In the context of increasingly severe global warming, energy conservation and emission reduction have become the consensus of human society. As one of the main sources of energy consumption and carbon emissions, the transformation and upgrading of the construction industry is particularly critical. As an advanced energy-saving building concept and technology, ultra-low energy consumption building is gradually becoming an important direction for the green development of the construction industry.
1. Definition of ultra-low energy buildings
Ultra-low energy buildings, as the name suggests, refer to buildings that consume very little energy during the operation of the building. These buildings minimize energy use while providing a comfortable and livable indoor environment through the use of efficient energy-efficient technologies, materials and intelligent systems.
2. Characteristics of ultra-low energy buildings
High efficiency and energy saving: Ultra-low energy consumption buildings are designed with energy saving needs in mind, and the layout, orientation, and shape coefficient of the building are optimized to minimize energy consumption.
Superior thermal insulation performance: The building envelope structure such as walls, doors and windows adopts high-performance thermal insulation materials to effectively reduce heat transfer and loss.
Advanced ventilation and airtightness design: While ensuring indoor air quality, the penetration of hot and cold air is reduced through efficient fresh air system and airtightness design.
Renewable energy utilization: Make full use of renewable energy sources such as solar energy and geothermal energy to provide clean and sustainable energy supply for buildings.
Intelligent management system: The intelligent control system is used to monitor and control the energy use of the building in real time to ensure that the building runs in the optimal energy consumption state.
3. Advantages of ultra-low energy buildings
Environmentally friendly: Ultra-low-energy buildings significantly reduce dependence on fossil fuels, reduce greenhouse gas emissions, and contribute to mitigating global climate change.
Economic benefits: Although the initial investment of ultra-low energy buildings may be slightly higher than that of ordinary buildings, the long-term operating costs are greatly reduced, and the overall economic benefits are significant.
Improved comfort: Through precise environmental control and optimization, ultra-low energy buildings can provide a more comfortable living environment for their occupants.
Technology demonstration effect: Ultra-low energy buildings demonstrate advanced energy-saving technologies and design concepts, which play an important role in promoting technological progress and green transformation of the entire construction industry.
4. Application of polyurethane in ultra-low energy consumption buildings
Exterior walls and roofs: A large number of high-quality thermal insulation materials are used on the exterior walls and roofs of buildings to prevent the external heat from entering the room in summer and the loss of internal heat in winter. The upper and lower layers of the sandwich insulation board of the exterior wall are made of reinforced concrete, and the intermediate insulation layer is made of polystyrene board or polyurethane material.
Doors and windows: the application of polyurethane in doors and windows mainly comes from the door frame, polyurethane composite materials have good expansion and contraction performance, good weather resistance, and the appearance can form a wooden appearance after painting, and the trend of replacing broken bridge aluminum with polyurethane composite materials is obvious.
source：chem366.com
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