Abstract: Semiconductor refrigeration technology is one green refrigeration technology,and high effective heat rejection is one important technology of semiconductor refrigeration, which will largely affect the cooling performance . Phase change heat exchanger is the most efficient method among all the heat rejection methods. Therefore, based on the thermo syphon phase change heat pipe technique, a new heat rejecter is developed. This paper models the rejecter with CFD software Fluent,and the results are validated by the tests on one semiconductor refrigerator, which shows the designed heat rejecter has good heat rejection performance.

Key words: Semiconductor refrigeration, Phase change heat rejection, Thermo syphon