Dr. Yifeng Zhu Profile

Dr. Yifeng Zhu

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Proceedings Article | 20 September 2022 Paper

Study on optimization and fluid distribution uniformity of manifold in mechanical ventilation system

Yifeng Zhu, Liping Sun, Dongze He, Jinyuan Guo

Proceedings Volume 12261, 1226105 (2022) https://doi.org/10.1117/12.2640834

KEYWORDS: Process modeling, Structural design, Optimization (mathematics), Electrical engineering, Mathematical modeling, Forestry, Data modeling, Systems modeling, Numerical simulations

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Aiming at the problem of uneven fluid distribution in the working area of the mechanical ventilation system, a conceptual design solution process model based on the functional decomposition tree is proposed in this paper. After solving the model, three groups of structural optimization and improvement design schemes are obtained from adjusting the position of the pressure relief outlet and optimizing the parameters of the air distribution manifold inlet. The wind speed data of 180 monitoring points from 12 fluid characteristics simulation results are numerically calculated by 5 evaluation indexes such as wind speed difference at monitoring points and velocity uneven coefficient M. After four rounds of comparative analysis, the optimal scheme 3-3 is carried out. Comparing the results of original problem with Scheme 3-3, it is found that the difference of wind speed decreases from 0.915 to −0.009, and the velocity uneven coefficient M decreases by 18.44 %. It is determined that when the number of manifold outlets is 3 and the aperture a=0.05m, the effect on improving the airflow distribution uniformity in the working area of the mechanical ventilation system is obvious. The experimental results show that it is feasible and effective to apply the conceptual design solution process model based on the functional decomposition tree to the structural optimization design of the manifold for the mechanical ventilation system. The model can provide the theoretical basis for the optimization of the geometric parameters and structural improvement design of the mechanical ventilation system in many fields such as marine engine room ventilation systems and wood drying ventilation systems.

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