On 9/27/05, Hakan Falk <[EMAIL PROTECTED]> wrote: > > Ken, > > If you can use PVC pipe, your efficiency is very low to > start with. Normal PVC starts to soften at 60 degree C > and carbon reinforced ones at 95 degree C. The surface > temperatures in normal copper based solar panels can > be a few hundreds of degree C and it is always special > soldering in them, otherwise the soldering will melt or > degenerate. > > I would not recommend any plastics, if you cannot get > the special ones that NASA uses.
Thanks for his piece of information, I was not of heat sensivity of PVC. I thought that it was much more heat resistent. >They are quite expensive, > so do not forget to ask for a special discount, based on > your good looks or intentions. Has my mom been bragging about me again? Thanks again, Ken _______________________________________________ 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/
