calculate the length of the heat exchanger required to achieve the desired heating.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A water-to-water double pipe heat exchanger is required to cool down 4200 kg/h hot process water from 120°C to 80°C. Available for this purpose is 3800 kg/h cold water at 30°C. The inner pipe inside diameter is 2.7 cm while outside diameter of the inner pipe is 3.3 cm. If the overall heat transfer coefficient is 580 W/(m2·K), calculate the length of the heat exchanger required to achieve the desired heating. Use heat capacity of water as 4.2 J/(g·K) for both streams.

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