Conveners
C1OrG - Pulse Tube Components
- Jeff Olson (University of Wisconsin Eau Claire)
- Philip Spoor (Chart Industries)
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Tao Fang (Georgia Institute of Technology)10/07/2017, 16:00Contributed Oral Presentation
Minor geometric features and imperfections are commonly introduced into the basic design of multi-component systems in order to simplify or reduce the expense of manufacturing. In this work, detailed 3D Computational Fluid Dynamic (CFD) models were used to investigate the impact of such apparently minor geometric imperfections on the performance of Stirling type pulse tube cryocoolers. A...
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Mr Sergey Sobol (Technion - Israel Institute of Technology)10/07/2017, 16:15Contributed Oral Presentation
A novel type of PZT-based compressor operating at mechanical resonance, suitable for pneumatically-driven Stirling-type cryocoolers, was presented at CEC-ICMC 2015. The detailed concept, analytical model and the test results on the preliminary prototype were reported earlier and presented at ICC17. Despite some mismatch between the impedances and insufficient structural stiffness, this...
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Mr Xiaokuan You (Institution of Refrigeration and Cryogenics, Zhejiang University)10/07/2017, 16:30Contributed Oral Presentation
High capacity Stirling-type pulse tube cryocooler (PTC) has promising application in high temperature superconductor cooling and gas liquefaction. However, with the increase of cooling capacity, its performance deviates much from that simulation by well-accepted one-dimensional model, such as Sage and Regen, mainly due to the strong field nonuniformity. In this study, several flow...
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Dr Shaoshuai Liu (Shanghai Institute of Technical Physics of Chinese Academy of Science)10/07/2017, 17:00Contributed Oral Presentation
An inertance tube is widely used to provide appropriate impedance at the warm end of the pulse tube in pulse tube refrigerator (PTR). The inertance tube is usually coiled around the outer surface of a linear compressor or in a reservoir to reduce installation space, which affect the cooling performance. The materials of the inertance tube would also influence the pressure drop of the helium...
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Mr Qinyu Zhao10/07/2017, 17:15Contributed Oral Presentation
By using a well-designed transmission tube to recover the dissipated acoustic power at the hot end of the former PTC, the efficiency of the multi-stage cascade PTC is capable to approach Carnot efficiency. Based on this theory, a third pulse tube cryocooler (PTC) was connected in series with the existing two-stage cascade PTC. Experiments showed that the cooling power of the three-stage...
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Xiaomin Pang (Key Laboratory of Cryogenics, Chinese Academy of Sciences)10/07/2017, 17:30Oral Presentation
Multi-stage pulse tube cooler normally uses U-type configuration. For compactness, it is attractive to build a completely co-axial multi-stage pulse tube cooler. In this way, annular shape pulse tube is inevitable. Although there are a few reports about annular pulse tube used in a cooler system, a detailed study and comparison with a circular pulse tube is lacking. In this paper, a numeric...
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Prof. Shaowei Zhu (Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Tongji University)10/07/2017, 17:45Contributed Oral Presentation
With the development of the pulse tube refrigerator, the efficiency increasing meets a technology neck with traditional phase shifter such as double inlet or inertance tube. A displacer as phase shifter is one method to overcome this problem. The displacer with a rod is the ideal phase shifter till now, the phase adjustment is free, and the stroke can be controlled by the rod diameter. Unlike...
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