The number of air changes = ambient air supply volume/ambient volume, the unit is times/hour. The number of air changes is not only related to the nature of the air-conditioned room, but also to many factors such as volume, height, location, method of air supply and degree of deterioration of indoor air. empirical coefficient.
The number of air changes can be calculated from the following formula: n=Q/V
In the formula, n: the number of air changes in space, times/h. ;
Q —Ventilation volume, m3/h;
V—Room volume, m3;
Detailed information
Summary of ventilation times
1. Boiler room: ?
The normal ventilation volume of an oil-fired boiler room must be ≥3 air changes/h, and the accidental exhaust volume must be ≥6 times/h;
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Gas boiler ≥6 times/h, accidental exhaust ≥12 times/h.
2. Engine room:
The protection area after the gas fire extinguishing system extinguishes the fire must be ventilated. The underground protection zone and the overhead protection zone are without windows or. Fixed window frames must be equipped with a mechanical exhaust. Wind, ventilation frequency of communication equipment rooms, electronic computer rooms and other places should be ≥ 5 times/h (protection area)
3. :
Special storage container for carbon dioxide If the room does not have natural ventilation conditions, a mechanical exhaust device should be installed. The height of the exhaust outlet from the ground should be ≤0.5m and should be directly. connected to the outside. Air changes must be 4 times and 8 times/h (accident) (clearance).
4. Water pump room:
Ventilation of the pump roomfire must be designed at 6 times/h.
Baidu Encyclopedia - Number of air changes
The purpose of establishing an exhaust in the electrical distribution room:
1. During the use of the power distribution room, high and low voltage power distribution cabinets, contact bus bars and transformers will generate heat. The power distribution room will be stuffy and the air quality will become. very mediocre. Therefore, only indoor and outdoor mechanical ventilation is required. But there is no need to force it towards the roof.
The generator room and the power distribution room are completely different:
1. When using the generator, the diesel generator will generate a lot of heat;
p>2 In the process of burning diesel and converting it into energy, a diesel generator will consume a lot of heat;quantity of oxygen, will produce carbon dioxide and make the air worse.
The evacuation functions of the generator room and the distribution room are therefore different and must be evacuated directly to the roof.
In summary, a well cannot be shared.