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Potential Energy Savings from Optimized Schedule and Economizer Cycles in the Moody Library at UTMB
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This report presents the results of a study which was initiated in order to estimate the potential energy savings due to optimizing the HVAC operation schedule and using economizer cycles in the Moody Library Building located at the University of Texas Medical Branch at Galveston, Texas (UTMB).
DescriptionAn optimized HVAC operation schedule was determined using an analysis involving a simplified HVAC model, which was calibrated against daily data measured by the LoanSTAR program. It is estimated that annual savings of $46,500 can be realized by optimizing the operation schedule and partially closing cold deck coils. The majority of energy savings occur because the optimized operation schedule reduces reheat substantially. Our analysis indicates that the indoor comfort level will not be degraded by this measure. The economizer cycle can reduce the annual energy costs by amount of $26,100. These two measures can reduce the annual energy costs by $71,500, or 37% of the total building energy costs. To maintain the humidity levels, the optimized schedule should be implemented by partially closed coils. It cannot be implemented by increasing cold deck temperature.
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Liu, M.; Athar, A.; Reddy, T. A.; Claridge, D. E.; Haberl, J. S. (1993). Potential Energy Savings from Optimized Schedule and Economizer Cycles in the Moody Library at UTMB. Energy Systems Laboratory (http://esl.tamu.edu), Texas A&M University; Department of Mechanical Engineering, Texas A&M University. Available electronically from