Question

Q4. Diesel Cycle (10 points) An ideal diesel engine has a compression ratio of 18 and uses the air as the working fluid. The state of air at the beginning of the compression process is 100 kPa and 30°C. If the maximum temperature in the cycle is not to exceed 2300 K, determine (a) the thermal efficiency; (b) the mean effective pressure ( wnet/(Vmax-Vmin) ). Assume constant specific heats for air at room temperature. The properties of air at room temperature are Cp = 1.005 kJ/kg·K, Cv = 0.718 kJ/kg·K, R = 0.287 kJ/kg·K, and ? = 1.4. P Fuel injection 2 3 4 Exhaust 1 V

          Q4. Diesel Cycle (10 points)
An ideal diesel engine has a compression ratio of 18 and uses the air as the working fluid. The state of air at the beginning of the compression process is 100 kPa and 30°C. If the maximum temperature in the cycle is not to exceed 2300 K, determine
(a) the thermal efficiency;
(b) the mean effective pressure ( wnet/(Vmax-Vmin) ).
Assume constant specific heats for air at room temperature. The properties of air at room temperature are Cp = 1.005 kJ/kg·K, Cv = 0.718 kJ/kg·K, R = 0.287 kJ/kg·K, and ? = 1.4.
P
Fuel injection
2 3
4
Exhaust
1
V

Q4. Diesel Cycle (10 points)
An ideal diesel engine has a compression ratio of 18 and uses the air as the working fluid. The state of air at the beginning of the compression process is 100 kPa and 30°C. If the maximum temperature in the cycle is not to exceed 2300 K, determine
(a) the thermal efficiency;
(b) the mean effective pressure ( wnet/(Vmax-Vmin) ).
Assume constant specific heats for air at room temperature. The properties of air at room temperature are Cp = 1.005 kJ/kg·K, Cv = 0.718 kJ/kg·K, R = 0.287 kJ/kg·K, and ? = 1.4.
P
Fuel injection
2 3
4
Exhaust
1
V

Added by Andrew O.

Question

Please give Ace some feedback