How to calculate the cooling air volume in the clean room?
Clean room, also known as clean room or clean room, is the basis of pollution control.
Refrigeration solution for clean room
The refrigeration plan of the dust-free workshop should be based on the cooling requirements (cooling consumption, cooling method, chilled water temperature, etc.), the water source conditions (water temperature, water quality, water volume, etc.) of the project construction area, and the power and heat source preparations for technical and economic comparison. Not only requires good economic indicators, but also considers local possibilities.
How to calculate the cooling air volume in the clean room?
1. Before determining the air volume required in a space, we must first figure out another concept: what is the number of air changes?
Assuming that the area of a room is 100 square meters and the height is 3 meters, the volume of this house is 300 cubic meters. If we send in 300 cubic meters of outdoor fresh air every hour and at the same time exhaust 300 cubic meters of indoor dirty air, we say that the number of air changes in this room reaches once.
2. To calculate the air volume required for the refrigeration area of the designed clean room, there are two methods: one is to calculate the fresh air volume required per person per hour, and the other is to calculate the number of air changes required in the space.
(1) Calculated based on the amount of fresh air required per person per hour, and determined according to the number of people who are frequently active in the room. For example, if there are 10 people in the routine operation activities of a dust-free workshop, then the number of people is 10, and the national regulations guarantee that each person is not less than 30 For the fresh air volume of cubic meters, the air volume required by the room of 10 operators in this production workshop is not less than 300 cubic meters per hour.
(2) Calculated based on the number of air changes. Generally speaking, the number of air changes in a family house is generally 1-2 times per hour. In public places, due to the large flow of people, the number of air changes is generally 3-5 times per hour. Please refer to the current " Requirements of GB50736-2012 Civil Building Heating Ventilation and Air Conditioning Design Code.
For special industries, such as operating rooms in hospitals, intensive care wards, laboratories, dust-free workshops, etc., it is necessary to determine a reasonable amount of fresh air required in accordance with the relevant national regulations and the requirements of the clean room industry regulations, and include appropriate residuals. the amount.
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