With the goal of carbon peaking and carbon neutralization, carbon emissions are gradually affecting various industries, especially large energy consumers.As an important material supporting facility, the energy consumption of cold storage has always been an important factor in its development. However, under the goal of double carbon, carbon emissions will affect its later development direction.
Carbon emission is a comprehensive concept, which involves the construction of cold storage, material consumption, energy consumption, material recycling and other carbon footprints.Among them, energy consumption and refrigerant supplement account for a large proportion. The development direction of cold storage is mainly around energy consumption and refrigerant.At present, domestic cold storage systems mainly include ammonia refrigeration system, freon refrigeration system and carbon dioxide refrigeration system.Each system is the product of the development of policy and technology, and its advantages and disadvantages are obvious.
The energy consumption of ammonia refrigeration system is the lowest, the GWP of ammonia refrigerant is 0, and its comprehensive carbon emission is the lowest.From the perspective of carbon emission, ammonia refrigeration system will always be used in the future.However, due to the toxic, flammable and explosive properties of its products, some places and environments have been restricted.
Freon refrigeration system has a high energy consumption and a high global warming index. In the pipe library of some barrel pump systems, the leakage supplement of refrigerant is large. Its carbon emission is higher than that of energy consumption, and the comprehensive carbon emission is particularly high.It will be gradually reduced in the future cold storage application. Because of its good safety performance, there are still many cold storages used at present.
The energy consumption of carbon dioxide system is equivalent to that of freon, but its GWP is 1. The carbon emission from leakage and supplement during operation is also small, and the comprehensive carbon emission is moderate. It is a product of replacing Freon storage.However, its physical properties are quite different from those of ammonia and Freon systems. In the application of cold storage, the maintenance requirements are high, and the low-temperature defrosting is constrained. We still need to continue to explore in the development of cold storage.
The coolant refrigeration system is an indirect refrigeration system. Its main function is to cooperate with the refrigerant system to reduce the system charge.It is combined with ammonia refrigeration system to reduce the level of hazard sources, and with freon to reduce carbon emissions. Its energy consumption is slightly higher than that of Freon system, and its comprehensive carbon emission is low. It is an essential supplement in the future application of cold storage.
The exploration of refrigerants has been ongoing. The characteristics of safety, low carbon, energy saving and low investment will also be the ultimate direction of the refrigeration system of cold storage.
Glacial Coolant on the coolant refrigerant system and its application.