Which of the following factor (can be more than one factor) contribute to deviation of actual gas-turbine cycle from Brayton cycle? Question 7Select one or more:a.pressure drop in hat exchangerb.heat loss in turbinec.heat loss in compressord.friction in pipings
Question
Which of the following factor (can be more than one factor) contribute to deviation of actual gas-turbine cycle from Brayton cycle? Question 7Select one or more:a.pressure drop in hat exchangerb.heat loss in turbinec.heat loss in compressord.friction in pipings
Solution
The factors that contribute to the deviation of the actual gas-turbine cycle from the Brayton cycle include:
a. Pressure drop in heat exchanger: In reality, the pressure drop in the heat exchanger is unavoidable due to the resistance to the flow of the working fluid. This pressure drop reduces the net work output and efficiency of the cycle, causing a deviation from the ideal Brayton cycle.
b. Heat loss in turbine: In an actual gas turbine, not all the heat supplied in the combustion chamber is converted into work. Some of it is lost to the surroundings due to the finite temperature difference, causing a deviation from the ideal cycle.
c. Heat loss in compressor: Similar to the turbine, heat loss also occurs in the compressor. The work input required by the compressor is more than what is predicted by the ideal Brayton cycle due to these losses.
d. Friction in pipings: Friction in the pipings causes a pressure drop, which reduces the net work output and efficiency of the cycle. This is another factor causing a deviation from the ideal Brayton cycle.
So, all of the factors listed (a, b, c, and d) contribute to the deviation of the actual gas-turbine cycle from the Brayton cycle.
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