> > >Yes, most heat pumps that are sold in Europe are using piston compressors >from industrial fridge and freezer applications. In fact, many of them >comes from a factory in Lyon, France, that are the market leader on those >compressors. They work fine and have a life span of 15 to 25 years. One >advantage of using such a diesel unit, is that it is already possible with >variable speed, which give clear efficiency advantages, compared with an AC >driven unit, 20 to 30% less energy consumption. In this case it does not >matter that much that they probably are over sized for what is needed for a >medium size home. Often they have a 200 to 300 Watt generator on them for >battery charging and if that one can be made bigger, you have a good >charger for batteries and it can also be combined with solar/wind. They are >often water cooled, which provides for a circuit for warm water production. >Can be modified to run on biodiesel or modified to run directly on straight >vegetable oil or well filtered waste vegetable oil. > >We should try to find manufacturers of those units, to see what is >available and pricing. They have to be modified like the heat pumps, so >they can have other types of primary and secondary circuits. A good used >one, would be very valuable. > >Hakan > > >At 16:41 03/12/2003, you wrote: > >How about one of the large diesel coolers from a refrigerated tractor > >trailer? A diesel engine runs a cooler (heat pump) that keeps the > >internal temp of the trailer below freezing. Should work in reverse > >too, as it has to get rid of its "waste" heat. And could be used as > >an air conditioner in the summer. > > > >Jimbo > > > >Yahoo! Groups Sponsor >ADVERTISEMENT ><http://rd.yahoo.com/SIG=12ca745jk/M=267637.4116732.5333197.1261774/D=egroupweb/S=1705016061:HM/EXP=1070560191/A=1853619/R=0/*http://www.netflix.com/Default?mqso=60178356&partid=4116732> >click here > >[] > > >Your use of Yahoo! Groups is subject to the ><http://docs.yahoo.com/info/terms/>Yahoo! Terms of Service.
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