[Greenbuilding] heating water with wood stove - heat transfer/efficiency calculations?

Reuben Deumling 9watts at gmail.com
Wed Nov 9 09:14:31 PST 2011


Do any of you know a source for info on the following question?

* design of simple wood-fired DHW calls for a coil of copper tubing either
wrapped around the stove pipe or configured into a plate that would be
attached to the outside of the firebox thermo-siphoning to a 10 or 20
gallon storage tank in the attic. That tank of course would be plumbed into
the household water system. The question is if there are basic calculations
that would allow someone to know what sort of heat transfer rate he could
expect?

I.e., 20 lbs hardwood/160,000 BTU burned yields XY deg F increase in 10
gallons of water.

Anyone?

Thanks.
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