Hello,
It depends on equations that you used. It's difficult to imagine the geometry, compositions, parameters. What Is your plate exchanger intended for?
For instance, I choose M6M (from Alfa Laval) and I know its pressing depth is 3 mm. The Re number equation in plate heat exchanger is :
Re= Rho.Vchannel.De/mu
When I calculate Re and take 2b as equivalent diameter, the answer is far from the result shown. So I changed the way I solve the problem.
First, I divided calculate Re to HTFS Re; Recalculated/ReHTFS >1, and I thought maybe it considers enlargement factor. In other words it uses Dh in Re equation, and Dh in plate heat exchanger is (2.b)/enlargement factor. There are some correlations for calculating this factor. But, it is true for one plate type and for another model like M10M (Alfa Laval), it has great error. What's your opinion?
Edited by Mina_4, 20 May 2017 - 10:30 PM.