Evaporated tubes with a PV-powered pump

    • 2018-10-03 at 00:03 #22871 Reply

      Neil
      Guest

      Hi,
      Assuming my hot water tank heating coil is above the height of my tubes and the coil is suitable for gravity use, is it possible or advisable to gravity feed in this way instead of using a pump and the running cost that go with it?

      Any alternatives ideas would be appreciated.

      Neil

    • 2018-10-03 at 08:38 #22872 Reply

      Stuart Lovatt
      Keymaster

      Hi Neil

      No, sorry that wouldn’t work.

      A fantastic way of powering a solar heating system without using mains electricity is a PV-powered pump.

      This has been used to great effect, and with the added benefit of the pump only engaging when enough sunshine to heat the solar tubes is hitting the PV panel too.

      I’ve seen this used to great effect with a flat-plate system and will work with tubes too. However, I haven’t seen how they fix the PV to the tube system, so you’ll have to engineer a solution. Here is an example:

      http://www.discreteheat.com/thermatwin/products-and-information/what-is-thermatwin.aspx




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