Sede Legale: Via IV Novembre, n CERANO (NO) Italy Fax R439A

Transcription

1 R439A R439A is a new environment-friendly refrigerant, developed to replace R22 and R410A in household air conditioning / heat pump, industrial process refrigeration and cold-storage refrigeration etc. Technique Characters: 1. Environment-Friendly, No CFCs and HCFCs; 2. Non-Toxic and Non-Flammable; 3. Thermophysical Properties similar to R410A; 4. No Need to Modify the Existing System and Lubricant Oil; 5. Drop-in. 1. Physical and Chemical Data Mixture: Difluoromethane (HFC-32) CAS Pentafluoroethane (HFC-125) CAS Isobutane (HC-600a) CAS Form: Liquefied Gas Color: Clear, Colorless Odor: Ether (slight) Purity: 99.8% Moisture: 10 mg/kg Acidity (Count as HCl): 0.1 mg/kg High boiling residue: 50 mg/kg Boiling Point: C Average Vapor Pressure of Saturated Liquid: 16,58 Bar at 25 C 14,47 Bar at 50 C Vapor Density: C Liquid Density: C % Volatiles: 100 WT% Evaporation Rate: >1 (CC14=1.0) 2. Main Technique Parameters Main technique parameters of R439A and R410A are listed in Table 1. It shows that R439A has the following thermophysical parameters very similar with R410A. The curves of saturated vapor

2 pressure of R439A and R410A are showed in Figure 1. It shows that R439A has near saturated pressure curve as R410A. Table 1. Main technique parameters of R439A and R410A Refrigerant R410A R439A Molecular Weight Boiling Temperature ( C) Critical Temperature ( C) Critical Pressure (MPa) Latent Heat 25 C (kj/kg) Density 25 C (kg/m 3 ) Saturated Liquid Saturated Vapor Cp 25 C (kj/kg K) Saturated Liquid Saturated Vapor Thermal Conductivity Sat. Liquid 40 C (mw/m K) Sat. Vapor 5 C Viscosity (mpa s) Sat. Liquid 40 C Sat. Vapor 5 C R410A DYR-3 p / MPa T / O C Figure 1. Curves of Saturated Vapor Pressure of R439A and R410A.

3 3. Environmental Parameters The Ozone Depletion Potential (ODP) and Global Warming Potential (GWP) values of R439A and R410A are listed in Table 2. It shows that R439A has zero ODP value as R410A and lower GWP value than R410A. Table 2. Environmental parameters of R439a and R410a Refrigerant ODP GWP R410A R439A Safety R439A is a mixed alternative contained three components. R439A is non-toxic and nonflammable. 5. Cycle Performance Parameters The theoretical cycle performance parameters of R439A and R410A are listed in Table 3 in the standard cycle condition, i.e. the evaporating temperature is 7.2 C, the condensing temperature is 54.4 C, the superheated temperature is 11.1 C, the subcooling temperature is 8.3 C and the adiabatic efficiency of compressor is 0.8. In Table 3, pe is the evaporating pressure, pc is the condensing pressure, T2 is the exhausting temperature of compressor, T is the glide temperature, COP is the coefficient of performance, q0 is the capacity per mass and qv is the capacity per volume. Among these, COP, q0 and qv are the relative values to R410A. It shows that R439A has the following cycle performance very similar with R410A. Refrigerant Table 3. Cycle performance parameters of R439A and R410A. pe / kpa pc / kpa T2 / C T / C COP q0 qv R410A R439A

4 6. Compatibility and Miscibility According to the results of the compatibility tests based on present international standards, R439A is compatible with metals, plastics and elastic materials of original systems of R410A. It doesn t need to change any component. According to the results of the miscibility tests, R439A is miscible with POE oil and PAG oil, and even with MO oil. In addition, R439A is compatible with R410A and almost has the same system charge weight. If R410A leaked, R439A could be charged in systems directly. On the contrary, R410Acould be used if R439A leaked. More informations on our web-site ;

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