Tn

hence, the entropy change in the device is

The inequality is the result of the second law of thermodynamics. However, the thermocouple we are considering is a lossless one (isentropic); thus

Jh Jc and dTAS = 0, because Equation 5.132 holds for any value of T.

i-Th fTu

dTH dTH

Th

= I

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