90° Rotation,How To Install Heatpipe Cooler?
Conclusion:Install Heatpipe Cooler In This Way
As Silverstone says,the case like RV02 is not fit to install TRad series graphics cooler,if we want to get better cooling performance,it should be sure condensation side is higher than evaporation side,which can be applied in the installation principle for all the heatpipe coolers.
The reason why it appears such case lies in that gravity effect of reflow-liquid in heatpipe is obviously beyond our imagination.The cooler like MK-13 is installed vertically,its capillary pressure can’t entirely push reflow-liquid and capillary limit is caused.From another point of view,quality of heatpipes should be improved?Or can capillary pressure which is depended on liquid surface tension coefficient and capillary radius be more higher?
Anyway is gravity effect too big or wick structure is not ideal?
In more professional application fields,CPL(capillary pumped loop) is an effect way to solve small temperature difference and long-distance heat recovery.Compared with ordinary single-phase circuit heatpipe,it has better temperature-control and heat transfer effect,we hope it can be introduced to PC cooling one day.
Page 1: Prerequisite For Running Of Heatpipes
Page 2: TRad Series Graphics Coolers
Page 3: The Way We Test
Page 4: Traditional Graphics Coolers Stages
Page 5: TRad Stream Coolers:Beyond Imagination
Page 6: Conclusion:Install Heatpipe Cooler In This Way
November 25th, 2010 at 12:45 pm
Great technical article but the vertical/horizontal is bit confusing
installing the cooler with the heatpipes vertically improves the cooling performance? your charts are contradictory to your statement, you should fix that.
December 6th, 2010 at 9:26 am
Like Viper said, your graph contradicts your statements. You define “vertical” as the stock orientation of the RV02 on page 2 in your diagram. The “vertical” orientation is better on your results… The page 2 diagram’s definition of vertical and your result’s definition of vertical are not the same.
December 6th, 2010 at 4:53 pm
If you guys go to Thermacore’s site you’d see their heatpipes and vapor chamers can be oriented in any directon and used in a wide variety of applications including aircraft systems, which have no up and down sometimes. It is largely a myth that these are gravity dependant due to wicking structure.
I have an old Asetek VapoChill Micro air cooler, one of the first gen heatpipe coolers with R134 vapor instead instead of water vapor, unfortunately it did not have any wicking and needed to be vertical to work at all.
April 19th, 2011 at 12:08 am
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August 19th, 2011 at 1:02 am
I think the difference is due to fin orientation, not heatpipe performance. I inquired thermalright about heatpipe performance and their testing shows that their heat pipes will perform well with evaporation chamber high, meaning that the wick can indeed overcome gravity.
If fins are vertical, the direction of convection-driven airflow is parallel to the surface of the fins, allowing a larger surface of the fins to come into contact with the cold air, which improves performance (that is why the fins are flat). That is why all heatsinks are designed with air flowing along the surface of the fins. In fanless mode, this has to be orientated in the direction of natural convection to get good performance.
With rotated mounting, the convection airflow is past the edges of the fins, not along the surface which gives less cooling. Airflow is crucial for heatsink performance since the air is a poor heat conductor. Without case fans this would be even more important since the horizontal airflow generated by the case fans in the rotated test probably mitigated the problem a little.
For a GFX heatsink to be suitable for rotated cases, i think the fins have to be orientated so airflow toward the top of the case is parallel to the fin surfaces and meets as little resistance as possible.
August 21st, 2011 at 2:31 pm
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August 31st, 2011 at 3:26 pm
If you’re confused, page two is saying vertical as in the GFX card is verticle, not the chassis. That’s why later they clarify that Vertical RV02 results in Horizontal GPUs.
November 18th, 2011 at 2:25 pm
This is one of the most poorly written articles I’ve ever seen. I hope English is not the author’s first language, or he should be ashamed.
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