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Originally Posted by bobo5195
Im not to happy about it. Although this suggests otherwise
http://delphi.com/pdf/techpapers/2000-01-0579.pdf
SD = Q/dt = W/C
dt = water in temp - air in temp
Its applied to car heat cores so its applicable to water cooling. In summary coolant base line temps (in let conditions) are only a small effect but flow rate is very important.
Would do more analysis but have job applications to do.
EDIT: Should note that rads dont have 60kph air inputs and such high flow rates. |
Interestingly that is the very paper Bill uses to introduce the discussion in his first article
Radiator Heat Dissipation Testing
"Discussion of Results
This article is flirting with a thermal characterization known as Specific Dissipation (SD), which is defined as the heat transfer rate of a heat exchanger divided by the maximum temperature difference across the heat exchanger. As I have not the ability to display equations, nor most readers the inclination to view them, those interested in the “theory” are referred to an SAE paper, 2000-01-0579, on “The Effect of Changes in Ambient and Coolant Radiator Inlet Temperatures and Coolant Flowrate on Specific Dissipation” which can be found HERE.
http://www.delphiauto.com/pdf/techpa...00-01-0579.pdf "
Will peruse again, slowly.
Yes, velocity in PC radiators possibly 2.5->25kph(1st guess)