Abstract
This thesis has the main purpose that finding a innovated non-phase change of heat pipe, which has the advantage of simple manufacturing process. The study was composed of two main parts. First was the respond test by using infrared rays thermo-image. The aim of this part was to determine the geometry of the non-phase change heat pipe and finding the optimal design model as well. The second of this study was measuring the maximum heat transfer experiment, following the first part of result, using the different carbon dioxide pressure, the different nozzle length of tube which is inside the heat pipe and the circulation type (Nozzle-Type and Diffuser-Type). The experiment results shown the performance of Nozzle-Type was better than that of the Diffuser-Type. Key words：：：：Supercritical pressure、、、、non-phase change heat pipe、、、、heat pipe、、、、nozzle