Question: 4. Explain why the log-mean temperature difference is used in the design of double-pipe heat exchangers. What happens if one uses the algebraic mean instead?

4. Explain why the log-mean temperature difference is used in the

4. Explain why the log-mean temperature difference is used in the design of double-pipe heat exchangers. What happens if one uses the algebraic mean instead? Also, explain the difference between the rating and design modes when heat exchangers are analyzed

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