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What is the correct answer?
4
In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.
A.
20
B.
60
C.
120
D.
∞
Correct Answer :
D. ∞
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