Bob Blick wrote: >> You can't get power from waste heat and then "freeze the output". >> You can >> derive power from the difference in temperature of the exhaust and >> ambient. >> Doing so does cool the exhaust. However, it can't cool it (in >> aggregate) below ambient without additional power input. The point >> was to use the waste heat as power, so he obviously doesn't plan to >> use additional power and it would defeat the purpose anyway. > > Hmm. Is what you are saying in contradiction to the well-known (to > old-timers) Propane Refrigerator? No. Those cool the contents of the refrigerator to below ambient, not the stream of hot stuff used to derive power from. The propane combustion exhaust will be considerably above ambient in your example. Also, the powe= r input via the combustion heat will be considerably greater than the cooling power that the unit can apply to the refrigerated space. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .