QUESTION Water flows at the rate of
65k(g)/(m)inthrough a double pipe counter flow heat exchanger. Water is heated from
50\deg Cto
75\deg Cby an oil flowing through the tube. The specific heat of the oil is 1.780
k(J)/(k)g.K. The oil enters at
115\deg Cand leaves at
70\deg C. The overall heat transfer coefficient is 340
(W)/(m^(2))K. Calcualte the following (a) Heat exchanger area (b) Heat transfer rate