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Thread: geothermal

  1. #1
    Join Date
    Mar 2010
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    Default geothermal

    I am researching geothermal furnaces and have a question. Could solar be used to elevate water for use in a geothermal furnace? Solar panels are so much less costly than digging or drilling. I realize that it would be supplemental to my standard furnace, but solar cost less then trenching or drilling. How warm or hot can water be for a geothermal furnace. How much water is pump in gallons per minute?

  2. #2
    Join Date
    Jun 2007
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    Fayette County, Ohio
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    Default Re: geothermal

    Quote Originally Posted by dave bishop View Post
    I am researching geothermal furnaces and have a question. Could solar be used to elevate water for use in a geothermal furnace? Solar panels are so much less costly than digging or drilling. I realize that it would be supplemental to my standard furnace, but solar cost less then trenching or drilling. How warm or hot can water be for a geothermal furnace. How much water is pump in gallons per minute?
    Most geothermal units are heat pumps designed for heating and cooling. They are designed to use a constant water supply at about 50 degrees to transfer heat from and to for conditioning the air. With proper trenches or drilled wells the water temp will change little regardless of the outside temperature or amount of sun. Solar only works when there is sun so it will not work at night, is less efficient on cloudy days etc.

    Will it work, probably, but most likely not worth the investment.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  3. #3
    Join Date
    Jul 2009
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    Northeast
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    Default Re: geothermal

    If you go Geothermal you still have to dig ditches and a well, and yes Solar could be used to pump the water out of the well, but you also will need batteries to store the Electricity. As Jack said "the sun isn't out at night", so I doubt it would be cost effective unless you did a whole house Solar Array and sold electricity that is not used back to the Utility Co. You should research well as to what type and the manufacturer of the Panels that you use. They really aren't that efficient but some are better then others, if I could afford it I would also do Geothermal with Solar. Don't be fooled, Solar is not Cheap. Follow the links for more info.


    http://www.power4home.com/index.php?hop=ttinc1
    http://www.73.com/a/0108.shtml
    Last edited by Sten; 03-07-2010 at 10:12 AM. Reason: more info

  4. #4
    Join Date
    Nov 2008
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    25

    Default Re: geothermal

    I just put in a geothermal system and am very happy with it. My house has never been so warm and cosy, and my heating cost dropped about $5000 now that I am off oil. From what I have learned at websites like www.geoexchange.org and www.greenbuildingtalk.com what you are suggesting will not work. It sounds more like you are thinking about a radiant heat system that would get some heat from a solar set up, not a geothermal system. The second website might be where you would find answers.

    Geothermal gets its heat not from the sun, but from the earth through either open wells or closed loops. It uses very low temperaures, not hot ones. My water enters my house at 44.9 and leaves at 39, the furnace removes the difference and uses it to create eiter heat or cool air depending on my needs. Go to some geothermal manufacturers websites to learn how its done: Florida Heat Pump, WaterFurnace, Climatemaster Or to: http://www.consumerenergycenter.org/...eothermal.html

    Geothermal is not a do it yourself project, but it is a wonderful clean technology. Plus, thanks to the Stimulus Package there is 30% tax credit to help make the systems more affordable and to give the industry a boost.
    Last edited by Sunny H; 03-26-2010 at 12:01 PM.

  5. #5
    Join Date
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    Northeast
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    661

    Default Re: geothermal

    I think the OP was asking about using Solar for electricity to power the System and or pumps.

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