Influence of the connecting tube at the cold end in a U-shaped pulse tube cryocooler
作者： J.Y. Hu , X.Z. Zhang , X.T. Wang , E.C. Luo , W. Dai
DOI: 10.1016/J.CRYOGENICS.2014.05.011
关键词: Tube (fluid conveyance) 、 Inertance 、 Cryocooler 、 Pulse tube refrigerator 、 Materials science 、 Regenerative heat exchanger 、 Mechanics 、 Electrical impedance 、 Heat exchanger 、 Pulse (physics)
摘要: Abstract In some special applications, the pulse tube cryocooler must be designed as U-shape; however, connecting at cold end will influence cooling performance. Although lots of U-shape tubes have been developed, mechanism on performance has not well demonstrated. Based thermoacoustic theory, this paper discusses length and diameter tube, transition structure, flow straightener, impedance inertance etc. Primary experiments were carried out in two in-line shape cryocoolers to verify analysis. The shared same regenerator, heat exchangers, so these components could eliminated. With electric power, without parts obtained 31 W power 77 K; meanwhile, other with only 27 W, induced more than a 12.9% decrease performance, which agrees calculation quite well.
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