R290 Refrigerant

R290 is a new type of environmentally friendly refrigerant, mainly used in central air conditioners, heat pump air conditioners, household air conditioners and other small refrigeration equipment.

R290, also known as propane, has excellent thermal performance and low price, and R290 is compatible with ordinary lubricating oils and mechanical structural materials, does not require synthesis, does not change the content of natural hydrocarbons, and has no direct impact on the greenhouse effect.

1: Physical properties of R290

Under the condition of 45°C condensation temperature, 32°C suction temperature and no subcooling, the volumetric cooling capacity of R290 is similar to that of R22, and 1.5 times that of R134a. It is 2.5 to 3 times that of R600a, which means that for household refrigerators with the same cooling capacity, the structural size of the refrigeration system of the R290 refrigerator is smaller, and the overall space occupied by the refrigerator is reduced.

2 : Safety performance of R290

The disadvantage of using R290 as a refrigerant is the flammability of R290. The compressor, condenser, evaporator, pipeline and other components of the refrigeration system may cause leakage of the working medium, while the thermostat, compressor relay, lighting, Electronic components such as defrost buttons can be sources of ignition. Install protectors and flame retardant relays on the compressor. Control ventilation to avoid local concentration accumulation, and often use gas sensors to detect areas prone to leaks. The R290 refrigeration system should be closed and strictly checked for leaks before charging with refrigerant

3: Performance of R290 Refrigeration System

R290 refrigerator refrigeration system, because R290 has a high specific heat of hot steam, it can have a superheat temperature of 20℃ to 32℃, which can improve the COP of R290 appliances

4 :Conclusion  

R290 has excellent thermal performance, low price, large cooling capacity per unit volume, small size, and physical properties are very similar to R22, which is a direct substitute. Taking corresponding safety protection measures has a good application prospect for environmental protection and energy saving