How to choose central air-conditioning insulation pipe material

How to choose central air-conditioning insulation pipe material

In the general trend of building energy efficiency and green buildings, the domestic central air-conditioning industry is facing huge opportunities and challenges. Large landmark buildings, CBD business districts, shopping malls, supermarkets, and civil buildings have increasingly stringent requirements for energy-saving central air-conditioning systems.

　　The central air-conditioning system needs to consume a lot of energy, and its energy consumption accounts for about 60% of the total energy consumption of the entire building. Therefore, the air-conditioning system needs to save energy and save operation investment. Reasonable selection of suitable insulation materials and strict control of insulation construction are important ways to save energy in air conditioning systems. The main performance indicators of thermal insulation materials are as follows: thermal conductivity, density, moisture resistance factor, fire resistance, installation performance, etc.

　　1, thermal conductivity

Thermal conductivity is the basic index to measure the quality of thermal insulation materials, which determines the thermal insulation performance of materials. Generally, materials less than 0.2W/(m?k) can be used as thermal insulation materials. GB/T17794 clearly stipulates that: Thermal conductivity is not more than 0.041W/(m?k); at 0℃, the thermal conductivity of insulation material is not more than 0.036W/(m?k); at -20℃, the thermal conductivity of insulation material is not more than 0.034W/(m ?k). At the same time, the thermal conductivity is also an important parameter that determines the thickness of the insulation layer. When the insulation thickness of the pipeline is not selected properly, condensation will form on the outer surface of the insulation layer, which will cause dripping on the surface of the air pipe and moldy on the ceiling, which will seriously affect the indoor air supply environment.

At present, the third-generation rubber-plastic foaming technology is commonly used in the market. When the air-conditioning insulation material is at 0℃, the thermal conductivity is as low as 0.032W/(m?k), which can effectively isolate the air-conditioning piping system from the external environment. exchange. With Dukane's professional selection calculation and professional installation guidance team, it can ensure that the entire system has zero condensation.

　　3, moisture resistance factor

　　 Moisture resistance factor is a key indicator to measure the resistance of insulation materials to water vapor penetration, and determines the service life of the materials. GB/T17794 clearly stipulates that the moisture resistance factor μ of insulation materials is not less than 1500. With the increase in the number of years of use, the material with a small moisture resistance factor is more likely to penetrate water vapor, resulting in a sharp increase in the thermal conductivity of the thermal insulation material, thereby losing the thermal insulation effect. Therefore, open-pored thermal insulation materials such as glass wool need to be laid with a moisture-proof layer to extend the service life of the material.

　　The air-conditioning insulation material using the third-generation rubber-plastic foaming technology has a fully closed bubble structure and a moisture resistance factor of more than 10,000, which almost eliminates water vapor penetration and can ensure long-term stable thermal conductivity.

　　3, fire performance

　　 Fire performance compliance is the basic requirement for the safety of thermal insulation materials, and the fire protection requirements of pipeline thermal insulation materials must reach the flame retardant B1 level. Choosing insulation materials with poor fire resistance may leave a safety hazard for the entire central air-conditioning system. Once a fire occurs, the fire may spread rapidly and cause huge economic losses.

　　 4. Installation performance

　　 Installation performance is an important factor that determines construction efficiency and construction quality. Improper selection of insulation materials will seriously affect the construction progress and construction quality. Improper installation may also cause the system to produce condensation. Therefore, it is very important to choose suitable and easy-to-install insulation materials.

　　 In summary, the central air-conditioning system selection of suitable thermal insulation materials should comprehensively consider all aspects of performance indicators. The types of insulation materials on the market are uneven, and the performance indicators of the materials must not be ignored in pursuit of price, which will affect the normal operation of the system. In the trend of building energy saving and green building, we choose Dukane's high-quality rubber and plastic insulation materials to make the central air-conditioning system more durable, more energy-saving, more environmentally friendly and safer.