"Ice Ribbon" gave birth to the Olympic record What "black technology" is contained in the "fastest ice"

On February 7, the beijing Winter Olympics speed skating women's 1500 meters final was held at the National Speed Skating Hall known as the "Ice Ribbon", and the Dutch West set a new Olympic record with a time of 1 minute 53.28 seconds and won the championship.

This is also the third Olympic record born in the "Ice Ribbon" at the Beijing Winter Olympics, and the "fastest ice" is worthy of the name.

A number of technologies and measures to create the "fastest ice"

"Speed skating venues must provide the best conditions for athletes to perform, and we make 'fastest ice' the most important goal." Li Jiulin, head of the National Speed Skating Hall Smart Venue Construction and Application Key Technology Research and Demonstration Application Project, said.

There are many factors that affect the "fastest ice", one of the most important factors is the quality and temperature difference of the ice surface. Li Jiulin said that the team focused on the "fastest ice" and green and low-carbon goals, and with the support of key research and development plans, innovated the carbon dioxide transcritical direct cooling ice system, which not only reduced the energy-saving and environmental protection GWP value (global warming potential) from nearly 4,000 to 1 at the beginning, but also controlled the ice temperature.

In addition, the team compared with the BIM model through laser scanning to test and ensure that the 120,000 meters of stainless steel ice pipes under the ice rink were in a precise position to ensure that the ice temperature was uniform. In order to ensure the flatness of the ice plate concrete, the laser measurement technology is used to make the flatness deviation of the 12,000-square-meter ice rink from the original acceptance standard of 5 mm to a maximum of no more than 3 mm.

Li Jiulin said that the team controls a series of factors such as wind speed and humidity, including fine regulation of the indoor environment of the digital twin venue, all of which contribute to the athletes to create the best results and create the "fastest ice".

Two hours to achieve the "most beautiful ice" to "fastest ice" conversion

On February 5, China's Wu Dajing (front left) rushed to the finish line. Photo by Xinhua News Agency reporter Wang Yuguo

On February 5, in the short track mixed team relay final, the Chinese team composed of Fan Kexin, Qu Chunyu, Wu Dajing, Ren Ziwei and Zhang Yuting crossed the finish line first with a time of 2:37.348 and won the championship. The first gold medal of the Beijing Winter Olympics of the Chinese Legion was born, and the first mixed team relay gold medal in the history of the Winter Olympic Games was born.

Just before the short track mixed team relay, the Capital Gymnasium completed an "ice conversion" within two hours, from figure skating ice surface to short track speed skating ice surface, successfully realizing the "most beautiful ice" to "fastest ice" conversion.

It is understood that figure skating and short track speed skating have different requirements for the ice surface, figure skating requires the ice surface to be thicker, short track speed skating requires the ice surface to be thinner, figure skating requires the ice surface to be softer, and short track speed skating requires the ice surface to be harder.

It is not easy to achieve the "ice and ice conversion" conversion in two hours, but on February 13, due to the training and competition needs of athletes, the time left for the "ice conversion" was only one and a half hours. Liu Bo, comprehensive head of the permanent facility support group of the first body of the Winter Olympics of the Eighth Bureau of China Construction, said that to complete the conversion of the ice-making system within one and a half hours, it is necessary to adjust the value of the ice-making unit, monitor the real-time temperature transmitted back from the ice surface, and ensure the normal operation of the ice-making system, ice-melting system, automatic control system, pure water preparation system, etc. (Yang Yuboluo synthesized from People's Daily, Xinhua Net, Beijing Youth Daily, Science and Technology Daily)