Improving DOE-2's RESYS routine: User defined functions to provide more accurate part load energy use and humidity predictions

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In hourly energy simulations, it is important to properly predict the performance of air conditioning systems over a range of full and part load operating conditions. An important component of these calculations is to properly consider the performance of the cycling air conditioner and how it interacts with the building. This paper presents improved approaches to properly account for the part load performance of residential and light commercial air conditioning systems in DOE-2. First, more accurate correlations are given to predict the degradation of system efficiency at part load conditions. In addition, a user-defined function for RESYS is developed that ... continued below

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Henderson, Hugh I.; Parker, Danny & Huang, Yu J. August 4, 2000.

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In hourly energy simulations, it is important to properly predict the performance of air conditioning systems over a range of full and part load operating conditions. An important component of these calculations is to properly consider the performance of the cycling air conditioner and how it interacts with the building. This paper presents improved approaches to properly account for the part load performance of residential and light commercial air conditioning systems in DOE-2. First, more accurate correlations are given to predict the degradation of system efficiency at part load conditions. In addition, a user-defined function for RESYS is developed that provides improved predictions of air conditioner sensible and latent capacity at part load conditions. The user function also provides more accurate predictions of space humidity by adding ''lumped'' moisture capacitance into the calculations. The improved cooling coil model and the addition of moisture capacitance predicts humidity swings that are more representative of the performance observed in real buildings.

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  • 2000 ACEEE Summer Study on Energy Efficiency in Buildings, Pacific Grove, CA, August 20-25, 2000

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  • Report No.: LBNL--46304
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 842657
  • Archival Resource Key: ark:/67531/metadc787590

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • August 4, 2000

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 4, 2016, 3:21 p.m.

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Henderson, Hugh I.; Parker, Danny & Huang, Yu J. Improving DOE-2's RESYS routine: User defined functions to provide more accurate part load energy use and humidity predictions, article, August 4, 2000; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc787590/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.