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[userdk]

1. How do you integrate a exchanger into a pool filter system? (keep debris out of exchanger)
2. How does salt or chlorine affect plate exchangers, or tube exchangers.
3. How do you decide what size of exchanger you need.
4. How do you hook it up electronically, with a Ranco? How about a mix valve?
5. Can a standard pump that comes with a pool filter system stand pushing it through the filter, and the exchanger?

[mlappin]

From the research I've done for a neighbor:

1: exchanger goes in the line going to the pool from the pump/filter assembly
2: Stainless steel for chlorine, titanium for salt.
3: Most pool exchangers are rated for the gallons of the pool and are designed to raise the pool 1 degree per hour. If you want faster heating double the size of your exchanger to get 2 degrees per hour, either will place a very large load on your OWB, a thermostatic bypass is highly recommended.
4: Either use your Ranco to control the pump from your OWB to the exchanger or install a electric bypass valve in the OWB circuit to bypass the heat exchanger when the pool is up to temp
5: The shell and tube exchanger used with a pool are designed for a pool so the standard pool pump will still have enough flow.

[userdk]

How much drag would a 18 foot diameter X 4 feet depth pool put on a furnace?

[LittleJohn]

How much drag would a 18 foot diameter X 4 feet depth pool put on a furnace?

"A Btu is defined as the amount of heat required to raise the temperature of one pound avoirdupois of water by one degree Fahrenheit"

Rough calculation -> 7600 gallons of water or about 63000 pounds of water
...so for every 1 degree you want to raise the pool it looks to be at least 63k btu