Natural gas, consisting of 80% by volume of CH4 and 20% C2H6, is burned in 40% excess air. The air enters the combustion chamber at 1 bar and 120°C, while the fuel is supplied at 1.02 bar and 25°C....

Natural gas, consisting of 80% by volume of CH4 and 20% C2H6, is burned in 40% excess air. The air enters the combustion chamber at 1 bar and 120°C, while the fuel is supplied at 1.02 bar and 25°C. The combustion products leave at 0.98 bar and 430°C. Determine the heat interaction of the process.