The traditional air supply pipe of central air conditioning is usually made of iron sheet or glass fiber reinforced plastic on the inner layer, wrapped with thermal insulation materials, and wrapped with aluminum foil on the outer layer, which makes the air supply pipe heavy in weight, labor and time-consuming in construction and installation, poor in appearance, low in air tightness and large in energy consumption. Compared with traditional air ducts, phenolic composite air ducts have the following advantages:
1. Good thermal insulation, which can greatly reduce the heat loss of the air conditioner
The thermal conductivity of phenolic composite air duct is 0.016 ~ 0.036w / (m · K), while the thermal conductivity of galvanized steel duct and FRP duct is much larger. In addition, the unique connection mode of phenolic composite air duct ensures the excellent air tightness of the ventilation system, which is close to 8 times of the galvanized steel duct. Some data show that when the same amount of heat (cold) is transmitted, the heat dissipation loss of galvanized steel pipe is 15%, the heat dissipation loss of FRP pipe is 8%, and the heat dissipation loss of phenolic foam insulation material air pipe is less than 2%.
2. Good silencing.
The interlayer of phenolic aluminum foil composite air duct wall is perforated phenolic foam material plate, which has good noise elimination performance. In the central air-conditioning system, the noise generated by the air-conditioning unit during operation is in the range of 50-79db, which is transmitted through the air supply pipe to form indoor noise. Phenolic aluminum foil composite air duct itself is a very good pipe muffler, and there is no need to set silencing accessories such as silencing cover and silencing elbow.
3. Light weight, can reduce the building load, and easy installation
The weight of phenolic aluminum foil composite air duct is light, about 1.4 kg / m2, while the volume weight of galvanized steel sheet air duct (0.8 mm thick) and FRP air duct (3 mm thick) are 7.08 kg / m2 and 15 ~ 20 kg / m2 respectively, which can greatly reduce the load of the building and is extremely beneficial to the installation of air duct. During installation, only one support is required every 4 m or so to have sufficient supporting force. This greatly reduces the bearing capacity requirements of supports and hangers, making transportation and installation very convenient.
4. Durable and long service life
Galvanized steel plate is easy to rust in wet environment, while glass fiber reinforced plastic is easy to aging and damage. Therefore, the service life of traditional air ducts is not long, about 5-10 years. The service life of the insulation layer wrapped by traditional air ducts, such as glass wool, is only 5 years, while the service life of phenolic aluminum foil composite air ducts is at least 20 years. Therefore, the service life of phenolic aluminum foil composite air duct is more than 3 times that of traditional air duct. In addition, the reuse rate of phenolic aluminum foil composite air duct can reach 60% ~ 80%, while the traditional air duct can hardly be reused.
5. Reduce the floor height
The traditional air duct requires the construction of insulation layer on site, so it requires a certain construction height, which puts forward additional requirements for the floor height of the building. Phenolic aluminum foil composite air duct does not need on-site insulation construction, so it is not necessary to reserve construction space, which can reduce the floor height of the building.
Post time: Aug-12-2022