A method for enhancing convective heat transfer at phase interface

Abstract

The invention discloses a method for enhancing convective heat transfer at a phase interface, which belongs to the technical field of heat transfer. It is characterized in that: the heat exchange medium and the strengthening medium are mixed to form a mixed medium and then exchange heat with the heating agent or refrigerant, or the heat exchange medium is mixed with the strengthening medium during the heat exchange process with the heating agent or refrigerant to form a mixed medium, and the A phase interface is formed between the heat exchange medium and the strengthening medium, and the strengthening medium is a medium insoluble with the heat exchange medium. This method of strengthening convective heat transfer at the phase interface uses the mixture of the strengthening medium and the heat exchange medium to form a phase interface, which solves the shortcoming of the low heat transfer coefficient of a single phase. The unstable characteristics, fluctuation characteristics, flow pattern and scale change characteristics of the phase interface between phase flow or multiphase flow make the fluid mixing more intense, thereby enhancing convective heat transfer, which can increase the convective heat transfer coefficient and improve the heat transfer of the heat exchanger capacity and save energy.

Description

technical field [0001] The invention discloses a method for enhancing convective heat transfer at a phase interface, which belongs to the technical field of heat transfer. Background technique [0002] Heat exchangers are widely used in various fields of national life and production, and convective heat transfer is the main heat transfer form of various heat exchangers. For example, household air conditioners, refrigerators, etc., and industrial medicine, electric power, chemical industry, petroleum, nuclear engineering, food and other fields, there are a large number of convective heat transfer processes. Strengthening the convective heat transfer process can obtain greater heat transfer per unit volume, reduce the volume of the heat exchanger, reduce the amount of materials used, and help reduce energy waste, so it is of great significance for energy saving and emission reduction. At present, enhanced heat transfer technologies include a variety of enhanced shapes, struct...

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Problems solved by technology

[0003] The above enhanced heat transfer technology has problems such as manufacturing difficulties and large pressure drop loss, and its application is very limited.

At the same time, in the fields of medicine and food, extremely high hygiene and safety requirements limit the application of many special structures for enhanced heat transfer. Due to the limitation of heat transfer medium, it is also difficult to use nanofluid, magnetic fluid and other enhanced heat transfer technologies.

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