A strange heatpump. The ice stick

Hansson Posted By Hansson, Jun 4, 2010 at 9:57 AM

  1. Hansson

    Hansson
    Feeling the Heat 2.
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    Jul 2, 2008
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    Loc:
    Sweden,Leksand
  2. jebatty

    jebatty
    Minister of Fire 2.
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    Jan 1, 2008
    5,289
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    Loc:
    Northern MN
    You do have a sense of humor to call this cool -- looked at the last page of the pdf brochure on the link. Is the important part the need to place the Ice Stick in a location warm enough to melt the ice? If so, can this really provide heat when outside temperatures are below 0C?
     
  3. begreen

    begreen
    Mooderator 2.
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    Staff Member

    Nov 18, 2005
    63,657
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    Loc:
    South Puget Sound, WA
    Heat pumps dramatically lose efficiency at some point below freezing. They are designed to carry >50% of the heating load, not all of it. The cut off point is determined by the efficiency of the unit and refrigerant. I have read about some units able to work down to 10 degrees. Ours is a conventional high-efficiency, 2 stage design and works until about 24 degrees. We rarely see these temps for more than a week or two, so it is pretty good for our climate. Balanced with wood burning in the coldest part of winter, it has been a cost effective heating solution for us. In colder climates, if the goal is year round heating, a ground source heat pump is required.
     

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