Air source heat pump

br jones

Member
True, and there is plenty of coal and oil too, but the point is that we need to stop burning them.

Or do you really not understand the consequences of continuing to add extra 'new' carbon dioxide and methane to the atmosphere?
yep i do ,methane levels arent a problem ,carbon dioxide levels are lower than they have been ,you have been brainwashed
 

Frankzy

Member
Location
Jamtland, Sweden
ASHP pumps work well in countries. which do not experience the weather we do having a damp Maritime climate. Even in very much colluder countries they will work well if the the humidity is low , or they can work well if the temperature outside rarely drops below 8 degrees
They are certainly not helped by poor insuilation since the more heat they are trying to extract the faster they will freeze up. Having a low difference in the circulation refrigerant and the outside air will help but it quickly loses efficiency doing so. obviously a large. pump running a small house helps but then there will be issues with the power supply.
I am pan my second pump now and while performance in the summer is terrific, the same most certainly cannot be said in November through to February

Plenty of people up here in Sweden and Norway seem to get on perfectly well with their ASHP's though.

Scotston forgot to mention the fact that he has 4x GSHP not air source. This thread is about air source freezing up in the winter which of course ground source dosnt do in the beginning but after a few years of extracting heat from under your field the soil freezes solid and there is nothing you can do but install new ground loops elsewhere.

Ground source only freeze up if the loop is waaay too short compared to the amount of heat you expect to extract from the ground. It's not a GSHP problem, it's a trying-to-cheap-out-on-the-installation problem..
 

rogeriko

Member
In Sweden the temperature is way below freezing so the air has virtually no moisture in it. If there is no moisture there is no frost. In damp Britain we do not have the luxury of dry frozen air. In Sweden they have major problems in heated buildings because the humidity is around 20% which is very unhealthy.
 

e3120

Member
Mixed Farmer
Location
Northumberland
I read about one installer in N America 9 think it was) putting them in yards, back wall facing South. Cattle yards would be ideal I would suggest.... or too damp?
Cooling the cattle sheds would be brilliant in weather like this, but the moisture would be the killer.

However, mounted high up in the grainstore... We spend months trying to get rid of a heap of peak-of-summer heat. And it would dry it as well. Just need to drain the condensation away. You'd do well to get down to near-zero air temps, so freezing unlikely. Much better cop than outdoor... Where's the flaw?
 
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sjt01

Member
Mixed Farmer
Location
North Norfolk
Cooling the cattle sheds would be brilliant in weather like this, but the moisture would be the killer.

However mounted high up in the grainstore... We spend months trying to get rid of a heap of peak-of-summer heat. And it would dry it as well. Just need to drain the condensation away. You'd do well to get down to near-zero air temps, so freezing unlikely. Much better cop than outdoor... Where's the flaw?
Jonny Crickmore won an award for putting piping under his straw yards to harvest the heat from the yard muck. If putting in new cattle yards that would be a good place for GSHP
 

e3120

Member
Mixed Farmer
Location
Northumberland
Jonny Crickmore won an award for putting piping under his straw yards to harvest the heat from the yard muck. If putting in new cattle yards that would be a good place for GSHP
I don't like this idea, having thought about it a few times. Partly because I'm such a miser with straw that my muck is wet, cool & anerobic (unlike you I have to get liquor drained out of mine before it'll compost), but I'm also nervous about sucking energy out of the bed that ends up being replaced by ME. That 2nd point put pay to a simple idea to extract heat from borehole water as it emerged at 8 degrees, year-round.
 
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scotston

Member
Scotston forgot to mention the fact that he has 4x GSHP not air source. This thread is about air source freezing up in the winter which of course ground source dosnt do in the beginning but after a few years of extracting heat from under your field the soil freezes solid and there is nothing you can do but install new ground loops elsewhere.
4 x gshp. My house has 1 x ashp. And I manage 3x ashp locally. All work well in winter and summer. They don't freeze, they don't mind moisture in the air. They are well spec'd, well installed and, well, work. Mine is 12yrs old, all the rest are around 5yrs old.
 

Wisconsonian

Member
Trade
COP is coefficient of performance, basically an efficiency number that expresses the ratio of heat output to the electricity consumed. COP of 3 would mean you get three times the heat as you'd get from resistance heat from the same electricity. COP of less than one means you'd be better off to use resistance heat than the heat pump in those conditions.
 

Chickcatcher

Member
Mixed Farmer
Location
SG9
COP is coefficient of performance, basically an efficiency number that expresses the ratio of heat output to the electricity consumed. COP of 3 would mean you get three times the heat as you'd get from resistance heat from the same electricity. COP of less than one means you'd be better off to use resistance heat than the heat pump in those conditions.
Thank you
 

SFI - What % were you taking out of production?

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Red Tractor drops launch of green farming scheme amid anger from farmers

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As reported in Independent


quote: “Red Tractor has confirmed it is dropping plans to launch its green farming assurance standard in April“

read the TFF thread here: https://thefarmingforum.co.uk/index.php?threads/gfc-was-to-go-ahead-now-not-going-ahead.405234/
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