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Optimization design and experimental properties of high-temperature and high-capacity pulse tube cooler
Weifeng DENG, Zhenhua JIANG, Shaoshuai LIU, Ankuo ZHANG, Yinong WU
CIESC Journal    2019, 70 (1): 107-115.   DOI: 10.11949/j.issn.0438-1157.20180307
Abstract   (383 HTML6 PDF(pc) (821KB)(98)  

A high-capacity pulse tube cooler (PTC) with nominal cooling of 50 W/170 K is presented in this paper. It is driven by an opposed-piston dynamic magnetic linear compressor. The regenerator and pulse tube are arranged in coaxial. The inertance tube and reservoir are used as passive phase shifter of the PTC. Based on the principle of electrical-mechanical-acoustic coupling field, a dynamic model of the PTC is proposed and transient simulation was conducted on the characteristics of the compressor under load. The mass-spring system of the compressor is improved to make the PTC resonant. The mass of the PTC is less than 12 kg without electric control equipment. A performance of 50 W/170 K is achieved with 230 W electrical power while the motor efficiency and related Carnot efficiency are 92.7% and 16.5% respectively. The specific power (electrical power/cooling power) is less than 5 W/W at the temperature range of 150—200 K. Under the rated input power, the maximum cooling power reaches 90 W@200 K. The PTC can be used for space to cool down giant Infrared Focal Plane Array (IRFPA) and provide an alternative to domestic refrigerator as cold source at the temperature range of -60—-20℃ as well.


Fig.2 Acoustic impedance diagram of PTC
Extracts from the Article
式(1)动量方程可以描述冷指的惯性项和黏性项,而式(2)描述冷指的容性项和温度引起的体积流率变化项,结合这些热力参数项,能够根据各组件的结构特点,将脉管冷指表示成类似交流电阻抗关系的交变声阻抗图,如图2所示,其中l为单位长度感抗,c为单位长度容抗,rυrκ分别为黏性阻力系数和热阻力系数,g为连续方程中体积流率的增益因子。
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