An S-T exchanger is designed to exchange heat between two process streams. The T-Q diagram is shown in Figure E20.16. The inside and outside heat transfer coefficients are equal (h_i = h_o = 1000 W/m²/K). If the shell-side fluid flow rate is increased by 25% and the tube-side flow and the temperatures of both streams entering the heat exchanger remain unchanged, calculate

Figure E20.16

The outlet temperatures of both streams assuming that the service is nonfouling and that the tube wall is thin and offers negligible heat transfer resistance.

The outlet temperatures of both streams assuming that the service is nonfouling and the tubes are 1-in, 14-BWG and made of copper.

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200°C 70°C Design Case (Case 1) Shell Tube 80°C 40°C 200°C tout,2 New Case (Case 2) Shell Tube Tout,2 40°C