所以在当前的节能建筑中使用最广泛的节能屋面措施包括种植屋面、架空通风屋

Therefore, the most widely used energy-saving roofing measures in current energy-saving buildings include planting roofs, overhead ventilation roofs, and waterscape roofs. In the design process of the exhibition building, energy-saving design measures for the roof structure need to be solved to reduce the heat transfer between the roof structure and the surrounding environment and reduce building energy consumption. The use of the exhibition building and the characteristics of the building result in a relatively large roof area. Energy-saving design is very important. <br>1. Planting roofs. The planting roof is a modern thermal insulation technology that combines green plants and building roofs in the design and embeds green plants into the roof structure. Green roofs can increase the greening rate of the site, improve the microenvironment of local spaces, and reduce the intensity of heat islands. The use of green planted roofs can prevent the roof structure of the exhibition building from aging during daily use, protect the waterproof layer, and effectively control rainwater penetration. The application of planted roofs in exhibition buildings can reduce the energy consumption of air conditioning and heating, but in the design of planted roofs, the standard value of the roof load must be calculated to meet the structural requirements. <br>2. Overhead roofing. This is the roofing effect used by the Sanya International Convention and Exhibition Center. The design of the overhead roofing is to set an overhead layer above the roof to avoid direct sunlight on the roof, so that wind pressure ventilation is generated between the roof and the overhead layer. In summer, the roof is enhanced in heat dissipation, preventing the roof and Indoor heat transfer is suitable for hot summer and cold winter and hot summer and warm winter areas. <br>3. Water storage roof. Water storage roof is to set a pool on the roof waterproof layer, using the specific heat capacity of water, it can absorb a lot of heat on the roof, and it will also reduce the roof temperature when the water evaporates. However, the water storage house has requirements for the climate, and it cannot be used in areas with low temperature in winter, and the waterproof level of the roof is required to reach grade Ⅲ. The load of the roof structure must also be considered, as well as various other factors. The application of the impounded roof in the exhibition building is very little [[]]. The roof structure of the exhibition building should use materials with a solar radiation reflection coefficient greater than 0.4, and light-colored materials and coatings should be used. Studies have shown that at noontime when solar radiation is strongest, dark roofs have a 35% lower reflectivity than light non-metallic roofs, and roofs with higher reflection coefficients can reduce the energy consumption of indoor air conditioning systems

Therefore, the most widely used energy-saving roofing measures in the current energy-saving buildings include planting roofs, overhead ventilation roofs, waterfeature roofing and so on. In the design process of exhibition building, it is necessary to solve the energy-saving design measures of roof structure to reduce the heat transfer of roof structure and surrounding environment, reduce the energy consumption of buildings, the use function of the exhibition building and the building characteristics lead to the building's roof area is relatively large, the roof energy-saving design is very important.<br>1, planting roofing. Planting roof is the design of green plants and building roofs combined, green plants embedded in the roof structure of modern insulation technology, green roofing can increase the greening rate of the site, improve the micro-environment of local space, reduce the intensity of the hot island. The use of green planting roofing can prevent the roof structure of the exhibition building from aging during daily use, protect the waterproof layer, and effectively control rainwater penetration. The application of planting roof in exhibition building can reduce the energy consumption of air conditioning and heating, but when planting roof design, the standard value of roof load should be calculated to meet the structural requirements.<br>2, overhead roof. This is the Roof effect used by Sanya International Convention and Exhibition Center, the design of the overhead roof is to set up overhead layer on the roof, to avoid direct sunlight roofing, so that the roof and overhead layer between the air pressure ventilation, summer enhance roof heat dissipation, prevent the roof and indoor heat transfer, suitable for use in the hot and cold summer and hot winter heat areas.<br>3, water storage roof. Water storage roof is a waterproof roof on the water tank, the use of water than the heat, can absorb a large amount of heat on the roof, when the water evaporates will also reduce the roof temperature. But water storage houses are not allowed to be used in areas with lower winter temperatures and require the roof to be water-resistant to level III. Also to be considered, there are various other factors, water storage roofing in the exhibition building is very rare application. The roof structure material of the exhibition building should use the material with solar radiation reflectivity greater than 0.4 or more, and use more light-colored materials and coatings. Studies show that dark roofing is 35% less reflective than light non-metallic roofing at the time of the strongest solar radiation at noon, and a higher reflective coefficient can reduce the energy consumption of indoor air conditioning systems.

Therefore, the most widely used energy-saving roof measures in current energy-saving buildings include planting roof, overhead ventilation roof, waterscape roof, etc. In the design process of exhibition building, energy-saving design measures of roof structure need to be solved to reduce the heat transfer between roof structure and surrounding environment, reduce the building energy consumption. The use function and building characteristics of exhibition building lead to large roof area, so the energy-saving design of roof is very important.<br>1. Planting roof. Planting roof is a modern heat preservation and insulation technology that combines green plants with building roof in the design and embeds them in the roof structure. Green roof can increase the greening rate of the site, improve the micro environment of local space and reduce the intensity of heat island. The use of green planting roof can prevent the aging of the roof structure of the exhibition building in the process of daily use, protect the waterproof layer, and effectively control the infiltration of rainwater. The application of planting roof in exhibition buildings can reduce the energy consumption of air conditioning and heating, but in the design of planting roof, the standard value of roof load should be calculated to meet the structural requirements.<br>2. Overhead roof. This is the roof effect used by Sanya International Convention and Exhibition Center. The design of the overhead roof is to set an overhead layer on the roof, to avoid direct sunlight on the roof, so as to generate wind pressure ventilation between the roof and the overhead layer. In summer, it can enhance the heat dissipation of the roof, prevent the heat transfer between the roof and the indoor, and adapt to the hot summer and cold winter and hot summer and warm winter areas.<br>3. Water storage roof. Water storage roof is a water pool set on the waterproof layer of the roof, which can absorb a lot of heat from the roof by using the specific heat capacity of water and reduce the temperature of the roof when the water evaporates. However, the water storage house can not be used in areas with low temperature in winter due to the climate requirements, and the waterproof level of the roof is required to reach level III. It is also necessary to consider the load of the roof structure, as well as various other factors. The application of water storage roof in the exhibition building is very few [[]]. The roof structure of exhibition buildings should be made of materials with solar radiation reflection coefficient greater than 0.4, and light colored materials and coatings should be used. The results show that the reflectance of dark roofs is 35% lower than that of light colored non-metallic roofs when the solar radiation is the strongest at noon. The roofs with high reflectance can reduce the energy consumption of indoor air conditioning system<br>