Seen a few posts stating how much the cold in winter reduces range. Will the heat pump in the new M3 mean that the winter range is much closer to the summer one?
Yes, but it's not free.Seems from this a heat pump negates the effects of cold weather on range?
So the info quoted above from VW is incorrect?The reduction in range in cold weather is not just due to the use of charge in heating the car, but also due to lower efficiency in releasing energy from the battery and a reduction in the amount available for release. So even if you drove without the heater at all you get reduced range, and this is reduced further by using the heater. The heat pump reduces that final reduction by up to 80% but cannot touch the other reductions so will not get you back the full heater off range let alone to full Summer range.
Trust me, I know this from pushing the range limits in a heat pump equipped LEAF and having to drive without even the heat pump to have sufficient range in a car that could achieve the range on 80% charge in the Summer.
Even with petrol cars, the MPG is massively reduced during winter temperatures due to simple physics. In addition to what dk6780 said, the cold air is also a lot denser than warm air, which results in more resistance. So the battery/engine has to work harder to move the car. This is a known fact about cars operating in Winter.So the info quoted above from VW is incorrect?
In ICE the heating is always 'free', so there's no difference in using the heater. In an EV even with a heat pump this could be 1-2 kW, which might be 10% of range in a smaller battery car.Even with petrol cars, the MPG is massively reduced during winter temperatures due to simple physics.
Of course and I completely agree. I never said otherwiseIn ICE the heating is always 'free', so there's no difference in using the heater. In an EV even with a heat pump this could be 1-2 kW, which might be 10% of range in a smaller battery car.
That's not true. Can I ask where you got this information from? Can you provide a source?With an ICE, colder, denser air improves the cycle efficiency a little bit.