Comparing Remote Heat Exchangers for Cooling Circuit

[mickdangerous]

I need to compare two remote heat exchangers (HE) of the cross-flow finned tube air & glykol 37%. The HE vendors provided me with basic stat sheets from factory testing. My issue is that the volumetric flow rates for the factory testing are different from the cooling circuit I have to place the HE in. Is there a practical way for me to determine the performance of these HEs in my cooling circuit? This is a two circuit HE, but my concern is with the high temperature circuit.

Cooling circuit parameters known
temp in
temp out
flow rate
medium
heat to be dissipated
ambient temp = 122F

Heat exchanger parameters known from factory testing
temp in (both sides)
temp out (both sides)
air flow
face velocity
heat exchanged
flow rate
ambient temp = 122F

thank you for your help

 

[anorlunda]

Yes, the equation for heat transferred is

Get the heat transfer coefficient U from the factory test. Then apply it to your conditions. You must be able to compute the LMTD independently.