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Asked by manvirsingh2242 | 11 Jun, 2022, 09:16: AM
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At state-1 , we have , P1 V1 = n R TH  ............................. (1)
 
where P is pressure, V is volume, n is number of moles, R is universal gas constant and TH is source temperature
 
At state-4 , we have , P4 V4 = n R TL ...........................(2)
 
Where TL is sink temperature
 
By dividing eqn.(1) by eqn.(2), we get
 
( P1 / P4 ) ( V1 / V4 )  = TH / TL
 
We are given that   ( P1 / P4 ) = 2  and ( V1 / V4 )  = 1/3
 
Hence , we get , TH / TL  = 2/3
 
actually we should get , TH / TL  > 1  because source temperature is greater than sink temperature.
 
Hence the given pressure ratio is wrong , it shoud be greater than 3
 
Efficiency η = 1 - ( TL / TH )
Answered by Thiyagarajan K | 11 Jun, 2022, 03:44: PM
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