HomeEngineeringIn a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D1 and D2 are I.D. of inner and outer pipes) 4327. In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D1 and D2 are I.D. of inner and outer pipes)By Admin / September 7, 2025 D2 – D1 none of these ✅ The correct answer is option A.
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