5144Chemical EngineeringMedium
In a double pipe (concentric) heat exchanger, the hydraulic radius for heat transfer (for a fluid flowing through the annulus) would be________?
ALess than that for fluid flow
BMore than that for fluid flow
CD2 – D1 (D1 and D2 are I.D. of inner and outer pipes respectively)
DSame as that for fluid flow
Correct answer
B. More than that for fluid flow
Explanation
The correct answer is More than that for fluid flow.