GATE ME 2021 Set 1 — Question 55
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Thermodynamics → Power Cycles → Rankine, Reheat & Regenerative
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Question
Consider a steam power plant operating on an ideal reheat Rankine cycle. The work input to the pump is . The work output from the high pressure turbine is . The work output from the low pressure turbine is . The thermal efficiency of the cycle is . The enthalpy of saturated liquid and saturated vapour at condenser pressure are and , respectively. The quality of steam at the exit of the low pressure turbine is ________ % (round off to the nearest integer).
Correct answer
92 to 96
Solution
1.Calculate the net work output:
2.Use thermal efficiency to find heat input:
3.Find heat rejected in the condenser:
4.The heat rejected is also given by :
5.Calculate the quality () at the exit:
In percentage, the quality is .Continue learning with Success Tracker
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