Forum discussion
Schools-2009 EAp2: Minimum Energy Performance
I am using HAP to model a system consisting of water-source heat pumps. I am required to input the ARI/ISO efficiency. My problem is that the heat pumps are two-stage and have both full and part load efficiencies associated with them while HAP only allows one input. Most of the time the heat pumps will be running at part-load, so, would it be acceptable to use an average of the full/part time efficiencies? Has anyone else run across a similar situation?
Thanks.
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
March 9, 2012 - 9:47 am
You should seek a published work around to justify the modeling procedure. Perhaps HAP technical support can help. You could also try the HAP User's Group at onebuilding.org.