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Master Plan and Energy Audits at a Large Texas Medical Campus
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Energy Engineering Associates, Inc. was engaged by the Facilities Resource Management Department at a large medical center in Houston, TX to assist with the development of an Energy Management Master Plan and subsequent individual Detailed Building Energy Audits. The Master Plan summarized our methodology for disaggregation of historical energy use by building and end use. We also defined our proposed system for prioritizing buildings for the individual Detailed Building Energy Audits. We proposed a 5-year plan of action to complete detailed audits of existing building inventory and complete energy efficiency retrofit projects to achieve 32 percent reduction in total energy use. The Master Plan called for maximizing incentive payments from the local electric service provider, and for targeting the maximum available funds over the 5-year period. To maximize the return on investment in energy efficiency, the manpower and financial resources were targeted toward the best projects. EEA developed a strategy to assess the current performance of the buildings by evaluating historical utility consumption and building infrastructure data. The energy efficiency targets or benchmarks were established for each building based upon relevant variables. Finally, an analysis of the current performance versus targeted performance was made to define the gap between current usage and targeted efficiency level. Baseline energy consumption models were developed for most of the buildings based upon the HVAC system type installed in the facility. The “Bin Temperature” model calculated the cooling and heating requirements for the buildings based upon local Houston weather data and operating schedule assumptions for lighting and internal loads. The assumptions for internal loads and lighting were calibrated with short term building sub-meter data. Daily and weekly schedule assumptions were verified and total internal loads defined by the meter information. The types of energy savings projects were categorized into the following six groups: 1. Hot Deck Fans 2. Heat Recovery 3. Variable Ventilation 4. Central Plant Projects 5. Commissioning and Controls 6. Lighting Projects
SubjectEnergy Management Master Plan
Detailed Building Energy Audits
Energy Efficiency Performance Evaluation
Energy Saving Projects
Simpson, K.; Stinson, M.; Haag, S.; Hart, M. (2009). Master Plan and Energy Audits at a Large Texas Medical Campus. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from
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