Method and device for utilizing magneto-thermal convection to intensify low-temperature oxygen-containing fluid heat transfer

Abstract

The invention discloses a device for utilizing magneto-thermal convection to intensify low-temperature oxygen-containing fluid heat transfer. The device comprises two end sockets provided with heat transfer fluid outlets and inlets, and a heat transfer core located between the two end sockets. Heat transfer passages communicated with the corresponding heat transfer fluid outlets and inlets are arranged inside the heat transfer core respectively, and at least one heat transfer passage is filled with oxygen-containing low-temperature fluid. The device for utilizing magneto-thermal convection to intensify low-temperature oxygen-containing fluid heat transfer further comprises a magnetic field generation device for generating gradient magnetic field acting force on the low-temperature oxygen-containing fluid. The invention further discloses a method for utilizing magneto-thermal convection to intensify low-temperature oxygen-containing fluid heat transfer. According to the device and the method for utilizing magneto-thermal convection to intensify low-temperature oxygen-containing fluid heat transfer, a high gradient magnetic field is formed on the heat transfer surface of the outer magnet surrounding the heat transfer core, convection heat transfer is intensified on the premise of not changing the structure of a heat transfer and not introducing extra resistance, the heat transfer efficiency is improved, and the size and energy consumption of a heat exchanger are reduced.

Description

technical field [0001] The invention relates to low-temperature medium heat exchange, in particular to a method and a device for enhancing heat transfer of low-temperature oxygen-containing fluid by thermomagnetic convection. Background technique [0002] The heat exchanger is the main place to realize the heat exchange of cold and hot fluids. Cryogenic heat exchangers play an important role in large industrial processes represented by air separation. In the air compression process, in order to improve the compression efficiency, casing cooling and interstage coolers are required; the main heat exchanger needs to be installed in the air liquefaction cycle; there are liquefiers, subcoolers and rectification equipment in the cold box of the air separation device The main condensing evaporator in the middle, etc. The performance of these heat exchangers directly affects the stable operation and economic indicators of the entire system. [0003] When the heat exchanger works ...

AI Technical Summary

Problems solved by technology

At present, the increase of the heat exchange area is mainly limited by the processing technology and the volume of the heat exchanger.

[0009] (2) Increase the temperature difference, which can be realized through a reasonable and compact flow channel arrangement. It is relatively mature at present, but the increase of the heat transfer temperature difference will also bring certain irreversible losses.

[0012] At present, there is no related report on the method and device of using thermomagnetic convection to enhance the heat transfer of low-temperature oxygen-containing fluid

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