carbon dioxide transcritical direct refrigeration is used to make ice.
The National Speed Skating Hall ("Ice Ribbon"), located at No.2 Lincui Road, Chaoyang District, Beijing, near the Olympic Park, is the landmark venue of the Beijing main competition area of the 222 Beijing Winter Olympics and the only newly-built ice competition venue.
The design concept of "Ice Ribbon" comes from an idea of combining ice and speed. The 22 ribbons are like the traces of athletes' sliding, symbolizing speed and passion.
Environmental protection technology:
The National Speed Skating Gymnasium is the world's first Winter Olympic Speed Skating Gymnasium that uses carbon dioxide transcritical direct cooling ice-making technology. This technology is the most advanced and environmentally friendly ice-making technology in the world at present, with carbon emission value approaching zero and ice-making energy efficiency greatly improved.
As the ice surface area of the National Speed Skating Hall has reached 12, square meters, this ice has become the world's largest multi-functional all-ice surface made by carbon dioxide transcritical direct cooling ice-making technology.
after the games, the ice surface can be refrigerated in different zones, and the temperature of each ice can be controlled separately, so as to realize the "simultaneous operation and different use" of the venues. Two key design schemes, the integrated design of ice-making system and the structural design of ice plate, have been patented.