Three-level gas coupled pulse pipe refrigerator designing method based on circuit analogy and entropy analysis

Abstract

The invention discloses a three-level gas coupled pulse pipe refrigerator designing method based on circuit analogy and entropy analysis. The method totally comprises five steps that firstly, a three-level gas coupled pulse pipe refrigerator structural model is established; secondly, a three-level gas coupled pulse pipe refrigerator circuit analogy model is established; thirdly, temperature distribution in a heat regenerator is calculated through an enthalpy flow analysis method; fourthly, the refrigerating capacity of a three-level gas coupled pulse pipe refrigerator is solved through an entropy analysis model; and fifthly, related work parameters and part sizes are optimized. According to the three-level gas coupled pulse pipe refrigerator designing method, various irreversible losses can be obviously reduced, the refrigerating efficiency of the system is improved, and the three-level gas coupled pulse pipe refrigerator designing method is of great significance in practical development of the three-level gas coupled pulse pipe refrigerator.

Description

technical field [0001] The invention relates to the field of refrigeration and cryogenic engineering, in particular to a design method of a three-stage gas-coupled pulse tube refrigerator based on the combination of a circuit analog model and an entropy analysis model. Background technique [0002] In the past half a century, low-temperature refrigeration technology has been developed rapidly, and has been widely used in defense, military, aerospace, medical, energy and other fields; Very long-wave infrared detection, terahertz detection, X-ray detection, low-temperature superconductivity and other fields play an indispensable role. The traditional liquid helium cryostat, due to the shortcomings of large volume, high quality, complex insulation system, etc., has been greatly restricted in the application of military and space projects. Therefore, multi-stage mechanical refrigerators have been widely favored. In particular, the pulse tube refrigerator cancels the cold-end e...

AI Technical Summary

Problems solved by technology

Among them, the thermal coupling type has a simple design, but has a large volume and relatively low efficiency; while the gas coupling type avoids mechanisms such as thermal bridges, so it has a compact structure and relatively high efficiency, but its internal working fluid flow is also more difficult to control

At present, different design methods have been tried for these two types of multi-stage refrigeration systems in the world, but a set of generally recognized high-efficiency design methods has not yet been summarized.

In particular, the design method based on the combination of the circuit analog model and the entropy analysis model for the three-stage gas-coupled pulse tube refrigerator has not yet been reported in the open literature.

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