Insulation characteristics and application of CS sandwich wall panel

CS lightweight insulation sandwich panel (hereinafter referred to as CS wall panel) is called steel mesh polystyrene composite insulation sandwich wall panel. It is a three-dimensional space steel grid sandwich wall panel manufactured in the factory, which is divided into bearing capacity. Type and non-bearing. The board is made of heat-insulating material such as flame-retardant polystyrene foam (or mineral wool), and is made of a low-carbon cold-drawn steel wire mesh with a diameter of 2.03.5mm on both sides, and the middle obliquely inserted belly wire is welded. The outer layer is double-sided cement mortar or fine stone concrete 3035mm (see). The two-way oblique wire and the whole core plate are used to improve the overall rigidity of the sandwich panel, which is beneficial to on-site assembly and prevent the movement of the core. It has light weight, high strength, heat preservation, sound insulation, fireproof and shock resistance. Good and easy to install.

Insulation characteristics of 1CS wallboard The core of CS wallboard is made of polystyrene foam or mineral wool. These materials have many small voids inside, and the small gaps are so small that the gas cannot form obvious convection. It is precisely because these materials contain a non-flowing gas with a very small thermal conductivity, which makes the thermal resistance of the CS plate larger. After testing, the load-bearing wallboard (polystyrene core plate thickness 50 ~ 1.49, insulation board (poly PTFE core thickness) 30~40ram) thermal resistance is 1.01~1.15. Table 1 compares the thermal resistance and heat transfer coefficient between CS wallboard and other two kinds of walls. It can be seen from Table 1 that CS wallboard can achieve good thermal insulation effect. Improve the indoor thermal physical environment, which is embodied in the following aspects.

1.1 Enhance indoor comfort When the indoor heat dissipation device releases heat, the surrounding air rises due to heat. On the contrary, the air in contact with the outer wall is cooled by the cooling, so that the indoor air Li Ying (1962-), female, Hunan Cili, associate professor, engaged in the research and teaching of the building physical environment.

Gas formed convection. At this time, the lower the temperature of the inner surface of the outer wall, the lower the air will feel the head is hotter and the feet are colder. If the CS wall panel has a good tendency to be strong, the temperature distribution of the indoor air will be stronger. The more uneven the heat performance, the lower the difference between the upper and lower temperatures is only 51C, which improves the indoor temperature environment. When the thermal resistance of the external wall is small, the temperature difference between the lowest and the lowest is about 丨5. The heat resistance and heat transfer coefficient of several types of walls in Table 1 are compared with the wall type H 490mm thick brick wall 200mm thick aerated concrete block wall 240mm Thick brick wall external 50mm thick CS insulation board heat transfer coefficient (W / m2-k) 1.2 to prevent condensation on the inner surface of the outer wall. The inner surface of the outer wall is exposed due to the temperature of the inner surface of the outer wall below the dew point temperature of the indoor air. . Condensation is easy to form when the thermal resistance of the external wall is small and the humidity of the indoor air is large, especially at the intersection of the thermal bridge and the outer wall. Condensation can lead to increased heat consumption and easy wall damage, affecting the normal use of the building. In order to avoid condensation, the temperature of the inner surface of the outer wall should be set at the dew point of the indoor air. For this reason, the outer wall must have the necessary thermal resistance. The CS wall panel can be used for the inner and outer insulation of the outer wall, and the surface temperature of the wall can be raised by increasing the thermal resistance of the wall to effectively prevent condensation.

1.3 Saving energy and improving efficiency With the continuous improvement of energy prices, heating charges have increased in various places. Due to the massive burning of coal, environmental pollution has also occurred, causing damage to the ecosystem, affecting and restricting the development of social economy. Therefore, building energy-saving standards put forward higher requirements for the insulation and energy conservation of the envelope structure. If the previous wall insulation method is still used, it will be difficult to meet the requirements of the new standard. Compared with the frame light structure and the brick-concrete structure with the same building area, the CS wall panel has a heat consumption tt reduction of 20% to 30%, and the use area is increased by 5% to 8%. In housing, there are obvious economic benefits. For example, an ordinary residential building in Hailar City, Inner Mongolia Autonomous Region, with a construction area of ​​9900 m2, an outdoor average temperature during heating period C=-14 (heating period 210d); indoor juice temperature = 20, consider the following three options when designing, see Table 2. As can be seen from the table, CS wall panels can achieve good energy-saving effects whether they are used as exterior walls or wall insulation.

Table 2—Residential residential buildings adopt different external wall forms Heating heat load comparison item R Exterior wall form 490mm thick brick wall 240mm thick brick wall external 50mm thick CS insulation board CS wall panel Thermal load during heating period (W) One heating period The required standard coal (T) unit area coal consumption (kg / m2) heating standard coal cost (according to 250 yuan / T) wall, balcony energy-saving transformation has a unique advantage. With the development of wall reform in China, CS wallboard has high promotion value and broad application prospects due to its excellent thermal insulation and energy saving characteristics.

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