Calculation rules for ventilation duct engineering quantities
1. The area is calculated according to expansion; the perimeter times the length equals the area, for example, 500*400 is 1000mm long (0.5+0.4)*2* 1=1.8 square meters, the reducer is usually calculated according to the larger end of the pipe diameter.
2. The length of the air duct is based on the centerline length, but does not include the length of the components.
3. The air duct deflector is calculated according to the area of ??the blades as shown in the figure.
4. The size of the hose is calculated in square meters according to the size shown in the figure. Extended information
Air ducts are mainly used in industrial and construction projects. The application areas mainly include: electronic industry dust-free workshop purification systems, pharmaceutical and food sterile workshop purification systems, hotels, shopping malls, hospitals, factories and office buildings. Central air-conditioning systems, exhaust ducts for dust removal, smoke exhaust, and oil suction for industrial pollution control, air supply ducts for industrial environment or workplace comfort, gas drainage systems for coal mine gas drainage, and air return and return systems for coal mine environment control. ..etc.; PS: It is often developed as a special route for escape and infiltration in movies, TV shows and animations.
Divided by use
1. Air ducts for purification air conditioning systems: galvanized sheets, stainless steel; (glass fiber reinforced plastics and composite materials that may cause dust pollution during use are prohibited)
2. Air ducts for central air-conditioning systems: galvanized sheets, color steel insulation boards; (glass fiber reinforced plastics, composite materials can be used)
3. Air ducts for environmental control systems: galvanized sheets, Stainless steel; (Plastic, FRP, and composite materials can be used)
4. Air ducts for industrial ventilation systems: steel plates, galvanized sheets; (Libo ventilation ducts. Plastic, FRP, and composite materials can be used)< /p>
Note: FRP air ducts can be divided into two types: organic and inorganic. According to the design specifications, organic materials are prohibited according to fire protection requirements;
5. Air ducts for special occasions: mining tape Hair dryer, mining plastic ventilation duct; (requires flame retardant and anti-static mining safety properties)
Baidu Encyclopedia - Ventilation duct