAC show the

56

Commercial Building HVAC: How it Affects People  

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

Commercial Building HVAC: How it Affects People Commercial Building HVAC: How it Affects People Speaker(s): William Fisk Date: November 13, 2000 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: David Faulkner Commercial building heating, ventilating, and air conditioning (HVAC) systems are designed primarily to maintain a reasonable level of thermal comfort while limiting first costs and energy consumption. However, research conducted predominately within the last decade suggests that commercial building HVAC significantly influences human outcomes other than thermal comfort, including the health, satisfaction, and work performance of the building's occupants. This presentation will review the relationships of these outcomes with HVAC system type, filtration system efficiency, indoor air temperature, and outside air ventilation rate.

57

Residential HVAC Data, Assumptions and Methodology for End-Use Forecasting with EPRI-REEPS 2.1  

E-Print Network [OSTI]

LBL-34045 UC-1600 Residential HVAC Data, Assumptions and Methodology for End-Use Forecasting-uses include Heating, Ventilation and Air Conditioning (HVAC). Our analysis uses the modeling framework provided by the HVAC module in the Residential End-Use Energy Planning System (REEPS), which was developed

58

Feasibility of Retrofitting Centralized HVAC Systems for Room-Level Zoning Tamim Sookoor, Brian Holben, Kamin Whitehouse  

E-Print Network [OSTI]

Feasibility of Retrofitting Centralized HVAC Systems for Room-Level Zoning Tamim Sookoor, Brian {sookoor,bnh4k,whitehouse}@cs.virginia.edu Abstract--Heating, ventilation, and cooling (HVAC) accounts's largest energy consumers. Many attempts have been made to optimize the control of HVAC systems

Whitehouse, Kamin

59

IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 53, NO. 2, FEBRUARY 2005 335 On the Capacity Limits of HVAC Duct Channel for  

E-Print Network [OSTI]

of HVAC Duct Channel for High-Speed Internet Access Ariton E. Xhafa, Member, IEEE, Ozan K. Tonguz, Member and experimental channel-capacity estimates of heating, ventilation, and air condi- tioning (HVAC) ducts based suppressed. Our experimental results also show that even in the case of more complex HVAC duct networks (i

Stancil, Daniel D.

60

Energy efficient HVAC system features thermal storage and heat recovery  

SciTech Connect (OSTI)

This article describes a HVAC system designed to efficiently condition a medical center. The topics of the article include energy efficient design of the HVAC system, incentive rebate program by the local utility, indoor air quality, innovative design features, operations and maintenance, payback and life cycle cost analysis results, and energy consumption.

Bard, E.M. (Bard, Rao + Athanas Consulting Engineering Inc., Boston, MA (United States))

1994-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Adaptive HVAC zone modeling for sustainable buildings  

Science Journals Connector (OSTI)

Control of energy flows within a building is critical to achieving optimal performance of heating, ventilation and air-conditioning (HVAC) systems. To design optimal HVAC control strategies, a dynamic model of the HVAC system – particularly the building zones that it services – is essential. As analysis of building energy consumption is facilitated by the accurate prediction of indoor environmental conditions, techniques that dynamically model HVAC zones are crucial, and as such, is an active area of research. This paper focuses on real-time HVAC zone model fitting and prediction techniques based on physical principles, as well as the use of genetic algorithms for optimization. The proposed approach is validated by comparing real-time HVAC zone model fitting and prediction against the corresponding experimental measurements. In addition, comparison with prediction results using an algorithm based on feedback-delayed Kalman filters has demonstrated the superiority of the proposed approach in terms of prediction accuracy.

Glenn Platt; Jiaming Li; Ronxin Li; Geoff Poulton; Geoff James; Josh Wall

2010-01-01T23:59:59.000Z

62

Deposition of biological aerosols on HVAC heat exchangers  

SciTech Connect (OSTI)

Many biologically active materials are transported as bioaerosols 1-10 {micro}m in diameter. These particles can deposit on cooling and heating coils and lead to serious indoor air quality problems. This paper investigates several of the mechanisms that lead to aerosol deposition on fin and tube heat exchangers. A model has been developed that incorporates the effects of several deposition mechanisms, including impaction, Brownian and turbulent diffusion, turbophoresis, thermophoresis, diffusiophoresis, and gravitational settling. The model is applied to a typical range of air velocities that are found in commercial and residential HVAC systems 1 - 6 m/s (200 - 1200 ft/min), particle diameters from 1 - 8 {micro}m, and fin spacings from 3.2 - 7.9 fins/cm (8 - 16 fins/inch or FPI). The results from the model are compared to results from an experimental apparatus that directly measures deposition on a 4.7 fins/cm (12 FPI) coil. The model agrees reasonably well with this measured data and suggests that cooling coils are an important sink for biological aerosols and consequently a potential source of indoor air quality problems.

Siegel, Jeffrey; Walker, Ian

2001-09-01T23:59:59.000Z

63

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.

64

ETME 422 -REFRIGERATION & HVAC SYSTEMS FALL 2011 LEC -10:00 -10:50am M W F RH 312  

E-Print Network [OSTI]

-1209(h) Office Hours: M-F 1-2p.m. Text: Heating, Ventilating, and Air Conditioning - Analysis and Design. -- Refrigeration and heating, ventilating and air-conditioning (HVAC) for comfort and industrial applications of the fundamentals of Heating, Ventilating, Air Conditioning, and Refrigeration as they relate to human comfort

Dyer, Bill

65

Applications of HVAC System Utilizing Building Thermal Mass in Japan  

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

Applications of HVAC System Utilizing Building Thermal Mass in Japan Applications of HVAC System Utilizing Building Thermal Mass in Japan Speaker(s): Katsuhiro Miura Date: January 27, 2012 - 10:00am Location: 90-3122 Seminar Host/Point of Contact: Michael Wetter Buildings have a large thermal capacity and it affects much on building thermal load for the HVAC system. The thermal mass can be utilized also to control the thermal load by storing thermal energy before HVAC operation. There are two ways to store thermal energy. One is by operating the HVAC system and the other is by natural ventilation, mainly at night. The latter could be combined with daily HVAC operation as a hybrid ventilation. Thermal mass storage is useful to decrease the hourly peak load and the daily thermal load and can be used for both cooling and heating purpose.

66

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

67

Non-Vapor Compression HVAC Technologies Report  

Broader source: Energy.gov [DOE]

While vapor-compression technologies have served heating, ventilation, and air-conditioning (HVAC) needs very effectively, and have been the dominant HVAC technology for close to 100 years, the conventional refrigerants used in vapor-compression equipment contribute to global climate change when released to the atmosphere. The Building Technologies Office is evaluating low-global warming potential (GWP) alternatives to vapor-compression technologies.

68

A robust CO2-based demand-controlled ventilation control strategy for multi-zone HVAC systems  

Science Journals Connector (OSTI)

There have been increasingly growing concerns over the quality of the air inside buildings and the associated energy use. The CO2-based demand-controlled ventilation DCV is one of the strategies that could offer a great opportunity to reduce energy consumption in HVAC systems. However, implementing CO2-based DCV under ASHRAE Standard 62.1 2004–2010 is not simple as it was under previous versions due to the changes in breathing-zone ventilating rate calculations. Thus, this paper provides insight into the performance of a multi-zone VAV system under different operating and ventilation conditions, discusses the difficulties in the CO2-based DCV, and proposes a robust DCV strategy based on the supply air CO2 concentration. The proposed strategy offers great benefits in terms of better indoor air control and improved energy efficiency. To evaluate the proposed strategy, energy simulations were performed on various USA locations and for a typical two-story office building conditioned by a VAV system. The results show that a significant energy saving could be achieved by implementing the proposed strategy as compared to the design-occupancy ASHRAE Standard 62.1 2010 multi-zone procedure and the amount of saving that could be up to 23% depends mainly on locations and the actual occupancy profile.

Nabil Nassif

2012-01-01T23:59:59.000Z

69

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

70

Energy Savings Potential and RD&D Opportunities for Commercial Building HVAC  

Broader source: Energy.gov [DOE]

This Building Technologies Office report assesses heating, ventilation, and air-conditioning (HVAC) technologies for U.S. commercial buildings to identify and provide analysis on 17 priority technology options in various stages of development.

71

Development of HVAC System Performance Criteria Using Factorial Design and DOE-2 Simulation  

E-Print Network [OSTI]

A new approach is described for the development of Heating, Ventilating, and Air-conditioning (HVAC) System Performance Criteria for the Texas Building Energy Design Standard. This approach integrates a design of experimental methodology and DOE-2...

Hou, D.; Jones, J. W.; Hunn, B. D.; Banks, J. A.

1996-01-01T23:59:59.000Z

72

Energy Savings Potential and RD&D Opportunities for Residential Building HVAC Systems  

Broader source: Energy.gov [DOE]

This report assesses 135 different heating, ventilation, and air-conditioning (HVAC) technologies for U.S. residential buildings to identify and provide analysis on 19 priority technology options in various stages of development.

73

Building America Whole-House Solutions for Existing Homes: Inverted Attic Bulkhead for HVAC Ductwork  

Broader source: Energy.gov [DOE]

This occupied test home received a modified truss system to accommodate ductwork within an inverted insulated bulkhead along the attic floor, which saves energy by placing heating, ventilating, and air-conditioning (HVAC) ductwork within the home's thermal boundary.

74

Research & Development Roadmap: Emerging HVAC Technologies  

Broader source: Energy.gov [DOE]

The Research and Development (R&D) Roadmap for Emerging Heating, Ventilation, and Air-Conditioning (HVAC) Technologies provides recommendations to the Building Technologies Office (BTO) on R&D activities to pursue that will aid in achieving BTO’s energy savings goals.

75

Co-design of control algorithm and embedded platform for building HVAC systems  

Science Journals Connector (OSTI)

The design of heating, ventilation and air conditioning (HVAC) systems is crucial for reducing energy consumption in buildings. As complex cyber-physical systems, HVAC systems involve three closely-related subsystems -- the control algorithm, the physical ... Keywords: building energy efficiency, co-design, platform-based design

Mehdi Maasoumy; Qi Zhu; Cheng Li; Forrest Meggers; Alberto Sangiovanni-Vincentelli

2013-04-01T23:59:59.000Z

76

Application of Multizone HVAC Control Using Wireless Sensor Networks and Actuating Vent Registers  

E-Print Network [OSTI]

Most residential heating, ventilating, and air conditioning (HVAC) systems are designed to treat the home as a single zone. Single zone control consists of one thermostat, in a central area of the house that controls the HVAC operation. In a single...

Watts, W.; Koplow, M.; Redfern, A.; Wright, P.

2007-01-01T23:59:59.000Z

77

Energy Savings with Energy-Efficient HVAC Systems in Commercial Buildings of Hong Kong  

E-Print Network [OSTI]

of the electricity in Hong Kong is consumed by commercial buildings, and heating, ventilation and air-conditioning (HVAC) is the largest end-user in such buildings, improving the efficiency of HVAC systems in commercial buildings, is the key measure to take in Hong...

Yang, J.; Chan, K.; Wu, X.

2006-01-01T23:59:59.000Z

78

Particle loading rates for HVAC filters, heat exchangers, and ducts Nomenclature  

E-Print Network [OSTI]

Particle loading rates for HVAC filters, heat exchangers, and ducts Nomenclature Afl surface area of floor (m2 ) bf fraction of bypass flow around the filter (dimensionless) Cout outdoor concentration on the filter per volume of air (mg/lm m3 ) Mf,tot total mass deposited on the filter per month of operation (g

Siegel, Jeffrey

79

Detection and diagnosis of faults and energy monitoring of HVAC systems with least-intrusive power analysis  

E-Print Network [OSTI]

Faults indicate degradation or sudden failure of equipment in a system. Widely existing in heating, ventilating, and air conditioning (HVAC) systems, faults always lead to inefficient energy consumption, undesirable indoor ...

Luo, Dong, 1966-

2001-01-01T23:59:59.000Z

80

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

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Discussion of an Optimization Scheme for the Ground Source Heat Pump System of HVAC  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China Renewable Energy Resources and a Greener Future Vol.VIII-13-3 Discussion of an Optimization Scheme for the Ground Source Heat Pump System of HVAC Wei Mu Suilin Wang Shuyuan Pan Yongzheng Shi Master Student... the Jurisdiction of Beijing Municipality (BJE10016200511). REFERENCES [1]Rongguang Wang,Yufeng Zhang,Yang,Xiaotong Zheng. Study on Direct Use Of Geothermal Energy For Heating And Its Energy Efficency Effects [J]. ACTA ENERGIAE SOLARIS SINICA, 2002, 23...

Mu, W.; Wang, S.; Pan, S.; Shi, Y.

2006-01-01T23:59:59.000Z

82

COMPARATIVE STUDY AMONG HYBRID GROUND SOURCE HEAT PUMP SYSTEM, COMPLETE GROUND SOURCE HEAT PUMP AND CONVENTIONAL HVAC SYSTEM  

SciTech Connect (OSTI)

In this paper, a hotel with hybrid geothermal heat pump system (HyGSHP) in the Pensacola is selected and simulated by the transient simulation software package TRNSYS [1]. To verify the simulation results, the validations are conducted by using the monthly average entering water temperature, monthly facility consumption data, and etc. And three types of HVAC systems are compared based on the same building model and HVAC system capacity. The results are presented to show the advantages and disadvantages of HyGSHP compared with the other two systems in terms of energy consumptions, life cycle cost analysis.

Jiang Zhu; Yong X. Tao

2011-11-01T23:59:59.000Z

83

Combined solar and internal load effects on selection of heat reclaim-economizer HVAC systems  

SciTech Connect (OSTI)

The concern for energy conservation has led to the development and use of heat recovery systems which reclaim the building internal heat before it is discarded in the exhaust air. On the other hand, economizer cycles have been widely used for many years in a variety of types of HVAC systems. Economizer cycles are widely accepted as a means to reduce operating time for chilling equipment when cool outside air is available. It has been suggested that heat reclaim systems should not be used in conjunction with an HVAC system which incorporates an economizer cycle because the economizer operation would result in heat being exhausted which might have been recovered. Others suggest that the economizer cycle can be used economically in a heat recovery system if properly controlled to maintain an overall building heat balance. This study looks at potential energy savings of such combined systems with particular emphasis on the effects of the solar load (amount of glass) and the internal load level (lights, people, appliances, etc.). For systems without thermal storage, annual energy savings of up to 60 percent are predicted with the use of heat reclaim systems in conjunction with economizers when the heat reclaim has priority. These results demonstrate the necessity of complete engineering evaluations if proper selection and operation of combined heat recovery and economizer cycles are to be obtained. This paper includes the basic methodology for making such evaluations.

Sauer, H.J. Jr.; Howell, R.H.; Wang, Z. (Missouri Univ., Rolla, MO (USA). Dept. of Mechanical Engineering)

1990-05-01T23:59:59.000Z

84

Continuous Energy Management of the HVAC&R System in an Office Building System Operation and Energy Consumption for the Eight Years after Building Completion  

E-Print Network [OSTI]

The authors continuously studied the energy consumption of a heating, ventilating, air- conditioning and refrigerating (HVAC&R) system in an office for the operation of the system in terms of its expected performance. A fault in the system control...

Akashi, Y.; Shinozaki, M.; Kusuda, R.; Ito, S.

2006-01-01T23:59:59.000Z

85

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...

86

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

87

Review of modeling methods for HVAC systems  

Science Journals Connector (OSTI)

Abstract This work presents the literature review of the methods used to model the heating, ventilation, and air conditioning (HVAC) systems. The model development is necessary for the study of the energy consumption of HVAC systems. Models are also required to simulate the different supervisory and local loop control strategies to improve the energy consumption efficiency. HVAC systems have complex structures consisting of heat and mass transfer equipment such as chiller, boiler, heating/cooling coils, and supply air ducts. HVAC systems also consist of several sensors and controllers for regulating the controllable variables such as zone temperature, supply air temperature, supply air fan speed, duct static pressure, and chilled water temperature at their set-points. To predict the energy consumption by the HVAC systems accurately, one needs to model the individual components either from the measured data or based on the knowledge of the underlying physical phenomenon. This results in three broad classes of the models known as data driven, physics based, and grey box models. In this paper, major data driven, physics based, and grey box modeling techniques reported in the recent literature are reviewed.

Abdul Afram; Farrokh Janabi-Sharifi

2014-01-01T23:59:59.000Z

88

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...

89

Ameren Illinois (Electric) - Custom, HVAC, and Motor Business Efficiency  

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

Ameren Illinois (Electric) - Custom, HVAC, and Motor Business Ameren Illinois (Electric) - Custom, HVAC, and Motor Business Efficiency Incentives Ameren Illinois (Electric) - Custom, HVAC, and Motor Business Efficiency Incentives < Back Eligibility Commercial Industrial Multi-Family Residential Nonprofit Savings Category Other Heating & Cooling Commercial Heating & Cooling Cooling Home Weatherization Construction Commercial Weatherization Design & Remodeling Manufacturing Sealing Your Home Ventilation Heat Pumps Heating Appliances & Electronics Commercial Lighting Lighting Water Heating Maximum Rebate $600,000/year/facility. Incentives $1-$200,000: paid at 100% Incentives $200,000-$600,000: paid at 50% Custom: 50% of incremental cost Retro-Commissioning: $200,000/year/facility; $100,000/project Leak Survey: $10,000

90

Chapter 5: Lighting, HVAC, and Plumbing  

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

: Lighting, : Lighting, HVAC, and Plumbing High-Performance Engineering Design Lighting System Design Mechanical System Design Central Plant Systems Plumbing and Water Use Building Control Systems Electrical Power Systems Metering LANL | Chapter 5 High-Performance Engineering Design Lighting, HVAC, and Plumbing By now, the building envelope serves multiple roles. It protects the occupants from changing weather condi- tions and it plays a key part in meeting the occupants' comfort needs. The heating, ventilating, air-conditioning, and lighting (HVAC&L) systems complement the archi- tectural design, govern the building's operation and maintenance costs, and shape the building's long-term environmental impact. The architectural design maximizes the potential for a high-performance building, but it is the

91

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

92

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

93

DOE Convening Report on Certification of Commercial HVAC and CRE Products  

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

Convening Report on Certification of Commercial HVAC and CRE Products, October 2, 2012 Convening Report on Certification of Commercial HVAC and CRE Products, October 2, 2012 1 U.S. DEPARTMENT OF ENERGY CONVENING REPORT ON THE FEASIBILITY OF A NEGOTIATED RULEMAKING TO REVISE THE CERTIFICATION PROGRAM FOR COMMERCIAL HEATING, VENTILATING AIR CONDITIONING AND COMMERCIAL REFRIGERATION EQUIPMENT October 2, 2012 Alan W. Strasser, Esq., MA Convener

94

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

95

HVAC systems in the current stock of U. S. K-12 schools. Final report, May 91-Mar 92  

SciTech Connect (OSTI)

The report summarizes information on heating, ventilating, and air-conditioning (HVAC) systems commonly found in U.S. school buildings and the effect that operating these systems has on indoor radon levels. The report describes the ability of various HVAC systems to pressurize and ventilate classroom spaces, how they operate, and how they are controlled. Some information is given to compare systems from the standpoint of energy use, cost, and their ability to maintain stable levels of static pressure in classrooms and/or to adequately ventilate the spaces. There do not appear to be any well defined trends in types of HVAC systems involved in current school building construction and modification. Systems looked at include those using reheat and/or mixing, unit ventilators (UVs), and two-fan, dual-duct variable air volume (VAV) systems.

Parker, J.D.

1992-07-01T23:59:59.000Z

96

Energy-Efficient Building HVAC Control Using Hybrid System LBMPC  

E-Print Network [OSTI]

Improving the energy-efficiency of heating, ventilation, and air-conditioning (HVAC) systems has the potential to realize large economic and societal benefits. This paper concerns the system identification of a hybrid system model of a building-wide HVAC system and its subsequent control using a hybrid system formulation of learning-based model predictive control (LBMPC). Here, the learning refers to model updates to the hybrid system model that incorporate the heating effects due to occupancy, solar effects, outside air temperature (OAT), and equipment, in addition to integrator dynamics inherently present in low-level control. Though we make significant modeling simplifications, our corresponding controller that uses this model is able to experimentally achieve a large reduction in energy usage without any degradations in occupant comfort. It is in this way that we justify the modeling simplifications that we have made. We conclude by presenting results from experiments on our building HVAC testbed, which s...

Aswani, Anil; Taneja, Jay; Krioukov, Andrew; Culler, David; Tomlin, Claire

2012-01-01T23:59:59.000Z

97

Theoretical Minimum Energy Use of a Building HVAC System  

E-Print Network [OSTI]

This paper investigates the theoretical minimum energy use required by the HVAC system in a particular code compliant office building. This limit might be viewed as the "Carnot Efficiency" for HVAC system. It assumes that all ventilation and air...

Tanskyi, O.

2011-01-01T23:59:59.000Z

98

Pre-Commercial Demonstration of Cost-Effective Advanced HVAC Controls- 2014 BTO Peer Review  

Broader source: Energy.gov [DOE]

Presenter: Hayden Reeve, United Technologies Research Center Optimal control coordination of heating, ventilation, and air conditioning (HVAC) equipment can reduce energy by more than 20% over current building automation systems (BASs) but is not widely deployed due to challenges with complexity, scalability, and deployment.

99

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

100

Energy Department Releases Roadmaps on HVAC Technologies, Water...  

Energy Savers [EERE]

Energy Department Releases Roadmaps on HVAC Technologies, Water Heating, Appliances, and Low-GWP Refrigerants Energy Department Releases Roadmaps on HVAC Technologies, Water...

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Market assessment for active solar heating and cooling products. Category B: a survey of decision-makers in the HVAC marketplace. Final report  

SciTech Connect (OSTI)

A comprehensive evaluation of the market for solar heating and cooling products for new and retrofit markets is reported. The emphasis is on the analysis of solar knowledge among HVAC decision makers and a comprehensive evaluation of their solar attitudes and behavior. The data from each of the following sectors are described and analyzed: residential consumers, organizational and manufacturing buildings, HVAC engineers and architects, builders/developers, and commercial/institutional segments. (MHR)

None

1980-09-01T23:59:59.000Z

102

HVAC filtration for controlling infectious airborne disease transmission in indoor environments: Predicting risk reductions and operational costs  

Science Journals Connector (OSTI)

Abstract This work describes and applies a methodology for estimating the impact of recirculating heating, ventilating, and air-conditioning (HVAC) particle filters on the control of size-resolved infectious aerosols in indoor environments using a modified version of the Wells-Riley model for predicting risks of infectious disease transmission. Estimates of risk reductions and associated operational costs of both HVAC filtration and equivalent outdoor air ventilation are modeled and compared using a case study of airborne transmission of influenza in a hypothetical office space. Overall, recirculating HVAC filtration was predicted to achieve risk reductions at lower costs of operation than equivalent levels of outdoor air ventilation, particularly for MERV 13–16 filters. Medium efficiency filtration products (MERV 7–11) are also inexpensive to operate but appear less effective in reducing infectious disease risks.

Parham Azimi; Brent Stephens

2013-01-01T23:59:59.000Z

103

Chapter 19: HVAC Controls (DDC/EMS/BAS) Evaluation Protocol  

SciTech Connect (OSTI)

The HVAC Controls Evaluation Protocol is designed to address evaluation issues for direct digital controls/energy management systems/building automation systems (DDC/EMS/BAS) that are installed to control heating, ventilation, and air-conditioning (HVAC) equipment in commercial and institutional buildings. (This chapter refers to the DDC/EMS/BAS measure as HVAC controls.) This protocol may also be applicable to industrial facilities such as clean rooms and labs, which have either significant HVAC equipment or spaces requiring special environmental conditions. This protocol addresses only HVAC-related equipment and the energy savings estimation methods associated with installing such control systems as an energy efficiency measure. The affected equipment includes: Air-side equipment (air handlers, direct expansion systems, furnaces, other heating- and cooling-related devices, terminal air distribution equipment, and fans); Central plant equipment (chillers, cooling towers, boilers, and pumps). These controls may also operate or affect other end uses, such as lighting, domestic hot water, irrigation systems, and life safety systems such as fire alarms and other security systems. Considerable nonenergy benefits, such as maintenance scheduling, system component troubleshooting, equipment failure alarms, and increased equipment lifetime, may also be associated with these systems. When connected to building utility meters, these systems can also be valuable demand-limiting control tools. However, this protocol does not evaluate any of these additional capabilities and benefits.

Romberger, J.

2014-11-01T23:59:59.000Z

104

Plutonium Finishing Plant (PFP) HVAC System Component Index  

SciTech Connect (OSTI)

This document lists safety class (SC) and safety significant (SS) components for the Heating Ventilation Air Conditioning (HVAC) and specifies the critical characteristics for Commercial Grade Items (CGI), as required by HNF-PRO-268 and HNF-PRO-18 19. These are the minimum specifications that the equipment must meet in order to properly perform its safety function. There may be several manufacturers or models that meet the critical characteristics for any one item. The Plutonium Finishing Plant (PFP) HVAC System includes sub-systems 25A through 25K. Specific system boundaries and justifications are contained in HNF-SD-CP-SDD-005, ''Definition and Means of Maintaining the Ventilation System Confinement Portion of the PFP Safety Envelope.'' The procurement requirements associated with the system necessitates procurement of some system equipment as Commercial Grade Items in accordance with HNF-PRO-268, ''Control of Purchased Items and Services.''

DIAZ, E.N.

2000-03-30T23:59:59.000Z

105

NREL's Advanced Thermal Conversion Laboratory at the Center for Buildings and Thermal Systems: On the Cutting-Edge of HVAC and CHP Technology (Revised)  

SciTech Connect (OSTI)

This brochure describes how the unique testing capabilities of NREL's Advanced Thermal Conversion Laboratory at the Center For Buildings and Thermal Systems can help industry meet the challenge of developing the next generation of heating, ventilating, and air-conditioning (HVAC) and combined heat and power (CHP) equipment and concepts.

Not Available

2005-09-01T23:59:59.000Z

106

HVAC system optimization with CO2 concentration control using genetic algorithms  

Science Journals Connector (OSTI)

This study describes the use of genetic algorithms (GAs) for operating standard HVAC systems (HVAC—heating, ventilation and air conditioning) in order to optimize performance, primarily with regard to power saving. Genetic algorithms were introduced as an instrument for solving optimization problems. Analytic optimization procedures are widely used in other fields of engineering, but they are difficult to operate within HVAC systems, because the range of the research is usually too broad, the problems are not linear but rather discontinuous, and they mostly have complex limitations. This is why for this type of system genetic algorithms are used, since they have the qualities of robustness and efficiency that are crucial for finding the optimal solution. A simulation is conducted in order to demonstrate how much power can be saved by using the suggested method of CO2 concentration control in a standard HVAC system. In addition to Matlab Simulink, the suggested method is verified with Energy software.

Velimir Congradac; Filip Kulic

2009-01-01T23:59:59.000Z

107

Building America Best Practices Series Vol. 14: Energy Renovations- HVAC: A Guide for Contractors to Share with Homeowners  

Broader source: Energy.gov [DOE]

This guide, which is part of a series of Best Practices guides produced by DOE’s Building America program, describes ways homeowners can reduce their energy costs and improve the comfort, health, and safety of their homes by upgrading their heating, ventilation, and air conditioning (HVAC) equipment.

108

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

109

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

110

Implementation of a Scenario-based MPC for HVAC Systems  

E-Print Network [OSTI]

Implementation of a Scenario-based MPC for HVAC Systems: an Experimental Case Study Alessandra, Ventilation and Air Conditioning (HVAC) systems play a fundamental role in maintaining acceptable thermal energy savings potential. Developing effective MPC-based control strategies for HVAC systems

Johansson, Karl Henrik

111

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

112

HVAC: Maintaining HVAC equipment with air intake filters  

Science Journals Connector (OSTI)

Airborne debris, such as domestic waste, leaves, pollen, insects and even plastic carrier bags is the leading cause of fouling and clogging of cooling towers, heat exchangers, air cooled chillers and other HVAC systems. Richard Betts, managing director of UK-based RAB Specialist Engineers, provides Filtration+Separation with some practical advice on how to maintain HVAC equipment.

Richard Betts

2013-01-01T23:59:59.000Z

113

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.

114

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

115

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

116

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

117

Quantitative Methods for Comparing Different HVAC Control Schemes  

E-Print Network [OSTI]

Experimentally comparing the energy usage and comfort characteristics of different controllers in heating, ventilation, and air-conditioning (HVAC) systems is difficult because variations in weather and occupancy conditions preclude the possibility of establishing equivalent experimental conditions across the order of hours, days, and weeks. This paper is concerned with defining quantitative metrics of energy usage and occupant comfort, which can be computed and compared in a rigorous manner that is capable of determining whether differences between controllers are statistically significant in the presence of such environmental fluctuations. Experimental case studies are presented that compare two alternative controllers (a schedule controller and a hybrid system learning-based model predictive controller) to the default controller in a building-wide HVAC system. Lastly, we discuss how our proposed methodology may also be able to quantify the efficiency of other building automation systems.

Aswani, Anil; Taneja, Jay; Krioukov, Andrew; Culler, David; Tomlin, Claire

2012-01-01T23:59:59.000Z

118

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

119

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

120

Multi-objective optimization of HVAC system with an evolutionary computation algorithm  

Science Journals Connector (OSTI)

A data-mining approach for the optimization of a HVAC (heating, ventilation, and air conditioning) system is presented. A predictive model of the HVAC system is derived by data-mining algorithms, using a dataset collected from an experiment conducted at a research facility. To minimize the energy while maintaining the corresponding IAQ (indoor air quality) within a user-defined range, a multi-objective optimization model is developed. The solutions of this model are set points of the control system derived with an evolutionary computation algorithm. The controllable input variables — supply air temperature and supply air duct static pressure set points — are generated to reduce the energy use. The results produced by the evolutionary computation algorithm show that the control strategy saves energy by optimizing operations of an HVAC system.

Andrew Kusiak; Fan Tang; Guanglin Xu

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hvac heating ventilating" 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

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

122

Decomposition of formaldehyde by EPD photocatalyst filters in HVAC  

Science Journals Connector (OSTI)

This study used electrophoretic deposition (EPD) to apply titanium oxide (TiO2) coating on stainless steel filters and investigated the effectiveness of photocatalytic oxidation of formaldehyde by TiO2 under various conditions of heating ventilation air conditioning (HVAC). The results showed photocatalytic efficiency could reach 35.59% at 21 °C and 36.39% at 26 °C with 7 photocatalyst filters and 5 UVC lamps, the overall efficiency of formaldehyde removal of 52.37% at 21 °C, and 56.8% at 26 °C. By all experimental data can be found that the temperature for the photocatalytic performance is not obvious in the range of this study.

Chien-Chih Chen; Ching-Song Jwo; Tun-Ping Teng

2011-01-01T23:59:59.000Z

123

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

124

EECBG Success Story: HVAC Upgrade Saving Money, Protecting History...  

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

HVAC Upgrade Saving Money, Protecting History EECBG Success Story: HVAC Upgrade Saving Money, Protecting History November 2, 2010 - 5:37pm Addthis A new heating and cooling system...

125

Practical Approach in Design of HVAC Systems Utilizing Geothermal Energy  

Science Journals Connector (OSTI)

Geothermal is the Earth’s thermal energy. In recent years geothermal energy has been utilized for generation of electricity, heating and air conditioning (HVAC). Geothermal HVAC systems are cost effective, energy

M. Fathizadeh; D. Seims

2014-01-01T23:59:59.000Z

126

Heat recovery highlighted in state-of-the-art HVAC system  

SciTech Connect (OSTI)

The new $35 million corporate headquarters building of Steelcase, Inc., provides 385,000 sq. ft. of office space and support areas for more than 500 employees. The building embodies state-of-the-art energy storage and heat recovery systems, and the extensive use of computers to predict, monitor, and control space comfort conditions. The heat storage and recovery equipment are described.

Speyer, J.R.

1984-11-01T23:59:59.000Z

127

Renovating Residential HVAC Systems HVAC Systems  

E-Print Network [OSTI]

- 1 - LBNL 57406 Renovating Residential HVAC Systems HVAC Systems J.A. McWilliams and I.S. Walker and Air Conditioning), and Stacy Hunt and Ananda Harzell (IBACOS). #12;- 3 - Renovating Residential HVAC Guideline for Residential HVAC Retrofits (http

128

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

129

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

130

EVALUATION OF EMERGING DIAGNOSTIC TOOLS FOR COMMERCIAL HVAC SYSTEMS Hannah Friedman Mary Ann Piette  

E-Print Network [OSTI]

EVALUATION OF EMERGING DIAGNOSTIC TOOLS FOR COMMERCIAL HVAC SYSTEMS Hannah Friedman Mary Ann Piette for commercial HVAC systems. We present a brief description of the diagnostic tools, and then focus on evaluating, ventilating, and air-conditioning (HVAC) systems (Gregerson, 1997, Claridge et al., 2000). If these energy

131

Fuzzy Rule Reduction and Tuning of Fuzzy Logic Controllers for a HVAC System  

E-Print Network [OSTI]

Fuzzy Rule Reduction and Tuning of Fuzzy Logic Controllers for a HVAC System R. Alcal´a, J. Alcal, Ventilating and Air Conditioning (HVAC) Systems are equip- ments usually implemented for maintaining satisfactory comfort conditions in build- ings. The design of Fuzzy Logic Controllers (FLCs) for HVAC Systems

Granada, Universidad de

132

Life Cycle cost Analysis of Waste Heat Operated Absorption Cooling Systems for Building HVAC Applications  

E-Print Network [OSTI]

was used to calculate the PWC of the system for annual operating hours of 8760 and the same is compared with the electric based vapour compression chiller (VCRS) of same capacity. The life cycle cost (LCC) of waste heat operated absorption chiller...

Saravanan, R.; Murugavel, V.

2010-01-01T23:59:59.000Z

133

Pedernales Electric Cooperative - HVAC Rebate Program | Department of  

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

Pedernales Electric Cooperative - HVAC Rebate Program Pedernales Electric Cooperative - HVAC Rebate Program Pedernales Electric Cooperative - HVAC Rebate Program < Back Eligibility Commercial Residential Commercial Residential Savings Category Heating & Cooling Commercial Heating & Cooling Cooling Heat Pumps Program Info State Texas Program Type Utility Rebate Program Utility Rebate Program Rebate Amount Central AC with Gas Furnace: $300 - $400/unit Heat Pump: $400 - $500/unit Dual-Fuel Heat Pump: $400 - $500/unit Geothermal Heat Pump: $1,000/unit Water-Source Heat Pump: $1,000/unit Provider Pedernales Electric Cooperative Pedernales Electric Cooperative offers equipment rebates to members who install energy efficient HVAC equipment. Eligible equipment includes:

134

Report on HVAC option selections for a relocatable classroom energy and indoor environmental quality field study  

SciTech Connect (OSTI)

It is commonly assumed that efforts to simultaneously develop energy efficient building technologies and to improve indoor environmental quality (IEQ) are unfeasible. The primary reason for this is that IEQ improvements often require additional ventilation that is costly from an energy standpoint. It is currently thought that health and productivity in work and learning environments requires adequate, if not superior, IEQ. Despite common assumptions, opportunities do exist to design building systems that provide improvements in both energy efficiency and IEQ. This report outlines the selection of a heating, ventilation, and air conditioning (HVAC) system to be used in demonstrating such an opportunity in a field study using relocatable school classrooms. Standard classrooms use a common wall mounted heat pump HVAC system. After reviewing alternative systems, a wall-mounting indirect/direct evaporative cooling system with an integral hydronic gas heating is selected. The anticipated advantages of this system include continuous ventilation of 100 percent outside air at or above minimum standards, projected cooling energy reductions of about 70 percent, inexpensive gas heating, improved airborne particle filtration, and reduced peak load electricity use. Potential disadvantages include restricted climate regions and possible increases in indoor relative humidity levels under some conditions.

Apte, Michael G.; Delp, Woody W.; Diamond, Richard C.; Hodgson, Alfred T.; Kumar, Satish; Rainer, Leo I.; Shendell, Derek G.; Sullivan, Doug P.; Fisk, William J.

2001-10-11T23:59:59.000Z

135

Screening Analysis for EPACT-Covered Commercial HVAC and Water-Heating Equipment  

SciTech Connect (OSTI)

The Energy Policy and Conservation Act (EPCA) as amended by the Energy Policy Act of 1992 (EPACT) establishes that the U.S. Department of Energy (DOE) regulate efficiency levels of certain categories of commercial heating, cooling, and water-heating equipment. EPACT establishes the initial minimum efficiency levels for products falling under these categories, based on ASHRAE/IES Standard 90.1-1989 requirements. EPCA states that, if ASHRAE amends Standard 90.1-1989 efficiency levels, then DOE must establish an amended uniform national manufacturing standard at the minimum level specified in the amended Standard 90.1 and that it can establish higher efficiency levels if they would result in significant additional energy savings. 011Standard 90.1-1999 increases minimum efficiency levels for some of the equipment categories covered by EPCA 92. DOE conducted a screening analysis to determine the energy-savings potential for EPACT-covered products meet and exceeding these levels. This paper describes the methodology, data assumptions, and results of the analysis.

Somasundaram, Sriram; Armstrong, Peter R; Belzer, David B; Gaines, Suzanne C; Hadley, Donald L; Smith, David L; Winiarski, David W

2000-04-25T23:59:59.000Z

136

2014-12-22 Issuance: Alternative Efficiency Determination Methods, Basic Model Definition, and Compliance for Commercial HVAC, Refrigeration, and Water Heating Equipment; Final Rule  

Broader source: Energy.gov [DOE]

This document is a pre-publication Federal Register final rule regarding alternative efficiency determination methods, basic model definition, and compliance for commercial HVAC, refrigeration, and water heating equipment , as issued by the Deputy Assistant Secretary for Energy Efficiency on December 22, 2014. Though it is not intended or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

137

Best practices guide for residential HVAC Retrofits  

SciTech Connect (OSTI)

This best practices guide for residential HVAC system retrofits is aimed at contractors who want guidance on delivering energy efficient, cost effective and innovative products. It has been developed around the idea of having packages of changes to the building HVAC system and building envelope that are climate and house construction dependent. These packages include materials, procedures and equipment and are designed to remove some of the guesswork from a builder, contractor, installer or homeowner decisions about how best to carry out HVAC changes. The packages are not meant to be taken as rigid requirements--instead they are systems engineered guidelines that form the basis for energy efficient retrofits. Similar approaches have been taken previously for new construction to develop extremely energy efficient homes that are comfortable safe and durable, and often cost less than standard construction. This is best epitomized by the Building America program whose partners have built thousands of residences throughout the U.S. using these principles. The differences between retrofitting and new construction tend to limit the changes one can make to a building, so these packages rely on relatively simple and non-intrusive technologies and techniques. The retrofits also focus on changes to a building that will give many years of service to the occupants. Another key aspect of these best practices is that we need to know how a house is working so that we know what parts have the potential for improvement. To do this we have put together a set of diagnostic tools that combine physical measurements and checklists/questionnaires. The measured test results, observations and homeowner answers to questions are used to direct us towards the best retrofits applicable to each individual house. The retrofits will depend on the current condition of the building envelope and HVAC system, the local climate, the construction methods used for the house, and the presence of various energy saving systems (e.g., a Heat Recovery Ventilator) and/or materials. This is just like a doctor referring a patient for blood tests or x-rays before actually performing surgery. This way the doctor can be sure that he does the right thing. To take this analogy further--we can borrow from the medical profession and say that the first thought when retrofitting a house is to do no harm, i.e., do not make changes that could make the house worse to live in.

Walker, Iain S.

2003-08-11T23:59:59.000Z

138

Building Technologies Office: Recovery Act-Funded HVAC Research Projects  

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

HVAC Research Projects to someone by E-mail HVAC Research Projects to someone by E-mail Share Building Technologies Office: Recovery Act-Funded HVAC Research Projects on Facebook Tweet about Building Technologies Office: Recovery Act-Funded HVAC Research Projects on Twitter Bookmark Building Technologies Office: Recovery Act-Funded HVAC Research Projects on Google Bookmark Building Technologies Office: Recovery Act-Funded HVAC Research Projects on Delicious Rank Building Technologies Office: Recovery Act-Funded HVAC Research Projects on Digg Find More places to share Building Technologies Office: Recovery Act-Funded HVAC Research Projects on AddThis.com... About Take Action to Save Energy Partner with DOE Activities Appliances Research Building Envelope Research Windows, Skylights, & Doors Research Space Heating & Cooling Research

139

Bus HVAC energy consumption test method based on HVAC unit behavior  

Science Journals Connector (OSTI)

This paper presents a test method for determination of energy consumption of bus HVAC unit. The energy consumption corresponds to a bus engine fuel consumption increase during the HVAC unit operation period. The HVAC unit energy consumption is determined from the unit input power, which is measured under several levels of bus engine speeds and at different levels of testing heat load in the laboratory environment. Since the bus engine fuel consumption is incrementally induced by powering an HVAC unit, the results are subsequently recalculated to the unit fuel consumption under the defined road cycles in terms of standardized diesel engine. The method is likewise applicable either for classic or electric HVAC units with a main consumer (compressor or high voltage alternator) mechanically driven directly from the bus engine and also for electric HVAC units supplied from an alternative electric energy source in case of hybrid or fully electric buses.

M. Hegar; M. Kolda; M. Kopecka; V. Rajtmajer; A. Ryska

2013-01-01T23:59:59.000Z

140

HVAC Equipment Rebate Program | Department of Energy  

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

HVAC Equipment Rebate Program HVAC Equipment Rebate Program HVAC Equipment Rebate Program < Back Eligibility Agricultural Commercial Industrial Installer/Contractor Institutional Multi-Family Residential Nonprofit Schools Savings Category Heating & Cooling Commercial Heating & Cooling Heating Cooling Heat Pumps Maximum Rebate Rebates of greater than $5,000 require pre-approval Program Info Funding Source Efficiency Vermont Public Benefit Fund Expiration Date 06/30/2013 State Vermont Program Type State Rebate Program Rebate Amount Varies depending on technology and efficiency Provider Efficiency Vermont NOTE: Rebate reservations are required for all boiler and furnace projects. Efficiency Vermont offers rebates for commercial installations of high-efficiency HVAC equipment and controls. For businesses and purchases

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Estimates of HVAC filtration efficiency for fine and ultrafine particles of outdoor origin  

Science Journals Connector (OSTI)

Abstract This work uses 194 outdoor particle size distributions (PSDs) from the literature to estimate single-pass heating, ventilating, and air-conditioning (HVAC) filter removal efficiencies for PM2.5 and ultrafine particles (UFPs: HVAC filters identified in the literature. Filters included those with a minimum efficiency reporting value (MERV) of 5, 6, 7, 8, 10, 12, 14, and 16, as well as HEPA filters. We demonstrate that although the MERV metric defined in ASHRAE Standard 52.2 does not explicitly account for UFP or PM2.5 removal efficiency, estimates of filtration efficiency for both size fractions increased with increasing MERV. Our results also indicate that outdoor PSD characteristics and assumptions for particle density and typical size-resolved infiltration factors (in the absence of HVAC filtration) do not drastically impact estimates of HVAC filter removal efficiencies for PM2.5. The impact of these factors is greater for UFPs; however, they are also somewhat predictable. Despite these findings, our results also suggest that MERV alone cannot always be used to predict UFP or PM2.5 removal efficiency given the various size-resolved removal efficiencies of different makes and models, particularly for MERV 7 and MERV 12 filters. This information improves knowledge of how the MERV designation relates to PM2.5 and UFP removal efficiency for indoor particles of outdoor origin. Results can be used to simplify indoor air quality modeling efforts and inform standards and guidelines.

Parham Azimi; Dan Zhao; Brent Stephens

2014-01-01T23:59:59.000Z

142

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.

143

Self-Correcting HVAC Controls: Algorithms for Sensors and Dampers in Air-Handling Units  

SciTech Connect (OSTI)

This report documents the self-correction algorithms developed in the Self-Correcting Heating, Ventilating and Air-Conditioning (HVAC) Controls project funded jointly by the Bonneville Power Administration and the Building Technologies Program of the U.S. Department of Energy. The algorithms address faults for temperature sensors, humidity sensors, and dampers in air-handling units and correction of persistent manual overrides of automated control systems. All faults considered create energy waste when left uncorrected as is frequently the case in actual systems.

Fernandez, Nicholas; Brambley, Michael R.; Katipamula, Srinivas

2009-12-31T23:59:59.000Z

144

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

145

HVAC Market Study:  

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

HVAC Market Study: Understanding how energy efficient products get to market Fall 2014 through Winter 2015 Research Manager: Carrie Cobb, clcobb@bpa.gov, 503-230-4985 HVAC systems...

146

Combining HVAC energy conservation measures to achieve energy savings over standard requirements  

Science Journals Connector (OSTI)

Abstract This paper presents the energy savings over the minimum American Society of Heating Refrigeration and Air-Conditioning Engineers (ASHRAE) Standard 90.1-2010 requirements due to the combination of two or three HVAC energy conservation measures using EnergyPlus simulation software. Prototype commercial building models, which satisfy the requirements of ASHRAE Standard 90.1-2010 were used as base-cases. Five prototype commercial buildings, eight HVAC systems, and eight climate zones were considered. Four cases were studied for the combination: energy recovery ventilation (ERV) and demand control ventilation (DCV); ERV and Multiple-zone variable air volume (VAV) System Ventilation Optimization (VentOpt); ERV, DCV and VentOpt; and Single Zone VAV controls, and kitchen transfer air. Of the four cases studied, the integration of ERV and DCV, which was applied to primary school and standalone retail prototype buildings, provided a maximum savings of 1.93% and 8.10% respectively compared to the base-cases.

Teshome Edae Jiru

2014-01-01T23:59:59.000Z

147

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

148

HVAC Program  

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

to support our goal of achieving regional efficiency targets. Commercial Ductless Heat Pumps A new BPA Qualified measure has been available since April 2011. The measure...

149

HVAC Maintenance and Technologies  

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

HVAC - HVAC - Maintenance and Technologies Federal Utility Partnership Working Group Meeting Providence, Rhode Island April 15, 2010 BY Ramin Faramarzi, P.E. Technology Test Centers (TTC) Design and Engineering Services Southern California Edison (SCE) www.sce.com/rttc 2 Outline * Introduction to SCE's TTC * Overview of energy challenges in California (CA) * Role of HVAC in CA's energy and demand equations * Factors affecting HVAC performance * Focus on SCE's research on maintenance faults * Next generation of HVAC equipment * HVAC technologies on SCE's TTC radar * Black boxes - do they all work? 3 SCE's Technology Test Centers * SCE applied research facilities located in Irwindale, CA comprised of 3 test beds: * Refrigeration * HVAC * Lighting * Coming Soon! - A new ZNE lab 4 Refrigeration Testing

150

HVAC Installed Performance  

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

HVAC Installed Performance HVAC Installed Performance ESI, Tim Hanes Context * The building envelope has historically been the focus in residential homes. * The largest consumer of energy in residential homes is typically the HVAC system. * Testing the performance of the HVAC system has not been pursued to its full potential. Technical Approach * Currently very little performance testing is being done to the HVAC system. * The only way to know if a HVAC system is operating correctly is to measure the Btu/h. * This should be done at the equipment and at the the system. Recommended Guidance * Training of HVAC technicians, installers, and salespeople is a must. * If only the technician is trained than implementing the change will not happen. * Public awareness of proper installation and its

151

HVAC Efficiency Controls Could Mean Significant Savings | Department of  

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

HVAC Efficiency Controls Could Mean Significant Savings HVAC Efficiency Controls Could Mean Significant Savings HVAC Efficiency Controls Could Mean Significant Savings April 27, 2012 - 11:58am Addthis HVAC Efficiency Controls Could Mean Significant Savings April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs What does this mean for me? Commercial building owners could save an average 38% on their heating & cooling bills just by installing a few new controls onto their HVAC systems. According to a new report from Pacific Northwest National Lab, commercial building owners could save an average 38 percent on their heating and cooling bills just by installing a few new controls onto their HVAC systems. These findings mean significant potential savings for building owners who use commercial rooftop systems - but there's just one problem: the

152

Connexus Energy - Residential Efficient HVAC Rebate Program | Department of  

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

Connexus Energy - Residential Efficient HVAC Rebate Program Connexus Energy - Residential Efficient HVAC Rebate Program Connexus Energy - Residential Efficient HVAC Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Cooling Heat Pumps Program Info Expiration Date 12/31/2013 State Minnesota Program Type Utility Rebate Program Rebate Amount Air Source Heat Pumps: $480 - $630 Ductless Heat Pump: $150 Geothermal Heat Pump: $200/ton Provider Connexus Energy Connexus Energy offers rebates for residential customers to improve the energy efficiency of homes. Rebates are available for air source heat pumps, ductless heat pumps and ground-source heat pumps. Equipment must meet all efficiency standards listed on the web site, and must be installed by a certified HVAC contractor. Contact Connexus Energy for other program

153

Sound quality descriptors for HVAC equipment from ARI Standards  

Science Journals Connector (OSTI)

The Air Conditioning and Refrigeration Institute (ARI) has several standards that provide methods to evaluate the sound quality of heating ventilating and air?conditioning (HVAC) equipment. These include Standard 270 Sound rating of outdoor unitary equipment Standard 350 Sound rating of non?ducted indoor air?conditioning equipment and Standard 1140P Procedures for evaluating sound quality of HVAC equipment. The preferred method in these standards is best described in Standard 1140P which uses one?third octave band sound power levels that are weighted to adjust for the sensitivity to frequency distribution and presence of tones and are then converted to a single number sound quality indicator. The tone adjustment is based on the projection of a given one?third octave band level relative to the average of the adjacent one?third octave bands. An alternate use of Zwicker method B to determine loudness and loudness level is also provided in ARI Standard 1140P. These standards provide a convenient method by which complex sounds for similar products may be compared.

2003-01-01T23:59:59.000Z

154

Warming impact on energy use of HVAC system in buildings of different thermal qualities and in different climates  

Science Journals Connector (OSTI)

Abstract In order to combat climate change, energy use in the building must be further reduced. Heating ventilation and air conditioning (HVAC) systems in residential buildings account for considerable fraction of global energy consumption. The potential contribution the domestic sector can make in reducing energy consumption is recognized worldwide. The driving energy of \\{HVACs\\} depends on the thermal quality of the building envelope (TQBE) and outside temperature. Definitely, building regulations are changing with the time toward reduce the thermal loads of buildings. However, most of the existing residential buildings were built to lower TQBE. For instant, 72% of residential dwellings in the 15-EU were built before 1972. To investigate the impact of warming on driving energy of \\{HVACs\\} of a residential building a computer model was developed. Three climate categories/cities were considered, i.e. Stockholm (cold), Istanbul (mild), and Doha (hot). In each city, two buildings were modeled: one was assumed to be built according to the current local buildings regulations (standard TQBE), while the anther was built to lower TQBE. The simulations were run for present and future (in 2050) outdoor designing conditions. The calculations show that the impact of the warming on annual driving energy of \\{HVACs\\} (reduction or increase) depends very much on the climate category and on the TQBE. Based on the climate and TQBE, the change in annual \\{HVACs\\} energy varies from ?7.4% (in cold climate) to 12.7% (in hot climate). In mild climate, it was shown that the warming does not have significant impact on annual \\{HVACs\\} energy. Improving the TQBE can mitigate the impact of the warming.

Mohamad Kharseh; Lobna Altorkmany; Mohammed Al-Khawaj; Ferri Hassani

2014-01-01T23:59:59.000Z

155

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

156

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

157

HVAC Maintenance and Technologies  

Broader source: Energy.gov [DOE]

Presentation covers the HVAC maintenance and technologies, and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Providence, Rhode Island.

158

Columbia Water and Light - HVAC and Lighting Efficiency Rebates |  

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

Columbia Water and Light - HVAC and Lighting Efficiency Rebates Columbia Water and Light - HVAC and Lighting Efficiency Rebates Columbia Water and Light - HVAC and Lighting Efficiency Rebates < Back Eligibility Commercial Industrial Savings Category Heating & Cooling Commercial Heating & Cooling Cooling Heat Pumps Appliances & Electronics Commercial Lighting Lighting Maximum Rebate Lighting: 50% of invoiced cost up to $22,500 Program Info State Missouri Program Type Utility Rebate Program Rebate Amount HVAC Replacements: $570 - $3,770 Lighting: $300/kW reduction or half of project cost Provider Columbia Water and Light Columbia Water and Light (CWL) offers rebates to its commercial and industrial customers for the purchase of high efficiency HVAC installations and efficient lighting. Incentives for certain measures are based upon the

159

RoomZoner: Occupancy-based Room-Level Zoning of a Centralized HVAC System  

E-Print Network [OSTI]

RoomZoner: Occupancy-based Room-Level Zoning of a Centralized HVAC System Tamim Sookoor & Kamin. In this paper we present a CPS that enables a centralized Heating, Ventila- tion, and Air Conditioning (HVAC application due to residential HVAC systems ac- counting for over 15% of all U.S. energy usage, making it one

Whitehouse, Kamin

160

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

Note: This page contains sample records for the topic "hvac heating ventilating" 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

CALIFORNIA ENERGY Large HVAC Building  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Large HVAC Building Survey Information Database of Buildings over 100 Design of Large Commercial HVAC Systems research project, one of six research elements in the Integrated Design of Large Commercial HVAC Systems Integrated Design of Small Commercial HVAC Systems Integrated

162

Wavelet based artificial neural network applied for energy efficiency enhancement of decoupled HVAC system  

Science Journals Connector (OSTI)

Control methodologies could lower energy demand and consumption of heating, ventilating and air conditioning (HVAC) systems and, simultaneously, achieve better comfort conditions. However, the application of classical controllers is unsatisfactory as HVAC systems are non-linear and the control variables such as temperature and relative humidity (RH) inside the thermal zone are coupled. The objective of this study is to develop and simulate a wavelet-based artificial neural network (WNN) for self tuning of a proportional-derivative (PD) controller for a decoupled bi-linear HVAC system with variable air volume and variable water flow responsible for controlling temperature and RH of a thermal zone, where thermal comfort and energy consumption of the system are evaluated. To achieve the objective, a WNN is used in series with an infinite impulse response (IIR) filter for faster and more accurate identification of system dynamics, as needed for on-line use and off-line batch mode training. The WNN-IIR algorithm is used for self-tuning of two PD controllers for temperature and RH. The simulation results show that the WNN-IIR controller performance is superior, as compared with classical PD controller. The enhancement in efficiency of the HVAC system is accomplished due to substantially lower consumption of energy during the transient operation, when the gain coefficients of PD controllers are tuned in an adaptive manner, as the steady state setpoints for temperature and RH are better reached in a shorter period of time. The multi-zone analyses are suggested for future work.

G. Jahedi; M.M. Ardehali

2012-01-01T23:59:59.000Z

163

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

164

The Effect of Optimal Tuning of the Heating/Cooling Curve in AHU of HVAC System in Real Practice  

E-Print Network [OSTI]

too much energy is used but there are also more comfort- related complaints than expected. In order to optimise the energy consumption and to reduce the complaints there should be much more attention to the control strategy and the heating.../cooling curve. Paper 81, ICEBO 2004 TNO Bouw, The Netherlands Page: 3 of 12 Despite many years of optimisation of single components, such as condensing boilers, there is no common knowledge about how to design your control strategy or how to design...

2004-01-01T23:59:59.000Z

165

E-Print Network 3.0 - air conditioning hvac Sample Search Results  

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

systems play an important role in providing comfort in residential, commercial... of Heating, Refrigerating, and Air-Conditioning Engineers. Batterman S. and Burge H. 1995. "HVAC...

166

Columbia Water and Light- Residential HVAC Rebate Program  

Broader source: Energy.gov [DOE]

Columbia Water and Light (CWL) provides an HVAC incentive for residential customers that are replacing an older heating and cooling system. Customers should submit the mechanical permit from a...

167

HVAC Installed Performance  

Broader source: Energy.gov [DOE]

This presentation was given at the Summer 2012 DOE Building America meeting on July 25, 2012, and addressed the question HVAC proper installation energy savings: over-promising or under-delivering?"

168

2014-09-18 Issuance: Energy Conservation Standard for Alternative Efficiency Determination Methods, Basic Model Definition, and Compliance for Commercial HVAC, Refrigeration, and Water Heating Equipment; Supplemental Notice of Proposed Rulemaking  

Broader source: Energy.gov [DOE]

This document is a pre-publication Federal Register supplemental notice of proposed rulemaking regarding energy conservation standards for alternative efficiency determination methods, basic model definition, and compliance for commercial HVAC, Refrigeration, and Water Heating Equipment, as issued by the Deputy Assistant Secretary for Energy Efficiency on September 18, 2014. Though it is not intended or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

169

Energy efficient control of HVAC systems with ice cold thermal energy storage  

Science Journals Connector (OSTI)

Abstract In heating, ventilation and air conditioning (HVAC) systems of medium/high cooling capacity, energy demands can be matched with the help of thermal energy storage (TES) systems. If properly designed, TES systems can reduce energy costs and consumption, equipment size and pollutant emissions. In order to design efficient control strategies for TES systems, we present a model-based approach with the aim of increasing the performance of HVAC systems with ice cold thermal energy storage (CTES). A simulation environment based on Matlab/Simulink® is developed, where thermal behaviour of the plant is analysed by a lumped formulation of the conservation equations. In particular, the ice CTES is modelled as a hybrid system, where the water phase transitions (solid–melting–liquid and liquid–freezing–solid) are described by combining continuous and discrete dynamics, thus considering both latent and sensible heat. Standard control strategies are compared with a non-linear model predictive control (NLMPC) approach. In the simulation examples model predictive control proves to be the best control solution for the efficient management of ice CTES systems.

Alessandro Beghi; Luca Cecchinato; Mirco Rampazzo; Francesco Simmini

2014-01-01T23:59:59.000Z

170

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

171

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

172

Airflow regulation in variable-speed systems for residential HVAC applications  

SciTech Connect (OSTI)

In the majority of heating, ventilating, and air-conditioning (HVAC) systems, air is the final medium for adding or extracting heat from or to the space to be air conditioned. Air is heated by passing it over a heat transfer device called a coil, which is a heat exchanger with air on the outside and the primary heating/cooling medium (water, steam, electricity, refrigerant, etc.) on the inside. One of the major factors determining heat transfer is the airflow rate, which can be controlled by mechanical means or by controlling the speed of the fan. Centrifugal fans driven by single-speed induction motors traditionally have been used in the JVAC industry but have an airflow characteristic that depends on the static pressure seen by the system. Variable-speed systems are starting to emerge as a strong alternative to traditional systems because of their ability to match the demand of the air-conditioned space, resulting in higher efficiencies and higher comfort. System efficiency can be improved by constraining the range of airflows provided by the fan or blower system in response to system pressure, that is, by controlling the airflow over the heat exchanger. This paper presents a method to regulate airflow independent of the static pressure and without the need for airflow sensors.

Becerra, R.C.; Beifus, B.L. [General Electric Co., Fort Wayne, IN (United States)

1996-11-01T23:59:59.000Z

173

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

174

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

175

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

176

Development of New HVAC Design Tools: Search for the Holy Grail of  

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

Development of New HVAC Design Tools: Search for the Holy Grail of Development of New HVAC Design Tools: Search for the Holy Grail of Ventilation Research Speaker(s): Jelena Srebric Date: January 29, 2004 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: William Fisk HVAC systems are very important to our wellbeing, energy, and the environment. Current design tools are typically supported by basic knowledge, and keep us at arm's length from the many practical problems. The design paradigm has been shifted several times in the past from thermal comfort, energy conservation, health concerns, and now probably to security issues. Each of the shift has required better design tools of HVAC systems.A team led by Dr. Jelena Srebric at the Department of Architecture, the Penn State University (PSU) is developing new HVAC design tools to meet

177

HVAC | OpenEI  

Open Energy Info (EERE)

HVAC HVAC Dataset Summary Description The following data-set is for a benchmark residential home for all TMY3 locations across all utilities in the US. The data is indexed by utility service provider which is described by its "unique" EIA ID ( Source National Renewable Energy Laboratory Date Released April 05th, 2012 (2 years ago) Date Updated April 06th, 2012 (2 years ago) Keywords AC apartment CFL coffeemaker Computer cooling cost demand Dishwasher Dryer Furnace gas HVAC Incandescent Laptop load Microwave model NREL Residential television tmy3 URDB Data text/csv icon Residential Cost Data for Common Household Items (csv, 14.5 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Annually Time Period License License Open Data Commons Public Domain Dedication and Licence (PDDL)

178

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

179

Reliability and Functional Availability of HVAC Systems  

E-Print Network [OSTI]

This paper presents a model to calculate the reliability and availability of heating, ventilation and air conditioning systems. The reliability is expressed in the terms of reliability, maintainability and decision capability. These terms are a...

Myrefelt, S.

2004-01-01T23:59:59.000Z

180

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

Note: This page contains sample records for the topic "hvac heating ventilating" 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

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.

182

Neuro-optimal operation of a variable air volume HVAC&R system  

Science Journals Connector (OSTI)

Low operational efficiency especially under partial load conditions and poor control are some reasons for high energy consumption of heating, ventilation, air conditioning and refrigeration (HVAC&R) systems. To improve energy efficiency, HVAC&R systems should be efficiently operated to maintain a desired indoor environment under dynamic ambient and indoor conditions. This study proposes a neural network based optimal supervisory operation strategy to find the optimal set points for chilled water supply temperature, discharge air temperature and VAV system fan static pressure such that the indoor environment is maintained with the least chiller and fan energy consumption. To achieve this objective, a dynamic system model is developed first to simulate the system behavior under different control schemes and operating conditions. A multi-layer feed forward neural network is constructed and trained in unsupervised mode to minimize the cost function which is comprised of overall energy cost and penalty cost when one or more constraints are violated. After training, the network is implemented as a supervisory controller to compute the optimal settings for the system. Simulation results show that compared to the conventional night reset operation scheme, the optimal operation scheme saves around 10% energy under full load condition and 19% energy under partial load conditions.

Min Ning; M. Zaheeruddin

2010-01-01T23:59:59.000Z

183

An Application of State-Of-The-Art HVAC and Building Systems  

E-Print Network [OSTI]

AN APPLICATION OF STATE-OF-THE-ART HVAC AND BUILDING SYSTEMS DONALD P. FIORINO, M.S., P.E. Energy Conservation Manager Texas Instruments, Inc. Defense Systems and Electronics Group Dallas, Texas ABSTRACT This case study describes... the successful application of state-of-the-art HVAC and building systems at a large commercial office and industrial facility. The facility's exterior envelope systems, HVAC systems, lighting systems, energy conservation systems, exhaust/heat recovery...

Fiorino, D. P.

184

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage  

E-Print Network [OSTI]

1980, but its thermal solar and storage systems received achiller. A 30 m heat storage tank solar decouples heatfacility with thermal storage and solar- assisted HVAC for

Mammoli, Andrea

2014-01-01T23:59:59.000Z

185

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

186

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

187

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

188

CALIFORNIA ENERGY Large HVAC Energy Impact Report  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Large HVAC Energy Impact Report Statewide Energy Impact Report are part of the Integrated Design of Large Commercial HVAC Systems research project. The reports: Productivity and Interior Environments Integrated Design of Large Commercial HVAC Systems Integrated Design

189

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

190

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

191

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

192

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

193

Advanced HVAC Systems | Department of Energy  

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

HVAC Systems Advanced HVAC Systems Lead Performer: Oak Ridge National Laboratory - Oak Ridge, TN Partners: -- Indian Institute of Technology Bombay - Maharashtra, India -- Malviya...

194

Cooperative Control of Air Flow for HVAC Systems Shuai Liu1,2, Yushen Long1, Lihua Xie1 and Alexandre M. Bayen3  

E-Print Network [OSTI]

Cooperative Control of Air Flow for HVAC Systems Shuai Liu1,2, Yushen Long1, Lihua Xie1 for building heating, ven- tilation and air-conditioning (HVAC) systems. The strategy consists in two level and the HVAC system parameters. I. INTRODUCTION In recent years, energy saving and environment protection have

195

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

196

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

197

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

198

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-

199

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

200

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

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Life-Cycle Water Impacts of U.S. Transportation Fuels  

E-Print Network [OSTI]

Nuclear Power Plants Petroleum Refineries Chemical Plants Steel Mills Heating, Ventilation & Cooling (HVAC)

Scown, Corinne Donahue

2010-01-01T23:59:59.000Z

202

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

203

HVAC's Variable Refrigerant Flow (VRF) Technology  

E-Print Network [OSTI]

1 Comfort by Design Steve Jones Commercial Sales Manager for Mitsubishi Southwest Business Unit HVAC?s Variable Refrigerant Flow (VRF) Technology HVAC Industry Overview HVAC Market Dollar Volume $18 Billion Source:;NABH Research....2M Systems Ductless is a small percent of the U.S. HVAC market but current building and energy usage trends indicate a large growth opportunity Determining the Proper Application Worldwide Usage-Opportunity Window Unitary Chillers...

Jones, S.

2012-01-01T23:59:59.000Z

204

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

205

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

206

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

207

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

208

HVAC efficiency: Can filter selection reduce HVAC energy costs?  

Science Journals Connector (OSTI)

In a society becoming more aware of the effects of energy consumption, Zoe Grainge takes a look at whether filter efficiency can go some way to ease the energy burden of HVAC systems.

Zoe Grainge

2007-01-01T23:59:59.000Z

209

Building America Webinar: HVAC Right-Sizing Part 1—Calculating Loads  

Broader source: Energy.gov [DOE]

During this webinar, Building America Research Team IBACOS highlighted the key criteria required to create accurate heating and cooling load calculations. Current industry rules of thumb, perceptions and barriers to right-sizing HVAC were also discussed.

210

Computational Study on Thermal Properties of HVAC System with Building Structure Thermal Storage  

E-Print Network [OSTI]

Building structure thermal storage (BSTS) HVAC systems can store heat during nighttime thermal storage operation (nighttime operation hours) by using off-peak electricity and release it in the daytime air-conditioning operation (daytime operation...

Sato, Y.; Sagara, N.; Ryu, Y.; Maehara, K.; Nagai, T.

2007-01-01T23:59:59.000Z

211

Survival of bioaerosols in HVAC system photocatalytic filters  

Science Journals Connector (OSTI)

Abstract The survival of an experimental bioaerosol in photocatalytic and non-photocatalytic filters was investigated under UV-A or UV-C radiation exposure. To ensure the generation of reproducible bioaerosols in real operating conditions of Heating, Ventilation and Air Conditioning (HVAC) systems and their homogeneous coating on filters, a reactor with an optimal geometry was developed. The bacterial aerosol was generated from standardised bacterial suspensions and the Gram-negative bacterial model Escherichia coli was used as the experimental organism. The bioaerosol was characterised in terms of particle size distribution, reproducibility and stability over time. The coating of aerosolised cells on the filters was then studied. The total number of aerosolised E. coli cells was different from the amount of cultivable bacterial cells extracted from filters, probably resulting from the stress of the aerosolisation process. Damages to the outer membrane of E. coli cells were clearly observed through SEM and epifluorescent microscopy analysis. The influence of important physical parameters in the reactor-aerosolisation duration, frontal velocity and relative humidity- on the amount of aerosolised cells coated on filters were also investigated. Finally, the effects of UV-A or UV-C radiation were assessed on aerosolised microorganisms coated on HEPA photocatalytic filters and on photocatalytic or non-photocatalytic filters containing activated charcoal. The HEPA photocatalytic filters demonstrated a better disinfection efficiency with full damages of the aerosolised bacterial cells, probably resulting from an optimal contact between TiO2 coating and the microorganisms. In contrast, the use of filters with activated charcoal resulted in the apparition of an inactivation threshold that could be attributed to the penetration of aerosolised cells within the activated charcoal layer and the absence of contact with the photocatalyst. However, UV-C photocatalysis was able to inactivate faster and, at the same time, mineralise biological pollutants than UV-A.

S. Pigeot-Remy; J.C. Lazzaroni; F. Simonet; P. Petinga; C. Vallet; P. Petit; P.J. Vialle; C. Guillard

2014-01-01T23:59:59.000Z

212

Thermal model of solar absorption HVAC systems  

SciTech Connect (OSTI)

This paper presents a thermal model that describes the performance of solar absorption HVAC systems. The model considers the collector array, the building cooling and heating loads, the absorption chiller and the high temperature storage. Heat losses from the storage tank and piping are included in the model. All of the results presented in the paper are for an array of flat plate solar collectors with black chrome (selective surface) absorber plates. The collector efficiency equation is used to calculate the useful heat output from the array. The storage is modeled as a non-stratified tank with polyurethane foam insulation. The system is assumed to operate continuously providing air conditioning during the cooling season, space heating during the winter and hot water throughout the year. The amount of heat required to drive the chiller is determined from the coefficient of performance of the absorption cycle. Results are presented for a typical COP of 0.7. The cooling capacity of the chiller is a function of storage (generator) temperature. The nominal value is 190 F (88 C) and the range of values considered is 180 F (82 C) to 210 F (99 C). Typical building cooling and heating loads are determined as a function of ambient conditions. Performance results are presented for Sacramento, CA and Washington, D.C. The model described in the paper makes use of National Solar Radiation Data Base (NSRDB) data and results are presented for these two locations. The uncertainties in the NSRDB are estimated to be in a range of 6% to 9%. This is a significant improvement over previously available data. The model makes it possible to predict the performance of solar HVAC systems and calculate quantities such as solar fraction, storage temperature, heat losses and parasitic power for every hour of the period for which data are available.

Bergquam, J.B.; Brezner, J.M. [California State Univ., Sacramento, CA (United States). Dept. of Mechanical Engineering; [Bergquam Energy Systems, Sacramento, CA (United States)

1995-11-01T23:59:59.000Z

213

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

214

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.

215

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

216

SIMULATION OF RESIDENTIAL HVAC SYSTEM PERFORMANCE  

E-Print Network [OSTI]

1 LBNL-47622 SIMULATION OF RESIDENTIAL HVAC SYSTEM PERFORMANCE Walker, I., Siegel, J ..................................................... 9 #12;3 ABSTRACT In many parts of North America residential HVAC systems are installed outside of the simulations is that they are dynamic - which accounts for cyclic losses from the HVAC system and the effect

217

Energirigtige pumpekoblinger i HVAC-systemer  

E-Print Network [OSTI]

Energirigtige pumpekoblinger i HVAC-systemer PSO 2003 - FORSKNING & UDVIKLING I EFFEKTIV energieffektive HVAC-aggregater #12;InformationomProjektnr.:335-021 PROCESSEN: Projektet er gennemført af en reguleringsprincipper, mens Exhausto har leveret HVAC-aggregat og knowhow inden for klimasystemer. Grundfos

218

PROJECT REPORT HVAC EQUIPMENT DEMOGRAPHICS AND CAPACITY  

E-Print Network [OSTI]

PROJECT REPORT HVAC EQUIPMENT DEMOGRAPHICS AND CAPACITY ANALYSIS TOOLS APPLICABLE TO MULTI Commercial HVAC Design Process 12 5.0 Conclusion 18 6.0 References 19 TABLE OF CONTENTS SECTIONS #12;MULTI performance by collectively improving the enve- lope, lighting and HVAC systems. The primary goals of the UC

California at Davis, University of

219

CALIFORNIA ENERGY Small HVAC Database Of Monitored  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Small HVAC Database Of Monitored Information Database of Compiled of the Integrated Design of Small Commercial HVAC Systems research project. The reports are a result of funding: Productivity and Interior Environments Integrated Design of Large Commercial HVAC Systems Integrated Design

220

CALIFORNIA ENERGY Small HVAC Problems and Potential  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Small HVAC Problems and Potential Savings Reports Summary of Problems of the Integrated Design of Small Commercial HVAC Systems research project. The reports are a result of funding: Productivity and Interior Environments Integrated Design of Large Commercial HVAC Systems Integrated Design

Note: This page contains sample records for the topic "hvac heating ventilating" 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

CALIFORNIA ENERGY Small HVAC System Design Guide  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Small HVAC System Design Guide DESIGNGUIDELINES October 2003 500;#12;Small HVAC System Design Guide Acknowledgements i Acknowledgements The products and outcomes presented; Darren Goody, PECI, Design Guide review. #12;Small HVAC System Design Guide Preface ii Preface The Small

222

Development Practice in HVAC Controls  

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

Development Practice in HVAC Controls Development Practice in HVAC Controls Speaker(s): John Zhou Date: April 11, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Philip Haves The presentation will introduce development tools and design considerations used in HVAC controls development. Controls development use simulation, lab testing and field trial at different phases of the project cycle to improve control performance and to achieve rapid development. Development starts with simulation to originate and define algorithm concept. The concept is then implemented in a prototype controller, and tested in lab environment. The concept is refined and verified by analyzing lab results. In the final phase of development, controllers with refined and verified algorithms are installed in field trial sites to ensure system integration and to confirm

223

HVAC EFFICIENCY BUSINESS CASE DEMAND CONTROL KITCHEN VENTILATION  

E-Print Network [OSTI]

and natural gas, total annual savings can be estimated. This can then be coupled with the expected system cost factor with respect to air flow. This means that even a relatively modest reduction in air flow can fans through variable frequency drives (VFDs) based on input signals from temperature probes placed

California at Davis, University of

224

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

225

Ozone removal by HVAC filters  

Science Journals Connector (OSTI)

Residential and commercial HVAC filters that have been loaded with particles during operation in the field can remove ozone from intake or recirculated air. However, knowledge of the relative importance of HVAC filters as a removal mechanism for ozone in residential and commercial buildings is incomplete. We measured the ozone removal efficiencies of clean (unused) fiberglass, clean synthetic filters, and field-loaded residential and commercial filters in a controlled laboratory setting. For most filters, the ozone removal efficiency declined rapidly but converged to a non-zero (steady-state) value. This steady-state ozone removal efficiency varied from 0% to 9% for clean filters. The mean steady-state ozone removal efficiencies for loaded residential and commercial filters were 10% and 41%, respectively. Repeated exposure of filters to ozone following a 24-h period of no exposure led to a regeneration of ozone removal efficiency. Based on a theoretical scaling analysis of mechanisms that are involved in the ozone removal process, we speculate that the steady-state ozone removal efficiency is limited by reactant diffusion out of particles, and that regeneration is due to internal diffusion of reactive species to sites available to ozone for reaction. Finally, by applying our results to a screening model for typical residential and commercial buildings, HVAC filters were estimated to contribute 22% and 95%, respectively, of total ozone removal in HVAC systems.

P. Zhao; J.A. Siegel; R.L. Corsi

2007-01-01T23:59:59.000Z

226

Software tools for HVAC research  

Science Journals Connector (OSTI)

Energy saving methods can be employed to reduce energy consumption in buildings, or improve indoor thermal conditions. An example of those methods is the use of permeable coverings, but there are other important parameters like thermal inertia. To understand ... Keywords: Building, Computer, Design, Energy saving, HVAC, Software tools

José A. Orosa; Armando C. Oliveira

2011-10-01T23:59:59.000Z

227

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

228

Free-cooling: A total HVAC design concept  

SciTech Connect (OSTI)

This paper discusses a total ''free cooling'' HVAC design concept in which mechanical refrigeration is practically obviated via the refined application of existing technological strategies and a new diffuser terminal. The principles being applied are as follows; Thermal Swing: This is the active contribution of programmed heat storage to overall HVAC system performance. Reverse Diffuser: This is a new air terminal design that facilitates manifesting the thermal storage gains. Developing the thermal storage equation system into a generalized simulation model, optimizing the thermal storage and operating strategies with a computer program and developing related algorithms are subsequently illustrated. Luminair Aspiration: This feature provides for exhausting all luminair heat totally out of the building envelope, via an exhaust duct system and insulated boots. Two/Three-Stage Evaporative Cooling: This concept comprises a system of air conditioning that entails a combination of closed and open loop evaporative cooling with standby refrigeration only.

Janeke, C.E.

1982-01-01T23:59:59.000Z

229

STATE OF CALIFORNIA CERTIFICATE OF COMPLIANCE, PRESCRIPTIVE HVAC ALTERATIONS  

E-Print Network [OSTI]

STATE OF CALIFORNIA CERTIFICATE OF COMPLIANCE, PRESCRIPTIVE HVAC ALTERATIONS CEC-MECH-1C-ALT-HVAC (Revised 07/10) CALIFORNIA ENERGY COMMISSION CERTIFICATE OF COMPLIANCE MECH-1C-ALT-HVAC Prescriptive HVAC Steps" column below. Note: After installation of HVAC units and/or ducts, the Installation

230

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage  

E-Print Network [OSTI]

performance of a solar-thermal- assisted hvac system. Energyfor rows of fixed solar thermal collectors using flatassisted by a 232 m solar thermal array providing heat to a

Mammoli, Andrea

2014-01-01T23:59:59.000Z

231

Unusual HVAC challenges require innovative solutions  

SciTech Connect (OSTI)

There were many reasons behind Motorola`s decision to build the first 225,000 sq ft of a planned one million sq ft manufacturing facility in Chihuahua, Mexico. Among these were the availability of skilled labor in the area, lower construction costs, some export tax advantages, and the close proximity to the US border. The new facility is made up of a variety of functional areas that together create an impressively efficient plant. Phase 1 construction included a large manufacturing floor, shipping and receiving areas, a bulk storage facility, and a large office area with a view of the factory floor. The structure also houses a retail store where Motorola consumer products are sold, a conference and banquet center, a commercial kitchen, and dining facilities for 750. The design cooling load is 750 tons; the heating load is 4.5 million Btuh. The paper discusses the challenging location, the HVAC system, and the future expansion planned.

Jardine, G.M.; Gwin, O.D. [Heery International, Inc., Atlanta, GA (United States)

1998-02-01T23:59:59.000Z

232

Can ASHRAE Standard 62-1989 Requirements be Satisfied while Maintaining Moisture Control using Stock HVAC Equipment in Hot, Humid Climates?  

E-Print Network [OSTI]

increase latent loads more than sensible loads, requiring lower sensible heat ratios. Stock HVAC package units and split systems are not available with the requisite sensible heat ratios, and cannot maintain moisture control in small commercial buildings...

Turner, S. C.

1996-01-01T23:59:59.000Z

233

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

234

Energy Department Announces Funding to Develop Improved Next Generation HVAC Systems  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department today announced nearly $8 million to support research and development of the next generation of heating, ventilating, and air conditioning technologies.

235

Impacts of increased outdoor air flow rates on annual HVAC energy costs in office environment.  

E-Print Network [OSTI]

??The use of different ventilation systems has an important impact on the energy cost of office buildings. This paper examines the relationship between heating and… (more)

Destrez, Adrien

2011-01-01T23:59:59.000Z

236

HVAC Technician | Princeton Plasma Physics Lab  

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

HVAC Technician HVAC Technician Department: Facilities Supervisor(s): Tom Ward Staff: L&S 07 Requisition Number: 1300884 Under the supervision of the General Lead Technician and Lead HVAC Technician, the incumbent will be responsible for the installation, preventative maintenance, troubleshooting and repair of various HVAC and refrigeration equipment; local HVAC control systems and ancillary support equipment; and will work with other groups within the Division and throughout the Laboratory to ensure long-term, safe and efficient operation of HVAC and refrigeration systems. All tasks must be completed in a timely, cost efficient manner, support on-going sustainability initiatives and energy efficiency programs at the Laboratory. The incumbent is expected to utilize thorough theoretical knowledge and techniques to accomplish

237

HVAC Commissioning - A Status Report in Taiwan  

E-Print Network [OSTI]

HVAC HVAC CommisioningCommisioning ?? A Status Report in TaiwanA Status Report in Taiwan Dr. K.H. YangDr. K.H. Yang Fellow ASHRAEFellow ASHRAEProfessor, National Sun Professor, National Sun Yat... ,decided to conduct an overall renovation program for the HVAC systems of existing governmental buildings where it is mandatory to adapt BEMS and conducting system commissioning .?This program not only constructs an important step in responding...

Yang, K. H.

2006-01-01T23:59:59.000Z

238

Measuring Advances in HVAC Distribution System Design  

E-Print Network [OSTI]

Advances in HV AC Distribution System Design Ellen FranconiAdvances in HVAC Distribution System Design Ellen Franconisavings result from distribution system design improvements,

Franconi, E.

2011-01-01T23:59:59.000Z

239

DOE Convening Report on Certification of Commercial HVAC and...  

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

Convening Report on Certification of Commercial HVAC and CRE Products DOE Convening Report on Certification of Commercial HVAC and CRE Products This document is the convening...

240

Project examples Install new HVAC, electrical, fire protection,  

E-Print Network [OSTI]

Project examples Install new HVAC, electrical, fire protection, and plumbing systems in Mechanical. · Totransformthisspaceandincreaseaccessibility, anelevatorisrequired.Currently,Blakelydoesnot haveone. Replace HVAC and electrical system

Blanchette, Robert A.

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Solid State Vehicular Generators and HVAC Development | Department...  

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

Solid State Vehicular Generators and HVAC Development Solid State Vehicular Generators and HVAC Development 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit...

242

Chapter 5: Lighting, HVAC, and Plumbing | Department of Energy  

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

5: Lighting, HVAC, and Plumbing Chapter 5: Lighting, HVAC, and Plumbing Chapter 5 of the LANL Sustainable Design Guide with guidelines for developing sustainable, healthy,...

243

Integration of HVAC System Design with Simplified Duct Distribution...  

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

Integration of HVAC System Design with Simplified Duct Distribution - Building America Top Innovation Integration of HVAC System Design with Simplified Duct Distribution - Building...

244

Energy Savings Potential and RD&D Opportunities for Residential...  

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

Building HVAC Systems This report assesses 135 different heating, ventilation, and air-conditioning (HVAC) technologies for U.S. residential buildings to identify and...

245

Building America Best Practices Series Vol. 14: Energy Renovations...  

Energy Savers [EERE]

comfort, health, and safety of their homes by upgrading their heating, ventilation, and air conditioning (HVAC) equipment. Energy Renovations: HVAC More Documents & Publications...

246

Energy Savings Potential and RD&D Opportunities for Commercial...  

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

for Commercial Building HVAC This report assesses 182 different heating, ventilation, and air-conditioning (HVAC) technologies for U.S. commercial buildings to identify and provide...

247

NREL: Transportation Research - Data, Models, and Tools  

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

fuel providers, and other transportation decision-makers reduce petroleum use. CoolSim HVAC Model Heating, ventilating, and air conditioning (HVAC) model that solves energy,...

248

Building America Case Study: Evaluation of the Performance of...  

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

system that can measure the interior and heating, ventilation, and air conditioning (HVAC) system condi- tions and the energy use of most major appliances and HVAC systems. The...

249

Particle deposition in ventilation ducts  

E-Print Network [OSTI]

Nuclear Regulatory Commission. ASHRAE (1989a) ASHRAE Guideline 1-1989, Guideline for commissioning of HVAC

Sippola, Mark R.

2002-01-01T23:59:59.000Z

250

Utveckling av provmetodik för HVAC på lastbil; Development of test methodology for climatic testing of truck HVAC on trucks.  

E-Print Network [OSTI]

?? I detta examensarbetet undersöks hur provningen av HVAC på lastbilar skall utföras i klimatvindtunneln CD7 som Scania färdigställer till år 2013. HVAC omfattar kupéuppvärmning,… (more)

Jonsson, Björn-Emil

2011-01-01T23:59:59.000Z

251

HVAC, Water Heating, and Appliance Publications | Department...  

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

to identify opportunities to reduce the energy consumption of electric motor-driven systems in the residential and commercial sectors through the use of advanced motor...

252

Optimization Control Strategies for HVAC Terminal Boxes  

E-Print Network [OSTI]

The HVAC terminal boxes are one of the major building HVAC components. They directly impact the building room comfort conditions and the energy costs. How to operate the box in a highly energy efficient way and maintain the room comfort level...

Zhu, Y.; Batten, T.; Noboa, H.; Claridge, D. E.; Turner, W. D.; Liu, M.; Zhou, J.; Cameron, C.; Keeble, D.; Hirchak, R.

2000-01-01T23:59:59.000Z

253

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

254

2013 Energy Code Changes That Effect the HVAC  

E-Print Network [OSTI]

2013 Energy Code Changes That Effect the HVAC Industry Tav Commins Mechanical Engineer California Energy Commission #12;HVAC Mandatory Measures For All Newly Installed Residential HVAC Systems (New Watt Draw at .58 W/CFM, or (return duct and filter sizing) MERV 6 Filter #12;Residential HVAC Measures

California at Davis, University of

255

CALIFORNIA ENERGY Large HVAC Field and Baseline Data  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Large HVAC Field and Baseline Data Field Data Collection: Site Survey of the Integrated Design of Large Commercial HVAC Systems research project. The reports are a result of funding Design of Large Commercial HVAC Systems Integrated Design of Small Commercial HVAC Systems Integrated

256

Residential HVAC Indoor Air Quality(ASHRAE 62.2)  

E-Print Network [OSTI]

Residential HVAC && Indoor Air Quality(ASHRAE 62.2) Tav Commins #12;Contact Information · Energy construction, Additions /Alterations · Nonresidential and Residential #12;Residential HVAC && Indoor Air Quality(ASHRAE 62.2) ·HVAC EfficiencyHVAC Efficiency ·Quality Installation (HERS Measures) S li b HERS R t

257

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 --

258

Salsbury and Diamond: Automated Testing of HVAC Systems for Commissioning -1 -Automated Testing of HVAC Systems for Commissioning  

E-Print Network [OSTI]

and Diamond: Automated Testing of HVAC Systems for Commissioning - 1 - Automated Testing of HVAC Systems This paper describes an approach to the automation of the commissioning of HVAC systems. The approach of many HVAC systems is limited more by poor installation, commissioning, and maintenance than by poor

259

Investigation of IAQ-Relevant Surface Chemistry and Emissions on HVAC Filter Materials  

E-Print Network [OSTI]

VOCs emitted by reactions of HVAC filters with ozone usingand Emissions on HVAC Filter Materials Hugo Destaillats andChemistry and Emissions on HVAC Filter Materials Authors:

Destaillats, Hugo

2010-01-01T23:59:59.000Z

260

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...

Note: This page contains sample records for the topic "hvac heating ventilating" 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

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

262

Utveckling av provmetodik för HVAC på lastbil; Development of test methodology for truck HVAC.  

E-Print Network [OSTI]

?? The issue about how Scania shall perform HVAC tests in the climatic wind tunnel CD7, which Scania is about to complete by year 2013,… (more)

Tedenäs, Jimmy

2011-01-01T23:59:59.000Z

263

Better Buildings Neighborhood Program Business Models Guide: Contractor/Retailer Business Models  

Broader source: Energy.gov [DOE]

Business models information focused on remodelers, HVAC (heating, ventilation, and air conditioning) contractors, home performance contractors, or retailers.

264

Microsoft PowerPoint - Public Workshop - FY12 Budget Briefing...  

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

ready * Vital safety systems removed- heating, ventilation, and air conditioning (HVAC), fire protection, criticality * Contaminated ducts and filter boxes removed *...

265

Microsoft Word - BMPPlan Botts  

National Nuclear Security Administration (NNSA)

-- gallon per minute GSA -- General Services Administration HVAC -- Heating Ventilation Air Conditioning ISO -- International Standards Organization IWPF -- Industrial Wastewater...

266

BS-8: HVAC Modeling and Simulation  

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

BS-8: HVAC Modeling and Simulation BS-8: HVAC Modeling and Simulation Speaker(s): Darko Sucic Date: December 5, 2001 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Satkartar K. Kinney Industry Foundation Classes (IFC), an object data model of buildings, are being developed by the International Alliance for Interoperability (IAI) to support data sharing and exchange in the building and construction industry. The IAI, founded in 1995, has published four releases of IFC so far. Several prototype implementations by leading software companies show that commercial IFC software is beginning to meet end user expectations of interoperability in the industry. BS-8 is an LBNL project that started last summer. It is developing the IFC HVAC extension schemata that will extend the IFC object data model and support the exchange of HVAC information

267

Interdisciplinary Innovation and Vision in the HVAC  

E-Print Network [OSTI]

potentials for optimizing costs can be found in the HVAC systems when calculated over the total Life-Cycle-Cost (LCC) of a building incorporating planning through to facility management. This requires an accurate plan specifying an efficient technical...

Hecker, T.

2008-01-01T23:59:59.000Z

268

HVAC Energy Recovery Design and Economic Evaluation  

E-Print Network [OSTI]

ENRECO has prepared this paper on HVAC energy recovery to provide the engineer with an overview of the design engineering as well as the economic analysis considerations necessary to evaluate the potential benefits of energy recovery....

Kinnier, R. J.

1979-01-01T23:59:59.000Z

269

A PDI for your HVAC System  

Broader source: Energy.gov [DOE]

This presentation was given at the Summer 2012 DOE Building America meeting on July 25, 2012, and addressed the question "HVAC proper installation energy savings: over-promising or under-deliverying?"

270

Modeling and optimization of building HVAC systems.  

E-Print Network [OSTI]

??This thesis presents the development of hybrid modeling methodologies for HVAC component static/steady-state models and dynamic/transient models, and the development and implementation of a model-based… (more)

Jin, Guang Yu.

2012-01-01T23:59:59.000Z

271

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.

272

Critical Question #4: What are the Best Off-the-Shelf HVAC Solutions for  

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

Critical Question #4: What are the Best Off-the-Shelf HVAC Critical Question #4: What are the Best Off-the-Shelf HVAC Solutions for Low-Load, High-Performance Homes and Apartments? Critical Question #4: What are the Best Off-the-Shelf HVAC Solutions for Low-Load, High-Performance Homes and Apartments? What is currently in the market? What are the limitations of these systems? What are the desired specifications for these systems? What are the realistic space conditioning loads of these high-performance homes and apartments? cq4_forced_air_systems_walker.pdf cq4_simplified_space_cond_prahl.pdf cq4_ground_heat_exchanger_im.pdf More Documents & Publications Track C - Market-Driven Research Solutions Track B - Critical Guidance for Peak Performance Homes Energy Storage & Power Electronics 2008 Peer Review - Power Electronics

273

HVAC vs. Space Heaters: Which is More Efficient? | Department of Energy  

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

HVAC vs. Space Heaters: Which is More Efficient? HVAC vs. Space Heaters: Which is More Efficient? HVAC vs. Space Heaters: Which is More Efficient? January 10, 2011 - 4:27pm Addthis Andrea Spikes Communicator at DOE's National Renewable Energy Laboratory I live in Colorado, and when it's cold it is very, very cold. Since I hate paying high heating bills, I typically have my thermostat set to a chilly 62°F. My husband and I have gotten used to this, and really like being able to use a warm comforter while the air stays cooler. There are some nights, however, that even this setting seems too high and the heater is running a lot more than I'd like it to. When it's below 0° overnight, or even sometimes during the day, we occasionally break out our oil-filled space heater when we're only using one room. That has me

274

HVAC vs. Space Heaters: Which is More Efficient? | Department of Energy  

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

HVAC vs. Space Heaters: Which is More Efficient? HVAC vs. Space Heaters: Which is More Efficient? HVAC vs. Space Heaters: Which is More Efficient? January 10, 2011 - 4:27pm Addthis Andrea Spikes Communicator at DOE's National Renewable Energy Laboratory I live in Colorado, and when it's cold it is very, very cold. Since I hate paying high heating bills, I typically have my thermostat set to a chilly 62°F. My husband and I have gotten used to this, and really like being able to use a warm comforter while the air stays cooler. There are some nights, however, that even this setting seems too high and the heater is running a lot more than I'd like it to. When it's below 0° overnight, or even sometimes during the day, we occasionally break out our oil-filled space heater when we're only using one room. That has me

275

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

276

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

277

Overview of Fords Thermoelectric Programs: Waste Heat Recovery...  

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

Overview of progress in TE waste heat recovery from sedan gasoline-engine exhaust, TE HVAC system in hybrid sedan, and establishing targets for cost, power density, packaging,...

278

Modeling and optimization of HVAC energy consumption  

Science Journals Connector (OSTI)

A data-driven approach for minimization of the energy to air condition a typical office-type facility is presented. Eight data-mining algorithms are applied to model the nonlinear relationship among energy consumption, control settings (supply air temperature and supply air static pressure), and a set of uncontrollable parameters. The multiple-linear perceptron (MLP) ensemble outperforms other models tested in this research, and therefore it is selected to model a chiller, a pump, a fan, and a reheat device. These four models are integrated into an energy optimization model with two decision variables, the setpoint of the supply air temperature and the static pressure in the air handling unit. The model is solved with a particle swarm optimization algorithm. The optimization results have demonstrated the total energy consumed by the heating, ventilation, and air-conditioning system is reduced by over 7%.

Andrew Kusiak; Mingyang Li; Fan Tang

2010-01-01T23:59:59.000Z

279

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

280

Building Technologies Office: HVAC and Water Heater Field Tests Research  

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

HVAC and Water Heater HVAC and Water Heater Field Tests Research Project to someone by E-mail Share Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Facebook Tweet about Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Twitter Bookmark Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Google Bookmark Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Delicious Rank Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Digg Find More places to share Building Technologies Office: HVAC and Water Heater Field Tests Research Project on AddThis.com... About Take Action to Save Energy Partner with DOE Activities Appliances Research

Note: This page contains sample records for the topic "hvac heating ventilating" 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

System Optimization - The Global Approach to HVAC Control  

E-Print Network [OSTI]

System Optimization is a new approach to HVAC control as implemented by Energy Management Control Systems. System Optimization is defined as electronic building control strategies which treat a building's HVAC components as a complete energy...

Thielman, D. E.

1984-01-01T23:59:59.000Z

282

Indoor Chemistry: Materials, Ventilation Systems, and Occupant Activities  

E-Print Network [OSTI]

Ozone removal by HVAC filters. Almas. Env. in review, [23]quality [14], and loaded HVAC filters have been linked toparticles captured on HVAC filters. The total surface area

Morrison, G.C.

2011-01-01T23:59:59.000Z

283

Are Ventilation Filters Degrading Indoor Air Quality in California Classrooms?  

E-Print Network [OSTI]

2007) “Ozone Removal by HVAC Filters. ” Atmos.  Environ.  HVAC filters  ozone deposition in  HVAC filters and byproduct formation, 

Fisk, Michael G. Apte and William J.

2009-01-01T23:59:59.000Z

284

Effect of Ventilation Strategies on Residential Ozone Levels  

E-Print Network [OSTI]

provided  by  HVAC  system  filters,  it  was  assumed  filtration  from  the  HVAC  system  filters  brings  down  HVAC  system  air  leakage   and  ozone  deposition  on  HAVC  system  filters.      

Walker, Iain S.

2014-01-01T23:59:59.000Z

285

Automotive Thermoelectric Generators and HVAC  

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

1) Compression (1 2) Combustion (2 3) Expansion (3 4) Exhaust (1 5) Heat loss to radiator: 30% of fuel energy lost ( 70% is used) waste heat T H T catlytic...

286

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

287

Atmospheric Environment 41 (2007) 31513160 Ozone removal by HVAC filters  

E-Print Network [OSTI]

Atmospheric Environment 41 (2007) 3151­3160 Ozone removal by HVAC filters P. Zhao, J.A. Siegel�, R May 2006; accepted 14 June 2006 Abstract Residential and commercial HVAC filters that have been loaded of the relative importance of HVAC filters as a removal mechanism for ozone in residential and commercial

Siegel, Jeffrey

288

MATERIALS AND INFORMATION FLOWS FOR HVAC DUCTWORK FABRICATION AND SITE  

E-Print Network [OSTI]

MATERIALS AND INFORMATION FLOWS FOR HVAC DUCTWORK FABRICATION AND SITE INSTALLATION Matt Holzemer,1, and air-conditioning (HVAC) systems requires a set of complex activities and handoffs between multiple architecture-, engineering-, and construction practitioners. This paper highlights one part of the HVAC

Tommelein, Iris D.

289

ThermoSense: Occupancy Thermal Based Sensing for HVAC Control  

E-Print Network [OSTI]

ThermoSense: Occupancy Thermal Based Sensing for HVAC Control Alex Beltran Elect. Eng. & Comp Occupancy Sensing, Thermal Sensing, HVAC Control 1. INTRODUCTION From 1980 to 2010, energy in the United, November 13-14 2013, Rome, Italy. Copyright 2013 ACM 978-1-4503-2431-1/13/11 ...$15.00. (HVAC) consumed 42

Cerpa, Alberto E.

290

Modeling Building Thermal Response to HVAC Zoning Virginia Smith  

E-Print Network [OSTI]

Modeling Building Thermal Response to HVAC Zoning Virginia Smith Department of Computer Science HVAC systems account for 38% of building energy usage. Studies have indicated at least 5-15% waste due to unoccu- pied spaces being conditioned. Our goal is to minimize this waste by retrofitting HVAC systems

Whitehouse, Kamin

291

SMUD's HVAC Programs Ravi Patel-Program Planning  

E-Print Network [OSTI]

1 SMUD's HVAC Programs 5-7-13 Ravi Patel- Program Planning Bruce Baccei- R&D #12;SMUD's Residential contractors trained and BPI certified ­ Majority were pushing only HVAC; now driving the HPP · Program encourages more HVAC replacements to occur through HPP ­ Move away from stand alone programs ­ Start

California at Davis, University of

292

Lessons Learned During HVAC Installation Dept. of Computer Science  

E-Print Network [OSTI]

Lessons Learned During HVAC Installation Ian Watson AI-CBR Dept. of Computer Science University of HVAC equipment. It has been developed as an adjunct to an existing system that uses case-based reasoning to reuse previous HVAC installation specifications and designs. The system described lets

Watson, Ian

293

An update on acoustics designs for HVAC (Engineering) K. Marriott  

E-Print Network [OSTI]

An update on acoustics designs for HVAC (Engineering) K. Marriott IOA, 29a Ashburton Road, Croydon and Air Conditioning (HVAC) engineer is to engineer ways for keeping these factors under control the HVAC engineer's environmental requirements while minimizing noise generated in the process considering

Paris-Sud XI, Université de

294

Modeling and simulation of HVAC Results in EnergyPlus  

E-Print Network [OSTI]

LBNL-5564E Modeling and simulation of HVAC Results in EnergyPlus Mangesh Basarkar, Xiufeng Pang;MODELING AND SIMULATION OF HVAC FAULTS IN ENERGYPLUS Mangesh Basarkar, Xiufeng Pang, Liping Wang, Philip not capture the significant impact of installation, operational and degradation HVAC system faults on actual

295

Continued on next page A letter explaining the 2005 HVAC  

E-Print Network [OSTI]

Continued on next page A letter explaining the 2005 HVAC Change-out to consumers is available this bulletin, or downloaded from the 2005 HVAC Change out Information website at: www.energy.ca.gov/title24 duct sealing requirements for HVAC change-outs in existing homes become effective October 1, 2005

296

Tematiche di ricerca Controllo di sistemi HVAC&R  

E-Print Network [OSTI]

Tematiche di ricerca Controllo di sistemi HVAC&R Controllo di processo per l'industria dei;Tematiche di ricerca Controllo di sistemi HVAC&R Controllo di processo per l'industria dei semiconduttori controllo di sistemi HVAC&R 2 Controllo di processo per l'industria dei semiconduttori 3 Problemi di

Schenato, Luca

297

Long Range Passive UHF RFID System Using HVAC Ducts  

E-Print Network [OSTI]

INVITED P A P E R Long Range Passive UHF RFID System Using HVAC Ducts To provide a potential communications channel, HVAC ducts can function as electromagnetic waveguides; a 30-m read range has been-conditioning (HVAC) ducts as a potential communication channel between passive ultrahigh-frequency (UHF) radio

Hochberg, Michael

298

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

299

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

300

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

Note: This page contains sample records for the topic "hvac heating ventilating" 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

A PDI for your HVAC System  

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

8/3/2012 Technical Approach Develop a PDI for HVAC PDI focus is on Inspecting Installation - a $10 Chinese sweatshop t-shirt gets a QA/QC sticker, why not a $10k HVAC system? Develop & require diagnostics that confirm good installations: - Air flow, duct leakage, refrigerant charge, delivered temperatures, system pressures, filter requirements, fan power, noise - On board diagnostics (OBD) for flow, pressures, fan power, charge Make it a warranty requirement, code requirement, permit requirement, etc. Recommended Guidance Develop the PDI checklist and label (include target and system test results) - External Tests: duct leaks - Internal Tests: OBD for system pressures, air flow, charge, fan power - Labels: Certify tight equipment

302

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

303

University of North Carolina at Charlotte Design and Construction Manual Section 2, Division 23 HVAC  

E-Print Network [OSTI]

­ HVAC SECTION 2 DIVISION 23 HVAC #12;University of North Carolina at Charlotte Design and Construction Manual Section 2, Division 23 ­ HVAC DIVISION 23 - HVAC Note: This is a guide for Designers only 23 0510 - MECHANICAL GENERAL - HVAC PART 1 - GENERAL 1.1 MECHANICAL DESIGNER: A. Design

Xie,Jiang (Linda)

304

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

305

Energy Master Plans for Sustainable, High Performance HVAC and Associated Systems for Hot and Humid Climates  

E-Print Network [OSTI]

; Equal pressure ducting systems; Modular heating and cooling generation, small zone control. 4.Complexity: If you cannot understand the system without explanation, it is too complex. If you need to read a sequence of operation more than once... by over 75%. It is the HVAC system selection and in particular the distribution systems that require to be carefully selected and designed to achieve long-term minimum electrical use. Electrical refrigeration uses only 25% of the electricity...

Maisey, G. E.; Milestone, B.

2004-01-01T23:59:59.000Z

306

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

307

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

308

Laboratory measurement of secondary pollutant yields from ozone reaction with HVAC filters.  

E-Print Network [OSTI]

Ozone Reaction with HVAC Filters Hugo Destaillats, WenhaoOzone Reaction with HVAC Filters Hugo Destaillats 1,3,* ,Ozone Reaction with HVAC Filters Hugo Destaillats 1,3,* ,

Destaillats, Hugo

2012-01-01T23:59:59.000Z

309

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

310

Pitfalls in Building and HVAC Systems  

E-Print Network [OSTI]

the summer savings. ? Consider all forms of savings, not just en ergy. Opportunities are often missed be cause only energy savings are consideted. For example, the installation of extetior wall insulation or aluminum thermopane win dows result in a...PITFALLS IN BUILDING AND HVAC SYSTEMS B. N. Gidwani, P.E. Roy F. Weston, Inc. West Chester, Pennsylvania ABSTRACT The purpose of an energy audit is to identify and analyze areas of energy consumption and to pro pose methods of conservation...

Gidwani, B. N.

311

Fabrication of A Quantum Well Based System for Truck HVAC  

Broader source: Energy.gov [DOE]

Discusses performance differences between conventional modules and quantum well modules and details a conventional HZ-14 device, using bulk bismuth-telluride advantageous for truck HVAC applications.

312

Fault Detection and Diagnosis in Building HVAC Systems.  

E-Print Network [OSTI]

??Building HVAC systems account for more than 30% of annual energy consumption in United States. However, it has become apparent that only in a small… (more)

Najafi, Massieh

2010-01-01T23:59:59.000Z

313

Comparison of Building Energy Modeling Programs: HVAC Systems  

E-Print Network [OSTI]

or FAU with no control), supply water temperature, pressureunder the same control The supply air temperature and supplyHVAC control strategies of supply air temperature, supply

Zhou, Xin

2014-01-01T23:59:59.000Z

314

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.

315

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

316

Improving the Efficiency of Light-Duty Vehicle HVAC Systems using...  

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

Light-Duty Vehicle HVAC Systems using Zonal Thermoelectric Devices and Comfort Modeling Improving the Efficiency of Light-Duty Vehicle HVAC Systems using Zonal Thermoelectric...

317

A Scenario-based Predictive Control Approach to Building HVAC Management Systems  

E-Print Network [OSTI]

A Scenario-based Predictive Control Approach to Building HVAC Management Systems Alessandra Parisio and Air Conditioning (HVAC) systems while minimizing the overall energy use. The strategy uses

Johansson, Karl Henrik

318

SIMULATION AND EXPERIMENTAL VALIDATION OF AIRBORNE AND STRUCTURE-BORNE NOISE TRANSMISSION IN HVAC PLENUMS.  

E-Print Network [OSTI]

??This research demonstrates the usage of numerical acoustics to model sound and vibrational energy propagation in HVAC ducts and plenums. Noise and vibration in HVAC… (more)

Ramalingam, Srinivasan

2012-01-01T23:59:59.000Z

319

Characterization of HVAC operation uncertainty in EnergyPlus AHU modules.  

E-Print Network [OSTI]

??This study addresses 5 uncertainties that exist in the operation of HVAC systems, which will presumably affect the actual energy consumption of the HVAC system… (more)

Sui, Di

2014-01-01T23:59:59.000Z

320

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:

Note: This page contains sample records for the topic "hvac heating ventilating" 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

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

322

Variation in indoor particle number and PM2.5 concentrations in a radio station surrounded by busy roads before and after an upgrade of the HVAC system  

Science Journals Connector (OSTI)

Indoor particle number and PM2.5 concentrations were investigated in a radio station surrounded by busy roads. Two extensive field measurement campaigns were conducted to determine the critical parameters affecting indoor air quality. The results indicated that indoor particle number and PM2.5 concentrations were governed by outdoor air, and were significantly affected by the location of air intake and design of HVAC system. Prior to the upgrade of the HVAC system and relocation of the air intake, the indoor median particle number concentration was 7.4×103 particles/cm3 and the median PM2.5 concentration was 7 ?g/m3. After the relocation of air intake and the redesign of the HVAC system, the indoor particle number concentration was between 2.3×103 and 3.4×103 particles/cm3, with a median value of 2.7×103 particles/cm3, and the indoor PM2.5 concentration was in the range of 3–5 ?g/m3, with a median value of 4 ?g/m3. By relocating the air intake of the HVAC, the outdoor particle number and PM2.5 concentrations near the air intake were reduced by 35% and 55%, respectively. In addition, with the relocation of air intake and the redesign of the HVAC system, the particle number penetration rate was reduced from 42% to 14%, and the overall filtration efficiency of the HVAC system (relocation of air intake, pre-filter, AHU and particle losses in the air duct) increased from 58% to 86%. For PM2.5, the penetration rate after the upgrade was approximately 18% and the overall filtration efficiency was 82%. This study demonstrates that by using a comprehensive approach, including the assessment of outdoor conditions and characterisation of ventilation and filtration parameters, satisfactory indoor air quality can be achieved, even for those indoor environments facing challenging outdoor air conditions.

L. Morawska; M. Jamriska; H. Guo; E.R. Jayaratne; M. Cao; S. Summerville

2009-01-01T23:59:59.000Z

323

Performance analysis of supply and return fans for HVAC systems under different operating strategies of economizer dampers  

Science Journals Connector (OSTI)

HVAC systems and associated equipment consume a relatively large fraction of total building energy consumption, a significant portion of which is attributed to fan operation. The operation of economizer dampers when installed can cause high energy consumption in fans if they are not functioning in proper and optimal manner. This will mainly be due to the potential high pressure drops through those dampers and associated high total pressures that should be developed by supply and/or return fans. It is then necessary to ensure that a proper strategy to operate optimally the economizer dampers is implemented with minimum fan energy use. The paper examines several operation strategies of the economizer dampers and investigates their effects on the performance of both the supply and return fans in HVAC system. It also discusses a new operating strategy for economizer dampers that can lead to lower fan energy use. The strategies are evaluated by simulations for a typically existing HVAC system. Several factors such as the building locations, system characteristics, resistance in the duct where the dampers are installed, supply air temperature and economizer control, and minimum ventilation requirements are also considered during the evaluations. The results show that the way of the economizer dampers been controlled has a significant effect on fan performance and its energy use. The proposed strategy if properly implemented can provide fan energy saving in the range of 5–30%, depending mainly on the number of hours when the system operates in the free cooling mode, damper characteristics, and minimum outdoor air.

Nabil Nassif

2010-01-01T23:59:59.000Z

324

DOE 10 CFR Part 429, Docket Number: EERE-2010-BT-CE-0014, RIN...  

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

commercial refrigeration equipment; commercial heating, ventilating, air-conditioning (HVAC) equipment; commercial water heating equipment; walk-in coolers; walk-in freezers;...

325

Advanced Technologies and Practices - Building America Top Innovations...  

Energy Savers [EERE]

and construction practices that improve the building envelope; heating, ventilation, and air conditioning (HVAC); water heating components; and indoor air quality and safety...

326

Microsoft Word - List of Abbreviations.doc  

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

HTTR High Temperature Engineering Test Reactor HTTU High Temperature Test Unit HVAC Heating, ventilating and air conditioning HX Heat exchanger I&C Instrumentation and...

327

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

328

Occupancy Based Demand Response HVAC Control Strategy Varick L. Erickson  

E-Print Network [OSTI]

Occupancy Based Demand Response HVAC Control Strategy Varick L. Erickson University of California an efficient demand response HVAC control strategy, actual room usage must be considered. Temperature and CO2 are used for simulations but not for predictive demand response strategies. In this paper, we develop

Cerpa, Alberto E.

329

HVAC & Building Management Control System Energy Efficiency Replacements  

SciTech Connect (OSTI)

The project objective was the replacement of an aging, un-repairable HVAC system which has grown inefficient and a huge energy consumer with low energy and efficient HVAC units, and installation of energy efficient building control technologies at City's YMCA Community Center.

Hernandez, Adriana

2012-09-21T23:59:59.000Z

330

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

331

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

332

Building Energy Software Tools Directory: HVAC 1 Toolkit  

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

HVAC 1 Toolkit HVAC 1 Toolkit HVAC 1 Toolkit logo. The Toolkit for Primary HVAC System Energy Calculations is a collection of thirty-eight separate subroutines and corresponding documentation that describes algorithms for predicting the performance of HVAC components. The Toolkit documentation includes thorough descriptions of the component models and solution algorithms, detailed information on the structure of the individual FORTRAN 77 routines, as well as illustrative examples of system simulations with the Toolkit routines. The Toolkit serves two purposes: modules for large-scale simulation and stand-alone component performance prediction. The Toolkit components can also be used to calculate the energy performance of a component with a dedicated driver program to provide the necessary information flow to the Toolkit routines.

333

A Fault Detection and Diagnosis Method for HVAC Systems  

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

A Fault Detection and Diagnosis Method for HVAC Systems A Fault Detection and Diagnosis Method for HVAC Systems Speaker(s): Peng Xu Date: December 2, 2002 - 12:00pm Location: Bldg. 90 There is a growing consensus that most buildings do not perform as well as intended and that faults in HVAC systems are widespread in commercial buildings. An automated fault detection and diagnosis tool for HVAC systems is being developed, based on an integrated, life-cycle, approach to commissioning and performance monitoring. The tool uses component-level HVAC equipment models implemented in the SPARK equation-based simulation environment. The models are configured using design information and component manufacturers' data and then fine-tuned to match the actual performance of the equipment by using data measured during functional tests

334

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.

335

VARIABLE SPEED INTEGRATED INTELLIGENT HVAC BLOWER  

SciTech Connect (OSTI)

This comprehensive topical report discusses the key findings in the development of an advanced blower for HVAC applications. The benefits of rearward inclined blades over that of traditional forward inclined blades is well documented, and several prototype wheels are demonstrated in various housings. A comparison of retrofitted blowers to that of three typical units from the industry is presented. The design and modification of the blower housing is addressed and the impact of size limitations on static efficiency is discussed. The roadmap to rearward-inclined wheel technology insertion is presented and typical static efficiency gains are documented.

Herman Wiegman; Charlie Stephens; Xiaoyue Liu; Ralph Carl; Sunny Zhuang; Paul Szczesny; Kamron Wright

2003-09-23T23:59:59.000Z

336

Duty-Cycling Buildings Aggressively: The Next Frontier in HVAC Control  

E-Print Network [OSTI]

Duty-Cycling Buildings Aggressively: The Next Frontier in HVAC Control Yuvraj Agarwal, Bharathan the dominant energy consumer is the HVAC system. Despite this fact, in most buildings the HVAC system is run sensing to guide the operation of a building HVAC system. We show how we can enable aggressive duty

Simunic, Tajana

337

Best Practices for Energy Efficient Cleanrooms Efficient HVAC Systems: Variable-Speed-Drive Chillers  

E-Print Network [OSTI]

LBNL-58636 Best Practices for Energy Efficient Cleanrooms Efficient HVAC Systems: Variable Efficient Cleanrooms Efficient HVAC Water Systems: Variable-Speed-Drive Chillers Tengfang Xu Contents HVAC.................................................................................................................................... 6 #12;HVAC Water Systems Variable-Speed-Drive Chillers Summary Cleanroom energy benchmarking data

338

Evaluation of HVAC filters as a sampling mechanism for indoor microbial communities  

E-Print Network [OSTI]

Evaluation of HVAC filters as a sampling mechanism for indoor microbial communities Federico Noris Fungi Microbial community HVAC filter Settled dust Air a b s t r a c t HVAC filters are in place of bacterial and fungal concentrations and communities in HVAC filter dust and other sampling locations

Siegel, Jeffrey

339

Improving Ventilation and Saving Energy: Final Report on Indoor Environmental Quality and Energy Monitoring in Sixteen Relocatable Classrooms  

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

03E 03E Improving Ventilation and Saving Energy: Final Report on Indoor Environmental Quality and Energy Monitoring in Sixteen Relocatable Classrooms Michael G. Apte, Bourassa Norman*, David Faulkner, Alfred T. Hodgson, Toshfumi Hotchi, Michael Spears, Douglas P. Sullivan, and Duo Wang 4 April 2008 Indoor Environment Department Environmental Energy Technologies Division Lawrence Berkeley National Laboratory *Now with the California Energy Commission PIER Program, Sacramento CA. This research was sponsored by the California Energy Commission through the Public Interest Energy Research program as the Lawrence Berkeley National Laboratory Classroom HVAC: Improving Ventilation and Saving Energy research project, CEC Contract Number 500-03-041.

340

Reaerosolization of Fluidized Spores in Ventilation Systems  

Science Journals Connector (OSTI)

...high-efficiency particulate air filters were added to the air...and air conditioning (HVAC) systems. Particles...deposited on the walls of the HVAC test apparatus (Fig...reaerosolization under simulated HVAC operational conditions...particulate air (HEPA) filter cartridges were added...

Paula Krauter; Arthur Biermann

2007-02-09T23:59:59.000Z

Note: This page contains sample records for the topic "hvac heating ventilating" 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

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,

342

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

343

New Air Cleaning Strategies for Reduced Commercial Building Ventilation Energy  

E-Print Network [OSTI]

Roll–O–Mat polyester type HVAC filter with a thin tackifiera Petri dish. A 47mm cut HVAC filter piece was mounted on anwas loaded on HVAC particle filters, and the formaldehyde

Sidheswaran, Meera

2010-01-01T23:59:59.000Z

344

The Impact of Uncertain Physical Parameters on HVAC Demand Response  

SciTech Connect (OSTI)

HVAC units are currently one of the major resources providing demand response (DR) in residential buildings. Models of HVAC with DR function can improve understanding of its impact on power system operations and facilitate the deployment of DR technologies. This paper investigates the importance of various physical parameters and their distributions to the HVAC response to DR signals, which is a key step to the construction of HVAC models for a population of units with insufficient data. These parameters include the size of floors, insulation efficiency, the amount of solid mass in the house, and efficiency of the HVAC units. These parameters are usually assumed to follow Gaussian or Uniform distributions. We study the effect of uncertainty in the chosen parameter distributions on the aggregate HVAC response to DR signals, during transient phase and in steady state. We use a quasi-Monte Carlo sampling method with linear regression and Prony analysis to evaluate sensitivity of DR output to the uncertainty in the distribution parameters. The significance ranking on the uncertainty sources is given for future guidance in the modeling of HVAC demand response.

Sun, Yannan; Elizondo, Marcelo A.; Lu, Shuai; Fuller, Jason C.

2014-03-01T23:59:59.000Z

345

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

346

Index to Evaluate Energy Efficiency of the Building HVAC System  

E-Print Network [OSTI]

1An Index to Evaluate Energy Efficiency of the Entire Building HVAC System Presented by Dr. Claridge Date: 09/15/2014 ESL-IC-14-09-15 Proceedings of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14..., Beijing, China, September 14-17, 2014 3• Why we need the Energy/Load Ratio 1. Building 2. HVAC Systems 3. Common Index • Building sector consumes 40% of total energy usage in US (Residential buildings – 22%, Commercial building – 19%) • HVAC systems...

Wang, L.; Wang, L.; Claridge,D.

2014-01-01T23:59:59.000Z

347

Secondary Pollutants from Ozone Reaction with Ventilation Filters and Degradation of Filter Media Additives  

E-Print Network [OSTI]

2007. Ozone removal by HVAC filters. Atmospheric Environmentozone reactions on HVAC filters cannot be ignored as aof pollutants from HVAC filters may be degradation of

Destaillats, Hugo

2012-01-01T23:59:59.000Z

348

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

349

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

350

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

351

A Web Based CBR System for HVAC Sales Support  

Science Journals Connector (OSTI)

This paper describes the implementation of a CBR system to support HVAC sales staff operating in remote locations. The ... the world wide web and uses the new standard of XML as a communications protocol between....

Dan Gardingen; Ian Watson

1999-01-01T23:59:59.000Z

352

HVAC Cabinet Air Leakage Test Method- Building America Top Innovation  

Broader source: Energy.gov [DOE]

This 2014 Top Innovation describes Building America research that resulted in the development of an ASHRAE standard and standardized testing method for testing the air leakage of HVAC air handlers and furnace cabinets.

353

Review of Residential Low-Load HVAC Systems  

SciTech Connect (OSTI)

In support of the U.S. Department of Energy’s (DOE’s) Building America Program, Pacific Northwest National Laboratory (PNNL) conducted an investigation to inventory commercially available HVAC technologies that are being installed in low-load homes. The first step in this investigation was to conduct a review of published literature to identify low-load HVAC technologies available in the United States and abroad, and document the findings of existing case studies that have evaluated the performance of the identified technologies. This report presents the findings of the literature review, identifies gaps in the literature or technical understanding that must be addressed before low-load HVAC technologies can be fully evaluated, and introduces PNNL’s planned research and analysis for this project to address identified gaps and potential future work on residential low-load HVAC systems.

Brown, Scott A.; Thornton, Brian; Widder, Sarah H.

2013-09-01T23:59:59.000Z

354

Building HVAC Control System Interaction Issues: Two Case Studies  

E-Print Network [OSTI]

Direct Digital Control (DDC) allows HVAC equipment to be controlled at an upper level (supervisory control) through commands from a central system, or at a lower-level (local-loop control) by local controllers. The various levels of equipment...

Chen, Q.; Deng, S.; Toole, C.; Xu, C.

2007-01-01T23:59:59.000Z

355

Industrial HVAC Air-to-Air Energy Recovery Retrofit Economics  

E-Print Network [OSTI]

Retrofitting air-to-air energy recovery equipment is relatively simply to design and easy to install. Additionally, HVAC energy recovery is almost risk free when compared to process retrofit. Life cycle cost analysis is the best way to illustrate...

Graham, E. L.

1980-01-01T23:59:59.000Z

356

EECBG Success Story: HVAC Upgrade Saving Money, Protecting History  

Broader source: Energy.gov [DOE]

With financial support from a $250,000 PA Conservation Works! grant – funded through the federal Energy Efficiency and Conservation Block Grant program and the Recovery Act – CCHS purchased a new Desert-Aire HVAC system. Learn more.

357

Grundfos HVAC OEM Efficient water hydraulics  

E-Print Network [OSTI]

Compact Hydro Block for Heat Pumps Hydraulic solution for small Heat Pump Systems p condensor Heating Future opportunities for heat pumps Grundfos Compact Hydro block Composite Design for Heat Pumps hydraulics Available today: Compact Hydro Block for integration High degree of pre-design Most important

Oak Ridge National Laboratory

358

Study on Commissioning Process for Control Logic of Thermal Storage System  

E-Print Network [OSTI]

The Heating, Ventilation, and Air-Conditioning (HVAC) System Control Logic Tracer, or 'CLT' , can trace the control moves of an HVAC system and display it on a flowchart based on operation data collected in BEMS. Through comparison between estimates...

Shioya, M.; Tsubaki, M.; Nakahara, N.

2004-01-01T23:59:59.000Z

359

Development of Diagnostic Rules for a Dry Bulb Economizer Mixed Air Loop  

E-Print Network [OSTI]

Diagnostics of heating, ventilating, and air-conditioning (HVAC) systems is becoming increasingly important because of the rising cost of operation and maintenance of HVAC systems. At the same time, computer costs are tumbling allowing their use...

Underwood, D.

1990-01-01T23:59:59.000Z

360

This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception ofpagination. IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING  

E-Print Network [OSTI]

Energy Doctors: An SPC and Kalman Filter-Based Method for System-Level Fault Detection in HVAC Systems energy consumer in buildings is the Heating, Ventilation and Air Conditioning (HVAC) systems. HVAC also ranks top in terms of number of complaints by ten- ants. Maintaining HVAC systems in good conditions

Luh, Peter

Note: This page contains sample records for the topic "hvac heating ventilating" 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

District Wide Geothermal Heating Conversion Blaine County School District  

Broader source: Energy.gov [DOE]

This project will impact the geothermal energy development market by showing that ground source heat pump systems using production and re-injection wells has the lowest total cost of ownership of available HVAC replacement options.

362

Signatures of Heating and Cooling Energy Consumption for Typical AHUs  

E-Print Network [OSTI]

An analysis is performed to investigate the signatures of different parameters on the heating and cooling energy consumption of typical air handling units (AHUs). The results are presented in graphic format. HVAC simulation engineers can use...

Wei, G.; Liu, M.; Claridge, D. E.

1998-01-01T23:59:59.000Z

363

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System  

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

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage Title Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage Publication Type Conference Proceedings Refereed Designation Refereed LBNL Report Number LBNL-6127E Year of Publication 2013 Authors Mammoli, Andrea, Michael Stadler, Nicholas DeForest, Hans Barsun, Richard Burnett, and Chris Marnay Conference Name 3rd International Conference on Microgeneration and Related Technologies Date Published 04/2013 Conference Location Naples, Italy Keywords absorption cooling, mixed integer programming, optimisation, software-as-a-service, thermal storage Abstract The UNM Mechanical Engineering HVAC system incorporates cooling assisted by a 232 m2 solar thermal array providing heat to a 70 kWthermal absorption chiller. A 30 m3 heat storage tank solar decouples heat production and absorption cooling. Additionally, 350 m3 of chilled water storage shifts the cooling electrical load of this high desert location off-peak. While this system already provides substantial energy and cost savings compared to similar conventional buildings, there are still opportunities for improvement. Absorption cooling (augmented by an electrically powered central cooling loop) suffers from parasitic electric loads from a cooling tower pump, a cooling tower fan, and hot and chilled water circulation pumps. Moreover, depending on seasonal, weather, occupancy, and cost conditions, the cold storage tanks may only need partial charging to meet the next day's net building load, and losses need to be considered. Optimally operating this complex thermal-electrical system poses a challenging mathematical problem. A model of the system was built on LBNL's Distributed Resources Customer Adoption Model (DER-CAM) platform. A direct interface between the building energy control system, and DER-CAM hosted on LBNL's server was developed. This interface delivers daily scheduling based on weather forecasts, tariffs, etc., to the building controller. It is found that energy cost savings can be proportionally substantial (almost 30%) - although in this case the payback period for system implementation is long, due to the very low energy consumption of the building. Also, it is found that accurate weather forecasting is a key ingredient of the optimization, although local biases can be corrected for in the optimization.

364

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage  

E-Print Network [OSTI]

Optimised Scheduling of a Solar-Assisted HVAC System withA. Mammoli. Modeling of a solar-assisted HVAC system withOPTIMISED SCHEDULING OF A SOLAR-ASSISTED HVAC SYSTEM WITH

Mammoli, Andrea

2014-01-01T23:59:59.000Z

365

Particulate Fouling of HVAC Heat Exchangers Jeffrey Alexander Siegel  

E-Print Network [OSTI]

DIVISION of the UNIVERSITY OF CALIFORNIA, BERKELEY Committee in charge: Professor Van P. Carey, Chair.4.2 Impaction on refrigerant tubes...............................................23 2.4.3 Gravitational settling

Siegel, Jeffrey

366

Comfort by Design: An Introduction to HVAC's Variable Refrigerant Flow (VRF) Technology  

E-Print Network [OSTI]

Comfort by Design An Introduction to HVAC’s Variable Refrigerant Flow (VRF) Technology Keith Reihl kreihl@hvac.mea.com ESL-KT-14-11-13 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 HVAC Market Overview 0% 27% 9% 5% 4... Through Efficiency Conference, Dallas, Texas Nov. 18-20 How LOUD is a traditional HVAC unit? 33 dB(A) Library 50 dB(A) Refrigerator 60 dB(A) Conversation 78 dB(A) Vacuum 25 dB(A) Recording Studio 65-75 dB(A) Residential 3-ton HVAC Unit How Q IET are VRF...

Reihl,K.

2014-01-01T23:59:59.000Z

367

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...

368

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...

369

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)...

370

Optical Science and Engineering Program Center for High Technology Materials  

E-Print Network [OSTI]

& Administration GA Graduate Assistantship HSC Health Sciences Center HVAC Heating, ventilation, and cooling IARPA for Standards and Technology NRL Naval Research Laboratory NSF National Science Foundation NSMS Nanoscience

New Mexico, University of

371

Energy Department Announces Funding to Develop Improved Next...  

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

to support research and development of the next generation of heating, ventilating, and air conditioning (HVAC) technologies. The R&D will focus on developing regionally...

372

Audit Report: IG-0817 | Department of Energy  

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

portion of those costs, up to 40 percent, were expended for heating, ventilation and air conditioning (HVAC). Because of its size and scope, operating the Department's...

373

National Labs | Department of Energy  

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

as Core Facilities & Capabilities necessary to achieve its goals: Heating, Ventilation, & Air Conditioning (HVAC) Oak Ridge National Laboratory's Building Technologies Research and...

374

Technology Roadmaps | Department of Energy  

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

The Research and Development (R&D) Roadmap for Emerging Heating, Ventilation, and Air-Conditioning (HVAC) Technologies provides recommendations to the Building Technologies...

375

Building America Solution Center - 2014 BTO Peer Review | Department...  

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

and construction. Topics include air sealing and insulation; heating, ventilation, and air conditioning (HVAC) components; windows; indoor air quality; and more. Each topic...

376

Senior U.S. Energy Department Official to Tour Daikin McQuay...  

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

facility. Daikin McQuay - the world's largest producer of heating, ventilation and air conditioning (HVAC) equipment - received 1.4 million in Advanced Manufacturing Tax...

377

New Jersey: Reducing Energy Bills for Camden's Families | Department...  

Energy Savers [EERE]

system. Technicians inject airborne particles into the HVAC (heating, ventilation and air conditioning) duct system. Before the injections, technicians block furnaces, fans,...

378

CX-001671: Categorical Exclusion Determination | Department of...  

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

and Conservation Block Grant (EECBG) Health Department Heating, Ventilating, and Air Conditioning (HVAC) RetrofitUpgrade and Revolving Loan Fund (RLF) (S) CX(s) Applied:...

379

Research & Development Roadmap: Next-Generation Low Global Warming...  

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

Potential Refrigerants Refrigerants are used in a wide variety of heating, ventilation, air conditioning, and refrigeration (HVAC&R) equipment. The current generation of...

380

CX-008732: Categorical Exclusion Determination | Department of...  

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

(INL) Administration Building (IAB) Communication Room Heating, Ventilation, and Air Conditioning (HVAC) Upgrade CX(s) Applied: B1.31 Date: 05212012 Location(s): Idaho...

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Metal Buildings - 2014 BTO Peer Review | Department of Energy  

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

the project addresses infiltration issues that can reduce heating, ventilation, and air conditioning (HVAC) building source usage for single-story metal buildings in...

382

Microsoft Word - Fossil Fuel EA Final EA  

Office of Environmental Management (EM)

Agency EUI Energy use intensity, kBtuft2-yr FR Federal Register ft 2 square feet GHG greenhouse gas HVAC heating, ventilation, and air conditioning IPCC Intergovernmental...

383

{Control of Residential Load Management Networks Using Real Time Pricing  

E-Print Network [OSTI]

Modular and Extensible Systemic Simulation of Demand Response Networks 2.1 Introduction Thermostatically controlled devices, such as heating ventilation and air conditioning (HVAC), refrigerators,

Burke, William Jerome

2010-01-01T23:59:59.000Z

384

Microsoft Word - DOE-ID-INL-14-020.docx  

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

fuel burning equipment would be reduced with the inactivation of these boilers. The heating, ventilating, and air conditioning (HVAC) systems in buildings CFA-623 and CFA-624...

385

DOE Announces up to $29.3 Million in Projects for Research, Developmen...  

Office of Environmental Management (EM)

These projects were selected to accelerate the development of thermoelectric (TE) systems that provides the heating, ventilation, and air conditioning (HVAC) in vehicles. The...

386

seismic margin  

Office of Scientific and Technical Information (OSTI)

particulate air (filter) HFE human failure event HLW high-level radioactive waste HVAC heating, ventilation, and air conditioning ITS important to safety LLW low-level...

387

DATE  

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

will rest on a new concrete foundation and house the necessary heating, ventilation and air conditioning (HVAC), electrical, life safety and communications systems but will not...

388

CX-001530: Categorical Exclusion Determination | Department of...  

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

on existing structures); JJC Day Room Variable Air Volume (VAV) Retrofit; Central Library Air Handler Replacement; Library Heating, Ventilating, and Air Conditioning (HVAC)...

389

Microsoft PowerPoint - February 2, 2007 Agency Update Rev. 2...  

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

63% Procured 48% Constructed Completed heating, ventilation and air conditioning (HVAC) ductwork and fire protection piping design Enclosing LAW with permanent roofingsiding...

390

c1a.xls  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

that have the end use, not consumption specifically for that particular end use. HVAC Heating, Ventilation, and Air Conditioning. Due to rounding, data may not sum to...

391

U.S. Department of Energy NEPA Categorical Exclusion Determination...  

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

7) community outreach program, 8) install a heating, ventilating, and air conditioning (HVAC) system at the Lavonia Housing-South Building (built :1953) as a retrofit for the...

392

E-Print Network 3.0 - argonne superconducting linac Sample Search...  

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

ANL Argonne National Laboratory ANSI American National... superconducting undulator HVAC heating, ventilating, and air conditioning IBS intra-beam scattering ID inner......

393

E-Print Network 3.0 - aircraft exhaust plumes Sample Search Results  

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

Coffee Fig. 16... such as fire spreading 5, heating, ventilating and air conditioning (HVAC), and the thermal plume... a truck exhaust stack while driving. If deliberately...

394

facilities to develop innovative technologies in partnership  

E-Print Network [OSTI]

chambers that can aid in developing improved heating, ventilation and air-conditioning (HVAC) systems . . . . . . . . . . . . . . . . . . .2 Guides needed for Oak Ridge Public Tour . . . . . . . . . . .2 HFIR named Nuclear

395

PHOENIX ENERGIZES LIGHT RAIL CORRIDOR WITH UPGRADES | Department...  

Energy Savers [EERE]

duct sealing; heating, ventilation, and air conditioning (HVAC) upgrades; sunscreens; and solar water heaters. Energize Phoenix eventually expanded its service area beyond the...

396

A  

U.S. Energy Information Administration (EIA) Indexed Site

efficiency (36 percent); improving the efficiency of facility heating, ventilation, and air conditioning (HVAC) systems (23 percent); and. improving the efficiency of facility...

397

U  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

appliances, efficient lighting programs, high-efficiency heating, ventilating and air conditioning (HVAC) systems or control modifications, efficient building design, and...

398

Applications of Optimal Building Energy System Selection and Operation  

E-Print Network [OSTI]

direct control of the solar-assisted heating ventilation and5]. And 4. , the solar-assisted heating ventilation and airPerformance of a Solar-Thermal-Assisted HVAC System,” Energy

Marnay, Chris

2014-01-01T23:59:59.000Z

399

Residential HVAC Data, Assumptions and Methodology for End-Use Forecasting with EPRI-REEPS 2.1  

E-Print Network [OSTI]

Imports/Exports Gas Availability Change efficiency choice equation Add technologiestoHVAC model Adjust cost-efficiency parameter Develop HVAC Conversion

Johnson, F.X.

2010-01-01T23:59:59.000Z

400

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

Note: This page contains sample records for the topic "hvac heating ventilating" 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

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

402

HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review ...  

Energy Savers [EERE]

HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review Presenter: Tony Bouza, U.S. Department of Energy This...

403

Airborne Particulate Matter in HVAC Systems and its Influence on Indoor Air Quality  

E-Print Network [OSTI]

This paper first reviews the mechanisms governing movement of PMs in HVAC systems. Then, the basic equations governing PM deposition in ducts are introduced and investigations on airborne PMs distribution in HVAC systems are reviewed. The influence...

Fu, Z.; Li, N.; Wang, H.

2006-01-01T23:59:59.000Z

404

Building America Whole-House Solutions for New Homes: HVAC Design...  

Energy Savers [EERE]

HVAC Design Strategy for a Hot-Humid Production Builder Building America Whole-House Solutions for New Homes: HVAC Design Strategy for a Hot-Humid Production Builder In this...

405

CoolCab Thermal Load Reduction Project: CoolCalc HVAC Tool Development...  

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

Thermal Load Reduction Project: CoolCalc HVAC Tool Development CoolCab Thermal Load Reduction Project: CoolCalc HVAC Tool Development 2010 DOE Vehicle Technologies and Hydrogen...

406

TITLE: HVAC TESTING & BALANCING FOR MAJOR AND MINOR PROJECTS OBJECTIVE AND  

E-Print Network [OSTI]

TITLE: HVAC TESTING & BALANCING FOR MAJOR AND MINOR PROJECTS OBJECTIVE AND PURPOSE: To provide an independent test & balance for the adjustment of all HVAC systems in all major projects and minor projects

Fernandez, Eduardo

407

Uncertainties in Achieving Energy Savings from HVAC Maintenance Measures in the Field  

E-Print Network [OSTI]

Uncertainties in Achieving Energy Savings from HVAC Maintenance Measures in the Field Kristin utilities across the nation to include HVAC maintenance measures in energy efficiency programs Maintenance measures have a significant potential for energy savings in residential and commercial unitary

California at Davis, University of

408

Building energy modeling programs comparison Research on HVAC systems  

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

energy modeling programs comparison Research on HVAC systems energy modeling programs comparison Research on HVAC systems simulation part Title Building energy modeling programs comparison Research on HVAC systems simulation part Publication Type Journal Year of Publication 2013 Authors Zhou, Xin, Da Yan, Tianzhen Hong, and Dandan Zhu Keywords Building energy modeling programs, comparison tests, HVAC system simulation, theory analysis Abstract Building energy simulation programs are effective tools for the evaluation of building energy saving and optimization of design. The fact that large discrepancies exist in simulated results when different BEMPs are used to model the same building has caused wide concern. Urgent research is needed to identify the main elements that contribute towards the simulation results. This technical report summarizes methodologies, processes, and the main assumptions of three building energy modeling programs (BEMPs) for HVAC calculations: EnergyPlus, DeST, and DOE-2.1E, and test cases are designed to analyze the calculation process in detail. This will help users to get a better understanding of BEMPs and the research methodology of building simulation. This will also help build a foundation for building energy code development and energy labeling programs.

409

Issue #3: HVAC Proper Installation Energy Savings: Over-Promising or Under-Delivering?  

Office of Energy Efficiency and Renewable Energy (EERE)

What energy savings are realistically achievable by following quality installation standards for installation, operation, and maintenance of residential HVAC?

410

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

411

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

412

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

413

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.

414

Sentinel: Occupancy Based HVAC Actuation using Existing WiFi Infrastructure within Commercial Buildings  

E-Print Network [OSTI]

Sentinel: Occupancy Based HVAC Actuation using Existing WiFi Infrastructure within Commercial.agarwal@cs.cmu.edu ABSTRACT Commercial buildings contribute to 19% of the primary energy consumption in the US, with HVAC systems accounting for 39.6% of this usage. To reduce HVAC energy use, prior studies have pro- posed using

Gupta, Rajesh

415

Automated Testing of HVAC Systems for Commissioning Tim Salsbury and Rick Diamond  

E-Print Network [OSTI]

Automated Testing of HVAC Systems for Commissioning Tim Salsbury and Rick Diamond Lawrence Berkeley of the commissioning of HVAC systems. The approach is based on software that generates a sequence of test signals for new and retrofit projects. Introduction The performance of many HVAC systems is limited more by poor

Diamond, Richard

416

Randomized Model Predictive Control for HVAC Systems Alessandra Parisio, Damiano Varagnolo, Daniel Risberg,  

E-Print Network [OSTI]

Randomized Model Predictive Control for HVAC Systems Alessandra Parisio, Damiano Varagnolo, Daniel Conditioning (HVAC) sys- tems play a fundamental role in maintaining acceptable ther- mal comfort and Indoor. A possible solu- tion is to develop effective control strategies for HVAC sys- tems, but this is complicated

Johansson, Karl Henrik

417

Theoretical Estimates of HVAC Duct Channel Capacity for High-Speed Internet Access  

E-Print Network [OSTI]

Theoretical Estimates of HVAC Duct Channel Capacity for High-Speed Internet Access Ariton E. Xhafa-conditioning (HVAC) ducts based on multi-carrier transmission that uses M-QAM mod- ulation and measured channel- flections in HVAC ducts). Our work also shows that data rates in excess of 300 Mbps are possible over

Stancil, Daniel D.

418

Modeling Building Thermal Response to HVAC Virginia Smith, Tamim Sookoor, and Kamin Whitehouse  

E-Print Network [OSTI]

Modeling Building Thermal Response to HVAC Zoning Virginia Smith, Tamim Sookoor, and Kamin,sookoor,whitehouse}@virginia.edu Abstract. HVAC systems account for 38% of building energy usage. Studies have indicated at least 5 HVAC systems to enable room-level zoning where each room is conditioned in- dividually based on its

Whitehouse, Kamin

419

A LIBRARY OF HVAC COMPONENT MODELS FOR USE IN AUTOMATED1 DIAGNOSTICS2  

E-Print Network [OSTI]

A LIBRARY OF HVAC COMPONENT MODELS FOR USE IN AUTOMATED1 DIAGNOSTICS2 3 4 Peng Xu, Philip Haves HVAC system (air handling units and air distribution systems). The models are used to predict of automatic documentation methods in the library. INTRODUCTION The increasing complexity of building HVAC

420

Comparison of HVAC filter test methods for particle removal efficiency Brent Stephens1,*  

E-Print Network [OSTI]

Comparison of HVAC filter test methods for particle removal efficiency Brent Stephens1,* , Jeffrey Introduction The use of HVAC filters in buildings is one strategy to reduce occupant exposure to particulate matter. However, HVAC filters are typically tested only in laboratory settings and little is known about

Siegel, Jeffrey

Note: This page contains sample records for the topic "hvac heating ventilating" 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

BLACK-BOX MODELLING OF HVAC SYSTEM: IMPROVING THE PERFORMANCES OF NEURAL NETWORKS  

E-Print Network [OSTI]

BLACK-BOX MODELLING OF HVAC SYSTEM: IMPROVING THE PERFORMANCES OF NEURAL NETWORKS Eric FOCK Ile de La Réunion - FRANCE ABSTRACT This paper deals with neural networks modelling of HVAC systems of HVAC system can be modelled using manufacturer design data presented as derived performance maps

Boyer, Edmond

422

Conventional Facilities Chapter 6: HVAC Systems 6-1 NSLS-II Preliminary Design Report  

E-Print Network [OSTI]

Conventional Facilities Chapter 6: HVAC Systems 6-1 NSLS-II Preliminary Design Report 6 MECHANICAL ­ HVAC SYSTEMS 6.1 Design Criteria 6.1.1 Codes and Standards The latest edition of the codes, standards have adequate capacity and head, no chilled water pumps #12;Conventional Facilities Chapter 6: HVAC

Ohta, Shigemi

423

VOLUME 16, NUMBER 3 HVAC&R RESEARCH MAY 2010 The Effects of Filtration on  

E-Print Network [OSTI]

VOLUME 16, NUMBER 3 HVAC&R RESEARCH MAY 2010 273 The Effects of Filtration on Pressure Drop and Energy Consumption in Residential HVAC Systems (RP-1299) Brent Stephens Atila Novoselac, PhD Jeffrey A of high-efficiency HVAC filters is a common strategy to control exposure to airborne particulate matter

Siegel, Jeffrey

424

Comparison of dust from HVAC filters, indoor surfaces, and indoor air Federico Noris*  

E-Print Network [OSTI]

Comparison of dust from HVAC filters, indoor surfaces, and indoor air Federico Noris* , Kerry A and Environmental Engineering * Corresponding email: Fedenoris@mail.utexas.edu SUMMARY HVAC filters are long heavy metal (Pb, Cd and As) concentrations. HVAC filter microbial concentrations appear to be consistent

Siegel, Jeffrey

425

A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS  

E-Print Network [OSTI]

1 A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS T. I describes a control scheme with fault detection capabilities suitable for application to HVAC systems as a reference of correct operation. Faults that occur in the HVAC system under control cause the PI

426

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.

427

Commissioning and Performance Diagnostics for HVAC Control Systems  

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

Commissioning and Performance Diagnostics for HVAC Control Systems Commissioning and Performance Diagnostics for HVAC Control Systems Speaker(s): Ashish Singhal Date: December 20, 2006 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Philip Haves The presentation will focus on practical aspects of commissioning control loops in commercial HVAC systems and evaluating their routine performance. Simple and theoretically sound methods for diagnosing control performance will be presented that detect serious performance issues associated with control loops in modern buildings. The discussion will center on a new control loop commissioning tool that helps field personnel to quickly test, tune and troubleshoot control loops. In addition to the active tests for commissioning control loops, a suite of diagnostic algorithms are used in a

428

Optimized HVAC Management Service to Enhance Demand Response  

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

Optimized HVAC Management Service to Enhance Demand Response Optimized HVAC Management Service to Enhance Demand Response Speaker(s): John Steinberg Date: August 18, 2011 - 12:00pm Location: 90-4133 Seminar Host/Point of Contact: Janie Page Many utilities are investing vast sums deploying smart meters to customers, some of whom remain stubbornly opposed to those deployments, in large part because they remain unmoved by the claimed benefits. EcoFactor has developed a thermostat management service that delivers (and quantifies) significant energy savings for consumers and a number of additional benefits to other players in the energy value chain. It does so without relying on consumers to modify behavior, study energy information displays, or even pay attention to their energy use. EcoFactor also significantly boosts DR yield while it increases occupant comfort. It can identify HVAC

429

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

430

Enforcement Policy Statement: Commercial HVAC Equipment  

Office of Environmental Management (EM)

policy statements regarding Departmental testing of commercial air conditioners and heat pumps subject to test procedures and energy conservation standards found at 10 C.F.R....

431

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

432

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

433

Optimizing HVAC Control to Improve Building Comfort and Energy Performance  

E-Print Network [OSTI]

This paper demonstrates the benefits of optimal control in well-designed and operated buildings using a case study. The case study building was built in 2001. The HVAC and control systems have been installed with state-of-the-art equipment which...

Song, L.; Joo, I.; Dong, D.; Liu, M.; Wang, J.; Hansen, K.; Quiroz, L.; Swiatek, A.

2003-01-01T23:59:59.000Z

434

Air filtration: Choosing the right filter class for HVAC systems  

Science Journals Connector (OSTI)

As anyone who works with air filtration knows, getting the best from a system is about more than choosing efficient media and correct installation. Thomas Carlson of Vokes Air explains the importance of using and selecting the right filter class for a typical HVAC system.

Thomas Carlson

2008-01-01T23:59:59.000Z

435

Performance Validation and Energy Analysis of HVAC Systems using Simulation  

E-Print Network [OSTI]

that energy savings of between 15% and 40% could be made in commercial buildings by closer monitoring and supervision of energy-usage and related data. An earlier study by Kao and Pierce (1983) showed that sensor1 Performance Validation and Energy Analysis of HVAC Systems using Simulation Tim Salsbury and Rick

Diamond, Richard

436

Advanced Variable Speed Air-Source Integrated Heat Pump  

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

variable speed air-source variable speed air-source integrated heat pump (AS-IHP) - CRADA Van D. Baxter Oak Ridge National Laboratory vdb@ornl.gov; 865-574-2104 April 3, 2013 Development of advanced HVAC/WH system options for efficient residential or small commercial buildings, new const. or retrofit * ET R&D project in support of DOE/BTO Goal of 50% Reduction in Building Energy Use by 2030 IHP concept - all HVAC & WH services integrated into

437

Advanced Variable Speed Air-Source Integrated Heat Pump  

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

variable speed air-source variable speed air-source integrated heat pump (AS-IHP) - CRADA Van D. Baxter Oak Ridge National Laboratory vdb@ornl.gov; 865-574-2104 April 3, 2013 Development of advanced HVAC/WH system options for efficient residential or small commercial buildings, new const. or retrofit * ET R&D project in support of DOE/BTO Goal of 50% Reduction in Building Energy Use by 2030 IHP concept - all HVAC & WH services integrated into

438

Energy Saving Measures of Heating Network - Computerized Real-time Control System  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, ChinaHVAC Technologies for Energy Efficiency, Vol. IV-12-9 Energy Saving Measures of Heating Network ?Computerized Real-time Control System Jieyan Zhang Service Bureau, Deputy-director, State...

Zhang, J.

2006-01-01T23:59:59.000Z

439

Overview of Fords Thermoelectric Programs: Waste Heat Recovery and Climate Control  

Broader source: Energy.gov [DOE]

Overview of progress in TE waste heat recovery from sedan gasoline-engine exhaust, TE HVAC system in hybrid sedan, and establishing targets for cost, power density, packaging, durability, and systems integration

440

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

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Status of Revisions to ASHRAE Standard 62  

E-Print Network [OSTI]

The American Society of Heating Refrigerating and Air Conditioning Engineers (ASHRAE) Standard 62- 1989 "Ventilation for Acceptable Indoor air Quality", adopted in 1989, is widely used by HVAC engineers to determine ventilation rates for various...

Gallo, F. M.

1998-01-01T23:59:59.000Z

442

Building HVAC Requirements Overview Page 4-1 4 Building HVAC Requirements  

E-Print Network [OSTI]

heating, radiant floor systems, evaporative cooling, gas cooling, ground-source heat pumps, and wood space requirements for additions to existing dwellings and for alterations to existing heating and cooling systems packages. Package C permits electric resistance space heating, but requires significantly greater

443

This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research  

E-Print Network [OSTI]

Keywords: Sensor modeling Heating Ventilation Air conditioning systems Sensor monitoring Data mining Neural indoor-air-quality (IAQ) sensors used in heating, ventilation, and air conditioning (HVAC) systems, and air conditioning (HVAC) systems en- sure good quality air inside buildings. Statistics show that main

Kusiak, Andrew

444

Comparison of emerging diagnostic tools for large commercial HVAC systems  

SciTech Connect (OSTI)

Diagnostic software tools for large commercial buildings are being developed to help detect and diagnose energy and other performance problems with building operations. These software applications utilize energy management control system (EMCS) trend log data. Due to the recent development of diagnostic tools, there has been little detailed comparison among the tools and a limited awareness of tool capabilities by potential users. Today, these diagnostic tools focus mainly on air handlers, but the opportunity exists for broadening the scope of the tools to include all major parts of heating, cooling, and ventilation systems in more detail. This paper compares several tools in the following areas: (1) Scope, intent, and background; (2) Data acquisition, pre-processing, and management; (3) Problems detected; (4) Raw data visualization; (5) Manual and automated diagnostic methods and (6) Level of automation. This comparison is intended to provide practitioners and researchers with a picture of the current state of diagnostic tools. There is tremendous potential for these tools to help improve commercial building energy and non-energy performance.

Friedman, Hannah; Piette, Mary Ann

2001-04-06T23:59:59.000Z

445

Thermal Storage Options for HVAC Systems  

E-Print Network [OSTI]

this method is based on the specific heat of water rather than the latent 'heat of fusion of ice as in ice storage, it requires about 4 times the storage capacity of an equivalent ice storage system. ? Salt Storage: This system utilizes eutectic salts... which freeze and melt around 47 o F. Exist ing chillers can be easily retrofitted for salt storage or chilled water storage. For ice stor age systems, a direct refrigerant system or glycol chillers are suitable. This paper discusses the details...

Weston, R. F.; Gidwani, B. N.

446

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

447

Assessment of organic compound exposures, thermal comfort parameters, and HVAC system-driven air exchange rates in public school portable classrooms in California  

E-Print Network [OSTI]

no no, y e s - only HVAC filters: sizes, when changed 68%n=2) (n=19) 100% no 95% no Current HVAC air filter was notoriginal When HVAC air filter was last changed (reported as

Shendell, Derek Garth

2010-01-01T23:59:59.000Z

448

Two Alabama Elementary Schools Get Cool with New HVAC Units | Department of  

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

Alabama Elementary Schools Get Cool with New HVAC Units Alabama Elementary Schools Get Cool with New HVAC Units Two Alabama Elementary Schools Get Cool with New HVAC Units October 1, 2010 - 2:05pm Addthis Winston County School District will receive 14 new HVAC units with State Energy Program funding. | File photo Winston County School District will receive 14 new HVAC units with State Energy Program funding. | File photo Lindsay Gsell What are the key facts? Two public elementary schools receive 14 new HVAC units for classrooms. School district estimates nearly 10 percent in electrical savings with new units. Nineteen Alabama public school districts using Recovery Act grants to save energy and money. Addison Elementary School and Double Springs Elementary School in northwestern Alabama were warm. Some classrooms just didn't cool fast enough. The buildings, which were

449

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

450

Total Quality Commissioning for HVAC Systems to Assure High Performance Throughout the Whole Life Cycle  

E-Print Network [OSTI]

TOTAL QUALITY COMMISSIONING FOR HVAC SYSTEMS TO ASSURE HIGH PERFORMANCE THROUGHOUT THE WHOLE LIFE CYCLE By: Grahame E. Maisey, P.E., and Beverly Milestone, LEED AP Building Services Consultants INTRODUCTION Current HVAC systems... are not coming close to approaching life cycle performance expectations for energy, operation and maintenance, occupant comfort and productivity and longevity. HVAC systems in buildings claiming to be sustainable, with integrated, energy conscious design...

Maisey, G.; Milestone, B.

2005-01-01T23:59:59.000Z

451

Outdoor airflow into HVAC systems: An evaluation of measurement  

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

Outdoor airflow into HVAC systems: An evaluation of measurement Outdoor airflow into HVAC systems: An evaluation of measurement technologies Title Outdoor airflow into HVAC systems: An evaluation of measurement technologies Publication Type Report LBNL Report Number LBNL-53834 Year of Publication 2003 Authors Fisk, William J., David Faulkner, Douglas P. Sullivan, and William W. Delp Abstract During the last few years, new technologies have been introduced for measuring the flow rates of outdoor air (OA) into HVAC systems; however, an evaluation of these measurement technologies has not previously been published. This document describes a test system and protocols developed for controlled evaluation of these measurement technologies. The results of tests of three measurement technologies are also summarized. The test system and protocol were judged practical and very useful. The test results indicate that one measurement technology can measure OA flow rates with errors of 20% or less without a field-based calibration, as long as the OA velocities are sufficient to provide an accurately measurable pressure signal. The test results for a second measurement technology are similar; however, a difficult field-based calibration relating the OA flow rate with the pressure signal would be required to reduce errors below approximately 30%. The errors in OA flow rates measured with the third measurement technology, that uses six electronic airspeed sensors downstream of the OA inlet louver, exceeded 100%; however, these errors could be substantially reduced through a difficult field based calibration. The effects of wind on the accuracy of these measurement technologies still needs to be evaluated

452

Measuring rates of outdoor airflow into HVAC systems  

SciTech Connect (OSTI)

During the last few years, new technologies have been introduced for measuring the flow rates of outside air into HVAC systems. This document describes one particular technology for measuring these airflows, a system and a related protocol developed to evaluate this and similar measurement technologies under conditions without wind, and the results of our evaluations. We conclude that the measurement technology evaluated can provide a reasonably accurate measurement of OA flow rate over a broad range of flow, without significantly increasing airflow resistance.

Fisk, William J.; Faulkner, David; Sullivan, Douglas P.; Delp, Woody

2002-10-01T23:59:59.000Z

453

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":""}]}

454

DOE Zero Energy Ready Home Low Load High Efficiency HVAC Webinar (Text Version)  

Broader source: Energy.gov [DOE]

Below is the text version of the DOE Zero Energy Ready Home webinar, Low Load High Efficiency HVAC, presented in May 2014.

455

Characterization of the HVAC performance with defroster grillers and instrument panel registers  

Science Journals Connector (OSTI)

Improving HVAC performance is of paramount importance to sustain ... was between 15 to 25 degrees with a standard distance ratio of one. During the cooling...

M. F. Kader; Y. M. Youn; Y. D. Jun…

2009-06-01T23:59:59.000Z

456

Numerical Investigation of Flow Induced Noise in a Simplified HVAC Duct with OpenFOAM.  

E-Print Network [OSTI]

?? Due to the growing demand for comfort, the noise generated by HVAC components should be considered by the designers. Flow induced noise is one… (more)

Wang, Cong

2013-01-01T23:59:59.000Z

457

REDESIGN OF HVAC SYSTEM TO IMPROVE ENERGY EFFICIENCY OF EDUCATIONAL BUILDING.  

E-Print Network [OSTI]

??An energy modeling software was used to analyze the current building configuration and simulations were performed in an attempt to redesign the current HVAC system… (more)

Hagene, Brian Matthew

2012-01-01T23:59:59.000Z

458

Development of a High-Efficiency Zonal Thermoelectric HVAC System for Automotive Applications  

Broader source: Energy.gov [DOE]

Identify a technical and business approach to accelerate the deployment of light-duty automotive TE HVAC technology, maintain occupant comfort, and improve energy efficiency.

459

Inverted Attic Bulkhead for HVAC Ductwork, Roseville, California (Fact Sheet), Building America Case Study: Efficient Solutions for New and Existing Homes, Building Technologies Office (BTO)  

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

Inverted Attic Bulkhead for Inverted Attic Bulkhead for HVAC Ductwork Roseville, California PROJECT INFORMATION Project Name: Long-Term Monitoring of Occupied Test House Location: Roseville, CA Partners: K. Hovnanian® Homes®, www.khov.com IBACOS www.ibacos.com Building Component: Envelope, structural, HVAC ducts Construction: New Application: New; single and/or multifamily Year Tested: 2012 Applicable Climate Zone(s): Hot-dry climate PERFORMANCE DATA HERS Index: 52 Projected Energy Savings: 11 million Btu/year heating and cooling savings Projected Energy Cost Savings: $116/year Modifying the truss system of a new home to accommodate ductwork within an inverted insulated bulkhead along the attic floor can save energy by placing

460

ISFV14 -14th International Symposium on Flow Visualization  

E-Print Network [OSTI]

FLOWS: HVAC-BOS Michael J. Hargather and Gary S. Settles Gas Dynamics Laboratory, Mechanical & Nuclear airflow patterns in the heating, ventilation, and air-conditioning (HVAC) field. We propose background-dimensional. Finally, BOS lends itself well to certain HVAC chores such as the diagnosis of commercial kitchen

Settles, Gary S.

Note: This page contains sample records for the topic "hvac heating ventilating" 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

Demo Abstract: TOSS: Thermal Occupancy Sensing System  

E-Print Network [OSTI]

to a building's energy management system in order to control the Heating, Ventilation, Air Condition- ing, (HVAC, Measurement, Performance Keywords Occupancy sensing, Occupancy-based HVAC 1. INTRODUCTION To increase energy materials harnessing passive solar technologies along with increasingly efficient HVAC systems have

Cerpa, Alberto E.

462

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage  

E-Print Network [OSTI]

solar energy available would result in overcharging of the hot storage.of a solar-assisted HVAC system with thermal storage. Energystorage and solar- assisted HVAC for the purpose of optimizing its energy

Mammoli, Andrea

2014-01-01T23:59:59.000Z

463

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage  

E-Print Network [OSTI]

of a solar-thermal- assisted hvac system. Energy andsolar thermal collectors using flat reflective surfaces. Solar Energy,of a solar-assisted HVAC system with thermal storage. Energy

Mammoli, Andrea

2014-01-01T23:59:59.000Z

464

Procedures to identify Energy Conservation Opportunities applied to HVAC system: example of VSD of chilled water pumps  

E-Print Network [OSTI]

Procedures to identify Energy Conservation Opportunities applied to HVAC system: example of VSD of HVAC equipment using variable speed drive (VSD) is an Energy Conservation Opportunity (ECO) which can

Paris-Sud XI, Université de

465

Proceedings of Healthy Buildings 2009 Paper 535 HVAC filters as "passive" samplers: fate analysis of indoor particles  

E-Print Network [OSTI]

Proceedings of Healthy Buildings 2009 Paper 535 HVAC filters as "passive" samplers: fate analysis the effectiveness of using HVAC filters as an indoor sampling technique. #12;Proceedings of Healthy Buildings 2009

Siegel, Jeffrey

466

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

467

Proposal for the Award of a Contract for Maintenance, Operation and Minor Installation Work for CERN Cooling and HVAC Systems  

E-Print Network [OSTI]

Proposal for the Award of a Contract for Maintenance, Operation and Minor Installation Work for CERN Cooling and HVAC Systems

1996-01-01T23:59:59.000Z

468

Residential commissioning to assess envelope and HVAC system performance  

SciTech Connect (OSTI)

Houses do not perform optimally or even as many codes and forecasts predict. For example, Walker et al. (1998a) found large variations in thermal distribution system efficiency, as much as a factor of two even between side-by-side houses with the same system design and installation crew. This and other studies (e.g., Jump et al. 1996) indicate that duct leakage testing and sealing can readily achieve a 25 to 30% reduction in installed cooling capacity and energy consumption. As another example, consider that the building industry has recognized for at least 20 years the substantial impact that envelope airtightness has on thermal loads, energy use, comfort, and indoor air quality. However, Walker et al. (1998a) found 50% variances in airtightness for houses with the same design and construction crews, within the same subdivision. A substantial reason for these problems is that few houses are now built or retrofitted using formal design procedures, most are field assembled from a large number of components, and there is no consistent process to identify problems or to correct them. Solving the problems requires field performance evaluations of houses using appropriate and agreed upon procedures. Many procedural elements already exist in a fragmented environment; some are ready now to be integrated into a new process called residential commissioning (Wray et al. 2000). For example, California's Title 24 energy code already provides some commissioning elements for evaluating the energy performance of new houses. A house consists of components and systems that need to be commissioned, such as building envelopes, air distribution systems, cooling equipment, heat pumps, combustion appliances, controls, and other electrical appliances. For simplicity and practicality, these components and systems are usually evaluated individually, but we need to bear in mind that many of them interact. Therefore, commissioning must not only identify the energy and non-energy benefits associated with improving the performance of a component, it must also indicate how individual components interact in the complete building system. For this paper, we limit our discussion to diagnostics in areas of particular concern with significant interactions: envelope and HVAC systems. These areas include insulation quality, windows, airtightness, envelope moisture, fan and duct system airflows, duct leakage, cooling equipment charge, and combustion appliance backdrafting with spillage. The remainder of this paper first describes what residential commissioning is, its characteristic elements, and how one might structure its process. Subsequent sections describe a consolidated set of practical diagnostics that the building industry can use now. Where possible, we also discuss the accuracy and usability of these diagnostics, based on recent laboratory work and field studies. We conclude by describing areas in need of research and development, such as practical field diagnostics for envelope thermal conductance and combustion safety. There are several potential benefits for builders, consumers, code officials, utilities, and energy planners of commissioning houses using a consistent set of validated methods. Builders and/or commissioning agents will be able to optimize system performance and reduce consumer costs associated with building energy use. Consumers will be more likely to get what they paid for and builders can show they delivered what was expected. Code officials will be better able to enforce existing and future energy codes. As energy reduction measures are more effectively incorporated into the housing stock, utilities and energy planners will benefit through greater confidence in predicting demand and greater assurance that demand reductions will actually occur. Performance improvements will also reduce emissions from electricity generating plants and residential combustion equipment. Research to characterize these benefits is underway.

Wray, Craig P.; Sherman, Max H.

2001-08-31T23:59:59.000Z

469

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

470

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

471

HVAC Component Data Modeling Using Industry Foundation Classes Vladimir Bazjanac, Lawrence Berkeley National Laboratory, U.S.A.  

E-Print Network [OSTI]

1 HVAC Component Data Modeling Using Industry Foundation Classes Vladimir Bazjanac, Lawrence. This paper describes a number of aspects of a major extension of the HVAC part of the IFC data model. First is the introduction of a more generic approach for handling HVAC components. This includes type information, which

472

1736 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 51, NO. 10, OCTOBER 2003 Impulse Response of the HVAC Duct as a  

E-Print Network [OSTI]

of the HVAC Duct as a Communication Channel Pavel V. Nikitin, Member, IEEE, Daniel D. Stancil, Senior Member (HVAC) ducts in buildings behave as multimode waveguides when excited at radio frequencies and thus, can of a usual indoor propagation channel. In this paper, we describe physical mechanisms which affect the HVAC

Hochberg, Michael

473

7/11/00-draft copy: do not quote 1 of 30 New Technologies for Residential HVAC Ducts  

E-Print Network [OSTI]

7/11/00-draft copy: do not quote 1 of 30 New Technologies for Residential HVAC Ducts Burke Treidler is not evaluated and HVAC contractors overcome duct system shortcomings by installing oversized equipment Technologies for Residential HVAC Ducts fittings with some use of ductboard. Fittings that snap together were

474

HVAC filter bypass modelling and experimental validation Jeffrey A. Siegel1,*  

E-Print Network [OSTI]

standards that address HVAC filtration efficacy including ASHRAE Standard 52.2 (ASHRAE, 2007) and EN 779HVAC filter bypass modelling and experimental validation Jeffrey A. Siegel1,* , David B. Chojnowski of filter bypass, an ASHRAE Standard 52.2-2007 compliant apparatus was modified to accept filters

Siegel, Jeffrey

475

Electric, Gas, and Electric/Gas Energy Options for Cold-Air HVAC Systems  

E-Print Network [OSTI]

An important aspect of the design of cost-effective HVAC systems today is (a) sensitivity to the cost impact of the interplay of utility demand charges, time-of-day rates, gas rates, and gas/electric utility incentive programs vis-à-vis HVAC system...

Meckler, G.

1989-01-01T23:59:59.000Z

476

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

477

Source attenuating HVAC equipment—Just the facts  

Science Journals Connector (OSTI)

Current classroom designs range from NC 63 to NC 25. The ASA/ANSI 12.60 Classroom Standard sets a relatively low background sound requirement for classrooms. Achieving 12.60 levels economically requires the maximum in source sound attenuation. This paper will provide a manufacturer’s perspective on current and low noiseHVAC products and the resulting classroomsound levels. Predictive acoustics software will be used to predict the space sound power level and some indication of equipment cost will be provided in order to assist designers in what is the best approach to low noiseclassroom design.

2004-01-01T23:59:59.000Z

478

Short communication Optimization of hybrid ground coupled and air source heat pump systems  

E-Print Network [OSTI]

Short communication Optimization of hybrid ­ ground coupled and air source ­ heat pump systems 2008 Accepted 14 January 2010 Available online 28 January 2010 Keywords: Ground coupled heat pump Air to water heat pump Thermal storage device Hybrid HVAC system Energy efficiency Numerical simulation a b

Fernández de Córdoba, Pedro

479

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.

480

PV modules, with a life measured in decades, will typically be in place longer than the outdoor unit of a HVAC system.  

E-Print Network [OSTI]

unit of a HVAC system. When the performance of an HVAC system deteriorates, it is usually inspected remain installed on the roof even after the system is no longer being used. Although HVAC units have only jumpers and screws effectively bond all parts of the listed device together. HVAC components are typically

Johnson, Eric E.

Note: This page contains sample records for the topic "hvac heating ventilating" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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481

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

482

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,...

483

A Survey and Critical Review of the Literature on Indoor Air Quality, Ventilation and Health Symptoms in Schools  

E-Print Network [OSTI]

after which the filters in the HVAC systems were sprayedPoor HVAC Condensation Drain Poor Access to Filters, etc.Low Filter Efficiency Poor Outdoor Air Intake Location HVAC

Daisey, Joan M.

2010-01-01T23:59:59.000Z

484

HVAC Right-Sizing Part 1: Calculating Loads  

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

Building America Building America Presented by: Mike Gestwick - National Renewable Energy Laboratory Arlan Burdick, Anthony Grisolia - IBACOS, a Building America Research Team HVAC Right-Sizing Part 1: Calculating Loads Thursday, April 28 11:00 a.m. - 12:00 p.m. Eastern Building Technologies Program Mike Gestwick michael.gestwick@nrel.gov Building America: Introduction April 28, 2011 Introduction to Building America * 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 www.buildingamerica.gov 15 Industry Research Teams Habitat Cost Effective Energy Retrofit Program

485

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

486

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.

487

Fight Fall Allergies and Save Energy by Checking Your HVAC System |  

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

Fight Fall Allergies and Save Energy by Checking Your HVAC System Fight Fall Allergies and Save Energy by Checking Your HVAC System Fight Fall Allergies and Save Energy by Checking Your HVAC System October 15, 2012 - 3:19pm Addthis Change your furnace filter to help keep allergies at bay and keep your furnace and air conditioner running efficiently. | Photo courtesy of ©iStockphoto.com/JaniceRichard. Change your furnace filter to help keep allergies at bay and keep your furnace and air conditioner running efficiently. | Photo courtesy of ©iStockphoto.com/JaniceRichard. Elizabeth Spencer Communicator, National Renewable Energy Laboratory What does this mean for me? Change your furnace filters every month or two to keep your HVAC equipment operating efficiently. I have unbelievably horrible fall allergies. I've never figured out what

488

Total and Peak Energy Consumption Minimization of Building HVAC Systems Using Model Predictive Control  

E-Print Network [OSTI]

inputs. The idea of modeling building thermal behavior usingThe detail of building thermal modeling is pre- sented in [Modeling and optimal control algorithm design for hvac systems in energy efficient buildings,’’

Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2012-01-01T23:59:59.000Z

489

What are the Best HVAC Solutions for Low-Load, High Performance Homes?"  

Broader source: Energy.gov [DOE]

This presentation was given at the Summer 2012 DOE Building America meeting on July 26, 2012, and addressed the question What are the best HVAC solutions for low-load, high performance homes?"

490

Analysis of the HVAC System at the Willow Branch Intermediate School  

E-Print Network [OSTI]

This report presents an analysis of the HVAC system at the Willow Branch Intermediate School for the MEEN 685 class project. The school is located at College Station, Texas. A portion of the school belonged to Oakwood Intermediate School which...

Wei, G.

1997-01-01T23:59:59.000Z

491

Application of Various HVAC Simulation Programs and Visual Tools to Commissioning  

E-Print Network [OSTI]

Various existing HVAC system simulation programs and visualization tools are considered to be potentially powerful tools for commissioning. Although not originally developed as commissioning tools, these programs facilitate the confirmation...

Zheng, M.; Pan, S.

2007-01-01T23:59:59.000Z

492

DOE Convening Report on Certification of Commercial HVAC and CRE Products  

Broader source: Energy.gov [DOE]

This document is the convening report on the feasibility of a negotiated rulemaking to revise the certification program for commercial HVAC and CRE products published on October 2, 2012.

493

Requirements for Commissioning HVAC Systems Using BEMS and Commissioning the BEMS Itself Based on Questionnaire Surveys  

E-Print Network [OSTI]

In this paper the present status and requirements for commissioning of HVAC Systems using Building Energy Management Systems (BEMS) and commissioning the BEMS itself are investigated and summarized. The information presented is based on the results...

Yoshida, H.; Vaezi-Nejad, H.; Choiniere, D.; Wang, F.

2004-01-01T23:59:59.000Z

494

A Qualitive Modeling Approach for Fault Detection and Diagnosis on HVAC Systems  

E-Print Network [OSTI]

This paper describes the basics and first test results of a model based approach using qualitative modeling to perform Fault Detection and Diagnostics (FDD) on HVAC and R systems. A quantized system describing the qualitative behavior of a...

Muller, T.; Rehault, N.; Rist, T.

2013-01-01T23:59:59.000Z

495

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

496

A Unified and Integrated Energy Management System for HVAC Spaces and Power House  

E-Print Network [OSTI]

A UNIFIED AND INTEGRATED ENERGY MANAGEMENT SYSTEM FOR HVAC SPACES AND POWER HOUSE A.Kaya The University of Akron Mechanical Engineering Akron,OH 44325 ABSTRACT This paper describes a totally integrated energy management system throughout... the plant and facilities. The equipment involves: the power flant (boilers, cogeneration turbines, chillers); HVAC 0 buildings; air handling and other distribution systems. The energy management system has the architecture for data transmission...

Kaya, A.; Debban, G. D.

497

Final Scientific/Technical Report [Recovery Act: Districtwide Geothermal Heating Conversion  

SciTech Connect (OSTI)

The Recovery Act: Districtwide Geothermal Heating Conversion project performed by the Blaine County School District was part of a larger effort by the District to reduce operating costs, address deferred maintenance items, and to improve the learning environment of the students. This project evaluated three options for the ground source which were Open-Loop Extraction/Re-injection wells, Closed-Loop Vertical Boreholes, and Closed-Loop Horizontal Slinky approaches. In the end the Closed-Loop Horizontal Slinky approach had the lowest total cost of ownership but the majority of the sites associated with this project did not have enough available ground area to install the system so the second lowest option was used (Open-Loop). In addition to the ground source, this project looked at ways to retrofit existing HVAC systems with new high efficiency systems. The end result was the installation of distributed waterto- air heat pumps with water-to-water heat pumps installed to act as boilers/chillers for areas with a high ventilation demand such as they gymnasiums. A number of options were evaluated and the lowest total cost of ownership approach was implemented in the majority of the facilities. The facilities where the lowest total cost of ownership approaches was not selected were done to maintain consistency of the systems from facility to facility. This project had a number of other benefits to the Blaine County public. The project utilizes guaranteed energy savings to justify the levy funds expended. The project also developed an educational dashboard that can be used in the classrooms and to educate the community on the project and its performance. In addition, the majority of the installation work was performed by contractors local to Blaine County which acted as an economic stimulus to the area during a period of recession.

Chatterton, Mike

2014-02-12T23:59:59.000Z

498

Case study field evaluation of a systems approach to retrofitting a residential HVAC system  

SciTech Connect (OSTI)

This case study focusing on a residence in northern California was undertaken as a demonstration of the potential of a systems approach to HVAC retrofits. The systems approach means that other retrofits that can affect the HVAC system are also considered. For example, added building envelope insulation reduces building loads so that smaller capacity HVAC system can be used. Secondly, we wanted to examine the practical issues and interactions with contractors and code officials required to accomplish the systems approach because it represents a departure from current practice. We identified problems in the processes of communication and installation of the retrofit that led to compromises in the final energy efficiency of the HVAC system. These issues must be overcome in order for HVAC retrofits to deliver the increased performance that they promise. The experience gained in this case study was used to optimize best practices guidelines for contractors (Walker 2003) that include building diagnostics and checklists as tools to assist in ensuring the energy efficiency of ''house as a system'' HVAC retrofits. The best practices guidelines proved to be an excellent tool for evaluating the eight existing homes in this study, and we received positive feedback from many potential users who reviewed and used them. In addition, we were able to substantially improve the energy efficiency of the retrofitted case study house by adding envelope insulation, a more efficient furnace and air conditioner, an economizer and by reducing duct leakage.

Walker, Iain S.; McWiliams, Jennifer A.; Konopacki, Steven J.

2003-09-01T23:59:59.000Z

499

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

500

Ductless Mini-Split Heat Pump Comfort Evaluation  

SciTech Connect (OSTI)

Field tests were conducted in two homes in Austin, TX to evaluate the comfort performance of ductless mini-split heat pumps (DMSHPs), measuring temperature and relative humidity measurements in four rooms in each home before and after retrofitting a central HVAC system with DMSHPs.

Roth, K.; Sehgal, N.; Akers, C.

2013-03-01T23:59:59.000Z