Solar energy technology is adopted in the building, which is safe and effective with low energy consumption, environmental protection, convenient installation and subsequent maintenance, reasonable allocation of manpower and material resources during construction, and prevention of idle projects or equipment.
abstract:
The energy consumption of construction industry is increasing day by day. With the deepening of reform and opening up, the energy consumption of the construction industry ranks first in the country. Facing the resource dilemma, it is particularly necessary to advocate energy-saving technology. This paper analyzes the importance of energy-saving construction technology in building engineering, and introduces the application of energy-saving construction technology in building engineering, so as to provide theoretical reference for energy-saving construction in building engineering.
Key words:
Houses; Construction engineering; Energy saving; Architecture; App application
Building energy efficiency refers to the adoption of energy-saving technologies, equipment and materials from planning and design to new construction, renovation and use to form good thermal insulation performance, improve the efficiency of air conditioning, refrigeration and heating systems, strengthen the operation control of building energy systems, and use renewable energy. First, ensure the indoor thermal environment quality, increase the exchange resistance between indoor energy and outdoor energy, and avoid supplying hot water to heating systems.
Importance of energy-saving construction technology in 1 building construction project
Housing construction needs to consume a lot of energy. 20 13 summer residential building energy consumption report shows that residential building energy consumption accounts for about half of the total energy consumption in China. Some experts believe that if energy-saving housing is fully implemented, it can save about 335 million tons of standard coal, which is equivalent to the full capacity of four and a half Three Gorges hydropower stations, making China's energy sustainable cycle longer, which is a road of sustainable development [1]. At present, China's housing construction industry is developing rapidly, and the total number of new houses in China far exceeds that of developed countries in Western Europe. In residential construction, high-energy buildings account for about 95%.
The energy consumption of a large number of residential buildings is too large, exceeding 65% of the total energy consumption of residential buildings. The implementation of energy-saving buildings meets the development needs of our country, caters to the trend of the times, relieves the pressure of energy shortage, and promotes economic and social development. With the development of the times, people are more and more aware of the air pollution caused by fuel combustion, and developed countries in western Europe have successively introduced energy-saving policies.
Coal combustion will produce pollution gases, such as carbon dioxide, sulfur dioxide, inhalable particles and so on. Especially carbon dioxide is easy to cause? Greenhouse effect? , causing the sea level to rise and bring hurricanes. Carbon monoxide is a toxic gas, which makes people lack oxygen and hinders the combination with red blood cells. If there is too much carbon monoxide in the body, it is easy to produce poisoning. Sulfur dioxide is a component of acid rain, which will corrode houses, destroy plants, lead to the extinction of many species and damage cables. Inhalable particles hinder human breathing, which is the main cause of smog at present. China is a big energy consuming country, and a large amount of energy depends on coal, which causes great pollution to the atmosphere. A typical example is the smog around the world. Building energy conservation helps to reduce air pollution.
The popularization and application of building energy efficiency has reduced the total energy consumption and the contents of sulfur dioxide, carbon dioxide and inhalable particles in the process of building construction. Reduce the occurrence of acid rain and smog, slow down global warming, promote plant growth, control sea level change, and avoid further melting of glaciers in the North and South poles. Building energy efficiency improves the thermal environment quality of buildings and protects the environment better.
2 Analysis of the application of energy-saving building technology in housing construction engineering
2. 1 application analysis of energy-saving construction technology for external wall of building engineering
Cracks in building structure, waterproof and breathable external thermal insulation system and other factors affect the thermal insulation of building walls, which need the attention of the construction unit of building external walls. The external wall insulation effect is more prominent than the internal wall insulation effect. However, the bonding effect is not ideal and the cost is high. Often due to unreasonable construction, external wall insulation construction is particularly important, which requires the following work:
(1) Energy-saving construction of building wall. According to the construction design drawing, draw the brick arrangement drawing. The construction department fully combines thermal resistance and cracks in the construction, and applies the whole brick leveling method to the masonry of hollow brick load-bearing walls. If the whole brick is not enough, do not chisel hollow bricks, but use external solid bricks to ensure the overall construction quality and avoid subsequent wall dislocation.
(2) Selection of thermal insulation materials. There are many common thermal insulation materials in building construction, which are usually divided into polystyrene particle thermal insulation slurry and aerated concrete autoclaved fly ash. The polystyrene particle thermal insulation slurry is easy to make, and the unused polystyrene plastic can be processed into 0.5 ~ 4 mm particles to deal with external wall cracking. Autoclaved fly ash, added with aerated concrete, is a new wall material with good thermal insulation effect, environmental protection and no pollution.
(3) Concrete construction of external wall insulation. Taking the architectural design drawings as a reference, firstly, remove the impurities at the base of the external wall, determine the position of doors and windows and the center line of the wall, and first, construct at both ends or corners of the wall. Hollow brick staggered masonry adopts 1: 3 cement mortar, and corner protectors around doors and windows are not allowed to be squeezed, and 50mm thick cement mortar is used. After the completion of masonry, immediately clean the brick joints, and reserve a 5mm deep groove in the brick joints. Pay attention to the management of construction site. Don't touch the masonry wall to prevent the cavity and mortar from flying out. Handle heat preservation and moistureproof work.
2.2 Analysis of the application of energy-saving technology in the construction of doors and windows in housing construction projects
The heat transfer coefficient of plastic doors and windows and wooden doors and windows is about 30% lower than that of aluminum doors and windows, and that of double glass is about 40% lower. In order to achieve the goal of energy saving in building construction, it is necessary to consider the actual situation, reasonably select doors and windows, and check the rainwater leakage and wind pressure resistance for many times. Door sash is not closed or severely deformed and cannot be installed; Door and window frames, beams, columns, etc. Cement mortar shall be used for sealing. Doors and windows with large thermal resistance, low energy consumption and few energy-saving materials have good thermal insulation effect. Clean the joint first, then squeeze sealant or stick sealing strip. Glass windows are mainly used for lighting and are included in the properties of glass windows. Combined with parameter analysis, it is found that it is best to choose double-layer glass, reflective glass and other characteristic glasses for window glass.
2.3 Application Analysis of Energy-saving Roof Construction Technology in Housing Construction Engineering
Roof energy-saving technology is mainly to set insulation materials between the roof panel and the waterproof layer, and must choose insulation materials with low density, good strength, low water absorption and low thermal conductivity. At present, there are many materials used as the above thermal insulation materials, which are subdivided into plate materials and on-site foaming casting. The waterproof layer is laid under the insulation layer by the roof reverse paving method. Although the waterproof layer has good protection effect and convenient construction and maintenance, it needs high cost. High-efficiency thermal insulation materials are used to set ventilation and thermal insulation layers and reflective layers on the upper and lower parts of the roof structure. , can better insulate the roof.
2.4 Analysis of the application of solar energy technology in residential construction projects
Solar energy is a kind of non-renewable clean energy, which is applied in all walks of life, and this technology is also used in building construction. Solar energy has many advantages of energy saving and environmental protection: solar energy technology can provide heating and meet the daily heating requirements of buildings; The solar cell power generation system is installed on the roof of the building to convert heat energy and generate electricity. Electric energy is stored by storage batteries and connected with power supply facilities to provide power services for buildings. Solar technology can save energy by controlling lighting [3]. Solar energy technology is adopted in the building, which is safe and effective with low energy consumption, environmental protection, convenient installation and subsequent maintenance, reasonable allocation of manpower and material resources during construction, and prevention of idle projects or equipment.
2.5 Analysis of the application of energy-saving technology in the ground construction of housing construction projects
The ground construction mainly adopts the construction technology of radiation heating and moisture-proof protective layer. Heat preservation materials should be used in the construction of moisture-proof protective layer to prevent the influence and destruction of external moisture on the ground; Control the indoor air temperature within a certain range, and control the temperature according to the construction situation to better preserve the water content of the insulation layer; Moisture in the air will have an impact on ground materials or underground surfaces, and microporous materials are usually used as surface materials to weaken this impact. In the construction of radiant heating, laying insulation layer on the ground, keeping the ground dry, clean and flat, and ensuring the compactness of the surface layer and insulation layer are the basic work of ground construction; Carry out ground construction in strict accordance with the design, and ensure that the filling layer on the surface of the wooden floor is dry after construction; After the ground construction, do a good job of acceptance and recording.
3 Conclusion
It is of great significance to adopt energy-saving technology and save energy in building construction. Housing construction units should consider the actual construction, do a good job in energy-saving design, strictly control the selection and use of materials, be familiar with energy-saving technologies in each process, maintain construction safety, avoid excessive construction energy consumption, improve the construction level of construction projects, and promote the effective and stable development of China's construction industry [4].
References:
[1] Tong Zhijuan. Importance of building energy saving and analysis of key points of construction technology [J]. Jiangxi Building Materials, 20 14(23).
[2] Wang Qiang. Application of energy-saving technology in building construction [J]. Jiangxi Building Materials, 2015 (04): 95,99.
[3] Zhao Haibin. Study on the Application of Energy-saving Technology in Residential Construction [J]. China Dwellings (Next Period) 20 14(04):269.
[4] Zhao On the importance of building energy saving and the key points of construction technology [J]. Doors and Windows, 20 15(03):45-46.
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