carbon dioxide is used for refrigeration.
The National Speed Skating Hall will be the first speed skating hall in the world to adopt CO2 transcritical refrigeration, and it is also the largest CO2 transcritical refrigeration system in China. In fact, the National Speed Skating Hall has become the benchmark for similar projects in the future. After the National Speed Skating Hall decided to adopt the carbon dioxide transcritical refrigeration system, most ice rinks in other venues of the Beijing Winter Olympics adopted this system.
Environmental Protection Technology
The National Speed Skating Hall is the first one in the world to adopt the ice-making technology of transcritical direct cooling of carbon dioxide in Winter Olympics. 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.
above content reference: Baidu Encyclopedia-National Speed Skating Hall