Abstract
To make a criterion like heat pipe’s one, this research experiments include the establishment of a system to measure axial thermal resistance and thermal diffusion rate of a vapor chamber. This system uses Visual Basic and PLC controller to test performance of vapor chamber. This research experiments will observe contact resistance and thermal resistance with TJ.Surface for thermal elements which use water jacket for thermal diffusion. Then, the research will improve the accuracy by using different fixtures and discusses values in different conditions. Further, the research will use thermal diffusivity measurement system to test thermal diffusion rate for vapor chamber. Using a water jacket as an example, the lab equipment include a water jacket without flow channel (Type A), a water jacket with flow channel (Type B), a copper block with thermal couples and an aluminum clamp. The research shows that the experiment with an aluminum clamp, Type B water jacket without bakelite and a copper block will get the best performance. Using symmetrical vapor chamber with the best establishment of water jacket experiment shows that thermal resistance is 0.135℃/W, while using non-symmetrical vapor chamber shows that thermal resistance is 0.031℃/W. For thermal diffusion experiment, using a 30X30X14.15mm3 heater as an example, the result shows that the performance of the thermal resistance and surface temperature are better while using a 90X90X14.15 mm3 copper block rather than a 30X30mm2 copper block. The copper block which is 90X90X14.15mm3 can get lower value of thermal resistance and the surface temperature. For thermal diffusion rate, using non-symmetrical vapor chamber shows that thermal diffusion rate for X-coordinate is 16.977 W/m2, which is about fifteen times greater than standard value of copper. Thermal diffusion rate for Y coordinate is 21.852 W/m2, which is about eighteen times greater than the standard value of copper.