A shell and tube heat exchanger with one shell pass and four tube passes is being analyzed to determine the heat transfer rate and the fluid outlet temperatures for prescribed flow rates and inlet temperatures. The cold fluid has a heat capacity rate of 4,200 W/K while the hotter fluid has a heat capacity rate of 2,100 W/K. The inlet temperatures are 50°C for the cold fluid and 150°C for the hot fluid. The number of transfer units is 3.5.
Assuming that the specific heat for the cold fluid is 4.2 kJ/(kg*K) and that the specific heat for the hotter fluid is 1.0 kJ/(kg*K), determine the mass flow rates for the hot and cold fluids.
Determine the actual heat transfer rate.