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Re: [Strawbale] Re: Strawbale Digest, Vol 4, Issue 9

Sounds like an air source heat pump - in terms of carbon emissions, whether this is a good idea depends on the source of your electricity (bad idea if from fossil fuels, potentially a good idea if from renewables). Here in Canada, ground source heat pumps - more reliable and efficient than air source, but more expensive to install - are becoming quite trendy. On both sides of the Atlantic (in the English-speaking bits) they are, confusingly, marketed as geothermal heat pumps (a misuse of the term in my professional opinion...). The same caution applies for these as for air source re carbon emissions, but the British electrical generation mix (and I imagine the Irish mix isn't that much different now) is now such that they perform better than condensing natural gas boilers in terms of emissions per kilowatt output. If you were to send me some info on the building design and heating (+ electrical) requirements, Simon, I could calculate for you the approximate size of wind turbine you would need. (But be warned: you might be surprised how big it would need to be. You might want to think about ways of minimising heat consumption first.) 
atb,
Mark
Borden, Saskatchewan


Simon Blackbourn wrote:


Hi Harald
I'm very interested in the heating system you mention, but the potential project is a very low budget one - so can you tell me if this was an expensive and/or complex system to install?
And do you think it could be powered by a small windmill? The house will be in a very windy location - the extreme south west tip of Ireland! 

Best Wishes
Simon
On 18/01/06, *avantgarden@wxs... <mailto:avantgarden@wxs...>* <avantgarden@wxs... <mailto:avantgarden@wxs...>> wrote: 

    ..... the remarkable thing about is the heating system.
    The house is standing in a rather shady situation, sad enough, solar
    systems cannot be applied for heating. Instead electricity is used to
    extract warmth from the outside air and sending this warmth via water
    through pipes. Those heat up the loam stucco inside the house. Who
    knows
    the english term for Luftwärmepumpe, I guess its not airwarmthpump;-)
    The bad thing about it is, that it needs electricity for this process.
    The good news is: It needs very little maintanance and consumes
    little
    electricity. Last week I noticed a weekly average of 25 KW per day
    keeping the house temperature at 20 C° whith an average outside
    temperature of -3 C°.....


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