As the importers,do you know How to choose R32 refrigerant and R290 refrigerants?
R32 refrigerant basic performance
Chinese name: difluoromethane; molecular formula: CH2F2;
Physical properties: colorless, odorless, slightly burning (A2 level). Refrigerant R410A is non-toxic and non-flammable (A1 level);
Non-explosive, non-toxic, flammable, but still a safe refrigerant.
R22 GWP value is 675.
R290 refrigerant basic performance
Chinese name: propane; molecular formula: C3H8
Appearance and properties: colorless gas, pure odorless;
Solubility: slightly soluble in water, soluble in ether and ethanol;
Flash point (℃): -104;
Upper explosion limit% (V / V): 9.5;
Lower explosion limit% (V / V): 2.1;
Relative density (air = 1): 1.56;
Radon combustion heat (kJ / mol): 2217.8
Ignition temperature (℃): 450 ~ 470;
our sum up:
1. The global warming coefficient of R32 refrigerant is 1/3 of R410A, which is more environmentally friendly than traditional R410A and R22 refrigerants, but R32 has a certain flammability.
2. Compared with R410A refrigerant, the saturation pressure of R32 is about 3%, the exhaust temperature is about 8-15 ℃, the power is about 3-5%, and the energy efficiency is about 5%.
3. Under the same operating conditions and the same operating frequency of the compressor, the cooling capacity and energy efficiency of the R32 system are about 5% higher than the R410A refrigerant.
Health hazards: simple asphyxiation and anesthesia. Short-term exposure to 1% propane does not cause symptoms; concentrations below 10% only cause mild dizziness; exposure to high concentrations can cause anesthesia and loss of consciousness; extremely high concentrations can cause suffocation.
Hazardous characteristics: flammable gas, mixed with air can form explosive mixtures, and there is a danger of burning and explosion when encountering heat sources and open flames.
6. Low freezing point and larger latent heat of evaporation make the cooling rate faster in unit time; smaller isentropic compression ratio does less work to make the compressor work easier and extend the life of the compressor; small molecular weight, good fluidity and more pressure Low, reducing the load on the compressor. Using R290 refrigerant, the energy saving rate can reach 15 ~ 35%.