Thermal comparison of dry hanging insulation system

China's energy prospects are worrying. The contradiction between energy demand is unprecedentedly sharp. The real estate development industry, which consumes large energy consumers and energy-saving blind spots, has inevitably become a hot spot of concern to the whole society. Governments at all levels in China have introduced corresponding systems and norms to enforce them. Building energy conservation is being carried out intensively throughout the country. The external thermal insulation technology has become the mainstream of China's building energy conservation, while the external thermal insulation of the external wall represents its future development direction with its unique advantages.

In the field of building energy conservation, the external wall insulation system is mainly used in the field of public building energy conservation. According to reports, at present, the construction area of ​​civil houses built in cities in China is about 1 billion m2 per year, of which public buildings are about 3.4 billion m2. According to experts, the energy consumption of large-scale public buildings in China is about 10 times that of ordinary residential buildings. It can be seen that the energy saving potential of public buildings is huge. The comprehensive national standard public building energy-saving design standard for the first public building energy-saving design approved by China in July 2005 was officially implemented. The standard is applicable to the energy-saving design of new buildings, expansions and alterations. The energy-saving goal and approach is to improve the efficiency of lighting equipment by improving the energy-saving ratio of heating, ventilation and air-conditioning equipment and systems by improving the insulation and thermal insulation properties of building envelopes. Under the conditions of ensuring the same indoor thermal environment comfort parameters, the total energy consumption of heating, ventilation, air conditioning and lighting can be reduced by 50% compared with the public buildings designed in the early 1980s. The external thermal insulation system is the most excellent external thermal insulation system in the external insulation system of the external insulation system in terms of thermal insulation and heat insulation of the building envelope. However, not all dry-hanging systems can achieve the desired effect. In-depth comparative analysis of the energy-saving status of the heat-dissipating dry-hanging insulation system and the ordinary dry-hanging insulation system.

1 Application status of various types of dry-hanging external wall thermal insulation systems (common analysis of several installation nodes) Stone dry-filled external wall thermal insulation system The existing dry-wall external thermal insulation system currently exists in the market according to the system's facing materials Can be classified as stone dry hanging external wall insulation system, aluminum plate dry hanging external wall insulation system, fifth wall, inorganic pre-coated decorative board dry hanging external wall insulation system and color steel plate dry hanging external wall insulation system, etc. The assembly method of thermal insulation materials can be divided into prefabricated dry-hanging external wall thermal insulation system and on-site filled external thermal insulation system. At the same time, according to the treatment of cold and hot bridge, it can be divided into thermal insulation dry insulation system and ordinary dry insulation system. There are many types of dry-wall external insulation systems, but not all of them can achieve the expected energy-saving effect. We need to conduct in-depth analysis.

13mm thick aluminum plate with a heat transfer area of ​​3 4, 卯Omm2, if there is a reinforced rib, it needs to be increased. 5 coefficient, thermal conductivity A=23aOW/mIQ cross section air layer T thermal resistance Ra=0,090m, K/W: section 3 steel keel system and XPS layer, keel system heat conduction and product 400kL24mm:, 25mm thick XPS layer Thermal conductivity A-0.029W/mK, thermal conductivity Af60.t>0W/mK, due to the relationship between each of the f side of 20% of the wall exposed to the air layer; Thermal resistance Ra section 13tnm thick aluminum plate t heat conduction area 3x increase L5 coefficient, thermal conductivity 4 thermal coefficient A - Address: 8th Floor, No. 8 Lane 1147, Siping Road, Shanghai (200092)


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