QUESTION Water flows at the rate of
65k(g)/(m)in
through a double pipe counter flow heat exchanger. Water is heated from
50\deg C
to
75\deg C
by 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 C
and 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