In a gas turbine the compressor takes in air at a temperature of 15°C and compresses it to four times the initial pressure with an isentropic efficiency of 82%. The air is then passes through a heat exchanger heated by the turbine exhaust before reaching the combustion chamber. In the heat exchanger 78% of the available heat is given to the air. The maximum temperature after constant pressure combustion is 600°C, and the efficiency of the turbine is 70%. Neglecting all losses except those mentioned, and assuming the working
In a gas turbine the compressor takes in air at a temperature of 15°C and compresses it to four times the initial pressure with an isentropic efficiency of 82%. The air is then passes through a heat exchanger heated by the turbine exhaust before reaching the combustion chamber. In the heat exchanger 78% of the available heat is given to the air. The maximum temperature after constant pressure combustion is 600°C, and the efficiency of the turbine is 70%. Neglecting all losses except those mentioned, and assuming the working
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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Heat Exchanger
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Question
Transcribed Image Text:In a gas turbine the compressor
takes in air at a temperature of 15°C
and compresses it to four times the
initial pressure with an isentropic
efficiency of 82%. The air is then
passes through a heat exchanger
heated by the turbine exhaust before
reaching the combustion chamber.
In the heat exchanger 78% of the
available heat is given to the air. The
maximum temperature after constant
pressure combustion is 600°C, and
the efficiency of the turbine is 70%.
Neglecting all losses except those
mentioned, and assuming the working
fluid throughout the cycle to have the
characteristic of air find the efficiency
of the cycle. Assume R-0.287 kJ/kg K.
and y - 1.4 for air and constant specific
heats throughout 11.77. wnet. 29.2 Kg/
kg.
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