Multi-Objective Structural
Optimization of Claw-Type Hydrogen Circulation Pump Based on GPR and
NSGA-Ⅱ#br#

Vehicle Engine ›› 2026, Vol. 0 ›› Issue (4) : 87-94.

Multi-Objective Structural Optimization of Claw-Type Hydrogen Circulation Pump Based on GPR and NSGA-Ⅱ#br#

LI Xia^1,2,HU Haibo¹,GAO Lin¹,ZHU Bin³,LIU Benxue^1,2

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Abstract

As a core component of the proton exchange membrane fuel cell (PEMFC), the performance optimization of claw-type hydrogen circulation pump is crucial for improving the overall efficiency of fuel cell. To enhance the hydrogen supply capacity and working efficiency of claw-type hydrogen circulation pump, multi-objective optimization design was carried out for its structure. A prediction model for the average flow rate and volumetric efficiency of claw-type hydrogen circulation pump was first established based on Gaussian process regression (GPR). Then the model was combined with the non-dominated sorting genetic algorithm-Ⅱ (NSGA-Ⅱ) to optimize average flow rate and volumetric efficiency, and the Pareto frontier solution set was substituted into the multi-criteria decision making (MCDM) analysis method to find the optimal combination of structural parameters. The results show that the prediction model based on GPR has a coefficient of determination greater than 0.95 and a root mean square error (RMSE) less than 0.5, which exhibits excellent prediction accuracy and correlation, and can greatly reduce the number of simulation and experiment in practical applications. Compared with the parameters before optimization, the optimal structural parameters obtained by NSGA-Ⅱ have increased the average flow rate of claw-type hydrogen circulation pump by 12.04% and the volumetric efficiency by 2.68% relatively.

Key words

claw-type hydrogen circulation pump / optimization design / Gaussian process regression (GPR) / non-dominated sorting genetic algorithm (NSGA)

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LI Xia, HU Haibo, GAO Lin, ZHU Bin, LIU Benxue. Multi-Objective Structural Optimization of Claw-Type Hydrogen Circulation Pump Based on GPR and NSGA-Ⅱ#br#[J]. Vehicle Engine. 2026, 0(4): 87-94