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Consider a very long, concentric tube heat exchanger having hot and cold water inlet temperatures of...

Question

Consider a very long, concentric tube heat exchanger having hot and cold water inlet temperatures of...

Consider a very long, concentric tube heat exchanger having hot and cold water inlet temperatures of 85 and 15°C. The flow ra

Consider a very long, concentric tube heat exchanger having hot and cold water inlet temperatures of 85 and 15°C. The flow rate of the hot water is twice that of the cold water. Assuming equivalent hot and cold water specific heats, determine the hot water outlet temperature for the following modes of operation: (a) counterflow and (b) parallel flow. (a) Determine the hot water outlet temperature for counterflow operation, in °C. Thy0 = | i °C (b) Determine the hot water outlet temperature for parallel flow operation, in °C. Thy0 = i °C

Answers

For parallel flow operation, the hot and cold outlet temperatures will be equal; that is Tejo Tho hence (Tc,o - Tc, i) = ChlT


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