Refrigerant Basic Classification, Low-GWP Trend & Cold Room Refrigerant Selection Logic
Refrigerant is the heat transfer medium of refrigeration system; it absorbs heat at evaporator and releases heat at condenser in phase change cycle. Three major categories: HCFC (phasing out), HFC (traditional high GWP), HFO / HFO blend low-GWP refrigerant (mainstream export direction). GWP value is the core index for overseas market compliance; EU, Middle East and many countries have gradually restricted high GWP refrigerants. R404A: widely used traditional frozen refrigerant, high GWP, stable performance, but being phased out in many export destinations. R507A: similar to R404A, single azeotropic blend, good low-temperature performance, also belongs to high GWP product. R448A / R449A: drop-in replacement for R404A, medium low GWP, compatible with most existing systems, popular for cold room retrofit. R744 (CO₂): ultra-low GWP, natural refrigerant, transcritical system, fit blast freezer and food factory, higher system pressure. Xiteliduo refrigeration unit supports R404A, R507A, R448A, R449A, CO₂ options to match different regional environmental regulations. Refrigerant cannot be mixed arbitrarily; different blends have different pressure-temperature curves, oil solubility and charging requirement. Refrigerant leakage detection must be equipped for enclosed machine room; CO₂ leakage will reduce oxygen concentration and bring suffocation risk. Refrigeration maintenance & repair company confirms local F-Gas regulation before quoting, avoid shipment being detained at customs.
FAQ
- What is GWP for refrigerant? Global Warming Potential, greenhouse effect index.
- What are common low-GWP drop-in refrigerants replacing R404A? R448A, R449A.
- What is natural refrigerant CO₂’s code name? R744.
- What advantage of R744? Ultra-low GWP, environment friendly.
- Can we mix different types of refrigerant? Strictly forbidden.
- Which refrigerant is azeotropic and close to R404A performance? R507A.
- What risk of CO₂ refrigerant in machine room? Leakage causes oxygen shortage.
- What document should be checked first for export refrigeration project? Local F-Gas and refrigerant restriction policy.
