The National Speed ??Skating Hall uses carbon dioxide transcritical direct refrigeration.
The National Speed ??Skating Stadium is the first Winter Olympics speed skating venue in the world to use carbon dioxide transcritical direct cooling ice making technology. This technology is currently the most advanced and environmentally friendly ice-making technology in the world. The carbon emission value is close to zero and the energy efficiency of ice-making is greatly improved.
Since the ice surface area of ??the National Speed ??Skating Hall reaches 12,000 square meters, this ice has become the world’s largest multi-functional full ice surface using carbon dioxide transcritical direct cooling ice making technology. After the game, the ice surface can be refrigerated in different zones, and the temperature of each piece of ice can be controlled individually to achieve "simultaneous operation and different use" of the venue. Two key design solutions, the integrated design of the venue's ice-making system and the ice plate structural design, have been patented.
Refrigeration generally refers to freezing (Chinese word):
Freezing refers to lowering the temperature to solidify or freeze objects. Also called "refrigeration", it is a method of artificially creating low temperatures by applying the principles of thermodynamics. Refrigerators and air conditioners both use the principle of refrigeration. From the perspective of chemical industry, a gas with a high critical point is generally used, liquefied under pressure, and then vaporized to absorb heat. This process is repeated. When liquefied, it releases heat in other places, and when vaporized, it absorbs heat in the required range. .