RE: [EnergyPlus_Support] Re: Pools in E+

["Edward G. Lyon" <eglyon@xxxxxxx>]

I’m not sure what your original purpose was.� If you are trying to look at energy use, there are too many variables to account for.� If you are trying to size a pool water heater, you are using the wrong procedure.� Pool water heaters are typically sized by how long it takes to heat up the pool water to operating temperature.� Say you fill the pool with 50 deg-F water and you want 85 def-f water to swim in, you select a heater that will do the job in an acceptable period of time, say two days or less.� Maintaining temperature typically takes a lot less energy, so the heater should be large enough.� That said, I have seen a pool at a ski resort where the pool water was both inside and outside a building�

>�

Ned Lyon, P.E. (MA, WV)
Staff Consultant

SIMPSON GUMPERTZ & HEGER
781.907.9000�main
781.907.9350 direct�
617.285.2162 mobile�
781.907.9009�fax
www.sgh.com



From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Chien Si Harriman
Sent: Tuesday, July 16, 2013 10:44 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Re: Pools in E+





That is way more than two cents worth Rui!



I ended up finding a research paper funded by the DoE that claims the ASHRAE equation overestimates evaporation loss by about 25%. They only had one experimental data set to make this claim though.�



My general feeling after doing all the research was that you just have to find a model and go with it. So many variables to predict, the best we can do is make the closest prediction of these variable estimates and go.�