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Shanghai World Expo can be described as the International Exhibition of Buildings. More than 230 buildings have become the great practice and the highest level display platform for new ideas, new materials, new technologies and new designs for energy-saving buildings.
The history of the World Expo reflects the characteristics of the times. Tang Shifang, deputy director of the Shanghai World Expo Bureau's Technology Office, introduced the obvious characteristics of the times in the exhibition and application technology of the Shanghai World Expo, which are innovative applications of energy-saving, ecological, and environmental technologies. The first is the use of solar energy, solar photovoltaic power generation, the entire park has 4.6 megawatts of equipment, solar collectors and solar thermal power generation. The second is that all buildings use thermal insulation materials, and many also use ecological technologies. Four venues, including the Expo Center, have been rated as three-star green buildings. The third is the demonstration of new energy vehicles. There are 1,000 new energy vehicles in operation in the park. The fourth is the use of Jiangshui source and ground-source heat pump technology, and the unprecedented scale of the use of large-scale air-conditioning refrigeration of approximately 600,000 square meters is provided by river water sources and ground source heat pumps. Fifth, the innovative application of new chemical materials will provide architects with new ideas. The German Pavilion will be covered with a layer of innovative polymer Mesh and the Italian Pavilion will be made of transparent concrete.
Tang Shifang said that there will be a trend of large-scale development of green buildings and ecological buildings. The United Kingdom has already proposed legislation that all buildings after 2016 must be green buildings. The United States also has provisions in this respect. At present, the Chinese government is vigorously promoting the requirement that all buildings must achieve Energy saving target. The wider application of energy-saving, ecological and environmental technologies will become a new opportunity for the development of construction chemical materials in the post-World Expo.
However, the task of advancing energy conservation construction is arduous. One of the bottlenecks currently facing is industrial policy issues, and the second is technical and regulatory issues. It is reported that our government has accelerated the pace of building energy conservation. Lu Shanqian, an expert on the new wall and building energy-saving materials subcommittee of the Shanghai Building Materials Industry Association, said that in recent days, the state has issued two drafts of energy-saving design standards. The first is the construction standards in the Xia Leng and Dong Wen districts, and it is based on the actual situation in the area. Adjustments, in particular, impose mandatory requirements on the energy conservation of doors and windows; second, it proposes the design standards for the renovation of existing residential buildings, and the energy-saving reconstruction of residential buildings will be implemented step by step. The “Regulations on the Administration of Building Energy Conservation in Shanghai†is about to be introduced. It is understood that only 20% of the 860 million square meters of buildings in Shanghai belong to energy-saving buildings.
Some experts at the forum proposed that there are three contradictions in the energy conservation of buildings. The first is the contradiction between the common life cycle of building energy-saving materials and constructions. Now commonly used organic and inorganic insulation materials, its life cycle is 25 to 30 years, but the building's reasonable use life is 70 to 100 years. Second, the contradiction between existing energy-saving materials and fire protection requirements. Our country stipulates that public buildings must have Class A non-combustible materials on the external walls above 50 meters. However, at present, the most commonly used energy-saving materials can reach Class A standards. Third, vigorously promote the contradiction between building energy conservation and urban security. Some strong insulation materials with relatively low strength and density are affixed to rigid bricks. It is not known how long the firmness of the tiles can be ensured. After a few years, the bricks in high-rise buildings will not cause any hidden dangers in urban security. In this regard, experts suggest that the chemical building materials industry and the architectural design industry should jointly join forces to resolve and resolve.
Chemical materials will play a leading role in building energy efficiency
The "2010 World Expo Construction, Building Materials, Energy Saving, Low Carbon Concept and Practice" international forum was held in Shanghai recently. More than 150 experts, scholars, entrepreneurs, government officials, and association developers made wonderful speeches and interactive exchanges. They vividly demonstrated the powerful vitality of new energy-saving technologies and new chemical materials in building energy-saving industries and future urban development. The amplification effect of the Green Expo and the low-carbon Expo is emerging.