1. The gas-turbine portion of a combined gas-steam power plant has a pressure ratio of 16. Air enters the com- pressor at 300 K at a rate of 14 kg/s and is heated to 1500 K in the combustion chamber. The combustion gases leaving the gas turbine are used to heat the steam to 400°C at 10 MPa in a heat exchanger. The combustion gases leave the heat exchanger at 420 K. The steam leaving the turbine is condensed at 15 kPa. Assuming all the compression and expansion processes to be isentropic, determine (a) the mass flow rate of the steam, (b) the thermal efficiency of the combined cycle. For air, assume Cp of air = 1.005 KJ/kg K, and k (isentropic) = 1.4

1. The gas-turbine portion of a combined gas-steam power plant has a pressure ratio of 16. Air enters the com- pressor at 300 K at a rate of 14 kg/s and is heated to 1500 K in the combustion chamber. The combustion gases leaving the gas turbine are used to heat the steam to 400°C at 10 MPa in a heat exchanger. The combustion gases leave the heat exchanger at 420 K. The steam leaving the turbine is condensed at 15 kPa. Assuming all the compression and expansion processes to be isentropic, determine (a) the mass flow rate of the steam, (b) the thermal efficiency of the combined cycle. For air, assume Cp of air = 1.005 KJ/kg K, and k (isentropic) = 1.4

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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