GATE ME 2014 Set 1 — Question 26
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Thermodynamics → Laws & Properties → Work & Heat in Processes
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Question
In a power plant, water (density = ) is pumped from to . The pump has an isentropic efficiency of . Assuming that the temperature of the water remains the same, the specific work (in kJ/kg) supplied to the pump is
Correct answer
(D) 3.43
Solution
The specific work for an isentropic pump is given by:Given:
Isentropic work:The actual specific work supplied to the pump is:Comparing with the options, the closest value is 3.43.
Isentropic work:The actual specific work supplied to the pump is:Comparing with the options, the closest value is 3.43.
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