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Date:         Thu, 11 Aug 1994 09:33:28 -0700
Sender:       Vanagon Mailing List <vanagon@vanagon.com>
From:         cev@rocket.com (Charles E. Vaughan)
Subject:      Re:  Solid State A/C

>Off the top of my head I remember reading 5-10 HP can be pulled from a >auto a/c, but looking at the other stuff up there that might be wrong. > >If you have 130HP then 10 HP isnt such a terrible price to pay . > >I think the problem with the Peltier approach is you have to ship >100's amps around the car in a way that Joe/Jane Citizen wont kill >themselves with it, not so much the thermo of the problem, but there >still are lots of things to look into here before giving up .... >

Yes but remember that 100 amps x 12 V = 1200 W 1200 W / (746 W/hp) = 1.6 horsepower

10 hp is 620 amps at 12 V

The key to making a system like this work is the trade-off of efficiency of the electric to thermal conversion vs. mechanical to thermal of a refrigeration system. DC to DC voltage boosting will decrease the current, but create a voltage hazard akin to an ignition system and add another 10% of inefficiency. I'm all for it but a lot of engineering is needed; it is not a "bolt-on" of an existing technology.

Charles Vaughan '84 GL (no A/C, so it's easy for me to throw stones)


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