HEAT PIPE PERFORMANCE WITH VARYING WORKING FLUIDS AND FILL PROPORTIONS

Abstract

Miniature heat pipes of 5 mm in diameter and 150 mm in length with a 10 W thermal capacity
are designed, fabricated, and tested. Different thermal loads were used in experiments to evaluate heat pipe
performance with and without working fluid. Common solvents including water, methanol, and acetone
were utilized in the experiment. Thermocouples were used to record the temperature profile throughout the
length of the heat pipe. Thermal resistance and the total heat transfer coefficient were used to measure the
heat pipe's effectiveness. It was found that the performance characteristics changed depending on the
quantity of liquid stocked. Finally, the optimal liquid fill ratio is determined in terms of reduced temperature
differential, increased heat transfer coefficient, and decreased thermal resistance. Researchers in this area
will benefit greatly from having access to this study's published data. The Miniature heat pipe has its highest
overall heat transfer coefficient while using acetone as the working fluid.