Thermophysical parameter calculation method and homogenization design method of plate-fin heat exchanger

Abstract

The invention relates to a thermophysical parameter calculation method and a homogenization design method of a plate-fin heat exchanger, and belongs to the technical field of heat exchangers. The thermophysical parameter calculation method is characterized by comprising the following steps: step a, dividing a plate fin structure into a plurality of plate fin base cells with the same shape; step b, enabling the plate fin base cells to be equivalent to a uniform solid plate; and step c, acquiring equivalent thermophysical parameters of the plate fin base cells, thus acquiring equivalent thermophysical parameters of a whole plate-fin heat exchanger core body. With adoption of the thermophysical parameter calculation method of the plate-fin heat exchanger, the problem in the prior art that a process is tedious as equivalent thermophysical parameters can only be acquired through experiments or finite element simulation is solved; and a calculation result can be used for high-temperature strength design of the plate-fin heat exchanger, and the design process is simplified; according to the homogenization design method of the plate-fin heat exchanger, effective service life prediction can be carried out on the plate-fin heat exchanger serving under high temperature and alternating load, and an effective method is supplied for high temperature design of the plate-fin heat exchanger.

Description

technical field [0001] The invention relates to a thermal physical property parameter calculation method and a homogenization design method of a plate-fin heat exchanger, belonging to the technical field of heat exchangers. Background technique [0002] With the development of science and technology, more and more energy is consumed, so energy conservation and emission reduction and improvement of energy utilization have become the focus of attention. Heat exchange equipment, as a core member of the high-temperature system, not only requires efficient heat exchange performance, but also requires a compact structure. However, most of the existing heat exchange equipment are shell-and-tube heat exchangers, which occupy a large volume and have low heat exchange efficiency, making it difficult to meet the requirements in the fields of aerospace, high-temperature gas-cooled reactors, and gas turbines. The plate-fin heat exchanger has the characteristics of compact structure and ...

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Problems solved by technology

However, due to the periodic and complex structure of the plate-fin heat exchanger, it is difficult to perform finite element simulation of the plate-fin heat exchanger. Using finite element analysis software to design the high-temperature strength of plate-fin heat exchangers has seriously affected the development of plate-fin heat exchangers

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