Using EnergyPlus for California Title-24 compliance calculations

TitleUsing EnergyPlus for California Title-24 compliance calculations
Publication TypeConference Paper
Year of Publication2006
AuthorsHuang, Yu Joe, Norman Bourassa, Walter F. Buhl, Ender Erdem, and Robert J. Hitchcock
Conference NameSimBuild 2006
Date Published08/2006
Conference LocationCambridge, MA
Call NumberLBNL-61527

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.

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