In the heat transfer relation Q = UA s T lm for a heat exchanger, what is

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In the heat transfer relation Q = UAs ΔTlm for a heat exchanger, what is ΔTlm called? How is it calculated for a parallel-flow and counter-flow heat exchanger?

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Fundamentals of Thermal-Fluid Sciences

ISBN: 978-0078027680

5th edition

Authors: Yunus A. Cengel, Robert H. Turner, John M. Cimbala

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