A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100 C and leaves at 60 C. A cold fluid enters the heat exchanger at 40 C. The mean temperature difference between the two fluids is

A designer chooses the values of fluid flow rates and specific heats i

1.	A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100 C and leaves at 60 C. A cold fluid enters the heat exchanger at 40 C. The mean temperature difference between the two fluids is
A.	20 C
B.	40 C
C.	60 C
D.	66.7 C
Answer» B. 40 C