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Re: mmbtu rating


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Posted by jim on July 20, 2011 at 10:47:16:

In Reply to: Re: mmbtu rating posted by jim on July 20, 2011 at 10:28:09:

: : : I need some help in calculating the mmbtu rating of a steam boiler. Is there a formula for this? what knowns are used for the calculation

: : First thing are you looking for an input or output? The output is easy, it takes ballpark 1,000 btu to turn 1 pound of water at 212 deg F into 1 pound of saturated steam. So if your steam output is 1,000 lbs/hr that is roughly 1 mmbtu output.

: : Input is different because that is a function of the efficiency of the boiler. That will require more detail on your boiler

: Looking for output. The boiler plate list 60,000 lbs/hr with a 250 mawp. The manufactur list the boiler as a 72.84mmbtu. My question is how did they come up with the 72.84mmbtu rating?

Correction. the manufacturer list the design input at 72.84mmbtu. Question is still the same.


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