I know Rheem makes (or made) a domestic HW tank that had an internal heat exchange coil. Presumably made for solar heat. I was examining it a while back. However, being in Canada the Canadian branch did not carry it.
I have seen others build their own exchangers using solid copper pipe, utilizing reducers to actually position smaller diameter pipe inside the larger diameter pipe. The reducers were installed backwards such that the small end pointed into the larger pipe. I may have the picture files (assuming I saved them). If interested I'll try to locate them. John On 9/24/2005, "Ken Dunn" <[EMAIL PROTECTED]> wrote: >Hi all, > >Sorry for the long subject line but, I thought it may aid in archive >searches... Is there a home remedy to creating a double wall heat exchange? >I have contemplated buying two sizes of copper tubing, inserting the smaller >inside the larger and bending the two simultaneously. I could see how the >inner tubing might kink or flatten out but, I think that would be unlikely >unless I tried to bend too tight of a radius. Is there a better home-builder >solution? Perhaps there is an affordable storage tank commercially available >that makes building a backyard heat exchange mute anyway.? I'm going to need >to come up with a storage tank anyway. I understand the theoretical >pros/cons to internal and external heat exchanges but, what are the >real-world practical differences? > >Thanks a bunch, >Take care, >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/
