Research On Optimization Of Damper Resistance Characteristics Of Based On The Control Of Energy Dissipation

In order to solve the problem of increasing energy consumption in ventilation and air conditioning systems,this paper studies the local resistance and regulation of the damper.The essence of the local resistance is the internal energy consumption of the fluid in the damper.Therefore,the evaluation index of energy dissipation is introduced to describe the local resistance coefficient of the damper,and to analyze the resistance reduction mechanism.In addition,based on the traditional resistance calculation formula,the mathematical formula of the local resistance coefficient curve when the damper is opened and the flow characteristic curve are derived,and the damper is optimized based on this formula.In this paper,numerical simulations are used to optimize the single leaf damper with only the switching function and the multi-leaf damper with the adjusting function to obtain the optimized structures,local resistance coefficients,resistance reduction rates and the flow characteristic curves under different working conditions.And through the full-scale experiments,the optimization effect of the novel low-resistance damper and the new regulating damper is verified.Based on the energy dissipation,a novel low-resistance damper is proposed.The novel low-resistance damper reduces the deformation of the fluid,the strength and range of the air vortex,and the conversion of mechanical energy to internal energy.Observing the novel low-resistance damper and traditional single leaf damper from the perspective of turbulent dissipation rate,the energy dissipation of the novel damper is significantly reduced.At different air velocity(3 ～ 12m/s),the local resistance coefficient of the novel low-resistance damper is much lower than that of the single leaf damper,and the resistance reduction rate is 81.4%～87.16%.Based on the local resistance coefficient curve when the damper is opened,the terminal adjustment equipment(parallel multi-leaf adjustment air damper)of the ventilation and air conditioning system is optimized,and a novel adjustment damper is obtained.No matter what kind of working condition,the novel adjusting damper can make its working flow characteristic curve linear by adjusting the shaft spacing,and the mathematical formula between the shaft spacing and the resistance coefficient of the actual working conditions is given.This formula can be used in the field of actual engineering design,providing a reference for the selection of air damper and the design of adjustment control systems,and it can also provide a new perspective for the research in the field of air volume control.