Thought that this could be interesting for the biofuel group also.
Hakan >Cornelius, > >I agree with you, but found something that is very interesting and that I >would like to explain. The cardboard soaked with water is a version of a >more than 2000 year old method to cool the air and even more important to >dry it. It is a version of the rope curtains in the entrance door of the >house, which often had a pipe from a stream of water keeping it wet with >fresh new cold water. You still find this in many developing countries. To >work, the water temperature must be lower than the air temperature, >otherwise it could have the opposite effect. When the air passes the >curtain, it will cool down and if it is very humid, it will also lose a lot >of its water content, according to the laws of relative humidity >(Molliere). After it has passed the curtain, it will again warm up and also >according to the laws of humidity, it will have a lower relative humidity >than it was before it entered the curtain. Very smart and a good example of >that people was much smarter engineers in the past, than we educated >engineers many times belive. > >Of course, if you do it wrong and the water is warmer than the air and or >not renewed from a cold source, the effect is the opposite and then we >prove how little the modern engineers really know or understand. Made in >the right way, the curtain is actually a traditional version of the modern >cooling tower in an AC system and very environment friendly. When you >understand how it works, it is possible to tweak the efficiency a little >bit or at least not make mistakes that worsen the situation. > >By the way, the old Arabian, Greek and Roman gardens, with its large number >of fountains, worked the same way. They provided shadow and was drying the >air. You only have to visit the gardens of Alhambra, Spain. in a hot August >day and the effect is obvious. > >However, the higher efficiency of a solar heated cooling system would make >a difference in the situations that you describe and result in a better >production of poultry. I do not think that it is much more to say about it >and you are right. I only wanted to add some Arab engineering history to it. > >Hakan > >At 15:22 13/12/2003, you wrote: > >There is no shortage of markets for effective airconditioning with an > >economical operating cost. I hardly know where to begin. Third world > >counties are in dire need of economical cooling even if only for the > >daylight hours. But leave this aside for now. Look at the farming > >industry. Large scale poultry houses are about 20,000 sq. ft each. They > >are "cooled" by pulling air the length of the building (500') after it has > >passed through a cardboard wall panel soaked with water. If the humidity > >outside is already 90% what good do you suppose it does to rehumidify it? > > > >A solar AC unit could pull moisture from the air as it passed a heat > >exchanger. Birds die with the humidity inside the building reaches 95% > >when the air temp inside is over 90F. I have seen 60 tons of birds die in > >45 minutes in July. Your expertise could dramatically improve the > >livability of these birds. > > > >We work with the Native American populations on reservations in the > >USA. They reject many modern conveniences on principle but also on > >environmental grounds. A nonpolluting and inoffensive cooling system > >could be very attractive to them. > > > >Lets build some of these units and I bet the market will come to us. > > > >Cornelius A. Van Milligen > >Kentucky Enrichment Inc. > >www.kentuckyenrichment.com > >[EMAIL PROTECTED] > > > >Yahoo! Groups Sponsor >ADVERTISEMENT ><http://rd.yahoo.com/SIG=12cjc782h/M=267637.4116732.5333197.1261774/D=egroupweb/S=1705083307:HM/EXP=1071427422/A=1853618/R=0/*http://www.netflix.com/Default?mqso=60178338&partid=4116732> >click here > >[] > > >To unsubscribe from this group, send an email to: > [EMAIL PROTECTED] >Archives of solar-ac messages are at: > ><http://groups.yahoo.com/group/solar-ac/messages>http://groups.yahoo.com/group/solar-ac/messages > > >Your use of Yahoo! Groups is subject to the ><http://docs.yahoo.com/info/terms/>Yahoo! Terms of Service. ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/index.php?list=biofuel Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
