%0 Conference Paper %B SimBuild 2012 IBPSA Conference %D 2012 %T An Improved Simple Chilled Water Cooling Coil Model %A Liping Wang %A Philip Haves %A Walter F. Buhl %X

The accurate prediction of cooling and dehumidification coil performance is important in model-based fault detection and in the prediction of HVAC system energy consumption for support of both design and operations. It is frequently desirable to use a simple cooling coil model that does not require detailed specification of coil geometry and material properties. The approach adopted is to match the overall UA of the coil to the rating conditions and to estimate the air-side and water-side components of the UA using correlations developed by Holmes (1982). This approach requires some geometrical information about the coil and the paper investigates the sensitivity of the overall performance prediction to uncertainties in this information, including assuming a fixed ratio of air-side to water-side UA at the rating condition. Finally, simulation results from different coil models are compared, and experimental data are used to validate the improved cooling coil model.

%B SimBuild 2012 IBPSA Conference %8 08/2012 %2 LBNL-6031E %0 Journal Article %J Building Simulation %D 2008 %T Comparing computer run time of building simulation programs %A Tianzhen Hong %A Walter F. Buhl %A Philip Haves %A Stephen E. Selkowitz %A Michael Wetter %K computer run time %K doe-2 %K energyplus %K simulation program %X

This paper presents an approach to comparing computer run time of building simulation programs. The computing run time of a simulation program depends on several key factors, including the calculation algorithm and modeling capabilities of the program, the run period, the simulation time step, the complexity of the energy models, the run control settings, and the software and hardware configurations of the computer that is used to make the simulation runs. To demonstrate the approach, simulation runs are performed for several representative DOE-2.1E and EnergyPlus energy models. The computer run time of these energy models are then compared and analyzed.

%B Building Simulation %V 1 %P 210-213 %8 2008 %G eng %N 3 %R 10.1007/s12273-008-8123-y %0 Report %D 2008 %T EnergyPlus Analysis Capabilities for Use in Title 24 %A Tianzhen Hong %A Walter F. Buhl %A Philip Haves %K building simulation %K code compliance %K energyplus %K title 24 %I LBNL %8 2008 %G eng %U http://www.escholarship.org/uc/item/0z78090x %2 LBNL-822E %0 Report %D 2008 %T EnergyPlus Run Time Analysis %A Tianzhen Hong %A Walter F. Buhl %A Philip Haves %I LBNL %8 2008 %G eng %U http://escholarship.org/uc/item/36h4m5z0 %2 LBNL-1311E %0 Report %D 2007 %T Energy Performance of Underfloor Air Distribution Systems %A Fred S. Bauman %A Thomas L. Webster %A Hui Jin %A Wolfgang Lukaschek %A Corinne Benedek %A Edward A. Arens %A Paul F. Linden %A Anna Lui %A Walter F. Buhl %A Darryl J. Dickerhoff %I California Energy Commission - Public Interest Energy Research Program %G eng %0 Conference Proceedings %B SimBuild 2006 %D 2006 %T Using EnergyPlus for California Title-24 Compliance Calculations %A Yu Joe Huang %A Norman Bourassa %A Walter F. Buhl %A Ender Erdem %A Robert J. Hitchcock %B SimBuild 2006 %C Cambridge, MA, USA %8 08/2006 %G eng %0 Conference Paper %B SimBuild 2006 %D 2006 %T Using EnergyPlus for California Title-24 compliance calculations %A Yu Joe Huang %A Norman Bourassa %A Walter F. Buhl %A Ender Erdem %A Robert J. Hitchcock %X

For the past decade, the non-residential portion of California's Title-24 building energy standard has relied on DOE-2.1E as the reference computer simulation program for development as well as compliance. However, starting in 2004, the California Energy Commission has been evaluating the possible use of EnergyPlus as the reference program in future revisions of Title-24. As part of this evaluation, the authors converted the Alternate Compliance Method (ACM) certification test suite of 150 DOE-2 files to EnergyPlus, and made parallel DOE-2 and EnergyPlus runs for this extensive set of test cases. A customized version of DOE-2.1E named doe2ep was developed to automate the conversion process. This paper describes this conversion process, including the difficulties in establishing an apples-to-apples comparison between the two programs, and summarizes how the DOE-2 and EnergyPlus results compare for the ACM test cases.

%B SimBuild 2006 %C Cambridge, MA %8 08/2006 %G eng %L LBNL-61527 %1

Simulation Research Group

%2 LBNL-61527 %0 Conference Proceedings %B SimBuild 2004, Building Sustainability and Performance Through Simulation %D 2004 %T EnergyPlus: An Update %A Drury B. Crawley %A Linda K. Lawrie %A Curtis O. Pedersen %A Frederick C. Winkelmann %A Michael J. Witte %A Richard K. Strand %A Richard J. Liesen %A Walter F. Buhl %A Yu Joe Huang %A Robert H. Henninger %A Jason Glazer %A Daniel E. Fisher %A Don B. Shirley %A Brent T. Griffith %A Peter G. Ellis %A Lixing Gu %B SimBuild 2004, Building Sustainability and Performance Through Simulation %C Boulder, Colorado, USA %8 08/2004 %G eng %0 Conference Paper %B American Institute of Physics (AIP) %D 1985 %T The DOE-2 Computer Program for Thermal Simulation of Buildings %A Birdsall, Bruce E. %A Walter F. Buhl %A Richard B. Curtis %A Ender Erdem %A Joseph Eto %A James J. Hirsch %A Karen H. Olson %A Frederick C. Winkelmann %B American Institute of Physics (AIP) %I American Institute of Physics %V 135 %8 01/1985 %R 10.1063/1.35478 %0 Conference Proceedings %B International Building Performance Simulation Association %D 1985 %T New Features of the DOE-2.1c Energy Analysis Program %A Walter F. Buhl %A Ender Erdem %A Joseph H. Eto %A James J. Hirsch %A Frederick C. Winkelmann %B International Building Performance Simulation Association %I International Building Performance Simulation Association %8 01/1985 %U http://www.ibpsa.org/proceedings/BS1985/BS85_195_200.pdf %0 Conference Paper %B ASEAN Conference on Energy Conservation in Buildings %D 1984 %T The DOE-2 Building Energy Analysis Program %A Richard B. Curtis %A Birdsall, Bruce E. %A Walter F. Buhl %A Ender Erdem %A Joseph H. Eto %A James J. Hirsch %A Karen H. Olson %A Frederick C. Winkelmann %B ASEAN Conference on Energy Conservation in Buildings %C Singapore %8 05/1984 %2 LBNL-18046