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Energy Savings Assessment for the Robert E. Johnson State Office Building in Austin, Texas
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U.S. businesses and institutions spend an estimated $175 billion per year for energy. Of that, the fraction under performance contracts and energy service agreements is currently growing, aided by cheaper monitoring technology and integration with EMCS systems. Energy simulation programs are used both for estimating potential savings as well as to help verify savings from retrofits actually installed. The potential accuracy afforded by today's energy simulation programs is high. Yet the reliability of the results is frequently compromised by a lack of certainty that the simulations reflect actual conditions. Although there is little documentation on current methods to verify energy savings in buildings, the International Performance Measurement and Verification Protocol (IPMVP), developed by the Department of Energy (DOE), provides best practice techniques available for verifying results of energy efficiency, water efficiency, and renewable energy projects. This paper presents a method for verifying the energy savings of a newly constructed building using a baseline simulation model calibrated to the measured whole-building energy consumption to determined the independent and combined effect of the stated efficient components installed in the building. In this paper the results show that the energy savings resulting from the new design reduced the energy use by 46% when compared to similar state office buildings.
Sylvester, K. E.; Haberl, J. S.; Song, S.; Turner, W. D. (2002). Energy Savings Assessment for the Robert E. Johnson State Office Building in Austin, Texas. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from