In old times in Iran, radiation from an enclosure to the night sky was used to accomplish local cooling to produce ice for special purposes, like the emperor's sherbets. An article in Scientific American years ago described this.
This technique needs *dry* air which will not absorb infrared radiation and reradiate it. It cannot be used in humid climates. Doug Woodard St. Catharines, Ontario, Canada On Wed, 15 Sep 2004, Doug Younker wrote: > Hi, > > But, to create ice wouldn't that require the night time temperatures to > get to freezing? Even if the goal was to cool a heat sink, power is still > would be required. > Doug > > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Tuesday, September 14, 2004 11:47 AM > Subject: Re: [Biofuel] Creating a cool room storage in a hot climate - > solar. > : > : If you have clear skies at night most of the time, solar panels can be > used in reverse to radiate heat all night long. Circulate anti freeze from > them > : to your block of ice during the night and use the ice in the usual way. > Not shure how much heat you can get rid of in this way. A calculation or > : experiment is in order. The panels could be used for heat gain during the > day in their usual way. Mount on top of your dirt mound for shade. _______________________________________________ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
