On 7/27/20 12:21 PM, Lee Hart via EV wrote:
Robert Bruninga via EV wrote:
Now the ICE is assumed to be generating power from an ICE and so WHAT is
the amount of heat exhausted to the outside to achieve the same 1 kW of
cooling?
My feeling is that there is no simple answer. It would depend heavily
on the conditions!
I think I would approach it from the "fuel consumed" end. Measure the
amount of fuel the ICE uses when left idling for an hour with the the
A/C on, and then again with the A/C off (same day, same location,
etc.) This might be most easily done in a car that has an MPG
computer, though I don't know how accurate they would be while idling.
I think it is also important to then adjust the ICE AC efficiency by
accounting for the net increase of AC load caused by the waste engine heat.
It's nice to use waste heat to heat the cabin, but when you're
GENERATING waste heat to COOL the cabin, your cooling demands go up as
you increase the cooling to meet the increased demand.
Not to mention what you're doing to the couple next to you that are not
running their car and have the windows down..
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