An Actual Reheat Cycle with one-stage reheating is executed with steam expanding initially from the throttle at 8 MPa and 485°C. The steam enters a Reheater at 1.425 MPa, 305°C. The steam leaves the reheater at 485°C with a pressure drop of 425 kPa. The steam leaves the Turbine at 35°C after 2nd expansion with 95%quality. The condensate is subcooled by 20°. Turbine mechanical efficiency, 78%; Generator output 40MW at 92% efficiency.

An Actual Reheat Cycle with one-stage reheating is executed with steam expanding initially from the throttle at 8 MPa and 485°C. The steam enters a Reheater at 1.425 MPa, 305°C. The steam leaves the reheater at 485°C with a pressure drop of 425 kPa. The steam leaves the Turbine at 35°C after 2nd expansion with 95%quality. The condensate is subcooled by 20°. Turbine mechanical efficiency, 78%; Generator output 40MW at 92% efficiency.

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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Question

Problem Using Separate Reheater
An Actual Reheat Cycle with one-stage reheating is executed with steam expanding initially from the throttle at 8 MPa
and 485°C. The steam enters a Reheater at 1.425 MPa, 305°C. The steam leaves the reheater at 485°C_with a pressure
drop of 425 kPa. The steam leaves the Turbine at 35°C after 2nd expansion with 95%quality. The condensate is subcooled
by 20°. Turbine mechanical efficiency, 78%; Generator output 40MW at 92% efficiency.
Determine
For Actual cycle
(a) Thermal efficiency in %
(b) Steam rate in kg/kwh
(c) Heat rate in kJ/kwh
For Actual Engine
(d) Indicated engine efficiency in %
(e) Brake engine efficiency in %
(f) Combined engine efficiency in %
(g) mass flow of steam in kg/h

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