A reheat-regenerative Rankine cycle, producing 250 MW, has two feedwater heaters, a closed one for the first turbine extraction and an open one for the second turbine extraction. When a fraction steam is extracted for the first stage of feed heating, the remainder is reheated to 450°C. Steam enters the turbine at 7.5 MPa and 500°C and expands to 1500 kPa, where the first extraction stage occurs. The remaining steam expands to 500 kPa, where the second extraction stage occurs. The remainder expands through the turbine and exhausts at 7.5 kPa. The closed feedwater heater drains through a trap to the open heater. Determine: (a) the cycle thermal efficiency; (b) the steam flow rate entering the turbine; (c) the steam flow rate to each of the heaters.

A reheat-regenerative Rankine cycle, producing 250 MW, has two feedwater heaters, a closed one for the first turbine extraction and an open one for the second turbine extraction. When a fraction steam is extracted for the first stage of feed heating, the remainder is reheated to 450°C. Steam enters the turbine at 7.5 MPa and 500°C and expands to 1500 kPa, where the first extraction stage occurs. The remaining steam expands to 500 kPa, where the second extraction stage occurs. The remainder expands through the turbine and exhausts at 7.5 kPa. The closed feedwater heater drains through a trap to the open heater. Determine: (a) the cycle thermal efficiency; (b) the steam flow rate entering the turbine; (c) the steam flow rate to each of the heaters.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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