Method and system for optimizing arrangement structure of wing-shaped fins of printed circuit board type heat exchanger

Abstract

The invention discloses a method and system for optimizing the arrangement structure of wing-shaped fins of a printed circuit board heat exchanger, and belongs to the technical field of printed circuit board manufacturing. The method comprises the steps that the arrangement geometric parameters of the wing-shaped fins are nondimensionalized, and a sample set is obtained through test design and numerical simulation; inputting a training set in the sample set into an agent model corresponding to the Knooseer number and the resistance coefficient; assigning the initial values of the two on the basis of an improved particle swarm algorithm, and respectively training to obtain an agent model; by taking maximization of a Knoosel number and minimization of a resistance coefficient as optimization objectives, optimizing the two trained proxy models by adopting a multi-objective optimization algorithm to determine a Pareto leading edge set; and acquiring an optimal compromise solution by adopting a multi-objective decision-making method, and optimizing the arrangement structure of the wing-shaped fins by utilizing the corresponding optimization variables. According to the method, the difficult problems of fixed geometric optimization parameters, limited inlet speed range, low optimization efficiency and the like in an existing wing fin arrangement structure optimization method are solved.

Description

technical field [0001] The invention belongs to the technical field of printed circuit board manufacturing, and more particularly, relates to a method and system for optimizing the arrangement structure of airfoil fins of a printed circuit board heat exchanger. Background technique [0002] Printed Circuit Heat Exchanger (PCHE) is a new type of compact and efficient plate heat exchanger, which was successfully developed and commercialized by British Heatric Company. Micro channels are etched, and then the flow channels are diffused and superimposed by diffusion welding technology. The heat exchange core has the same mechanical properties as the raw materials and can withstand extreme operating conditions of high temperature and high pressure. It has been widely used in offshore natural gas and oil and gas processing, floating LNG units, high temperature reactor intercoolers and supercritical carbon dioxide Brayton cycle heat exchangers. [0003] The flow behavior of the flu...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method and system for optimizing the arrangement structure of the airfoil fins of the printed circuit board heat exchanger. As a dimensionless optimization design variable, classification can be extended to the optimal design of heat exchangers with different geometric sizes and different inlet velocities according to the similarity principle. The optimization variables are used to train the proxy models corresponding to the Nusselt number and the resistance coefficient respectively, replacing a large number of Numerical calculation is beneficial to improve the optimization efficiency, and then use the multi-objective optimization algorithm to optimize the two surrogate models after training to determine the Pareto front set corresponding to the optimization variables, so as to obtain the dimensionless Optimization variable ζ s ', ζ h ' and ζ v '; This solves the existing problems in the existing airfoil fin arrangement structure optimization methods, such as fixed geometric optimization parameters, limited inlet velocity range, and low optimization efficiency.

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