Question

Among the followings, which one is not a consequence of irreversible expansion in a Rankine cycle?
reduction in cycle efficiency
increase in turbine exit quality
increase in pump work
increase in heat rejection at condenser

Answer 1

Answer:

reduction in cycle efficiency

Answer 2

Reduction In Cycle Efficiency is the correct option.

Among the followings, Reduction In Cycle Efficiency is not a consequence of irreversible expansion in a Rankine cycle.

The Rankine cycle is a heat engine constituted of four internally reversible

processes.

Consequences of irreversible expansion in a Rankine cycle are:-

• Turbine:- adiabatic and reversible (isentropic) expansion output: turbine >> pump (increase in turbine exit quality)

• Pump:- adiabatic and reversible (isentropic) compression (Increase in pump work)

• Condenser:- isothermal and isobaric compression qL = heat rejected to low temp reservoir (increase in heat rejection at condenser)

Hence, a Reduction In Cycle Efficiency is not a consequence of irreversible expansion in a Rankine cycle.

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