Abstract:
A two-phase loop thermosyphon had been experimented with a VIew to cooling
electronic components that dissipate high heat flux. Loop thermosyphon is a device
consisting of an evaporator, condenser, reservoir, two check valves and forward and
return lines connecting the evaporator and condenser. Experiments were conducted to
assess the effects of working fluids and evaporator geometry on the performance of a
two-phase loop thermosyphon. Three different working fluids were used in this study,
namely water, ethanol and methanol. Boiling heat transfer was studied for different
geometry of evaporator surfaces. The evaporator surface temperature, condenser inlet
and outlet temperatures and cycle time were measured at a regular interval of 10 second
in this study for different working fluids.
The experimental results are obtained at different heat input levels which are varied
from 120W to 300W with an increment of 15W for the filling volume of approximately
100%. The temperatures of evaporator surfaces and heat fluxes on the basis of heat
surface area are measured, determined and discussed.
