TY - CONF T1 - An Improved Simple Chilled Water Cooling Coil Model T2 - SimBuild 2012 IBPSA Conference Y1 - 2012 A1 - Liping Wang A1 - Philip Haves A1 - Walter F. Buhl AB -
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.
JF - SimBuild 2012 IBPSA Conference U2 - LBNL-6031E ER - TY - JOUR T1 - Comparing computer run time of building simulation programs JF - Building Simulation Y1 - 2008 A1 - Tianzhen Hong A1 - Walter F. Buhl A1 - Philip Haves A1 - Stephen E. Selkowitz A1 - Michael Wetter KW - computer run time KW - doe-2 KW - energyplus KW - simulation program AB -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.
VL - 1 IS - 3 ER - TY - RPRT T1 - EnergyPlus Analysis Capabilities for Use in Title 24 Y1 - 2008 A1 - Tianzhen Hong A1 - Walter F. Buhl A1 - Philip Haves KW - building simulation KW - code compliance KW - energyplus KW - title 24 PB - LBNL UR - http://www.escholarship.org/uc/item/0z78090x U2 - LBNL-822E ER - TY - RPRT T1 - EnergyPlus Run Time Analysis Y1 - 2008 A1 - Tianzhen Hong A1 - Walter F. Buhl A1 - Philip Haves PB - LBNL UR - http://escholarship.org/uc/item/36h4m5z0 U2 - LBNL-1311E ER - TY - RPRT T1 - Energy Performance of Underfloor Air Distribution Systems Y1 - 2007 A1 - Fred S. Bauman A1 - Thomas L. Webster A1 - Hui Jin A1 - Wolfgang Lukaschek A1 - Corinne Benedek A1 - Edward A. Arens A1 - Paul F. Linden A1 - Anna Lui A1 - Walter F. Buhl A1 - Darryl J. Dickerhoff PB - California Energy Commission - Public Interest Energy Research Program ER - TY - Generic T1 - Using EnergyPlus for California Title-24 Compliance Calculations T2 - SimBuild 2006 Y1 - 2006 A1 - Yu Joe Huang A1 - Norman Bourassa A1 - Walter F. Buhl A1 - Ender Erdem A1 - Robert J. Hitchcock JF - SimBuild 2006 CY - Cambridge, MA, USA ER - TY - CONF T1 - Using EnergyPlus for California Title-24 compliance calculations T2 - SimBuild 2006 Y1 - 2006 A1 - Yu Joe Huang A1 - Norman Bourassa A1 - Walter F. Buhl A1 - Ender Erdem A1 - Robert J. Hitchcock AB -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.
JF - SimBuild 2006 CY - Cambridge, MA U1 -Simulation Research Group
U2 - LBNL-61527 ER - TY - Generic T1 - EnergyPlus: An Update T2 - SimBuild 2004, Building Sustainability and Performance Through Simulation Y1 - 2004 A1 - Drury B. Crawley A1 - Linda K. Lawrie A1 - Curtis O. Pedersen A1 - Frederick C. Winkelmann A1 - Michael J. Witte A1 - Richard K. Strand A1 - Richard J. Liesen A1 - Walter F. Buhl A1 - Yu Joe Huang A1 - Robert H. Henninger A1 - Jason Glazer A1 - Daniel E. Fisher A1 - Don B. Shirley A1 - Brent T. Griffith A1 - Peter G. Ellis A1 - Lixing Gu JF - SimBuild 2004, Building Sustainability and Performance Through Simulation CY - Boulder, Colorado, USA ER - TY - CONF T1 - The DOE-2 Computer Program for Thermal Simulation of Buildings T2 - American Institute of Physics (AIP) Y1 - 1985 A1 - Birdsall, Bruce E. A1 - Walter F. Buhl A1 - Richard B. Curtis A1 - Ender Erdem A1 - Joseph Eto A1 - James J. Hirsch A1 - Karen H. Olson A1 - Frederick C. Winkelmann JF - American Institute of Physics (AIP) PB - American Institute of Physics VL - 135 ER - TY - Generic T1 - New Features of the DOE-2.1c Energy Analysis Program T2 - International Building Performance Simulation Association Y1 - 1985 A1 - Walter F. Buhl A1 - Ender Erdem A1 - Joseph H. Eto A1 - James J. Hirsch A1 - Frederick C. Winkelmann JF - International Building Performance Simulation Association PB - International Building Performance Simulation Association UR - http://www.ibpsa.org/proceedings/BS1985/BS85_195_200.pdf ER - TY - CONF T1 - The DOE-2 Building Energy Analysis Program T2 - ASEAN Conference on Energy Conservation in Buildings Y1 - 1984 A1 - Richard B. Curtis A1 - Birdsall, Bruce E. A1 - Walter F. Buhl A1 - Ender Erdem A1 - Joseph H. Eto A1 - James J. Hirsch A1 - Karen H. Olson A1 - Frederick C. Winkelmann JF - ASEAN Conference on Energy Conservation in Buildings CY - Singapore U2 - LBNL-18046 ER -