Question 48. How Can One Quickly Estimate The Additional Pressure Drop To Be Introduced With More Tube Passes?
Answer : When the calculated pressure drop inside the tubes is underutilized, the estimated pressure drop with increased number of tube passes is new tube DP = DP x (NPASS/OPASS)3 Where NPASS = New number of tube passes. OPASS = Old number of tube passes this would be a good estimate if advantage is not taken of the increase in heat transfer.
