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How does a gas fridge work?

Started by scgargoyle, June 02, 2007, 10:15:26 AM

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scgargoyle

As a kid, we had an island cottage with a gas refrigerator- had a pilot light 'n everything. I did a little research, and found out they still make 'em. How does it use heat to provide cooling? Could this same technology be modified using focused solar power? I'm thinkin' the places that need air conditioning the most have the most sunshine, if it could be intensified enough. Just thinkin'....
I hope my ship comes in before the dock rots!

WH_Conley

I can't answer you question, but I remember a thread about off grid air conditioning a year or more back, seems like it was gas or wood fired, same principal as the gas fridge. Might try a search for airconditioning.
Bill

Danny_S

Plasma cutting at Craig Manufacturing

dboyt

The fridge uses a material that changes from liquid to gas at the desired temperature & pressure (freon, amonia).  It pumps it from one chamber to another.  When the referigerant flows back, it expands, which creates the cooling effect.  The simplest version of this is the "icy ball", which has been used in 3rd world countries & is easily adapted to wood or solar.  This web site used to sell plans, might still have 'em.
http://www.aprovecho.org/
Here's a good description of how it works:
http://en.wikipedia.org/wiki/Icy_Ball
Building one has been on my to-do list for more than 20 years, but the ol' Sears fridge is just too darn convenient!
Norwood MX34 Pro portable sawmill, 8N Ford, Lewis Winch

Quartlow

Ok so just how much heat do you need to recharge it, do you think it would be possible to recharge it with a heat exchanger using water from your outdoor boiler?
Breezewood 24 inch mill
Have a wooderful day!!

Woodbender

We went through Amish country a while back. Their general stores sold these things and I picked up a couple brochures thinking about remote property etc. etc.

Incredibly simple but here's a diagram (maybe I can post this - we'll see)
http://www.lpappliances.com/images/gasabs.jpg

Also they have a fairly decent website explaining how this stuff works.  Not much for moving parts.
http://www.lpappliances.com/G-Absorp.html

Links at the bottom of that page will take you to their products.  No affiliation with these people yada yada yada.

Tim Eastman (Woodbender)
Be an example worth following.

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