Question: The gaseous effluent from a process is 3 0 m ' / min at 6 5 C . How much natural gas at 8 9

The gaseous effluent from a process is 30 m'/min at
65C. How much natural gas at 8900 kg cal/ m' would have to be burned per hour to raise the effluent temperature to 820C? Natural gas requires 10m3 of air for every cubic meter of gas at a theoretical air/fuel ratio.
Assume the air temperature is 20C and the radiation and convection losses are 10%.

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