H型通风系统节能运行局部阻力特性数值模拟及优化

Numerical Simulation and Optimization of Local Resistance Characteristics for Energy-Saving Operation of H-Type Ventilation System

在工业通风系统中,局部构件阻力占通风系统总阻力40%~60%,因此降低局部构件的阻力损失对提高通风系统的能效具有重要意义。现阶段,降低局部构件阻力损失的方法主要通过添加导流板和优化局部构件结构。本文采用ANSYS Fluent 18.2软件对不同导流板形式的通风系统阻力特性进行了研究。结果表明:在三通处增加导流板可以减少阻力损失,局部构件最大减阻率提高19%,并且保证通风系统的风量分配均匀。本研究有望对工业通风系统的低碳节能运行进行优化。

IIn industrial ventilation system,the resistance of local components accounts for 40%~60%of the total resistance of ventilation system,so reducing the resistance loss of local components is of great significance to improve the energy efficiency of ventilation system.At present,the methods to re-duce the resistance loss of local members are mainly through adding baffle and optimizing the structure of local members.In this paper,ANSYS Fluent 18.2 software is used to study the resistance characteristics of ventilation systems with different baffle forms.The results show that adding the guide plate at the tee can reduce the drag loss,increase the maximum drag reduction rate of local components by 19%,and ensure the uniform air volume distribution in the ventilation system.This study is expected to optimize the low-carbon and energy-saving operation of industrial ventilation systems.