In reply to Michel Jullian's message of Fri, 11 Jan 2008 23:34:27 +0100: Hi, [snip] >I just saw Robin's explanation for the discrepancy (heat taken from ambient >air during expansion, >which produces cold air as is well know), it makes sense to me. It's quite >remarkable that 9 kWh out >of the 12 seem to be provided by the environment! [snip] Of course this also means that quite a lot more work has to be done to compress the air in the first place than one might at first guess. However if the air compressor is in your garage, then a nice synergy is possible. The waste heat from the compression phase might be used to heat the hot water in the hot water system. :)
Regards, Robin van Spaandonk The shrub is a plant.
