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12-05-2010, 01:43 AM   #1
tnbrewer371
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 propane burner help

How many btus do I need from a propane burner to bring 8 gals of runnings to a boil in my 42qt pot in around 30 mins

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12-05-2010, 04:28 AM   #2
Hex23
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I'd estimate about 55,000 BTU/hr which is well within the range of many propane turkey fryer burners.

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8.35 lb/gal * 8 gal = 66.8 Lbs

Assume the water is at room temperature ~70 F and needs to make it to 212 F (boiling at sea level).

That's 142F change of 66.8 lbs. of water.

1 BTU is the amount of energy to increase 1 lb. of water by 1 degree F.

142F * 66.8 lbs = 9486 BTU in 0.5 hr, so 18971 BTU/hr

But, if I remember correctly, the typical efficiency of heat transfer for a propane burner is about 35%,

So, you'd need about 54203 BTU/hr.

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