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Author Topic: heat pumps - air recovery  (Read 2096 times)
dinitro
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« on: November 03, 2006, 05:53:45 PM »

Anyone seen this?

heat recovery from the air

http://www.volvoxengineering.com/HeatPumps.htm

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1x 20 x 58mm panel NEE, 4x 20 x 58mm panels south, Navi-Newark 320 litre thermal store direct boiler/ rad tap by boiler, retro coil, solar coil, termovar 61, S. circuit 30m+30m flow/ return. NEE 5m flow, 5m return.  S. panel 52 degrees. NEE 45.
http://sunscribe.homeip.net
http://agni.homeip.net
Ivan
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« Reply #1 on: November 12, 2006, 04:47:10 PM »

There is no reason why you cannot use air as a source for a heatpump - but the efficiency is lower. Especially, if the unit is run for long periods, as ice can build up on the outdoor heat recovery unit. Ice being an insulator, will reduce the efficiency of the system. The thicker the ice becomes (long use, or cold weather use), the lower the effficiency of the air source heat pump. Having said that, they are a lot simpler to install.

Ivan
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« Reply #2 on: November 12, 2006, 06:32:56 PM »

Evening,
The majority of air-source HP's have an automatic 'de-frost' function, usually by going into reverse cycle for a few minutes, and so normally have to have a plumbed drain. - At least ours does!


Colin
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