At the beginning of the isentropic process of an air-standard Diesel cycle opera

Question

At the beginning of the isentropic process of an air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K and the pressure is 0.1 MPa. The cut off ratio for the cycle is 2. The compression and expansion both are isentropic and 100% efficient. SPECIFIC HEATS ARE NOT CONSTANT. Initial volume of air is V1 = 2.8 L. The following states are available:

State 1 300 K 0.1 MPa 621.2 v(r) U = 214.07 kJ/kg
State 2 898.3 K 5.39 MPa 34.51 v(r)

1) Calculate the maximum temperature and heat input of air during the pressure heat addition process, the temperature and pressure at the end of expansion process, the thermal effiency, and specific volume of air at state 1 and the mass of air in the cylinder.

Explanation / Answer

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