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You are tasked with designing a heat exchanger to cool 15 kg/s process water from 50 °Cto 30 °C using 25 kg/s of cold seawater with an inlet temperature of 10 °C. (a) What will be the outlet temperature of the seawater? (b) If the selected heat exchanger is a shell-and-tube, with one shell pass and four tube passes, what will the value of UA be? (c) If the number of shell passes is increased while keeping the same 4 tube passes per shell pass, how will that affect UA? Plot UA vs the number of shell passes.

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