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A/C also uses battery, but heat uses more energy. I can't speak for all cars, but mine uses a heat pump for heat. Should have similar efficiency to A/C as that
by goodcanadian 8y ago
A/C also uses battery, but heat uses more energy.
I can't speak for all cars, but mine uses a heat pump for heat. Should have similar efficiency to A/C as that is exactly what a heat pump is.
- Scoundreller 8y agoTheir efficiency goes way down the colder it gets. They’ll work well at 5-10C, but frost up and require electrically-expensive defrost cycles when it’s colder than -2 or -3 C.
- tigershark 8y agoHeat pump with outside temperatures below zero has same or lower efficiency than resistive heating.
- Faaak 8y agoI suppose the cars heats resistively below zero, and with a heat pump above
- g8oz 8y agoA modern heat pump with a variable speed compressor can be more efficient than resistive heat down to about -25 degrees Celsius (-13F). See Mitsubishi's Mr. Slim series. http://cdn.agilitycms.com/mesca/productdownloads/mem-201806-e-p-series.pdf http://cdn.agilitycms.com/mesca/productdownloads/mem-201806-... (page 13)
- tigershark 8y agoAnd if you use a ground source heat pump (that has to be interred) it would be even more efficient. So? I don’t think that you can put either of them in a car...
- g8oz 8y agoThe offerings from Mitsubishi and similar ones from other Asian manufacturers like LG and Fujitsu are air source heat pumps. I see no reason why the tech can't be scaled down to fit a car. It's certainly a reasonable goal for auto parts suppliers to aim at.