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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

MAPPING HVAC SYSTEMS FOR SIMULATION IN ENERGYPLUS  

E-Print Network [OSTI]

LBNL-XXXXX MAPPING HVAC SYSTEMS FOR SIMULATION IN ENERGYPLUSof California. MAPPING HVAC SYSTEMS FOR SIMULATION INpresent a conventional view of HVAC systems to the user, and

Basarkar, Mangesh

2013-01-01T23:59:59.000Z

2

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

3

Co-simulation of innovative integrated HVAC systems in buildings  

E-Print Network [OSTI]

Integrated Simulation for HVAC Per- formance Prediction:air-conditioning equipment models (HVAC BESTEST), volume 1:air-conditioning equipment models (HVAC BESTEST), volume 2:

Trcka, Marija

2010-01-01T23:59:59.000Z

4

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]

of innovative integrated HVAC systems in buildings, infor building envelope and HVAC systems simu- lation - WillIntegrated simulation for HVAC performance prediction: State

Trcka, Marija

2010-01-01T23:59:59.000Z

5

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

6

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

7

MAPPING HVAC SYSTEMS FOR SIMULATION IN Author(s), Mangesh Basarkar, James O'Donnell, Philip  

E-Print Network [OSTI]

LBNL-5565E MAPPING HVAC SYSTEMS FOR SIMULATION IN ENERGYPLUS Author(s), Mangesh Basarkar, James O Government or any agency thereof or The Regents of the University of California. #12;MAPPING HVAC SYSTEMS tools to be accessible to designers, tool interfaces should present a conventional view of HVAC systems

8

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

9

Comparison of Building Energy Modeling Programs: HVAC Systems  

E-Print Network [OSTI]

and Mehry Yazdanian. Comparisons of HVAC Simulations betweeninformation Comparison of HVAC System Simulations inCLT (kW) Comparison of HVAC System Simulations in Different

Zhou, Xin

2014-01-01T23:59:59.000Z

10

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

11

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

E-Print Network [OSTI]

and Judkoff, R. 2002. IEA HVAC BESTEST volume 1, Technicaland Judkoff, R. 2004. IEA HVAC BESTEST volume 2, TechnicalOF INNOVATIVE INTEGRATED HVAC SYSTEMS IN BUILDINGS Marija

Trcka, Marija

2010-01-01T23:59:59.000Z

12

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

E-Print Network [OSTI]

of Commercial Building HVAC Systems, Atlanta: American2012. Modeling and simulation of HVAC faults in EnergyPlus,Modeling and Simulation of HVAC Faulty Operations and

Wang, Liping

2014-01-01T23:59:59.000Z

13

Model-Based Hierarchical Optimal Control Design for HVAC Systems  

E-Print Network [OSTI]

trol algorithm design for hvac systems in energy efficientH.R. Sualem. Building and HVAC System simulation with theOPTIMAL CONTROL DESIGN FOR HVAC SYSTEMS Mehdi Maasoumy,

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

2014-01-01T23:59:59.000Z

14

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

15

Measuring Advances in HVAC Distribution System Design  

E-Print Network [OSTI]

Gabel and Andresen, HVAC Secondary Toolkil. Atlanta: ASHRAE,P_02 Measuring Advances in HVAC Distribution System Designdesign and operation of the HVAC thermal distribution system

Franconi, E.

2011-01-01T23:59:59.000Z

16

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

17

Wireless Demand Response Controls for HVAC Systems  

E-Print Network [OSTI]

Response Controls for HVAC Systems Clifford Federspiel,tests. Figure 5: Specific HVAC electric power consumptioncontrol, demand response, HVAC, wireless Executive Summary

Federspiel, Clifford

2010-01-01T23:59:59.000Z

18

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

19

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

20

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

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

MODELING AND SIMULATION OF HVAC FAULTS IN ENERGYPLUS  

E-Print Network [OSTI]

Methodology for Secondary HVAC Systems, Doctoral Thesis,2002, Particulate Fouling of HVAC Heat Exchangers, Doctoraland diagnosis strategy for HVAC systems involving sensor

Basarkar, Mangesh

2013-01-01T23:59:59.000Z

22

Modeling and Measurement Constraints in Fault Diagnostics for HVAC Systems  

E-Print Network [OSTI]

in Fault Diagnostics for HVAC Systems Massieh Najafi 1 ,tools for determining HVAC diagnostics, methods todetect faults in HVAC systems are still generally

Najafi, Massieh

2010-01-01T23:59:59.000Z

23

Fault Detection and Diagnosis in Building HVAC Systems  

E-Print Network [OSTI]

Wright, “Condition monitoring in HVAC subsystems using firstmonitoring packaged HVAC equipment. ASHRAE Transactions”,Detection and Diagnosis of HVAC Systems Using Support Vector

Najafi, Massieh

2010-01-01T23:59:59.000Z

24

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

E-Print Network [OSTI]

ABORATORY Comparisons of HVAC Simulations between EnergyPlusemployer. Comparisons of HVAC Simulations between EnergyPlusThis paper compares HVAC simulations between EnergyPlus and

Hong, Tianzhen

2009-01-01T23:59:59.000Z

25

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

26

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

27

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

28

Modeling and Identification for HVAC Systems.  

E-Print Network [OSTI]

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

Scotton, Francesco

2012-01-01T23:59:59.000Z

29

Cooperative Control of Air Flow for HVAC Systems  

E-Print Network [OSTI]

in a variable air volume HVAC system,” Energy, vol. 21, no.Global optimization for overall HVAC systems-part I problemGlobal optimization for overall HVAC systems-part II problem

Shuai, Liu; Lihua, Xie

2013-01-01T23:59:59.000Z

30

Comparison of Control Strategies for Energy Efficient Building HVAC Systems  

E-Print Network [OSTI]

optimal control design for HVAC systems. In Dynamic SystemOpti- mal control of HVAC systems in the presence of imper-consumption minimization of hvac sys- tems using model

Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2014-01-01T23:59:59.000Z

31

Improving efficiency of a vehicle HVAC system with comfort modeling...  

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

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

32

Development of a High-Efficiency Zonal Thermoelectric HVAC System...  

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

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

33

Energy Efficient HVAC System for Distributed Cooling/Heating...  

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

Efficient HVAC System for Distributed CoolingHeating with Thermoelectric Devices Energy Efficient HVAC System for Distributed CoolingHeating with Thermoelectric Devices 2012 DOE...

34

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

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

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

35

Cold Vacuum Drying facility HVAC system design description  

SciTech Connect (OSTI)

This System Design Description (SDD) addresses the HVAC system for the CVDF. The CVDF HVAC system consists of five subsystems: (1) Administration building HVAC system; (2) Process bay recirculation HVAC system; (3) Process bay local exhaust HVAC and process vent system; (4) Process general supply/exhaust HVAC system; and (5) Reference air system. The HVAC and reference air systems interface with the following systems: the fire protection control system, Monitoring and Control System (MCS), electrical power distribution system (including standby power), compressed air system, Chilled Water (CHW) system, drainage system, and other Cold Vacuum Drying (CVD) control systems not addressed in this SDD.

SINGH, G.

2000-09-22T23:59:59.000Z

36

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

37

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

E-Print Network [OSTI]

Practices for Residential HVAC Systems”. Boston, MA. Jump,techniques for measuring HVAC grille air flows". ASHRAEPractices Guide for Residential HVAC Retrofits. LBNL 53592.

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

2003-01-01T23:59:59.000Z

38

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

39

Optimal Control of Building HVAC Systems in the Presence of Imperfect Predictions  

E-Print Network [OSTI]

minimization of building hvac systems using model predictivealgorithm design for hvac systems in energy efficient build-optimal control design for HVAC systems,” in Dynamic System

Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2014-01-01T23:59:59.000Z

40

Co-design of Control Algorithm and Embedded Platformfor Building HVAC Systems  

E-Print Network [OSTI]

algorithm design for hvac systems in energy efficientOptimal control of HVAC systems in the presence of imperfectminimization of building hvac systems using model predictive

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

2013-01-01T23:59:59.000Z

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

Model Predictive Control of HVAC Systems: Implementation and Testing at the University of California, Merced  

E-Print Network [OSTI]

Model Predictive Control of HVAC Systems:    Implementation and  air  conditioning  (HVAC)  account  for  27%  of  the reduction potential of HVAC systems with  active thermal 

Haves, Phillip

2010-01-01T23:59:59.000Z

42

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

E-Print Network [OSTI]

optimal control design for HVAC systems,’’ in Proc. Dynamicelectricity consumption in hvac using learning- based model-algorithm design for hvac systems in energy efficient

Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2012-01-01T23:59:59.000Z

43

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

44

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

45

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

46

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

47

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

48

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

49

The Optimization of Control Parameters for VAV HVAC System Commissioning  

E-Print Network [OSTI]

One of the technical subjects in commissioning for HVAC system is to enhance control performance and time efficiency, while the tuning of the optimal parameters to control HVAC system takes much time and labor in particular. Therefore, we propose a...

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

2006-01-01T23:59:59.000Z

50

Optimal Control of Building HVAC Systems in the Presence of Imperfect Predictions, ASME Dynamic System Control Conference  

E-Print Network [OSTI]

optimal control design for HVAC systems,” in Dynamic Systemalgorithm design for hvac systems in energy efficient build-OPTIMAL CONTROL OF BUILDING HVAC SYSTEMS IN THE PRESENCE OF

Maasoumy, Mehdi

2012-01-01T23:59:59.000Z

51

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.

52

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

53

Modeling and Simulation of HVAC Faulty Operations and  

E-Print Network [OSTI]

effort and coverage: 1) proactive, performance-monitored maintenance; 2) preventive, scheduled to Maintenance Issues Liping Wang, Tianzhen Hong Environmental Energy Technologies Division January 2013 and Simulation of HVAC Faulty Operations and Performance Degradation due to Maintenance Issues Liping Wang

54

The Application of Ultraviolet Germicidal Technology in HVAC Systems  

E-Print Network [OSTI]

One of the most significant issues for today's HVAC (Heating, Ventilation, and Air Conditioning) engineer is Indoor Air Quality (IAQ). Many building owners, operators, and occupants complain of foul odors emanating from HVAC systems...

Taylor, M. J.

2000-01-01T23:59:59.000Z

55

Comparison of Building Energy Modeling Programs: HVAC Systems  

E-Print Network [OSTI]

LBNL-6432E Comparison of Building Energy Modeling Programs: HVAC Systems Xin Zhou1 , Tianzhen Hong2 programs (BEMPs) for HVAC calculations: EnergyPlus, DeST, and DOE-2.1E. This is a joint effort between purposes, BEMPs can be divided into load modules and HVAC system modules. This technical report

56

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

57

Cold Vacuum Drying facility HVAC system design description (SYS 30-1 THRU 30-5)  

SciTech Connect (OSTI)

This document describes the Cold Vacuum Drying Facility (CVDF) heating, ventilation, and air conditioning system (HVAC). The CVDF HVAC system consists of the Administrative building HVAC system, the process bay recirculation HVAC system, the process bay local HVAC and process vent system, the process general supply/exhaust HVAC system, and the Reference air system. These HVAC sub-systems support the CVDF process and provide secondary confinement of contamination and the required filtration of exhaust.

PITKOFF, C.C.

1999-07-02T23:59:59.000Z

58

MODELING AND SIMULATION OF HVAC FAULTS IN ENERGYPLUS  

E-Print Network [OSTI]

Symptoms Decreased boiler efficiency due to the increasedresult in reduced boiler efficiency if the sensor hasboiler and two chillers in the plant loop. The building envelope prescriptive minimums and HVAC system efficiencies

Basarkar, Mangesh

2013-01-01T23:59:59.000Z

59

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

E-Print Network [OSTI]

of commercial building HVAC fan as ancillary service foralgorithm design for hvac systems in energy efficientoptimal control design for HVAC systems,” in Dynamic System

Maasoumy, Mehdi

2014-01-01T23:59:59.000Z

60

Thermal Storage Options for HVAC Systems  

E-Print Network [OSTI]

THERMAL STORAGE OPTIONS FOR HVAC SYSTEMS B. N. Gidwani, P.E. Roy F. Weston, Inc. West Chester, Pennsylvania ABSTRACT With the ever-increasing cost of electricity and the high demand charges levied by utility compa nies, thermal storage... for cooling is rapidly becom ing a widely recognized method to lower cooling costs. There are three maior types of thermal stor age systems: ? Ice Storage: This utilizes the latent heat of fusion of ice for thermal storage. During off Deak periods...

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

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

Reliability and Functional Availability of HVAC Systems  

E-Print Network [OSTI]

RELIABILITY AND FUNCTIONAL AVAILABILITY OF HVAC SYSTEMS Sonny Myrefelt Dep. of Build. Serv. Eng., KTH, 10044 Stockholm, Sweden, and SKANSKA Sydost, V?xj?, Sweden Summary This paper presents a model to calculate the reliability... system, therefore, there must be sufficient documentation of design airflow rates. The compulsory ventilation checks performed in Sweden have focused on the importance of maintaining the design air flow rates. More about this activity can be seen...

Myrefelt, S.

2004-01-01T23:59:59.000Z

62

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

SciTech Connect (OSTI)

Almost half of the total energy used in the U.S. buildings is consumed by heating, ventilation and air conditionings (HVAC) according to EIA statistics. Among various driving factors to energy performance of building, operations and maintenance play a significant role. Many researches have been done to look at design efficiencies and operational controls for improving energy performance of buildings, but very few study the impacts of HVAC systems maintenance. Different practices of HVAC system maintenance can result in substantial differences in building energy use. If a piece of HVAC equipment is not well maintained, its performance will degrade. If sensors used for control purpose are not calibrated, not only building energy usage could be dramatically increased, but also mechanical systems may not be able to satisfy indoor thermal comfort. Properly maintained HVAC systems can operate efficiently, improve occupant comfort, and prolong equipment service life. In the paper, maintenance practices for HVAC systems are presented based on literature reviews and discussions with HVAC engineers, building operators, facility managers, and commissioning agents. We categorize the maintenance practices into three levels depending on the maintenance effort and coverage: 1) proactive, performance-monitored maintenance; 2) preventive, scheduled maintenance; and 3) reactive, unplanned or no maintenance. A sampled list of maintenance issues, including cooling tower fouling, boiler/chiller fouling, refrigerant over or under charge, temperature sensor offset, outdoor air damper leakage, outdoor air screen blockage, outdoor air damper stuck at fully open position, and dirty filters are investigated in this study using field survey data and detailed simulation models. The energy impacts of both individual maintenance issue and combined scenarios for an office building with central VAV systems and central plant were evaluated by EnergyPlus simulations using three approaches: 1) direct modeling with EnergyPlus, 2) using the energy management system feature of EnergyPlus, and 3) modifying EnergyPlus source code. The results demonstrated the importance of maintenance for HVAC systems on energy performance of buildings. The research is intended to provide a guideline to help practitioners and building operators to gain the knowledge of maintaining HVAC systems in efficient operations, and prioritize HVAC maintenance work plan. The paper also discusses challenges of modeling building maintenance issues using energy simulation programs.

Wang, Liping; Hong, Tianzhen

2013-01-01T23:59:59.000Z

63

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.

64

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

65

Analysis of a hybrid UFAD and radiant hydronic slab HVAC system  

E-Print Network [OSTI]

Air- Conditioning Engineers HVAC & R Research, vol. 50, Sep.and radiant hydronic slab HVAC system.   Paul RAFTERY a,* ,of a novel integrated HVAC system. This system combines an

Raftery, Paul; Lee, Kwang Ho; Webster, Thomas; Bauman, Fred

2011-01-01T23:59:59.000Z

66

Thinking small leads to efficient HVAC system  

SciTech Connect (OSTI)

The energy efficient design of a Park Avenue office tower is discussed. The 27 story, 260,000 sq. ft. building features an energy efficient HVAC system, including separate mechanical rooms on each floor and a pre-cooling coil utilizing water from a cooling tower. The building was designed so that condenser water from the cooling tower is run through a pre-cooling coil on each floor in order to provide free cooling before the water goes through the condenser coil. The building also uses a Honeywell energy management system to control the start and stop of various mechanical equipment according to outside conditions and building loads. (MJF)

Not Available

1981-06-01T23:59:59.000Z

67

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...

68

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

69

Design and tuning of robust PID controller for HVAC systems  

SciTech Connect (OSTI)

This paper concerns the development of a new design and tuning method for use with robust proportional-plus-integral-plus-derivative (PID) controllers that are commonly used in the heating, ventilating, and air-conditioning (HVAC) fields. The robust PID controller is designed for temperature control of a single-zone environmental space. Although the dynamics of environmental space are described by higher-order transfer functions, most HVAC plants are approximated by first-order lag plus deadtime systems. Its control performance is examined for this commonly approximated controlled plant. Since most HVAC plants are complex with nonlinearity, distributed parameters, and multivariables, a single set of PID gains does not necessarily yield a satisfactory control performance. For this reason, the PID controller must be designed as a robust control system considering model uncertainty caused by changes in characteristics of the plant. The PID gains obtained by solving a two-disk type of mixed sensitivity problem can be modified by contrast to those tuned by the traditional Ziegler-Nichols rule. The results, which are surprisingly simple, are given as linear functions of ratio of deadtime to time constant for robustness. The numerical simulation and the experiments on a commercial-size test plant for air conditioning suggest that the robust PID controller proposed in this paper is effective enough for practical applications.

Kasahara, Masato; Matsuba, Tadahiko; Kuzuu, Yoshiaki; Yamazaki, Takanori; Hashimoto, Yukihiro; Kamimura, Kazuyuki; Kurosu, Shigeru

1999-07-01T23:59:59.000Z

70

Energy efficient HVAC system features thermal storage and heat recovery  

SciTech Connect (OSTI)

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

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

1994-03-01T23:59:59.000Z

71

HVAC & Building Management Control System Energy Efficiency Replacements  

SciTech Connect (OSTI)

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

Hernandez, Adriana

2012-09-21T23:59:59.000Z

72

SURFACE INDUSTRIAL HVAC SYSTEM DESCRIPTION DOCUMENT  

SciTech Connect (OSTI)

The purpose of this system description document (SDD) is to establish requirements that drive the design of the surface industrial heating, ventilation, and air-conditioning (HVAC) system and its bases to allow the design effort to proceed to license application. This SDD will be revised at strategic points as the design matures. This SDD identifies the requirements and describes the system design, as it currently exists, with emphasis on attributes of the design provided to meet the requirements. This SDD is an engineering tool for design control; accordingly, the primary audience and users are design engineers. This SDD is part of an iterative design process. It leads the design process with regard to the flowdown of upper tier requirements onto the system. Knowledge of these requirements is essential to performing the design process. The SDD follows the design with regard to the description of the system. The description that provided in this SDD reflects the current results of the design process.

M.M. Ansari

2005-04-05T23:59:59.000Z

73

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

74

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

75

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.

76

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

E-Print Network [OSTI]

Modeling and Measurement Constraints in Fault Diagnostics for HVAC Systems Massieh Najafi1 , David for determining HVAC diagnostics, methods to detect faults in HVAC systems are still generally undeveloped. Most in a substantial increase in energy use. For example, failure of an HVAC fan may prevent cool air from one

77

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

78

A PDI for your HVAC System  

Broader source: Energy.gov [DOE]

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

79

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

80

A standard simulation testbed for the evaluation of control algorithms & strategies related to variable air volume HVAC systems  

E-Print Network [OSTI]

The parameters for a dynamic, computer simulation model were developed. The parameters characterize the physical and geometric properties of a building shell, the internal and external building loads, the buildings secondary ...

DeSimone, Mark

1995-01-01T23:59:59.000Z

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

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

SciTech Connect (OSTI)

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

82

Review of Residential Low-Load HVAC Systems  

SciTech Connect (OSTI)

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

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

2013-09-01T23:59:59.000Z

83

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

84

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

SciTech Connect (OSTI)

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

Jiang Zhu; Yong X. Tao

2011-11-01T23:59:59.000Z

85

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

E-Print Network [OSTI]

solar-thermal- assisted hvac system. Energy and Buildings, [of a Solar-Assisted HVAC System with Thermal Storage A.of a solar-assisted HVAC system with thermal storage. Energy

Mammoli, Andrea

2014-01-01T23:59:59.000Z

86

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

87

Using measured equipment load profiles to "right-size" HVAC systems and reduce energy use in laboratory buildings (Pt. 2)  

E-Print Network [OSTI]

load profiles to “right-size” HVAC systems and reduce energyGeorgia. ASHRAE [1999]. HVAC Applications Handbook 1999.Inefficiency of a Common Lab HVAC System,” presented at the

Mathew, Paul; Greenberg, Steve; Frenze, David; Morehead, Michael; Sartor, Dale; Starr, William

2008-01-01T23:59:59.000Z

88

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.

89

NREL research determines optimal HVAC system design for proper air mixing and thermal comfort in homes.  

E-Print Network [OSTI]

NREL research determines optimal HVAC system design for proper air mixing and thermal comfort in homes. As U.S. homes become more energy efficient, heating, ventilation, and cooling (HVAC) systems

90

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

91

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

92

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

93

Multicriteria Genetic Tuning for the Optimization and Control of HVAC Systems  

E-Print Network [OSTI]

Multicriteria Genetic Tuning for the Optimization and Control of HVAC Systems Rafael Alcala1, Jose of genetic algorithms for the optimization and control of Heating, Ventilating and Air Conditioning (HVAC of these systems. An optimum operation of the HVAC systems is a necessary condition for mini- mizing energy

Casillas Barranquero, Jorge

94

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

95

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

96

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.

97

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

98

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

99

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.

100

Measuring Advances in HVAC Distribution System Design  

SciTech Connect (OSTI)

Substantial commercial building energy savings have been achieved by improving the performance of the HV AC distribution system. The energy savings result from distribution system design improvements, advanced control capabilities, and use of variable-speed motors. Yet, much of the commercial building stock remains equipped with inefficient systems. Contributing to this is the absence of a definition for distribution system efficiency as well as the analysis methods for quantifying performance. This research investigates the application of performance indices to assess design advancements in commercial building thermal distribution systems. The index definitions are based on a first and second law of thermodynamics analysis of the system. The second law or availability analysis enables the determination of the true efficiency of the system. Availability analysis is a convenient way to make system efficiency comparisons since performance is evaluated relative to an ideal process. A TRNSYS simulation model is developed to analyze the performance of two distribution system types, a constant air volume system and a variable air volume system, that serve one floor of a large office building. Performance indices are calculated using the simulation results to compare the performance of the two systems types in several locations. Changes in index values are compared to changes in plant energy, costs, and carbon emissions to explore the ability of the indices to estimate these quantities.

Franconi, E.

1998-05-01T23:59:59.000Z

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.


101

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.

102

Measuring rates of outdoor airflow into HVAC systems  

SciTech Connect (OSTI)

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

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

2002-10-01T23:59:59.000Z

103

Using Energy Management Control Systems for HVAC Operational Diagnostics  

E-Print Network [OSTI]

USING ENERGY MANAGEMENT CONTROL SYSTEMS FOR HVAC OPERATIONAL DIAGNOSTICS Karl Stum, P.E. Portland Energy Conservation, Inc. 92 1 SW Washington, Suite 3 12 Portland, OR 97205 503-248-4636 Fax 503-295-0820 ABSTRACT The power and flexibility... Proceedings, June 1997. Meyers, S.; E. Mills; A. Chen; L. Demsetz "Building Data Visualization for Diagnostics," ASHRAE Journal, June 1996. PECl (Portland Energy Conservation, Inc.). Energy Management C0ntrof Systems-A Practical Guiak, 1997. Sparks, R...

Stum, K.

1998-01-01T23:59:59.000Z

104

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

105

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

106

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

107

Design of Control Systems for HVAC Applications  

E-Print Network [OSTI]

to heating, ventilating, and air conditioning systems has become an integral part of energy management. The first phase of the program will address the problem of selection of a type of system that will be cost and energy efficient, with a minimum...

Smith, A. L.

1984-01-01T23:59:59.000Z

108

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

E-Print Network [OSTI]

. For these reasons, ground-coupled heat pump systems are potentially more efficient than conven- tional air-to-air -Source Heat Pump System Models in an Integrated Building and System Simulation Environment. HVAC&R Research 12 and Validation of Ground-Source Heat Pump System Models in an Integrated Building and System Simulation

109

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

SciTech Connect (OSTI)

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

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

2003-09-01T23:59:59.000Z

110

Wireless Demand Response Controls for HVAC Systems  

SciTech Connect (OSTI)

The objectives of this scoping study were to develop and test control software and wireless hardware that could enable closed-loop, zone-temperature-based demand response in buildings that have either pneumatic controls or legacy digital controls that cannot be used as part of a demand response automation system. We designed a SOAP client that is compatible with the Demand Response Automation Server (DRAS) being used by the IOUs in California for their CPP program, design the DR control software, investigated the use of cellular routers for connecting to the DRAS, and tested the wireless DR system with an emulator running a calibrated model of a working building. The results show that the wireless DR system can shed approximately 1.5 Watts per design CFM on the design day in a hot, inland climate in California while keeping temperatures within the limits of ASHRAE Standard 55: Thermal Environmental Conditions for Human Occupancy.

Federspiel, Clifford

2009-06-30T23:59:59.000Z

111

A Quasi-Dynamic HVAC and Building Simulation Methodology  

E-Print Network [OSTI]

to their design and simulated in a computationally efficient manner. The methodology represents a system as interconnected, object-oriented sub-models known as components. Fluids and their local properties are modeled using discrete, incompressible objects known...

Davis, Clinton Paul

2012-07-16T23:59:59.000Z

112

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

113

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

114

Measurements of Smoke Characteristics in HVAC Ducts   

E-Print Network [OSTI]

The characteristics of smoke traveling in an HVAC duct have been observed along with the response of selected duct smoke detectors. The simulated HVAC system consists of a 9 m long duct, 0.45 m in diameter. An exhaust fan is placed at one end...

Wolin, Steven D; Ryder, Noah L; Leprince, Frederic; Milke, James; Mowrer, Frederick; Torero, Jose L

2001-01-01T23:59:59.000Z

115

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

116

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

117

RELIABILITY ANALYSIS OF THE ELECTRICAL POWER DISTRIBUTION SYSTEM TO SELECTED PORTIONS OF THE NUCLEAR HVAC SYSTEM  

SciTech Connect (OSTI)

A design requirement probability of 0.01 or less in a 4-hour period ensures that the nuclear heating, ventilation, and air-conditioning (HVAC) system in the primary confinement areas of the Dry Transfer Facilities (DTFs) and Fuel Handling Facility (FHF) is working during a Category 1 drop event involving commercial spent nuclear fuel (CSNF) assemblies (BSC 2004a , Section 5.1.1.48). This corresponds to an hourly HVAC failure rate of 2.5E-3 per hour or less, which is contributed to by two dominant causes: equipment failure and loss of electrical power. Meeting this minimum threshold ensures that a Category 1 initiating event followed by the failure of HVAC is a Category 2 event sequence. The two causes for the loss of electrical power include the loss of offsite power and the loss of onsite power distribution. Thus, in order to meet the threshold requirement aforementioned, the failure rate of mechanical equipment, loss of offsite power, and loss of onsite power distribution must be less than or equal to 2.5E-3 per hour for the nuclear HVAC system in the primary confinement areas of the DTFs and FHF. The loss of offsite power occurs at a frequency of 1.1E-5 per hour (BSC 2004a, Section 5.1.1.48). The purpose of this analysis is to determine the probability of occurrence of the unavailability of the nuclear HVAC system in the primary confinement areas of the DTFs and FHF due to loss of electrical power. In addition, this analysis provides insights on the contribution to the unavailability of the HVAC system due to equipment failure. The scope of this analysis is limited to finding the frequency of loss of electrical power to the nuclear HVAC system in the primary confinement areas of the DTFs and FHF.

N. Ramirez

2004-12-16T23:59:59.000Z

118

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.

119

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

120

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

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

Joint-Frequency Bins versus Conventional Bin Weather Data in Analysis of HVAC System Operation  

E-Print Network [OSTI]

this study the use of joint-frequency bins has relative added value to the analysis of HVAC system operation depending on whether the system is dominated by ventilation loads....

Jones, A.; Baltazar, J. C.; Claridge, D. E.

122

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

E-Print Network [OSTI]

], microorganisms [2], in the case of abnormal maintenance. Because there are all kinds of components in the duct systems, tapping the law of particle distribution in HVAC systems is not an easy work. Generally speaking, flow in the duct system... is turbulent except those in some kind of components like filters. Particle movement, especially particle deposition, is strongly related to organized structures in near-wall turbulence [3]. The mechanisms governing particle transport in HVAC systems...

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

2006-01-01T23:59:59.000Z

123

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

124

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

E-Print Network [OSTI]

D. Sucic and P. Xu. 2002. HVAC Component Data Modeling Using2001. BS-8 project: IFC HVAC extension schemata. http://IFC HVAC INTERFACE TO ENERGYPLUS – A CASE OF EXPANDED

Bazjanac, Vladimir; Maile, Tobias

2004-01-01T23:59:59.000Z

125

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

126

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

127

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

128

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

129

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

E-Print Network [OSTI]

ENERGY MASTER PLANS for SUSTAINABLE, HIGH PERFORMANCE HVAC & ASSOCIATED SYSTEMS for HOT AND HUMID CLIMATES Grahame E. Maisey, P.E. Beverly Milestone Chief Engineer President GEMCO Energy Master Planners GEMCO Energy... net zero energy, high performance productivity and long-life systems for minimal material use. This is achieved by a number of small, easy steps and at a rate and schedule determined by the owner. Projects will eventually reduce HVAC...

Maisey, G. E.; Milestone, B.

2004-01-01T23:59:59.000Z

130

Outdoor airflow into HVAC systems: An evaluation of measurement technologies  

SciTech Connect (OSTI)

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

131

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

132

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

133

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

134

Application of black-box models to HVAC systems for fault detection  

SciTech Connect (OSTI)

This paper describes the application of black-box models for fault detection and diagnosis (FDD) in heating, ventilating, and air-conditioning (HVAC) systems. In this study, multiple-input/single-output (MISO) ARX models and artificial neural network (ANN) models are used. The ARX models are examined for different processes and subprocesses and compared with each other. Two types of models are established--system models and component models. In the case of system models, the HVAC system as a whole is regarded as a black box instead of as a collection of component models. With the component model type, the components of the HVAC system are regarded as separate black boxes.

Peitsman, H.C. [TNO Building and Construction Research, Delft (Netherlands). Dept. of Indoor Environment, Building Physics and Systems; Bakker, V.E. [Univ. of Twente, Enschede (Netherlands). Dept. of Computer Science

1996-11-01T23:59:59.000Z

135

Distributed scheduling for efficient HVAC precooling operations  

E-Print Network [OSTI]

of supply and return fans for HVAC systems under di?erentOp- timal Scheduling of HVAC Pre-cooling Operations withScheduling for E?cient HVAC Pre-cooling Operations ? Yang

Yang, Su

2014-01-01T23:59:59.000Z

136

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

E-Print Network [OSTI]

be ordered by ISSO. http://www.isso.nl/ Elkhuizen P.A. , Peitsman H.C., ? A new design guideline for the heating and cooling curve in AHU of HVAC systems (a method for the optimal adjustment of AHU in HVAC systems) ?, A40-E-M4-NL-TNO-1, IEA Annex 40...

2004-01-01T23:59:59.000Z

137

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

E-Print Network [OSTI]

and incorporated into HVAC design for medium-to-large buildings, it is possible to structure system arrangements that reduce energy operating costs very significantly compared to conventional all-air VAV systems and also to all-air VAV ice thermal storage systems...

Meckler, G.

1989-01-01T23:59:59.000Z

138

Integrated high efficiency blower apparatus for HVAC systems  

DOE Patents [OSTI]

An integrated centrifugal blower wheel for a heating, ventilation and air conditioning (HVAC) blower unit includes a first blade support, a second blade support, and a plurality of S-shaped blades disposed between the first and second blade supports, wherein each of the S-shaped blades has a trailing edge bent in a forward direction with respect to a defined direction of rotation of the wheel.

Liu, Xiaoyue; Weigman, Herman; Wang, Shixiao

2007-07-24T23:59:59.000Z

139

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

140

Flexibility of Commercial Building HVAC Fan as Ancillary Service for Smart Grid  

E-Print Network [OSTI]

optimal control design for HVAC systems,” in Dynamic Systemminimization of building hvac systems using model pre-algorithm design for hvac systems in energy efficient

Maasoumy, Mehdi

2013-01-01T23:59:59.000Z

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

Residential commissioning to assess envelope and HVAC system performance  

SciTech Connect (OSTI)

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

Wray, Craig P.; Sherman, Max H.

2001-08-31T23:59:59.000Z

142

Monitoring-based HVAC Commissioning of an Existing Office Building for Energy Efficiciency  

E-Print Network [OSTI]

Dascalaki E, Gaglia A. HVAC and indoor thermal conditions inCommissioning of Building HVAC Systems for Improving Energyand diagnosis strategy for HVAC systems involving sensor

Wang, Liping

2014-01-01T23:59:59.000Z

143

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

144

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.

145

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.

146

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

147

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

148

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

149

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

150

Energy Conservation Experiences with HVAC Systems in the High Humidity Climate, A Case History  

E-Print Network [OSTI]

ENERGY CONSERVATION EXPERIENCES VITH HVAC SYSTEMS IN THE HIGH HUMIDITY CLIMATE. A CASE HISTORY Tom R. Todd Principa 1 Engineering Sciences, Inc. Memphis, Tennessee 38112 The purpose of this paper is to discuss sev- era 1 commonly encountered.... Condensation during normal sys tern opere- tion. It was frequently found that moisture in the room air would condense on cold surfaces around supply air diffusers during normal opera- tion of the system. Direct evidence of this was simply the presence...

Todd, T. R.

1985-01-01T23:59:59.000Z

151

Comparative guide to emerging diagnostic tools for large commercial HVAC systems  

SciTech Connect (OSTI)

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

152

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

153

IMPLEMENTATION OF A HYBRID CONTROLLER FOR CRITICAL BUILDING HVAC SYSTEMS  

SciTech Connect (OSTI)

Many industrial facilities utilize pressure control gradients to prevent migration of hazardous species from containment areas to occupied zones, often using Proportional-Integral-Derivative (PID) control systems. When operators rebalance the plant, variation from the desired gradients can occur and the operating conditions can change enough that the PID parameters are no longer adequate to maintain a stable system. As the goal of the ventilation control system is to optimize the pressure gradients and associated flows for the plant, Linear Quadratic Tracking (LQT) is a method that provides a time-based approach to guiding plant interactions. However, LQT methods are susceptible to modeling and measurement errors, and therefore the additional use of soft computing methods is proposed for implementation to account for these errors and nonlinearities. The performance of the resulting hybrid controller is demonstrated through simulation and experimental testing as compared to a representative PID controller.

Craig Rieger

2008-11-01T23:59:59.000Z

154

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

E-Print Network [OSTI]

effect from CO2 emission resulting from the combustion of fossil fuels in utility power plants and the use of chlorofluorocarbon refrigerants, which is currently thought to affect depletion of the ozone layer. The ban on fluorocarbon fluids has been...LIFE CYCLE COST ANALYSIS OF WASTE HEAT OPERATED ABSORPTION COOLING SYSTEMS FOR BUILDING HVAC APPLICATIONS V. Murugavel and R. Saravanan Refrigeration and Air conditioning Laboratory Department of Mechanical Engineering, Anna University...

Saravanan, R.; Murugavel, V.

2010-01-01T23:59:59.000Z

155

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

156

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.

157

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

158

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

159

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

160

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

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

Thermovote: Participatory Sensing for Efficient Building HVAC Conditioning  

E-Print Network [OSTI]

Thermovote: Participatory Sensing for Efficient Building HVAC Conditioning Varick L. Erickson, Measurement, Performance Keywords HVAC conditioning, PMV, thermal comfort, phones 1 Introduction Recently goal, the service that HVAC systems provide is arguably more important than reducing energy. Before we

Cerpa, Alberto E.

162

Energy Savings Potential of Flexible and Adaptive HVAC Distribution Systems for Office Buildings  

SciTech Connect (OSTI)

It has been understood by architects and engineers that office buildings with easily re-configurable space and flexible mechanical and electrical systems are able to provide comfort that increases worker productivity while using less energy. Raised floors are an example of how fresh air, thermal conditioning, lighting needs, and network access can be delivered in a flexible manner that is not ''embedded'' within the structure. What are not yet documented is how well these systems perform and how much energy they can save. This area is being investigated in phased projects of the 21st Century Research Program of the Air-conditioning and Refrigeration Technology Institute. For the initial project, research teams at the Center for Building Performance and Diagnostics, Pittsburgh, Pennsylvania, and Oak Ridge National Laboratory, Oak Ridge, Tennessee, documented the diversity, performance, and incidence of flexible and adaptive HVAC systems. Information was gathered worldwide from journal and conference articles, case studies, manufactured products and assemblies, and interviews with design professionals. Their report thoroughly describes the variety of system types along with the various design alternatives observed for plenums, diffusers, individual control, and system integration. Many of the systems are illustrated in the report and the authors provide quantitative and qualitative comparisons. Among conclusions regarding key design issues, and barriers to widespread adoption, the authors state that flexible and adaptive HVAC systems, such as underfloor air, perform as well if not better than ceiling-based systems. Leading engineers have become active proponents after their first experience, which is resulting in these flexible and adaptive HVAC systems approaching 10 percent of the new construction market. To encourage adoption of this technology that improves thermal comfort and indoor air quality, follow-on work is required to further document performance. Architects, professional engineers, and commercial real estate developers will benefit from the availability of information that quantifies energy savings, first cost construction differences, and additional operating costs created when office space must be reconfigured to accommodate new tenants.

Loftness, Vivian; Brahme, Rohini; Mondazzi, Michelle; Vineyard, Edward; MacDonald, Michael

2002-06-01T23:59:59.000Z

163

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

SciTech Connect (OSTI)

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

Parker, J.D.

1992-07-01T23:59:59.000Z

164

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

165

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]

such a system is determining the required heat flux. Current guidance in the ASHRAE HVAC Applications Handbook of the hydronic snow melting system. Current guidance in the ASHRAE HVAC Applications Handbook (1) for required-of-snowfall-hours-not-exceeded of 75%, 90%, 95%, 98%, 99% and 100%. This approach is limited by the fact that real systems are almost

166

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

167

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.

168

COMPREHENSIVE DIAGNOSTIC AND IMPROVEMENT TOOLS FOR HVAC-SYSTEM INSTALLATIONS IN LIGHT COMMERCIAL BUILDINGS  

SciTech Connect (OSTI)

Proctor Engineering Group, Ltd. (PEG) and Carrier-Aeroseal LLP performed an investigation of opportunities for improving air conditioning and heating system performance in existing light commercial buildings. Comprehensive diagnostic and improvement tools were created to address equipment performance parameters (including airflow, refrigerant charge, and economizer operation), duct-system performance (including duct leakage, zonal flows and thermal-energy delivery), and combustion appliance safety within these buildings. This investigation, sponsored by the National Energy Technology Laboratory, a division of the U.S. Department of Energy, involved collaboration between PEG and Aeroseal in order to refine three technologies previously developed for the residential market: (1) an aerosol-based duct sealing technology that allows the ducts to be sealed remotely (i.e., without removing the ceiling tiles), (2) a computer-driven diagnostic and improvement-tracking tool for residential duct installations, and (3) an integrated diagnosis verification and customer satisfaction system utilizing a combined computer/human expert system for HVAC performance. Prior to this work the aerosol-sealing technology was virtually untested in the light commercial sector--mostly because the savings potential and practicality of this or any other type of duct sealing had not been documented. Based upon the field experiences of PEG and Aeroseal, the overall product was tailored to suit the skill sets of typical HVAC-contractor personnel.

Abram Conant; Mark Modera; Joe Pira; John Proctor; Mike Gebbie

2004-10-31T23:59:59.000Z

169

Decentralized model predictive control of a multiple evaporator HVAC system  

E-Print Network [OSTI]

and outputs .........................................................................9 Fig. 1.5 Areas of research.................................................................................................16 Fig. 2.1 Entire system....28 Refrigerant flow transducer ..............................................................................43 Fig. 2.29 Energy balance comparison ..............................................................................46 Fig. 3.1 Illustrative example...

Elliott, Matthew Stuart

2009-05-15T23:59:59.000Z

170

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

171

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

172

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

173

Comparison of emerging diagnostic tools for large commercial HVAC systems  

SciTech Connect (OSTI)

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

Friedman, Hannah; Piette, Mary Ann

2001-04-06T23:59:59.000Z

174

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

175

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

176

Value impact analysis of Generic Issue 143, Availability of Heating, Ventilation, Air Conditioning (HVAC) and Chilled Water Systems  

SciTech Connect (OSTI)

This study evaluates the values (benefits) and impacts (costs) associated with potential resolutions to Generic Issue 143, ``Availability of HVAC and Chilled Water Systems.`` The study identifies vulnerabilities related to failures of HVAC, chilled water, and room cooling systems; develops estimates of room heatup rates and safety-related equipment vulnerabilities following losses of HVAC/room cooler systems; develops estimates of the core damage frequencies and public risks associated with failures of these systems; develops three proposed resolution strategies to this generic issue; and performs a value/impact analysis of the proposed resolutions. Existing probabilistic risk assessments for four representative plants, including one plant from each vendor, form the basis for the core damage frequency and public risk calculations. Both internal and external events were considered. It was concluded that all three proposed resolution strategies exceed the $1,000/person-rem cost-effectiveness ratio. Additional evaluations were performed to develop ``generic`` insights on potential design-related and configuration-related vulnerabilities and potential high-frequency ({approximately}1E-04/RY) accident sequences that involve failures of HVAC/room cooling functions. It was concluded that, although high-frequency accident sequences may exist at some plants, these high-frequency sequences are plant-specific in nature or have been resolved through hardware and/or operational changes. The plant-specific Individual Plant Examinations are an effective vehicle for identification and resolution of these plant-specific anomalies and hardware configurations.

Daling, P.M.; Marler, J.E.; Vo, T.V.; Phan, H.; Friley, J.R. [Pacific Northwest Lab., Richland, WA (United States)

1993-11-01T23:59:59.000Z

177

Strategy Guideline: HVAC Equipment Sizing  

SciTech Connect (OSTI)

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

Burdick, A.

2012-02-01T23:59:59.000Z

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

DEMONSTRATION OF A HYBRID INTELLIGENT CONTROL STRATEGY FOR CRITICAL BUILDING HVAC SYSTEMS  

SciTech Connect (OSTI)

Many industrial facilities utilize pressure control gradients to prevent migration of hazardous species from containment areas to occupied zones, often using Proportional-Integral-Derivative (PID) control. Within these facilities, PID control is often inadequate to maintain desired performance due to changing operating conditions. As the goal of the Heating, Ventilation and Air-Conditioning (HVAC) control system is to optimize the pressure gradients and associated flows for the plant, Linear Quadratic Tracking (LQT) provides a time-based approach to guiding plant interactions. However, LQT methods are susceptible to modeling and measurement errors, and therefore a hybrid design using the integration of soft control methods with hard control methods is developed and demonstrated to account for these errors and nonlinearities.

Craig Rieger; D. Subbaram Naidu

2010-06-01T23:59:59.000Z

180

Airflow regulation in variable-speed systems for residential HVAC applications  

SciTech Connect (OSTI)

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

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

1996-11-01T23:59:59.000Z

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

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

182

Hvac systems as a tool in controlling indoor air quality: A literature review. Final report, May-August 1993  

SciTech Connect (OSTI)

The report gives results of a review of literature on the use of heating, ventilation, and air-conditioning (HVAC) systems to control indoor air quality (IAQ). One conclusion of the review is that HVAC systems very often contribute to the indoor air pollution because of (1) poor system maintenance, (2) overcrowding or the introduction of new pollution-generating sources with buildings, and (3) the location of outdoor air near ambient pollution sources. Another conclusion is that failure to trade off between energy conservation and employee productivity may result in increased IAQ problems. The report contents are based on literature survey covering the years 1988 through 1993, involving 60 references, 32 of which are cited in the report.

Samfield, M.M.

1995-12-01T23:59:59.000Z

183

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

E-Print Network [OSTI]

LBNL- 49026 Report on HVAC Option Selections for aTable 3. High performance HVAC system filter selectionDrop ("H 2 O) Appendix A – RC HVAC working drawings. Figure

2001-01-01T23:59:59.000Z

184

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

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

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

185

Indirect Benefits (Increased Roof Life and HVAC Savings) from...  

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

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

186

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

187

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

188

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

189

Module Development and Simulation of the Variable Refrigerant Flow Air Conditioning System under Cooling Conditions in Energyplus  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency Vol.IV-1-2 Module Development and Simulation of the Variable Refrigerant Flow Air Conditioning System under Cooling Conditions in Energyplus Yanping Zhou Jingyi..., especially for those who ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency Vol.IV-1-2 show some interest about high-efficiency systems like VRF, it becomes of interest to compare the VRF to other systems and evaluate VRF?s performance...

Zhou, Y.; Wu, J.; Wang, R.; Shiochi, S.

2006-01-01T23:59:59.000Z

190

Measurement of HVAC system performance and local ventilation using passive perfluorocarbon tracer technology  

SciTech Connect (OSTI)

In April of 1993, two (2) perfluorocarbon tracer (PFT) ventilation/indoor air quality assessment tests were performed in the Gleeson Hall building of the SUNY Farmingdale campus. The building was being modified, in part, as a result of significant occupant complaints of perceived poor air quality. The four story building had a basement first floor with air supplied normally by an HVAC system labelled as AC1. During this study, AC1 was inoperational and the basement interior rooms (walls) were primarily gone; the other three floors were still being used for classes. It is possible that a sense of poor air quality may have been perceived by first-floor occupants because they were working in the basement, but this issue could not be addressed. The second floor had two (2) lecture halls--Rm 202 (handled by AC4) and Rm 204 (handled by AC5); the balance of the second floor interior rooms and corridors was split between two other air handling systems, AC2 for the west side of the building and AC3 for the east side. The remaining 3rd and 4th floors were also split about evenly between AC2 and AC3. The perimeter rooms, equipped with wall units having their own outside air (OA) source plus centralized return air (RA) bypasses, were not included in this testing which was restricted to the basement floor (1st floor) and the four operating air handling systems, AC2 to AC5, during Test 1 and only AC2 to AC5 during Test 2. Two types of tests were performed using the full suite of 5 PFT types available. The first test was designed to measure the infiltration, exfiltration, and air exchange between the 5 AC zones above and the second test used the 5th tracer, which had been in the basement, as a distributed source throughout the four other zones to act as a surrogate pollutant source. This report provides final conclusions of both tests and suggestions regarding its usefulness in similar building ventilation and indoor air quality assessments.

Dietz, R.N.; Goodrich, R.W.

1995-06-01T23:59:59.000Z

191

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

SciTech Connect (OSTI)

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

192

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.

193

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

194

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

E-Print Network [OSTI]

Efficiency Choice 6.3 New Home HVAC System Choice 6.4. NewJuly. EPRI. 1990. REEPS 2.0 HVAC Model Logic, prepared by1990. Review of Equipment HVAC Choice Parameters. Cambridge

Johnson, F.X.

2010-01-01T23:59:59.000Z

195

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

E-Print Network [OSTI]

fault detection method using the global optimization program Solver® (Frontline Systems, 2000) coupled to a simplified simulation program, which is a coding of the ASHRAE 'Simplified Energy Analysis Procedure' (Knebel, 1983). This approach uses...

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

2004-01-01T23:59:59.000Z

196

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

E-Print Network [OSTI]

at Oklahoma State University (http://www.hvac.okstate.edu). The correct citation for the paper is: Spitler, J.D. 2007. Research Planning for the HVAC&R Industry. HVAC&R Research 13(5):681- 682. #12;VOLUME 13, NUMBER 5 HVAC&R RESEARCH SEPTEMBER 2007 681 EDITORIAL Research Planning for the HVAC&R Industry Jeffrey D

197

Study on Control Performance of HVAC System or Interior Zone and Perimeter Zone in Office Building; Estimation of Optimal PI Tuning in Cooling Operation  

E-Print Network [OSTI]

In office buildings there are generally two HVAC systems installed, one in the perimeter zone (PZ) and one in the interior zone (IZ), and the temperatures of each zone are independently controlled. In the present paper, in order to the solve problem...

Maehara, K.; Sagara, N.

2007-01-01T23:59:59.000Z

198

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

SciTech Connect (OSTI)

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

Not Available

2005-09-01T23:59:59.000Z

199

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]

SPECIFY UNITS) when heat (of HVAC) is turned off?using the heat (from HVAC)? A. B. C. D. January Februaryair conditionmg (from HVAC)? A. B. C. D. January February

Shendell, Derek Garth

2010-01-01T23:59:59.000Z

200

Free-cooling: A total HVAC design concept  

SciTech Connect (OSTI)

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

Janeke, C.E.

1982-01-01T23:59:59.000Z

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

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

SciTech Connect (OSTI)

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

202

Distributed Control of HVAC&R Networks  

E-Print Network [OSTI]

retains a degree of modularity—changing one component does not require changing all controllers. The final contribution is a new distributed optimization algorithm that is rooted in distributed MPC and is especially motivated by HVAC&R systems...

Elliott, Matthew Stuart

2013-07-05T23:59:59.000Z

203

HVAC Maintenance and Technologies  

Broader source: Energy.gov [DOE]

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

204

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

205

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

206

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

207

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

208

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.

209

Flexibility of Commercial Building HVAC Fan as Ancillary Service for Smart Grid  

E-Print Network [OSTI]

Efficient Building Control Systems, Smart Grid and AircraftCommercial Building HVAC Fan as Ancillary Service for Smart

Maasoumy, Mehdi

2013-01-01T23:59:59.000Z

210

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

E-Print Network [OSTI]

PENNSTATE Department of Energy and Mineral Engineering Spring 2013 Solar Innovations - HVAC and Waste Stream Analysis Overview There are two problems that were voiced by Solar Innovations, HVAC system

Demirel, Melik C.

211

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

212

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

213

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

E-Print Network [OSTI]

parameters. There are a total of eight scenarios considered in this simulation. The simulation tool was developed based on Excel. The control parameters examined include room temperature, cold deck temperature, hot deck temperature, pump pressure, and fan...

Ma, Liang

2012-02-14T23:59:59.000Z

214

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

SciTech Connect (OSTI)

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

Stetiu, C.; Feustel, H.E.

1998-07-01T23:59:59.000Z

215

HVAC Installed Performance  

Broader source: Energy.gov [DOE]

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

216

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

217

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

218

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

219

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

SciTech Connect (OSTI)

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

220

WEATHER SEQUENCES FOR PREDICTING HVAC SYSTEM BEHAVIOUR IN RESIDENTIAL UNITS LOCATED IN TROPICAL CLIMATES.  

E-Print Network [OSTI]

. The sensations of thermal discomfort in these buildings have increased the energy consumption by the use. This development needs precise information about the effect of climate patterns on buildings. For energy find three types of database for the energy buildings simulations: - Simulations can be made by using

Boyer, Edmond

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

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

222

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

223

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

224

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.

225

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

226

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

227

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

228

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

229

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

230

Analysis of a hybrid UFAD and radiant hydronic slab HVAC system  

E-Print Network [OSTI]

speed, and the cooling tower supply water temperature set-operates in ‘free-cooling’ mode to supply cool water to thealso include a cooling system that can supply cool water to

Raftery, Paul; Lee, Kwang Ho; Webster, Thomas; Bauman, Fred

2011-01-01T23:59:59.000Z

231

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

232

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

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe U.S. Improving Fan System Performance a

233

Improving efficiency of a vehicle HVAC system with comfort modeling, zonal  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe U.S. Improving Fan System Performance a PumpingReduceddesign,

234

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

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

Let's start with a basic tenet: electric space heaters are less efficient than HVAC systems. I cannot replace my heating system with room heaters if I want to save money....

235

Classroom HVAC: Improving ventilation and saving energy -- field study plan  

SciTech Connect (OSTI)

The primary goals of this research effort are to develop, evaluate, and demonstrate a very practical HVAC system for classrooms that consistently provides classrooms (CRs) with the quantity of ventilation in current minimum standards, while saving energy, and reducing HVAC-related noise levels. This research is motivated by the public benefits of energy efficiency, evidence that many CRs are under-ventilated, and public concerns about indoor environmental quality in CRs. This document provides a summary of the detailed plans developed for the field study that will take place in 2005 to evaluate the energy and IAQ performance of a new classroom HVAC technology. The field study will include measurements of HVAC energy use, ventilation rates, and IEQ conditions in 10 classrooms with the new HVAC technology and in six control classrooms with a standard HVAC system. Energy use and many IEQ parameters will be monitored continuously, while other IEQ measurements will be will be performed seasonally. Continuously monitored data will be remotely accessed via a LonWorks network. Instrument calibration plans that vary with the type of instrumentation used are established. Statistical tests will be employed to compare energy use and IEQ conditions with the new and standard HVAC systems. Strengths of this study plan include the collection of real time data for a full school year, the use of high quality instrumentation, the incorporation of many quality control measures, and the extensive collaborations with industry that limit costs to the sponsors.

Apte, Michael G.; Faulkner, David; Hodgson, Alfred T.; Sullivan, Douglas P.

2004-10-14T23:59:59.000Z

236

Advanced control strategies for HVAC&R systems—An overview: Part II: Soft and fusion control  

SciTech Connect (OSTI)

A chronological overview of the advanced control strategies for HVAC&R is presented. The overview focuses on hard-computing or control techniques, such as proportional-integral-derivative, optimal, nonlinear, adaptive, and robust; soft-computing or control techniques, such as neural networks, fuzzy logic, genetic algorithms; and the fusion or hybrid of hard and soft control techniques. Part I focused on hardcontrol strategies; Part II focuses on soft and fusion control and some future directions in HVA&R research. This overview is not intended to be an exhaustive survey on this topic, and any omissions of other works is purely unintentional.

D. Subbaram Naidu; Craig G. Rieger

2011-04-01T23:59:59.000Z

237

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

238

Personalized HVAC control system  

E-Print Network [OSTI]

We present a novel method of building comfort control, focused around the occupant. Custom sensing, communication, and actuation hardware were developed to locate users in a building, and measure various parameters directly ...

Feldmeier, Mark Christopher

239

Comparative Study of Availability on Energy/Environment Commissioning Using Existing HVAC Simulation Programs for a Model Building  

E-Print Network [OSTI]

limit of VAV air flow rate: 50% of minimum ? Heat Source System: Thermal storage system using AHP(Air-soure HeatPumps) ? Performance characteristics of fan, pump, heat pump are defined as manufacturer's ? Internal heat gain schedules are set...

Niwa, H.; Nakahara, N.; Okumiya, M.; Suganaga, M.; Tanaka, H.; Pan, S.; Watanabe, T.; Zheng, M.

2004-01-01T23:59:59.000Z

240

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

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

Columbia Water and Light- Residential HVAC Rebate Program  

Broader source: Energy.gov [DOE]

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

242

The Impact of Uncertain Physical Parameters on HVAC Demand Response  

SciTech Connect (OSTI)

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

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

2014-03-01T23:59:59.000Z

243

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

244

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

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

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

245

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

246

A Runtime Verification Framework for Control System Simulation  

SciTech Connect (OSTI)

n a standard workflow for the validation of a control system, the control system is implemented as an extension to a simulator. Such simulators are complex software systems, and engineers may unknowingly violate constraints a simulator places on extensions. As such, errors may be introduced in the implementation of either the control system or the simulator leading to invalid simulation results. This paper presents a novel runtime verification approach for verifying control system implementations within simulators. The major contribution of the approach is the two-tier specification process. In the first tier, engineers model constraints using a domain-specific language tailored to modeling a controller’s response to changes in its input. The language is high-level and effectively hides the implementation details of the simulator, allowing engineers to specify design-level constraints independent of low-level simulator interfaces. In the second tier, simulator developers provide mapping rules for mapping design-level constraints to the implementation of the simulator. Using the rules, an automated tool transforms the design-level specifications into simulator-specific runtime verification specifications and generates monitoring code which is injected into the implementation of the simulator. During simulation, these monitors observe the input and output variables of the control system and report changes to the verifier. The verifier checks whether these changes follow the constraints of the control system. We describe application of this approach to the verification of the constraints of an HVAC control system implemented with the power grid simulator GridLAB-D.

Ciraci, Selim; Fuller, Jason C.; Daily, Jeffrey A.; Makhmalbaf, Atefe; Callahan, Charles D.

2014-08-02T23:59:59.000Z

247

HVAC Market Study:  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun with Big Sky9, 2010 The meeting wasEngineering andHQHSI BestscientistsHVAC

248

A New Model to Simulate Energy Performance of VRF Systems  

SciTech Connect (OSTI)

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

249

Classroom HVAC: Improving ventilation and saving energy -- field study plan  

E-Print Network [OSTI]

in this study. Classroom HVAC: Improving Ventilation andV8doc.sas.com/sashtml. Classroom HVAC: Improving VentilationBerkeley, CA 94720. Classroom HVAC: Improving Ventilation

Apte, Michael G.; Faulkner, David; Hodgson, Alfred T.; Sullivan, Douglas P.

2004-01-01T23:59:59.000Z

250

HVAC component data modeling using industry foundation classes  

E-Print Network [OSTI]

HVAC Component Data Modeling Using Industry Foundationof a major extension of the HVAC part of the IFC data model.generic approach for handling HVAC components. This includes

Bazjanac, Vladimir; Forester, James; Haves, Philip; Sucic, Darko; Xu, Peng

2002-01-01T23:59:59.000Z

251

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.

252

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

SciTech Connect (OSTI)

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

Romberger, J.

2014-11-01T23:59:59.000Z

253

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

254

Monitoring-based HVAC Commissioning of an Existing Office Building for Energy Efficiciency  

E-Print Network [OSTI]

EnergyPlus, Trend Data Introduction The performance of HVACthe commissioning of HVAC systems. Analyzing trend data is aHVAC systems, such as improper operations of air-side economizers, simultaneous heating and cooling, and ineffective optimal start, were identified through trend

Wang, Liping

2014-01-01T23:59:59.000Z

255

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

256

Review of Pre- and Post-1980 Buildings in CBECS - HVAC Equipment  

SciTech Connect (OSTI)

PNNL was tasked by DOE to look at HVAC systems and equipment for Benchmark buildings based on 2003 CBECS data. This white paper summarizes the results of PNNL’s analysis of 2003 CBECS data and provides PNNL’s recommendations for HVAC systems and equipment for use in the Benchmark buildings.

Winiarski, David W.; Jiang, Wei; Halverson, Mark A.

2006-12-01T23:59:59.000Z

257

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

E-Print Network [OSTI]

Canada. Conference ACKNOWLEDGEMENTS This research was supported by the Assistant Secretary for Energy Efficiency and Renewable

Trcka, Marija

2010-01-01T23:59:59.000Z

258

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

E-Print Network [OSTI]

Canada. Conference ACKNOWLEDGEMENTS This research was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy,

Trcka, Marija

2010-01-01T23:59:59.000Z

259

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.

260

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

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

MODELING PARTICLE DEPOSITION ON HVAC HEAT JA Siegel1,3*  

E-Print Network [OSTI]

. Of Mechanical Engineering, University of California, Berkeley, CA, USA 2 Dept. Of Civil and Environmental degradation for heating, ventilating, and air conditioning (HVAC) systems. Particulate fouling of indoor fin: JASiegel@lbl.gov Proceedings: Indoor Air 2002 521 #12;HEAT EXCHANGER DESCRIPTION The HVAC heat exchangers

Siegel, Jeffrey

262

Pedernales Electric Cooperative- HVAC Rebate Program  

Broader source: Energy.gov [DOE]

Pedernales Electric Cooperative offers equipment rebates to members who install energy efficient HVAC equipment. Eligible equipment includes:...

263

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

264

Economic Comparison of HVAC and HVDCSolutions for Large Offshore Wind Farms underSpecial Consideration of Reliability.  

E-Print Network [OSTI]

?? An economic comparison of several HVAC-HVDC transmission systems from large offshore windfarms is presented. The power output from the offshore windfarm is modeled by… (more)

Lazaridis, Lazaros

2005-01-01T23:59:59.000Z

265

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

266

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

E-Print Network [OSTI]

function (TF) method was the method of choice for cooling load calculation. There- fore, information; Rundquist 1990; Treado and Bean 1992). Recently, ASHRAE developed two new cooling load calculation: Chantrasrisalai, C., and D.E. Fisher. 2007. Lighting heat gain parameters: Experimental results. HVAC&R Research

267

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

268

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

269

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

270

Simulating neural systems with Xyce.  

SciTech Connect (OSTI)

Sandia's parallel circuit simulator, Xyce, can address large scale neuron simulations in a new way extending the range within which one can perform high-fidelity, multi-compartment neuron simulations. This report documents the implementation of neuron devices in Xyce, their use in simulation and analysis of neuron systems.

Schiek, Richard Louis; Thornquist, Heidi K.; Mei, Ting; Warrender, Christina E.; Aimone, James Bradley; Teeter, Corinne; Duda, Alex M. [University of Illinois, Urbana-Champaign

2012-12-01T23:59:59.000Z

271

D-Zero HVAC Heat Pump Controls  

SciTech Connect (OSTI)

This engineering note documents the integration of Dzero Heat Pump 1 through Heat Pump 15 into the cryo/gas process control system commonly referred to as the cryo control system. Heat pumps 1 through 15 control the ambient air temperature on the 3rd, 5th, and 6th floor office areas at Dzero. The entire Johnson HVAC control system was replaced with a Siemens control system in 1999 leaving behind the 15 heat pumps with stand-alone Johnson controllers. Now, these 15 heat pump Johnson controllers are being replaced with small stand alone Beckhoff BC9000 controllers. The Beckhoff BC9000 controllers are network able into the existing Intellution control system. The Beckhoff BC9000 controllers use the cryo private Ethernet network and an OPC driver to get data into the Intellution SCADA node databases. The BC9000 is also programmed over this same Ethernet network.

Markley, Dan; /Fermilab

2004-04-14T23:59:59.000Z

272

Compression effects on pressure loss in flexible HVAC ducts  

E-Print Network [OSTI]

to Determine Flow Resistance of HVAC Air Ducts and Fittings.Pressure Loss in Flexible HVAC Ducts Bass Abushakra, Ph.D.to Determine Flow Resistance of HVAC Air Ducts and Fittings.

Abushakra, Bass; Walker, Iain S.; Sherman, Max H.

2002-01-01T23:59:59.000Z

273

Fouling of HVAC fin and tube heat exchangers  

E-Print Network [OSTI]

air ? air ? part ? part FPI HVAC REFERENCES Anonymous, 1987,LBNL-47668 Fouling of HVAC Fin and Tube Heat ExchangersCIEE SPONSOR. FOULING OF HVAC FIN AND TUBE HEAT EXCHANGERS

Siegel, Jeffrey; Carey, Van P.

2001-01-01T23:59:59.000Z

274

Field Evaluation of Desiccant-Integrated HVAC Systems: A Review of Case Studies in Multiple Commercial/Institutional Building Types  

E-Print Network [OSTI]

serves the guestroom corridors, was retrofitted with a 6000 scfm desiccant air handler that pre-treated outside air. The property's South Wing, which is nearly identical to the North Wing, was used as the comparison. While the WAC system in the South... over the course of the year than the North Wing. This equates to emptying two one-gallon buckets of water into each of the South Wing's 75 guestrooms each and every day of the Year. A second field-monitoring test was conducted from June 1992...

Yborra, S. C.

1998-01-01T23:59:59.000Z

275

Building America Expert Meeting: Transitioning Traditional HVAC...  

Energy Savers [EERE]

validate the general business models for traditional HVAC companies and whole house energy upgrade companies Review preliminary findings on the differences between the structure...

276

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

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

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

277

Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty...  

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

Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty Vehicle Applications Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty Vehicle Applications 2012 DOE...

278

Building America Webinar: HVAC Right-Sizing Part 1-Calculating...  

Energy Savers [EERE]

HVAC Right-Sizing Part 1-Calculating Loads Building America Webinar: HVAC Right-Sizing Part 1-Calculating Loads During this webinar, Building America Research Team IBACOS...

279

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...

280

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

E-Print Network [OSTI]

Elementalheatexchangermodelsareincreasinglyusedin heat pump design calculations because of their ability to accu. INTRODUCTION The heat exchanger model is an important aspect of the overall design and simulation of the air-to-air heat pump. There are many convergence criteria in the system design and simulation program

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

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

SciTech Connect (OSTI)

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

282

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

283

Simulation of open quantum systems  

E-Print Network [OSTI]

We present an approach for the semiclassical treatment of open quantum systems. An expansion into localized states allows restriction of a simulation to a fraction of the environment that is located within a predefined vicinity of the system. Adding and dropping environmental particles during the simulation yields an effective reduction of the size of the system that is being treated.

Florian Mintert; Eric J. Heller

2008-03-27T23:59:59.000Z

284

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

285

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

286

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

287

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

288

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

289

HVAC Modeling for Cost of Ownership Assessment in Biotechnology & Drugs Manufacturing  

E-Print Network [OSTI]

2000 Broomes, Peter. , “HVAC Modeling for Cost of Ownership2000 Broomes, Peter. , “HVAC Results Comparison”, April,HVAC Modeling for Cost of Ownership Assessment in

Broomes, Peter; Dornfeld, David A

2003-01-01T23:59:59.000Z

290

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 usingChemistry and Emissions on HVAC Filter Materials HugoChemistry and Emissions on HVAC Filter Materials Authors:

Destaillats, Hugo

2010-01-01T23:59:59.000Z

291

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

E-Print Network [OSTI]

from Ozone Reaction with HVAC Filters Hugo Destaillats,from Ozone Reaction with HVAC Filters Hugo Destaillatsfrom Ozone Reaction with HVAC Filters Hugo Destaillats

Destaillats, Hugo

2012-01-01T23:59:59.000Z

292

Experimental results of a predictive neural network HVAC controller  

SciTech Connect (OSTI)

Proportional, integral, and derivative (PID) control is widely used in many HVAC control processes and requires constant attention for optimal control. Artificial neural networks offer the potential for improved control of processes through predictive techniques. This paper introduces and shows experimental results of a predictive neural network (PNN) controller applied to an unstable hot water system in an air-handling unit. Actual laboratory testing of the PNN and PID controllers show favorable results for the PNN controller.

Jeannette, E.; Assawamartbunlue, K.; Kreider, J.F. [Univ. of Colorado, Boulder, CO (United States); Curtiss, P.S. [Architectural Energy Corp., Boulder, CO (United States)

1998-12-31T23:59:59.000Z

293

DOE Task 99-4 Extension of Design and Simulation Models 3/24/00 EXTENSION OF EXISTING DESIGN AND SIMULATION MODELS  

E-Print Network [OSTI]

pump systems, heat transfer, HVAC, hybrid systems, pavement heating, cooling ponds, surface water-source the first costs of closed-loop ground-source heat pump (GSHP) systems by reducing the necessary size and Spitler, 1999) and a simple water-to air heat pump model are the core components in the simulated systems

294

An Evaluation of the HVAC Load Potential for Providing Load Balancing Service  

SciTech Connect (OSTI)

This paper investigates the potential of providing aggregated intra-hour load balancing services using heating, ventilating, and air-conditioning (HVAC) systems. A direct-load control algorithm is presented. A temperature-priority-list method is used to dispatch the HVAC loads optimally to maintain consumer-desired indoor temperatures and load diversity. Realistic intra-hour load balancing signals were used to evaluate the operational characteristics of the HVAC load under different outdoor temperature profiles and different indoor temperature settings. The number of HVAC units needed is also investigated. Modeling results suggest that the number of HVACs needed to provide a {+-}1-MW load balancing service 24 hours a day varies significantly with baseline settings, high and low temperature settings, and the outdoor temperatures. The results demonstrate that the intra-hour load balancing service provided by HVAC loads meet the performance requirements and can become a major source of revenue for load-serving entities where the smart grid infrastructure enables direct load control over the HAVC loads.

Lu, Ning

2012-09-30T23:59:59.000Z

295

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

296

Recovery Act-Funded HVAC projects  

Broader source: Energy.gov [DOE]

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

297

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

298

Optimization Control Strategies for HVAC Terminal Boxes  

E-Print Network [OSTI]

is an important topic in today's building energy management and HVAC control field. The authors developed novel optimized control strategies and operation schedules for the terminal boxes for both occupied and non-occupied hours. The optimized control schedules...

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

299

SIMULATION OF A SOLAR ABSORPTION COOLING SYSTEM J.P. Praene*, D. Morau, F. Lucas, F. Garde, H. Boyer  

E-Print Network [OSTI]

of the extensive use of heating ventilation air conditioning (HVAC) systems, which increase the peak electric load cooling. As no CFC are used, absorption systems are friendlier to the environment. At present the market

Paris-Sud XI, Université de

300

Nuclear Systems Modeling & Simulation | More Science | ORNL  

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

Systems Modeling and Simulation SHARE Nuclear Systems Modeling and Simulation Reactor physics depletion model for the Advanced Test Reactor Reactor physics depletion model for the...

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

Nuclear Systems Modeling, Simulation & Validation | ORNL  

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

Systems Modeling and Simulation SHARE Nuclear Systems Modeling, Simulation and Validation Reactor physics depletion model for the Advanced Test Reactor Reactor physics depletion...

302

VARIABLE SPEED INTEGRATED INTELLIGENT HVAC BLOWER  

SciTech Connect (OSTI)

This comprehensive topical report discusses the key findings in the development of a intelligent integrated blower for HVAC applications. The benefits of rearward inclined blades over that of traditional forward inclined blades is well documented and a prototype blower design is presented. A comparison of the proposed blower to that of three typical units from the industry is presented. The design of the blower housing is also addressed and the impact of size limitations on static efficiency is discussed. Issues of air flow controllability in the rearward inclined blower is addressed and a solution to this problem is proposed. Several motor design options are discussed including inside-out radial flux designs and novel axial flux designs, all are focused on the various blower needs. The control of the motor-blower and airflow through the use of a high density inverter stage and modern digital signal processor is presented. The key technical challenges of the approach are discussed. The use of the motor as a sensor in the larger heating/ventilating system is also discussed. Diagnostic results for both the motor itself and the blower system are presented.

Shixiao Wang; Herman Wiegman; Wilson Wu; John Down; Luana Iorio; Asha Devarajan; Jing Wang; Ralph Carl; Charlie Stephens; Jeannine Jones; Paul Szczesny

2001-11-14T23:59:59.000Z

303

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

304

Proceedings: Indoor Air 2005 OZONE REMOVAL BY RESIDENTIAL HVAC FILTERS  

E-Print Network [OSTI]

Proceedings: Indoor Air 2005 2366 OZONE REMOVAL BY RESIDENTIAL HVAC FILTERS P Zhao1,2 , JA Siegel1, Austin, Texas 78758, USA ABSTRACT HVAC filters have a significant influence on indoor air quality% for Filter #2 at a face velocity of 0.81 cm/s. The potential for HVAC filters to affect ozone concentrations

Siegel, Jeffrey

305

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.

306

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.

307

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

308

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

309

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

310

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.

311

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

312

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

313

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]

Plus is a new whole-building energy simulation program being developed for the United States Department is modular in structure, and uses the heat balance technique to simulate building thermal loads. The Energy to calculate the airflows, which are used by EnergyPlus in the subsequent heat balance simulation. The paper

314

Energy Renovations: Volume 14: HVAC - A Guide for Contractors to Share with Homeowners  

SciTech Connect (OSTI)

This report was prepared by PNNL for DOE's Building America program and is intended as a guide that energy performance contractors can share with homeowners to describe various energy-efficient options for heating, cooling, and ventilating existing homes. The report provides descriptions of many common and not-so-common HVAC systems, including their advantages and disadvantages, efficiency ranges and characteristics of high-performance models, typical costs, and climate considerations. The report also provides decision trees and tables of useful information for homeowners who are making decisions about adding, replacing, or upgrading existing HVAC equipment in their homes. Information regarding home energy performance assessments (audits) and combustion safety issues when replacing HVAC equipment are also provided.

Gilbride, Theresa L.; Baechler, Michael C.; Hefty, Marye G.; Hand, James R.; Love, Pat M.

2011-08-29T23:59:59.000Z

315

Co-Simulation of Detailed Whole Building with the Power System to Study Smart Grid Applications  

SciTech Connect (OSTI)

Modernization of the power system in a way that ensures a sustainable energy system is arguably one of the most pressing concerns of our time. Buildings are important components in the power system. First, they are the main consumers of electricity and secondly, they do not have constant energy demand. Conventionally, electricity has been difficult to store and should be consumed as it is generated. Therefore, maintaining the demand and supply is critical in the power system. However, to reduce the complexity of power models, buildings (i.e., end-use loads) are traditionally modeled and represented as aggregated “dumb” nodes in the power system. This means we lack effective detailed whole building energy models that can support requirements and emerging technologies of the smart power grid. To gain greater insight into the relationship between building energy demand and power system performance, it is important to constitute a co-simulation framework to support detailed building energy modeling and simulation within the power system to study capabilities promised by the modern power grid. This paper discusses ongoing work at Pacific Northwest National Laboratory and presents underlying tools and framework needed to enable co-simulation of building, building energy systems and their control in the power system to study applications such as demand response, grid-based HVAC control, and deployment of buildings for ancillary services. The optimal goal is to develop an integrated modeling and simulation platform that is flexible, reusable, and scalable. Results of this work will contribute to future building and power system studies, especially those related to the integrated ‘smart grid’. Results are also expected to advance power resiliency and local (micro) scale grid studies where several building and renewable energy systems transact energy directly. This paper also reviews some applications that can be supported and studied using the framework introduced to understand their implications before they can be successfully implemented in the power system.

Makhmalbaf, Atefe; Fuller, Jason C.; Srivastava, Viraj; Ciraci, Selim; Daily, Jeffrey A.

2014-12-24T23:59:59.000Z

316

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)

317

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

318

Modeling Building Energy Use and HVAC Efficiency Improvements in Extreme Hot and Humid Regions  

E-Print Network [OSTI]

An energy analysis was performed on the Texas A & M University at Qatar building in Doha, Qatar. The building and its HVAC systems were modeled using EnergyPlus. Building chilled water and electrical data were collected to validate the computer...

Bible, Mitchell

2011-10-21T23:59:59.000Z

319

VOL. 6, NO. 1 HVAC&R RESEARCH JANUARY 2000 Qualitative Comparison of North American and  

E-Print Network [OSTI]

Calculation of design cooling and heating loads is an essential task in the design of HVAC systems and has societies publish methods for calculating design cooling and heating load calculations in their handbooks.K. Cooling Load Calculation Methods Simon J. Rees, Ph.D Jeffrey D. Spitler, Ph.D., P.E. Member ASHRAE Member

320

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 Group, Davis, CA, USA 4 Southern California Edison, Irwindale, CA, USA ABSTRACT HVAC maintenance utilities across the nation to include HVAC maintenance measures in energy efficiency programs

California at Davis, University 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.


321

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]

. INTRODUCTION Ground-source heat pump systems have become increas- ingly popular for both residential-Loop Ground-Source Heat Pump Systems. ASHRAE Transactions. 106(1): 380-393. Reprinted by permission from with conventional systems. In closed-loop ground- source heat pump systems, heat rejection/extraction is accom

322

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

323

Daylighting controls; Orphan of HVAC design  

SciTech Connect (OSTI)

This paper reports that in the array of strategies employed for energy-efficient design and retrofitting in commercial buildings, the use of daylighting controls is often overlooked or omitted. Thus, daylighting controls are a worthy but neglected orphan of the design process, stranded between the lighting designer, architect and engineer. Most daylighting analysis ignores HVAC effects, despite obvious interactions between windows, heat-from-lights, and thermal loads.

Rundquist, R.A. (R.A. Rundquist Associates Inc., Northampton, MA (US))

1991-11-01T23:59:59.000Z

324

2014-04-28 Issuance: Certification of Commercial HVAC, Water...  

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

Register final rule regarding the certification of commercial heating, ventilation, and air-conditioning (HVAC), water heating (WH), and refrigeration (CRE) equipment, as issued...

325

Columbia Water and Light- HVAC and Lighting Efficiency Rebates  

Broader source: Energy.gov [DOE]

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...

326

Two Alabama Elementary Schools Get Cool with New HVAC Units ...  

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

campaign. Winston's HVAC replacement project received a boost from the Alabama State Energy Program, which granted the school district a little more than 82,000 in Recovery...

327

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]

is presented. INTRODUCTION Although originating in the residential building sector, ground-source heat pump conductivity is a signif- icant challenge facing designers of ground-source heat pump (GSHP heat pump systems" may include a range of system configurations, closed-loop systems, where the ground

328

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

329

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]

source heat pump systems, and design of hybrid ground source systems. This paper describes-485). © 1999 American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. #12;A Short Time-coupled heat pump systems is important for design of ground loop heat exchangers, energy analysis of ground

Ghajar, Afshin J.

330

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

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

System Simulations of Hybrid Electric Vehicles with Focus on Emissions System Simulations of Hybrid Electric Vehicles with Focus on Emissions Comparative simulations of hybrid...

331

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 reductions in electrical energy usage, and allow more effective demand-side management. However, comparedThis paper has been downloaded from the Building and Environmental Thermal Systems Research Group

Ghajar, Afshin J.

332

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

333

Monte Carlo simulation in systems biology  

E-Print Network [OSTI]

2 The history of Monte Carlo Sampling in Systems Biology 1.1simulation tools: the systems biology workbench and biospiceCellular and Molecular Biology. ASM Press, Washington

Schellenberger, Jan

2010-01-01T23:59:59.000Z

334

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

E-Print Network [OSTI]

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group that is typically only the case for envelope-dominated buildings in a given location. · Reasonably constant ground thermal properties between locations for which the rule-of-thumb would be applied. The main example

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]

International Heat Pumps in Cold Climates Conference, Aylmer, Québec. August 17-18, 2000. #12;GLHEPRO ­ A DESIGN University Stillwater, OK, U.S.A. KEY WORDS Ground source heat pump systems, ground loop heat exchangers size in order to meet user-specified minimum or maximum heat pump entering fluid temperatures

336

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

E-Print Network [OSTI]

-source heat pump (GSHP) systems have been gaining increasing popularity in commercial and residential in construction to a domestic water well). Water is circulated from the well through the heat pump in an open, water is recirculated between the well and the building (heat pump). Deep bores are drilled in hard rock

337

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]

include improved performance of heat pumps with water as the working fluid (instead of air) and lower.D. Smith, J.D. Spitler. 2002. Advances in Ground Source Heat Pump Systems - An International Overview. Proceedings of the Seventh International Energy Agency Heat Pump Conference. 1:313-324. Beijing. May 19

338

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]

environmental systems. The accuracy ofthe thermal load calculation procedure is, therefore, ofconcern to heating oftwo newproceduresfor design cooling load calculations: the heat balance method (HBM) andradiant time (Spitler et al. 1997) is a simplified, heat balance-based design cooling load method intended

339

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

340

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

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

VARIABLE SPEED INTEGRATED INTELLIGENT HVAC BLOWER  

SciTech Connect (OSTI)

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

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

2003-09-23T23:59:59.000Z

342

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

343

Advanced HVAC Systems | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustionImprovement3-- ------------------------------Chapter 39.208-006EnergyFossil EnergyDepartment

344

Case Studies of Commissioning HVAC Systems  

E-Print Network [OSTI]

This paper discusses problems found during third party commissioning of projects where humidity control was an indicator of significant problems. Project 1 was an 8000 square foot library. Problems found included air conditioning (A/C) and heating...

Browning, B. K.

2001-01-01T23:59:59.000Z

345

Wireless Demand Response Controls for HVAC Systems  

E-Print Network [OSTI]

temperature-based demand response in buildings that havedemand response advantages of global zone temperature setup in buildings

Federspiel, Clifford

2010-01-01T23:59:59.000Z

346

Self-Correcting HVAC Controls Project Final Report  

SciTech Connect (OSTI)

This document represents the final project report for the Self-Correcting Heating, Ventilating and Air-Conditioning (HVAC) Controls Project jointly funded by Bonneville Power Administration (BPA) and the U.S. Department of Energy (DOE) Building Technologies Program (BTP). The project, initiated in October 2008, focused on exploratory initial development of self-correcting controls for selected HVAC components in air handlers. This report, along with the companion report documenting the algorithms developed, Self-Correcting HVAC Controls: Algorithms for Sensors and Dampers in Air-Handling Units (Fernandez et al. 2009), document the work performed and results of this project.

Fernandez, Nicholas; Brambley, Michael R.; Katipamula, Srinivas; Cho, Heejin; Goddard, James K.; Dinh, Liem H.

2010-01-04T23:59:59.000Z

347

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

348

Strategy Guideline: Transitioning HVAC Companies to Whole House Performance Contractors  

SciTech Connect (OSTI)

This report describes the findings from research IBACOS conducted related to heating, ventilation, and air conditioning (HVAC) companies who have made the decision to transition to whole house performance contracting (WHPC).

Burdick, A.

2012-05-01T23:59:59.000Z

349

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

350

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

Broader source: Energy.gov [DOE]

Prescriptive rebates are available for many HVAC and motor efficiency improvements. Pre-approval is required for all rebates. The programs are available only to non-residential customers that...

351

Communication Simulations for Power System Applications  

SciTech Connect (OSTI)

New smart grid technologies and concepts, such as dynamic pricing, demand response, dynamic state estimation, and wide area monitoring, protection, and control, are expected to require considerable communication resources. As the cost of retrofit can be high, future power grids will require the integration of high-speed, secure connections with legacy communication systems, while still providing adequate system control and security. While considerable work has been performed to create co-simulators for the power domain with load models and market operations, limited work has been performed in integrating communications directly into a power domain solver. The simulation of communication and power systems will become more important as the two systems become more inter-related. This paper will discuss ongoing work at Pacific Northwest National Laboratory to create a flexible, high-speed power and communication system co-simulator for smart grid applications. The framework for the software will be described, including architecture considerations for modular, high performance computing and large-scale scalability (serialization, load balancing, partitioning, cross-platform support, etc.). The current simulator supports the ns-3 (telecommunications) and GridLAB-D (distribution systems) simulators. Ongoing and future work will be described, including planned future expansions for a traditional transmission solver. A test case using the co-simulator, utilizing a transactive demand response system created for the Olympic Peninsula and AEP gridSMART demonstrations, requiring two-way communication between distributed and centralized market devices, will be used to demonstrate the value and intended purpose of the co-simulation environment.

Fuller, Jason C.; Ciraci, Selim; Daily, Jeffrey A.; Fisher, Andrew R.; Hauer, Matthew L.

2013-05-29T23:59:59.000Z

352

Simulation framework for intelligent transportation systems  

SciTech Connect (OSTI)

A simulation framework has been developed for a large-scale, comprehensive, scaleable simulation of an Intelligent Transportation System (ITS). The simulator is designed for running on parallel computers and distributed (networked) computer systems, but can run on standalone workstations for smaller simulations. The simulator currently models instrumented smart vehicles with in-vehicle navigation units capable of optimal route planning and Traffic Management Centers (TMC). The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide two-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces to support human-factors studies. Realistic modeling of variations of the posted driving speed are based on human factors studies that take into consideration weather, road conditions, driver personality and behavior, and vehicle type. The prototype has been developed on a distributed system of networked UNIX computers but is designed to run on parallel computers, such as ANL`s IBM SP-2, for large-scale problems. A novel feature of the approach is that vehicles are represented by autonomous computer processes which exchange messages with other processes. The vehicles have a behavior model which governs route selection and driving behavior, and can react to external traffic events much like real vehicles. With this approach, the simulation is scaleable to take advantage of emerging massively parallel processor (MPP) systems.

Ewing, T.; Doss, E.; Hanebutte, U.; Tentner, A.

1996-10-01T23:59:59.000Z

353

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...

354

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

355

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

E-Print Network [OSTI]

of contractors in the HVAC market will certainly have anational version of the HVAC market share decision model,equipment 4.5. HVAC Equipment Market Shares We now define

Johnson, F.X.

2010-01-01T23:59:59.000Z

356

Influence Of Three Dynamic Predictive Clothing Insulation Models On Building Energy Use, HVAC Sizing And Thermal Comfort  

E-Print Network [OSTI]

ON BUILDING ENERGY USE, HVAC SIZING AND THERMAL COMFORT aThe results showed that when the HVAC is controlled based onequipment sizing. When the HVAC is controlled based on the

Schiavon, Stefano; Lee, Kwang Ho

2013-01-01T23:59:59.000Z

357

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

358

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

359

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

360

Argonne simulation framework for intelligent transportation systems  

SciTech Connect (OSTI)

A simulation framework has been developed which defines a high-level architecture for a large-scale, comprehensive, scalable simulation of an Intelligent Transportation System (ITS). The simulator is designed to run on parallel computers and distributed (networked) computer systems; however, a version for a stand alone workstation is also available. The ITS simulator includes an Expert Driver Model (EDM) of instrumented ``smart`` vehicles with in-vehicle navigation units. The EDM is capable of performing optimal route planning and communicating with Traffic Management Centers (TMC). A dynamic road map data base is sued for optimum route planning, where the data is updated periodically to reflect any changes in road or weather conditions. The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide 2-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces that includes human-factors studies to support safety and operational research. Realistic modeling of variations of the posted driving speed are based on human factor studies that take into consideration weather, road conditions, driver`s personality and behavior and vehicle type. The simulator has been developed on a distributed system of networked UNIX computers, but is designed to run on ANL`s IBM SP-X parallel computer system for large scale problems. A novel feature of the developed simulator is that vehicles will be represented by autonomous computer processes, each with a behavior model which performs independent route selection and reacts to external traffic events much like real vehicles. Vehicle processes interact with each other and with ITS components by exchanging messages. With this approach, one will be able to take advantage of emerging massively parallel processor (MPP) systems.

Ewing, T.; Doss, E.; Hanebutte, U.; Canfield, T.; Brown-VanHoozer, A.; Tentner, A.

1996-04-01T23:59:59.000Z

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.


361

Expert systems for design and simulation  

SciTech Connect (OSTI)

We discuss work in progress on two expert systems. We are developing systems that use artificial intelligence techniques to simplify the use of large simulation codes and to help design complicated physical devices. The simulation codes are used in analyzing and designing weapons, and the devices are themselves part of weapon systems. But we focus not only on the particular applications, but also on the broader issues common to design problems: large solution spaces and tentative reasoning. We also discuss some practical difficulties encountered during the project. One expert system provides an interface between users and several simulation codes. It checks input for errors, builds input files for the codes, and submits jobs to a central computing facility. The other expert system helps turn a description of a device into a particular design. Currently this expert system includes three major parts: a translator of descriptions into designs, a graphics interface that presents the design to the user and allows him to manipulate it, and a refiner of designs. The latter is the ''smartest'' part of the system, and the target of much of our present efforts.

Aldridge, J.; Cerutti, J.; Draisin, W.; Steuerwalt, M.

1985-01-01T23:59:59.000Z

362

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...

363

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...

364

CoolCab Test and Evaluation and CoolCalc HVAC Tool Development...  

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

Evaluation and CoolCalc HVAC Tool Development CoolCab Test and Evaluation and CoolCalc HVAC Tool Development 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies...

365

Simulating Complex Window Systems using BSDF Data  

SciTech Connect (OSTI)

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.

Konstantoglou, Maria; Jonsson, Jacob; Lee, Eleanor

2009-06-22T23:59:59.000Z

366

Evaluation of flow capture techniques for measuring HVAC grilleairflows  

SciTech Connect (OSTI)

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

367

Deposition of biological aerosols on HVAC heat exchangers  

SciTech Connect (OSTI)

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

Siegel, Jeffrey; Walker, Ian

2001-09-01T23:59:59.000Z

368

Simulating the Daylight Performance of Complex Fenestration Systems Using  

E-Print Network [OSTI]

LBNL-4414E Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional, January 21, 2011. 1 Simulating the Daylight Performance of Complex Fenestration Systems Using (BSDFs) to model the daylighting performance of complex fenestration systems (CFS), enabling greater

369

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.

370

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

371

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

372

Advanced simulation of intelligent transportation systems  

SciTech Connect (OSTI)

A large-scale, comprehensive, scaleable simulation of an Intelligent Transportation System (ITS) has been developed which is capable of running on parallel computers and distributed (networked) computer systems. The simulator currently models instrumented {open_quotes}smart{close_quotes} vehicles with in-vehicle navigation units capable of optimal route planning and Traffic Management Centers (TMC). The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide two-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces to support human-factors studies. The prototype has been developed on a distributed system of networked UNIX computers but is designed to run on parallel computers, such as ANL`s IBM SP-2, for large-scale problems. A novel feature of this approach is that vehicles are represented by autonomous computer processes which exchange messages with other processes. The vehicles have a behavior model which governs route selection and driving behavior, and can react to external traffic events much like real vehicles. With this approach, the simulation is scaleable to take advantage of emerging massively parallel processor (MPP) systems.

Ewing, T.; Doss, E.; Hanebutte, U.; Tentner, A. [Argonne National Lab., IL (United States)

1996-11-01T23:59:59.000Z

373

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

374

Comparison of Two Statistical Approaches to Detect Abnormal Building Energy Consumption with Simulation Test  

E-Print Network [OSTI]

?or? Emea?Esim Eller?Building ? HVAC?system:?DDVAV ? Baseline?period:?March?August,1997 Simulation?Data?Sets 8 0...?ID Eller 1 Outside?airflow?ratio??increase?of??3.1% 2 Outside?airflow?ratio??decrease?of??3.1% 3 Cold?deck?leaving?temperature??increase?of?4?F 4 Cold?deck?leaving?temperature??decrease?of?4.5?F 5 Hot?deck?leaving?temperature??increase?of?10?F 6 Hot...

Lin, G.; Claridge, D.

2012-01-01T23:59:59.000Z

375

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

376

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

377

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

SciTech Connect (OSTI)

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

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

2001-10-11T23:59:59.000Z

378

HVAC Right-Sizing Part 1: Calculating Loads | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdfGeorge Waldmann GeorgeLogging Systems2008Gulf Coast'sFormHOWHQHVAC DesignHVAC

379

A framework for on-line simulation systems  

E-Print Network [OSTI]

Simulation has traditionally been used for off-line planning and design. The advent of computer integrated manufacturing and flexible manufacturing systems has increased interest in shop floor control systems that use simulation technology for real-time...

Drake, Glenn Richardson

1996-01-01T23:59:59.000Z

380

Large-scale Intelligent Transporation Systems simulation  

SciTech Connect (OSTI)

A prototype computer system has been developed which defines a high-level architecture for a large-scale, comprehensive, scalable simulation of an Intelligent Transportation System (ITS) capable of running on massively parallel computers and distributed (networked) computer systems. The prototype includes the modelling of instrumented ``smart`` vehicles with in-vehicle navigation units capable of optimal route planning and Traffic Management Centers (TMC). The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide 2-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces to support human-factors studies. The prototype has been developed on a distributed system of networked UNIX computers but is designed to run on ANL`s IBM SP-X parallel computer system for large scale problems. A novel feature of our design is that vehicles will be represented by autonomus computer processes, each with a behavior model which performs independent route selection and reacts to external traffic events much like real vehicles. With this approach, one will be able to take advantage of emerging massively parallel processor (MPP) systems.

Ewing, T.; Canfield, T.; Hannebutte, U.; Levine, D.; Tentner, A.

1995-06-01T23:59:59.000Z

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

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

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

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

382

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

SciTech Connect (OSTI)

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

Not Available

2014-03-01T23:59:59.000Z

383

MODELING AND SIMULATION OF HVAC FAULTS IN ENERGYPLUS  

E-Print Network [OSTI]

Steam pressure sensor out of calibration Chiller Fouled condensersteam pressure if the sensor has positive offset. Decreased chiller efficiency and increased condenser

Basarkar, Mangesh

2013-01-01T23:59:59.000Z

384

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

385

MODELING AND SIMULATION OF HVAC FAULTS IN ENERGYPLUS  

E-Print Network [OSTI]

Mangesh Basarkar, Xiufeng Pang, Liping Wang, Philip Haves,Mangesh Basarkar, Xiufeng Pang, Liping Wang, Philip Haves,

Basarkar, Mangesh

2013-01-01T23:59:59.000Z

386

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

SciTech Connect (OSTI)

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

387

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

388

Research & Development Roadmap: Emerging HVAC Technologies | Department of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: AlternativeEnvironment,Institutes and LaunchesRelatedEnergy RequestEnergy HVAC

389

LDV HVAC Model Development and Validation | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe10 DOEWashington, DCKickoffLDV HVAC Model Development and

390

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

391

THE DOE-2 COMPUTER PROGRAM FOR THERMAL SIMULATION OF BUILDINGS  

E-Print Network [OSTI]

of the energy addition and extraction actually to be supplied at the heating and cooling coils by the HVAC of the hour-by-hour heat loss and gain to the building spaces and the heating and cooling loads imposed upon of the HVAC system, the time-varying temperature set-points, and the heating, cooling and fan schedules

392

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

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

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

393

A View on Future Building System Modeling and Simulation  

SciTech Connect (OSTI)

This chapter presents what a future environment for building system modeling and simulation may look like. As buildings continue to require increased performance and better comfort, their energy and control systems are becoming more integrated and complex. We therefore focus in this chapter on the modeling, simulation and analysis of building energy and control systems. Such systems can be classified as heterogeneous systems because they involve multiple domains, such as thermodynamics, fluid dynamics, heat and mass transfer, electrical systems, control systems and communication systems. Also, they typically involve multiple temporal and spatial scales, and their evolution can be described by coupled differential equations, discrete equations and events. Modeling and simulating such systems requires a higher level of abstraction and modularisation to manage the increased complexity compared to what is used in today's building simulation programs. Therefore, the trend towards more integrated building systems is likely to be a driving force for changing the status quo of today's building simulation programs. Thischapter discusses evolving modeling requirements and outlines a path toward a future environment for modeling and simulation of heterogeneous building systems.A range of topics that would require many additional pages of discussion has been omitted. Examples include computational fluid dynamics for air and particle flow in and around buildings, people movement, daylight simulation, uncertainty propagation and optimisation methods for building design and controls. For different discussions and perspectives on the future of building modeling and simulation, we refer to Sahlin (2000), Augenbroe (2001) and Malkawi and Augenbroe (2004).

Wetter, Michael

2011-04-01T23:59:59.000Z

394

Educational systems need appropriate animations and simulations Ruddy LELOUCHE  

E-Print Network [OSTI]

-mail: LELOUCHE@IFT.ULAVAL.CA Abstract Animations and simulations are often presented as tools for learning in a simulation-based system to help practising and learning algorithmics. Finally, the paper proposes a guideline, learning activity, knowledge type. Résumé Les animations et les simulations sont souvent présentées comme

Paris-Sud XI, Université de

395

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

396

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

397

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

398

Simulation methods for the development of modular strategic guidance systems  

E-Print Network [OSTI]

The traditional approach to simulation-based system design results in a stovepiped development process where subsystems are developed independently and integration requirements are then levied on the system architecture. ...

Long, Stephen Michael, Ensign

2003-01-01T23:59:59.000Z

399

System-Level Monitoring and Diagnosis of Building HVAC System  

E-Print Network [OSTI]

Y. Shu, Building envelope regulations on thermal comfort inof the building envelope on indoor thermal behavior, serveof the building envelope on indoor thermal behavior. This is

Wu, Siyu

2013-01-01T23:59:59.000Z

400

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

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

System-Level Monitoring and Diagnosis of Building HVAC System  

E-Print Network [OSTI]

setpoint may demand less cooling supply air. A fouled airsetpoint may demand less cooling supply air. A fouled airrequires more cooling or heating supply air from its upper-

Wu, Siyu

2013-01-01T23:59:59.000Z

402

The Simulation of Synchronous Reactive Systems In Ptolemy II  

E-Print Network [OSTI]

The Simulation of Synchronous Reactive Systems In Ptolemy II by Paul Whitaker Submitted to the Department of Electrical Engineering and Computer Sciences, University of California at Berkeley, in partial;_____________________________________________________________________ Simulation of Synchronous Reactive Systems in Ptolemy II ii Abstract The Synchronous Reactive (SR) domain

403

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

404

Dynamic wind turbine models in power system simulation tool  

E-Print Network [OSTI]

Dynamic wind turbine models in power system simulation tool DIgSILENT Anca D. Hansen, Florin Iov Iov, Poul Sørensen, Nicolaos Cutululis, Clemens Jauch, Frede Blaabjerg Title: Dynamic wind turbine system simulation tool PowerFactory DIgSILENT for different wind turbine concepts. It is the second

405

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

406

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

407

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.

408

Simulation Models for Improved Water Heating Systems  

E-Print Network [OSTI]

and Simulation of a Smart Water Heater. ” In Workshop inFreezers, Furnaces, Water Heaters, Room and Central AirNovember. ADL. 1982b. Water Heater Computer Model User’s

Lutz, Jim

2014-01-01T23:59:59.000Z

409

Kentucky Power- Residential Efficient HVAC Rebate Program  

Broader source: Energy.gov [DOE]

Kentucky Power's High Efficiency Heat Pump Program offers a $400 rebate to residential customers living in existing (site-built) homes who upgrade electric resistance heating systems with a new,...

410

Modeling particle deposition on HVAC heat exchangers  

SciTech Connect (OSTI)

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

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

2002-01-01T23:59:59.000Z

411

Driven harmonic oscillator as a quantum simulator for open systems  

E-Print Network [OSTI]

We show theoretically how a driven harmonic oscillator can be used as a quantum simulator for non-Markovian damped harmonic oscillator. In the general framework, the results demonstrate the possibility to use a closed system as a simulator for open quantum systems. The quantum simulator is based on sets of controlled drives of the closed harmonic oscillator with appropriately tailored electric field pulses. The non-Markovian dynamics of the damped harmonic oscillator is obtained by using the information about the spectral density of the open system when averaging over the drives of the closed oscillator. We consider single trapped ions as a specific physical implementation of the simulator, and we show how the simulator approach reveals new physical insight into the open system dynamics, e.g. the characteristic quantum mechanical non-Markovian oscillatory behavior of the energy of the damped oscillator, usually obtained by the non-Lindblad-type master equation, can have a simple semiclassical interpretation.

Jyrki Piilo; Sabrina Maniscalco

2006-10-03T23:59:59.000Z

412

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

Broader source: Energy.gov [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.

413

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

Broader source: Energy.gov [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.

414

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

415

Reactor Subsystem Simulation for Nuclear Hybrid Energy Systems  

SciTech Connect (OSTI)

Preliminary system models have been developed by Idaho National Laboratory researchers and are currently being enhanced to assess integrated system performance given multiple sources (e.g., nuclear + wind) and multiple applications (i.e., electricity + process heat). Initial efforts to integrate a Fortran-based simulation of a small modular reactor (SMR) with the balance of plant model have been completed in FY12. This initial effort takes advantage of an existing SMR model developed at North Carolina State University to provide initial integrated system simulation for a relatively low cost. The SMR subsystem simulation details are discussed in this report.

Shannon Bragg-Sitton; J. Michael Doster; Alan Rominger

2012-09-01T23:59:59.000Z

416

PowerSystemsSimulation NSERC Industrial Research Chair in  

E-Print Network [OSTI]

an offshore wind power plant to an onshore grid. To develop a PSCAD/EMTDC simulation model of an offshore WPPPowerSystemsSimulation NSERC Industrial Research Chair in Legends: 1. Without negative sequence, Aalborg Univ. and Univ. of Manitoba, email:skc@et.aau.dk A 400MW offshore wind power plant has been

Chaudhary, Sanjay

417

Fouling of HVAC fin and tube heat exchangers  

SciTech Connect (OSTI)

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

Siegel, Jeffrey; Carey, Van P.

2001-07-01T23:59:59.000Z

418

Recent Developments of the Modelica"Buildings" Library for Building Energy and Control Systems  

SciTech Connect (OSTI)

At the Modelica 2009 conference, we introduced the Buildings library, a freely available Modelica library for building energy and control systems. This paper reports the updates of the library and presents example applications for a range of heating, ventilation and air conditioning (HVAC) systems. Over the past two years, the library has been further developed. The number of HVAC components models has been doubled and various components have been revised to increase numerical robustness.The paper starts with an overview of the library architecture and a description of the main packages. To demonstrate the features of the Buildings library, applications that include multizone airflow simulation as well as supervisory and local loop control of a variable air volume (VAV) system are briefly described. The paper closes with a discussion of the current development.

Wetter, Michael; Zuo, Wangda; Nouidui, Thierry Stephane

2011-04-01T23:59:59.000Z

419

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

420

A linear time-varying simulation of the respiratory system  

E-Print Network [OSTI]

A LINEAR TIME-VARYING SIMULATION OF THE RESPIRATORY SYSTEM A Thesis by OSCAR RENATO HERNANDEZ Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... August 1993 Major Subject: Health Physics A LINEAR TIME-VARYING SIMULATION OF THE RESPIRATORY SYSTEM A Thesis by OSCAR RENATO HERNANDEZ Approved as to style and content by: Wes y E. Bolch (Chair of Committee) Dan Hig tower (Member) ohn...

Hernandez, Oscar Renato

1993-01-01T23:59:59.000Z

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.


421

Systems simulation of oil additives to grain at terminal elevators  

E-Print Network [OSTI]

SYSTEMS SIMULATION OF OIL ADDITIVES TO GRAIN AT TERMINAL ELEVATORS A Thesis by Kerry James Goforth Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... 1985 Major Subject: Agricultural Engineering SYSTEMS SIMULATION OF OIL ADDITIVES TO GRAIN AT TERMINAL ELEVATORS A Thesis by KERRY J. GOFORTH Approved as to style and content by: Calvin B. Parne 1, Jr. (Chairman of Committee) tto R. Kunze...

Goforth, Kerry James

1985-01-01T23:59:59.000Z

422

Joint HVAC transmission EMF environmental study  

SciTech Connect (OSTI)

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

423

Diagnosis of Effectiveness of HVAC System and Energy Performance of Osaka-Gas Building through Retro-Commissioning Part 2 Handling the Data Produced by BEMS and Some Results of Analyses  

E-Print Network [OSTI]

. Operation patterns of heat source plants vary from 2003 to 2012 according to change in plant’s operational strategy. 90 percent of primary energy was consumed by generators and chillers. Since the plant is run by combined heat and power system, waste... heat from the generators is recovered and used for chillers. The efficiency of the generators had been kept around 0.35 which was almost same as specification of the machines. The efficiency of the entire system, however, was decreased, especially...

Yamaha, M.; Ando,T.

2014-01-01T23:59:59.000Z

424

Building America Expert Meeting Report: Transitioning Traditional HVAC Contractors to Whole House Performance Contractors  

SciTech Connect (OSTI)

This report outlines findings resulting from a U.S. Department of Energy Building America expert meeting to determine how HVAC companies can transition from a traditional contractor status to a service provider for whole house energy upgrade contracting. IBACOS has embarked upon a research effort under the Building America Program to understand business impacts and change management strategies for HVAC companies. HVAC companies can implement these strategies in order to quickly transition from a 'traditional' heating and cooling contractor to a service provider for whole house energy upgrade contracting. Due to HVAC service contracts, which allow repeat interaction with homeowners, HVAC companies are ideally positioned in the marketplace to resolve homeowner comfort issues through whole house energy upgrades. There are essentially two primary ways to define the routes of transition for an HVAC contractor taking on whole house performance contracting: (1) Sub-contracting out the shell repair/upgrade work; and (2) Integrating the shell repair/upgrade work into their existing business. IBACOS held an Expert Meeting on the topic of Transitioning Traditional HVAC Contractors to Whole House Performance Contractors on March 29, 2011 in San Francisco, CA. The major objectives of the meeting were to: Review and validate the general business models for traditional HVAC companies and whole house energy upgrade companies Review preliminary findings on the differences between the structure of traditional HVAC Companies and whole house energy upgrade companies Seek industry input on how to structure information so it is relevant and useful for traditional HVAC contractors who are transitioning to becoming whole house energy upgrade contractors Seven industry experts identified by IBACOS participated in the session along with one representative from the National Renewable Energy Laboratory (NREL). The objective of the meeting was to validate the general operational profile of an integrated whole house performance contracting company and identify the most significant challenges facing a traditional HVAC contractor looking to transition to a whole house performance contractor. To facilitate the discussion, IBACOS divided the business operations profile of a typical integrated whole house performance contracting company (one that performs both HVAC and shell repair/upgrade work) into seven Operational Areas with more detailed Business Functions and Work Activities falling under each high-level Operational Area. The expert panel was asked to review the operational profile or 'map' of the Business Functions. The specific Work Activities within the Business Functions identified as potential transition barriers were rated by the group relative to the value in IBACOS creating guidance ensuring a successful transition and the relative difficulty in executing.

Burdick, A.

2011-10-01T23:59:59.000Z

425

Dynamic simulation of a proposed ITER tritium processing system  

SciTech Connect (OSTI)

Dynamically simulating the fuel cycle in a fusion reactor is crucial to developing a better understanding of the safe and reliable operation of this complex system. In this work, we propose a tritium processing system for ITER`s plasma exhaust. The dynamic simulation of this proposed system is then performed with the TRUFFLES (TRitiUm Fusion Fuel cycLE dynamic Simulation) model. The fuel management, storage, and fueling operations are developed and coupled with previous cryopump and fuel cleanup unit subsystems to fully realize the complete torus exhaust flow cycle. Results show that tritium inventories will vary widely depending upon reactor operation, individual subsystem and unit operation designs. A diverse collection of batch-controlled subsystems with changes in their processing parameters are simulated in this work. In particular, the effects from the fuel management subsystem`s fuel reserve and tank switching times are quantified using sensitivity studies. 6 refs., 10 figs., 2 tabs.

Kuan, W.; Abdou, M.A. [Univ. of California, Los Angeles, CA (United States); Scott W.R. [Los Alamos National Lab., NM (United States)

1995-10-01T23:59:59.000Z

426

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...

427

Simulating sensorimotor systems with cortical topology  

E-Print Network [OSTI]

Design. . . . Figure 9. The Brain Function . . Figure 10. Chaotic Behavior of a Simple Recurrent Equation of One Variable . . Page . . . . 13 . . . . 15 . . . . 1 6 24 . . . 25 Figure 11. Difference between Cartesian Image Space and Joint... intelli- gence and/or neural networks on the technological side and involve anatomical, physiological, and psychological systems on the biological side. We will characterize recent robotic sensorimotor system designs by comparing them from...

Saxon, James Bennett

1991-01-01T23:59:59.000Z

428

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

429

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

SciTech Connect (OSTI)

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

430

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

SciTech Connect (OSTI)

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

431

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

432

Aircraft AC Generators: Hybrid System Modeling and Simulation  

E-Print Network [OSTI]

--Integrated Drive Generators (IDGs) are the main source of electrical power for a number of critical systems1 Aircraft AC Generators: Hybrid System Modeling and Simulation Ashraf Tantawy, Student Member is a difficult task. dq0 models have been developed for design and control of generators, but these models

Koutsoukos, Xenofon D.

433

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

434

OPTIMIZED CONTROL STRATEGIES FOR A TYPICAL WATER LOOP HEAT PUMP SYSTEM.  

E-Print Network [OSTI]

??Water Loop Heat Pump (WLHP) System has been widely utilized in the Heating, Ventilating and Air Conditioning (HVAC) industry for several decades. There is no… (more)

Lian, Xu

2011-01-01T23:59:59.000Z

435

Structure Design and Indirect Adaptive General Predictive Temperature Control of a Class of Passive HVAC  

E-Print Network [OSTI]

HVAC TAWEGOUM Rousseau Unité Propre EPHor (Environnement Physique de la plante Horticole) Institut, moisture) is a dominating factor, on the one hand to deal with the market quantitative and qualitative

Paris-Sud XI, Université de

436

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

Broader source: Energy.gov [DOE]

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

437

UNIT NUMBER: C-304 Buildina/HVAC Picina Svstem- Soil Backfill  

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

63 UNIT NUMBER: C-304 BuildinaHVAC Picina Svstem- Soil Backfill UNIT NAME: REGULATORY STATUS: AOC .OCATION: Adjacent to C-304 building APPROXIMATE DIMENSIONS: 100 feet wide by 200...

438

Comparison of two techniques for the simulation of PV systems  

SciTech Connect (OSTI)

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

439

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 problem; energy that is needlessly consumed within the buildings themselves. In most buildings, HVAC to 60% of all energy consumption in large build- ings [1], there is much incentive to reduce

Cerpa, Alberto E.

440

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

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

Comparison of emerging diagnostic tools for large commercial HVAC systems  

E-Print Network [OSTI]

Tool UT (PG&E) WBE WBD OA/E PACRAT EEM Suite IMDS/ ElectricUT (PG&E) WBE WBD OA/E PACRAT EEM Suite Note 1: The user canDiagnostics from DDC Data PACRAT,” Proceedings of the 8 th

Friedman, Hannah; Piette, Mary Ann

2001-01-01T23:59:59.000Z

442

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

443

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

444

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

445

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

446

Evaluation of Emerging Diagnostic Tools for Commercial HVAC Systems  

E-Print Network [OSTI]

C. The Universal Translator?s primary strength is in synchronization of multiple data sources for use with both EMCS data and data loggers (Stroupe, 2000). The tool also has a semi-automated diagnostic module for economizers and a manual diagnostic... automated data acquisition and archiving for continuous analysis. By contrast, Tools A, B, and C require manual data acquisition and do not have archiving capabilities. Tools D and E create links to the location of the data that is collected in trend files...

Friedman, H.; Piette, M. A.

2001-01-01T23:59:59.000Z

447

Multi-Sensor Single-Actuator Control of HVAC Systems  

E-Print Network [OSTI]

It is common to control several rooms in a building with a single sensor in one of the rooms and a single actuator driving just one control element such as an air damper. New, low-cost, wireless sensor technology now offers the opportunity...

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

2002-01-01T23:59:59.000Z

448

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

449

Integration of HVAC System Design with Simplified Duct Distribution -  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergy Health andofIan Kalin About32C:\DocumentsProgram ManagementAdaptingBuilding

450

Energy Efficient HVAC System for Distributed Cooling/Heating with  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat PumpRecord ofESPC ENABLE:2009 DOEDeploymentHenry C. Foley AprilThermoelectric

451

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

E-Print Network [OSTI]

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

452

Demand Response-Enabled Model Predictive HVAC Load Control in Buildings using Real-Time Electricity Pricing.  

E-Print Network [OSTI]

??A practical cost and energy efficient model predictive control (MPC) strategy is proposed for HVAC load control under dynamic real-time electricity pricing. The MPC strategy… (more)

Avci, Mesut

2013-01-01T23:59:59.000Z

453

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

E-Print Network [OSTI]

Administration. April. EPRI. 1982. Residential End-UseInstitute. EA-2512. July. EPRI. 1990. REEPS 2.0 HVAC ModelInstitute. October 11. EPRI, Electric Power Research

Johnson, F.X.

2010-01-01T23:59:59.000Z

454

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

455

Simulated, Emulated, and Physical Investigative Analysis (SEPIA) of networked systems.  

SciTech Connect (OSTI)

This report describes recent progress made in developing and utilizing hybrid Simulated, Emulated, and Physical Investigative Analysis (SEPIA) environments. Many organizations require advanced tools to analyze their information system's security, reliability, and resilience against cyber attack. Today's security analysis utilize real systems such as computers, network routers and other network equipment, computer emulations (e.g., virtual machines) and simulation models separately to analyze interplay between threats and safeguards. In contrast, this work developed new methods to combine these three approaches to provide integrated hybrid SEPIA environments. Our SEPIA environments enable an analyst to rapidly configure hybrid environments to pass network traffic and perform, from the outside, like real networks. This provides higher fidelity representations of key network nodes while still leveraging the scalability and cost advantages of simulation tools. The result is to rapidly produce large yet relatively low-cost multi-fidelity SEPIA networks of computers and routers that let analysts quickly investigate threats and test protection approaches.

Burton, David P.; Van Leeuwen, Brian P.; McDonald, Michael James; Onunkwo, Uzoma A.; Tarman, Thomas David; Urias, Vincent E.

2009-09-01T23:59:59.000Z

456

Performance simulation of a MRPC-based PET Imaging System  

E-Print Network [OSTI]

The low cost and high resolution gas-based Multi-gap Resistive Plate Chamber (MRPC) opens a new possibility to find an efficient alternative detector for Time of Flight (TOF) based Positron Emission Tomography, where the sensitivity of the system depends largely on the time resolution of the detector. Suitable converters can be used to increase the efficiency of detection of photons from annihilation. In this work, we perform a detailed GEANT4 simulation to optimize the converter thickness thereby improving the efficiency of photon conversion. Also we have developed a Monte Carlo based simulation of MRPC response thereby obtaining the intrinsic time resolution of the detector, making it possible to simulate the final response of MRPC-based systems for PET imaging. The result of the cosmic ray test of a four-gap Bakelite-based MRPC operating in streamer mode is discussed.

A. Banerjee; S. Chattopadhyay

2011-06-29T23:59:59.000Z

457

Simulation of the TREAT-Upgrade Automatic Reactor Control System  

SciTech Connect (OSTI)

This paper describes the design of the Automatic Reactor Control System (ARCS) for the Transient Reactor Test Facility (TREAT) Upgrade. A simulation was used to facilitate the ARCS design and to completely test and verify its operation before installation at the TREAT facility.

Lipinski, W.C.; Kirsch, L.W.; Valente, A.D.

1984-01-01T23:59:59.000Z

458

Design, Analysis, and Simulation of Rocket Propulsion System  

E-Print Network [OSTI]

. The program currently provides a symbolic link in the form of a button on the output page which will open Unigraphics NX CAD program. The post-processing simulation of the rocket propulsion system is done in a computational fluid dynamics (CFD) program...

Kulhanek, Sarah Logan

2012-08-31T23:59:59.000Z

459

Modeling the Arterial System with Reference to an Anesthesia Simulator  

E-Print Network [OSTI]

Modeling the Arterial System with Reference to an Anesthesia Simulator Ph.D. Thesis 1 by Mette), and at the Department of Anesthesia, Herlev University Hospital. The study has been organized as an industrial Ph S.A. Pedersen, Roskilde University, and M.D. P.F. Jensen, Ph.D., Department of Anesthesia, Herlev

Olufsen, Mette Sofie

460

Systems and methods for controlling energy use in a building management system using energy budgets  

DOE Patents [OSTI]

Systems and methods for limiting power consumption by a heating, ventilation, and air conditioning (HVAC) subsystem of a building are shown and described. A feedback controller is used to generate a manipulated variable based on an energy use setpoint and a measured energy use. The manipulated variable may be used for adjusting the operation of an HVAC device.

Wenzel, Michael J; Drees, Kirk H

2014-09-23T23:59:59.000Z

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.


461

Analysis of the Energy Savings Potential in K-5 Schools in Hot and Humid Climates: Application of High Performance Measures and Renewable Energy Systems  

E-Print Network [OSTI]

-08-05 of the building. Since the DOE-2 simulation program is not capable of simulating solar thermal and PV systems, the F-Chart and PV F-Chart program were used to calculate the hot water and the electricity generation from a solar thermal and PV system... measures were applied to the target building. Those measures include: increased glazing U-value, VFD application for the HVAC system, cold deck reset, variable speed for pumps, high-efficiency boiler, skylights, and the application of solar thermal...

Im, P.; Haberl, J.

462

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

463

iPower: An Energy Conservation System for Intelligent Buildings by Wireless Sensor Networks  

E-Print Network [OSTI]

of energy consumption is spent on HVAC systems, which include heating, ventilating, air conditioning by HVAC systems is due to improper use of electric appliances. Therefore, how to exploit the context the electric appliances in the room through some power-line control devices. In this way, the iPower system can

Tseng, Yu-Chee

464

Compression effects on pressure loss in flexible HVAC ducts  

SciTech Connect (OSTI)

A study was conducted to evaluate the effect of compression on pressure drop in flexible, spiral wire helix core ducts used in residential and light commercial applications. Ducts of 6 inches, 8 inches and 10 inches (150, 200 and 250 mm) nominal diameters were tested under different compression configurations following ASHRAE Standard 120-1999--Methods of Testing to Determine Flow Resistance of HVAC Air Ducts and Fittings. The results showed that the available published references tend to underestimate the effects of compression. The study demonstrated that moderate compression in flexible ducts, typical of that often seen in field installations, could increase the pressure drop by a factor of four, while further compression could increase the pressure drop by factors close to ten. The results proved that the pressure drop correction factor for compressed ducts cannot be independent of the duct size, as suggested by ASHRAE Fundamentals, and therefore a new relationship was developed for better quantification of the pressure drop in flexible ducts. This study also suggests potential improvements to ASHRAE Standard 120-1999 and provides new data for duct design.

Abushakra, Bass; Walker, Iain S.; Sherman, Max H.

2002-07-01T23:59:59.000Z

465

Large-scale simulations of complex physical systems  

SciTech Connect (OSTI)

Scientific computing has become a tool as vital as experimentation and theory for dealing with scientific challenges of the twenty-first century. Large scale simulations and modelling serve as heuristic tools in a broad problem-solving process. High-performance computing facilities make possible the first step in this process - a view of new and previously inaccessible domains in science and the building up of intuition regarding the new phenomenology. The final goal of this process is to translate this newly found intuition into better algorithms and new analytical results.In this presentation we give an outline of the research themes pursued at the Scientific Computing Laboratory of the Institute of Physics in Belgrade regarding large-scale simulations of complex classical and quantum physical systems, and present recent results obtained in the large-scale simulations of granular materials and path integrals.

Belic, A. [Scientific Computing Laboratory, Institute of Physics, Pregrevica 118, 11080 Belgrade (Serbia and Montenegro)

2007-04-23T23:59:59.000Z

466

Generic solar photovoltaic system dynamic simulation model specification.  

SciTech Connect (OSTI)

This document is intended to serve as a specification for generic solar photovoltaic (PV) system positive-sequence dynamic models to be implemented by software developers and approved by the WECC MVWG for use in bulk system dynamic simulations in accordance with NERC MOD standards. Two specific dynamic models are included in the scope of this document. The first, a Central Station PV System model, is intended to capture the most important dynamic characteristics of large scale (> 10 MW) PV systems with a central Point of Interconnection (POI) at the transmission level. The second, a Distributed PV System model, is intended to represent an aggregation of smaller, distribution-connected systems that comprise a portion of a composite load that might be modeled at a transmission load bus.

Ellis, Abraham; Behnke, Michael Robert; Elliott, Ryan Thomas

2013-10-01T23:59:59.000Z

467

An Integrated System Simulation Approach for Wireless Networked Control Systems  

E-Print Network [OSTI]

Vanderbilt University Nashville, TN, USA Abstract--Cyber-Physical Systems (CPS), such as networked control wireless networks. Accurate modeling of these communication networks is essential in the design and verification of CPS. Controller design needs to take into ac- count the wireless channel characteristics (e

Koutsoukos, Xenofon D.

468

Simulation system provides unique training method for the oilfield  

SciTech Connect (OSTI)

Integrated services and turnkey operations are becoming the norm for the industry, and oilfield service companies are finding themselves linked with operators and contractors in long-term service contracts that would never have been considered in the 1980`s. In this paper, the authors discuss a unique simulator that can resolve the training needs that have surfaced as a result of the rapidly changing operational concepts in the oilfield environment. They will present the concepts of the equipment simulator and capabilities of the global simulator methodology, and they will use an actual case history to describe in detail how the equipment simulator was used offshore on a recent well-test job in the Gulf Coast area to introduce a new well-test tool and to train a new design engineer. With this information, the authors conclude that the use of the simulator will provide unparalleled training support for oilfield equipment and system applications and facilitate efficient development of integrated solutions for oilfield projects.

Beck, K. [Halliburton Energy Service, Dallas, TX (United States). Dallas Technology Center; Schwendemann, K. [Halliburton Energy Service, Carrollton, TX (United States). Dallas/Fort Worth Technology Center

1997-02-01T23:59:59.000Z

469

The Development of A Human Systems Simulation Laboratory: Strategic Direction  

SciTech Connect (OSTI)

The Human System Simulation Laboratory (HSSL) at the Idaho National Laboratory is one of few facilities of its kind that allows human factors researchers to evaluate various aspects of human performance and human system interaction for proposed reactor designs and upgrades. A basic system architecture, physical configuration and simulation capability were established to enable human factors researchers to support multiple, simultaneous simulations and also different power plant technologies. Although still evolving in terms of its technical and functional architecture, the HSSL is already proving its worth in supporting current and future nuclear industry needs for light water reactor sustainability and small modular reactors. The evolution of the HSSL is focused on continual physical and functional refinement to make it a fully equipped, reconfigurable facility where advanced research, testing and validation studies can be conducted on a wider range of reactor technologies. This requires the implementation of additional plant models to produce empirical research data on human performance with emerging human-system interaction technologies. Additional beneficiaries of this information include system designers and HRA practitioners. To ensure that results of control room crew studies will be generalizable to the existing and evolving fleet of US reactors, future expansion of the HSSL may also include other SMR plant models, plant-specific simulators and a generic plant model aligned to the current generation of pressurized water reactors (PWRs) and future advanced reactor designs. Collaboration with industry partners is also proving to be a vital component of the facility as this helps to establish a formal basis for current and future human performance experiments to support nuclear industry objectives. A long-range Program Plan has been developed for the HSSL to ensure that the facility will support not only the Department of Energy’s Light Water Reactor Sustainability Program, but also to provide human factors guidance for all future developments of the nuclear industry.

Jacques Hugo; Katya le Blanc; David Gertman

2012-07-01T23:59:59.000Z

470

A graphical electromagnetic simulation laboratory for power systems engineering programs  

SciTech Connect (OSTI)

The recent availability of Electromagnetic Transient Programs with graphical front ends now makes it possible to put together models for circuits and systems in a manner similar to the connection of components in a laboratory. In the past, the non-graphical EMT Programs required considerable expertise in their use and thus distracted the students into the details or simulation. The introduction of a graphical simulation based laboratory into Undergraduate and Graduate Engineering Programs is presented, based on the PSCAD/EMTDC program. The philosophy behind the design of suitable example cases is presented within the framework of an Undergraduate Power Electronics Course, an HVdc Transmission Course and a course on Power System Protection.

Gole, A.M. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [Manitoba HVDC Research Centre, Winnipeg, Manitoba (Canada)] [Manitoba HVDC Research Centre, Winnipeg, Manitoba (Canada); Sidhu, T.S.; Sachdev, M.S. [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada)] [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada)

1996-05-01T23:59:59.000Z

471

CLARREO shortwave observing system simulation experiments of the twenty-first century: Simulator design and implementation  

SciTech Connect (OSTI)

Projected changes in the Earth system will likely be manifested in changes in reflected solar radiation. This paper introduces an operational Observational System Simulation Experiment (OSSE) to calculate the signals of future climate forcings and feedbacks in top-of-atmosphere reflectance spectra. The OSSE combines simulations from the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report for the NCAR Community Climate System Model (CCSM) with the MODTRAN radiative transfer code to calculate reflectance spectra for simulations of current and future climatic conditions over the 21st century. The OSSE produces narrowband reflectances and broadband fluxes, the latter of which have been extensively validated against archived CCSM results. The shortwave reflectance spectra contain atmospheric features including signals from water vapor, liquid and ice clouds, and aerosols. The spectra are also strongly influenced by the surface bidirectional reflectance properties of predicted snow and sea ice and the climatological seasonal cycles of vegetation. By comparing and contrasting simulated reflectance spectra based on emissions scenarios with increasing projected and fixed present-day greenhouse gas and aerosol concentrations, we find that prescribed forcings from increases in anthropogenic sulfate and carbonaceous aerosols are detectable and are spatially confined to lower latitudes. Also, changes in the intertropical convergence zone and poleward shifts in the subsidence zones and the storm tracks are all detectable along with large changes in snow cover and sea ice fraction. These findings suggest that the proposed NASA Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission to measure shortwave reflectance spectra may help elucidate climate forcings, responses, and feedbacks.

Feldman, D.R.; Algieri, C.A.; Ong, J.R.; Collins, W.D.

2011-04-01T23:59:59.000Z

472

An indoorâ??outdoor building energy simulator to study urban modification effects on building energy use â?? Model description and validation  

E-Print Network [OSTI]

simulating effects of the waste heat from air?conditioning 8]). Anthropogenic waste heat (e.g. from transportation,temperature and HVAC waste heat from EnergyPlus are passed

Yaghoobian, Neda; Kleissl, Jan

2012-01-01T23:59:59.000Z

473

SYSTEM PLANNING WITH THE HANFORD WASTE OPERATIONS SIMULATOR  

SciTech Connect (OSTI)

At the U. S. Department of Energy's Hanford Site in southeastern Washington State, 216 million liters (57 million gallons) of nuclear waste is currently stored in aging underground tanks, threatening the Columbia River. The River Protection Project (RPP), a fully integrated system of waste storage, retrieval, treatment, and disposal facilities, is in varying stages of design, construction, operation, and future planning. These facilities face many overlapping technical, regulatory, and financial hurdles to achieve site cleanup and closure. Program execution is ongoing, but completion is currently expected to take approximately 40 more years. Strategic planning for the treatment of Hanford tank waste is by nature a multi-faceted, complex and iterative process. To help manage the planning, a report referred to as the RPP System Plan is prepared to provide a basis for aligning the program scope with the cost and schedule, from upper-tier contracts to individual facility operating plans. The Hanford Tank Waste Operations Simulator (HTWOS), a dynamic flowsheet simulation and mass balance computer model, is used to simulate the current planned RPP mission, evaluate the impacts of changes to the mission, and assist in planning near-term facility operations. Development of additional modeling tools, including an operations research model and a cost model, will further improve long-term planning confidence. The most recent RPP System Plan, Revision 4, was published in September 2009.

CRAWFORD TW; CERTA PJ; WELLS MN

2010-01-14T23:59:59.000Z

474

Instabilities simulations with wideband feedback systems: CMAD, HEADTAIL, WARP  

E-Print Network [OSTI]

Transverse mode coupling (TMCI) and electron cloud instabilities (ECI) pose fundamental limitations on the acceptable beam intensities in the SPS at CERN. This in turn limits the ultimate achievable luminosity in the LHC. Therefore, future luminosity upgrades foresee methods for evading TMCI as well as ECI. Proposed approaches within the LHC Injector Upgrade (LIU) project include new optics with reduced transition energy as well as vacuum chamber coating techniques. As a complementary option, high bandwidth feedback systems may provide instability mitigation by actively damping the intra-bunch motion of unstable modes. In an effort to evaluate the potentials and limitations of such feedback systems and to characterise some of the specifications, a numerical model of a realistic feedback system has been developed and integrated into available instabilities simulation codes. Together with the implementation of this new feedback system model, CMAD and HEADTAIL have been used to investigate the impact of differen...

Li, Kevin; Fox, J D; Pivi, M; Rivetta, C; Rumolo, G

2013-01-01T23:59:59.000Z

475

A Virtual Engineering Framework for Simulating Advanced Power System  

SciTech Connect (OSTI)

In this report is described the work effort performed to provide NETL with VE-Suite based Virtual Engineering software and enhanced equipment models to support NETL's Advanced Process Engineering Co-simulation (APECS) framework for advanced power generation systems. Enhancements to the software framework facilitated an important link between APECS and the virtual engineering capabilities provided by VE-Suite (e.g., equipment and process visualization, information assimilation). Model enhancements focused on improving predictions for the performance of entrained flow coal gasifiers and important auxiliary equipment (e.g., Air Separation Units) used in coal gasification systems. In addition, a Reduced Order Model generation tool and software to provide a coupling between APECS/AspenPlus and the GE GateCycle simulation system were developed. CAPE-Open model interfaces were employed where needed. The improved simulation capability is demonstrated on selected test problems. As part of the project an Advisory Panel was formed to provide guidance on the issues on which to focus the work effort. The Advisory Panel included experts from industry and academics in gasification, CO2 capture issues, process simulation and representatives from technology developers and the electric utility industry. To optimize the benefit to NETL, REI coordinated its efforts with NETL and NETL funded projects at Iowa State University, Carnegie Mellon University and ANSYS/Fluent, Inc. The improved simulation capabilities incorporated into APECS will enable researchers and engineers to better understand the interactions of different equipment components, identify weaknesses and processes needing improvement and thereby allow more efficient, less expensive plants to be developed and brought on-line faster and in a more cost-effective manner. These enhancements to APECS represent an important step toward having a fully integrated environment for performing plant simulation and engineering. Furthermore, with little effort the modeling capabilities described in this report can be extended to support other DOE programs, such as ultra super critical boiler development, oxy-combustion boiler development or modifications to existing plants to include CO2 capture and sequestration.

Mike Bockelie; Dave Swensen; Martin Denison; Stanislav Borodai

2008-06-18T23:59:59.000Z

476

Screening analysis for EPACT-covered commercial HVAC and water-heating equipment  

SciTech Connect (OSTI)

EPCA requirements state that if the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE) amends efficiency levels prescribed in Standard 90.1-1989, then DOE must establish an amended uniform national manufacturing standard at the minimum level specified in amended Standard 90.1. However, DOE can establish higher efficiency levels if it can show through clear and convincing evidence that a higher efficiency level, that is technologically feasible and economically justified, would produce significant additional energy savings. On October 29, 1999, ASHRAE approved the amended Standard 90.1, which increases the minimum efficiency levels for some of the commercial heating, cooling, and water-heating equipment covered by EPCA 92. DOE asked Pacific Northwest National Laboratory (PNNL) to conduct a screening analysis to determine the energy-savings potential of the efficiency levels listed in Standard 90.1-1999. The analysis estimates the annual national energy consumption and the potential for energy savings that would result if the EPACT-covered products were required to meet these efficiency levels. The analysis also estimates additional energy-savings potential for the EPACT-covered products if they were to exceed the efficiency levels prescribed in Standard 90-1-1999. In addition, a simple life-cycle cost (LCC) analysis was performed for some alternative efficiency levels. This paper will describe the methodology, data assumptions, and results of the analysis. The magnitude of HVAC and SWH loads imposed on equipment depends on the building's physical and operational characteristics and prevailing climatic conditions. To address this variation in energy use, coil loads for 7 representative building types at 11 climate locations were estimated based on a whole-building simulation.

S Somasundaram; PR Armstrong; DB Belzer; SC Gaines; DL Hadley; S Katipumula; DL Smith; DW Winiarski

2000-05-25T23:59:59.000Z

477

Simulation of the treat-upgrade automatic reactor control system  

SciTech Connect (OSTI)

This paper describes the design of the Automatic Reactor Control System (ARCS) for the Transient Reactor Test Facility (TREAT) Upgrade. A simulation was used to facilitate the ARCS design, and to completely test and verify its operation before installation at the TREAT facility. The ARCS is a microprocessor network based closed loop control system that provides a position demand control signal to the transient rod hydraulic drive system. There are four identical servo-hydraulic rod drives and each operates as a position control system. The ARCS updates its position demand control signal every 1 msec and its function is to control the transient rods so that the reactor follows a prescribed power-time profile (planned transient). The Main Control Algorithm (MCA) for the ARCS is an optimal reactivity demand algorithm. At each time step, the MCA generates a set of reference reactor functions, e.g., power, period, energy, and delayed neutron power. These functions are compared to plant measurements and estimated values at each time step and are operated on by appropriate algorithms to generate the reactivity demand function. The data necessary to calculate the reference functions is supplied from a Transient Prescription Control Data Set (TPCDS). The TPCDS specifies the planned transient as a fixed number of simply connected independent power profile segments. The developed simulation code models the TREAT reactor kinetics, the hydraulic rod drive system, the plant measurement system, and the ARCS control processor MCA. All of the models operate as continuous systems with the exception of the MCA which operates as a discrete time system at fixed multiples of 1 msec. The study indicates that the ARCS will meet or exceed all of its design specifications.

Lipinski, W.C.; Kirsch, L.W.; Valente, A.D.

1985-02-01T23:59:59.000Z

478

Simulations of strongly phase-separated liquid-gas systems  

E-Print Network [OSTI]

Lattice Boltzmann simulations of liquid-gas systems are believed to be restricted to modest density ratios of less than 10. In this article we show that reducing the speed of sound and, just as importantly, the interfacial contributions to the pressure allows lattice Boltzmann simulations to achieve high density ratios of 1000 or more. We also present explicit expressions for the limits of the parameter region in which the method gives accurate results. There are two separate limiting phenomena. The first is the stability of the bulk liquid phase. This consideration is specific to lattice Boltzmann methods. The second is a general argument for the interface discretization that applies to any diffuse interface method.

A. J. Wagner; C. M. Pooley

2006-08-22T23:59:59.000Z

479

Energy Management and Information Systems  

E-Print Network [OSTI]

?infrastructure energy?audits,?HVAC?upgrades,? heat?recovery,?etc. Improve?operations processes?and?day?to?day? operations,?retro? commissioning ENERGY?MANAGEMENT?INFORMATION?SYSTEM the?project Hardware ? $3.0?million?investment ? 400+?meters...

Conraud, J.

2013-01-01T23:59:59.000Z

480

Comparison Between TRNSYS Software Simulation and PV F-Chart Program on Photovoltaic System  

E-Print Network [OSTI]

This report covers the comparisons of Photovoltaic System by TRNSYS simulation and PV F-Chart program to test TRNSYS simulation accuracy. The report starts with the Photovoltaic (PV) (PV) System introduction in Section one which is followed...

Haberl, J. S.; Baltazar, J. C.; Mao, C.

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.


481

Development of Design and Simulation Tool for Hybrid Geothermal Heat Pump System  

Broader source: Energy.gov [DOE]

This project will expand Expand eQUEST, a building energy analysis software with latest implementation of DOE-2, for simulations of HGSHP systems and improve its existing simulation capabilities for ordinary GSHP systems.

482

Spreader-Bar Radiation Detection System Enhancements: A Modeling and Simulation Study  

SciTech Connect (OSTI)

This report provides the modeling and simulation results of the investigation of enhanced spreader bar radiation detection systems.

Ely, James H.; Ashbaker, Eric D.; Batdorf, Michael T.; Baciak, James E.; Hensley, Walter K.; Jarman, Kenneth D.; Robinson, Sean M.; Sandness, Gerald A.; Schweppe, John E.

2012-11-13T23:59:59.000Z

483

Finite element simulations of hydrodynamic trapping in microfluidic particle-trap array systems  

E-Print Network [OSTI]

Finite element simulations of hydrodynamic trapping in microfluidic particle- trap array systems;Finite element simulations of hydrodynamic trapping in microfluidic particle-trap array systems Xiaoxiao) simulation is a powerful tool in the design and implementation of microfluidic systems, especially

Nehorai, Arye

484

Designing Better Scaffolding in Simulation-Based Learning Environments Teaching Science Systems: A Pilot Study Report  

E-Print Network [OSTI]

Designing Better Scaffolding in Simulation-Based Learning Environments Teaching Science Systems strong science background. They were asked to learn a chemical system in a simulation-based environment; simulation-based learning environments; scaffolding. Research Background Systems thinking skills have become

485

Visualization and continuous simulation of a space nuclear power system  

E-Print Network [OSTI]

2 Design of reactor system developed using graphical editor 17 3 Front end of Omega 4 Color Scale Editor . 19 21 5 Color Scale Editor with a more continuous scale 23 6 User Interface of Xcigs 25 7 Selection of particular component and cell... mathematical model is used to represent a physical or a hypothetical design of a space nuclear reactor. Thermal hydraulic analysis programs (such as CENTAR [5, 4], TRAC [2], and RELAP [6]) perform analysis on such models and produce simulation results...

Rawal, Rajiv

1992-01-01T23:59:59.000Z

486

Lattice simulations for few- and many-body systems  

E-Print Network [OSTI]

We review the recent literature on lattice simulations for few- and many-body systems. We focus on methods and results that combine the framework of effective field theory with computational lattice methods. Lattice effective field theory is discussed for cold atoms as well as low-energy nucleons with and without pions. A number of different lattice formulations and computational algorithms are considered, and an effort is made to show common themes in studies of cold atoms and low-energy nuclear physics as well as common themes in work by different collaborations.

Dean Lee

2008-12-13T23:59:59.000Z

487

A high-performance workflow system for subsurface simulation  

SciTech Connect (OSTI)

Subsurface modeling applications typically neglect uncertainty in the conceptual models, past or future scenarios, and attribute most or all uncertainty to errors in model parameters. In this contribution, uncertainty in technetium-99 transport in a heterogeneous, deep vadose zone is explored with respect to the conceptual model using a next generation user environment called Akuna. Akuna provides a range of tools to manage environmental modeling projects, from managing simulation data to visualizing results from high-performance computational simulators. Core toolsets accessible through the user interface include model setup, grid generation, parameter estimation, and uncertainty quantification. The BC Cribs site at Hanford in southeastern Washington State is used to demonstrate Akuna capabilities. At the BC Cribs site, conceptualization of the system is highly uncertain because only sparse information is available for the geologic conceptual model, the physical and chemical properties of the sediments, and the history of waste disposal operations. Using the Akuna toolset to perform an analysis of conservative solute transport, significant prediction uncertainty in simulated concentrations is demonstrated by conceptual model variation. This demonstrates that conceptual model uncertainty is an important consideration in sparse data environments such as BC Cribs. It is also demonstrated that Akuna and the underlying toolset provides an integrated modeling environment that streamlines model setup, parameter optimization, and uncertainty analyses for high-performance computing applications.

Freedman, Vicky L.; Chen, Xingyuan; Finsterle, Stefan A.; Freshley, Mark D.; Gorton, Ian; Gosink, Luke J.; Keating, Elizabeth; Lansing, Carina; Moeglein, William AM; Murray, Christopher J.; Pau, George Shu Heng; Porter, Ellen A.; Purohit, Sumit; Rockhold, Mark L.; Schuchardt, Karen L.; Sivaramakrishnan, Chandrika; Vesselinov, Velimir V.; Waichler, Scott R.

2014-02-14T23:59:59.000Z

488

A Study of Pressure Losses in Residential Air Distribution Systems Bass Abushakra Iain S. Walker Max H. Sherman  

E-Print Network [OSTI]

. The experimental tests conformed to ASHRAE Standard 120P ­ Methods of Testing to Determine Flow Resistance of HVAC on the power consumption and the overall performance of the HVAC system. To satisfy the ARI 210 in the air-distribution system is critical. Proctor and Parker (2000) noted that the measured external static

489

VOLUME 11, NUMBER 2 HVAC&R RESEARCH APRIL 2005 An Optimization-Based Approach for  

E-Print Network [OSTI]

of energy consumption, and human comfort requirements. This paper presents a daily energy management in view of rising energy costs, the government mandate on reduction of energy consumption (Capehart et al requirements. A major portion of energy consumption of a building comes from HVAC units. For example

Luh, Peter

490

Improving Domotic Services Combining a Dialog System and a Resident Tracking System  

E-Print Network [OSTI]

equip a house nowadays include: alarm systems, HVAC systems (Heating, Ventilation, and Air Conditioning, consider a lights remote control: if the resident has a wireless remote control with which he can control

Instituto de Sistemas e Robotica

491

Model Code for the Control of Residential HVAC Distribution System Leakage and HVAC-Induced Building Leakage  

E-Print Network [OSTI]

, Underwriters Laboratories, Inc., the Air Conditioning Contractors Of America, the Thermal Insulation Manufacturers Association, the National Fire Protection Association, and the Gypsum Association....

Wemhoff, P.

1990-01-01T23:59:59.000Z

492

User Simulation in Dialogue Systems using Inverse Reinforcement Learning Senthilkumar Chandramohan 1,3  

E-Print Network [OSTI]

User Simulation in Dialogue Systems using Inverse Reinforcement Learning Senthilkumar Chandramohan based on Inverse Reinforcement Learning (IRL). The task of building the user simulator is perceived is an expensive process. User simulators aim at simulating human users in order to generate synthetic data

Paris-Sud XI, Université de

493

Applications of Ontologies for Assembling Simulation Models of Industrial Systems  

E-Print Network [OSTI]

-automated semantic engine that assembles the simulation model. We represent a structure of a real industrial plant in a plant ontology and available simulation blocks in a simulation ontology. Signals of each simulation critical scenarios of nuclear power plants [9]. As some real experiments cannot be repeated under the same

494

Residential Real-time Price Response Simulation  

SciTech Connect (OSTI)

The electric industry is gaining experience with innovative price responsive demand pilots and limited roll-outs to customers. One of these pilots is investigating real-time pricing signals to engage end-use systems and local distributed generation and storage in a distributed optimization process. Attractive aspects about the approach include strong scalability characteristics, simplified interfaces between automation devices, and the adaptability to integrate a wide variety of devices and systems. Experience in this nascent field is revealing a rich array of for engineering decisions and the application of complexity theory. To test the decisions, computer simulations are used to reveal insights about design, demand elasticity, and the limits of response (including consumer fatigue). Agent-based approaches lend themselves well in the simulation to modeling the participation and interaction of each piece of equipment on a distribution feeder. This paper discusses rate design and simulation experiences at the distribution feeder level where consumers and their HVAC systems and water heaters on a feeder receive real-time pricing signals.

Widergren, Steven E.; Subbarao, Krishnappa; Chassin, David P.; Fuller, Jason C.; Pratt, Robert G.

2011-10-10T23:59:59.000Z

495

Toward Green Systems for Cleanrooms: Energy Efficient Fan-filter Units Ming-Shan Jeng, Industrial Technology Research Institute, msjeng@itri.org.tw  

E-Print Network [OSTI]

of twenty FFUs collected from the market were tested, including thirteen 1220 mm x 610 mm (or 4 ft x 2 ft technology with architecture and natural resources. Cleanroom HVAC systems account for a large portion of energy use in cleanrooms. Improving energy efficiency of HVAC systems and their components can contribute

496

Simulated watershed responses to land cover changes using the Regional Hydro-Ecological Simulation System  

E-Print Network [OSTI]

Simulated watershed responses to land cover changes using the Regional Hydro-Ecological Simulation Old Main Hill, Logan, UT, 84322-8200, USA Abstract: In this work, we used the Regional Hydro

Tarboton, David

497

Proceedings of Healthy Buildings 2009 Paper 474 Impacts of HVAC Filtration on Air-Conditioner Energy Consumption in  

E-Print Network [OSTI]

Proceedings of Healthy Buildings 2009 Paper 474 Impacts of HVAC Filtration on Air efficiency filters (Points A, B, and C, respectively). #12;Proceedings of Healthy Buildings 2009 Paper 474

Siegel, Jeffrey

498

Dynamic Simulation and Optimization of Nuclear Hydrogen Production Systems  

SciTech Connect (OSTI)

This project is part of a research effort to design a hydrogen plant and its interface with a nuclear reactor. This project developed a dynamic modeling, simulation and optimization environment for nuclear hydrogen production systems. A hybrid discrete/continuous model captures both the continuous dynamics of the nuclear plant, the hydrogen plant, and their interface, along with discrete events such as major upsets. This hybrid model makes us of accurate thermodynamic sub-models for the description of phase and reaction equilibria in the thermochemical reactor. Use of the detailed thermodynamic models will allow researchers to examine the process in detail and have confidence in the accurary of the property package they use.

Paul I. Barton; Mujid S. Kaximi; Georgios Bollas; Patricio Ramirez Munoz

2009-07-31T23:59:59.000Z

499

Use of Building Automation System Trend Data for Inputs Generation in Bottom-Up Simulation Calibration  

E-Print Network [OSTI]

for analysis and use in simulation is very large. This paper explores automating the process of generating inputs from Building Automation System (BAS) trend data for use in building simulation software. A proof-of-concept prototype called the Automatic...

Zibin, N. F.; Zmeureanu, R. G.; Love, J. A.

2013-01-01T23:59:59.000Z

500

Performance comparison of U.K. low-energy cooling systems by energy simulation  

E-Print Network [OSTI]

Building energy simulation is an important tool for evaluating the energy consumption of a building and can provide guidance in the design of a building and its mechanical systems. EnergyPlus is a new energy simulation ...

Olsen, Erik L. (Erik Lee), 1979-

2002-01-01T23:59:59.000Z