Beijing's climate environment is not suitable for large-scale snowfall and remains unchanged for a long time. Without the necessary venues, many projects of the Winter Olympics can't be carried out naturally. Some indoor skating events can also use artificial ice to build venues, but outdoor ski resorts need artificial snowfall to build qualified competition venues.
Before hosting this Winter Olympics, it took the domestic team five years to break through the core technology of snow making machine. Why is Fu Na so difficult? Generally, the host city of the Olympic Games has no strict requirements. As long as the necessary venues can be provided and the application is successful, the Olympic Games can be held.
However, the venues needed for the Summer Olympic Games are easier to achieve, while many events of the Winter Olympic Games have to be carried out on snow-covered tracks. If the snow is too thin or insufficient, it will naturally fail to meet the requirements of the competition. Before the invention of the snow machine, the host city of the Winter Olympics in previous years would store a lot of snow in the cold storage.
However, it takes a lot of electricity to keep the stored snow intact, and it takes a lot of snow to lay a snow trail more than ten kilometers long, so the stored snow is difficult to meet the needs. Russia once hosted the Winter Olympics, and it snowed a lot a few years ago.
But when I built the station, I found that there was not enough snow. Later, 450 snow machines were adjusted to solve the problem of insufficient snow supply, for which Russia spent 40 million yuan. China can also choose to rent a snowmobile to host the Winter Olympics, but for the long-term development of winter tourism and skiing, the snowmobile technology was conquered several years ago.
Snowmaker is similar to artificial rainfall, but it blows out small pieces of crystal ice. In the past, water below 5℃ was mixed with air to form ice cubes at MINUS 25℃, and the ice cubes were chopped up with a cutting machine and sprayed out together with the air. This kind of artificial snow is very different from snowflakes formed in nature. This is not a thin snowflake, but a piece of ice 5 mm in size. ..
That kind of snow machine was widely used decades ago, but later people put forward higher requirements for snow machines out of the need of fair competition. Ski trails paved with flake ice are different in nature from ski trails, and larger particles are easy for athletes to slip.
China's research team has also gone through hardships and developed a snowmobile that can spray snowflakes that meet the requirements. In order to develop a snowmobile, researchers work in the field at MINUS 20 degrees and test snowmobiles in various environmental conditions every day.
Finally, in 20021year, the research team developed a variety of snow machines suitable for different environmental conditions, which provided a strong guarantee for the hosting of the Winter Olympics. The snow machine developed in China has been put into practical use, and the alpine ski center has used 170 snow machine for maintenance.
Domestic snow machines are different from previous snow machines. Instead of chopping and spraying ice, it sprays water droplets in mist, which are quickly refrigerated to form snowflakes closer to natural conditions. The size of the ejected snowflake varies from10mm to 0.3mm..
Unlike the snow formed by natural snowfall, the snow track of the Olympic Games requires the snow density to reach 5~ 13 times that of natural snow. Athletes have skied on the snow trail many times, but the snow trail can still be kept smooth enough.
It is understood that the snow-making work of the Beijing Winter Olympics took six weeks before all the tracks were built, and the area of Fu Na reached125,000 square meters. Artificial snow is also doped with some substances to prevent it from melting too fast. Even if the snow track of the Winter Olympics heats up to more than ten degrees, the snow can continue to exist stably for a period of time. # Winter Olympics # # Snowmaker #