@123: Heat pump

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bimba7
Posts: 15
Joined: Sat Apr 06, 2024 7:11 pm

Post by bimba7 »

I was fortunate to get my 1st Edition back in April, equipped with a heat pump according to the order sheet. However, I’d like to know how I can physically verify that the heat pump is actually installed—what should I be looking for under the bonnet, in simple terms? Also, when the colder weather arrives, how will I know if the heat pump is working without having another car’s kWh to compare it to?



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Repfigit
Posts: 2
Joined: Thu Sep 19, 2024 7:26 am

Post by Repfigit »

The easiest way to tell is that the air conditioning system uses a different refrigerant. With the heat pump, it uses R-744 - pure carbon dioxide. The cars without the heat pump use R-1234yf. Under the bonnet there's a label listing the AC refrigerant and its global warming potential CO2 equivalent ratio. Unsurprisingly, R-744 has a GWP of 1.0.

My ID.3 has a heat pump but it's hard to know what impact it has. In cold weather, the car uses a lot of energy to warm up the battery and you typically have more rolling and air resistance. I also fit winter tyres, so a comparison is even harder.

My understanding is that it makes a difference mostly on long journeys, as the HP is much slower to produce heat than the normal resistive heater. It's also using waste heat from the battery and drive system as a source as well as the outside air.

There are some technical diagrams of the difference between the two systems here:

https://www.id4manual.com/heating-air-c ... -pump.html
https://www.id4manual.com/heating-air-c ... -pump.html
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