> A pet scheme of mine is a refrigeration unit run by waste heat.
> Someone's already
> done it & I don't know about it, probably.

Gagglefraffel Vuilleumier machine (if I can still remember how to
spell it after quite some years.).
People had patents for them as auto airconditioners, and it's an
obvious application, but I've never heard of a commercial one.

A VM machine is a Stirling Cycle aka carnot cycle heat pump. It can
not be reversed to be used as a \n engine (i\unlike a Stirling
machine) for reasons which will be obvious from the following.

A VM machine is VERY easy to build, VERY non demanding and brain
zappingly obvious in retrospect if you are generally au fair with the
basic principles of a Stirling engine.

A VM machine has TWO displacers and no piston. It pumps heat and does
no mechanical work directly. You could use the heat or coolth to drive
a heat engine but as will also be seen it usually makes no sense to do
so.

have to go out.
May expand later (pun noted).
1 minute into.

2 displacers
Hot ambient and cold spaces.
Can cool cold space by moving gas from hot to ambient.
Can heat hot space by moving gas from cold to ambient.

Cooler:
HDh =3D Hot displacer moved into hot space etc

Ambient space is clamped to local ambient with a heat sink etc. (Air
flow in car)

Initial:
HDa
CDa

Start

1. HDa-> HDh.
gas moves H->A
pressure drops.
Cold end cools due to dro in pressure.

2. CDa-> CDc.
Gas moves C->a.
Pressure rises bu sizing f spaces and regenerators H-A and A-C limit change=
..

3. HDh-> HDc
System pressure rises.
Ambient pressure rises so temperature rises so heat expelled from
system at ambient.

Coldlspace has Dc jn it so temperature not affected.

4. CDc-> CDa
You work it out.

Repaeat from 1.

More anon if interested.
Gadfly knows.

Going out ...


   Russell





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