# Calculation Methods - Plate Exchanger

The calculation method used is based on the correlations and found in Chemical Engineers Handbook - Perry - 5th to 8th Edition [20], p 11-57. The pressure loss is determined from the following equation: ΔP = 2 fD G2 L / (ρ g Dh) + Nozzle Losses. where: G is the mass flux. ρ is the fluid density. L is the height/depth of a single plate corrugation. Dh is the hydraulic diameter. fD is the friction factor (Darcy).