Sunday, 22 July 2018

A 19th-century solution helps cut carbon emissions

quote [ The world spends about 15% of its energy on heat. Most of that comes from burning fossil fuels in homes and businesses. A solution to the problem is the heat pump, powered by electricity, A heat pump is a refrigerator, but in reverse. Physics dictates that when gases are compressed, they release heat. The heat from the condenser is directed into the house and the evaporator absorbs heat from the outside. It produces three units of heat for every unit of electricity consumed. (Electric heaters can, at best, produce one unit of heat for every unit of electricity.) The use of these devices has helped the EU cut its carbon emissions by 30 million metric tons annually (about 1% of the total), ]

Mankind continuing to try to survive.
[SFW] [environment & nature] [+2]
[by yunnaf@1:12pmGMT]


thepublicone said @ 2:13pm GMT on 22nd Jul
Heat pumps have been a staple in Eastern Canada for decades, and are used to cut down on the power bills (most homes out here are oil or electric, and the price climbs quick). It's cool that they have this side-benefit.
cb361 said[1] @ 6:18pm GMT on 22nd Jul
Correct me if I'm wrong, but surely these devices would be most efficient when it's very hot outside the house, and less efficient (or even ineffective) when it's cold outside, which is undesirable way around. The heatsink (coldsink?) outside can only gather heat if it the uncompressed gases make it colder than the ambient temperature, which becomes harder as the temperature drops.
milkman666 said @ 6:55pm GMT on 22nd Jul

Apparently it still represents a savings even in areas hit hard with cold weather. Worse comes to worse you end up utilizing another heat source in tandem.
thepublicone said @ 9:05pm GMT on 22nd Jul
The 40% savings claim is pure and utter bullshit- we have one; its closer to 10-15%- but the milkman's link pretty well sums it up.
Jack Blue said @ 10:25am GMT on 23rd Jul
In sweden they are common in the south and almost nonexisting in the north.
the circus said @ 1:03am GMT on 23rd Jul
Hmm, if electricity vs fossil fuels really are starting to equal, could this be a better use of solar energy (at least in winter), heating the cold parts of heat pumps? How about geothermal in reverse? Suck the heat out of the ground, if that makes sense. And since both this and AC are ultimately mechanically driven, could household VAWTs and a flywheel allow partial energy independence for heating and cooling?
Ankylosaur said @ 11:04am GMT on 23rd Jul
ethanos said @ 8:49pm GMT on 24th Jul
The technical term, I think, is variable refrigerant flow (VRF) and it can be reversed to heat or cool. Mitsubishi is kind of the go-to company here in New England; their system is called City-Multi (those japanese). It is highly efficient. It is not resistance-heating like old electric units were. As I understand it, you CAN combine it with a coil loop into the ground for geothermal boosting, but that will likely add costs to your off-the-shelf systems.
Fish said @ 2:11pm GMT on 22nd Jul [Score:-5 Boring]
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