Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The OpenStudio default chiller coefficients correspond with those published in the Title 24 Nonresidential ACM for air-cooled scroll chillers (page 2-98 here), as well as the "Minimum Efficiency Standards" appendix for California Utility incentive programs, which states the coefficients come from a California Energy Commission study.
From footnote 8 in this paper from Taylor Engineering, it appears these coefficients were first published in the first public review of ASHRAE Standard 90.1-1989 (March, 1996). However I haven't found this document to ascertain specifically how the coefficients were derived.
