Homeowners will have to turn down radiators by 10C if Britain is to hit climate change targets | Daily Mail Online
Z.
What the PM wants: No more gas boilers in new builds from 2023, and 600,000 heat pumps installed a year
How much it will cost: £500million of taxpayers' cash on new hydrogen tech
Air-source heating systems extracts heat from the outside air, working in the opposite way to a fridge which extracts heat from the inside.
The process is so efficient that it can absorb heat from the air even when the temperature drops to below -30C.
The heat from the air is absorbed into a fluid, which then passes through a compressor where the temperature is increased to heat the home.
It is considered to be a more efficient and environmentally friendly method of heating as the heat that is being mined is renewed naturally over time.
It also requires less electricity to run, meaning it can be easily powered by solar panels.
There are several downsides to an air-source heating system, however.
They are noisy, similar to an air conditioner, and require larger radiators to heat the home effectively.
Underfloor heating is the most efficient means, which can prove costly, and the system requires a well-insulated home.
Ha, ha, ha ,ha ,ha, ha, ha haaaaaaaaaaaaaaaah choke!?
Z.
ebee:
go and live in a warmer climate might be more cost effective/enviro friendly
No, you still need the heat pumps, but run them the other way around.
If underfloor heating becomes widespread, it will certainly affect what we do. No more lifting floorboards, and ceilings down for new circuits!
On the plus side, knees will be preserved longer, although perhaps at the expense of arthritic necks.
It really is time that the Government took some advice from Engineers. All of these "everything electric" plans are completely unworkable without the replacement of the entire electrical distribution system and 10 new nuclear power stations. The cost £3 trillion. By 2030, you have to be having another laugh at the public. Air source heat pumps sound ok on paper until you understand the specification. With air at -10C (not unusual in Britain) and 50C outlet temperature they perhaps give 2 times the heat available from electricity directly. The electricity costs 4 times as much as gas, guess what, you pay twice as much money to run a complex system which is expensive to maintain! The article above is Green rubbish, no truth whatsoever. As for Hydrogen, forget that, it needs twice the electricity to make it as the heat from burning it. Simple chemistry, not understood by the new "Green" Government.
David CEng etc (Thats a real Engineer by the way!)
I got another Engineers reply
@David Stone
As another real Engineer I completely agree. Unfortunately the entire government is technically and scientifically illiterate, something that ministers actually seems to revel in. They like to say that they are led by the science but that is simply not true. They are led by dogma. Having "green" taxed electricity to the point where it is uneconomical for high power applications such as heating and transport they now want to mandate it as the only energy source that is "green", which, of course, it is not.
It is not just the Mail!
davezawadi (David Stone):
Redback spiders are lethal too.
Back to heat pumps. I posted this in the Telegraph in response to a turning down the radiators article.It really is time that the Government took some advice from Engineers. All of these "everything electric" plans are completely unworkable without the replacement of the entire electrical distribution system and 10 new nuclear power stations. The cost £3 trillion. By 2030, you have to be having another laugh at the public. Air source heat pumps sound ok on paper until you understand the specification. With air at -10C (not unusual in Britain) and 50C outlet temperature they perhaps give 2 times the heat available from electricity directly. The electricity costs 4 times as much as gas, guess what, you pay twice as much money to run a complex system which is expensive to maintain! The article above is Green rubbish, no truth whatsoever. As for Hydrogen, forget that, it needs twice the electricity to make it as the heat from burning it. Simple chemistry, not understood by the new "Green" Government.
David CEng etc (Thats a real Engineer by the way!)
If you want to get decent efficiency out of a heat pump, then 50C output temperature is far too high. Try fitting bigger radiators, and turning it down to the mid 30's.
For new builds, a ground source heat pump would be much better, but they don't make for an easy retro-fit.
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