Enhanced heat exchange method

Abstract

The invention provides an enhanced heat exchange method. The method includes the following steps of S1, establishing a heat exchanger model to obtain matrix expressions of a heat transfer coefficientand a temperature difference; S2, obtaining a total heat exchange amount expression according to the matrix expressions; S3, obtaining the relationship between the heat transfer coefficient and the temperature difference according to the total heat exchange amount expression; and S4, changing the entry condition or structural form of an enhanced heat exchanger according to the relationship betweenthe heat transfer coefficient and the temperature difference.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to a method for enhancing heat exchange. Background technique [0002] In the design of traditional heat exchangers, it is often assumed that the physical properties of the fluid and the heat transfer coefficient change little. Under normal conditions, the physical properties of conventional fluids change very little. Therefore, the above assumptions can be accepted by engineering, and the error Also relatively small. However, for fluids with large changes in physical properties, such as supercritical fluids near the pseudocritical point, since supercritical fluids have many unique properties, such as low viscosity, density, diffusion coefficient, and solvation ability, etc., change with temperature and pressure It is very sensitive, and the viscosity and diffusion coefficient are close to gas, while the density and solvation ability are close to liquid, which leads to the fact that ...

AI Technical Summary

Problems solved by technology

However, for fluids with large changes in physical properties, such as supercritical fluids near the pseudocritical point, since supercritical fluids have many unique properties, such as low viscosity, density, diffusion coefficient, and solvation ability, etc., change with temperature and pressure It is very sensitive, and the viscosity and diffusion coefficient are close to gas, while the density and solvation ability are close to liquid, which leads to the fact that the physical properties of this type of fluid cannot be ignored in heat transfer. Therefore, according to the traditional heat transfer method, the physical properties change greatly The heat exchange of fluids often has huge errors, and it is difficult to achieve good results

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