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I have some problems in resolving this exercise.

Consider a cylindrical heat exchanger, whose you know all caracteristics (such as : inside diameter, outside diameter and its length). This exchanger is used to cool an oil phase with water.

We know the flow of water, its Cp and its temperature, moreover we also know the flow of oil, its Cp and its temperature.

We also know the global transfert coefficient K expressed in kW.m-².K-1

How can we determine the temperature of oil at the exit of the exchanger?

Thank you very much.