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Solar Refrigeration Make a solar, propane, kerosene, gasoline, methane, wood, (or any other fuel that will dry out the zeolite) powered frig. Main refrigeration unit Lowe's part# price 4 brass pipe nipples 34858 4.36 teflon tape 25010 0.97 pvc cement 23540 2.16 end cap 23900 0.88 clean out cap 23306 0.66 2 valves 56064 7.36 pvc pipe 23833 3.62 pvc coupling 2 inch 23282 0.41 pvc adaptor 23302 1.08 brass tee 34833 2.47 2 brass barb fittings 27631 2.06 (new thing that replaces compression nut) n/a empty " paint can " 27318 1.66 sub total for Main refrigeration unit w/o tax ~27.69 refrigerant part# price water n/a free zeolite n/a - try your local pet supply store ~4.88 sub total for refrigerant w/o tax ~4.88 vacuum pump part# price pvc pipe n/a (use remnant from above) dowel n/a ~1.00 rubber mat n/a 1.00 screen material (or cardboard) n/a free 2 small screws n/a ~0.73 pvc end cap 23900 0.88 brass barb fitting 1/4 inch 27631 1.03 vinyl tubing 1/4 inch 22271 .36 sub total for vacuum pump w/o tax ~5.00 also needed: cooler - I'd suggest the Coleman 36-Quart Xtreme Cooler It's guaranteed to keep ice up to 5 days in temperatures up to 90 degrees! YMMV walmart or coleman 19.72 your method for heating/drying zeolite n/a free to whatever Total project price w/o tax & your heat source is ~57.29 click images to enlarge instructions for use - Close valves. Open valve to vacuum pump. Pump vacuum pump several times. Close valve to vacuum pump. Pour in about 2 oz. of water. Open valve to water. Can should start to get hot. Ice should be forming in pvc. Close valve to water. To recharge (oven instructions) Put zeolite in a 400 degree F oven for 1 to 2 hours. Allow to cool to room temp. before re-using. [N.B. - This version DOES NOT CURRENTLY WORK- It will cool until it loses vaccum which is only a few minutes at best!] Need help ask a question or send comments to webmaster@solar.iwarp.com Every effort is taken in order to maintain accuracy in the information contained within this web site. Although all of the information is believed to be accurate you are encouraged to consult other sources for additional information or clarification. Under no circumstances shall the authors of this site be held liable for the use of the information or of its consequences. Electrical code varies from county to county, and within the US, it varies, to some extent from state to state. We take no responsibility for the content of outside links. Outside links may NOT reflect our philosophy or beliefs.