The National Aquatics Center's "Water Cube" has been turned into an "Ice Cube" and became the first venue in the world to complete the "water-ice conversion". The "Ice Ribbon" ice-making technology of the National Speed Skating Stadium produces nearly zero carbon emissions, making it a model for the combination of green Olympics and high-tech Olympics.
From the "Water Cube" in 2008 to the "Ice Cube" in 2022, the National Aquatics Center has fully demonstrated the concept of sustainable development of the Beijing Winter Olympics while realizing the free conversion from water to ice.
The "Ice Cube" is the largest curling venue in the history of the Winter Olympics and the only venue in the world that has a curling track on the swimming pool.
As a competition venue for water sports such as swimming and diving, the "Water Cube" requires a high temperature and high humidity competition environment, while the "Ice Cube" requires a low temperature and low humidity environment for the curling competition.
Shi Yuqiao, Electrical and Mechanical Engineer, National Aquatics Center
The competition area on the basement floor
is used as a precisely controlled area
to achieve the indicators
of low temperature and low dew point
The audience area is controlled
at about 18 degrees
according to the daily office temperature
which saves a lot of energy consumption
and equipment investment
The 22 "ice ribbons" of the National Speed Skating Hall are oval curved glass curtain walls made of 3360 pieces of glass.
An aerial work company in Nanjing used the world's tallest 58-meter aerial work vehicle to participate in the construction of the entire speed skating hall.
By creatively adopting carbon dioxide trans-critical ice-making technology for the first time in the world to ensure almost zero carbon emission, the ice surface area of the National Speed Skating Hall "Ice Ribbon" is 12 thousand square meters, which is currently the largest of its kind in Asia.
In order to solve the problem of heating and cooling circulation in venues, Jiangsu Wuxi-based COFCO Engineering Co., Ltd. completed the first application of ammonia heat pump technology for combined cooling and heating in China.
The refrigeration system is equipped with a waste heat recovery device, and the recovered heat is used for ice melting, showering, catering, and de-humidification in the ice rink to regenerate heat to ensure combined cooling and heating.
