Half a croissant, on a plate, with a sign in front of it saying '50c'

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Stirling A/C

Stirling motor drives A/C Compressor

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Heat taken from the manifold of engine can run a Stirling engine to drive the A/C compressor, or non-vital engine components that brakes the engine.

This way you can have very small engines, and still accomodate an A/C without putting pressure on the engine.

—	noyola, May 16 2009

Been thought of before http://en.wikipedia...#Automotive_engines
The last sentence in the first paragraph of the link seems to resemble your idea. [skegger, May 16 2009]

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Interesting, but I don't think it is original. See [Link].

—	skegger, May 16 2009

[marked] skegger for moderator...

shame, he doesn't give an address for admiration

—	po, May 16 2009

Why don't auto makers do more in the way of capturing lost energy? These engines produce a ton of heat, and it can be used in so many ways. I think BMW did something with a steam based turbocharger but wouldn't it be a relatively easy fix to power the AC (a big fuel consumer) with engine heat? I'm going to start my own car company one of these days.

—	DIYMatt, May 17 2009

DIYMatt, that's just the point. Something should be done with that wasted heat.

—	noyola, May 18 2009

I know, I went on a momentary rant about how much the corporate world sucks.

—	DIYMatt, May 18 2009

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