Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Update of ASHRAE Standard 140/BESTEST thermal fabric test cases

Zhou Xin 9, Joel Neymark 1, Ronald Judkoff 2, Michael Kummert 3, Ralph Muehleisen 4, John Allison 5, J. An 6, J. Glazer 7, R. Henninger 7, M. Hiller 8 , Y. Jiang 9 , A. Johannsen 10 , N. Kruis 11, T. McDowell 12, E. Ono 13 , P. Strachan 14, M. Witte 7, D. Yan 15, H. Yoshida 16
1 J. Neymark & Associates, United States of America
2 National Renewable Energy Laboratory, United States of America
3 Polytechnique Montréal, Canada
4 Argonne National Laboratory, United States of America
5 arbnco Ltd, United Kingdom
6 Beijing University of Civil Engineering and Architecture, China
7 GARD Analytics, Inc., United States
8 Transsolar Energietechnik GmbH, Germany
9 Southeast University, China
10 Alec Johannsen Consulting Engineers, South Africa
11 Big Ladder Software, United States
12 Thermal Energy System Specialists, United States
13 National University of Singapore, Singapore
14 University of Strathclyde, United Kingdom
15 Tsinghua University, China
16 Kyoto University (professor emeritus), Japan

Abstract: ANSI/ASHRAE Standard 140, Standard Method of Test for the Evaluation of Building Energy Analysis Computer Programs, is widely cited for evaluating software for use with performance-path energy efficiency analysis in conjunction with well-known energy-efficiency standards, including: ASHRAE Standard 90.1, the International Energy Conservation Code, and other international standards. The BESTEST (Building Energy Simulation Test) thermal fabric tests, originally published in 1995, comprise a portion of Standard 140. These are program-to-program comparative tests, where to assess model accuracy a tested program’s results are compared with the range of agreement of the results of other programs that are typically a set of vetted example results provided with Standard 140. This paper summarizes the work to update and adapt the building thermal fabric test cases to the current modeling state of the art. The original test specifications were extensively revised and then field tested with a variety of internationally developed simulation programs with time steps of one hour or less. The work resulted in a narrower range of agreement among the test suite example simulation results, where the narrowing may be attributable to less ambiguity in the test specification and improvements to building performance simulation software since 1995. The completed test suite has been integrated into ANSI/ASHRAE Standard 140.
Keywords: BESTEST, validation, building thermal fabric
Pages: 1490 - 1497