散流器送风口位置对排风柜性能的影响研究  

Impact Study on Fume Hood Performance upon different Air Supply Outlet Positions

作　　者：张显相 刘东[1] ZHANG Xian-xiang;LIU Dong(School of Mechanical Engineering,Tongji University)

机构地区：[1]同济大学机械与能源工程学院

出　　处：《建筑热能通风空调》2020年第8期20-24,共5页Building Energy & Environment

摘　　要：以某简化的化学实验室-设置排风柜的房间为研究对象,通过对比国内外主流的排风柜评价和测试方法,得出排风柜的浓度和面风速主要用来评价排风柜的性能。从实验室散流器送风口的位置出发,采用正交试验设计,研究散流器风口在相对排风柜不同位置的情况下,通过对污染物浓度和排风柜面风速的波动性、均匀性测试研究,反映其对排风柜性能的影响。通过直观分析和方差分析得到各个因素的显著性排序,从而提出实验室散流器风口位置的最优设计方法。结果表明:综合比较下,散流器风口位置因素对排风柜性能影响大小依次为B(相对前后位置)>A(相对左右位置)>C(相对高低位置)。该工况下,风口的位置最优组合为A1B2C1,面风速的波动性与浓度相关性大。The simplified chemical laboratory room with fume hood is taken as the research object.By comparing the evaluation and test methods of fume hood at home and abroad,the leakage concentration and surface wind speed are mainly used to evaluate the performance of fume hood.Starting from the position of the air supply outlet of the laboratory diffuser,this paper adopts the orthogonal experimental design to study the influence of the air diffuser outlet on the performance of the fume hood by testing and studying the fluctuation and uniformity of the pollutant leakage concentration and the air speed on the fume hood.Through the visual analysis and variance analysis,we can get the significant order of each factor,and then put forward the optimal design method of the position of the diffuser in the laboratory.The results show that:under the comprehensive comparison,the influence of diffuser position on the performance of exhaust cabinet is B(relative front and rear position)>A(relative left and right position)>C(relative high and low position).Under this condition,the optimal combination of the position of the tuyere is A1B2C1,and the fluctuation of the surface wind speed is highly related to the leakage concentration.

关 键 词：散流器 送风口位置 排风柜 正交试验设计 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]