20150325 ECA新闻：洁净区概念及其对HVAC技术的影响

20150325 ECA新闻：洁净区概念及其对HVAC技术的影响  

2015-03-26 08:10:39|  分类： ECA新闻

来源：http://zhuyujiao1972.blog.163.com/blog/static/98694727201522681039510/

GMP News
25/03/2015

http://www.gmp-compliance.org/enews_04697_Clean-room-concepts-and-their-impacts-on-the-HVAC-technology.html

Clean room concepts and their impacts on the HVAC technology

洁净区概念及其对HVAC技术的影响

A detailed process analyses is required already during the development of the layout. Here, the process flow must be broken down into its single steps and the corresponding flow chart has to be compiled showing the flows of material, personnel, waste etc. as well as the required clean room class. Then follow the linking of the process steps, an analysis of the flows and finally the design of layout concepts and the determination of the area required. Particular attention should be paid to the need to keep rooms with high clean room requirements as small as possible.

在平面图设计的过程中，已经要求进行详细的工艺分析。这里，工艺流程必须拆分为单个步骤，相应的流程图必须显示物料、人员、废物等的走向。然后根据工艺步骤的链接情况，对物料进行分析，最终要求完成平面布局概念的设计及对区域的最终决定。尤其需要注意的是要让具有最高洁净要求的房间尽量小。

Air technical protection concepts make a distinction between the turbulent mixing flow (TMF) for ISO classes 7 and 8 and the low-turbulence displacement flow (LTF) for ISO 5 and better. In the case of the turbulent mixing flow the clean air is introduced into the clean room in a turbulent (swirling) way. It causes a constant dilution and thus "cleaning" of the clean room. If the personnel behave correspondingly the required cleanliness class can be maintained. In the case of the low-turbulence displacement flow the clean air flows low in turbulence ("laminar") in the clean room and ensures that sensible working areas and machinery are contaminated as little as possible.

空气技术保护概念对于ISO7级和8级所需的湍流混合流（TMF）和ISO5级所需的低湍流置换流具有明显的差异。湍流混合流时，洁净空气以湍流（涡流）方式送入洁净区，它会产生稳定的稀释，从而对洁净间进行“清洁”。低湍流置换流时，洁净空气以层流方式进入洁净间，保证敏感工作区和设备受到的污染尽可能少。

As concerns the relation between clean room classes or air exchange and size of the HVAC system for each increase of the clean room class from ISO 8 to ISO 6 can be assumed at least a doubling of the amount of air and a doubling of the ventilation system. For the step from ISO 6 to ISO 5 (laminar) it is even the factor 7 that has to be assumed. Clarity or planning security can be reached by means of a corresponding flow simulation of different variants.

随着洁净室级别增加，其换气次数和HVAC系统的尺寸也会增加。从ISO8级提高到ISO6级，可以假定空气量和通风系统规模至少要增加一倍。而从ISO6级提高到ISO5级（层流），则预测该系数可能达到7。通过不同情况下对应的气流模拟，可以达到对洁净度清楚概念或保证计划准确。

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