What are the applications of ice makers in the Winter Olympics

With the Beijing Winter Olympics in full swing, congratulations to the Chinese team for their best performance ever, winning six gold MEDALS and fifth in the gold medal table. The ice on the Winter Olympic venues and the snow on the outdoor field are not natural, and the ice system is responsible for the protection of the Winter Olympics.

The beautiful and low-carbon Olympic venues are also attracting increasing attention. In order to give the athletes a good experience on the ice surface and help them give full play to their best competitive level, the university and enterprise scientific research team, under the special support of the national key research and development program "Science and Technology Winter Olympics", has developed the internationally advanced carbon dioxide cross-critical direct cooling ice making technology, and built the "most beautiful and fastest ice surface" for the athletes from all countries.

For example, the Water Cube has been transformed into an ice Cube, a curling venue, a short track speed skating venue, and a free skating venue, all of which cannot be separated from the ice system to produce a high standard ice surface for the venue.

For example, the outdoor ski track in Zhangjiakou needs snow makers to make snow for the track.

Ice making machine is the key core of artificial ice rink construction. From the perspective of ice making machine of ice rink in previous Winter Olympics, it mainly adopts synthetic refrigerant technology such as Freon or ammonia refrigeration technology. The former has serious greenhouse effect problem, while the latter has security risks.

The technology of ice making machine, which uses carbon dioxide as the refrigerant and evaporates directly under the ice surface, is considered as a green, low-carbon and energy-saving solution, but its technology has been in the hands of European and American enterprises. This time, taking the Green Winter Olympics and the Science Winter Olympics as an opportunity, through the cooperation of the industry, the university and the research institute, eight units, including Ou Yue Ice & Snow Investment Management (Beijing) Co., LTD., Tianjin University and Ace Refrigeration and Solar Technology (Beijing) Co., LTD., jointly developed, designed and built the carbon dioxide transcritical direct cooling ice maker group with independent intellectual property rights. In the Capital Stadium ice rink demonstration application, service for the Winter Olympics.

The scheme is designed to save energy from the four processes of compression, cooling, throttling and evaporation of carbon dioxide ice making system. For the compression process, two-stage compression is adopted to achieve "twice the result with half the effort"; In view of the cooling process, the full sensible heat recovery is designed to recover the cooling heat, so as to realize the hot water requirements of different temperatures such as pouring ice and melting snow in the ice rink. For the evaporation process, direct evaporation heat absorption under the ice surface is adopted to provide stable cold supply for the ice rink, and the optimal design of evaporation coil and civil engineering to ensure the uniform temperature of the ice surface.