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Calculating Energy and Demand Retrofit Savings for Stroman High School: Interim Report
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Date
1992
Journal Title
Journal ISSN
Volume Title
Publisher
Energy Systems Laboratory (http://esl.tamu.edu), Texas A&M University
Department of Mechanical Engineering, Texas A&M University
Department of Mechanical Engineering, Texas A&M University
Abstract
As part of the LoanSTAR program, Stroman High School in Victoria Texas underwent
two retrofits: a) an absorption chiller was changed to an electric vapor compression
chiller, and b) an EMCS system was installed after about 5 months in the post retrofit
period. Moreover, retrofit savings calculation was complex since pre-retrofit data
consisted only of monthly utility data while hourly monitored data are available for the
post-retrofit period. The retrofit savings in electricity and gas were computed by two
different approaches: Unnormalized Utility Bill Comparison and Weather and Schedule
Normalized Utility Bill Comparison Using Post-Retrofit Daily Models. (For purpose of
simplicity, in this report, we will refer them as Level-0 and Level-1, respectively.) This
report describes these approaches and discusses how well the retrofit savings predicted by
both approaches compare with each other. It also describes the procedure for determining
demand savings.
Description
Keywords
LoanSTAR, EMCS, retrofit savings