7/25/2019 Ideal Cycles.pdf

1/9

Ideal Thermodynamic Cyc

7/25/2019 Ideal Cycles.pdf

2/9

Rankine Cycle

1 2 : isobaric heat addition

2 3 : isentropic, adiabatic expansion

3 4 : isobaric heat rejection

4 1 : isentropic, isochoric, adiabatic compression

qin

7/25/2019 Ideal Cycles.pdf

3/9

Brayton Cycle1 2 : isentropic compression

2 3 : isobaric heat addition

3

4 : isentropic expansion4 1 : isobaric heat rejection

open-cycle closed-cycle

7/25/2019 Ideal Cycles.pdf

4/9

Thermal efficiency

=

Based on the 2nd Thermodynamic Law (Kelvin-Planck Postulat), no heathas 100 % efficiency.

=

7/25/2019 Ideal Cycles.pdf

5/9

7/25/2019 Ideal Cycles.pdf

6/9

7/25/2019 Ideal Cycles.pdf

7/9

7/25/2019 Ideal Cycles.pdf

8/9

7/25/2019 Ideal Cycles.pdf

9/9