Ethane (C2H6) gas at mass flow rate of 1.5 kg/min is mixed with air (O2 + 3.76N2) at mass flow rate of 1 kg/sec in a steady-state, steady-flow isobaric combustion process. All reactants enter the process at 298 K and 100 kPa, and the fuel burns to complete combustion. a) Determine the Air-Fuel Ratio (AFR) b) Write a balanced reaction equation based on one mole of fuel c) Determine the excess air fraction (%) d) Assuming that the combustion products exit the system at 1000 K, determine the volumetric flow rate of the combustion exhaust (m3 /s) e) Assuming that the combustion products exit the system at 1000 K, determine the rate of heat transfer to/from the system (kW)
Ethane (C2H6) gas at mass flow rate of 1.5 kg/min is mixed with air (O2 + 3.76N2) at mass flow rate of 1 kg/sec in a steady-state, steady-flow isobaric combustion process. All reactants enter the process at 298 K and 100 kPa, and the fuel burns to complete combustion.
a) Determine the Air-Fuel Ratio (AFR)
b) Write a balanced reaction equation based on one mole of fuel
c) Determine the excess air fraction (%)
d) Assuming that the combustion products exit the system at 1000 K, determine the volumetric flow rate of the combustion exhaust (m3 /s)
e) Assuming that the combustion products exit the system at 1000 K, determine the rate of heat transfer to/from the system (kW)
Repeat steps d and e, but assuming that the combustion product exit the system at 2000 k. Using the values in part e for 1000 k and 2000 k, apply linear interpolation to estimate the adiabatic exit temperature (?̇ = 0) for the combustion products. Next, using conservation of energy analysis, solve for the adiabatic exit temperature (+/- 5 K).
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