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As many as seven members of the Spanish national team are suffering from colds due to the air conditioning, and many are suffering from hoarseness and other symptoms, the Spanish daily As reported. Many frontline reporters also reported that the air conditioning system installed by Qatar to cool the stadium would make people feel "cold bursts" in the afternoon and evening. In fact, this is also related to the desert climate environment, the temperature difference between day and night is larger.
But from the other side, also have to admire the Qataris, in order to resist the heat, give the technology and ruthless life! The air conditioning and cooling system in the famous Qatar stadium is mainly located below the stands. At regular intervals, groups of four large sprinklers, each a few tens of centimeters in diameter, send cool air to players and referees.
The technology combines insulation with "targeted cooling" technology. The goal is not to cool the entire stadium, but the cooling only works in areas where people are actually present, making the stadium a barrier that creates a thin layer of cooling air around spectators. The engineers worked out a precise fluid dynamics model that measured the speed and Angle of air flow to set the Angle of each outlet. The lowest room temperature, can be 20℃ lower than the outside.
Most of the eight World Cup stadiums in Qatar are located along an east-west axis to reduce direct sunlight. This design ensures that the pitch and stands enjoy maximum shade during the day. The Education City Stadium is designed as a shining diamond, with a diamond-shaped lattice facade with high sunlight reflectivity, while the venue is built slightly below ground level to control the temperature. The retractable roof of the Walkola Stadium can be closed within half an hour to provide shade during the day, reducing the temperature of the spectator area to around 18°C.
Qatar also ran wind tunnel simulations of the 3D-printed stadium model using smoke and lasers to observe the flow of air at different wind speeds and pressures. Let the roof arc as much as possible to disperse heat, not into the pavilion.
Of course, Qataris have a tradition of dealing with heat. Firstly, it is reflected in the color of the buildings. The buildings in Qatar are mostly white or earthy yellow. Lighter surfaces reflect more light and avoid absorbing more heat. The same principle applies to traditional Qatari dress.
Qatar's capital, Doha, is one of the hottest cities in the world. The local engineering department has taken the bold step of painting the roads blue in a bid to cool them down. The blue heat reflective paint contains a cooling material that reflects 50 percent of UV rays. After the use of blue paint, the road surface temperature can be reduced by about 7℃, which can effectively reduce the high temperature rutting on the road surface, reduce the wheel tire accident caused by excessive friction heat and urban heat island effect. At the same time, it also brings people a bit of cool from the vision.
In addition, the stadium air conditioning system has been gradually applied to some of the outdoor commercial pedestrian streets in Qatar.
All this also stems from Qatar's "rich money". Although the land area of Qatar is only 11521 square kilometers, which is equivalent to that of Qingdao, it has become one of the richest countries in the world, relying on abundant oil and gas resources. They spent $9 billion to reclaim about 400 hectares of land from the sea. The World Cup cost $220 billion, nearly five times as much as the previous seven World Cups combined.
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