Luke
Lv 7
Luke asked in EnvironmentGreen Living · 2 months ago

Can solar energy be used to heat a home directly (not using PV cells)?

Update:

The electric heater runs up my electric bill too much.

We have solar panels on the roof but converting from sunlight to electricty to heat seems inneficient when energy is lost with each conversion. 

Could some liquid in a heat exchanger be heated during the day and then emit heat overnight?

Update 2:

I live in an area where the temperature never drops below 0° C.

6 Answers

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  • 2 months ago
    Favourite answer

    Of course Luke, there are two ways to do it. Passive solar gain is the easiest, we added south facing windows and dark hardwood floors to our cabin years ago, the sun simply warms the floor during the day and the floor releases what is stored at night. We still need a little heat overnight. 

    The second way is active solar gain. You don’t need a fluid unless you want to store tons of heat someplace overnight. Nice as that sounds it’s expensive to build and maintain. Build a glass covered box on the south side of your home about the thickness of a 2X4, insulate the back with styrofoam boards and paint the inside black. Now run a flexible 4” hose from the floor area inside to the bottom of the box and a fan from inside the top of the box that forces air through another hose back inside the house. If you want a really good setup power the fan directly with a small solar panel, then the brighter the sun shines, the hotter the box gets and the faster the fan blows, it’s self regulating. There are plans on the internet, I’ll clip one below. Take care, Rudydoo.

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  • 2 months ago

    Heating your home with an active solar energy system can significantly reduce your fuel bills in the winter. A solar heating system will also reduce the amount of air pollution and greenhouse gases that result from your use of fossil fuels for heating or generating the electricity.ontinue reading at-https://rplg.co/eac2b570

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  • Anonymous
    2 months ago

    Yeah just open the windows. 

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  • 2 months ago

    There is a limit to how much heat can be stored and recovered. While it is possible to use solar heat 70% of the time and maybe get up to 90% of the time- that last 10% is difficult. The problem is what medium is used to retain the heat and where. It does not require conversion to electricity- but it does require some use of electricity (pumps).

    Researching how to do so can be time consuming- those who have done the research often will not share it with out cost.

    Check the archives of "Mother Earth News", there are several passive systems they have published plans for which should handle keeping a house warm during the day provided there is room on the right side of the building.

    https://en.wikipedia.org/wiki/Thermal_energy_stora...

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  • 2 months ago

    anything is possible

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  • Pearl
    Lv 7
    2 months ago

    they might be able to do that

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