A gas turbine power plant has an output of 10,000 kW with electrical and mechanical losses of 600 kW. The overall thermal efficiency of the unit is 25 %. The gas turbine exhausts to a waste heat recovery boiler which is 75 % efficient. The steam from the boiler drives a steam turbine-generator which has an overall heat rate of 11,605.62 kJ/kW-hr. Steam turbine unit auxiliaries require 880 kW.Determine:(a) Output of the steam turbine generating unit in kW.(b) The net heat rate in kJ/KW-hr of the combined cycle.(c) Plant thermal efficiency of the steam turbine-generator plant.(d) Overall thermal efficiency. 2. A gas turbine power plant has an output of 10,000 kW with electrical and mechanical lossesof 600 kW. The overall thermal efficiency of the unit is 25 %. The gas turbine exhausts toa waste heat recovery boiler which is 75 % efficient. The steam from the boiler drives asteam turbine-generator which has an overall heat rate of 11,605.62 kJ/kW-hr. Steamturbine unit auxiliaries require 880 kW.Determine:(a) Output of the steam turbine generating unit in kW.(b) The net heat rate in kJ/KW-hr of the combined cycle.(c) Plant thermal efficiency of the steam turbine-generator plant.(d) Overall thermal efficiency.

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Answered: A gas turbine power plant has an output…

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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A gas turbine power plant has an output of 10,000 kW with electrical and mechanical losses
of 600 kW. The overall thermal efficiency of the unit is 25 %. The gas turbine exhausts to
a waste heat recovery boiler which is 75 % efficient. The steam from the boiler drives a
steam turbine-generator which has an overall heat rate of 11,605.62 kJ/kW-hr. Steam
turbine unit auxiliaries require 880 kW.
Determine:
(a) Output of the steam turbine generating unit in kW.
(b) The net heat rate in kJ/KW-hr of the combined cycle.
(c) Plant thermal efficiency of the steam turbine-generator plant.
(d) Overall thermal efficiency.

2. A gas turbine power plant has an output of 10,000 kW with electrical and mechanical losses
of 600 kW. The overall thermal efficiency of the unit is 25 %. The gas turbine exhausts to
a waste heat recovery boiler which is 75 % efficient. The steam from the boiler drives a
steam turbine-generator which has an overall heat rate of 11,605.62 kJ/kW-hr. Steam
turbine unit auxiliaries require 880 kW.
Determine:
(a) Output of the steam turbine generating unit in kW.
(b) The net heat rate in kJ/KW-hr of the combined cycle.
(c) Plant thermal efficiency of the steam turbine-generator plant.
(d) Overall thermal efficiency.

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