I’m not sure that you can do this calculation with any reliable accuracy. There are several formulas for pool water evaporation, some of which include potential wind effects, but this is only part of your load. Some of the formulas are based on operational experience for indoor pools by equipment manufacturer’s specifically for their product performance. The pool water is also loosing heat to the ground at some not well defined rate. I had one pool that was into ground water and had an underground flow increasing heat loss. As an outdoor pool, is it year round or shut down, there will be ground heat storage losses. The solar gains for pool water are also not well established. Typical pool water heaters are not sized to an operational load, but rather to a startup load. That is, if you refill your pool with fresh 50F water, how long do you want to wait to get the water to a set point of 80F (or whatever). Seems like you could calculate with what you have and put at least 50% error margin on it.
Ned Lyon, P.E. (MA)
Staff Consultant
SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9350 direct
781.907.9009 fax
www.sgh.com
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of jvd2pe
Sent: Tuesday, November 29, 2011 2:17 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
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