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QUESTION 3 (25 MARKS In a power plant boiler, coal which has an ultimate analysis by...
1 kmol of gas Ethane is burned with 175 percent theoretical air in a steady flow...
1 kmol of gas Ethane is burned with 175 percent theoretical air in a steady flow combustion chamber. An analysis of the combustion gases reveals that all the hydrogen in the fuel burns to H2O but 95 percent of the Carbon burns to CO2 with the remaining 5 percent forming CO. Treating the air as dry air, determine; (a)The balanced combustion equation. (b)The air-fuel ratio. (c)The amount of heat transfer (in kJ/kg of fuel) from the combustion process if the...
QUESTION 1 150 Marks] a) A Coal from Indonesia which has an ultimate analysis (by mass) as 67.40 ...
QUESTION 1 150 Marks] a) A Coal from Indonesia which has an ultimate analysis (by mass) as 67.40 % C, 5.31 % Нг, 15.11 % 02, 1.44 % N2, 2.36 % S, and 8.38 % ash (non-combustibles) The coal is burned with 40% excess air. Determine: 1. The total mole number of the coal Marks] 2. The mole fractions of each component of the [7 Marks] 3. Stoichiometric combustion equation [12 coal Marks] 4. The mass of air required per...
A boiler burns a biofuel, which is a mixture of 91 % Cellulose (C6H1005) and 106...
A boiler burns a biofuel, which is a mixture of 91 % Cellulose (C6H1005) and 106 I6 Paracoumaryl alcohol (C9H1002) in mass. (a) Write down the stoichiometric combustion equation of this biofuel. [8 marks] (b) The biofuel and excessive air are supplied to the combustion chamber at 298 K. The measured adiabatic flame temperature of the combustion of the biofuel with excess air is 2225 K. Determine the percentage excess air of this combustion using the constant averaged specific heats:...
Methane gas is burned with 30 percent excess air. This fuel enters a steady-flow combustor at 0.9 atm and 25'C...
Methane gas is burned with 30 percent excess air. This fuel enters a steady-flow combustor at 0.9 atm and 25'C and is mixed with the air. The products of combustion leave this reactor at 0.9 atm and 1600 K. Determine the equilibrium composition of the products of combustion and the amount of heat released by this combustion in kJ/kmol methane. Use data from the tables. CH4 Combustion 25℃ CO, HO 1600 K 30%acess 25 C The amount of carbon dioxide...
Required Information NOTE: This is a multi-part question. Once an answer is submitted you will be...
Required Information NOTE: This is a multi-part question. Once an answer is submitted you will be unable to return to this part Gaseous propane (C3H8) Is burned In a steady-flow, constant-pressure process at 100 kPa with 200 percent theoretical alr. During the combustion process, 90 percent of the carbon in the tuel is converted to CO2 and 10 percent is converted to CO. Use data from the tables Determine the heat transfer from the combustion chamber In kJ, after 50...
A) A Coal from Indonesia which has an ultimate analysis (by mass) as 67.40 % C. 5.31 % H2, 15.11 ...
a) A Coal from Indonesia which has an ultimate analysis (by mass) as 67.40 % C. 5.31 % H2, 15.11 % O2, 1.44 % N2, 2.36 % S. and 8.38 % ash (non-combustibles) The coal is burned with 30% excess air. Determine: i) The mole fractions of each component of the coal [10 Marks] ii) The combustion equation [14 Marks] iii) The mass of air required per unit mass of coal burned [7 Marks] iv) The total mole number of...
Question 4 Benzene gas (C&H6) at 25 deg C is burned during a steady flow combustion...
Question 4 Benzene gas (C&H6) at 25 deg C is burned during a steady flow combustion process with 95% theoretical air that enters the combustion chamber at 25 deg C. All the hydrogen in the fuel bums to H20, the carbon bums to CO and CO. f the products leave at 1000 K, determine a the mole fraction of the CO in the products [101 the heat transfer from the combustion chamber per kmol of fuel (15] b. (0.021cr
QUESTION 3 [TOTAL MARKS:20] (a) Explain the difference between the enthalpy of formation and enthalpy of...
QUESTION 3 [TOTAL MARKS:20] (a) Explain the difference between the enthalpy of formation and enthalpy of combustion [4 marks] (b) Carbon reacts with Hydrogen to form Kerosene (C12H26) vapour in a steady flow chamber. Calculate the energy per kg of Kerosene produced and state the type of reaction. [4 marks] (c) Taking Kerosene as C12H26, Kerosene is burned with 20% excess air. Determine the air fuel ratio by mass for this combustion reaction. [7 marks] (d) Determine the enthalpy of...
Problem 1 (Marks 3) Smithfield power station in NSW, Australia operates on 4 gas turbines. Each of the gas turbine unit...
Problem 1 (Marks 3) Smithfield power station in NSW, Australia operates on 4 gas turbines. Each of the gas turbine unit operates on the regenerative Brayton Cycle between the pressure limits of 100 kPa and 700 kPa. Air enters the compressor at 30°C at a rate of 12.6 kg/s and leaves at 260°C. It is then heated in a regenerator to 400°C by hot combustion gases leaving the turbine. Diesel fuel with heating value of 42,000 kJ/kg is burned in...
Problem 15.10: Liquid octane (CsHis) enters a steady-flow combustion chamber at 25°C and 1 atm at...
Problem 15.10: Liquid octane (CsHis) enters a steady-flow combustion chamber at 25°C and 1 atm at a rate of 0.35 kg/min. It is burned with 50 percent excess air that also enters at 25°C and 1 atm. After combustion, the products are allowed to cool to 25°C. Assuming complete combustion and that all the H2O in the products is in liquid form, determine (a) the heat transfer rate from the combustion chamber, (b) the entropy generation rate, and (c) the...
QUESTION 1 150 Marks] a) A Coal from Indonesia which has an ultimate analysis (by mass) as 67.40 % C, 5.31 % Нг, 15.11 % 02, 1.44 % N2, 2.36 % S, and 8.38 % ash (non-combustibles) The coal is burned with 40% excess air. Determine: 1. The total mole number of the coal Marks] 2. The mole fractions of each component of the [7 Marks] 3. Stoichiometric combustion equation [12 coal Marks] 4. The mass of air required per...
A boiler burns a biofuel, which is a mixture of 91 % Cellulose (C6H1005) and 106 I6 Paracoumaryl alcohol (C9H1002) in mass. (a) Write down the stoichiometric combustion equation of this biofuel. [8 marks] (b) The biofuel and excessive air are supplied to the combustion chamber at 298 K. The measured adiabatic flame temperature of the combustion of the biofuel with excess air is 2225 K. Determine the percentage excess air of this combustion using the constant averaged specific heats:...
Methane gas is burned with 30 percent excess air. This fuel enters a steady-flow combustor at 0.9 atm and 25'C and is mixed with the air. The products of combustion leave this reactor at 0.9 atm and 1600 K. Determine the equilibrium composition of the products of combustion and the amount of heat released by this combustion in kJ/kmol methane. Use data from the tables. CH4 Combustion 25℃ CO, HO 1600 K 30%acess 25 C The amount of carbon dioxide...
Required Information NOTE: This is a multi-part question. Once an answer is submitted you will be unable to return to this part Gaseous propane (C3H8) Is burned In a steady-flow, constant-pressure process at 100 kPa with 200 percent theoretical alr. During the combustion process, 90 percent of the carbon in the tuel is converted to CO2 and 10 percent is converted to CO. Use data from the tables Determine the heat transfer from the combustion chamber In kJ, after 50...
a) A Coal from Indonesia which has an ultimate analysis (by mass) as 67.40 % C. 5.31 % H2, 15.11 % O2, 1.44 % N2, 2.36 % S. and 8.38 % ash (non-combustibles) The coal is burned with 30% excess air. Determine: i) The mole fractions of each component of the coal [10 Marks] ii) The combustion equation [14 Marks] iii) The mass of air required per unit mass of coal burned [7 Marks] iv) The total mole number of...
Question 4 Benzene gas (C&H6) at 25 deg C is burned during a steady flow combustion process with 95% theoretical air that enters the combustion chamber at 25 deg C. All the hydrogen in the fuel bums to H20, the carbon bums to CO and CO. f the products leave at 1000 K, determine a the mole fraction of the CO in the products [101 the heat transfer from the combustion chamber per kmol of fuel (15] b. (0.021cr
QUESTION 3 [TOTAL MARKS:20] (a) Explain the difference between the enthalpy of formation and enthalpy of combustion [4 marks] (b) Carbon reacts with Hydrogen to form Kerosene (C12H26) vapour in a steady flow chamber. Calculate the energy per kg of Kerosene produced and state the type of reaction. [4 marks] (c) Taking Kerosene as C12H26, Kerosene is burned with 20% excess air. Determine the air fuel ratio by mass for this combustion reaction. [7 marks] (d) Determine the enthalpy of...
Problem 1 (Marks 3) Smithfield power station in NSW, Australia operates on 4 gas turbines. Each of the gas turbine unit operates on the regenerative Brayton Cycle between the pressure limits of 100 kPa and 700 kPa. Air enters the compressor at 30°C at a rate of 12.6 kg/s and leaves at 260°C. It is then heated in a regenerator to 400°C by hot combustion gases leaving the turbine. Diesel fuel with heating value of 42,000 kJ/kg is burned in...
Problem 15.10: Liquid octane (CsHis) enters a steady-flow combustion chamber at 25°C and 1 atm at a rate of 0.35 kg/min. It is burned with 50 percent excess air that also enters at 25°C and 1 atm. After combustion, the products are allowed to cool to 25°C. Assuming complete combustion and that all the H2O in the products is in liquid form, determine (a) the heat transfer rate from the combustion chamber, (b) the entropy generation rate, and (c) the...
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