In an ideal Diesel cycle, the temperature and pressure before the start of the compression process (state 1) are 290 K and 100 kPa, respectively. The temperature after the compression process (state 2) is 860 K. The specific heat added during the process from state 2 to state 3 is 1115 kJ/kg. The ambient temperature and pressure around the engine are 290 K and 100 kPa, respectively. The heat source has a temperature of 2000 K, and heat is rejected to the ambient temperature at 290 K. Use variable specific heat capacities and the relevant equations and procedures in the solution of the problem. Tasks: a) Calculate the cycle's nominal compression ratio.b) Calculate the pressure in state 2.c) Calculate the temperatures in state 3 and state 4. Also, calculate the cycle's cutoff ratio.d) Calculate the cycle's thermal efficiency, second-law efficiency, and mean effective pressure (MEP).
In an ideal Diesel cycle, the temperature and pressure before the start of the compression process (state 1) are 290 K and 100 kPa, respectively. The temperature after the compression process (state 2) is 860 K. The specific heat added during the process from state 2 to state 3 is 1115 kJ/kg. The ambient temperature and pressure around the engine are 290 K and 100 kPa, respectively. The heat source has a temperature of 2000 K, and heat is rejected to the ambient temperature at 290 K.
Use variable specific heat capacities and the relevant equations and procedures in the solution of the problem.
Tasks:
a) Calculate the cycle's nominal compression ratio.
b) Calculate the pressure in state 2.
c) Calculate the temperatures in state 3 and state 4. Also, calculate the cycle's cutoff ratio.
d) Calculate the cycle's thermal efficiency, second-law efficiency, and mean effective pressure (MEP).
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