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Unformatted text preview: Wnet < 0 for a refrigeration cycle. W net = W1− 2 + W 2 − 3 + W 3 −1 = −85 kJ + 0 kJ + 60 kJ = −25 kJ Therefore, this is a refrigeration cycle. € (c) Determine the heat transfer between states 3 and 1. For this, we can use Qnet = Wnet Name:_______________________________ B W net = Qnet
W net = Q1− 2 + Q2 − 3 + Q3 −1
W net − Q1− 2 − Q2 − 3 = Q3 −1 Q3 −1 = −25 kJ − ( −85 kJ ) − 5 kJ = 55 kJ
(d) Based on your answer to (b), determine either the thermal efficiency η (for a power cycle) or the € coefficient of performance β (for a refrigeration...
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This document was uploaded on 01/30/2014.
 Winter '14

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