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Thread: Which colour liner for best heat collection in the water?

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    Which colour liner for best heat collection in the water?

    Just pondering....;

    Which is the best colour liner for putting the sun's heat into an outside pool?

    I have two thoughts;
    Black absorbs the most light and sun - does this mean that the water does not get hot because the liner has absorbed it?
    Cream coloured - does this reflect the heat back into the water?
    Or is it the other way around?

    I'm sure there's a clever person out there who has the answer...
    SWG - Exterior
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    JasonLion's Avatar
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    Re: Which colour liner for best heat collection in the water

    Darker liners keep the water warmer. Lighter colors reflect more light back out of the pool.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Which colour liner for best heat collection in the water

    aha...but here's another thought for the day;

    Black clothes absorb more sunlight and heat radiated from the body than white clothes. However,if they are loose-fitting, and there is wind, the wind convects the heat away faster than it is absorbed. White clothing reflects sunlight, but also reflects internal heat back towards your body, so the net effect under identical conditions is less cooling than with black clothes.....

    QED if you have a black liner it will hold the heat, but not disperse it to the water, but a white liner will reflect the heat straight back into the water = warmer water.....

    ????
    SWG - Exterior
    12x5M
    90,000 Ltrs /24,000US gallons
    Pool Pilot Digital
    Hayward Max Flo VS
    Polaris 280
    Vinyl liner
    Sand Filter

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    JasonLion's Avatar
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    Re: Which colour liner for best heat collection in the water

    Thermal transfer between the liner and the water is extremely efficient, totally unlike the clothing situation where there is an insulating air gap.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    dmanb2b's Avatar
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    Re: Which colour liner for best heat collection in the water

    Yup ...also you may strongly consider a dark blue liner vs. black. I believe (may be mistaken) but depth perception is a big issue in black liner pool. I guess that's only a concern if it is a diving pool though
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    tgmb's Avatar
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    Re: Which colour liner for best heat collection in the water

    Richard,
    I switched from a very light, almost white plaster to a dark Mediterranean blue, and my average unheated temp rose about 5 degrees F. Tom
    20k gal. 36' In ground Med. Blue plaster, two-speed EcoPump EP6, Pentair 3.14 sq. Ft. Sand w/zeosand, Spectralight SL 500, RayPak 2100 heater, Polaris 360,GE Timer 15087, Borates 80 ppm.

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    Re: Which colour liner for best heat collection in the water

    Tom,

    it seems that you have the "proof in the pudding" as it were....

    thanks everyone.
    SWG - Exterior
    12x5M
    90,000 Ltrs /24,000US gallons
    Pool Pilot Digital
    Hayward Max Flo VS
    Polaris 280
    Vinyl liner
    Sand Filter

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