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Thread: Formula to calculate expected Pool Water Temperature???

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  1. 05-11-2007 04:57 PM #1
    TheG$
    TheG$ is offline --General User-- TheG$ 0
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    Default Formula to calculate expected Pool Water Temperature???

    Does anyone know the formula to calculate the expected Pool Water Temperature (approximately of course)?

    Specifically, assume the following inputs. I am not sure which of them are actually pertinent, but I assume someone has a simple formula for forecasting a "unheated, uncovered pool" expected temperature if you know the following pieces of information.
    • Overnight Low Air Temp
    • Daily High Air Temp
    • Relative Humidity
    • Size of Pool in gallons (probably not needed)
    • Average Depth
    • Surface Area (probably not needed)
    EXAMPLE (not real data!): My pool is 9000 gallons, 4 feet deep, with a 370 sf surface area. The daily high for the next five days will be (f) 97, 99, 100, 96, 98. The overnight low will be 65, 69, 68, 66, 66. The magic formula predicts in 5 days the water temp will be .... 77 degrees.

    Anybody have any guesses?
    Last edited by TheG$; 05-11-2007 at 05:03 PM.
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