Consider a steady-flow ideal Carnot cycle, using steam as the working fluid, in which the high-temperature, constant-pressure heat-addition process starts with a saturated liquid and ends with a saturated vapor. 

A. Plot this cycle in T–s coordinates showing the steam dome.

B. Calculate the thermal efficiency for this cycle if the pressure of the high temperature steam is 6 MPa and the low-temperature heat-rejection process occurs at 300 K. Calculate the values of the quality at the beginning and end of the heat-rejection process.

C. Explain why it is difficult to operate a practical steam power plant on the ideal Carnot cycle of part A.

Transcribed Image Text:

Saturated liquid (P = 6 MPa) Win Он OL Saturated vapor (P = 6 MPa) W out TL = 300 K