[757labs] air conditioner

[Nathan McGuirt]

 Good call, the electric part just runs a compressor from what I understand, but the propane ones actually use a propane flame to boil a water and ammonia mix to pump the heat out of the system. That should work with any heat source, including concentrated solar energy. 

http://home.howstuffworks.com/refrigerator5.htm

Nathan 


On Thursday, September 8, 2011 at 10:36 AM, Leroy Baynum wrote:

> Someone should look up how the camper refrigerator systems work, they can run on 12vdc, 120vac or Propane gas. 
> 
> Leroy
> vashadow
> 
> 
> 
> On Thu, Sep 8, 2011 at 10:10 AM, Steve Nelson <snelson at webapper.com (mailto:snelson at webapper.com)> wrote:
> > That just seems counter intuitive to me. Not that I was ever good at Chemistry, but I do remember pv=nrt. If the volume remains the same and the temperature rises, the pressure must rise too. 
> > 
> > So wouldn't 'warm' vs 'hot' freon just be a matter of energy input and efficiency? In other words if the temperature and pressure isn't enough...add more lens'. 
> > 
> > The other method to make it work is have the sunlight turn a steam engine which turns the compressor pump, just replacing the electric motor with a steam engine. It's not nearly as fun, but I don't see why that wouldn't work. 
> > 
> > The reason I'm bringing this all up is that I want to make a life size snow globe that blows real snow in the desert using nothing but sunlight for a future Burning Man. 
> > 
> > Steve
> > 
> > 
> > On Wed, Sep 7, 2011 at 10:20 PM, Kevin McKinley <kevin at 757.org (mailto:kevin at 757.org)> wrote:
> > >  Probably not.
> > > 
> > >  You'd end up with warm freon at only a slightly higher pressure, and
> > >  you couldn't get enough expansion to provide good cooling.
> > > 
> > >  Kevin
> > > 
> > >  On Wed, 7 Sep 2011 21:42:22 -0400
> > > Steve Nelson <snelson at webapper.com (mailto:snelson at webapper.com)> wrote:
> > > 
> > > > Can anyone tell me if this is a crazy idea or not?
> > > > 
> > > > Would it be possible to replace the compressor in an air conditioner
> > > > with a fresnel lens? Instead of heating the freon by increasing the
> > > > pressure, just directly heat the freon with sunlight through a
> > > > fresnel lens. The volume would stay the same, but the temperature
> > > > would increase. Then run the hot freon through an expansion valve
> > > > increasing the volume thus decreasing the temperature. Would that
> > > > work?
> > > > 
> > > > Steve
> > > _______________________________________________
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> > >  If we knew what we were doing it wouldn't be research.
> > 
> > 
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