Design method of heat exchange-resistance type slit cold end heat exchanger for composite refrigerating machine
A cold-end heat exchanger and composite refrigeration technology, which is applied in computer-aided design, design optimization/simulation, calculation, etc., can solve the problem of volume and weight unfavorable for the space application of the composite refrigerator in the extremely low temperature area, and unfavorable for the composite refrigerator in the extremely low temperature area. performance, resistance and pressure drop, etc., to achieve the effect of efficient heat exchange, increase heat exchange, and reduce flow piezoresistance
Pending Publication Date: 2021-06-04
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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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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[0026] Below in conjunction with accompanying drawing and embodiment the specific embodiment of the present invention is described in further detail:
[0027] figure 1 It is a flow chart of the design method of a heat transfer-resistance type slit cold end heat exchanger invented for a composite refrigerator in the extremely low temperature region.
[0028] A heat transfer-resistance type slit cold-end heat exchanger design method for composite refrigerators in extremely low temperature regions, characterized in that it includes the following steps:
[0029] Step 1: According to the actual project, determine the design target parameters of the heat transfer-resistance type slit cold end heat exchanger for the composite refrigerator in the extremely low temperature zone: the minimum heat transfer Q min and the maximum resistance pressure drop ΔP max .
[0030] Step 2: According to the actual working conditions, select the material of the heat transfer-resistance slit cold en...
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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, ...
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IPC IPC(8): G06F30/17G06F30/20G06F119/08
CPCG06F30/17G06F30/20G06F2119/08
Inventor 党海政赵帮健
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI