What are the advantages and disadvantages of commonly u […]
What are the advantages and disadvantages of commonly used refrigerants for air conditioning
Currently, only R410a and R32 refrigerants are used in home air conditioners to replace R22 refrigerants. Today, CRR Intercooler performs a simple comparative analysis on the characteristics of R22, R410a and R32 air-conditioning refrigerants.
1. Thermophysical properties: R32 refrigerant charge can be reduced, which is only 0.71 times that of R410a. The working pressure of R32 system is higher than R410a, but the increase does not exceed 2.6%, which is equivalent to the pressure requirements of R410A system. At the same time, R32 system The exhaust temperature rises 35.3°C higher than that of R410A.
2. Environmental protection features: ODP value (ozone depletion potential value) is 0, but R32 has moderate GWP value (global warming potential value). Compared with R22, the CO2 emission reduction ratio can reach 77.6%, while R410a is only 2.5% , It is significantly better than R410a in terms of CO2 emission reduction.
3. Safety: R32 refrigerant and R410a refrigerant are non-toxic, while R32 is flammable, but among several alternatives to R22, R32, R290, R161, and R1234YF, the lower limit of combustion of R32 (LFL) is high. Among several refrigerants, R32 is the least flammable.
4. Cycle performance: 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 overall energy saving is 4.3%. The experimental results also show that the cooling system using R32 has a slightly higher energy efficiency ratio than R410a. .