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R-134a expands through a throttling device from 900 kPA and 30 oC to -10 oC. a- determine...

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Mechanical Engineering

R-134a expands through a throttling device from 900 kPA and 30oC to -10 oC.
a- determine the entropy generation of this process.
b- the working fluid R-134a, this time expands adiabaticallythrough a low pressure turbine with 90% isentropic efficiency from900 kPa and 30 oC to -10 oC. What is the power generated by thisturbine per unit mass flow rate of R134-a, in kj/kg.

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