Abstract
Cooling characteristic of a loop thermosyphon is investigated experimentally. The evaporator height and the vapor tube diameter is changed as well as liquid height, and then surface temperature of dummy CPU is measured. The surface temperature is decreased with decrease in liquid height, especially at low liquid height. And more, the larger the evaporator height or the vapor tube diameter is, the lower the surface temperature is. On the other hand, at high liquid height, the effect of the evaporator height and the vapor tube diameter on the surface temperature is not evident.
