Case No.3: Loop heat pipe
Cooler Master has developed a loop heat pipe for high heat flux, long-distance transportation and anti-gravity for graphics card application.
The figure below shows how CM loop heat pipe operates. The evaporator receives heat from heat-source, thus working fluid undergoes a phase change and turns into vapor at the internal wick structure surface. The pressure difference pushes vapor to move toward the condenser area, then the condensed working fluid continues moving into the evaporator and completes the transfer loop. The function of the compensation chamber is storing the working fluid.
Loop heat pipe has higher heat transfer capacity and is able to transport large heat load over a long distance, up to 1 to 2 meters with low thermal resistance. More than able to provide reliable operation over a long distance, the anti-gravity ability of loop heat pipes is also an advantage over heat pipes. Also, the flexible heat transport lines offer significant advantages regarding form accommodating the design. Another feature of loop heat pipes is the fact that the wick only exists in the evaporator, which results in low flow resistance.
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