Heat Exchangers Problem Related to Double Pipe Heat Exchanger LMTD Method Problem 2

Описание к видео Heat Exchangers Problem Related to Double Pipe Heat Exchanger LMTD Method Problem 2

A counter flow concentric tube heat exchanger is used to cool engine oil (c = 2130 J/kg K) from 160°C to 60°C with water, available at 25°C as the cooling medium. The flow rate of cooling water through the inner tube of 0.5 m diameter is 2 kg/s while the flow rate of oil through the outer annulus O.D. = 0.7 m is also 2 kg/s. If the value of the overall heat transfer coefficient is 250 W/m²K, how long must the heat exchanger be to meet its cooling requirement?

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