Views: 0 Author: Site Editor Publish Time: 2024-07-12 Origin: Site
Comparison of Refrigerant Gas R32, R410a and R290
1. The R32 charge is less, only 0.71 times that of R410A. The working pressure of the R32 system is higher than that of R410A, but the maximum increase does not exceed 2.6%, which is equivalent to the pressure requirement of the R410A system. At the same time, the exhaust temperature of the R32 system is 35.3℃ higher than that of R410A.
2. The ODP value (ozone depletion potential) is 0, but the GWP value (global warming potential) of R32 refrigerant is moderate. Compared with R22, the CO2 emission reduction ratio can reach 77.6%, while R410A is only 2.5%, which is significantly better than R410A refrigerant in CO2 emission reduction.
3. Both R32 and R410A refrigerants are non-toxic, while R32 is flammable. However, among the R22 substitutes R32, R290, R161, and R1234YF, R32 has the highest lower ignition limit LFL (lower ignition limit), which is relatively non-flammable, but still a flammable and explosive refrigerant. Many accidents have occurred in recent years, while R410A has more stable performance.
4. In terms of theoretical cycle performance, the cooling capacity of the R32 system is 12.6% higher than that of R410A, the power consumption increases by 8.1%, and the comprehensive energy saving is 4.3%. The experimental results also show that the refrigeration system using R32 has a slightly higher energy efficiency than R410A. Comprehensively considered, R32 has great potential to replace 410A.
1. The filling amount of R290 and R32 is relatively small, the ODP value is 0, and the GWP value is also much smaller than R22. The safety level of R32 is A2, and the safety level of R290 is A3.
2. R290 is more suitable for medium and high temperature air conditioning systems than R32. The pressure resistance design of R32 is higher than that of R290, and the flammability of R32 is much lower than that of R290. The cost of safety design is low.
3. The dynamic viscosity of R290 is lower than that of R32, and the pressure drop of its system heat exchanger is lower than that of R32, which helps to improve the efficiency of the system.
4. The unit volume refrigeration capacity of R32 is about 87% higher than that of R290. Under the same refrigeration machine capacity, the R290 system should use a compressor with a larger displacement.
5. R32 has a higher exhaust temperature, and the pressure ratio of the R32 system is about 7% higher than that of the R290 system, and the overall energy efficiency ratio of the system is about 3.7% lower.
6. The pressure drop of the R290 system heat exchanger is smaller than that of R32, which helps to improve system performance. However, its flammability is much greater than that of R32, so it requires more investment in safety design.
