Renewable Energy and Sustainability Forum
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Anyone wishing to register as a new member on the forum is strongly recommended to use a "proper" email address. Following continuous spam/hack attempts on the forum, "disposable" email addresses like Gmail, Yahoo and Hotmail tend to be viewed with suspicion, and the application rejected if there is any doubt whatsoever
Recent Articles: Navitron Partners With Solax to Help Create A More Sustainable Future | Navitron Calls for Increased Carbon Footprint Reduction In Light of Earth Overshoot Day | A plea from The David School - Issue 18
   Home   Help Search Login Register  
Pages: [1]   Go Down
Author Topic: heat pumps - air recovery  (Read 2096 times)
Hero Member
Offline Offline

Posts: 530

« on: November 03, 2006, 05:53:45 PM »

Anyone seen this?

heat recovery from the air


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.
« 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.

Offline Offline

Posts: 47

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

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!

Pages: [1]   Go Up
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
SMFAds for Free Forums
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!