Homework Answers
Air to fuel ratio is calculated for molar(stoichiometric) as well as the mass basis.
For dew point calculation you will need steam tables to get the final answer as clearly stated in the given solution below. Get saturated pressure of steam at Pgas and just put it in the equation. Every other value has been determined.
Volume is not given for the calculation of overall gas
constant
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during a 2. (25 pts) Diesel fuel dodecane (C12H26) is burned at constant pressure with 150%...
air during a 2. (25 pts) Diesel fuel dodecane (C12H26) is burned at constant pressure with...
air during a 2. (25 pts) Diesel fuel dodecane (C12H26) is burned at constant pressure with 150% exces combustion process. Assuming complete combustion and a total pressure of 14.5 psia, determine the a. the air fuel ratio; b. the dew-point temperature of the products; c. apparent molecular mass of the products; d. apparent gas constant of the products...
air during a 2. (25 pts) Diesel fuel dodecane (C12H26) is burned at constant pressure with 150% exces combustion process. Assuming complete...
Problem 5 0/2 points (0%) Diesel fuel (C12H26) at 25 0C is burned in a steady-flow...
Problem 5 0/2 points (0%) Diesel fuel (C12H26) at 25 0C is burned in a steady-flow combustion chamber with 30 % excess air that also enters at 25°C. The products leave the combustion chamber at 380 K. Assuming combustion is complete, Determine the required mass flow rate of the diesel fuel to supply heat at a rate of 1600 kJ/s. X 69.18758 KJs. g/s
n-Dodecane CHa is burned with 40% excess air during a combustion process. Assuming total combustion and...
n-Dodecane CHa is burned with 40% excess air during a combustion process. Assuming total combustion and a total pressure of 100 kPa, determine: CH Products COMBUSTION CHAMBER 100 kPa Air (40% excess) a) (25%) Write the combustion equation and calculate the air to fuel ratio. AF = kg air kg fuel b) (10%) The partial pressure of the oxygen in the products (assume that all products are ideal gases). Po, kea
Full Solutions please. Thank you! Dodecane is burned with 50% excess air and with a molar-base...
Full Solutions please. Thank you!
Dodecane is burned with 50% excess air and with a molar-base combustion efficiency of 90%. The emissions leave the combustion chamber at a total pressure of 100 kPa. a) Calculate the mass-base and molar-base fuel-to-air ratio. (10 pts) b) Calculate the mass-base and molar-base equivalence ratio. (10 pts) c) You should get the same result for the mass-base and molar-base equivalence ratios in part (b). Prove mathematically that it was not a fluke. (10 pts)...
Dodecane (C2H26) burns completely with 150% of theoretical air. Determine (a) the air-fuel ratio on a...
Dodecane (C2H26) burns completely with 150% of theoretical air. Determine (a) the air-fuel ratio on a molar and mass basis. (b) the dew point temperature of the combustion products, in C, when cooled at 1 atm. Ans: (a) 132.1, 22.41 (b) 44.8 deg C
Answer all the questions please Problem 1 (20 pts) (No Partial Credits) i. Butane, CaHio, is burned with air at an air fuel ratio of 20. Determine the percentage of excess ii. Benzene gas, CsHi, i...
Answer all the questions please
Problem 1 (20 pts) (No Partial Credits) i. Butane, CaHio, is burned with air at an air fuel ratio of 20. Determine the percentage of excess ii. Benzene gas, CsHi, is burned with 90% theoretical air. Assuming no hydrocarbons in the products, calculate the air fuel ratio. ill. Determine the dew point temperature of the following reaction that take place where the atmospheric pressure is 100 kPa, iv. Calculate the rs of steam at 120°C...
Fuel: 0.84C12H26+0.11C7H8+0.05C2H5OH Pressure ratio: rp = 16.7 Equivalence ratio: φ = 0.38 The fuel is a three-fuel blend of: Name Chemical Formula h¯◦f n-dodecane C12H26. −35...
Fuel: 0.84C12H26+0.11C7H8+0.05C2H5OH Pressure ratio: rp = 16.7 Equivalence ratio: φ = 0.38 The fuel is a three-fuel blend of: Name Chemical Formula h¯◦f n-dodecane C12H26. −352,100 kJ/kmol toluene C7H8 12,178 kJ/kmol ethanol C2H5OH −277,507 kJ/kmol For the inlet air conditions, use a temperature of 280 K and a pressure of 100 kPa. a) Calculate the net engine power for an air mass flow rate of 50 kg/s. • Except during combustion, assume that the working fluid is air, but account...
Liquid octane (C8H18) is burned completely during the combustion process and exit at a pressure of...
Liquid octane (C8H18) is burned completely during the combustion process and exit at a pressure of 4 atm. Determine; a. The air-fuel ratio b- The dew point temperature of the products.
Problem 1 (65 pts): The cylinder of a Diesel engine is initially filled with air at 100 kPa and 2...
Problem 1 (65 pts): The cylinder of a Diesel engine is initially filled with air at 100 kPa and 298 K (piston is at BDC). The air is then compressed isentropically with a compression ratio of 20. Fuel, n-dodecane, is then introduced and combusted with the air, which produces work output (i.e. pushes the piston back to BDC). At the end of the power stroke, the temperature of the combustion products is 1020 K. The amount of heat lost to...
A) Calculate the net work output per kmol fuel. In your analysis, assume that the fuel is introdu...
A) Calculate the net work output per kmol fuel. In your
analysis, assume that the fuel is introduced as a gas at 298K.
Now consider an Ideal Diesel Cycle that has the same compression
ratio and produces the same net work output as in Problem 1. If the
cycle has a cut-off ratio of 2:
B) Calculate the required heat input per unit mass of air.
C) Find the temperature at each state of the cycle.
Problem 1 (65 pts):...
air during a 2. (25 pts) Diesel fuel dodecane (C12H26) is burned at constant pressure with 150% exces combustion process. Assuming complete combustion and a total pressure of 14.5 psia, determine the a. the air fuel ratio; b. the dew-point temperature of the products; c. apparent molecular mass of the products; d. apparent gas constant of the products...
air during a 2. (25 pts) Diesel fuel dodecane (C12H26) is burned at constant pressure with 150% exces combustion process. Assuming complete...
Problem 5 0/2 points (0%) Diesel fuel (C12H26) at 25 0C is burned in a steady-flow combustion chamber with 30 % excess air that also enters at 25°C. The products leave the combustion chamber at 380 K. Assuming combustion is complete, Determine the required mass flow rate of the diesel fuel to supply heat at a rate of 1600 kJ/s. X 69.18758 KJs. g/s
n-Dodecane CHa is burned with 40% excess air during a combustion process. Assuming total combustion and a total pressure of 100 kPa, determine: CH Products COMBUSTION CHAMBER 100 kPa Air (40% excess) a) (25%) Write the combustion equation and calculate the air to fuel ratio. AF = kg air kg fuel b) (10%) The partial pressure of the oxygen in the products (assume that all products are ideal gases). Po, kea
Full Solutions please. Thank you!
Dodecane is burned with 50% excess air and with a molar-base combustion efficiency of 90%. The emissions leave the combustion chamber at a total pressure of 100 kPa. a) Calculate the mass-base and molar-base fuel-to-air ratio. (10 pts) b) Calculate the mass-base and molar-base equivalence ratio. (10 pts) c) You should get the same result for the mass-base and molar-base equivalence ratios in part (b). Prove mathematically that it was not a fluke. (10 pts)...
Dodecane (C2H26) burns completely with 150% of theoretical air. Determine (a) the air-fuel ratio on a molar and mass basis. (b) the dew point temperature of the combustion products, in C, when cooled at 1 atm. Ans: (a) 132.1, 22.41 (b) 44.8 deg C
Answer all the questions please
Problem 1 (20 pts) (No Partial Credits) i. Butane, CaHio, is burned with air at an air fuel ratio of 20. Determine the percentage of excess ii. Benzene gas, CsHi, is burned with 90% theoretical air. Assuming no hydrocarbons in the products, calculate the air fuel ratio. ill. Determine the dew point temperature of the following reaction that take place where the atmospheric pressure is 100 kPa, iv. Calculate the rs of steam at 120°C...
Liquid octane (C8H18) is burned completely during the combustion process and exit at a pressure of 4 atm. Determine; a. The air-fuel ratio b- The dew point temperature of the products.
Problem 1 (65 pts): The cylinder of a Diesel engine is initially filled with air at 100 kPa and 298 K (piston is at BDC). The air is then compressed isentropically with a compression ratio of 20. Fuel, n-dodecane, is then introduced and combusted with the air, which produces work output (i.e. pushes the piston back to BDC). At the end of the power stroke, the temperature of the combustion products is 1020 K. The amount of heat lost to...
A) Calculate the net work output per kmol fuel. In your
analysis, assume that the fuel is introduced as a gas at 298K.
Now consider an Ideal Diesel Cycle that has the same compression
ratio and produces the same net work output as in Problem 1. If the
cycle has a cut-off ratio of 2:
B) Calculate the required heat input per unit mass of air.
C) Find the temperature at each state of the cycle.
Problem 1 (65 pts):...
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