hydraulic diameter for plate type oil cooler!!

[zzangdol51]

Can any one tell me about the hydraulic diameter for plate type oil cooler

this oil cooler have louvered center(performance
improvements over traditional offser fin designs)

I want methods or relative papers about hydraulic diameter

The cooler picture- rink here.

http://www.delphi.com/pdf/dti/hp_oil_cool.pdf

 

[kmpillai]

Dear friend,
Please refer the following book
"Compact Heat Exchangers" by W M Kays & A L London

Regards,
KMPillai

 

[SRmeister]

Good afternoon zzangdol51:

The computation for hydraulic diameter is simple. However, determining the inputs to the formula may be rather challenging. According to Hesselgreaves in Compact Heat Exchangers: Selection, Design, and Operation, if the hydraulic diameter is dh, the internal (or wetted) volume of the heat exchanger passages is Vs, and the wetted surface area of the heat exchanger passages is As, then the hydraulic diameter is given by the expression: dh=4Vs/As. I hope you will find this helpful.