A cyclic machine, shown in Fig. P5.56, receives 300 kJ from a 1000-K energy reservoir. It rejects 120 kJ to a 400-K energy reservoir, and the cycle produces 180 kJ of work as output. Is this cycle reversible, irreversible, or impossible? TH= 1000 K ☺ Cyclic machine Qu= 300 kJ गु. T₁ = 400 K Figure P5.56 W = 180 kJ Q₁ = 120 kJ Consider the previous problem and assume the temperatures and heat input are as given. If the actual machine has an efficiency that is half that of the corresponding Carnot cycle, find the work out and the rejected heat transfer.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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A cyclic machine, shown in Fig. P5.56, receives
300 kJ from a 1000-K energy reservoir. It rejects
120 kJ to a 400-K energy reservoir, and the cycle
produces 180 kJ of work as output. Is this cycle Fi
reversible, irreversible, or impossible?
TH = 1000 K
Qn = 300 kJ
Cyclic
machine
W= 180 kJ
QL = 120 kJ
T = 400 K
Figure P5.56
Consider the previous problem and assume the
temperatures and heat input are as given. If the
actual machine has an efficiency that is half that
of the corresponding Carnot cycle, find the work
out and the rejected heat transfer.
Transcribed Image Text:A cyclic machine, shown in Fig. P5.56, receives 300 kJ from a 1000-K energy reservoir. It rejects 120 kJ to a 400-K energy reservoir, and the cycle produces 180 kJ of work as output. Is this cycle Fi reversible, irreversible, or impossible? TH = 1000 K Qn = 300 kJ Cyclic machine W= 180 kJ QL = 120 kJ T = 400 K Figure P5.56 Consider the previous problem and assume the temperatures and heat input are as given. If the actual machine has an efficiency that is half that of the corresponding Carnot cycle, find the work out and the rejected heat transfer.
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