EcoRenovator - View Single Post - Solar water preheater project based on builditsolar $1000 system

mrd · 01-26-11, 08:56 PM

What search criteria are you using for the dual check valves? Would these work? $50 ea.

I was also thinking, if only the exchanger tube is required to be stainless, perhaps you could use a few small short stainless pipes inside a tank of some sort, and pipe them to recirculate the fluid a bit before exiting the exchanger? The idea is to minimize the amount of expensive stainless material. Perhaps have fluid run through the pipe, and at the exit have most of it diverted through a pipe back to the intake. An inline pump in that line could control the amount of recirculation, or simply using the appropriate ratio of pipe diameters (recirc line larger than exchanger line) such that a given proportion always recirculates.. I suppose it would take some testing and ingenuity but it could possibly be affordable to do single wall. Not really sure if you could get the same bang-per-buck performance-wise as double wall..

01-26-11, 08:56 PM	#18
mrd Apprentice EcoRenovator Join Date: Feb 2010 Location: Milford, DE Posts: 106 Thanks: 5 Thanked 9 Times in 9 Posts	What search criteria are you using for the dual check valves? Would these work? $50 ea. I was also thinking, if only the exchanger tube is required to be stainless, perhaps you could use a few small short stainless pipes inside a tank of some sort, and pipe them to recirculate the fluid a bit before exiting the exchanger? The idea is to minimize the amount of expensive stainless material. Perhaps have fluid run through the pipe, and at the exit have most of it diverted through a pipe back to the intake. An inline pump in that line could control the amount of recirculation, or simply using the appropriate ratio of pipe diameters (recirc line larger than exchanger line) such that a given proportion always recirculates.. I suppose it would take some testing and ingenuity but it could possibly be affordable to do single wall. Not really sure if you could get the same bang-per-buck performance-wise as double wall..