Joe, In Israel you will see the same, but with efficient solar panels built together with an insulated storage. It is however an enormous difference in efficiency. The black cisterns have a very low efficiency and you can only collect some warm water at the end of sunny days. The main functionality of cisterns on the roof, is to give distribution pressure. It is also very large differences in the coloring methods, what is looking black to us, can have very different absorption factors. A Swedish company is the market leader in delivering the solar collection elements for solar panels. They deliver them in rolls of double black colored copper sheets. Before mounting they are cut to size and pressurized to form the space for water passage. Efficient solar panel construction was researched around 40 years ago in Almeria, Spain, a joint project between technical universities of Sweden and Spain. The Swedish part was managed by prof. Folke Petterson, KTH, who also used some simulation work with the energy transmission program that we have.
Hakan At 00:40 28/04/2006, you wrote: >Almost every house and building has a big black cistern on the >roof. The are everywhere you look. > >Joe > >Hakan Falk wrote: >> >>Joe, >> >>Yes, but Mexico it is a bit larger and more people than Israel and in >>total they do not have the same density, but last time was around 15 >>years ago and Israel the last time was around 6 years ago, China 5 >>years and Brazil last time was only 2 years ago. Time goes very fast. >>Still, I doubt it, considering that Israel is a export producer of >>thermal solar systems also. >> >>Hakan >> >>At 21:03 27/04/2006, you wrote: >> >> >> >>> >>>Hakan Falk wrote: >>> >>> >>>> >>>>Zeke, >>>> >>>>Solar thermal hot water is the cheapest and most efficient solar use, >>>>I do not understand that the use is so low. This except Israel, where >>>>you can see solar for hot water on almost every house. . >>>> >>>> >>>> >>>> >>> >>>snip >>> >>>Ever been to Mexico? >>> >>>Joe >>> >>> >>>_______________________________________________ >>>Biofuel mailing list >>><mailto:Biofuel@sustainablelists.org>Biofuel@sustainablelists.org >>>http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org >>> >>>Biofuel at Journey to Forever: >>><http://journeytoforever.org/biofuel.html>http://journeytoforever.org/biofuel.html >>> >>>Search the combined Biofuel and Biofuels-biz list archives (50,000 >>>messages): >>><http://www.mail-archive.com/biofuel@sustainablelists.org/>http://www.mail-archive.com/biofuel@sustainablelists.org/ >>> >> >> >> >> >>_______________________________________________ >>Biofuel mailing list >><mailto:Biofuel@sustainablelists.org>Biofuel@sustainablelists.org >>http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org >> >>Biofuel at Journey to Forever: >><http://journeytoforever.org/biofuel.html>http://journeytoforever.org/biofuel.html >> >>Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): >><http://www.mail-archive.com/biofuel@sustainablelists.org/>http://www.mail-archive.com/biofuel@sustainablelists.org/ >> >> >> >_______________________________________________ >Biofuel mailing list >Biofuel@sustainablelists.org >http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > >Biofuel at Journey to Forever: >http://journeytoforever.org/biofuel.html > >Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): >http://www.mail-archive.com/biofuel@sustainablelists.org/ _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
