Why do we have to take external shading measures for the west-facing external windows?

sun exposure in the west is a hazard to buildings due to their geographical location. Mainly furniture, wood accelerated aging, air conditioning and other household appliances increased power consumption.

as we all know, the choice of building orientation should meet the requirement of having more sunshine in winter and avoiding too much radiation in summer. According to the geographical location of our country, buildings facing south and its adjacent orientation can meet this condition. However, due to the limitation of terrain or considering the overall planning and layout of the community, many houses are often located in the east-west direction, which makes some rooms in the building have the problem of western sun exposure.

In residential use, we find that there are many hazards in the western sun exposure:

1. The indoor temperature of the western sun exposure room is 2-3℃ higher than that of other rooms in summer, and the furniture, carpets, floors and curtains in the western sun exposure room will fade and age faster, and their service life will be greatly reduced.

2. Every house exposed to the sun in the west is not ventilated in summer, and the wind does not enter the house. In winter, the northwest wind blows, and even if the windows are closed, the wind will get into the house.

3. The intense sun exposure in summer will increase the temperature of the room facing west a lot, and the huge heat released by the sun through the glass of the sun exposure room will lead to the huge energy consumption of air conditioning operation and increase the electricity cost.

4. In a house with sunshine in the summer afternoon, the walls will absorb heat, and the heat will be emitted at night, which will evaporate a lot of oxygen in the house, leading to a low level of people's mental state.

5. At present, the conventional way to solve the problem of "western drying" is to use curtains with blinds. This method can prevent the entry of sunlight heat to a considerable extent, but the disadvantages are also obvious. There is no natural light in the room at all, and people feel depressed in the room.

6. The first condition of geomantic omen is to hide wind and gather gas, which is a broad name, and oxygen is one of them. In summer, the sun will evaporate oxygen in the house exposed to the west, and in autumn and winter, the northwest wind will rapidly disperse the gas field around the house, so from the perspective of geomantic omen alone, the house exposed to the west is unlucky.

Therefore, in the general layout of buildings, buildings with high temperature, hot processing, special requirements and more people should avoid western sun exposure. (For example, in museums and exhibition halls, the showroom, storage room and restoration studio should be arranged in the north-south direction to avoid western exposure; In residential buildings: the bedroom and living room should avoid western sun exposure; In educational buildings: the classroom should avoid western exposure. )