I'm working the HVAC 6 min solutions, on a pool evaporation rate problem (#36), and it refers to ASHRAE for the equation used. I can't find this equation in any of my ASHRAE handbooks. Can someone point me to it?
Thanks.
I remember this problem. I think the equation is in the ASHRAE Applications Handbook. I can look when I get to my desk in a few hours. But a quick google search for "pool evaporation ASHRAE" gave me this equation:
Wp = 0.204 * A * (Pw - Pa)
where
Wp = rate of evaporation (lbm/hr)
A = pond area (ft2)
Pw = sat. pressure of pool water (psia)
Pa = sat pressure of air dew point (psia)
I'll verify from my ASHRAE book in a bit. Hope this helps!