Water (Cp = 4.18 kJ/kg.K) at 80°C enters a counter flow heat exchange – McqOptions

MCQOPTIONS

1.	Water (Cp = 4.18 kJ/kg.K) at 80°C enters a counter flow heat exchanger with a mass flow rate of 0.5 kg/s. Air (Cp = 1 kJ/kg.K) enters at 30°C with a mass flow rate of 2.09 kg/s. If the effectiveness of the heat exchanger is 0.8, the LMTD (in °C) is
A.	40
B.	20
C.	10
D.	5
Answer» D. 5

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