Abstract
The advantage of avoiding using wick structure inside the heat pipe, researchers start to study and burrow inside a new technology of pulsating heat pipe. While improving the startup problem of horizontal pulsating heat pipe, this new passive component brings up a great potential and a wide range of heat transfer study. In this paper, using Computer Numerical Control(CNC) machine to process a closed water loop system with throat and nozzle design to increase the oscillating ability inside the water loop. First design a small size test PHP plate(200×150×7), find the appropriate filling ratio due to the result of ice cube melting speed, then design a Model Large PHP Plate(320×200×7) to compare the ice cube melting speed with commercial made High Efficiency Plate. Through experiment the ice cube melting speed of Model Large PHP Plate is 0.0818g/s, faster than Commercial Made High Efficiency Plate, which is 0.04413g/s. By testing the thermal diffusivity of Model Large PHP Plate, the thermal diffusivity is αx=2.200749 cm2/s in it’s actuation direction, higher than the same material of Aluminum which is α=0.98cm2/s. . Keywords: Flat-Plate Closed-Loop Pulsating Heat Pipes、Thermal Spreading Resistance、Angstrom method、Spreading thermal conductivity