the history, current situation and future of refrigerant

25-Aug-2024 19Comments

What is the history, current situation and future of refrigerant development?

Refrigerant, also known as refrigerant, refrigerant, and refrigerant, is a medium substance used to complete energy conversion in various heat engines. It needs to have excellent thermodynamic properties, thermophysical properties, chemical stability, economy, and environmental protection.

From 1830 to the present, refrigerants have gone through five stages of development. During this period, the mainstream refrigerants include fluorine-free refrigerants, CFCs-first-generation refrigerants, HCFCs-second-generation refrigerants, HFCs-third-generation refrigerants, and HFOs-fourth-generation refrigerants.

The development of refrigerants can be roughly divided into the following five stages:
The first stage 1830-1930: Due to social development, people boldly explored refrigerants in the process of artificial refrigeration. The principle of use was to use as long as it could be used, and fluorine-free refrigerants were used. They often had accidents due to their strong instability;
The second stage 1930-1990: People's demand for artificial refrigeration increased sharply, and they urgently needed safe and durable refrigerants. At this time, the first generation of chlorofluorocarbons (CFCs) refrigerants based on halogenated hydrocarbons appeared, such as R-12;
The third stage 1990-2000: The first generation of refrigerants consumed a large amount of ozone in the stratosphere, and the second generation of hydrofluorocarbons (HCFCs) with smaller ODP were used as transitional substances in a short period of time, such as R-22;
The fourth stage 2000-2010: The third generation of hydrofluorocarbons HFCs refrigerants such as R134a, these substances have no destructive effect on the ozone layer (ODP), but they have a higher greenhouse effect (GWP);
The fifth stage from 2010 to now: Due to the high greenhouse effect of the third-generation refrigerants, countries are actively developing the fourth-generation fluorine refrigerants HFOs with zero ODP and extremely low GWP, such as R1234yf.

Cling research on the application of new refrigerants:

With the implementation of relevant domestic and foreign regulations, the selection of the next generation of refrigerants has gradually become the focus of attention. Although all EU passenger cars use R1234yf refrigerant, due to its patent restrictions, the price is relatively high, and the cooling capacity requirements of bus air conditioners are much higher than those of passenger car air conditioners. Most new energy pure electric vehicles are heat pump air conditioners, and it is impossible to use secondary heat exchange to isolate and protect the passenger compartment. The use of tube cores and parallel flow cores is far from enough. According to the above comprehensive evaluation, Colin currently adopts a two-way research and application solution for CO2 and R1234yf series refrigerants. CO2 refrigerant models have been produced in small batches. Among the R1234yf series refrigerants, Colin currently uses R454C refrigerant to replace R407C refrigerant and R1234yf to replace R134a refrigerant. Among them, R454C has completed testing and verification, and R1234yf is being verified.

As a professional bus air conditioner manufacturer in China, Cling offers a wide range of air conditioning products for 6-25m bus, citybus, coach, school bus, shuttle bus, special vehicles etc at best cost-performance.

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