The most popular energy-saving transformation of e

2022-08-06
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Energy saving transformation of existing buildings is the main battlefield for energy-saving people in the future. First, the potential analysis of energy-saving transformation of existing buildings in China statistics show that the construction area of new buildings in urban and rural areas in China is nearly 2billion square meters every year, of which more than 80% are high energy consuming buildings. There are nearly 40billion square meters of existing buildings, more than 95% of which are high-energy buildings. Building energy consumption has accounted for 40% of China's total energy consumption. Building energy conservation has become the key object of energy conservation and emission reduction. The energy-saving transformation of existing buildings has great potential for energy conservation and emission reduction

at present, the goal of prohibiting the use of solid clay bricks has been basically achieved in urban areas across the country, and the proportion of new wall materials has reached 55%. The production and application pattern of new wall materials based on non clay porous bricks, light wall panels and blocks has basically taken shape in the country, and the proportion of building applications has reached more than 65%. New wall materials have been developed rapidly and have occupied a leading position in wall materials

in fact, the market space brought by building energy conservation is not limited to wall materials. Some experts pointed out that building energy conservation mainly includes: (1) the Ministry of industry and information technology has established an upstream and downstream cooperation mechanism to improve the thermal resistance and tightness of the enclosure structure in three aspects: exterior wall, roof, doors and windows, so as to achieve the purpose of saving energy consumption in building use

during the "12th Five Year Plan" period, the national policy attaches great importance to building energy conservation, so that related industries such as thermal insulation materials face unprecedented opportunities, and a trillion yuan building energy conservation market will accelerate the formation

during the 12th Five Year Plan period, building energy conservation has undertaken more than 20% of all energy conservation tasks in China. If the energy-saving standard of 50% is implemented and the energy-saving standard of 65% is implemented in some places, it will save 3% a year by 2020. 5.4 billion tons of standard coal, accounting for 30% of the national energy conservation goals and tasks in the same period. 7%。

at present, the existing building area in China exceeds 50billion square meters, more than 90% of which are high energy consuming buildings, and the proportion of urban energy-saving buildings in the existing building area is only 23. 1%。

if the same indoor comfort is achieved, the energy consumption per unit building area in China is two to three times that of developed countries with the same climatic conditions. Whether it is the actual pressure of resources and environment, or the urgent requirements of the masses for the comfort of the living environment, the energy-saving transformation of existing buildings is inevitable

the energy-saving transformation of existing buildings is a comprehensive energy-saving transformation aimed at energy consumption systems such as building envelope, air conditioning, heating, ventilation, lighting, power supply and distribution, and hot water supply. In view of the different climatic characteristics and forms of energy use in the north and south, the state has issued the implementation opinions, technical guidelines and fund reward and subsidy measures for the energy-saving transformation of existing residential buildings in northern heating areas, hot summer and cold winter areas, and hot summer and warm winter areas

according to the plan, during the 12th Five Year Plan period, more than 400million square meters of heating metering and energy-saving transformation of existing residential buildings in northern heating areas, 50million square meters of energy-saving transformation of existing residential buildings in hot summer and cold winter and hot summer and warm winter areas, and 60million square meters of energy-saving transformation of public buildings will be completed

according to the statistics of the Ministry of housing and urban rural development, by the end of October 2014, the heating area in northern China had completed heating metering and energy-saving transformation of existing residential buildings during the 12th Five Year Plan. 500million square meters, fully exceeding the 400million square meters transformation task specified by the State Council. The transformation task plan 1 was issued in 2014. 7.5 billion square meters, 99% completed

in the upcoming "13th five year plan", the prospect of energy-saving transformation of existing buildings will be better, because the construction speed of new buildings is no longer as fast as before, and the national policies related to energy-saving transformation of existing buildings, as the top event of the Western plastic industry, will further increase incentive measures

II. It is imperative to strengthen the thermal insulation and energy-saving transformation of doors and windows.

since the new environmental protection law was officially promulgated last year, industrial enterprises have increased their investment in environmental protection transformation of kiln equipment, and many enterprises have been overwhelmed and closed down. But in addition to industrial energy-saving transformation, more and more urban buildings have also become one of the important links of energy-saving and environmental protection transformation

at present, with the rapid development of science and technology, building energy conservation has become possible. With the gradual implementation of household heating metering in China, the energy consumption in the use of houses is bound to be borne by households to ensure reliable results. Energy conservation and expenditure saving will become the conscious requirements of the majority of residents, and building energy conservation has become the focus of common concern. According to the special plan for energy-efficient buildings in the 12th Five Year Plan, by 2015, the energy efficiency standard for new buildings in cities and towns shall not be lower than 65%, and 95% of new buildings in cities and towns shall meet the building energy efficiency standard

with the continuous decline of temperature, heating boilers in northern cities continue to provide warmth for residents day and night. Although many cities have carried out large-scale boiler transformation before this, the high-intensity work still has a lot of impact on the urban environment

generally speaking, in severe cold areas, in addition to heating, buildings must also fully meet the requirements of thermal insulation in winter, and generally do not consider heat protection in summer. The total heat gain of buildings in severe cold areas includes heating equipment, solar radiation and internal heat gain of buildings (including cooking, lighting, household appliances and human heat dissipation). These heat is dissipated outward through heat transfer of the enclosure structure and the heat loss of the air penetrating outward through the gaps of the doors and windows. The total heat loss of the building includes the heat transfer loss of the enclosure structure and the air infiltration heat loss through the gaps of doors and windows. Among them, the heat transfer heat loss of the enclosure structure accounts for about 70% ~ 80%, and the air infiltration heat loss of the gaps of doors and windows accounts for about 20% ~ 30%. There is still much room for the thermal insulation transformation of building doors and windows

in severe cold areas, it is hoped that the outdoor short wave heat energy in the white angel can be more radiated indoors, and the indoor long wave heat energy can be avoided or reduced at night to enhance the indoor greenhouse effect. Hollow glass can meet such requirements. These glasses include ordinary insulating glass, Low-E insulating glass, multilayer Low-E insulating glass, and even inert gas filled insulating glass, vacuum glass, etc. The research shows that the thickness of the air interlayer should be ≥ 40mm when the double-layer glass window is used, and the heat insulation effect of the air interlayer can be better reflected. Ordinary glass has almost no heat insulation performance, so it is not suitable to be directly used in single-layer residential buildings in cold areas

in addition, during the installation of doors and windows, quality defects will also affect the thermal insulation of doors and windows, and the total operating area will reach more than 1200 mu, affecting the energy conservation of the whole building. During the procurement of doors and windows, the materials of doors and windows with performance marks shall be selected, the material quality inspection report shall be checked, and the appropriate door and window accessories shall be selected. During construction, attention shall be paid to the waterproof treatment of door and window openings. The installation openings of doors and windows shall be trimmed with waterproof mortar and concrete embedded blocks shall be reserved; Pay attention to the sealing quality of foaming agent when plugging; Ensure the painting quality of waterproof coating around doors and windows

the position of doors and windows in the whole building energy conservation can not be ignored. With the improvement of people's pursuit for the beauty and permeability of residence, large opening and floor type doors and windows are more and more widely used, which further increases the proportion of heat dissipation of doors and windows and improves the requirements for the heat insulation performance of doors and windows. We should not only pay attention to the application of new thermal insulation materials, but also strive from the aspects of architectural design and construction process control. With the comprehensive application of door and window materials, sealing and a number of heat insulation technologies, the aesthetics and heat insulation of doors and windows will be continuously improved, which also provides more choices for the design and use of buildings

global glass () Department

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