Cryocoolers are critical components in space missions, providing the necessary cooling to maintain the functionality of sensitive instruments operating at cryogenic temperatures, such as superconducting devices and infrared detectors. This paper explores the design and application of Stirling and Stirling pulse tube cryocoolers (SPTCs) for spaceflight, emphasizing the trade-offs between...
With the advancement of deep cryogenic detection technology, spacecraft are required to operate at a background temperature of 100 K or lower, necessitating the use of pulse tube cryocooler as a critical support component. Traditionally, the compressor and hot-end heat exchanger of pulse tube cryocooler function at an ambient temperature of 300 K. Multi-stage pulse tube cryocooler typically...
As the fundamental component of the pulse tube cryocooler, the functionality of the regenerator exerts a direct influence on the overall performance of the cryocooler. In the design of a pulse tube cryocooler, two principal structural options for the regenerator are available, contingent on the specific requirements. One option is a non-variable cross-section structure, while the other is a...
An infrared detector represents a crucial instrument for human exploration of the universe. The pulse tube cryocooler is a widely utilized technology for the cooling of various types of infrared detectors. At present, the development of pulse tube cryocoolers, which can operate at lower temperatures and have higher cooling capacity, has become an important development direction in this field....
With the rapid development of space technology, the demand for 20K thermal-coupled two-stage pulse tube cryocoolers (PTC) for space infrared detection equipment is increasing. The entire machine is composed of two parts: compressor and cryocooler, so the coupling characteristics of compressor and cryocooler have a serious impact on the performance of the entire machine. In this paper, the...
Currently, most high-precision infrared detectors used in space operate in the liquid hydrogen temperature range and require a two-stage pulse tube cryocooler (PTC) to provide a cryogenic environment. However, the existing two-stage thermal-coupled PTC suffer from low cooling capacity and efficiency. Therefore, in this study, the 2nd-stage of the PTC is considered as a whole system and a Sage...
The Stirling type pulse tube cryocooler (SPTC) eliminates moving parts at the cold end and is driven by a linear compressor at the hot end, thus offering the advantages of low vibration at both ends, high reliability, and long service life, which makes it attractive for various special fields, such as the space field.In practice, there is an increasing interest in providing cooling power at...
Phase shifters (inertance tubes and reservoirs) can perform the function of maintaining a proper phase relationship between pressure and mass flow rate. Although many theoretical models of phase shifters have been proposed in previous studies, it is not clear how the parameters of the phase shifters affect the compressor characteristics of pulse tube cryocoolers. How the inertance tubes and...
The development of the 3rd generation infrared technology enables the pulse tube cryocoolers to become lighter, smaller and more efficient. The phase shifter has a significant effect on the performance of the cryocooler. Moreover, as the weight of the compressor and the cold finger decreases, the phase shifter, especially the reservoir increases its weight ratio in the whole pulse tube...
