In Rankine cycle the work output from the turbine is given by

        

MCQ  

In Rankine cycle the work output from the turbine is given by............




Options 

A) Change in temperature(T) between inlet and outlet. 

B) Change in pressure(P) difference between inlet and outlet.

C) Change in Internal energy (U) difference between inlet and outlet. 

D) Change in Enthalpy (h) difference between inlet and outlet 


Correct answer : option D ( solution discussed below)



Solution

In rankine cycle two isobaric (constant pressure) process and two isentropic (constant entropy) process.

In Rankine cycle turbine is workdone at constant entropy process but that time enthalpy has been changed.  This change in enthalpy is work output (workdone) of turbine. 
So, 

  Work output from turbine 
     = enthalpy difference between inlet and outlet 
       = h1 - h2    

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