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9. Show that the thermal efficiency of a combined gas-steam power plant nee can be expressed as nce ngns - N9I, where ng= and ns = and steam cycles, respectively. Using this relation, determine the thermal efficiency of a combined power cycle that consists of a topping gas-turbine cycle with an efficiency of 40 % and a bottoming steam-turbine cycle with an efficiency of 30 % are the thermal efficiencies of the gas Qin Qg,out 10. It can be shown that the thermal efficiency of a combined gas-steam power plant ncc can be ex- pressed in terms of the thermal efficiencies of the gas-turbine and the steam-turbine cycles as ncc = ng + ns - ngns. Prove that the value of ncc is greater than either of ns or ng. That is, the combined cycle is more efficient than either of the gas-turbine or steam-turbine cycles alone -End

9. Show that the thermal efficiency of a combined gas-steam power plant nee can be expressed as nce ngns - N9I, where ng= and ns = and steam cycles, respectively. Using this relation, determine the thermal efficiency of a combined power cycle that consists of a topping gas-turbine cycle with an efficiency of 40 % and a bottoming steam-turbine cycle with an efficiency of 30 % are the thermal efficiencies of the gas Qin Qg,out 10. It can be shown that the thermal efficiency of a combined gas-steam power plant ncc can be ex- pressed in terms of the thermal efficiencies of the gas-turbine and the steam-turbine cycles as ncc = ng + ns - ngns. Prove that the value of ncc is greater than either of ns or ng. That is, the combined cycle is more efficient than either of the gas-turbine or steam-turbine cycles alone -End

Elements Of Electromagnetics
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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9. Show that the thermal efficiency of a combined gas-steam power plant nee can be expressed as nce ngns - N9I, where ng= and ns = and steam cycles, respectively. Using this relation, determine the thermal efficiency of a combined power cycle that consists of a topping gas-turbine cycle with an efficiency of 40 % and a bottoming steam-turbine cycle with an efficiency of 30 % are the thermal efficiencies of the gas Qin Qg,out 10. It can be shown that the thermal efficiency of a combined gas-steam power plant ncc can be ex- pressed in terms of the thermal efficiencies of the gas-turbine and the steam-turbine cycles as ncc = ng + ns - ngns. Prove that the value of ncc is greater than either of ns or ng. That is, the combined cycle is more efficient than either of the gas-turbine or steam-turbine cycles alone -End
Transcribed Image Text:9. Show that the thermal efficiency of a combined gas-steam power plant nee can be expressed as nce ngns - N9I, where ng= and ns = and steam cycles, respectively. Using this relation, determine the thermal efficiency of a combined power cycle that consists of a topping gas-turbine cycle with an efficiency of 40 % and a bottoming steam-turbine cycle with an efficiency of 30 % are the thermal efficiencies of the gas Qin Qg,out 10. It can be shown that the thermal efficiency of a combined gas-steam power plant ncc can be ex- pressed in terms of the thermal efficiencies of the gas-turbine and the steam-turbine cycles as ncc = ng + ns - ngns. Prove that the value of ncc is greater than either of ns or ng. That is, the combined cycle is more efficient than either of the gas-turbine or steam-turbine cycles alone -End
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