With the continuous development of China's social life and the continuous improvement of the construction level of the construction industry, people's demand for renewable energy has increased and increased accordingly. The conflict between energy supply and demand has become more and more prominent. The development and use of new green and environmental protection Energy and energy conservation are the only way to achieve healthy economic development and energy recycling.
Energy conservation is a hot topic in today's world, and building energy efficiency is one of the important contents of all concerns. Building energy efficiency initially refers to “reducing the loss of energy in buildingsâ€; the general connotation now is “in the production of building materials, the construction and use of buildings and structures, to meet the same needs or achieve the same purpose, as far as possible Reduce energy consumption". The energy loss of the building envelope mainly involves three parts: 1 outer wall; 2 doors and windows; 3 roof. These three parts of energy-saving technology are of great concern to the construction industry in all countries. At present, the main development direction of the existing building exterior wall energy saving in China is to develop efficient and economical insulation, heat insulation materials and practical construction techniques to improve the insulation, heat insulation performance and sealing performance of the envelope structure. In terms of energy saving in the wall, the traditional method of increasing the thickness of the wall with a single material to achieve insulation has not been able to adapt to energy conservation and environmental protection.
Required, replaced by a composite wall. The composite wall generally uses reinforced concrete as the load-bearing structure, and is composited with the thermal insulation material, or the thin-walled material is used for the thermal insulation and heat insulation material as the wall in the frame structure.
External wall insulation is mainly based on thermal insulation materials as building envelopes. The development and application of high-efficiency thermal insulation materials is an effective measure to ensure energy conservation in buildings. At present, all developed countries in the world attach great importance to the production and application of thermal insulation materials. The reason why construction energy conservation work is done well is inseparable from their emphasis on and development of thermal insulation materials.
The energy-saving materials for building exterior insulation mainly include: polystyrene foam board (EPS and XPS), insulation cotton (rock wool board and glass wool board), and ultra-light polystyrene pellet insulation slurry. A common feature of the above various materials is that there are a large number of closed holes in the material, and their apparent density is small, which is also necessary as a thermal insulation material.
Energy-saving materials are insulation materials. Insulation material refers to a material or material composite used for building envelopes or thermal equipment, impedance heat transfer, including insulation materials and cold insulation materials. The significance of thermal insulation materials is to meet the thermal environment of building space or thermal equipment, and to save energy. With the increasing intensity of energy worldwide, the significance of thermal insulation materials in energy conservation has become increasingly prominent. For the general air conditioning of residential heating, energy saving can be 50%~80% on the existing basis by using the insulation material. According to Japanese energy-saving practices, every 1 ton of thermal insulation material can save 3 tons/year of standard coal, and its energy-saving benefit is 10 times of the material production cost. Therefore, some countries regard thermal insulation materials as the fifth largest “energy†after coal, oil, natural gas and nuclear energy.
With the in-depth development of building energy conservation work, China's building insulation materials industry has ushered in a rare development opportunity. Whether it is technological innovation, industrial integration and upgrading, or solving problems in the market, technology, standards, policies, etc., it is necessary to gather the strength of the entire industry and work together.
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