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/ Energy consumption analysis and energy-saving research of building glass curtain
Energy consumption analysis and energy-saving research of building glass curtain
10-29-2024
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The application of glass curtain walls in construction has become a major development trend in the construction industry. Effective design is carried out for building glass curtain walls to ensure that they can achieve green and energy-saving. Therefore, in practice, it is necessary to analyze the causes of the high energy consumption of glass curtain walls based on their characteristics, and take effective treatment measures according to the causes, clarify their design points, improve their structural methods, select glass materials, actively adopt various emerging technologies, and strive to continuously improve the energy-saving design effect of curtain walls.
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1. Problems in the practical application of glass curtain walls
Glass curtain walls are increasingly being used in modern buildings. Their use not only elevates the overall level of the building, but also lays the foundation for further urban development. However, various problems may arise in the application of glass curtain walls, such as safety issues. The overall energy consumption of glass curtain walls and the various problems that exist in their use not only pose safety hazards, but also lead to energy waste, which is detrimental to the healthy development of the construction industry. Therefore, we need to start analyzing some of the problems that arise in glass curtain walls and propose effective solutions to make building glass curtain walls greener and more energy-efficient.
2. Construction technology of energy-saving glass curtain wall
2.1 Preparation and Inspection of Construction Materials
In the preparation of construction materials, the energy-saving construction materials that best meet the actual needs should be selected based on the building's service life, construction technology, and construction costs, as well as the comprehensive performance of the construction materials. Among them, the key construction materials for glass curtain walls include glass materials and aluminum alloy insulation materials, and the selection of these two key materials can directly affect the overall energy-saving effect of the glass curtain wall. The commonly used energy-saving glass materials currently include Low-E, hollow, and heat absorbing glass materials Low-E glass material: This type of glass material mainly includes two types: low radiation and heat reflective glass. Its focus is on reducing indoor energy consumption by reflecting light, which can lower the radiation on the surface of the glass and save indoor energy consumption. The disadvantage is the possibility of interfering with indoor lighting effects Hollow glass material: This material is formed by bonding two pieces of glass together. Due to its hollow interior, it can effectively reduce indoor heat dissipation, have good insulation and energy-saving effects, and can effectively reduce outdoor noise; ③ Heat absorbing glass material: This type of glass material is mainly obtained by doping metal ions into the glass body. Its advantage is that it can effectively absorb light and heat energy and present multiple colors, reduce the amount of light entering the room, and achieve the goal of saving indoor energy consumption. Aluminum alloy insulation material belongs to the frame part of glass curtain wall. In the past, due to the high heat loss of the columns and aluminum alloy beams inside the glass curtain wall, its overall insulation performance was reduced. Aluminum alloy insulation materials are used inside the glass curtain wall, which integrate insulation materials into the aluminum material to reduce heat loss, effectively enhance the overall insulation effect of the glass curtain wall, and ensure its energy-saving effect.
2.2 Construction surveying and setting out
① Inspect the baseline delivered by the construction unit Set the standard line: Move the indoor elevation line to the working surface of the exterior wall on each floor and carefully inspect it; Before laying out, obtain corresponding data by measuring the external dimensions of the structure and set a reference line Using the standard line as a reference, mark the grid lines on the wall according to the design drawing After marking the grid lines, check whether the location of the embedded parts is consistent with the design. If not, adjust it in a timely manner Two steel wires with a diameter of 0.5~1.0mm should be pulled in both the horizontal and vertical directions of a single curtain wall as construction control lines. One horizontal wire should be provided on each floor (if the width is large, a fulcrum should be set up every 20m to prevent the wire from falling), and one vertical wire should be provided every 20m When laying out, comprehensive consideration should be given to the deviation of the civil engineering structure, and the deviation should be subdivided to avoid cumulative deviation; The connection position with other decorative surfaces should be determined; The pulled steel wire should be marked at the endpoint position, and once there is an abnormality in the steel wire, it can be quickly pulled up again; The layout should be carried out according to the design requirements; Pay attention to the control of the baseline.
2.3 Construction of Clear (Hidden) Frame Glass Curtain Wall
In the actual installation process, construction should be strictly carried out in accordance with the specifications, and the position of the embedded parts should be checked. Once any non-compliance is found, it should be adjusted immediately and reinforced. After the above procedures are completed, the installation of the components of the glass curtain wall can begin. After the completion of the block construction, install the framework of the curtain wall. If the design drawings have requirements for fire performance, additional fireproof cotton should be installed. After the concealed construction quality acceptance is qualified, install the glass panel and finally treat the joints.
2.4 Installation technology of glass curtain wall keel
The keel of the glass curtain wall needs to be connected to the beam and slab. When installing the vertical keel, tension rods are usually used. It is necessary to first connect it to the connecting piece through bolts, and then adjust the position of the bolts to make the vertical position match the floor elevation. Align the horizontal position with the floor layout and measure the distance between the keels; The vertical main keel should be installed from bottom to top, while preventing temperature from affecting the quality of the keel material. After installing the main keel in this direction, the positioning blocks between the vertical frames should be removed, and sealant should be injected into the expansion joints. After all the vertical keels are installed, the installation of the horizontal keels begins. During the installation process, in order to avoid affecting the levelness of the horizontal keels due to incorrect installation positions, installation should be carried out on the premise that the measurement position and the installation position of the horizontal keels can be completely matched. In addition, when installing horizontal keels, it is necessary to immediately carry out calibration and inspection after each layer of keel installation is completed, in order to ensure the levelness of the final multi-layer horizontal keel installation and avoid secondary rework; Reserve a gap of expansion joints between the vertical and horizontal keels to prevent the overall quality from being affected by temperature changes.
2.5 Lightning protection, moisture-proof and insulation measures
During the entire construction process, weather factors must also be considered. Summer is rainy and prone to thunderstorms. In building decoration projects, protective measures should be taken. According to the main structure, lightning protection measures need to be installed on each floor to enhance the lightning protection performance of the building. To ensure that the fire insulation performance of the building meets the relevant national regulations, the fire rating and zoning of the building should be considered during construction, and a suitable and standard fire-resistant layer should be selected. According to the actual needs, select appropriate waterproof and moisture-proof construction process to reduce the impact of losing the effect of fire insulation materials due to humidity. At the same time, use glass foam, non flammable rock wool and other materials to increase the energy saving and fire prevention function of buildings.
2.6 Installation of lightning rods for glass curtain walls
During the construction process of glass curtain walls, based on the actual building structure, the connection points of the lightning protection system are set on each floor and scientifically connected to the embedded parts of each floor, effectively protecting indoor electrical equipment and the overall structure. During the installation process, construction personnel need to inspect the actual connection status between the lightning protection system and the equalizing ring. If they are not fully connected, they need to connect the two by welding, and after welding, inspect the quality of the welding and whether the length of the weld is greater than 80mm.
2.7 Construction technology for glass panels and window sashes
During the installation of glass panels, construction personnel should ensure that they are in a dust-free environment to prevent dust from mixing between glass panels. At the same time, they should ensure that the glass panels and frames are sufficiently clean, which is a prerequisite for ensuring the quality of glass panel connections. To ensure that the protective layer is not damaged, it is placed on the outside of the glass panel. Necessary protective measures should be taken during actual operations to prevent glass panels from falling off and causing safety accidents. During the installation of window sashes, construction personnel must inspect them to ensure that they meet the requirements of the design drawings.
epilogue
In short, energy-saving glass, a new type of curtain wall material, has gradually attracted attention due to its unique advantages. However, some enterprises still have some problems and shortcomings in their construction. The article analyzes the key points of energy-saving glass curtain wall construction technology and strategies for improving construction quality, hoping to provide reference for relevant enterprises in construction operations and effectively improve the construction quality of energy-saving glass curtain walls.
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