how many BTU's?

[fabguy01]

Just got done with my latest test burn. Went from 67 deg. to 180 deg in 2 hours 10 minutes. whats the calculation to figure this? how does this compare with you gasser guys?

 

[Robby]

I believe a BTU is the energy to raise 1lb of water 1 degree fahrenheit. U.S. gallon weighs about 8.35lbs. Time is only important if you want BTU's per hour, which would then give you very good info on meeting your house needs.

I think this is right. Someone will chime in if I am wrong.

Robby

 

[jebatty]

Sounds like you are really happy with your home-brew system. Pride well deserved. Your question, however, is impossible to answer from the data provided. For example: 1) how many gal of water; 2) where was the temp measured (boiler supply/top of boiler, bottom of boiler, etc.); 3) how many lbs of wood were burned, 4) was this a static heat test of the boiler (no water circulation) or was the boiler supplying heat; 5) was your entire 1000 gal of storage, top to bottom, at 180F; 6) probably a lot more.

 

[fabguy01]

Sounds like you are really happy with your home-brew system. Pride well deserved. Your question, however, is impossible to answer from the data provided. For example: 1) how many gal of water; 2) where was the temp measured (boiler supply/top of boiler, bottom of boiler, etc.); 3) how many lbs of wood were burned, 4) was this a static heat test of the boiler (no water circulation) or was the boiler supplying heat; 5) was your entire 1000 gal of storage, top to bottom, at 180F; 6) probably a lot more.

sorry forgot to say that I havent got the storage plumbed in yet. This was just a test of the new air supply system, I went to a negitive pressure system like a garn. The boiler its self is 265 gal and stays quite stratified, was filled about half Approx 6 splits of popular 4 splits of white pine and two of oak. I know this is prob still not enough info , but I will need to do another test today or tomarrow after I revamp the heat exchanger to try to get my stack temps down, at one point during the last burn they hit 625 I would like to see them no higher than 450-500

 

[flyingcow]

Don't forget the pics.