斯特林型制冷机污染失效的研究进展OA

Stirling type refrigerators are compact,highly reliable,and operate across a broad refrigeration temperature range,making them widely used in cryogenic applications.However,their applications often require strict temperature control or are not maintenance-friendly.Currently,the most significant factor affecting their performance is performance failure caused by working fluid contamination during operation.This paper reviews the research progress on contamination-induced failure in Stirling type refrigerators in China and abroad.It summarizes the results on contaminant species and lifetime tests.The paper focuses on the relationship between performance changes and different contaminants,and on the distribution characteristics of contaminant solids.Gases with high phase transition temperatures,adsorbed on the internal surfaces of the refrigerator,gradually desorb and diffuse during operation.Then they desublimate at the coldest end of the machine,which increases flow resistance and regenerator loss and leads to periodic performance fluctuations.Finally,it points out the mechanisms and parameters that still need to be clarified,and provides guidance for the future development of long-lifespan Stirling type refrigerators.