New ice technology helps Create ‘fastest ice ever’

2022-04-29 0 By

On the afternoon of February 5th, the “first gold medal” of the National Speed Skating Hall was born.Irene Schoten of the Netherlands won the women’s 3000m speed skating final.Behind this perfect ice field lies a new hard-core technology — natural working medium carbon dioxide technology.Zhang Xinrong, a professor from the School of Engineering of Peking University, led a team that successfully challenged the limit of temperature difference on the ice surface and snow making temperature, turned greenhouse gases into efficient resources, maximized environmental protection and energy saving in the stadium, and helped create “the fastest piece of ice in the history of the Winter Olympics”.Photo of Zhang Xinrong’s team working at the National Speed Skating Hall.Back on September 9, 2016, officials from various departments of the Chinese Organizing Committee for the Olympic Games (BOCOG) gathered in the Office area of the Beijing Organizing Committee for the Olympic Games, where a meeting on the ice rink for the Beijing Winter Olympics was in full throttle.At the meeting, Zhang xinrong made his point clear: “Our rink can no longer use freon to make ice.”Zhang Xinrong instructs the operation of trans-critical CO2 ice machine at the National Speed Skating Stadium.According to Peking University, the traditional refrigerant freon is bad for the environment and is not safe. Therefore, he advocates the use of more environmentally friendly carbon dioxide ice-making technology for the Beijing Winter Olympics.This novel proposal won support, and the demonstration of ice production from natural working medium carbon dioxide was formally launched.For several years, colleagues of the Organizing committee of the Olympic Games traveled across China and the other side of the ocean, repeatedly compared and studied, and finally approved the plan.With the help of natural working medium carbon dioxide ice making technology, China is the first to replace freon ice making in the history of human Winter Olympics.The 12,000 square meters of ice at the National Speed Skating Stadium, known as the “ice Ribbon,” is a masterpiece of carbon dioxide ice technology.If the traditional ice making technology is used, the temperature difference between different areas of the ice is very large, which will lead to uneven hardness of the ice and affect the performance of competitors.The carbon dioxide ice technology can control the temperature difference of the “ice ribbon” within 0.5 degrees Celsius, and the hardness is uniform, so that athletes can gallop on it.At an international test event that ended in October, five of the six athletes set personal bests on the ice, adding to the anticipation of the ongoing Winter Games.They “created the fastest piece of ice in the history of the Winter Olympics,” Zhang laughed.In March, when the Beijing Winter Paralympic Games will be held, the average temperature in Beijing can reach eight degrees Celsius. At present, the common working temperature of snow making machines at home and abroad is below zero, and the limit temperature of snow making can not exceed two degrees.This is a problem for the Beijing Winter Paralympic Games.Zhang Xinrong proposed carbon dioxide technology as a solution.There is already a small amount of artificial snow in use internationally, but it is often made and then crushed, as was the case in Sochi and Pyeongchang.This kind of “snow” hardness is very big, can let the alpine skier’s knee bear big pressure, affect the result.Zhang xinrong advocates the use of carbon dioxide technology in the field of artificial snow, directly to create the closest artificial snow to natural snow: “We are the first in the world to propose this bold idea, using a design that is not available in the world.”With the support of relevant organizations, Professor Zhang’s team demonstrated in the Yanqing Xiaohaituo Mountain Winter Olympics venue and achieved complete success.Carbon dioxide zero artificial snow technology, as one of the Beijing Winter Paralympics program, so that jumping on the snow in the spring breeze and warm sun is no longer a dream.”In the future, carbon dioxide efficient heating and cooling technology will also fly into ordinary homes and shine in more areas of production and life, bringing us endless surprises.”Zhang xinrong said.