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)

A) $$\frac{{{\text{D}}_2^2 - {\text{D}}_1^2}}{{{\text{D}}_1^2}}$$ B) D₂ - D₁ C) $$\frac{{{\text{D}}_2^2 - {\text{D}}_1^2}}{{{\text{D}}_2^2}}$$ D) None of these

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Correct Answer: Option A

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In a double pipe concentric heat exchanger the equivalent diameter of...

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)

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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)