Recent content by grovelander

Yes, speed of the water seems critical. I lowered the speed of the pool pump to the lowest speed, but still don't see any temperature rise.

I have recently installed a solar heat array using glass vacuum tubes, a heat exchanger and a glycol circulation pump. The glycol enters the heat exchanger at 160 degrees and comes out at 115 degrees, but the water enters and exits the exchanger with little or no temperature rise. Any thoughts...