Plate Heat Exchanger Pressure Drop Calculator
Model gasketed plate heat exchanger (PHE) hydraulics: calculate channel velocity, Reynolds number, chevron corrugation friction factors, and line pressure drop.
Fluid Flow & Physical Properties
Plate Pack Geometry & Chevron Angle
Hydraulic Results
Hydraulic Breakdown
Hydraulic Sizing Recommendation
Recommended Tools & Equipment
Tested hardware and components for high reliability
Frequently Asked Questions
Why do plate heat exchangers produce turbulence at much lower Reynolds numbers than pipes?
In a straight circular pipe, laminar flow persists up to Re ~ 2,300. In a plate heat exchanger, the crisscrossing chevron corrugations force the fluid to continuously split, recombine, and change direction, inducing intense micro-turbulence at Reynolds numbers as low as Re = 30 to 50.
What is the difference between High-Theta and Low-Theta plates?
High-theta plates have obtuse chevron angles (~60° relative to vertical flow). They force fluid across deep corrugations, yielding exceptional heat transfer coefficients at the expense of high pressure drop. Low-theta plates (~30°) allow fluid to travel straighter with minimal pressure drop but lower thermal efficiency.
Why must port pressure drop be separated from channel pressure drop?
Fluid entering through the round inlet port nozzle experiences acceleration and contraction losses. If port velocity exceeds 15 to 20 ft/s (4.5 to 6 m/s), port friction causes severe maldistribution where the first few plates starve while tail plates receive excess flow.
What is wall shear stress and why does it prevent PHE fouling?
Wall shear stress is the scrubbing friction exerted by turbulent fluid against the stainless steel plate surface. Maintaining channel velocity between 1.0 and 2.5 ft/s (0.3 to 0.8 m/s) provides enough hydraulic scrubbing action to prevent biological slime and calcium scale from adhering.