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Assessment and Suggestions to Improve the Commercial Building Module of EIA-NEMS
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The National Energy Modeling System (NEMS) is a comprehensive, computer-based, energy-economy modeling system developed and maintained by the Department of Energy's Energy Information Administration (EIA). NEMS forecasts the national production, imports, conversion, consumption, and prices of energy out to 2015, subject to macroeconomic assumptions, world energy markets, resource availability and costs, technological developments, and behavioral and technological choice criteria. NEMS has nine program modules of which the Commercial Sector Demand (CSD) module is one. Currently the CSD module uses a matrix of Energy Use Intensities (EUls) gleaned from the 1989 CBECS database to model service demand per major fuel type for eight different geographic census divisions and eleven different building types.
DescriptionOver the last 7 years, the Energy Systems Laboratory (ESL) of Texas A&M University built up an extensive database of monitored hourly energy use data in about 150 institutional, hospital and state and governmental buildings as a part of the LoanSTAR energy monitoring program. Further, the ESL has acquired expertise in commercial buildings simulations as well as in related technology improvements. This study included two tasks. First, the NEMS CSD-EUI matrix data for the Texas region was compared to those determined from end-use monitored data from the Texas LoanSTAR database. Second, the interaction effects between lighting and heating and cooling energy use for seven different building categories in three different geographic locations were characterized using the ASEAM building simulation software.
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O'Neal, D. L.; Reddy, T. A.; Sucher, B. (1996). Assessment and Suggestions to Improve the Commercial Building Module of EIA-NEMS. Energy Systems Laboratory (http://esl.tamu.edu), Texas A&M University; Department of Mechanical Engineering, Texas A&M University. Available electronically from