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Design Study of 4 K Stirling Type Pulse Tube Cryocooler with Precooling

Author: DaiLi
Tutor: QiuLiMin；GanZhiHua
School: Zhejiang University
Course: Refrigeration and Cryogenic Engineering
Keywords: Stirling -type pulse tube refrigerator Liquid helium temperature zone Regenerator Cold inertance tube REGEN3.3
CLC: TB651
Type: Master's thesis
Year: 2008
Downloads: 86
Quote: 1
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Abstract


The liquid helium temperature zone cryocoolers has important applications in low-temperature superconducting devices cooled helium liquefier, deep space exploration. The liquid helium temperature zone cryocoolers, such as GM refrigerator and GM type pulse tube refrigerator, the prevalence of refrigeration efficiency is low, volume weight, require regular maintenance and other outstanding problems. Stirling type pulse tube refrigerator driven linear compressor has the advantages of compact structure, light weight, high efficiency, long life, so active in the liquid helium temperature Stirling-type pulse tube refrigerator research has important academic research and application value. This article first loss mechanism of the liquid helium temperature zone pulse tube refrigerator, theoretically discussed the Stirling type PTC liquid helium temperature method focuses on the mechanism of the liquid helium temperature zone regenerator loss carry the the precooling type liquid helium temperature zone pulse tube refrigerator design research laid the foundation, in order to improve the liquid helium temperature zone vasculature refrigeration efficiency. The main study are as follows: 1. Structured layout scheme draws on the arrangement between the level of liquid helium temperature zones GM type pulse tube refrigerator, Stirling type pulse tube refrigerator to liquid helium temperature of many possible layout program. Combined with the existing research base, the group proposed GM type pulse tube refrigerator precooling single-stage Stirling type PTC liquid helium temperature. We first determine the Stirling type pulse pulse tube refrigerator precooling type liquid helium temperature zone design research through the gas working fluid and the thermal storage material thermal penetration depth analysis calculations, combined with the existing linear compressor performance parameters tube cryocooler operating parameters. Numerical calculation procedures using the latest development of the U.S. National Institute of Standards and Technology NIST regenerator REGEN3.3, simulated liquid helium temperature zone regenerator performance analysis of the working fluid gas, regenerator geometry, recuperator heat The end of the operating temperature, regenerator fillers impact on the the regenerator performance of the liquid helium temperature zone regenerator loss mechanism. Theoretical analysis shows that, using helium as working fluid can greatly improve the performance of the liquid helium temperature zone pulse tube refrigerator using GOS and Er 0.9 Yb 0.1 Ni mixed filler the best choice of the liquid helium temperature zone regenerator filler. On this basis, we conducted the regenerator and the whole design of the cryogenic stage pulse tube refrigerator precooling type liquid helium temperature zone. 3 Low inertia tube to introduce our study found that liquid helium temperature Stirling-type pulse tube refrigerator regenerator cold end of the acoustic power is small, the conventional placement phase shifter at room temperature inertia tube can not play a role. Low temperature for the inertia of pipe can provide ideal phase between the cold end mass flow and pressure wave. This paper focuses on a cryogenic inertial tube condenser reasonable, and its application to the precooling type Stirling pulse tube refrigerator design.

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CLC: > Industrial Technology > General industrial technology > Refrigeration Engineering > Refrigeration machinery and equipment > Refrigerator
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