Question

A Brayton cycle working with air has a compression ratio of 6, between a minimum temperature of 30 °C and a maximum temperature of 1200 °C. The iso-entropic efficiency of the compressor is 70% and the isentropic efficiency of the turbine is 80%. a) Sketch the reversible and irreversible cycle on P-v and T-s diagrams showing the heat and work exchanged. b) For the irreversible cycle, find the net-work, the flow rate producing 10 MW and the entropy generated in compression and expansion. c) Find the efficiency of the reversible cycle and of the irreversible cycle.

          A Brayton cycle working with air has a compression ratio of 6, between a minimum temperature of 30 °C and a maximum temperature of 1200 °C. The iso-entropic efficiency of the compressor is 70% and the isentropic efficiency of the turbine is 80%.

a) Sketch the reversible and irreversible cycle on P-v and T-s diagrams showing the heat and work exchanged.

b) For the irreversible cycle, find the net-work, the flow rate producing 10 MW and the entropy generated in compression and expansion.

c) Find the efficiency of the reversible cycle and of the irreversible cycle.

A Brayton cycle working with air has a compression ratio of 6, between a minimum temperature of 30 °C and a maximum temperature of 1200 °C. The iso-entropic efficiency of the compressor is 70% and the isentropic efficiency of the turbine is 80%.

a) Sketch the reversible and irreversible cycle on P-v and T-s diagrams showing the heat and work exchanged.

b) For the irreversible cycle, find the net-work, the flow rate producing 10 MW and the entropy generated in compression and expansion.

c) Find the efficiency of the reversible cycle and of the irreversible cycle.

Added by Michael S.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Sri K

05/11/2022

Step 1

3 * 1200 = 360 °C Using the formula for compression ratio: r = T2 / T1 6 = T2 / 360 T2 = 6 * 360 T2 = 2160 °C Show more…

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A Brayton cycle working with air has a compression ratio of 6, between a minimum temperature of 30 °C and a maximum temperature of 1200 °C. The iso-entropic efficiency of the compressor is 70% and the isentropic efficiency of the turbine is 80%. a) Sketch the reversible and irreversible cycle on P-v and T-s diagrams showing the heat and work exchanged. b) For the irreversible cycle, find the net-work, the flow rate producing 10 MW and the entropy generated in compression and expansion. c) Find the efficiency of the reversible cycle and of the irreversible cycle.