Four new refrigerants waiting for US ASHRAE approval-news

On 10.14, the latest information issued by Sina Real Estate stated that four new refrigerants were proposed in the American ANSI/ASHRAE 34-2013 standard. They are mixed refrigerants R459A, R459B, R460A and R460B. ANSI/ASHRAE 34-2013 'Refrigerant Nomenclature and Safety Classification Standard' introduces the rapid naming and safety category assignment of refrigerants based on toxicity and flammability data.

The two refrigerants R459A and R459B contain different components of R32 and HFOs refrigerants R1234yf and R1234ze(E). The specific application areas of these two refrigerants have not been mentioned, but similar mixtures have been used as substitutes for r410a refrigerants. Both of these mixtures belong to the A2L category 'slightly flammable' substances. The proportions of R32, R1234yf and R1234ze(E) in the R459A mixture are 68%, 26% and 6%, respectively. R459B refrigerant includes the same substances, but in different proportions, where R32: 21%, R1234yf: 69%, R1234ze(E): 10%.

R460A and R460B belong to the A1 category, non-toxic and non-flammable. Their composition includes R32, R125, R134a and R1234 ze(E). R460B is more similar to the development of LTR4X refrigerant, and may be planned to replace r404a and R22 refrigerant in the future. The composition of R460B includes R32: 28%, R125: 25%, R134a: 20% and R1234ze(E): 27%. The composition of R460A refrigerant is quite different: R32: 12%, R125: 52%, R134a: 14%, R1234ze(E): 22%.

In the face of the global trend of reducing HFCs with higher GWP values, finding a safe alternative refrigerant has become a high-stakes game. At the beginning of 2016, at least 80 alternative refrigerants with high GWP values u200bu200bhave been put into use or are being tested. At the same time, more new products are being developed. Surprisingly, ASHRAE's records show that since 1993, there have been more than 200 applications for different types of refrigerant applications. Although not all products are successful or ultimately applied, and some of them have been discontinued, the overall number is still growing.

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