Reconsider Prob. 22–62. Using an appropriate software, investigate the effect of the mass flow rate of water on the rate of heat transfer and the tubeside surface area. Let the mass flow rate vary from 0.4 kg/s to 2.2 kg/s. Plot the rate of heat transfer and the surface area as a function of the mass flow rate and discuss the results.

Reconsider Prob.

A shell-and-tube heat exchanger with 2-shell passes and 12-tube passes is used to heat water (c_p = 4180 J/kg·K) with ethylene glycol (c_p = 2680 J/kg·K). Water enters the tubes at 22°C at a rate of 0.8 kg/s and leaves at 70°C. Ethylene glycol enters the shell at 110°C and leaves at 60°C. If the overall heat transfer coefficient based on the tube side is 280 W/m²·K, determine the rate of heat transfer and the heat transfer surface area on the tube side.