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     Propane R290 refrigerant is a natural and environmentally friendly component that does not damage the ozone layer and has no greenhouse effect. It has a GWP of 3 and an ODP of 0, making it completely environmentally friendly. Propane R290 refrigerant has many advantages such as environmental protection, cost-effectiveness, high efficiency and energy conservation, good refrigeration effect, and wide range of uses, and has many advantages but also disadvantages. It is a highly flammable substance. Propane R290 belongs to Class A3, and special attention should be paid during use.

Performance of R290 refrigeration system

       The theoretical COP values of R290, R600a, and R134a are higher than those of R22 under the conditions of evaporation temperature -25 ℃, condensation temperature 45 ℃, no supercooling, and high superheat; At low superheat, the theoretical COP values of R290, R600a, and R134a are lower than those of R22. The COP values of R290 and R134a are similar. Just like R134a, R404A, and R600a, suction overheating is very important for the performance of the R290 refrigeration system, which can improve the COP of the refrigeration system, while R22 has little impact. For the R290 refrigerator refrigeration system, due to its high specific heat of hot steam, it can have an overheating temperature of 20 ℃ to 32 ℃, which can improve the COP of the 290 refrigerator.

      Harm to human health: It has simple suffocation and anesthesia effects. Short exposure to 1% propane does not cause symptoms; Concentrations below 10% can only cause mild dizziness; When exposed to high concentrations, anesthesia and loss of consciousness may occur; At extremely high concentrations, it can cause suffocation. Flammable gases can form explosive mixtures when mixed with air, and there is a risk of combustion and explosion when exposed to heat sources and open flames.

       Propane R290 refrigerant has flammability, which is also its disadvantage. Components such as compressors, condensers, evaporators, and pipelines in the refrigeration system may cause leakage of the working fluid, while electronic components such as temperature controllers, compressor relays, lighting lamps, and defrosting buttons may all be ignition sources.

       So the maximum filling capacity of R290 in the refrigerator should be controlled at around 150g; To ensure safe operation, the refrigeration system and control components should be set up in different spaces; Install protectors and flame retardant relays on the compressor; Forced ventilation avoids local concentration accumulation and often uses gas sensors to detect areas prone to leakage; The R290 refrigeration system should be enclosed and undergo strict leak testing before filling with refrigerant.

       Propane R290 refrigerant belongs to the category of hydrocarbon refrigerants. Due to its flammability characteristics, some tools such as handheld hydrocarbon leak detectors, portable combustible gas detectors, handheld hydrogen detectors, high-pressure nitrogen hydrogen mixed gases, lock ring combination tools, specialized snow pressure gauges, refrigerant discharge pliers, etc. need to be used in the installation and maintenance of air conditioners to conduct relevant safety checks to avoid danger, Wear goggles and gloves for personal protection.

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