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


1

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

2

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

3

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

4

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

5

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

6

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

7

Co-simulation of innovative integrated HVAC systems in buildings  

E-Print Network (OSTI)

Canada: International Building Perfor- mance SimulationExternal coupling between building energy simulation andexternal coupling of building energy and air ow modeling

Trcka, Marija

2010-01-01T23:59:59.000Z

8

Co-simulation of innovative integrated HVAC systems in buildings  

E-Print Network (OSTI)

Wetter, M. , 2009. Modelica-based Modeling and Simulation totools like TRNSYS or Modelica [http://www.modelica.org] have

Trcka, Marija

2010-01-01T23:59:59.000Z

9

Co-simulation of innovative integrated HVAC systems in buildings  

E-Print Network (OSTI)

Developing an Integrated Building Design Tool by Couplingdesign energy ecient building systems in this complex setting, integrated

Trcka, Marija

2010-01-01T23:59:59.000Z

10

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

11

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...

12

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

13

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

14

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

15

BS-8: HVAC Modeling and Simulation  

NLE Websites -- All DOE Office Websites (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

16

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

17

Heat recovery and the economizer for HVAC systems  

SciTech Connect

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

18

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

19

A Fault Detection and Diagnosis Method for HVAC Systems  

NLE Websites -- All DOE Office Websites (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

20

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

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

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

22

Building energy modeling programs comparison Research on HVAC systems  

NLE Websites -- All DOE Office Websites (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.

23

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

24

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

25

Simulation of a building and its HVAC system with an equation solver: Application to audit  

Science Journals Connector (OSTI)

A series of building energy simulation tools are being developed to help the building energy auditor in establishing his diagnosis (including benchmarking and detailed analysis of actual energy consumption) and i...

Stéphane Bertagnolio; Philippe Andre; Vincent Lemort

2010-06-01T23:59:59.000Z

26

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

27

Validation of a Building Simulation Tool Using Field Data for Three Identical Configuration Full-Serve Restaurants Using Different HVAC Systems  

E-Print Network (OSTI)

A new building application for a pre-existing HVAC software tool which calculates the benefits of desiccant-assisted HVAC equipment versus the performance of a standard vapor-compression system is used to model the monitored results, see Yborra...

Brillhart, P. L.; Worek, W. M.

2000-01-01T23:59:59.000Z

28

An implementation of co-simulation for performance prediction of innovative integrated HVAC systems in buildings  

E-Print Network (OSTI)

Developing an Integrated Building Design Tool by Couplingdesign energy efficient building systems in this complex setting, integrated

Trcka, Marija

2010-01-01T23:59:59.000Z

29

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

30

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

31

A PDI for your HVAC System  

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

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

32

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

33

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.

34

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

35

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

36

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

37

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

38

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.

39

Applications of HVAC System Utilizing Building Thermal Mass in Japan  

NLE Websites -- All DOE Office Websites (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.

40

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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...

42

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

43

Energy efficient HVAC system features thermal storage and heat recovery  

SciTech Connect

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

44

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

45

HVAC & Building Management Control System Energy Efficiency Replacements  

SciTech Connect

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

46

IFC HVAC interface to EnergyPlus - A case of expanded interoperability for energy simulation  

SciTech Connect

Tedious manual input of data that define a building, its systems and its expected pattern of use and operating schedules for building energy performance simulation has in the past diverted time and resources from productive simulation runs. In addition to its previously released IFCtoIDF utility that semiautomates the import of building geometry, the new IFC HVAC interface to EnergyPlus (released at the end of 2003) makes it possible to import and export most of the data that define HVAC equipment and systems in a building directly from and to other IFC compatible software tools. This reduces the manual input of other data needed for successful simulation with EnergyPlus to a minimum. The main purpose of this new interface is to enable import of HVAC equipment and systems definitions, generated by other IFC compatible software tools (such as HVAC systems design tools) and data bases, into EnergyPlus, and to write such definitions contained in EnergyPlus input files to the original IFC files from which building geometry was extracted for the particular EnergyPlus input. In addition, this interface sets an example for developers of other software tools how to import and/or export data other than building geometry from and/or into EnergyPlus. This paper describes the necessary simplifications and shortcuts incorporated in this interface, its operating environment, interface architecture, and the basic conditions and methodology for its use with EnergyPlus.

Bazjanac, Vladimir; Maile, Tobias

2004-03-29T23:59:59.000Z

47

Thermal model of solar absorption HVAC systems  

SciTech Connect

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

48

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

49

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

50

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.

51

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

52

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

53

A PDI for your HVAC System  

Energy.gov (U.S. Department of Energy (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?"

54

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

55

Comparisons of HVAC Simulations between EnergyPlus and DOE-2.2 for Data Centers  

SciTech Connect

This paper compares HVAC simulations between EnergyPlus and DOE-2.2 for data centers. The HVAC systems studied in the paper are packaged direct expansion air-cooled single zone systems with and without air economizer. Four climate zones are chosen for the study - San Francisco, Miami, Chicago, and Phoenix. EnergyPlus version 2.1 and DOE-2.2 version 45 are used in the annual energy simulations. The annual cooling electric consumption calculated by EnergyPlus and DOE-2.2 are reasonablely matched within a range of -0.4percent to 8.6percent. The paper also discusses sources of differences beween EnergyPlus and DOE-2.2 runs including cooling coil algorithm, performance curves, and important energy model inputs.

Hong, Tianzhen; Sartor, Dale; Mathew, Paul; Yazdanian, Mehry

2008-08-13T23:59:59.000Z

56

Review of Residential Low-Load HVAC Systems  

SciTech Connect

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

57

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

58

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

SciTech Connect

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

59

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

60

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

62

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.

63

Commissioning and Performance Diagnostics for HVAC Control Systems  

NLE Websites -- All DOE Office Websites (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

64

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

65

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

66

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

67

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

68

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

69

Development of an energy evaluation methodology to make multiple predictions of the HVAC&R system energy demand for office buildings  

Science Journals Connector (OSTI)

Abstract HVAC&R systems are the most energy consuming building services, representing approximately half of the final energy use in the building sector. Despite their significant energy use, there is a lack of a consistent and homogeneous framework to efficiently guide research, mainly due to the complexity and variety of HVAC&R systems, but also to insufficient rigor in their energy analysis. Quantifying the energy consumption characteristics of HVAC&R system is complicated, because the energy savings provided by this system depend on various factors. This research evaluates energy consumption characteristics of HVAC&R systems, with the aim of establishing a common idea for the analysis of building energy efficiency. The objective of this study is to develop an energy evaluation methodology and a simple simulation program that may be used by engineers and designers to assess the effectiveness and economic benefits of HVAC&R systems. Our approach deals with the concept of HVAC&R system energy use aggregation levels that are composed of subsystems. To carry out a techno-economical estimation of HVAC&R systems considering different types of subsystems, the matrix combination analyzed, and a total of 960 HVAC&R systems can be implemented for a large-scale office building. The methodology of energy analysis that was carried out in this study highlights how to plan and design toward utilizing the most effective HVAC&R systems.

Jinkyun Cho; Seungho Shin; Jonghurn Kim; Hiki Hong

2014-01-01T23:59:59.000Z

70

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

71

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

72

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.

73

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

74

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

75

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.

76

Plutonium Finishing Plant (PFP) HVAC System Component Index  

SciTech Connect

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

77

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.

78

Measuring rates of outdoor airflow into HVAC systems  

SciTech Connect

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

79

Outdoor airflow into HVAC systems: An evaluation of measurement  

NLE Websites -- All DOE Office Websites (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

80

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

82

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

83

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

84

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

85

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.

86

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

87

Automatic Control Technology in the HVAC System  

Science Journals Connector (OSTI)

In the field of VAV air-conditioning system (Variable Air Volume, VAV) control theory and practical study, the paper analyzed the methods used by the China's VAV control procedures including Static Pressure Control, Variable Pressure Control and Total ...

Ren Tao; Gao Jingmin; Jia Wenwen

2009-01-01T23:59:59.000Z

88

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

89

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

90

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

SciTech Connect

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

91

Energy Conservation Studies of Existing HVAC Systems  

E-Print Network (OSTI)

start and stop of air handling unit~ consists of controlling uni t operation based on the time of day and day of the week. This can be accomplished by time clock control at the air ' handler or central control from an automatic I system. This scheme... start and stop of air handling unit~ consists of controlling uni t operation based on the time of day and day of the week. This can be accomplished by time clock control at the air ' handler or central control from an automatic I system. This scheme...

Patterson, C. L.; Phelan, T. R.

92

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

93

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

94

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

95

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

96

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

97

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

98

Fabrication of A Quantum Well Based System for Truck HVAC  

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

99

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

100

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

102

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

103

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

104

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

105

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.

106

HVAC Market Study:  

NLE Websites -- All DOE Office Websites (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...

107

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.

108

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

109

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

110

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

111

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

112

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

113

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

114

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

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

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

115

Outdoor airflow into HVAC systems: An evaluation of measurement technologies  

SciTech Connect

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.

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

2003-09-01T23:59:59.000Z

116

HVAC Installed Performance  

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

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

117

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

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

Summarizes results from a study to identify and demonstrate technical and commercial approaches necessary to accelerate the deployment of zonal TE HVAC systems in light-duty vehicles

118

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

119

Optimized Fan Control In Variable Air Volume HVAC Systems Using Static Pressure Resets: Strategy Selection and Savings Analysis.  

E-Print Network (OSTI)

??The potential of static pressure reset (SPR) control to save fan energy in variable air volume HVAC systems has been well documented. Current research has… (more)

Kimla, John

2010-01-01T23:59:59.000Z

120

CFD simulation of leak in residential HVAC ducts  

Science Journals Connector (OSTI)

A three-dimensional computational fluid dynamics model was used to simulate fluid flow in a duct and its simulated leaks with six different air leak geometries placed respectively on its periphery. The k–? turbulence model for high Reynolds numbers flows was used for that purpose and the Reynolds numbers were varied to simulate a variety of flow conditions between 27,000 and 82,000. The computer code was used to produce pressure drop data and leak flow rates across the holes necessary to compute the pressure loss coefficients, as well as to produce flow field and static pressure plots that offer insight into the physics of the flow field. The flow coefficient and pressure exponent (C and n) were found for different leak geometries by curve fitting the pressure and leak flow data derived from CFD simulations and were compared to available data in the literature.

Samir Moujaes; Radhika Gundavelli

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

122

MAPPING HVAC SYSTEMS FOR SIMULATION IN ENERGYPLUS  

E-Print Network (OSTI)

apps1.eere.energy.gov/buildings/energyplus/. Modelica, 2012.Modelica andthe Modelica Association — Modelica Association [WWW

Basarkar, Mangesh

2013-01-01T23:59:59.000Z

123

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

124

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

125

Development Practice in HVAC Controls  

NLE Websites -- All DOE Office Websites (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

126

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

127

Modelica-based Modeling and Simulation to Support Research and Development in Building Energy and Control Systems  

E-Print Network (OSTI)

applied earlier for building energy modeling applicationstowards building HVAC system modeling and simulation. Forof equation-based modeling for building systems. We believe

Wetter, Michael

2010-01-01T23:59:59.000Z

128

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

129

Residential commissioning to assess envelope and HVAC system performance  

SciTech Connect

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

130

The Optimization of Control Parameters for VAV HVAC System Commissioning  

E-Print Network (OSTI)

, Menlo Park, CA. [6] L. Ljung 1995, ?System Identification Toolbox ? For Use with MATLAB 3rd ed, The MATH WORKS Inc, Natich, MA. [7] SIMULINK-Dynamic System Simulation for MATLAB-Using Simulink Ver.4, 2000, The MATH WORKS Inc, Natich, MA. ..., Menlo Park, CA. [6] L. Ljung 1995, ?System Identification Toolbox ? For Use with MATLAB 3rd ed, The MATH WORKS Inc, Natich, MA. [7] SIMULINK-Dynamic System Simulation for MATLAB-Using Simulink Ver.4, 2000, The MATH WORKS Inc, Natich, MA. ...

Song, S.; Maehara, K.; Sagara, N.

2006-01-01T23:59:59.000Z

131

System-Level Monitoring and Diagnosis of Building HVAC System  

E-Print Network (OSTI)

695. [50] M. Wetter, Modelica-based modelling and simulationhave been working on Modelica and EnergyPlus simulation59], DOE-2, TRANSYS, Modelica [50], etc. make use of the

Wu, Siyu

2013-01-01T23:59:59.000Z

132

Modeling and Measurement Constraints in Fault Diagnostics for HVAC Systems Massieh Najafi1  

E-Print Network (OSTI)

of the building's air conditioning units from reaching occupied spaces, so this unit's energy is simply wastedModeling and Measurement Constraints in Fault Diagnostics for HVAC Systems Massieh Najafi1 , David, Lawrence Berkeley National Laboratory, mdsohn@lbl.gov ABSTRACT Many studies have shown that energy savings

133

Building Energy Software Tools Directory: HVAC 1 Toolkit  

NLE Websites -- All DOE Office Websites (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.

134

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group at Oklahoma State University (www.hvac.okstate.edu)  

E-Print Network (OSTI)

at Oklahoma State University (www.hvac.okstate.edu) The correct citation for the paper is: Rees, S.J., J cooling loads is of critical concern to designers of HVAC systems. The work reported here has been carried of the HVAC industry worldwide would be improved if common methods of performing key design calculations were

Ghajar, Afshin J.

135

A Simple Path Loss Prediction Model for HVAC Systems O. K. Tonguz, D. D. Stancil, A. E. Xhafa, A. G. Cepni, P. V. Nikitin  

E-Print Network (OSTI)

1 A Simple Path Loss Prediction Model for HVAC Systems O. K. Tonguz, D. D. Stancil, A. E. Xhafa, A, and air conditioning (HVAC) cylindrical ducts in 2.4-2.5 GHz frequency band. The model we propose predicts the average power loss between a transmitter-receiver pair in an HVAC duct network. This prediction model

Stancil, Daniel D.

136

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

137

Optimized Fan Control In Variable Air Volume HVAC Systems Using Static Pressure Resets: Strategy Selection and Savings Analysis  

E-Print Network (OSTI)

The potential of static pressure reset (SPR) control to save fan energy in variable air volume HVAC systems has been well documented. Current research has focused on the creation of reset strategies depending on specific system features...

Kimla, John

2010-07-14T23:59:59.000Z

138

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

139

Integrated Ice Storage/Sprinkler HVAC System Sharply Cuts Energy Costs and Air-Distribution First Costs  

E-Print Network (OSTI)

Integrated ice thermal storage/sprinkler HVAC systems developed and applied by the author in several commercial applications shift a major portion of electric utility demand to cheaper off-peak hours, while also reducing significantly the first cost...

Meckler, G.

1986-01-01T23:59:59.000Z

140

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

Proceedings of Healthy Buildings 2009 Paper 680 Do forced air HVAC systems have a role in healthy homes?  

E-Print Network (OSTI)

Proceedings of Healthy Buildings 2009 Paper 680 Do forced air HVAC systems have a role in healthy-extreme weather conditions. #12;Proceedings of Healthy Buildings 2009 Paper 680 Thus, a central forced air

Siegel, Jeffrey

142

Post-Retrocommissioning HVAC Operations Monitoring Using Enterprise-Wide energy Management System  

E-Print Network (OSTI)

Post-retrocommissioning HVAC Operations Monitoring Using Enterprise-wide Energy Management System Narendra Amarnani Project Manager Brian Roberts Section Manager County of Los Angeles – ISD Los Angeles, California, USA Howard Choy... earned a graduate degree from Cal Poly University, Pomona. He is a Certified Energy Manager, a LEED® AP, and a Certified Energy Plan Examiner. Brian’s is the Section Manager of the Systems Section within Energy Management Division. His...

Amarnani, N.; Roberts, B.; Choy, H.

2007-01-01T23:59:59.000Z

143

Comparative guide to emerging diagnostic tools for large commercial HVAC systems  

SciTech Connect

This guide compares emerging diagnostic software tools that aid detection and diagnosis of operational problems for large HVAC systems. We have evaluated six tools for use with energy management control system (EMCS) or other monitoring data. The diagnostic tools summarize relevant performance metrics, display plots for manual analysis, and perform automated diagnostic procedures. Our comparative analysis presents nine summary tables with supporting explanatory text and includes sample diagnostic screens for each tool.

Friedman, Hannah; Piette, Mary Ann

2001-05-01T23:59:59.000Z

144

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

145

A new modelling methodology to control HVAC systems  

Science Journals Connector (OSTI)

Thermal comfort plays an important role in any working environment, but it is a very vague term and it is also very difficult to represent it on modern computers. Its proper definition could be a condition of the mind which expresses satisfaction with the thermal environment and, therefore, it depends on the individual’s physiology and psychology. Several researchers have investigated the relationships between room conditions and thermal comfort. Generally speaking, statistical approaches had been used whereas fuzzy and neural approaches have been recently proposed. In this work it is proposed a new thermal comfort model based on the P.O. Fanger PMV index according to the Institute of the University of Kansas and it has been adapted to a specific indoor ambience with a thermal comfort logger. The results showed that this methodology puts forward an adequate accuracy and suggests temperatures according to the present HVAC standards and those adaptive models show adequate values for thermal neutralities even though they are not suitable for energy saving due to its static value on a daily basis.

José A. Orosa

2011-01-01T23:59:59.000Z

146

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

147

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

148

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

149

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

150

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.

151

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

152

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

153

Proposal to negotiate an amendment to an existing contract for the supply and installation of an HVAC system for the HIE-ISOLDE infrastructure  

E-Print Network (OSTI)

Proposal to negotiate an amendment to an existing contract for the supply and installation of an HVAC system for the HIE-ISOLDE infrastructure

2014-01-01T23:59:59.000Z

154

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

155

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

SciTech Connect

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

156

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

157

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

NLE Websites -- All DOE Office Websites (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.

158

Methodology to Analyze the Sensitivity of Building Energy Consumption to HVAC System Sensor Error  

E-Print Network (OSTI)

Siemens TR 200/300 1 yr. (Siemens) GE Sensing Telaire 7000 1 yr.(GE-B,2011) 2.5.2 Pressure Sensors Based on the review of the manufacturers? specification literature, the most commonly used pressure sensors in HVAC systems are piezoresistive pressure... divided by the pump efficiency. Wpump=Wfluid/Effpump (42) Wpump(hp)=V(gal/min) ?Ptotal(ft-H2O)/(3960(gal-ft/min-hp)*Effpump) (43) The total pressure drop through the piping system includes the difference in static pressure of the inlet and outlet...

Ma, Liang

2012-02-14T23:59:59.000Z

159

NETL Sorbents Licensed to Help Lower Power Draw of HVAC  

NLE Websites -- All DOE Office Websites (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...

160

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

SciTech Connect

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

Multi-Sensor Single-Actuator Control of HVAC Systems  

E-Print Network (OSTI)

to replace the single sensor in one room with a network of sensors having at least one sensor per room. This paper addresses this multi-sensor, single-actuator control problem. We used computer simulations and optimization to study the problem. We designed a...

Lin, C.; Auslander, D.; Federspiel, C.

2002-01-01T23:59:59.000Z

162

Air filters from HVAC systems as possible source of volatile organic compounds (VOC) – laboratory and field assays  

Science Journals Connector (OSTI)

The emission of volatile organic compounds (VOC) from air filters of HVAC systems was to be evaluated. In a first study carbonyl compounds (14 aldehydes and two ketones) were measured by reacting them with 2,4-dinitrophenylhydrazine (DNPH). Analysis was done by HPLC and UV detection. In laboratory experiments pieces of used and unused HVAC filters were incubated in test chambers. Filters to be investigated were taken from a filter bank of a large HVAC system in the centre of Berlin. First results show that – among those compounds – formaldehyde and acetone were found in higher concentrations in the test chambers filled with used filters in comparison to those with unused filters. Parallel field measurements were carried out at the prefilter and main filter banks of the two HVAC systems. Here measurements were carried out simultaneously before and after the filters to investigate whether those aldehydes or ketones arise from the filter material on site. Formaldehyde and acetone significantly increased in concentration after the filters of one HVAC system. In parallel experiments microorganisms were proved to be able to survive on air filters. Therefore, a possible source of formaldehyde and acetone might be microbes.

Hans Schleibinger; Henning Rüden

1999-01-01T23:59:59.000Z

163

Comparison of Building Energy Modeling Programs: HVAC Systems  

E-Print Network (OSTI)

Four Pipe Fan Coil; Four Pipe Induction Unit; Heating andTwo Pipe Fan Coil; Two Pipe Induction Unit; Unit Heater;units (AHUs) – four CAV systems, four VAV systems, and one fan coil

Zhou, Xin

2014-01-01T23:59:59.000Z

164

Case Study of an Innovative HVAC System with Integral Dehumidifier  

E-Print Network (OSTI)

prototype air conditioning/dehumidification system was initiated and focused on integrating a standalone room air dehumidifier and a conventional residential air handler into a single package. Potential benefits of the integrated system include lower... and construction of the prototype unit and the laboratory and field tests that were performed to evaluate the performance of the prototype system. Further details are available in the final task report (Raustad et al. 2007). PROTOTYPE CONSTRUCTION...

Shirey, D. B.; Raustad, R. A.

165

Decentralized model predictive control of a multiple evaporator HVAC system  

E-Print Network (OSTI)

Vapor compression cooling systems are the primary method used for refrigeration and air conditioning, and as such are a major component of household and commercial building energy consumption. Application of advanced control techniques...

Elliott, Matthew Stuart

2009-05-15T23:59:59.000Z

166

Comparison of emerging diagnostic tools for large commercial HVAC systems  

SciTech Connect

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

167

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

168

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

169

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

170

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

171

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

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

172

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

173

Proper Setup of HVAC System in Conjunction with Sound Building 'Skin' Design for Alleviation of IAQ and Energy Performance Problems  

E-Print Network (OSTI)

climates, not only because of the loss of energy, but also because of damage that can result to insulation, drywall, and structure in addition to promotion of mold and mildew growth. Proper setup of the HVAC system, in conjunction with sound building “skin...

Rosenberg, M.

2006-01-01T23:59:59.000Z

174

A comparative study on energy consumption for HVAC systems of high-tech \\{FABs\\}  

Science Journals Connector (OSTI)

The unique system dynamics of five different HVAC designs including the RCU (recirculation air unit) system, the MAU (make-up air unit) + RCU system, the MAU + RCU + FCU (fan coil unit) system, the MAU + axial fan system, and the MAU + FFU (fan-filter unit) system for a typical 200 mm DRAM wafer fabrication plant are discussed and compared. The energy performances of the RCU system, the MAU + RCU system, the MAU + RCU + FCU system, and the MAU + axial fan system are 3.8, 1.19, 1.12 and 1.08, respectively, folds that of the most efficient MAU + FFU system. The MAU + axial fan system exhibits slight less efficient in energy performance, compared with the MAU + FFU system. The most influential factor on energy performance between these two systems is the design of the noise abatement system, especially the pressure drop of the silencer, which dominates almost half of the internal static pressure of axial fan. When the static pressure of silencer of the MAU + axial fan system is reduced to 50 Pa, energy consumption of these two systems is comparable. Bypassing a certain portion of FAB return air to mix with make-up air can maximally reduce 50% of energy consumption of the RCU system.

Shih-Cheng Hu; Jhy-Ming Tsao

2007-01-01T23:59:59.000Z

175

HVAC Improvements for Existing Houses  

NLE Websites -- All DOE Office Websites (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

176

Strategy Guideline: HVAC Equipment Sizing  

SciTech Connect

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

177

Dust loading on electrostatitically charged filters in a standard test and a real HVAC system  

Science Journals Connector (OSTI)

The efficiency and pressure drop of filters made from synthetic fibres carrying electrostatic charges and filters made from uncharged glass fibres were measured repeatedly for more than 19 weeks in operating HVAC systems. Results showed efficiency reductions as large as 40% for the filters made from charged fibres whereas the efficiency of filters made from uncharged fibres changed little. Clean filters were sent to a testing laboratory for efficiency measurements according to ASHRAE Standard 52.2-1999. When the filters experienced accelerated dust loading according to the ASHRAE procedure, the efficiency of both the glass and synthetic fibre filters increased. Efficiency reductions like those observed for the charged filters during actual use were not replicated by this standard test.

Peter C. Raynor; Soo Jae Chae

2003-01-01T23:59:59.000Z

178

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

179

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

180

Airflow regulation in variable-speed systems for residential HVAC applications  

SciTech Connect

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

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

182

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

183

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

184

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

185

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

186

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

SciTech Connect

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

187

HVAC Technician | Princeton Plasma Physics Lab  

NLE Websites -- All DOE Office Websites (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

188

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

189

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

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

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...

190

Modeling and Simulation of HVAC Faulty Operations and Performance Degradation due to Maintenance Issues  

E-Print Network (OSTI)

challenges of modeling building maintenance issues usinguse, Building simulation, EnergyPlus, Fault modeling, HVACbuildings in various climates, and developing modeling

Wang, Liping

2014-01-01T23:59:59.000Z

191

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

192

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

193

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group at Oklahoma State University (www.hvac.okstate.edu)  

E-Print Network (OSTI)

at Oklahoma State University (www.hvac.okstate.edu) The correct citation for the paper is: Xiao, D., J) and may become part of the ASHRAE standard method of test for whole building energy simulation programs (ASHRAE Standard 140). The existing test suite is comprised of tests that use a single building zone

194

Modeling and Simulation of HVAC Faulty Operations and Performance Degradation due to Maintenance Issues  

E-Print Network (OSTI)

offset Control sensors such as supply air temperature (SAT)a designed supply air temperature to control is 13?C, theSupply air temperature sensor (SAT) offset Impacts Simulated Scenarios Direct modeling, adjust SAT setpoint controls,

Wang, Liping

2014-01-01T23:59:59.000Z

195

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

196

An evaluation of technologies for real-time measurement of rates of outdoor airflow into HVAC systems  

SciTech Connect

During the last few years, new technologies have been introduced for real-time continuous measurement of 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 a controlled evaluation of these measurement technologies. The results of tests of four commercially available measurement technologies and one prototype based on a new design are also summarized. The test system and protocol were judged practical and very useful. The series of tests identified three commercially available measurement technologies that should provide reasonably accurate measurements of OA flow rates as long as air velocities are maintained high enough to produce accurately measurable pressure signals. In HVAC systems with economizer controls, to maintain the required air velocities the OA intake will need to be divided into two sections in parallel, each with a separate OA damper. The errors in OA flow rates measured with the fourth commercially available measurement technology were 20% to 30% with horizontal probes but much larger with vertical probes. The new prototype measurement technology was the only one that appears suitable for measuring OA flow rates over their full range from 20% OA to 100% OA without using two separate OA dampers. All of the measurement devices had pressure drops that are likely to be judged acceptable. The influence of wind on the accuracy of these measurement technologies still needs to be evaluated.

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

2004-09-01T23:59:59.000Z

197

An evaluation of three commercially available technologies forreal-time measurement of rates of outdoor airflow into HVAC systems  

SciTech Connect

During the last few years, new technologies have been introduced for real-time continuous measurement of the flow rates of outdoor air (OA) into HVAC systems; however, an evaluation of these measurements technologies has not previously been published. This document describes a test system and protocols developed for a controlled evaluation of these measurement technologies. The results of tests of three commercially available measurement technologies are also summarized. The test system and protocol were judged practical and very useful. The three commercially available measurement technologies should provide reasonably, e.g., 20%, accurate measurements of OA flow rates as long as air velocities are maintained high enough to produce accurately measurable pressure signals. In HVAC systems with economizer controls, to maintain the required air velocities the OA intake will need to be divided into two sections in parallel, each with a separate OA damper. All of the measurement devices had pressure drops that are likely to be judged acceptable. The influence of wind on the accuracy of these measurement technologies still needs to be evaluated.

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

2004-10-28T23:59:59.000Z

198

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

199

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

200

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.

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

202

Commercial Building HVAC: How it Affects People  

NLE Websites -- All DOE Office Websites (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.

203

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

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

204

HVAC Maintenance and Technologies  

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

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

205

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

206

Evaluation of commercially available techniques and development of simplified methods for measuring grille airflows in HVAC systems  

SciTech Connect

In this report, we discuss the accuracy of flow hoods for residential applications, based on laboratory tests and field studies. The results indicate that commercially available hoods are often inadequate to measure flows in residential systems, and that there can be a wide range of performance between different flow hoods. The errors are due to poor calibrations, sensitivity of existing hoods to grille flow non-uniformities, and flow changes from added flow resistance. We also evaluated several simple techniques for measuring register airflows that could be adopted by the HVAC industry and homeowners as simple diagnostics that are often as accurate as commercially available devices. Our test results also show that current calibration procedures for flow hoods do not account for field application problems. As a result, organizations such as ASHRAE or ASTM need to develop a new standard for flow hood calibration, along with a new measurement standard to address field use of flow hoods.

Walker, Iain S.; Wray, Craig P.; Guillot, Cyril; Masson, S.

2003-08-01T23:59:59.000Z

207

Free-cooling: A total HVAC design concept  

SciTech Connect

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

208

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

209

HVAC Maintenance and Technologies  

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

210

Methodology for design, calibration, system identification and operation of an experimental Hvac system.  

E-Print Network (OSTI)

??It is well known that building control systems rarely function as designed, contributing to excessive energy use and poor environmental control performance. In addition, most… (more)

Cui, Li

2013-01-01T23:59:59.000Z

211

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

212

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

213

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

214

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

215

HVAC Efficiency Controls Could Mean Significant Savings | Department of  

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

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

216

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.

217

Modeling of Solar-Powered Single-Effect Absorption Cooling System and Supermarket Refrigeration/HVAC System.  

E-Print Network (OSTI)

??This thesis consists of two different research problems. In the first one, the aim is to model and simulate a solar-powered, single-effect, absorption refrigeration system… (more)

Bahman, Ammar

2011-01-01T23:59:59.000Z

218

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

SciTech Connect

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

219

System Effects of High Efficiency Filters in Homes  

E-Print Network (OSTI)

FIELD TESTING OF FILTER IMPACTS ON HVAC SYSTEM PERFORMANCEof Filters in Residential and Light-Commercial HVAC systems.HVAC system performance changes with different MERV filters

Walker, Iain S.

2014-01-01T23:59:59.000Z

220

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

Modeling and Optimal Control Algorithm Design for HVAC Systems in Energy Efficient Buildings  

E-Print Network (OSTI)

Litz. Simulation of thermal building behaviour in modelica.of the 2nd International Modelica Conference, volume 154.building behaviour using Modelica. Mathematical and Computer

Maasoumy, Mehdi

2014-01-01T23:59:59.000Z

222

Simulating a Nationally Representative Housing Sample Using EnergyPlus  

E-Print Network (OSTI)

s HVAC system ductwork by relating the static pressure toand static pressure. In order to model more efficient HVAC

Hopkins, Asa S.

2011-01-01T23:59:59.000Z

223

Wireless Infrastructure for Performing Monitoring, Diagnostics, and Control HVAC and Other Energy-Using Systems in Small Commercial Buildings  

SciTech Connect

This project focused on developing a low-cost wireless infrastructure for monitoring, diagnosing, and controlling building systems and equipment. End users receive information via the Internet and need only a web browser and Internet connection. The system used wireless communications for: (1) collecting data centrally on site from many wireless sensors installed on building equipment, (2) transmitting control signals to actuators and (3) transmitting data to an offsite network operations center where it is processed and made available to clients on the Web (see Figure 1). Although this wireless infrastructure can be applied to any building system, it was tested on two representative applications: (1) monitoring and diagnostics for packaged rooftop HVAC units used widely on small commercial buildings and (2) continuous diagnosis and control of scheduling errors such as lights and equipment left on during unoccupied hours. This project developed a generic infrastructure for performance monitoring, diagnostics, and control, applicable to a broad range of building systems and equipment, but targeted specifically to small to medium commercial buildings (an underserved market segment). The proposed solution is based on two wireless technologies. The first, wireless telemetry, is used for cell phones and paging and is reliable and widely available. This risk proved to be easily managed during the project. The second technology is on-site wireless communication for acquiring data from sensors and transmitting control signals. The technology must enable communication with many nodes, overcome physical obstructions, operate in environments with other electrical equipment, support operation with on-board power (instead of line power) for some applications, operate at low transmission power in license-free radio bands, and be low cost. We proposed wireless mesh networking to meet these needs. This technology is relatively new and has been applied only in research and tests. This proved to be a major challenge for the project and was ultimately abandoned in favor of a directly wired solution for collecting sensor data at the building. The primary reason for this was the relatively short ranges at which we were able to effectively place the sensor nodes from the central receiving unit. Several different mesh technologies were attempted with similar results. Two hardware devices were created during the original performance period of the project. The first device, the WEB-MC, is a master control unit that has two radios, a CPU, memory, and serves as the central communications device for the WEB-MC System (Currently called the 'BEST Wireless HVAC Maintenance System' as a tentative commercial product name). The WEB-MC communicates with the local mesh network system via one of its antennas. Communication with the mesh network enables the WEB-MC to configure the network, send/receive data from individual motes, and serves as the primary mechanism for collecting sensor data at remote locations. The second antenna enables the WEB-MC to connect to a cellular network ('Long-Haul Communications') to transfer data to and from the NorthWrite Network Operations Center (NOC). A third 'all-in-one' hardware solution was created after the project was extended (Phase 2) and additional resources were provided. The project team leveraged a project funded by the State of Washington to develop a hardware solution that integrated the functionality of the original two devices. The primary reason for this approach was to eliminate the mesh network technical difficulties that severely limited the functionality of the original hardware approach. There were five separate software developments required to deliver the functionality needed for this project. These include the Data Server (or Network Operations Center), Web Application, Diagnostic Software, WEB-MC Embedded Software, Mote Embedded Software. Each of these developments was necessarily dependent on the others. This resulted in a challenging management task - requiring high bandwidth communications among

Patrick O'Neill

2009-06-30T23:59:59.000Z

224

HVAC Installed Performance  

Energy.gov (U.S. Department of Energy (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?"

225

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

226

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

227

Chapter 5: Lighting, HVAC, and Plumbing  

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

: 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

228

Remote Fault Detection of Building HVAC System Using a Global Optimization Program  

E-Print Network (OSTI)

the simulation program in conjunction with synthetic measured data to identify faults in the building operation. This fault detection approach has successfully identified all of the faulty parameters with noise levels of 1%, 3% and 6%. It successfully detected...

Lee, S. U.; Claridge, D. E.

2004-01-01T23:59:59.000Z

229

Origins of Analysis Methods in Energy Simulation Programs Used for High Performance Commercial Buildings  

E-Print Network (OSTI)

Current designs of high performance buildings utilize hourly building energy simulations of complex, interacting systems. Such simulations need to quantify the benefits of numerous features including: thermal mass, HVAC systems and, in some cases...

Oh, Sukjoon

2013-08-19T23:59:59.000Z

230

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

231

A Method for Simulating Heat Recovery Systems Using AirModel in Implementations of the ASHRAE Simplified Energy Analysis Procedure  

E-Print Network (OSTI)

exchanger to verify the return air ratio. In this comparison, the recovered energy from the return air was equalized with the heat transfer of the heat exchanger model. An example of this methodology was used to simulate the HVAC system with a heat... to be measured for further investigation to verify the AirModel simulation. This method can be applied in Energy Plus and other simulation tools/software to simulate the building exhaust energy recovery. Acknowledgements The work of this paper...

Liu, C.; Zeig, M.; Claridge, D. E.; Wei, G.; Bruner, H.; Turner, W. D.

2005-01-01T23:59:59.000Z

232

Commercial thermal distribution systems, Final report for CIEE/CEC  

E-Print Network (OSTI)

air-volume HVAC systems, static pressures across theIn VAY HVAC systems, the static pressures may likely changefor the Static Pressure Analysis Tool are: • HVAC schedule

Xu, T.

2011-01-01T23:59:59.000Z

233

ASHRAE Transactions: Symposia 1107 The interest in both modular simulation and alternative  

E-Print Network (OSTI)

model HVAC systems that are different from the "standard" systems that one tends to encounter in most simulationsallowprogramuserstotestoutconfigurationsthat are different from the standard systems and may sometimes lead to innovative design solutions, EnergyPlus. Its integration of a modular HVAC simulation within the framework of a comprehensive building

234

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

235

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.

236

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

237

Improving efficiency of a vehicle HVAC system with comfort modeling, zonal design, and thermoelectric devices  

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

Discusses progress on thermal comfort modeling and detailed design, fabrication, and component/system-level testing of TE architecture

238

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)

239

Development of a Thermoelectric Device for an Automotive Zonal HVAC System  

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

Presents development of a thermoelectric device using liquid working fluid on the waste? side and air as working fluid on the main? side to enable zonal or distributed heating/cooling systems within a vehicle

240

A BEMS-Assisted Commissioning Tool to Improve the Energy Performance of HVAC Systems  

E-Print Network (OSTI)

The evolving capabilities of Building Energy Management Systems (BEMS) offer new opportunities to automate some parts of the commissioning process and can generate benefits over the entire life of a building. These benefits include a reduction...

Choiniere, D.; Corsi, M.

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

242

Analysis of the Design of an HVAC System in a Public Building  

E-Print Network (OSTI)

to west, 2.5 meters high, 1560 m2 in area, fire resistant rating, with four exists. It is planed the reconstructed as a public building with the function of amusement, recreation and performance, so the air conditioning system is necessary...

Wei, P.; Shao, Z.; Chen, H.

2006-01-01T23:59:59.000Z

243

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

244

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

SciTech Connect

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

245

Simulation of energy performance of underfloor air distribution (UFAD) systems  

E-Print Network (OSTI)

system represents a fan coil unit (FCU) system, consistingEnergy use intensity EUI Fan coil unit F CU HVAC electricityarea Fan powered terminal unit (with heating coil) used for

2009-01-01T23:59:59.000Z

246

HVAC-systems.  

E-Print Network (OSTI)

?? It is of interest for companies to keep the annual operating cost of their buildings as low as possible. A substantial share of the… (more)

Alvsvåg, Øyvind

2011-01-01T23:59:59.000Z

247

VOLUME 11, NUMBER 4 HVAC&R RESEARCH OCTOBER 2005 A Model for Annual Simulation of Standing  

E-Print Network (OSTI)

wells. An approach that uti- lizes an "enhanced" thermal conductivity to account for the natural ­ Standing column well (SCW) systems, which utilize a single well for both extraction and injection of groundwater ­ Open-loop groundwater systems with separate extraction and injection wells or single extraction

248

Columbia Water and Light- Residential HVAC Rebate Program  

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

249

EECBG Success Story: HVAC Upgrade Saving Money, Protecting History  

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

250

The Impact of Uncertain Physical Parameters on HVAC Demand Response  

SciTech Connect

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

251

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

252

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

253

A New Model to Simulate Energy Performance of VRF Systems  

SciTech Connect

This paper presents a new model to simulate energy performance of variable refrigerant flow (VRF) systems in heat pump operation mode (either cooling or heating is provided but not simultaneously). The main improvement of the new model is the introduction of the evaporating and condensing temperature in the indoor and outdoor unit capacity modifier functions. The independent variables in the capacity modifier functions of the existing VRF model in EnergyPlus are mainly room wet-bulb temperature and outdoor dry-bulb temperature in cooling mode and room dry-bulb temperature and outdoor wet-bulb temperature in heating mode. The new approach allows compliance with different specifications of each indoor unit so that the modeling accuracy is improved. The new VRF model was implemented in a custom version of EnergyPlus 7.2. This paper first describes the algorithm for the new VRF model, which is then used to simulate the energy performance of a VRF system in a Prototype House in California that complies with the requirements of Title 24 ? the California Building Energy Efficiency Standards. The VRF system performance is then compared with three other types of HVAC systems: the Title 24-2005 Baseline system, the traditional High Efficiency system, and the EnergyStar Heat Pump system in three typical California climates: Sunnyvale, Pasadena and Fresno. Calculated energy savings from the VRF systems are significant. The HVAC site energy savings range from 51 to 85percent, while the TDV (Time Dependent Valuation) energy savings range from 31 to 66percent compared to the Title 24 Baseline Systems across the three climates. The largest energy savings are in Fresno climate followed by Sunnyvale and Pasadena. The paper discusses various characteristics of the VRF systems contributing to the energy savings. It should be noted that these savings are calculated using the Title 24 prototype House D under standard operating conditions. Actual performance of the VRF systems for real houses under real operating conditions will vary.

Hong, Tianzhen; Pang, Xiufeng; Schetrit, Oren; Wang, Liping; Kasahara, Shinichi; Yura, Yoshinori; Hinokuma, Ryohei

2014-03-30T23:59:59.000Z

254

Modeling of Solar-Powered Single-Effect Absorption Cooling System and Supermarket Refrigeration/HVAC System.  

E-Print Network (OSTI)

?? This thesis consists of two different research problems. In the first one, the aim is to model and simulate a solar-powered, single-effect, absorption refrigeration… (more)

Bahman, Ammar Mohammad Khalil

2011-01-01T23:59:59.000Z

255

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

NLE Websites -- All DOE Office Websites (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...

256

Dynamic Simulation of a Superinsulated Residential Structure with a Hybrid Desiccant Cooling System.  

E-Print Network (OSTI)

??This thesis explores the efficiency and performance of residential HVAC systems applied to new high performance buildings which meet the standards of the Passivhaus movement.… (more)

O'Kelly, Matthew E.

2012-01-01T23:59:59.000Z

257

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

SciTech Connect

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

258

High-Speed Internet Access via HVAC Ducts: A New Approach Daniel D. Stancil, Ozan K. Tonguz, Ariton Xhafa, Ahmet Cepni, and Pavel Nikitin  

E-Print Network (OSTI)

High-Speed Internet Access via HVAC Ducts: A New Approach Daniel D. Stancil, Ozan K. Tonguz, Ariton conditioning (HVAC) ducts for indoor wireless transmission systems and networks. Mea- surements and system to 100 Mbps should be possible, when HVAC system is used in con- junction with OFDM technology. Keywords

Stancil, Daniel D.

259

Chapter 4, Small Commercial and Residential Unitary and Split System HVAC Cooling Equipment-Efficiency Upgrade Evaluation Protocol: The Uniform Methods Project: Methods for Determining Energy Efficiency Savings for Specific Measures  

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

4: Small Commercial 4: Small Commercial and Residential Unitary and Split System HVAC Cooling Equipment-Efficiency Upgrade Evaluation Protocol David Jacobson, Jacobson Energy Research Subcontract Report NREL/SR-7A30-53827 April 2013 The Uniform Methods Project: Methods for Determining Energy Efficiency Savings for Specific Measures 4 - 1 Chapter 4 - Table of Contents 1 Measure Description .............................................................................................................. 2 2 Application Conditions of Protocol ....................................................................................... 3 2.1 Programs with Enhanced Measures ................................................................................. 5 3 Savings Calculations .............................................................................................................. 6

260

Use of EMCS Recorded Data to Identify Potential Savings Due to Improved HVAC Operations & Maintenance (O&M)  

E-Print Network (OSTI)

Use of EMCS Recorded Data to Identify Potential Savings Due to Improved HVAC Operations & Maintenance(O&M) Mingsheng Liu, Yeqiao Zhu, and David Claridge Energy Systems Laboratory Texas A&M University ABSTRACT In most chiller and boiler central... and cooling energy consumption using an appropriate model [Liu 1995, Liu and Claridge 19951 with the bin weather data for each building. Step 5: Calculate the campus consumption as the sum of consumption of all buildings. Step 6: Compare the simulated...

Liu, M.; Zhu, Y.; Claridge, D. E.

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

262

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

263

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 51, NO. 5, MAY 2003 945 Propagation Model for the HVAC Duct as a  

E-Print Network (OSTI)

for the HVAC Duct as a Communication Channel Pavel V. Nikitin, Member, IEEE, Daniel D. Stancil, Senior Member (HVAC) ducts in buildings are typically hollow metal pipes which can be used as waveguides to carry such a communication system. This paper presents a propagation model for a straight HVAC duct terminated at both ends

Stancil, Daniel D.

264

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

265

A plug and play framework for an HVAC air handling unit and temperature sensor auto recognition technique.  

E-Print Network (OSTI)

??A plug and play framework for an HVAC air handling unit control system is proposed in this study. This is the foundation and the first… (more)

Zhou, Xiaohui

2010-01-01T23:59:59.000Z

266

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

267

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

NLE Websites -- All DOE Office Websites (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

268

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group at Oklahoma State University (www.hvac.okstate.edu)  

E-Print Network (OSTI)

at Oklahoma State University (www.hvac.okstate.edu) The correct citation for the paper is: Pedersen, C.O., D in the NBSLD program developed at the US National Bureau of Standards (now NIST) in the same time period of Standards (now NIST). The DOE eff

269

A Method for On-Going Commissioning of VRV Package Systems Using a Simulation Model  

E-Print Network (OSTI)

Variable refrigerant volume (VRV) systems, which have several indoor units and a single outdoor unit, have become very popular HVAC systems in Japan. However, some systems may be operated under inefficient conditions and consume excessive energy...

Yamaha, M.; Sekiyama, K.; Misaki, S.

2006-01-01T23:59:59.000Z

270

Best practices guide for residential HVAC Retrofits  

SciTech Connect

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

271

Model Predictive Control Approach to Online Computation of Demand-Side Flexibility of Commercial Buildings HVAC Systems for Supply Following  

E-Print Network (OSTI)

the summation of fan power, cooling power and heating power,non-electric heating and cooling powers of these systems. (time t Power consumption of fan, heating and cooling systems

Maasoumy, Mehdi

2014-01-01T23:59:59.000Z

272

Calibration and validation of a solar thermal system model in Modelica  

Science Journals Connector (OSTI)

Recent advancements in the domain of modeling physical processes offer opportunities to use equation based modeling environments, such as Modelica, for the simulation of building heating, ... (HVAC) systems. The ...

Giuliano Fontanella; Daniele Basciotti; Florian Dubisch…

2012-09-01T23:59:59.000Z

273

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

274

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

275

Indirect Benefits (Increased Roof Life and HVAC Savings) from a Solar PV System at the San José Convention Center  

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

The City of San José is considering the installation of a solar photovoltaic (PV) system on the roof of the San José Convention Center. The installation would be on a lower section of the roof covering approximately 21,000 ft2. To assist city staff in making a decision on the PV installation, the Department of Energy Tiger Team has investigated potential indirect benefits of installing a solar PV system on the Convention Center roof. The indirect benefits include potential increase in roof life, as well as potential reduced heating and cooling load in the building due to roof shading from the PV system.

276

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

277

Co-Simulation of Building Energy and Control Systems with the Building Controls Virtual Test Bed  

SciTech Connect

This article describes the implementation of the Building Controls Virtual Test Bed (BCVTB). The BCVTB is a software environment that allows connecting different simulation programs to exchange data during the time integration, and that allows conducting hardware in the loop simulation. The software architecture is a modular design based on Ptolemy II, a software environment for design and analysis of heterogeneous systems. Ptolemy II provides a graphical model building environment, synchronizes the exchanged data and visualizes the system evolution during run-time. The BCVTB provides additions to Ptolemy II that allow the run-time coupling of different simulation programs for data exchange, including EnergyPlus, MATLAB, Simulink and the Modelica modelling and simulation environment Dymola. The additions also allow executing system commands, such as a script that executes a Radiance simulation. In this article, the software architecture is presented and the mathematical model used to implement the co-simulation is discussed. The simulation program interface that the BCVTB provides is explained. The article concludes by presenting applications in which different state of the art simulation programs are linked for run-time data exchange. This link allows the use of the simulation program that is best suited for the particular problem to model building heat transfer, HVAC system dynamics and control algorithms, and to compute a solution to the coupled problem using co-simulation.

Wetter, Michael

2010-08-22T23:59:59.000Z

278

Empirical Methodologies for Improving HVAC Efficiency  

NLE Websites -- All DOE Office Websites (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

279

Simulation of energy performance of underfloor air distribution (UFAD) systems  

E-Print Network (OSTI)

13   Table 7. Summary of UFAD HVAC EUI and percen tagethe HVAC component energy use intensity (EUI) results. Theis site-based annual HVAC EUI (kBtu/ft 2 /yr). Two baseline

2009-01-01T23:59:59.000Z

280

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

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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...

282

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...

283

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

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

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...

284

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...

285

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

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

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,...

286

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

287

Coordinated Control of HVAC Systems  

E-Print Network (OSTI)

This paper describes the development of new control logic for starting and stopping energy-intensive equipment in buildings such as staged air-conditioning units. The concept is to use pulse-width modulation (PWM) instead of level-crossing logic. A...

Federspiel, C.; Lanning, S. D.; Li, H.; Auslander, D. M.

2001-01-01T23:59:59.000Z

288

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

289

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

290

Vehicle & Systems Simulation & Testing  

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

penetration of advanced vehicles and systems to displace petroleum consumption, reduce GHG emissions, and achieve vehicle electrification goals. Evaluate technology targets...

291

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

292

Variable Refrigerant Flow HVAC  

E-Print Network (OSTI)

Conference, San Antonio, Texas Dec. 16-18 What do they know that we don’t know? Japan 90% Over 7 Million Systems China 86% Over 17 Million Systems Europe 81% Over 7 Million Systems USA 4% .5 Million Systems ESL-KT-13-12-33 CATEE 2013: Clean Air Through...-source VRF IEER 11.5 - 17.7 19.6 9.7 10.3 10.9 10.5 IPLV - 14.2 - - SCHE - - 18.6 N/A Energy Efficiency - commercial EER ESL-KT-13-12-33 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 More Comfort & Quiet ? 4 ton...

Jones, S.

2013-01-01T23:59:59.000Z

293

Unusual HVAC challenges require innovative solutions  

SciTech Connect

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

294

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

295

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

296

Ventilation, temperature, and HVAC characteristics in small and medium  

NLE Websites -- All DOE Office Websites (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.

297

Vehicle & Systems Simulation & Testing | Department of Energy  

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

Vehicle & Systems Simulation & Testing Vehicle & Systems Simulation & Testing 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and...

298

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

299

Fuzzy control model and simulation of supply air system in a test rig of low-temperature hot-water radiator system  

Science Journals Connector (OSTI)

This paper proposes a typical multi-variable, large time delay and nonlinear system, self-extracting rules fuzzy control (SERFC) method to maintain a stable temperature value in a built environment chamber with supply air system and hot-water system. The parameters of the transfer functions in every control loop were identified by experimental data in a format of time sequences obtained from the experiment of dynamical responding performance. Fuzzy control simulations were implemented based on adjustment of the supply air system and hot-water system by SERFC. The simulation results show that SERFC for environment chamber has satisfied performance. There is no higher overshoot and stable error. The work presented in here can be used to deal with those complex thermal processes with difficulties in modeling of fuzzy control rules and provide a foundation for further application of fuzzy control in HVAC system.

Zhen Lu; Jili Zhang; Yongpan Chen; Tianyi Zhao; Hui Liu

2010-01-01T23:59:59.000Z

300

HVAC Optimized Heat Exchangers Research Project | Department of Energy  

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

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

302

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

303

HVAC Equipment Rebate Program | Department of Energy  

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

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

304

Recovery Act-Funded HVAC projects  

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

305

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

306

Non-Vapor Compression HVAC Technologies Report  

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

307

Building Technologies Office: HVAC Optimized Heat Exchangers Research  

NLE Websites -- All DOE Office Websites (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

308

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

309

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

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

In this project, BSC worked with the builder to develop a cost-effective design for moving the HVAC system into conditioned space and increase the energy performance of future production houses in anticipation of 2015 IECC codes.

310

Building Technologies Office: Recovery Act-Funded HVAC Research Projects  

NLE Websites -- All DOE Office Websites (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

311

Building Technologies Office: HVAC and Water Heater Field Tests Research  

NLE Websites -- All DOE Office Websites (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

312

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

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

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

313

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

314

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.

315

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.

316

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

317

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

318

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

319

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.

320

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

322

Energy conservation measures in an institutional building by dynamic simulation using designbuilder  

Science Journals Connector (OSTI)

In this study, various energy conservation measures (ECMs) on heating, ventilating and air conditioning (HVAC) and lighting systems for a 4-storied building in subtropical (hot and humid climate) Central Queensland, Australia are evaluated using the ... Keywords: designbuilder, energy conservation measures, energy efficient lighting and day light control, energy simulation, hot-humid climate, variable air volume system

M. M. Rahman; M. G. Rasul; M. M. K. Khan

2008-02-01T23:59:59.000Z

323

Utility System Simulation: A Nonlinear Approach  

E-Print Network (OSTI)

UTILITY SYSTEM SIMULATION: A NONLINEAR APPROACH STEPHEN R. DELK, P.E. Owner The MESA Company The Woodlands, Texas ABSTRACT Computer simulation of plant utility systems allows an engineer to rapidly I) analyze operation changes, 2...) analyze design changes, and 3) optimize the steam/electric system for the lowest operating cost. MESA (Modular Energy System Analyzer) is a PC-based computer program that can be configured to accurately simulate plant utility systems. MESA uses a...

Delk, S. R.

324

ThermoElectric Power System Simulator (TEPSS) | Department of...  

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

ThermoElectric Power System Simulator (TEPSS) ThermoElectric Power System Simulator (TEPSS) It describes the tool ThermoElectric Power System Simulator (TEPSS) which enables...

325

Comprehensive Simulation Framework for Power System Operation  

Science Journals Connector (OSTI)

The Electric Power and Communication Synchronizing Simulator (EPOCHS) [13, 14...] has been the first approach to combine simulators for power system and communication networks. Here, the authors connected the two...

Sven Christian Müller; Hanno Georg…

2014-01-01T23:59:59.000Z

326

Research & Development Roadmap: Emerging HVAC Technologies  

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

327

Thermal Simulation of Advanced Powertrain Systems  

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

Under this project, the Volvo complete vehicle model was modified to include engine and exhaust system thermal outputs and cooling system to enable WHR simulations from a system perspective.

328

Simulating quantum systems on a quantum computer  

Science Journals Connector (OSTI)

...A-eigenstates in the original system state. Also after each observation...1998) Simulating quantum systems on a quantum computer 321 system will be in an eigenstate of...the energy eigenstates. An analysis shows that the relative accuracy...

1998-01-01T23:59:59.000Z

329

INTEGRATED ENERGY SYSTEMS: PRODUCTIVITY & BUILDING SCIENCE  

E-Print Network (OSTI)

Integrated Design of Commercial Building Ceiling Systems Integrated Design of Residential Ducting & Air FlowINTEGRATED ENERGY SYSTEMS: PRODUCTIVITY & BUILDING SCIENCE Productivity and Interior Environments Integrated Design of Large Commercial HVAC Systems Integrated Design of Small Commercial HVAC Systems

330

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)

331

Nuclear Systems Modeling, Simulation & Validation | Nuclear Science...  

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

Research Areas Fuel Cycle Science & Technology Fusion Nuclear Science Isotope Development and Production Nuclear Security Science & Technology Nuclear Systems Modeling, Simulation...

332

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

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

333

Department of Energy and Mineral Engineering Spring 2013 Solar Innovations -HVAC and Waste Stream Analysis  

E-Print Network (OSTI)

included providing accurate floor plans and improve the system for improvement in indoor air qualityPENNSTATE Department of Energy and Mineral Engineering Spring 2013 Solar Innovations - HVAC areas and indoor air quality is below satisfactory. The waste stream was to be analysed to assess

Demirel, Melik C.

334

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group at Oklahoma State University (www.hvac.okstate.edu)  

E-Print Network (OSTI)

to air source heat pump systems, ground source systems have not been so widely used. This may. INTRODUCTION Ground source heat pump systems have become increas- ingly popular for both residential tools. In ground source heat pump systems, heat is extracted from or rejected to the ground via either

Ghajar, Afshin J.

335

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group at Oklahoma State University (www.hvac.okstate.edu)  

E-Print Network (OSTI)

efficient than conventional air-to-air systems. In practice, ground-source heat pump systems have also.J. Rees, and C. Yavuzturk. 2000. Recent Developments in Ground Source Heat Pump System Design, Modelling A28, p.34. #12;Page 1 of 1 Recent Developments in Ground Source Heat Pump System Design, Modeling

336

Method for simulating discontinuous physical systems  

DOE Patents (OSTI)

The mathematical foundations of conventional numerical simulation of physical systems provide no consistent description of the behavior of such systems when subjected to discontinuous physical influences. As a result, the numerical simulation of such problems requires ad hoc encoding of specific experimental results in order to address the behavior of such discontinuous physical systems. In the present invention, these foundations are replaced by a new combination of generalized function theory and nonstandard analysis. The result is a class of new approaches to the numerical simulation of physical systems which allows the accurate and well-behaved simulation of discontinuous and other difficult physical systems, as well as simpler physical systems. Applications of this new class of numerical simulation techniques to process control, robotics, and apparatus design are outlined.

Baty, Roy S. (Albuquerque, NM); Vaughn, Mark R. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

337

Wind Power System Simulation of Switch Control  

Science Journals Connector (OSTI)

In order to find a balance between energy efficiency and reliability of wind power generation system, this paper presents a ... switch control strategy. This paper establishes a wind power system simulation model...

Yuehua Huang; Guangxu Li; Huanhuan Li

2014-01-01T23:59:59.000Z

338

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

339

Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger  

NLE Websites -- All DOE Office Websites (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

340

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group at Oklahoma State University (www.hvac.okstate.edu)  

E-Print Network (OSTI)

-term temperature response of the ground. Energy consumption for this system is compared to that of a conventional performance and long-term temperature response of the ground. Energy consumption for this system is compared system with condensing gas boilers and vapor compression refrigeration. Introduction Ground source heat

Note: This page contains sample records for the topic "hvac systems simulation" 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

The simulation system SIMPLEX II  

E-Print Network (OSTI)

in the response of the model. Sensitivity analysis can determine regions of instability in the parameter range space and therefore point to parameters, which have to be estimated with increased care. Using a stochastic simulation model we will demonstrate how...

Schinagl, Josef Georg

1995-01-01T23:59:59.000Z

342

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

343

Pedernales Electric Cooperative - HVAC Rebate Program | Department of  

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

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:

344

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group at Oklahoma State University (www.hvac.okstate.edu)  

E-Print Network (OSTI)

trenches or vertical boreholes. The heat exchange fluid is usually water, brine, or an antifreeze solution and the soil/rock and prevents cross- contamination of groundwater. In nonresidential ground- coupled systems

345

Computer simulation of breathing systems for divers  

SciTech Connect

A powerful new tool for the analysis and design of underwater breathing gas systems is being developed. A versatile computer simulator is described which makes possible the modular ''construction'' of any conceivable breathing gas system from computer memory-resident components. The analysis of a typical breathing gas system is demonstrated using this simulation technique, and the effects of system modifications on performance of the breathing system are shown. This modeling technique will ultimately serve as the foundation for a proposed breathing system simulator under development by the Navy. The marriage of this computer modeling technique with an interactive graphics system will provide the designer with an efficient, cost-effective tool for the development of new and improved diving systems.

Sexton, P.G.; Nuckols, M.L.

1983-02-01T23:59:59.000Z

346

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group at Oklahoma State University (www.hvac.okstate.edu)  

E-Print Network (OSTI)

to eliminate or reduce dangerous driving conditions caused by snow and ice. The first important task in sizing of idling time, heating capacity, pipe spacing, bottom insulation, and control strategies on system snow through a pipe network embedded in the slab to melt snow and ice on the surface of the slab. The pipe

347

The new standard’s HVAC background noise requirements and their implementation in building design  

Science Journals Connector (OSTI)

The new ANSI classroom standard recommends long?term steady?state background sound level limits of 35 dBA and 55 dBC. Since the HVAC system is typically a room’s dominant steady?state noise source it is usually reasonable to apply these limits to the design of the system assuming that other noise sources produce insignificant additions to the room’s long?term background noise environment. The recommended sound level limits are significantly lower than current industry standards and complying with them will increase system costs. School administrators architects and HVAC system designers should therefore be prepared for the changes. This paper summarizes equipment selection and system design guidelines that have been found to be necessary for ensuring compliance with the sound level limits.

2001-01-01T23:59:59.000Z

348

Microsoft Word - HVAC_20100824.doc  

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

air-handling units, exhaust fans, and HEPA filters and design specifications to allow for remote operation. The system design comprises approximately 70 drawings, which are...

349

MODELING, ANALYSIS AND SIMULATION OF MULTIBODY SYSTEMS  

E-Print Network (OSTI)

painting device to the simulation of hundreds of mobile robots in a complex environment. Former "Graspees of multibody systems plays an important role in a wide range of fields, from robotics to computer animation

Plotkin, Joshua B.

350

Simulation of Spatial P system models  

Science Journals Connector (OSTI)

Spatial P systems are an extension of the P systems formalism in which objects and membranes are embedded into a two-dimensional discrete space. Spatial P systems are characterised by the distinction between ordinary objects and mutually exclusive objects, ... Keywords: Membrane computing, Simulation algorithms, Spatiality

Roberto Barbuti, Andrea Maggiolo-Schettini, Paolo Milazzo, Giovanni Pardini

2014-04-01T23:59:59.000Z

351

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

352

Columbia Water and Light - HVAC and Lighting Efficiency Rebates |  

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

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

353

HVAC Right-Sizing Part 1: Calculating Loads  

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

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

354

Logistics systems modeling and simulation  

Science Journals Connector (OSTI)

Modern logistics systems are much more than simply networks of material flow. They involve collaboration between firms that are also competitors. The supply chain can be a key consideration in product design, with its design and operations influenced ...

George Thiers; Leon McGinnis

2011-12-01T23:59:59.000Z

355

VARIABLE SPEED INTEGRATED INTELLIGENT HVAC BLOWER  

SciTech Connect

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

356

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

357

Thermal simulation and system optimization of a chilled ceiling coupled with a floor containing a phase change material (PCM)  

Science Journals Connector (OSTI)

Abstract The integration of phase change materials (PCMs) for cooling applications in buildings reduces the amplitude of indoor air temperature fluctuations due to solar and internal gains, enabling passive solar, HVAC system downsizing or off-peak cooling designs. This work studies the use of radiant systems for discharging heat stored in a PCM; this approach differs from the typical practice of accomplishing this task by either night cooling ventilation or embedding an active heat exchanger into the PCM of the wall. In this study, a PCM is incorporated into the floor, and a hydronic radiant ceiling system is used as the energy discharge system. The advantages and disadvantages of this configuration in terms of cooling energy demands and thermal comforts of occupants are analyzed using the simulation software TRNSYS®. Five design parameters are optimized using the software GENOPT®. The simulation reveals that when accompanied by an air-to-air heat recovery system, this configuration can significantly reduce the cooling energy demand (more than 50% compared to the cooling energy demand of the same building without PCM) and can thus significantly reduce the energy consumption. However, the degrees of occupant comfort will inevitably vary (i.e., the predicted percent dissatisfied (PPD) increases by 2–5%).

J.F. Belmonte; P. Eguía; A.E. Molina; J.A. Almendros-Ibáñez

2015-01-01T23:59:59.000Z

358

Modeling of Diesel Exhaust Systems: A methodology to better simulate...  

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

of Diesel Exhaust Systems: A methodology to better simulate soot reactivity Modeling of Diesel Exhaust Systems: A methodology to better simulate soot reactivity Discussed...

359

Overview of Vehicle and Systems Simulation and Testing | Department...  

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

More Documents & Publications Overview of Vehicle and Systems Simulation and Testing Overview of Vehicle and Systems Simulation and Testing Vehicle Technologies Office...

360

Vehicle and Systems Simulation and Testing | Department of Energy  

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

Vehicle and Systems Simulation and Testing Vehicle and Systems Simulation and Testing 2010 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation...

Note: This page contains sample records for the topic "hvac systems simulation" 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

Vehicle and Systems Simulation and Testing | Department of Energy  

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

and Systems Simulation and Testing Vehicle and Systems Simulation and Testing 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

362

Vehicle and Systems Simulation and Testing | Department of Energy  

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

Vehicle and Systems Simulation and Testing Vehicle and Systems Simulation and Testing Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on...

363

Overview of Vehicle and Systems Simulation and Testing | Department...  

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

More Documents & Publications Overview of Vehicle and Systems Simulation and Testing Vehicle and Systems Simulation and Testing Volvo Super Truck Overview and Approach...

364

Chapitre 8: Simulation for Product Driven Systems  

E-Print Network (OSTI)

Chapitre 8: Simulation for Product Driven Systems CASTAGNA Pierre, THOMAS André BLANC Pascal of controlling production through traditional MRP² systems. hal-00341987,version1-26Nov2008 Author manuscript needs. Indeed, the mass production market moves to a mass customization one, which could be defined

Paris-Sud XI, Université de

365

Wireless Demand Response Controls for HVAC Systems  

E-Print Network (OSTI)

all network nodes on AA batteries for years and still haveon a pair of AA lithium batteries. Assuming the worst caseper battery for two batteries, the annual cost of battery

Federspiel, Clifford

2010-01-01T23:59:59.000Z

366

Measuring Advances in HVAC Distribution System Design  

E-Print Network (OSTI)

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

Franconi, E.

2011-01-01T23:59:59.000Z

367

Wireless Demand Response Controls for HVAC Systems  

E-Print Network (OSTI)

Strategies Linking Demand Response and Energy Efficiency,”Fully Automated Demand Response Tests in Large Facilities,technical support from the Demand Response Research Center (

Federspiel, Clifford

2010-01-01T23:59:59.000Z

368

Wireless Demand Response Controls for HVAC Systems  

E-Print Network (OSTI)

art VAV: variable-air-volume VFD: variable frequency drivespeed command to the variable frequency drive(s) (VFDs). The

Federspiel, Clifford

2010-01-01T23:59:59.000Z

369

Co-simulation for performance prediction of integrated building and HVAC systems - An analysis of solution characteristics using a two-body system  

E-Print Network (OSTI)

such as in the automotive, electronics or aerospace sector.sectors, such as the automotive, electronics or aerospace

Trcka, Marija

2010-01-01T23:59:59.000Z

370

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.

371

Building Performance Simulation  

E-Print Network (OSTI)

U-factor Windows: U-factor and SHGC HVAC systems System typeheat gain coef?- cient (SHGC) reduce space-heating loads.tem- perature difference. The SHGC represents the fractional

Hong, Tianzhen

2014-01-01T23:59:59.000Z

372

CHAMPS-Multizone-A Combined Heat, Air, Moisture and Pollutant Simulation  

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

CHAMPS-Multizone-A Combined Heat, Air, Moisture and Pollutant Simulation CHAMPS-Multizone-A Combined Heat, Air, Moisture and Pollutant Simulation Environment for Whole-building Performance Analysis Title CHAMPS-Multizone-A Combined Heat, Air, Moisture and Pollutant Simulation Environment for Whole-building Performance Analysis Publication Type Journal Article Year of Publication 2012 Authors Zhang, J. S., Wei Feng, John Grunewald, Andreas Nicolai, and Carey Zhang Journal HVAC&R Research Volume 18 Issue 1-2 Abstract A computer simulation tool, named "CHAMPS-Multizone" is introduced in this paper for analyzing bothenergy and IAQ performance of buildings. The simulation model accounts for the dynamic effects ofoutdoor climate conditions (solar radiation, wind speed and direction, and contaminant concentrations),building materials and envelope system design, multizone air and contaminant flows in buildings,internal heat and pollutant sources, and operation of the building HVAC systems on the buildingperformance. It enables combined analysis of building energy efficiency and indoor air quality. Themodel also has the ability to input building geometry data and HVAC system operation relatedinformation from software such as SketchUp and DesignBuilder via IDF file format. A "bridge" to accessstatic and dynamic building data stored in a "virtual building" database is also developed, allowingconvenient input of initial and boundary conditions for the simulation, and for comparisons between thepredicted and measured results. This paper summarizes the mathematical models, adoptedassumptions, methods of implementation, and verification and validation results. The needs andchallenges for further development are also discussed

373

Simulating Complex Window Systems using BSDF Data  

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

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

374

Connexus Energy - Residential Efficient HVAC Rebate Program | Department of  

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

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

375

HVAC Cabinet Air Leakage Test Method- Building America Top Innovation  

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

376

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

377

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

378

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

379

Fast time domain simulation for large order hybrid systems  

E-Print Network (OSTI)

Simulation is an important tool for the analysis and design of complex systems. As the models become more and more complex, more powerful simulation methods are desired. As an attempt to address this problem, a simulation ...

Sou, Kin Cheong, 1979-

2002-01-01T23:59:59.000Z

380

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

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...

382

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...

383

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...

384

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

385

Vehicle Technologies Office: 2010 Vehicle and Systems Simulation...  

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

Office: 2010 Vehicle and Systems Simulation and Testing R&D Annual Progress Report Vehicle Technologies Office: 2010 Vehicle and Systems Simulation and Testing R&D Annual Progress...

386

Overview of Vehicle and Systems Simulation and Testing | Department...  

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

n03vssslezak2012o.pdf More Documents & Publications Vehicle & Systems Simulation & Testing Overview of Vehicle and Systems Simulation and Testing Overview of the U.S. DOE...

387

Vehicle Technologies Office: 2012 Vehicle and Systems Simulation...  

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

2 Vehicle and Systems Simulation and Testing R&D Annual Progress Report Vehicle Technologies Office: 2012 Vehicle and Systems Simulation and Testing R&D Annual Progress Report FY...

388

Vehicle Technologies Office: 2013 Vehicle and Systems Simulation...  

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

3 Vehicle and Systems Simulation and Testing R&D Annual Progress Report Vehicle Technologies Office: 2013 Vehicle and Systems Simulation and Testing R&D Annual Progress Report FY...

389

Vehicle Technologies Office: 2011 Vehicle and Systems Simulation...  

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

1 Vehicle and Systems Simulation and Testing R&D Annual Progress Report Vehicle Technologies Office: 2011 Vehicle and Systems Simulation and Testing R&D Annual Progress Report FY...

390

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?

391

Evaluation of flow capture techniques for measuring HVAC grilleairflows  

SciTech Connect

This paper discusses the accuracy of commercially available flow hoods for residential applications. Results of laboratory and field tests indicate these hoods can be inadequate to measure airflows in residential systems, and there can be large measurement discrepancies between different flow hoods. The errors are due to poor calibrations, sensitivity of the hoods to grille airflow non-uniformities, and flow changes from added flow resistance. It is possible to obtain reasonable results using some flow hoods if the field tests are carefully done, the grilles are appropriate, and grille location does not restrict flow hood placement. We also evaluated several simple flow capture techniques for measuring grille airflows that could be adopted by the HVAC industry and homeowners as simple diagnostics. These simple techniques can be as accurate as commercially available devices. Our test results also show that current calibration procedures for flow hoods do not account for field application problems. As a result, agencies such as ASHRAE or ASTM need to develop a new standard for flow hood calibration, along with a new measurement standard to address field use of flow capture techniques.

Walker, Iain S.; Wray, Craig P.

2002-11-01T23:59:59.000Z

392

Deposition of biological aerosols on HVAC heat exchangers  

SciTech Connect

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

393

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.

394

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

395

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

396

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

SciTech Connect

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

397

Training, simulation, restoration expert system for power grid  

Science Journals Connector (OSTI)

The paper introduces some technology for training, simulation, restoration expert system of power grid, the structure of the system including function composition, hardware and software composition are discuss...

An Luo; Qian Chen

2001-03-01T23:59:59.000Z

398

Optimized HVAC Management Service to Enhance Demand Response  

NLE Websites -- All DOE Office Websites (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

399

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

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

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

400

E-Print Network 3.0 - automation simulation system Sample Search...  

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

Summary: Information and Reservation System" "Automated Phone Book Management System" "Simulation of Searching Family... HMI" "Security System Simulator" "Performance Comparison...

Note: This page contains sample records for the topic "hvac systems simulation" 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

Approved Module Information for EE3PSY, 2014/5 Module Title/Name: Power Systems 6 Module Code: EE3PSY  

E-Print Network (OSTI)

HVDC and HVAC. The work also covers several case studies on system collapse based in the UK, EU and USA

Neirotti, Juan Pablo

402

Approved Module Information for EE4PSY, 2014/5 Module Title/Name: Power Systems 6 Module Code: EE4PSY  

E-Print Network (OSTI)

HVDC and HVAC. The work also covers several case studies on system collapse based in the UK, EU and USA

Neirotti, Juan Pablo

403

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

SciTech Connect

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

404

Simulation of systems with dynamically varying model structure  

Science Journals Connector (OSTI)

Hybrid systems are dynamical systems composed of components with discrete and continuous behavior. Some systems change their structure during simulation, or their components behavior is essentially changing. This ''structural dynamics'' can be described ... Keywords: Discrete-continuous simulation, Hybrid systems, Modelica, Structural dynamics, VHDL-AMS

Peter Schwarz

2008-12-01T23:59:59.000Z

405

An Integrated Measurement to Road Vibration Simulation System  

E-Print Network (OSTI)

An Integrated Measurement to Road Vibration Simulation System Charles Birdsong, Ph.D. Dactron Inc for vibrations measured on a Jeep, compensated, and replicated on an electrodynamic shaker. Introduction. Simulation of measured vibrations requires data acquisition, data compensation, and reproduction

Birdsong, Charles

406

Electricity Consumption Simulation Based on Multi-agent System  

Science Journals Connector (OSTI)

In order to simulate impact on electricity of macroeconomic policy and foreign trade, Electricity Consumption Simulation System (ECMAS) was established based ... according to I/O table and data of electricity consumption

Minjie Xu; Zhaoguang Hu; Baoguo Shan…

2009-01-01T23:59:59.000Z

407

Simulating Complex Window Systems using BSDF Data  

E-Print Network (OSTI)

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

Konstantoglou, Maria

2011-01-01T23:59:59.000Z

408

Development of Design and Simulation Tool for Hybrid Geothermal Heat Pump  

Open Energy Info (EERE)

Design and Simulation Tool for Hybrid Geothermal Heat Pump Design and Simulation Tool for Hybrid Geothermal Heat Pump System Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Development of Design and Simulation Tool for Hybrid Geothermal Heat Pump System Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 2: Data Gathering and Analysis Project Description eQUEST is a widely accepted building and HVAC system energy analysis tool (freeware) that is powered with the latest implementation of the DOE-2.2 program. Due to its user-friendly interface and comprehensive capacity for performing building load calculations and HVAC system simulations, eQUEST has been widely used in whole building performance analysis for various purposes, including LEED certification and optimization of building envelop and/or HVAC system designs. In 2006, as a cooperative effort between CM and JJH (the developer of eQUEST), eQUEST capabilities were expanded to include simulation of conventional GHP systems comprised of water-to-air heat pump units, horizontal or vertical ground loop heat exchangers (GLHE), and lakes or wells. However, to date, eQUEST does not model hybrid systems, such as the combination of a fluid cooler in series with a GLHE. Nor is it capable of simulating water-to-water heat pumps coupled to a horizontal or vertical GLHE. As a result, significant opportunities are being missed, as hybrid and/or water-to-water GHP system applications may prove to be a cost effective solution in many situations.

409

MODELING AND SIMULATION OF HVAC FAULTS IN ENERGYPLUS  

E-Print Network (OSTI)

coefficient as well as increased pressure drop across coil Unintended heating depending on which position the valve

Basarkar, Mangesh

2013-01-01T23:59:59.000Z

410

Proton corebeam system in the expanding solar wind: Hybrid simulations  

E-Print Network (OSTI)

Proton corebeam system in the expanding solar wind: Hybrid simulations Petr Hellinger1,2 and Pavel. Trávnícek (2011), Proton corebeam system in the expanding solar wind: Hybrid simulations, J. Geophys. Res beamcore system in the solar wind are presented. The expansion with a strictly radial magnetic field leads

California at Berkeley, University of

411

HVAC Design Strategy for a Hot-Humid Production Builder, Houston, Texas (Fact Sheet)  

SciTech Connect

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.

Not Available

2014-03-01T23:59:59.000Z

412

System Simulations of Hybrid Electric Vehicles with Focus on...  

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

System Simulations of Hybrid Electric Vehicles with Focus on Emissions Zhiming Gao Veerathu K. Chakravarthy Josh Pihl C. Stuart Daw Maruthi Devarakonda Jong Lee...

413

Posters Mesoscale Simulations of Convective Systems with Data...  

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

7 Posters Mesoscale Simulations of Convective Systems with Data Assimilation During June 1993 in the Southern Great Plains J. Dudhia Mesoscale and Microscale Meteorology Division...

414

Large-Eddy Simulation for Green Energy and Propulsion Systems...  

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

Large-Eddy Simulation for Green Energy and Propulsion Systems PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: General Electric Allocation Program: INCITE Allocation...

415

A review of methods to match building energy simulation models to measured data  

E-Print Network (OSTI)

whole building heat energy and electrical loads. Therefore,in HVAC system electrical energy consumption in response towhole-building electrical energy consumption). Procedural

Coakley, Daniel; Raftery, Paul; Keane, Marcus

2014-01-01T23:59:59.000Z

416

GridLab Power Distribution System Simulation | Open Energy Information  

Open Energy Info (EERE)

GridLab Power Distribution System Simulation GridLab Power Distribution System Simulation Jump to: navigation, search Tool Summary Name: GridLab Power Distribution System Simulation Agency/Company /Organization: Pacific Northwest National Laboratory Sector: Energy Focus Area: Grid Assessment and Integration Phase: Evaluate Options Topics: Pathways analysis User Interface: Desktop Application Website: www.gridlabd.org/ Cost: Free OpenEI Keyword(s): EERE tool Language: English References: GridLAB-D Simulation Software[1] Examine in detail the interplay of every part of a distribution system with every other part of the system. GridLAB-D(tm) is a new power distribution system simulation and analysis tool that provides valuable information to users who design and operate distribution systems, and to utilities that wish to take advantage of the

417

Explosive simulants for testing explosive detection systems  

DOE Patents (OSTI)

Explosives simulants that include non-explosive components are disclosed that facilitate testing of equipment designed to remotely detect explosives. The simulants are non-explosive, non-hazardous materials that can be safely handled without any significant precautions. The simulants imitate real explosives in terms of mass density, effective atomic number, x-ray transmission properties, and physical form, including moldable plastics and emulsions/gels.

Kury, John W. (Danville, CA); Anderson, Brian L. (Lodi, CA)

1999-09-28T23:59:59.000Z

418

A Simulation Model for Evaluating Distributed Systems Dependability  

E-Print Network (OSTI)

In this paper we present a new simulation model designed to evaluate the dependability in distributed systems. This model extends the MONARC simulation model with new capabilities for capturing reliability, safety, availability, security, and maintainability requirements. The model has been implemented as an extension of the multithreaded, process oriented simulator MONARC, which allows the realistic simulation of a wide-range of distributed system technologies, with respect to their specific components and characteristics. The extended simulation model includes the necessary components to inject various failure events, and provides the mechanisms to evaluate different strategies for replication, redundancy procedures, and security enforcement mechanisms, as well. The results obtained in simulation experiments presented in this paper probe that the use of discrete-event simulators, such as MONARC, in the design and development of distributed systems is appealing due to their efficiency and scalability.

Dobre, Ciprian; Cristea, Valentin

2012-01-01T23:59:59.000Z

419

Simulation of Fuel Oil System in Marine Engine Simulator Based on Finite Element Method  

Science Journals Connector (OSTI)

This paper focuses on the simulation research to fuel oil system. Hydrodynamic analysis to fuel oil system pipelines network is done and the modeling method is using finite element theory. A relative accepted ...

Diyang Li; Yuan Jiang; Boyang Li

2012-01-01T23:59:59.000Z

420

A simulation study for a coal delivery system  

Science Journals Connector (OSTI)

This paper discusses a computer simulation model that was constructed to assist in evaluating alternatives for a coal delivery system. A complex system, involving unit trains, intermediate storage, transshipment and lake vessels is required to transport ...

T. C. Vorce

1982-03-01T23:59:59.000Z

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421

Hybrid Power System Simulation Model | Open Energy Information  

Open Energy Info (EERE)

Hybrid Power System Simulation Model Hybrid Power System Simulation Model Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Hybrid Power System Simulation Model Focus Area: Renewable Energy Topics: System & Application Design Website: www.umass.edu/windenergy/OLD_SITE/projects/hybrid2/ Equivalent URI: cleanenergysolutions.org/content/hybrid-power-system-simulation-model, Language: English Policies: Deployment Programs DeploymentPrograms: Technical Assistance This tool performs detailed long-term performance and economic analysis on a wide variety of hybrid power systems. It is a probabilistic/time-series computer model, using time-series data for loads, wind speed, solar insolation, temperature, and the power system designed or selected by the user, to predict the performance of the hybrid power system. An economic

422

Improving efficiency of hybrid system simulation in Modelica  

Science Journals Connector (OSTI)

Modelica supports the modeling of hybrid systems by means of differential and algebraic equations, and discrete-events. The simulation of Modelica models is carried out by solving the continuous-time equations, detecting the occurrence of events and ... Keywords: Modelica, event iteration, hybrid system modeling, simulation performance

Victorino Sanz, Alfonso Urquia, Francesco Casella

2014-10-01T23:59:59.000Z

423

Simulating the Consumers' Energy Profiles Using Multiagent Systems  

Science Journals Connector (OSTI)

Simulation of home use of electric energy is a very powerful tool for the purpose of studying, planning and managing at electric energy distribution companies. This paper presents a NetLogo-based multi-agent system for energy consumption simulation in ... Keywords: Multiagent Systems, NetLogo, Electricity Consumption.

Fernanda P. Mota, Vagner Rosa, Silvia S. da C. Botelho, Iverton Santos, Graçaliz Dimuro

2013-09-01T23:59:59.000Z

424

Simulation of IPA Gradients in Hybrid Network Systems Benjamin Melamed  

E-Print Network (OSTI)

Simulation of IPA Gradients in Hybrid Network Systems Benjamin Melamed Rutgers University Rutgers Atlanta, GA 30332 October 26, 2005 Abstract Infinitesimal Perturbation Analysis (IPA) provides formulas paths of stochastic systems. In practice, IPA derivatives may be computed either from simulation runs

425

An intermediate language for the stochastic simulation of biological systems  

Science Journals Connector (OSTI)

We introduce Stochastic String MultiSet Rewriting (sSMSR), and propose this formalism as an intermediate language for the simulation of biomolecular systems. Higher level formalisms for biological systems description can be translated into sSMSR, and ... Keywords: MultiSet rewriting, Stochastic ?-calculus, Stochastic Calculus of Looping Sequences, Stochastic simulation

Roberto Barbuti; Giulio Caravagna; Andrea Maggiolo-Schettini; Paolo Milazzo

2009-08-01T23:59:59.000Z

426

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

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

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

427

CHARACTERIZATION OF AIRFLOWS NEAR THE EXIT OF HVAC REGISTERS USING LASER DOPPLER VELOCIMETRY (LDV).  

SciTech Connect

A facility to characterize the airflow at the exit of HVAC registers was designed and fabricated. The objective of this work is to obtain velocity and turbulence data at the exit of registers, which can then be used as an input boundary condition in a modern Computational Fluid Dynamics (CFD) code to predict the velocity and temperature distribution in an enclosure, and also the register performance parameters such as throw. During the course of this work, two commonly used registers were tested. Both registers were 8 inch x 4 inch sidewall registers. Laser Doppler Velocimetry was used to measure the axial and vertical components of the velocity vector at various locations across the face of the registers. For the two cases of registers studied here, the results suggest that the velocity field at the very exit of each of these registers scales with the flow rate through the registers. This means that, in the mode of operation in which the supply fan (of an HVAC system) has a ''High'' and ''Low'' setting, similar velocity scaling would result for the type of registers tested here.

TUTU,N.K.; KRISHNA,C.R.; ANDREWS,J.W.; BUTCHER,T.A.

2003-03-13T23:59:59.000Z

428

HVAC Radial Air Bearing Heat Exchangers Research Project | Department of  

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

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

429

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

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

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

430

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

431

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

432

Active Integrated Perimeter Building Systems | Department of...  

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

sensor data, but sharing the data with faade and HVAC control systems to implement load reduction or demand-side ventilation strategies is difficult because the data are...

433

Optimization of Ice Thermal Storage Systems Design for HVAC Systems  

E-Print Network (OSTI)

Ice thermal storage is promising technology to reduce energy costs by shifting the cooling cost from on-peak to off-peak periods. The paper discusses the optimal design of ice thermal storage and its impact on energy consumption, demand, and total...

Nassif, N.; Hall, C.; Freelnad, D.

2013-01-01T23:59:59.000Z

434

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

435

Enhancing complex system performance using discrete-event simulation  

Science Journals Connector (OSTI)

In this paper, we utilize discrete-event simulation (DES) merged with human factors analysis to provide the venue within which the separation and deconfliction of the system/human operating principles can occur. A concrete example is presented to illustrate ... Keywords: discrete event simulation, potential capacity, queuing model

Glenn O. Allgood; Mohammed M. Olama; Joe E. Lake

2010-04-01T23:59:59.000Z

436

Simulation Models for Improved Water Heating Systems  

E-Print Network (OSTI)

The DLM accounts for the distribution heat loss within eachHot-Water Distribution System Piping Heat Loss Factors—PhaseHot Water Distribution System Piping Heat Loss Factors-

Lutz, Jim

2014-01-01T23:59:59.000Z

437

A Federated Simulation Environment for Hybrid Systems  

Science Journals Connector (OSTI)

Hybrid computing systems consisting of multiple platform types (e.g., general purpose processors, FPGAs etc.) are increasingly being used to achieve higher performance and lower costs than can be obtained with homogeneous systems (e.g., processor clusters). ...

Saurabh Gayen; Eric J. Tyson; Mark A. Franklin; Roger D. Chamberlain

2007-06-01T23:59:59.000Z

438

Hybrid computer simulation of atomic orbitals of one electron system  

E-Print Network (OSTI)

OF SCIENCE May 1998 Major Subject: Biomedical Engineering HYBRID COMPUER SIMULATION OF ATOMIC ORBITALS OF ONE ELECTRON SYSTEM A Thesis by PRABAKER BALASUBRAMANIUM Submitted to Texas ARM University in partial fulfillment of the requirements...

Balasubramanium, Prabaker

2012-06-07T23:59:59.000Z

439

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...

440

A Simulation Study of Demand Responsive Transit System Design  

E-Print Network (OSTI)

A Simulation Study of Demand Responsive Transit System Design Luca Quadrifoglio, Maged M. Dessouky changed the landscape for demand responsive transit systems. First, the demand for this type of transit experiencing increased usage for demand responsive transit systems. The National Transit Summaries and Trends

Dessouky, Maged

Note: This page contains sample records for the topic "hvac systems simulation" 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

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

442

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

443

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.

444

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

445

Solid oxide fuel cell/gas turbine trigeneration system for marine applications  

Science Journals Connector (OSTI)

Shipping contributes 4.5% to global CO2 emissions and is not covered by the Kyoto Agreement. One method of reducing CO2 emissions on land is combined cooling heating and power (CCHP) or trigeneration, with typical combined thermal efficiencies of over 80%. Large luxury yachts are seen as an ideal entry point to the off-shore market for this developing technology considering its current high cost. This paper investigates the feasibility of combining a SOFC-GT system and an absorption heat pump (AHP) in a trigeneration system to drive the heating ventilation and air conditioning (HVAC) and electrical base-load systems. A thermodynamic model is used to simulate the system, with various configurations and cooling loads. Measurement of actual yacht performance data forms the basis of this system simulation. It is found that for the optimum configuration using a double effect absorption chiller in Ship 1, the net electric power increases by 47% relative to the electrical power available for a conventional SOFC-GT-HVAC system. This is due to more air cooled to a lower temperature by absorption cooling; hence less electrical cooling by the conventional HVAC unit is required. The overall efficiency is 12.1% for the conventional system, 34.9% for the system with BROAD single effect absorption chiller, 43.2% for the system with double effect absorption chiller. This shows that the overall efficiency of a trigeneration system is far higher when waste heat recovery happens. The desiccant wheel hardly reduces moisture from the outdoor air due to a relative low mass flow rate of fuel cell exhaust available to dehumidify a very large mass flow rate of HVAC air, Hence, desiccant wheel is not recommended for this application.

Lawrence Kar Chung Tse; Steven Wilkins; Niall McGlashan; Bernhard Urban; Ricardo Martinez-Botas

2011-01-01T23:59:59.000Z

446

Simulation and analysis of district-heating and -cooling systems  

SciTech Connect

A computer simulation model, GEOCITY, was developed to study the design and economics of district heating and cooling systems. GEOCITY calculates the cost of district heating based on climate, population, energy source, and financing conditions. The principal input variables are minimum temperature, heating degree-days, population size and density, energy supply temperature and distance from load center, and the interest rate. For district cooling, maximum temperature and cooling degree-hours are required. From this input data the model designs the fluid transport and district heating systems. From this design, GEOCITY calculates the capital and operating costs for the entire system. GEOCITY was originally developed to simulate geothermal district heating systems and thus, in addition to the fluid transport and distribution models, it includes a reservoir model to simulate the production of geothermal energy from geothermal reservoirs. The reservoir model can be adapted to simulate the supply of hot water from any other energy source. GEOCITY has been used extensively and has been validated against other design and cost studies. GEOCITY designs the fluid transport and distribution facilities and then calculates the capital and operating costs for the entire system. GEOCITY can simulate nearly any financial and tax structure through varying the rates of return on equity and debt, the debt-equity ratios, and tax rates. Both private and municipal utility systems can be simulated.

Bloomster, C.H.; Fassbender, L.L.

1983-03-01T23:59:59.000Z

447

Simulation Models for Improved Water Heating Systems  

E-Print Network (OSTI)

distribution (in multi-family buildings); efficiency (eithercentral systems in multi- family buildings are assigned a54 °C (130 °F) for multi-family buildings that have central

Lutz, Jim

2014-01-01T23:59:59.000Z

448

Supercomputers model and simulate complex, dynamic systems  

Office of Environmental Management (EM)

Laboratory System has built and deployed some of the most significant high-performance computing (HPC) resources available anywhere, including 32 of the 500 fastest...

449

Modeling particle deposition on HVAC heat exchangers  

SciTech Connect

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

450

Power system and dispatch training simulator  

Science Journals Connector (OSTI)

Complex technical processes require careful training of operating personnel. This is particularly true for systems where training might affect equipment or safety of people if done during regular operation. Impor...

Prof. Dr.-Ing. Edmund Handschin…

1991-01-01T23:59:59.000Z

451

Nuclear Power - System Simulations and Operation  

E-Print Network (OSTI)

experi e n c e with water cooled and water modera t e d therma l reacto r s , based on fission of uranium- 2 3 5 . Neverthe l es s , the metho d o l o gi c al achie v e me n t s in simul a t i o n menti o n e d be low can defin it e l y be used... ul i c proce ss e s insid e the primary circuit of a pressurized water reactor (PWR) we can use the RELAP progra m (dev e l o p ed in the USA), the ATHLET code (devel o p ed in German y ) or the CATHARE cod e (deve l o p ed in Franc e ) . Several...

452

INEX simulations of the Boeing FEL system  

Science Journals Connector (OSTI)

The INEX (integrated numerical experiment) numerical model is applied to the 0.6 ?m FEL oscillator at the Boeing laboratory in Seattle, WA. This sytem consists of a 110 MeV L-band rf linac, a beam transport line from the accelerator to the entrance of the wiggler, the 5.0 m THUNDER variable-taper wiggler, and a near-concentric two-mirror optical oscillator. Many aspects of the model for the electron beam accelerator and transport line agree with experimental measurements. Predictions for lasing performance are compared with data obtained in May and June 1989, using a mild-tapered wiggler. We obtain good agreement with the achieved extraction efficiency, while ID pulse simulations reproduce the observed sideband instability.

R.L. Tokar; L.M. Young; A.H. Lumpkin; B.D. McVey; L.E. Thode; S.C. Bender; K.C.D. Chan; A.D. Yeremian; D.H. Dowell; A.R. Lowrey; D.C. Quimby

1990-01-01T23:59:59.000Z

453

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

454

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

455

Building America Webinar: High Performance Space Conditioning Systems, Part II  

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

The webinar on Nov. 18, 2014, continued the series on strategies to improve the performance of HVAC systems for low load homes and home performance retrofits.

456

Building America Webinar: High Performance Space Conditioning Systems, Part I  

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

The webinar on Oct. 23, 2014 focused on strategies to improve the performance of HVAC systems for low load homes and home performance retrofits.

457

Applications of Optimal Building Energy System Selection and Operation  

E-Print Network (OSTI)

as a Service ST: solar thermal SVOW: Storage Viability WebPerformance of a Solar-Thermal-Assisted HVAC System,” Energyscheduling, PV, solar thermal, batteries INTRODUCTION

Marnay, Chris

2014-01-01T23:59:59.000Z

458

Buildings Energy Data Book: 5.5 Thermal Distribution Systems  

Buildings Energy Data Book (EERE)

HVAC Equipment Manufacturers (2009 Million) Air-Handling Units 1032 Cooling Towers 533 Pumps 333 Central System Terminal Boxes 192 Classroom Unit Ventilator 160 Fan Coil Units 123...

459

A computer simulation of a generalized police patrol system  

E-Print Network (OSTI)

rates, etc. for the system, 3) re-writing the dispatch subroutine (DISPAT) such that it processes calls for service, etc. in accordance with the dispatching discipline used in the system being simulated. The model may then be used to test proposed... patrol system modifications such as patrol sector boundary changes, changes in dispatching discipline, and the use of an Automatic Vehicle Monitoring (AVM) system. Provisions are made for generating three classes of calls for service according to a...

Dozier, Harold Wallace

1975-01-01T23:59:59.000Z

460

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

Note: This page contains sample records for the topic "hvac systems simulation" 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

NETL: Gasification Systems - Advanced Virtual Energy Simulation Training  

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

Advanced Virtual Energy Simulation Training And Research (AVESTAR(tm)) Facility Advanced Virtual Energy Simulation Training And Research (AVESTAR(tm)) Facility Project No: Adv Gas-FY131415 Task 6 Developed as a part of NETL's initiative to advance new clean coal technology, the Advanced Virtual Energy Simulation Training And Research (AVESTARTM) Center is focused on training engineers and energy plant operators in the efficient, productive, and safe operation of highly efficient power generation systems that also protect the environment. Comprehensive dynamic simulator-based instruction better prepares operators and engineers to manage advanced energy plants according to economic constraints while minimizing or avoiding the impact of any potentially harmful, wasteful, or inefficient events. Advanced Virtual Energy Simulation Training and Research Center - AVESTAR

462

Co-Simulation Tools for Networked Control Systems  

E-Print Network (OSTI)

, unmanned vehicles, home robotics, distributed virtual environments, power distribution, and building-simulation. The first two tools are extensions to ns-2 called Agent/Plant and NSCSPlant; the third tool integrates and control of the physical world. (right) A networked control system with one controlled system (a.k.a. plant

Branicky, Michael S.

463

Heart-Rate Pacing Simulation and Control via Multiagent Systems  

E-Print Network (OSTI)

Heart-Rate Pacing Simulation and Control via Multiagent Systems Alessandro Beda 1 and Nicola Gatti system of heart rate, but the results are so poor that the use of such models in commercial pacemakers evaluation. In litera- ture several techniques are adopted to combine models; for instance, in heart

Gatti, Nicola

464

Simulating parallel programs on application and system level  

Science Journals Connector (OSTI)

Understanding the measured performance of parallel applications in real systems is difficult--with the aim to utilize the resources available, optimizations deployed in hardware and software layers build up to complex systems. However, in order to identify ... Keywords: MPI-IO, Simulation, Tracing

Julian M. Kunkel

2013-05-01T23:59:59.000Z

465

Aircraft AC Generators: Hybrid System Modeling and Simulation  

E-Print Network (OSTI)

1 Aircraft AC Generators: Hybrid System Modeling and Simulation Ashraf Tantawy, Student Member--Integrated Drive Generators (IDGs) are the main source of electrical power for a number of critical systems is a difficult task. dq0 models have been developed for design and control of generators, but these models

Koutsoukos, Xenofon D.

466

An observing system simulation for Southern Ocean carbon dioxide uptake  

Science Journals Connector (OSTI)

...components of the global carbon cycle in the CMIP5 Earth system models. J. Clim. 26, 6801-6843. ( doi:10.1175...2012 GFDL's ESM2 global coupled climate-carbon Earth system models. Part I: physical formulation and baseline simulation...

2014-01-01T23:59:59.000Z

467

Air-Conditioning Systems Simulate World-Wide Climates  

Science Journals Connector (OSTI)

Air-Conditioning Systems Simulate World-Wide Climates ... WEATHER conditions equivalent to those in any part of the world can be simulated in a four-compartment test box set up at State College, Penna., by the U. S. Department of Agriculture's Regional Pasture Research Laboratory in its work to develop better pastures. ... Three heavily insulated doors permit access to each compartment; an inner door keeps conditioned air in the box from rushing out when the main door is opened. ...

1941-10-25T23:59:59.000Z

468

Simulation and simplified design studies of photovoltaic systems  

SciTech Connect

Results of TRNSYS simulations of photovoltaic systems with electrical storage are described. Studies of the sensitivity of system performance, in terms of the fraction of the electrical load supplied by the solar energy system, to variables such as array size, battery size, location, time of year, and load shape are reported. An accurate simplified method for predicting array output of max-power photovoltaic systems is presented. A second simplified method, which estimates the overall performance of max-power systems, is developed. Finally, a preliminary technique for predicting clamped-voltage system performance is discussed.

Evans, D.L.; Facinelli, W.A.; Koehler, L.P.

1980-09-01T23:59:59.000Z

469

Fouling of HVAC fin and tube heat exchangers  

SciTech Connect

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

470

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

471

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

472

Joint HVAC transmission EMF environmental study  

SciTech Connect

This document describes the rationale, procedures, and results of a carefully controlled study conducted to establish whether chronic exposure of female (ewe) Suffolk lambs to the environment of a 500-kV 60-Hz transmission line would affect various characteristics of growth, endocrine function, and reproductive development. This experiment used identical housing and management schemes for control and line-exposed ewes, thus minimizing these factors as contributors to between-group experimental error. Further, throughout the 10-month duration of this study, changes in electric and magnetic fields, audible noise, and weather conditions were monitored continuously by a computerized system. Such measurements provided the opportunity to identify any relationship between environmental factors and biological responses. Because of reports in the literature that electric and magnetic fields alter concentrations of melatonin in laboratory animals, the primary objective of this study was to ascertain whether a similar effect occurs in lambs exposed to a 500-kV a-c line in a natural setting. In addition, onset of puberty, changes in body weight, wool growth, and behavior were monitored. To determine whether the environment of a 500-kV line caused stress in the study animals, serum levels of cortisol were measured. The study was conducted at Bonneville Power Administration's Ostrander Substation near Estacada, Oregon.

Stormshak, F.; Thompson, J. (Oregon State Univ., Corvallis, OR (United States))

1992-05-01T23:59:59.000Z

473

Comparison of two techniques for the simulation of PV systems  

SciTech Connect

For several years, MIT Lincoln Laboratory has conducted computer simulations of the performance of photovoltaic solar energy systems in order to size system components, to define designs of potential economic feasibility, to test various control schemes, and to monitor the performance of working systems in the field. When used as an aid-to-design, these hourly simulations step through a full year's worth of insolation and weather data at a specific geographical site. These data are available on computer tapes in the SOLMET format from the National Climatic Center. More recently, a simulation technique has been developed that does not require marching through time but instead works with probability-density functions of daily values of insolation and load as inputs while still providing estimates of the usual measures of system performance (e.g., auxiliary energy required, surplus energy thrown away, fraction of load displaced). Results obtained compare well with results previously obtained from an hourly simulation of a daytime radio station. This technique may be used to study the effect on system performance of varying degrees of correlation of load with insolation and to test the sensitivity of economic analyses to variations in utility escalation rate (discounted for inflation), PV module and balance-of-system costs.

Bucciarelli, L.L.; Grossman, B.L.

1980-01-01T23:59:59.000Z

474

Acceleration of the matrix multiplication of Radiance three phase daylighting simulations with parallel computing on heterogeneous hardware of personal computer  

SciTech Connect

Building designers are increasingly relying on complex fenestration systems to reduce energy consumed for lighting and HVAC in low energy buildings. Radiance, a lighting simulation program, has been used to conduct daylighting simulations for complex fenestration systems. Depending on the configurations, the simulation can take hours or even days using a personal computer. This paper describes how to accelerate the matrix multiplication portion of a Radiance three-phase daylight simulation by conducting parallel computing on heterogeneous hardware of a personal computer. The algorithm was optimized and the computational part was implemented in parallel using OpenCL. The speed of new approach was evaluated using various daylighting simulation cases on a multicore central processing unit and a graphics processing unit. Based on the measurements and analysis of the time usage for the Radiance daylighting simulation, further speedups can be achieved by using fast I/O devices and storing the data in a binary format.

University of Miami; Zuo, Wangda; McNeil, Andrew; Wetter, Michael; Lee, Eleanor S.

2013-04-30T23:59:59.000Z

475

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

476

Modeling and Simulation of a Solar Assisted Desiccant Cooling System  

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

Modeling and Simulation of a Solar Assisted Desiccant Cooling System Modeling and Simulation of a Solar Assisted Desiccant Cooling System Speaker(s): Chadi Maalouf Date: December 2, 2004 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Peng Xu Increased living standards and high occupants comfort demands lead to a growth in air conditioning market. This results in high energy consumption and high CO2 emissions. For these reasons, the solar desiccant cooling system is proposed as an alternative to traditional air conditioning systems. This system comprises a desiccant wheel containing Lithium Chloride in tandem with a rotating heat exchanger and two humidifiers on both supply and return air. The required regeneration temperature for the desiccant wheel varies between 40oC and 70oC which makes possible the use

477

Field testing of component-level model-based fault detection methods for mixing boxes and VAV fan systems  

SciTech Connect

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 of the sort using in commissioning. This paper presents the results of field tests of mixing box and VAV fan system models in an experimental facility and a commercial office building. The models were found to be capable of representing the performance of correctly operating mixing box and VAV fan systems and detecting several types of incorrect operation.

Xu, Peng; Haves, Philip

2002-05-16T23:59:59.000Z

478

Fire Simulation, Evacuation Analysis and Proposal of Fire Protection Systems Inside an Underground Cavern  

E-Print Network (OSTI)

Fire Simulation, Evacuation Analysis and Proposal of Fire Protection Systems Inside an Underground Cavern

Stella, Carlo

479

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)  

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

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

480

PowerSystemsSimulation NSERC Industrial Research Chair in  

E-Print Network (OSTI)

, Aalborg Univ. and Univ. of Manitoba, email:skc@et.aau.dk A 400MW offshore wind power plant has been an offshore wind power plant to an onshore grid. To develop a PSCAD/EMTDC simulation model of an offshore WPP Faults in the Offshore Wind Power Grid System Layout and Single Line Diagram Main Objectives: VSC

Chaudhary, Sanjay

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481

Patch dynamics: macroscopic simulation of multiscale systems , Y. Kevrekidis2  

E-Print Network (OSTI)

Patch dynamics: macroscopic simulation of multiscale systems G. Samaey1 , Y. Kevrekidis2 , D. Rose1-called "equation-free" framework, based on the idea of a so-called coarse-grained time-stepper. The patch dynamics microscopic model in small portions of the space-time domain (the patches). We present some theoretical

Gorban, Alexander N.

482

Indoor humidity and human health: part II--buildings and their systems  

E-Print Network (OSTI)

Northwest homes. Healthy Buildings: Proceeding of IAQ ’91,inside an HVAC system compatible with a healthy building?Healthy Buildings: Proceeding of IAQ ’91, September,

Arens, Edward A; Baughman, A.

1996-01-01T23:59:59.000Z

483

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

Energy.gov (U.S. Department of Energy (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?"

484

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

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

485

DOE Convening Report on Certification of Commercial HVAC and CRE Products  

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

486

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

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

487

DOE Convening Report on Certification of Commercial HVAC and CRE Products  

NLE Websites -- All DOE Office Websites (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

488

Force control system design for aerodynamic load simulator  

Science Journals Connector (OSTI)

A dynamic load simulator which can reproduce on-ground the aerodynamic hinge moment of control surface is an essential rig for the performance and stability test of an aircraft actuation system. The hinge moment varies widely over the flight envelope depending on the specific flight condition and maneuvering status. To replicate the wide spectrum of this hinge moment variation within some accuracy bounds, a force controller is designed based on the quantitative feedback theory (QFT). A dynamic model of load actuation system is derived, and verified through the experiment. The efficacy of QFT force controller is verified by a numerical simulation, in which combined aircraft dynamics, flight control law and hydraulic actuation system dynamics of aircraft control surface are considered.

Yoonsu Nam; Sung Kyung Hong

2002-01-01T23:59:59.000Z

489

Modelling, Simulation, Control and Optimisation of Nonsmooth Systems http://www.inrialpes.fr/bipop/  

E-Print Network (OSTI)

Neural networks Modelling and simulation bipeds Optimization of energy production Masonry structuresBIPOP Modelling, Simulation, Control and Optimisation of Nonsmooth Systems Web Site http

490

Design and simulation of assembly systems with mobile robots  

Science Journals Connector (OSTI)

Abstract This paper proposes an approach to the design and operation of assembly systems that include mobile robots. It is based on a semantic model representing the robot/resource skills along with the operations that a resource has to execute. The method is implemented in a system capable of generating the assignment of operations to the proper robotic resources. Collision free paths can be generated for the assembly system robots with the help of simulation. The method is presented in a case study from the automotive industry.

George Michalos; Konstantinos Kaltsoukalas; Panagiotis Aivaliotis; Platon Sipsas; Andreas Sardelis; George Chryssolouris

2014-01-01T23:59:59.000Z

491

Evaluation of Emerging Diagnostic Tools for Commercial HVAC Systems  

E-Print Network (OSTI)

six tools in our analysis: Architectural Energy Corporation's ENFORMA? software, Facility Dynamics Engineering's Performance And Continuous Re-commissioning Analysis Tool (PACRAT), Pacific Northwest National Laboratory's Whole Building Diagnostician...

Friedman, H.; Piette, M. A.

2001-01-01T23:59:59.000Z

492

Comparison of Building Energy Modeling Programs: HVAC Systems  

E-Print Network (OSTI)

Comparison of Building Energy Modeling Programs: BuildingComparison of Building Energy Modeling Programs: HVACassumptions of three building energy modeling programs (

Zhou, Xin

2014-01-01T23:59:59.000Z

493

Comparison of Control Strategies for Energy Efficient Building HVAC Systems  

E-Print Network (OSTI)

transfer in rooms in the modelica buildings library. [18] A.Building models are first captured in Modelica [1]to leverage Modelica’s rich building component library and

Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2014-01-01T23:59:59.000Z

494

Model-Based Hierarchical Optimal Control Design for HVAC Systems  

E-Print Network (OSTI)

sun on the external sides of the walls in deriving the differential equations of the temperature distribution

Maasoumy, Mehdi; Pinto, Alessandro; Sangiovanni-Vincentelli, Alberto

2014-01-01T23:59:59.000Z

495

Fault Detection and Diagnosis in Building HVAC Systems  

E-Print Network (OSTI)

box, fan, and heating/cooling coils in air-handling units.fan efficiency and coil duty. In this chapter, we present a statistical approach for rooftop unit

Najafi, Massieh

2010-01-01T23:59:59.000Z

496

Retrofit Analysis of HVAC Systems Using Artificial Neural Networks.  

E-Print Network (OSTI)

??This thesis aims to explore the benefits of retrofits applied to the compressor and burner in the AC and furnace respectively and how best to… (more)

Anand, Anish

2014-01-01T23:59:59.000Z

497

BIM vid installationsprojektering; Planning HVAC systems using BIM.  

E-Print Network (OSTI)

?? Planet rendering plays an important role in universe visualization and geographic visualization. The recent tools and methods allow better data acquisition, usually with very… (more)

Louise, Kollberg

2009-01-01T23:59:59.000Z

498

Development of an adaptive fuzzy logic controller for HVAC system.  

E-Print Network (OSTI)

??An adaptive approach to control a cooling coil chilled water valve operation, called adaptive fuzzy logic control (AFLC), is developed and validated in this study.… (more)

Navale, Rahul Laxman

2006-01-01T23:59:59.000Z

499

Software for fault detection in HVAC systems in commercial buildings  

E-Print Network (OSTI)

The building sector of the United States currently consumes over 41% of the United States primary energy supply. Estimates suggest that between 5 and 30% of any building's annual energy consumption is unknowingly wasted ...

Deshmukh, Suhrid Avinash

2014-01-01T23:59:59.000Z

500

A novel parallelization technique for DEVS simulation of continuous and hybrid systems  

Science Journals Connector (OSTI)

In this paper, we introduce a novel parallelization technique for Discrete Event System Specification (DEVS) simulation of continuous and hybrid systems. Here, like in most parallel discrete event simulation methodologies, the models are first split ... Keywords: QSS, discrete event systems, hybrid systems, parallel simulation, real-time systems

Federico Bergero; Ernesto Kofman; François Cellier

2013-06-01T23:59:59.000Z