A couple of weeks ago, upon responding to a post by Maxime, I attached a spreadsheet that was intended to help calculate pool evaporation. I have since cleaned it up quite a bit, updated the formulae to the most recent versions by Mirza Shah, and checked it fairly thoroughly. My great thanks go to Mr. Shah, who graciously and patiently offered guidance and input about his formulae.
· Incorporates AHRAE-based psychrometric custom functions that you may find helpful for other purposes. They calculate both in SI and IP units. Thanks to Eric Kozubal of NREL for the original functions! (Eric, I found some small errors and have corrected them.)
· Calculates evaporation for two pools (e.g., a swimming pool and a spa pool)
o Occupied and unoccupied evaporation is shown for the indoor pools
o Occupied and unoccupied evaporation is shown for outdoor pools based on TMY data. The result is a column of fractions which represent the percentage of evaporation compared to the maximum value.
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Attachment not found: d:\eudora\attach\TMY-based Hourly Pool Evap Data 13-0705.xlsb