New ASHP installed and just had its first test

Leif

Cardew wrote: »

The best way to look at it is as a 'reverse fridge'.

With a fridge, or air conditioning, it extracts the heat from the interior of the fridge(or house with Aircon) and blows out that heat out as warm air.

The First law of Thermodynamics applies here, - you cannot create or destroy energy. Any heat extracted from the outside air is eventually released. So if you extract, xxxBTu(or kWh) from outside, your house loses exactly that amount of energy.

Indeed, but in practice the heat extracted from the air outside will escape through the roof and walls, heat surrounding air and rise. The cold air expelled from the unit will stay at ground level, and slowly reach thermal equilibrium with the surrounding air.

Leif

Geotherm wrote: »

They would not even realise

Okay thanks. Obviously it is not huge amounts of freezing cold air being discharged directly at a neighbour's front door then.

dullnote

Hi it's great to read all the technical reasons why this works, but lets get this into real term. I must design a unit to sit in front of the outside unit, where the cold air is expelled. The unit must be sized to hold 12 bottles of beer, this would then be chilled for nothing.

Trying my best to become greener every day

Dullnote

[Deleted User]

dullnote wrote: »

Hi it's great to read all the technical reasons why this works, but lets get this into real term. I must design a unit to sit in front of the outside unit, where the cold air is expelled. The unit must be sized to hold 12 bottles of beer, this would then be chilled for nothing.

Trying my best to become greener every day

Dullnote

Great way of chilling warm beers/wine for Friday night curry :cool:

Great looking setup BTW

dullnote

Thanks jeepjunkie, I am please with the set up if constructing from start again I would have opted for thermal store but we are where we are.

When I built the house my head was full of how do we build it and what and when do we order things. Wife and myself took 3 year to build, all except roof tiles and roughcast done by our self, mate a plumber who connected the gas in.

However happy day today just got my money for RHI put into my bank account today.

Wondering when or if the yearly payments will ever take place, if it does additional bonus if it does not happen I am still happy with the set up.

Will post running cost as things develop.

jeepjunkie do you wood burner? wife not happy we fitted a WB last year which is great to fall asleep in front off, however since the ASHP install never had the thing on.

How do other run the WB and ASHP?

TiredGeek

dullnote wrote: »

I must design a unit to sit in front of the outside unit, where the cold air is expelled. The unit must be sized to hold 12 bottles of beer, this would then be chilled for nothing.

Dullnote

Yes, it's called a crate

grahamc2003

dullnote wrote: »

Hi it's great to read all the technical reasons why this works, but lets get this into real term. I must design a unit to sit in front of the outside unit, where the cold air is expelled. The unit must be sized to hold 12 bottles of beer, this would then be chilled for nothing.

Trying my best to become greener every day

Dullnote

It's better than that. You'll not only chill it, but very likely get some fractional freezing going on, effectively turning your 5% beer into a more manly 9%, complete with quite a large inbuilt ice cube.

[Deleted User]

dullnote wrote: »

Thanks jeepjunkie, I am please with the set up if constructing from start again I would have opted for thermal store but we are where we are.

When I built the house my head was full of how do we build it and what and when do we order things. Wife and myself took 3 year to build, all except roof tiles and roughcast done by our self, mate a plumber who connected the gas in.

However happy day today just got my money for RHI put into my bank account today.

Wondering when or if the yearly payments will ever take place, if it does additional bonus if it does not happen I am still happy with the set up.

Will post running cost as things develop.

jeepjunkie do you wood burner? wife not happy we fitted a WB last year which is great to fall asleep in front off, however since the ASHP install never had the thing on.

How do other run the WB and ASHP?

Yeah we have and still run the stove. Wife likes the house very warm. In fact we are having a second stove installed in Jan though this one is mainly a design feature as in the kitchen area. They also make nice feature when hosting large parties. Trouble is the house gets so hot in conjuction with the ashp you soon find that people have opened the doors into the garden in the middle of winter :mad:

Plus being in the country we experience a couple of long power cuts every year. Some have lasted 3 days. A least with the stove the house is still has some warmth.

nande2000

Me too, we have a 4.5kw Morso Squirrel in the front room and im also in the process of filling the boiler from our old Stanley range cooker boiler full of silica sand; when its done we can use it as a room heater/cooker in the kitchen. They will definitely be needed if we get an ambient temp below -10 degc

was -4degc last night, our 8.5kw Ecodan coped perfectly.

jeepjunkie wrote: »

Yeah we have and still run the stove. Wife likes the house very warm. In fact we are having a second stove installed in Jan though this one is mainly a design feature as in the kitchen area. They also make nice feature when hosting large parties. Trouble is the house gets so hot in conjuction with the ashp you soon find that people have opened the doors into the garden in the middle of winter :mad:

Plus being in the country we experience a couple of long power cuts every year. Some have lasted 3 days. A least with the stove the house is still has some warmth.

dullnote

Yes our pump worked fine last night a -4 although the pump did run for long periods of the day but cheap compared with the LPG gas guzzler. Did think about putting stove on but wanted to see how my new toy coped.

The way thing are looking I will have over two years of wood in the store at present, never mind we are ready for any power cuts.

If it is still snowing this weekend I am sure the fire will be on, out for a nice walk, back to a warm fire, glass of port, old film on telly feet up, life can not gat any better. ( can not promise to see the end of the movie may just doze off a little)

ASHP is boring in comparison

Dullnote