Secondary Author(s)
Parker, Danny; Huang, Yu Joe
Report Number
FSEC-PF-409-00
URL
http://publications.energyresearch.ucf.edu/wp-content/uploads/2018/06/FSEC-PF-409-00.pdf
Keywords
HVAC; Energy Efficiency; Humidity; Buildings, DOE-2; RESYS routine; Part load performance; Air conditioning systems; Energy simulations; Humidity predictions; System efficiency; Moisture capacitance
Abstract
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.
Date Published
8-31-2000
Identifiers
626
Subjects
Air conditioning; Energy consumption; Buildings--Energy conservation; Humidity--Control; Computer simulation; Computer software
Local Subjects
Buildings - Energy Efficiency; Humidity; Buildings - HVAC
Type
Text; Document
Collection
FSEC Energy Research Center® Collection
STARS Citation
Florida Solar Energy Center and Henderson, Jr., Hugh, "Improving DOE-2's RESYS Routine: User Defined Functions to Provide More Accurate Part Load Energy Use and Humidity Predictions" (2000). FSEC Energy Research Center®. 626.
https://stars.library.ucf.edu/fsec/626
Included in
Rights Statement
Notes
Reference Publication: Henderson, H., Parker, D., Huang, Y., "Improving DOE2's RESYS routine: User Defined Functions to Provide More Accurate Part Load Energy Use and Humidity Predictions", Proceedings of 2000 Summer Study on Energy Efficiency in Buildings, American Council for an Energy-Efficient Economy, 1001 Connecticut Avenue, Washington, DC., August 2000.