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GATE ME 2020 Set 1 — Question 35

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NAT+1 / -0EasyParallel, Counter & Cross FlowHeat ExchangersHeat TransferLMTD Method

Heat Transfer → Heat Exchangers → LMTD Method

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Question

In a concentric tube counter-flow heat exchanger, hot oil enters at 102∘C102^\circ C and leaves at 65∘C65^\circ C. Cold water enters at 25∘C25^\circ C and leaves at 42∘C42^\circ C. The log mean temperature difference (LMTD) is ________ ∘C^\circ C (round off to one decimal place).
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