for the exit temperature of the cold fluid to be greater than the exit temperature of the hot fluid when both fluids are single phase fluids. What is your response? Explain. (15p)
2. In a refrigerating plant water is cooled from 20°C to 7°C by brine solution entering at -2°C and leaving at 3°C. The desired heat transfer is 5500 W and the overall heat transfer coefficient is 800 W/m² K. What area required when using a shell and tube heat exchanger with the water making one shell pass and the brine making two tube passes? (30p)