In a counter-flow heat exchanger, cold fluid enters at 30°C and leave – McqOptions

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1.	In a counter-flow heat exchanger, cold fluid enters at 30°C and leaves at 50°C, whereas the hot fluid enters at 150°C and leaves at 130°C. The mean temperature difference for this case is
A.	20 °C
B.	80 °C
C.	100 °C
D.	120 °C
Answer» D. 120 °C

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