Design method of heat exchange-resistance type slit cold end heat exchanger for composite refrigerating machine

Abstract

The invention discloses a design method of a heat exchange-resistance type slit cold end heat exchanger for a composite refrigerating machine, which can reasonably screen materials of the heat exchanger, optimize size parameters of the heat exchanger, comprehensively consider heat exchange and flow characteristic factors of the heat exchanger and realize performance optimization of the heat exchanger under certain conditions. The specific surface region of the slit cold-end heat exchanger is increased to enhance the heat exchange performance of the heat exchanger, the number of slits is increased to reduce the flow resistance, and the comprehensive performance of flow heat exchange is improved. The method has important guiding significance on design and optimization of the heat exchange-resistance type slit cold end heat exchanger, can greatly improve the performance and efficiency of the extremely low temperature region composite refrigerating machine, and has very positive significance on the aspects of practicability, aerospace application and the like of the extremely low temperature region composite refrigerating machine.

Description

technical field [0001] The invention belongs to the field of refrigeration and low temperature engineering, specifically relates to the technology of composite refrigerators in extremely low temperature regions, and in particular to a design method of a heat exchange-resistance type slit cold end heat exchanger for composite refrigerators in extremely low temperature regions. Background technique [0002] The ultra-low temperature composite refrigerator technology that combines the regenerative pulse tube refrigerator and the partitioned Joule-Thompson refrigerator is an important means to extend the refrigeration temperature below 2K, and will provide a great opportunity for deep space exploration, superconducting single photon detection and space exploration. Quantum communication technology provides important low-temperature environment support. [0003] The cold-end heat exchanger is the core component of the composite refrigerator in the extremely low temperature zone, ...

AI Technical Summary

Problems solved by technology

The traditional cold-end heat exchanger for composite refrigerators in extremely low temperature regions, that is, the coil heat exchanger, although it has the obvious advantage of large heat transfer, it also requires a large heat transfer area, and the resistance pressure drop brought to the system It is also very large, which is not conducive to the performance of the composite refrigerator in the extremely low temperature zone. At the same time, its large volume and weight are not conducive to the space application of the composite refrigerator in the extremely low temperature zone

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