Cryogenic alternating flow heat transfer property testing platform and method

Abstract

The invention discloses a cryogenic alternating flow heat transfer property testing platform and a method and relates to the field of cryogenic engineering. The testing platform comprises a driving unit, a temperature control unit, a testing unit and a phase modulating unit. By providing a temperature sensor, a pressure sensor and a dynamic pressure sensor to separately measure the temperature andpressure signals in a to-be-tested apparatus in real time under a condition close to the actual operating working condition, basic heat exchange data of the to-be-tested apparatus under different parameters can be acquired, so that design and optimization of the to-be-tested apparatus can be guided effectively.

Description

technical field [0001] The invention relates to the field of low temperature engineering, in particular to a test platform and method for deep low temperature alternating flow heat transfer performance. Background technique [0002] The rapid development of space technology and superconducting devices has greatly increased the demand for cryogenic refrigerators. Traditional Stirling refrigerators and G-M refrigerators have been widely used in space infrared imaging and ground cryogenic vacuum pump systems respectively. Thermoacoustic refrigerators have become a research direction for scholars because of their environmental friendliness. In recent years, in order to improve the operating life and reliability of the refrigerator, pulse tube refrigerators with no moving parts at the cold end have attracted more and more attention. The above refrigerators are collectively referred to as regenerative refrigerators. [0003] In regenerative refrigerators, the working medium is ...

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Problems solved by technology

Nsofor et al. conducted experimental research on the heat transfer characteristics of the alternating flow in the heat exchanger of the thermoacoustic refrigerator in the literature [2]. However, due to the limitation of refrigeration capacity, the device is only suitable for heat exchange at room temperature and normal cold temperature range. device

There are many reports on the above-mentioned alternating flow experimental research devices in the above-mentioned temperature regions, but there are still few research systems at deep and low temperatures.

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