I referred to few articles and catalogs for plate heat exchanger and most of the velocity through the plate (plate hydraulic slots/opening) is between 0.5 m/s to 3 m/s. Anyway know how this velocity is calculated? From my understanding when the fluid enters the inlet port, let say at 3 m/s then when it enters the slots between the plate it should be higher isn't it? I mean referring to continuity equation when fluid goes from higher area to lower area the velocity would increase but for this case it gets higher, any experts could advise this phenomenon?
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