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    • 15 September 2012 at 9:45 pm #31736
      Darren Archer
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        Thermodynamic heating system, really as god as they say?, I've searched long and hard on the web but can find very little real information or articles on these systems. Does anyone know of an systems that have been installed or any articles on them?

      • 23 September 2012 at 6:48 pm #38681
        Greengauge
        Participant

          Aren't all heating systems thermodynamic?!

          I assume you're referring to the Heat pump systems employing a solar collector as the evaporator. As far as I can tell, these offer all of the disadvantages of ASHP's and solar thermal, with none of the benefits. The evaporator is poorly optimised for absorbing heat from the air, so doesn't work well when there's no sun, when the radiant sky temperature is low. When it is sunny, then your conventional solar thermal is probably a better bet for DHW, and if your passive design is half decent you won't need much heat anyway…

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