Question: 2 0 . Optimizing Combustion Air in Pulverized Fuel System: A pulverized fuel combustion system uses coal with a calorific value of 2 8 MJ

20. Optimizing Combustion Air in Pulverized Fuel System:
A pulverized fuel combustion system uses coal with a calorific value of 28 MJ/kg. If 2500 kg of coal are burned per hour and stoichiometric air required for complete combustion is 11 m^3/kg of coal, calculate the total air needed for combustion, and determine if using 10% excess air is beneficial in terms of combustion efficiency.

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