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How to calculate the number of air changes in a class 1,000 clean room?
I believe we should all know that the number of air changes is an essential parameter in the clean room, the so-called number of air changes, in fact, refers to the amount of clean air through the room is equivalent to the number of times the volume of the room, the unit is times / h. If the amount of air through the room in an hour and the volume of the same, the number of air changes is 1 / h, and so on, the number of air changes is the most chaotic flow clean room to determine the level of cleanliness. The number of air changes is the most important parameter to determine the cleanliness level in a messy flow clean room. So do you know how to calculate the number of air changes in a class 1,000 clean room?
China's "Clean Plant Design Code" (GB50073-2001) clearly specifies the number of empirical air changes required to calculate the clean air supply volume of non-unidirectional flow clean rooms of different levels, see the following table：
The clean room is different, the number of air changes is different, the number of air changes is different, the dust particle capacity is different, the filtered dust particles are different, the air volume, equipment, cost is different. Therefore, the number of air changes in a thousand clean rooms can be calculated according to the air cleanliness level of a thousand in the table above, combined with the number of people in the room, the room area, the amount of other indoor dust generation and fresh air ratio through the formula, especially the dynamic conditions need to be calculated for specific conditions.
However, when calculating the number of air changes in the clean room, we should pay attention to not blindly design the air volume according to the number of air changes, and should also consider the room and process residual heat, residual humidity. Otherwise, the air volume may be able to meet the temperature and humidity requirements at the beginning, and the system will not work so well after running for a period of time.
Shanghai LJ focuses on the overall design and construction of clean room for 13 years. We have the second-level qualification of construction and installation, and our cleanrooms have passed the third-party authoritative testing 100% of the time, with more than 200 successful cases. Our goal is to build clean rooms that run stably for 15 years. For more details about clean plant, clean room, clean room design, clean room decoration, clean plant, clean workshop, clean room, etc., please visit our official website：www.link-ac.com, or call us for more information：18917954372。
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