The patent only included two low voltage strips for heating the coolant.
Actually doesn't it say they are for heating the air in the car? Specifically to help with the temperature difference between the two zones.
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The patent only included two low voltage strips for heating the coolant.
Wow - that equates to ~258 km/160 miles of range. What speeds were you driving on the highway?
I think COP is at least one, because eventually everything converts to heat. But as I mentioned in the previous post, there is still some absolute amount of heat a heat pump can generate and if OP is outside that envelope, temperature can’t be maintained.Brrrr.
I thought a heat pump at its worse works at a COP = 1
Perhaps the episode of cold air was a freezing event ?
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Agreed, but that does not explain cool air coming out of the ventI think COP is at least one, because eventually everything converts to heat. But as I mentioned in the previous post, there is still some absolute amount of heat a heat pump can generate and if OP is outside that envelope, temperature can’t be maintained.
But if outside air is -38 C and heater warms it to +10 (because its capacity is not enough), it feels cool?Agreed, but that does not explain cool air coming out of the vent
Perhaps, but OP was already driving and the car would have been in at least partial re-circ mode.But if outside air is -38 C and heater warms it to +10 (because its capacity is not enough), it feels cool?
Nope, it’s all heat pump
By the people who have never heard of NorwayTesla gets accused of designing cars for CA
I’m pretty sure he stated that there was a resistance heater to supplement the heat pump,
Technically true, but misleading, since the heat pump is operating as a resistive heater, apparently. I removed the disagree but tempted to put it back.
I can't speak to the others, but for me, it's because I'm a huge nerd. I love to learn everything I can about everything I drive (or fly), and it's fun to learn not only about the systems themselves, but also what their limits are... what scenarios they excel in, which ones they don't, how to get the most out of them. Some would call it a "hobby." Others would call it a "sickness."I don't understand why you guys are trying to troubleshoot or think OP's car is malfunctioning.
I can't speak to the others, but for me, it's because I'm a huge nerd. I love to learn everything I can about everything I drive (or fly), and it's fun to learn not only about the systems themselves, but also what their limits are... what scenarios they excel in, which ones they don't, how to get the most out of them. Some would call it a "hobby." Others would call it a "sickness."
OK, so after re-reading OP's post, and watching the videos posted by @Big Earl , it looks like @Cybr.Myk 's car was operating in "Heating Mode 5," which is at the 3:30 point in the second video. In this situation, the compressor is supplying heat for both cabin heating and battery heating. IMO, the OP found himself in a cold enough situation that the heat supplied by the compressor (and the drive motor(s))just wasn't enough to heat both the battery and the cabin.
Bjorn Nyland did take a heat pump equipped Model 3 car camping in -25C in Norway. He has a video about it that's worth watching. In this situation (car stationary), the heat pump kept the interior toasty warm. It also kept Cybr.Myk warm during stop and go driving.
So the difference appears to be highway driving. Is the system capable of bypassing the radiator? At first glance, it looks like there is just too much heat lost through the radiator at highway speeds for the system to keep up when heat is being called for at the battery and the cabin at very low temperatures. Tesla drivers might have to start borrowing a page from ICE (and especially diesel) drivers, and blocking off the radiator. Although doing so in our cars might have more negatives than positives. Personally, I'd bring blankets along before making any alterations to the heating/cooling system of our cars.
Hmmm... This whole situation has me intrigued, but not quite intrigued enough to leave my wonderful winter desert temps to venture to the ice planet of Hoth (aka, "Canada") to find out. 65F today. While you guys are keeping warm inside your Tontons, I'll be washing my car here shortly.