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Author Topic: Boiler for unknown wood burner  (Read 2948 times)
Greenbeast
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« on: January 19, 2010, 09:09:36 AM »

I may have the chance of a free wood burner, if i can't determine the make/model is there such a thing as a universal back boiler that i could use to extract heat from it?
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stephendv
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« Reply #1 on: January 19, 2010, 10:42:28 AM »

Yessum: http://www.charnwood.com/charnwood-flue-boiler.asp
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http://www.casanogaldelasbrujas.com
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TwoHorsePower
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« Reply #2 on: March 04, 2010, 10:55:44 PM »

You can also make your own 'stack coil' heat exchanger out of coiled copper tube. Fill the tube with tightly packed sand or salt before coiling, then insert inside you flue pipe.

I don't really like the basic stack coil design though, as the copper can tar up easily and needs frequent cleaning, plus the stove, when lit, is always heating water whether you want it or not. There's however a better version of the stack coil that entails having 2 parallel flue stacks, where you switch the flue gases (via a simple choke valve) to the flue with the copper HE coil only when you need to heat the water, and only when your stove is up to temperature.

I can send you the pdf of the guidebook if you like - tells you how to make both versions.
 
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Rooster
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« Reply #3 on: March 05, 2010, 11:47:32 AM »

I'd like a copy of the pdf if you don't mind sending it!

I've been contemplating the design of a flue that allows you to divert the gases away from the HE when needed so this would be interesting to see.

I'll pm you an email address. Thanks.
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Roy
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« Reply #4 on: March 05, 2010, 12:01:42 PM »

Thanks TwoHorse, the need for me has now passed but sounds like rooster is interested
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Rooster
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« Reply #5 on: March 05, 2010, 08:03:53 PM »

Thanks for the PDF, looks like a few interesting reads in there!

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Roy
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