I am a mechanical engineering student and for my final project I am designing a solar car ventilation system so I need to know how much power the air conditioner of a car (Mazda Lantis 323 2001) fan needs to get from solar panel(12V) in order to operate properly?
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1\$\begingroup\$ Use a clamp-on DC meter to measure the fan current. Then calculate power from P = VI. Most air-conditioning heat pumps are driven by a belt from the engine. No engine rotation? No air-con! \$\endgroup\$– TransistorCommented Dec 1, 2019 at 12:14
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1\$\begingroup\$ Most ac pumps need 6 or 8 horsepower... \$\endgroup\$– Solar MikeCommented Dec 1, 2019 at 12:17
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The compressor won't work, but you can circulate some air perhaps.
According to this blog the interior fan takes anywhere from 5 to 20 Amps depending of speed switch.
It's a simple 12V radial fan.
I estimate this being similar in all ICE cars. This part isn't reinvented a lot.
