Industrial freezing is currently the main application areas: petrochemicals, large-scale food processing, beer production, and biopharmaceuticals.

 

The pre-industrial refrigeration industry mainly uses open-type screw compressors and uses ammonia refrigerants. Industry online preliminary statistics show that the sales volume of open-type screw compressors in 2017 will be 5,300 units, and the average annual compound growth rate in 2013-2017 will be -3.5%, of which ammonia compressors will decline by 5.5% annually. Equipment manufacturers are highly concentrated, among which domestic market shares such as icebergs, ice wheels, and snowmen account for more than 70%; foreign companies such as York and GEA also have a certain market.

 

In the market, as the main application field of industrial refrigeration in the chemical industry, the rapid development reached its peak during the “Eleventh Five-Year Plan”; under the circumstances of the gradual saturation of the market, due to several “Ammonia” leak explosion accidents during the “Twelfth Five-Year Plan” period. The huge impact, coupled with the financial tightening brought about by the new normal economy, has reduced the number of projects started, and the use of ammonia refrigerants in industrial refrigeration has begun to decline.

 

In fact, ammonia, as a natural working fluid, has a high cooling efficiency. Compared with fluorine refrigeration, its advantages in both environmental protection and energy efficiency are extremely obvious. Several ammonia leakage accident investigations have found that poor or cold operation of ammonia storage equipment is the main cause of accidents and should not have caused accidents. Of course, the safety aspect of the ammonia refrigeration system must be given sufficient attention. In the ammonia refrigeration system, the reduction of the ammonia charge is achieved. Strict control of the design, material selection, and construction processes, as well as the effective supervision of the overall operation of the system, can ensure the ammonia cooling. The system operates safely and reliably.

 

In the past two years, various companies have been accelerating the promotion of refrigerants of natural refrigerants. Ammonia and carbon dioxide have become the mainstream choices in the future. The situation of “talking about ammonia discoloration” has eased, but due to various considerations such as safety, related units have There are many restrictions on the use of refrigerants. At present, ammonia-based refrigeration projects are generally located in suburban areas with relatively few residents. The overall refrigeration industry, “Ammonia Fluorine Reuse,” continues, and the presence of ammonia in large-scale industrial refrigeration projects continues to decrease. We expect the future. This situation will not change much in a short time.