On the day of spring, the Beijing Winter Olympic Games officially opened.
With the concept of "Green Olympics", the Beijing Winter Olympics has newly built and rebuilt 7 ice venues, with a total of 9 ice surfaces. Among them, five ice surfaces use carbon dioxide (R744) transcritical direct refrigeration system, which is the first time in previous winter Olympics; The fourth generation refrigerant r449a is used for the four ice surfaces.
The national speed skating hall, known as the "ice ribbon", is the only newly-built ice competition venue for the Beijing Winter Olympic Games. It is not only unforgettable in shape, but also "both inside and outside", with 12000 square meters of "the fastest ice"
The national speed skating hall called "ice ribbon". Source: Xinhua News Agency
Why is it called "the fastest ice"? How is r449a refrigerant different from traditional refrigerant? Which listed companies are involved?
How to pave the "fastest ice"?
It is understood that the traditional ice rink usually adopts indirect refrigeration, such as Freon refrigerant and ethylene glycol refrigerant. Because the refrigerant often does not release heat at a fixed temperature, the ice temperature difference in the ice rink is generally as high as 1.5 ℃ - 2 ℃.
The national speed skating hall adopts the carbon dioxide direct cooling ice making system, which not only has higher heat exchange efficiency, but also has uniform ice temperature, and the temperature difference is basically within 0.5 ℃. This technology can ensure that no matter how many laps the athletes skate to, the quality of ice is the same, which helps to create "the fastest ice" for top events.
Another highlight of carbon dioxide refrigerant is low-carbon and environmental protection.
Its ODS (ozone layer destruction potential) is 0 and GWP (global warming potential) is only 1. GWP using the same amount of traditional refrigerant is nearly 4000 times that of carbon dioxide refrigeration. At the same time, after the waste heat generated by refrigeration is recovered, it can provide 70 ℃ hot water for domestic hot water and dehumidification regeneration. Compared with the traditional refrigeration method, the national speed skating hall adopts carbon dioxide ice making, which can improve the energy efficiency by 30% and save about 2 million kwh of electricity a year.
Which A-share listed company participated in "ice ribbon" ice making?
A few days ago, Cofco Engineering & Technology Co.Ltd(301058) said when receiving the research of institutional investors: "The national speed skating hall project undertaken by our company mainly includes the design of refrigeration system and ice making process. The project will mainly undertake the competition and training of Olympic opening and Olympic speed skating. It is a speed skating Avenue hall with carbon dioxide transcritical ice making system. It is green, environmental protection and integrated heat supply design, which ensures the efficient utilization of energy, which is more practical than traditional ice rinks More than 30% energy efficiency improvement has been achieved. "
The company also undertook the track refrigeration and other projects of the national snowmobile and sled center.
It is reported that the natural refrigerant refrigeration system technology developed and promoted by the company, such as large-scale ammonia refrigeration system technology, subcritical carbon dioxide refrigeration technology and large-scale transcritical carbon dioxide refrigeration technology, can effectively reduce ODS emissions in the field of engineering refrigeration, improve energy efficiency and reduce the emission of advanced GWP refrigerant. The company's cold chain logistics technology can meet the technical requirements of preservation and refrigeration stored in agriculture, seeds, fruits and vegetables, food enterprises, biomedicine and other industries.
However, some insiders said that although carbon dioxide refrigeration has many benefits of low-carbon and environmental protection, and this technology has a history of more than 20 years, it is still in industrial use mainly due to factors such as technical difficulty, and large-scale promotion will take some time.
unconventional of traditional refrigeration
In addition to the carbon dioxide transcritical direct refrigeration system, the Beijing Winter Olympic Games also adopts the traditional refrigeration system for venues that do not need perennial ice making, such as ice cube.
Although refrigeration is adopted, unlike the previous winter Olympics, this winter Olympics adopts the fourth generation refrigerant r449a, which is more low-carbon and environment-friendly.
According to insiders, the GWP of r449a refrigerant is about one-third of that of R404A refrigerant compared with R404A ice making agent, which is the most used in ice making at the 2018 Pingchang Winter Olympic Games.
Recently, Bingshan Refrigeration & Heat Transfer Technologies Co.Ltd(000530) said on the investor interaction platform that Panasonic refrigerator, an associate of the company, has undertaken two competition events of the Winter Olympic Games (ice cube - Olympic curling field; Wukesong Stadium - Olympic men's ice hockey finals) and two supporting projects (chengdesaihanba National Ice Training Center; Olympic project - Water Cube south square ice sports center).
The company also said that the ice and snow business is one of the company's multiple advantageous market segments. The subsidiary iceberg project has undertaken landmark ice and snow projects such as Guangzhou rongchuangmao indoor ski resort project, Shenzhen jiazhaoye Jinshawan International Park Ice and snow park, Shanghai Star indoor comprehensive ice and snow venue and so on. The company will actively expand the cause of ice and snow and grasp the business opportunities brought by the development of ice and snow sports in China.
In addition, the company also revealed that in recent years, Panasonic refrigerator has repeatedly applied carbon dioxide transcritical technology in its commercial projects.
In terms of refrigerant production, Zhejiang Juhua Co.Ltd(600160) , Zhejiang Sanmei Chemical Industry Co.Ltd(603379) , Zhejiang Yonghe Refrigerant Co.Ltd(605020) and other A-Shares are listed as the leaders of refrigerant production in China. Previously, Zhejiang Juhua Co.Ltd(600160) said on the investor interaction platform that the company has a variety of fluorine refrigerants from the first to the fourth generation.
