That one is very interesting. A couple of questions: - what is the purpose of the heat exchanger? Could the water freeze in there and cause maintenance problems? - how much vacuum is required? I'm thinking an electric vacuum pump made for hot rods might be useful. They generally turn on at < 15 psi and pump until 25 psi is reached. - do you think the adsorption material would get hot enough from solar power? 100*F is pretty hot! On 10/6/06, James Newtons Massmind wrote: > > http://techref.massmind.org/techref/other/zeolitefridg.htm Lots of links > after the main article. I would be willing to partially finance the > construction of a zeolite solar frig in return for documentation of the > effort. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist