ISO 6级洁净室换气次数确定方法的实验研究  

Experimental Study on the Method of Determining Air ChangeRate in a ISo6Cleanroom

作　　者：伊伟奇 李浩[1] 李超 吴重纬 黄翠 黄晨[1] YI Weiqi;LI Hao;LI Chao;WU Chongwei;HUANG Cui;HUANG Chen(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;Yancheng State-Owned Assets Group,Yancheng 224000,Jiangsu,China;City University of Hefei,Hefei 230000,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]盐城市国有资产投资集团有限公司,江苏盐城224000 [3]合肥城市学院,合肥230000

出　　处：《建筑节能（中英文）》2023年第4期71-76,共6页Building Energy Efficiency

摘　　要：非单向流洁净室设计时,由于事先无法准确获得室内发尘量资料,一般按洁净度要求利用相关设计规范确定换气次数取值范围,但所选用的换气次数在各种因素的影响下,实际使用时是否能满足洁净度要求,是否会过大而造成能耗浪费。以一典型顶送侧回的ISO 6级非单向流洁净室为研究对象,利用正交实验方法,获得对室内洁净度影响较大的4个因素影响程度排序:室内发尘量、换气次数、送风口尺寸、尘源高度。在此基础上,在送风结构与房间污染源位置固定的洁净室内,进行不同换气次数下室内发尘量对室内浓度变化的特性实验。通过实验结果获得不同换气次数、发尘量时的颗粒物浓度计算拟合式,以此确定了ISO 6级下选用换气次数的室内最大允许发尘量,即按规范选用50~60次/h换气次数时室内最大允许发尘量为7.4×10^(4)~8.9×10^(4)pc/(m^(3)·min)。同样,还可确定在不同发尘量时需要的最小换气次数,比如室内发尘量为4.0×10^(4)pc/(m^(3)·min)时,此时ISO 6级洁净室只需nmin=27次/h。因此,按洁净度确定非单向流洁净室换气次数的同时考虑室内发尘量的大小,可以在满足室内洁净度要求的同时节约能源。In the design of non-unidirectional flow cleanroom air conditioning system,due to the inability to obtain accurate indoor dust load information,generally air change rate is determined by the cleanliness requirements of design specifications.However,it's uncertain whether the selected magnitude of air change rate can meet the cleanliness requirements in actual use under the influence of various factors,and whether it will be too high and cause excessive energy consumption.In this paper,a typical top supply side return ISO 6 non-unidirectional flow cleanroom is used as the research object,and the orthogonal experiment method is used to obtain the influence of four factors that have a greater impact on indoor cleanliness:indoor dust load,the air change rate,the dimension of the air supply outlet,and the height of the dust source.On this basis,the thesis conducted experiments on the characteristics of indoor dust load on the variation of indoor particle concentration under different air change rates in the cleanroom with a fixed position of air supply structure and dust source.The results of the experiments were used to obtain the fitted formula for calculating the concentration of particulate matter at diferent air change rates and dust load,and to determine the maximum indoor dust load at ISO 6 level for the selected air change rate,i.e.,7.4×10^(4)pc/(m^(3)·min)to 8.9×10^(4)pc/(m^(3)·min)for the maximum indoor dust load at air change rates 50~601/h.Similarly,the minimum air change rate at different dust load can also be determined.Therefore,considering the magnitude of indoor dust load while determining the air change rate of non-unidirectional flow cleanroom,which can meet the cleanliness requirements and conserve energy.

关 键 词：非单向流洁净室 正交实验 发尘量 换气次数 

分 类 号：TU834[建筑科学—供热、供燃气、通风及空调工程]