Measuring Heatpipe Efficiency

Cooling
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ESTABLISHING REFERENCE VALUES

Now that I had a test-bed, I set about making measurements using the Thermaltake Pipe101 as the reference HSF. These would become the reference values for comparing the heatpipe results against.

CPU Simulator Reference Data: Thermaltake Pipe 101
Fan
Sound
Heat
Max Temp.
Ambient
Temp. Rise
°C / W
12V
Loud
59W
32.5°C
19°C
13.5°C
0.2288
5V
Very quiet
59W
43.5°C
19°C
24.5°C
0.4153
Notes: Arctic Silver 5 TIM was used at the heatsink / simulator interface. Temperatures were recorded after the simulations had run for 48 hours

The values in the right columns are the most important, as they are the temperature rise above ambient and the resulting calculated cooling capacity (°C/Watt). As can be seen, with the fan at 12V we have a temperature rise of 13.5 °C, and a rise of 24.5°C with the fan at 5V. So with these reference temps I now had something to compare the effectiveness of the Borg heatpipes against.

BORG HES 4-PIPE SYSTEM

Previously I had ordered a Borg 6mm HES (Heatpipe Extension Set) kit:


mCubed Borg 6mm heatpipe extension set

THE REAL TEST

It was now time to configure the test-bed to utilise these mCubed Borg heatpipes. I added another mount system using aluminium channel. The channel was cut and drilled to function as a bracket to hold the plates against the heat/cooling sources. To insulate the plates from the channel I used cardboard squares, quite remarkably these proved to be very effective insulators (the brackets did not heat-up at all).

I used the supplied mCubed heat-transfer compound for coupling the pipes to the heat-plates, and Arctic-5 for coupling the plates to the CPU Simulator and Pipe-101 HSF.


mCubed heatpipes set up with heating and cooling blocks (evaporator and condensor).

And then the HSF was bolted on tightly, completing this configuration:


The Thermaltake HSF was used again.



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