Mean Temperature Difference in an Exchanger. A 1-2 exchanger with one shell pass and two tube passes is used to heat a cold fluid from 37.8°C to 121.1°C by using a hot fluid entering at 315.6°C and leaving at 148.9°C. Calculate the ATm and the mean temperature difference AT in K. oala Ans. m ATim 148.9 K, ATm=131.8 K Inrner& Row, Publishers,

The condenser of a large thermal power plant consists of a single body with two passes each and 30000 pipes.It is a shell and tube type heat exchanger. Pipes are 25 mm inner diameter, thin-walled and steam,11000 W / m2With a convection coefficient of .K, it condenses on the outer surfaces of the pipe. HeatThe transfer required by the exchanger is 2000 MW, and 30000 kg / h of water will be transferred from the pipes.as with flowing flow rate. Water enters at a temperature of 20 ° C, steam at 50 ° C.is condensing. Calculation temperature of the cooling water from the condenser? Required per passdetermine the pipe length? The properties of water at Tort = 300 K; Cp = 4180 j / kgK, μ = 855 × 10--6 Ns / m2,k = 0.613 W / mK, Pr = 5.83.