Converting CFM to MMBTU (Natural Gas)

1 Cft gas = 970 Btu. Rounded 1000 Btu

1 mmbtu = 1,000,000

Therefore, 1 cft gas = 1000/10000000 = 0.001 mmbtu

Calculation for example :

1 . AS PER BOILER MAINTENANCE MANUAL:

15000 LB/HR(6800 KG/HR) = 19.6 X 1,000,000 = 19,600,000 BTU

1 CFT GAS PRODUCED = 1000 BTU

CFT = 19600000/1000 = 19600 CFT

MMBTU = 19600 X 1000/ 1000000 = 19.6 MMBTU

AT 80% EFFICIENCY = 19.6 + 4.9 = 24.5

Cost per 1 MMBTU = RS. 208.56 DECEMBER 2005 RATES

COST OF 24.5 = RS.208.56 X 24.5 = RS.5109.72 /HR FOR 15000 LBS/HR

COST/LB STEAM = RS.0.34/LB STEAM

COST/KG STEAM = RS.0.75/KG STEAM

COST/T STEAM = RS.750.00/ T STEAM AT 80% EFFICIENCY

Generally true, but do confirm the BTU/Cu Ft numbers from your natural gas supplier. there may be some variation on where the gas comes from. Also, producer gas can be as low as 500 BTU/cu ft.

Txs. Yes you are so right. We never get 970 Btu but between 840 Btu/Cft to 880 Btu/cft but never 970 Btu/cft. He needs to reconfirm from the Gas Company.

Thanks again

perfect ducon

Please see

www.littlegreenhouse.com

For BTU Fuel Consumption Per Hour you will find

cubic ft of natural gas BTU Watts Gallons of Propane

1 1020 293 0.01

Best Wishes