The Zhejiang Provincial Public Building Energy Conservation Code is to implement national regulations and policies on energy conservation and environmental protection, improve the indoor thermal environment of public buildings, and increase the energy efficiency of HVAC systems. It is formulated to utilize efficiency and reduce building energy consumption. It is suitable for energy-saving design of new, renovated and expanded public buildings. Among them, what are the regulations for building energy-saving design in the Zhejiang Provincial Public Security Bureau Building Energy-saving Code? The following is an introduction to the energy-saving design of public buildings in Zhejiang Province brought by the Architecture Network for reference.
The planning layout of the building's general plane and the individual plane design should be conducive to reducing solar heat radiation in summer; obtaining more sunshine in winter and avoiding the dominant wind direction in winter; and providing natural ventilation in spring and autumn. In the overall planning and design, natural resources such as sunlight, water, wind, and greening should also be fully utilized to carry out multi-faceted energy-saving design.
The main orientation of the building should be from 30° east by south to 15° west by south or the best local orientation. The main rooms should avoid the dominant wind direction in winter and the west direction with maximum sunlight in summer.
The shape of the building should avoid excessive unevenness and staggering, and the shape coefficient should not be greater than 0.40.
According to the proportion of building envelope energy consumption to the total annual building energy consumption, the following three types of public buildings are divided.
1. Public buildings with a single building area greater than 20,000 square meters (including 20,000 square meters) or fully equipped with air-conditioning systems are Category A buildings.
2. Public buildings with a single building area of ??less than 20,000 square meters and without air conditioning systems are classified as Category B buildings.
3. Public buildings that are deactivated or do not have air conditioning systems when the cooling and heating loads are at their peak in summer and winter are classified as Category C buildings.
Exterior windows (including transparent curtain walls) of public buildings should comply with the following regulations:
1. East-, west-, and north-facing windows (including transparent curtain walls) of Category A buildings ) The wall-to-wall ratio should not be greater than 0.7, the south direction should not be greater than 0.8, and the total window-to-wall ratio of the building should not be greater than 0.70.
2. The wall ratio of windows (including transparent curtain walls) in each direction of Category B buildings should not be greater than 0.80.
3. The wall ratio of windows (including transparent curtain walls) in each direction of Category C buildings should not be greater than 0.50.
4. When the window-to-wall ratio in a single orientation is less than 0.40, the visible light transmittance of glass (or other transparent materials) should not be less than 0.40.
5. The air tightness of exterior windows shall not be lower than the level 4 requirements stipulated in the "Grading and Testing Methods for Air Tightness of Building Exterior Window" GB7107.
6. The air tightness of the transparent curtain wall should not be lower than Level III specified in the "Physical Performance Classification of Building Curtain Walls" GB/T15225.
7. The openable area of ??external windows should not be less than 30% of the window area. The transparent curtain wall should be equipped with an openable part in each independent bay, and the openable part area should not be less than 2% of the ground area.
The area ratio of the transparent part of the roof should not be greater than 20% of the total roof area. When the provisions of this article cannot be met, a weighing and judgment must be made according to the provisions of Section 4.3 of this standard.
Exterior windows (including transparent curtain walls) of buildings should be equipped with external sunshades, and transparent parts of building roofs should be equipped with sunshade measures. The shading coefficient of external sunshades is determined according to Appendix A of this standard.
The temperature of the thermal bridge between the building's exterior wall and roof, as well as the basement exterior wall and the interior surface of the ground, should not be lower than the dew point temperature of the indoor air. When the room in the basement of the building is used and has air conditioning, the exterior walls and floors of the basement should be insulated and the thermal resistance should be R≧1.2㎡.K/W. When there is no air conditioning, the exterior walls and floors of the basement should be The ground does not need to be insulated, but the roof panel must be insulated, and its K value should meet the heat transfer coefficient of the base plate in contact with outdoor air.
Door buckets should be installed on the exterior doors of the building, or heat insulation and energy-saving measures should be taken.
The color of building exterior walls should be light.
Vegetated roofs and elevated roofs should be used for flat roofs.
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