A core structure optimization method for plate-fin heat exchanger based on dynamic pixel granularity

Abstract

The invention discloses a method for optimizing the core structure design of a plate-fin heat exchanger based on dynamic pixel granularity. According to the flow channel structure of the plate-fin heat exchanger core, an optimal design model for the core structure of the plate-fin heat exchanger is established, and the pixel granularity is dynamically updated to expand the search range of the population and maintain the diversity of the population; The pixel distance calculation model, according to the pixel distance of the particles, adaptively calculates the probability of crossover and mutation operations, respectively adopts random crossover and Gaussian mutation, enhances the global search ability of the population, improves the local search efficiency of the population, and avoids the algorithm from falling into local optimum. To achieve the goal of wide coverage and uniform distribution of Pareto optimal solutions. The invention can improve the structural design efficiency of the core body of the heat exchanger and provide more reasonable design parameters. The optimized design of the plate-fin heat exchanger of the present invention has the remarkable characteristics of uniform channel load, small secondary heat transfer temperature difference, small flow resistance and high heat exchange efficiency.

Description

technical field [0001] The core structure optimization method of the plate-fin heat exchanger of the present invention particularly relates to a core structure optimization method of the plate-fin heat exchanger based on dynamic pixel granularity. Background technique [0002] Compared with traditional heat exchangers such as tube heat exchangers, plate-fin heat exchangers have the characteristics of high heat transfer efficiency, good temperature difference control, compact structure, high cost performance, wide adaptability, and high reliability. They are manufactured by brazing. Improve the compressive strength of heat exchange, can be used for multi-fluid heat exchange, heat exchange between various media, and has wide applications in the fields of air separation equipment, aerospace, petrochemical, atomic energy and national defense industries. The plate-fin heat exchanger uses fins as the heat exchange unit, and its heat transfer coefficient and heat transfer area are ...

AI Technical Summary

Problems solved by technology

The existing heat exchanger structure optimization design method has the disadvantages of strong local optimization ability but poor global search ability, prone to premature convergence, and the design accuracy is difficult to meet the demand

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