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Study on a 5.0 W/80 K single stage Stirling type pulse tube cryocooler

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第9期9卷 1277-1282页

作者： Zhi-hua GAN Guo-jun LIU Ying-zhe WO Qiang CAO Li-min QIU Guo-bang CHEN J.M. PFOTENHAUER Cryogenics Laboratory Institute of Refrigeration and Cryogenics School of Mechanical and Energy Engineering Zhejiang University Hanghzou 310027 China Cryogenic Engineering Laboratory University of Wisconsin-Madison Madison WI 53706 USA

A single stage Stifling pulse tube cryocooler was designed based on REGEN 3.2 and fabricated for testing. The experimental results show that the cooler can provide a cooling capacity of 5.0 W at 79.1 K, and produce a no-load temperature of 57.0 K, operating with an average pressure of 2.50 MPa and a frequency of 60 Hz, performance results that are very close to the calculated values. The cryocooler can be cooled from room temperature to 80 K in 8.5 min. The fast cooldown time is a result of the small regenerator.

关键词： Cryocooler Regenerator High frequency pulse tube

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Theoretical Analyses and Design of a 4 K Gas-Coupled Multi-Bypass Stirling-Type pulse tube Cryocooler

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Journal of Thermal Science 2022年第6期31卷 2077-2087页

作者： LIU Xuming YANG Biao CHEN Liubiao WANG Junjie ZHOU Yuan Chinese Academy of Sciences Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryBeijing 100190China University of the Chinese Academy of Sciences Beijing 100049China

Gas-coupled Stirling-type pulse tube cryocooler(SPTC) is currently the most compact and simplest configuration among all types of cryocoolers, but it is challenging to achieve a very low temperature. This paper investigates a gas-coupled SPTC which is capable of directly achieving a temperature of around 4 K. Theoretical analyses were performed based on SAGE to study the effects of employing one or more multi-bypass structures on apparent cooling performance, and internal working parameters. The simulation results indicate that the function of the multi-bypass is similar to that of a multi-stage gas-coupled structure, producing a pre-cooling effect on the lower-temperature section by increasing the acoustic power and the enthalpy flow in the pulse tube of the higher-temperature section. The cooperation of two multi-bypass structures can promote a higher enhancement of the cooling performance, but it is difficult to achieve the same cooling performance of a completely multi-stage gas-coupled SPTC due to weak phase-shifting capability and excessive reduction of the mass flow. Based on the model, the developed prototype has achieved a no-load temperature of 4.4 K, which shows the great potential of using a gas-coupled SPTC to obtain a cooling temperature below 4 K.

关键词： gas-coupled multi-bypass stirling-type pulse tube cryocooler

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High Temperature Dependence of a pulse tube Engine

High Temperature Dependence of a Pulse Tube Engine

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2014中国汽车工程学会年会

作者： Zhu Shaowei School of Mechanical Engineering Tongji University

ISBN: (纸本)9783662450420

A pulse tube engine which has no any moving part at high temperature is a new type heat engine to generate power by using *** is a reverse of pulse tube refrigerator which already uses in space as a high reliable sensor *** is a potential new method to generate power or cooling power by using car waste *** temperature dependence is investigated by a numerical simulation which shows that its swept volume ratio of displacer over expand and the phase angle difference between displacer and expander is almost no change with temperature change,which is very convenient for controlling of the engine when high temperature is changed which is common in the car.

关键词： pulse tube regenerator engine refrigerator waste heat linear motor

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Gas Flow in Unilateral Opening pulse tubes Based on Real Gas Equation of State

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Chinese Journal of Chemical Engineering 2009年第6期17卷 914-918页

作者：代玉强胡大鹏邹久朋赵家权 School of Chemical Engineering Dalian University of Technology Dalian 116012 China

The real gas effect is dominant at high pressure and low temperature, and it is modeled by complex equations of state other than perfect gas law. In the vicinity of liquid-vapor critical point, the real gas exhibits unusual gas dynamic behavior. In the present work, a transient wave fields in unilateral opening pulse tube is simulated by solving the Navier-Stokes equations incorporated with the Peng-Robinson thermodynamic model. The computational fluid dynamics （CFD） results show a remarkable deviation between perfect gas model and real gas model for contact interface and shockwave. The wave diagram based on the real gas model can help to solve the problem of offset design point.

关键词： real gas flow pulse tube expansion refrigeration unsteady flow

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