An overview of lower GWP blends for the food cold chain.
收藏DataCite Commons2020-09-20 更新2025-04-16 收录
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资源简介：
In the food cold chain, R-404A and R-22 are very widely used. But the ban of R-22 is now completed or ongoing according to the regions. Due to its very high GWP, R-404A will also be subject to bans or restrictions in the future. To replace R-22 and R-404A, over twenty synthetic refrigerants, mostly blends, are proposed by various producers and referenced with ASHRAE classification. This multiplicity of products is confusing. Some are proposed as alternatives to R-22, or to R-404A, or both. Some are flammable; others are not. GWP’s can vary in a wide range. This paper provides the basic concepts to understand why and when blends are needed, and the link between their formulation and their key physical and environmental properties: operating pressures, temperature glide, volumetric capacity, GWP, and flammability. The most commonly proposed alternatives are analyzed to provide some understanding of the trade-offs between GWP, flammability, and key physical parameters.
提供机构：
International Institute of Refrigeration (IIR)
创建时间：
2018-09-07
