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On Wed, 2006-11-22 at 23:32 +0000, James Fidell wrote: > Ben Goodger wrote: > > There has to be some way to use that with a Stirling > engine... > I'd been thinking along those lines myself for decades - sterling cycle to "mop up", even thermocouples for low electricity use circuits. Sterling engine can of course be used with a thermal store tank and solar panel to to create rotary mechanical force for a gennie. Also use to drive compressor heat pump, say solar greenhouse up side of house to eaves in summer will get bloody hot at top. Stick arse end of sterling into that hot bit, have long vertical pipework for heat exchanger fluid, voila, essentially free air conditioning to keep core of house cool. Mmehinks the nub of the issue is constructing and insulating sufficient mass of a bulk thermal store in a domestic house situation - tonnes of hot water with every available erg dumped into heating it wrapped up in, oooh, 500mm of polyurethane insulation around it and then this used as the heat source for the point of delivery systems. Energy for this can be put into the storage any which way, low tek, high tek, ventilation recapture, you name it, it ends up as heat near boiling say 5 tonnes of heavily salinated (or whatever one uses, glycol even) fluid in the loft if your struture will take it (ours can() or underground tankage. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html