RECONCILING DIFFERENCES BETWEEN RESIDENTIAL DX COOLING MODELS IN DOE-2 AND ENERGYPLUS
The models used to simulate direct expansion (DX) cooling units in DOE-2 and EnergyPlus are fundamen- tally different. Though EnergyPlus was adapted from DOE-2, changes have been made to theDXcooling model to root the model in a more analytical technique. In con- trast, DOE-2 uses an almost completely empirical curve fit method to estimate performance at off-rated conditions. This paper describes both models and explains howinputs can be generated in DOE-2 for consistency with the model in EnergyPlus. An example DX cooling unit has been characterized with full performance mapping and trans- lated into EnergyPlus inputs to compare outputs against a near-equivalent DOE-2 model with the inputs defined in this paper. Simulating thisDXunit in DOE-2 and Energy- Plus models shows good agreement in latent and sensible performance and power consumption.
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