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Re: Automotive cooling

To: Bob Hutton <BobHutton@fox.vut.edu.au>,
Subject: Re: Automotive cooling
From: Trevor Boicey <tboicey@brit.ca>
Date: Thu, 31 Jul 1997 23:42:07 -0400
Bob Hutton wrote:
> You're ignoring the considerable cooling effect
> available in the bottom of the block from the continual
> inrush of cool fuel/air mix.

  Have you ever opened an engine before?

  The fuel air only touches the very top of the pistons
and the top chunk of the the cylinder. As well, it doesn't
do so until after it has passed through the head, so
it's "coolness" is not all so powerful.

  As well, heat transfer between the block and the gas isn't
very high until the gas is compressed, which is when
it is touching even less of the block, until it's essentially
only touching the piston.

> It provides as much cooling effect as does the radiator.

  But where does the heat GO? You seem to be saying you
can make heat disappear, which is of course against all
laws of thermodynamics.

  Heat has to GO somewhere. In a normal car, it goes into
the radiator and from that into the air. In your system
where does it go?

  Don't say "it goes into fuel air" because fuel air
enters either setup at the same temperature and
leaves at hot exhaust. It's not going to carry away
any more heat.

-- 
Trevor Boicey
Ottawa, Canada
tboicey@brit.ca
http://www.brit.ca/~tboicey/

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