Modern Engineering Thermodynamics

Example 13.12

The average power cylinder and compression cylinder pressures for the early 1878 Brayton cycle engine shown in Figure 13.45 were p₁ = p_4s = 0.210 MPa and p_2s = p₃ = 0.190 MPa, respectively. For this engine, determine

a. The isentropic pressure ratio PR.

b. The isentropic compression ratio CR.

c. The Brayton cold ASC thermal efficiency.

Figure 13.45 Example 13.12.

Solution

Using the Brayton cycle diagram shown in Figure 13.44, we can carry out the following analysis.

a. The isentropic pressure ratio of a Brayton cycle engine is given by

b. The isentropic compression ratio of a Brayton cycle engine is given by

c. Equation (13.23) ...