1. Exhaust gases flowing through a tubular heat exchanger at the rate of 0.3 kg/s are...

 

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1. Exhaust gases flowing through a tubular heat exchanger at the rate of 0.3 kg/s are cooled from 400C to 120C by water initially at 10C. The specific capacities of exhaust gases and water may be taken as 1.13 and 4.19 kJ/kgK respectively, and the overall heat transfer coefficient from gases to water is 140 W/mK. Calculate the surface area required when the cooling water flow rate is 0.4 kg/s: (i) for parallel flow; (ii) for counter flow. 1. Exhaust gases flowing through a tubular heat exchanger at the rate of 0.3 kg/s are cooled from 400C to 120C by water initially at 10C. The specific capacities of exhaust gases and water may be taken as 1.13 and 4.19 kJ/kgK respectively, and the overall heat transfer coefficient from gases to water is 140 W/mK. Calculate the surface area required when the cooling water flow rate is 0.4 kg/s: (i) for parallel flow; (ii) for counter flow.

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To calculate the surface area required for the tubular heat exchanger in both parallel flow and coun... View the full answer