R134a Refrigerant Klea 134a Widely accepted as the most appropriate alternative for R-12 over the majority of the application range for both retrofit and new equipment. Figure 4 Vapor pressure Vs Evaporator temperature for R32, R152a and R134a (Bolaji B.O. Refrigerants - Temperature and Pressure Charts - Temperature and pressure chart for refrigerants R22, R410A, R12, R134A, R401A, R409A, R502, R404A, R507A, R408A and R402A Thermodynamic Properties of Refrigerant R-22 - Properties of R-22 - vapor volume, enthalpy and entropy at pressure Refrigerant R134a Properties Thermodynamic properties of refrigerant R134a Sponsored Links 1,1,1,2Tetrafluoroethane, R134a Genetron 134a Suva 134a HFC134a R134a Properties Imperial Units Temperature ( o F) Pressure We measured the vapor pressure of chlorodifluoromethane (commonly known as R22) at temperatures between 217.1 and 248.5 K and of 1,1,1,2-tetrafluoroethane (commonly known as R134a) in the temperature range 214.4 to 264.7 K using a comparative ebulliometer. R134a Pressure Temperature Chart 14 4.73 3.72 53.88 16 5.04 4.03 58.43 18 5.37 4.36 63.20 20 5.72 4.70 68.21 22 6.08 5.07 73.46 24 6.46 5.44 78.95 26 6.85 5.84 84.70 28 7.27 6.26 90.71 30 7.70 6.69 96.99 32 8.15 7.14 103.55 vapor pressure, latent heat, liquid and vapor density, liquid and vapor viscosity, and liquid and vapor ther-mal conductivity of R152a, R1234ze(E), M1, M2, M3, and R134a for wide range of temperatures (between 220 C and 80 C) are Pressure Conversions kPa to psi, 0.145038 lbs/in 2 = 1kPa / 6.89479 (kPa / psi) or Divide kPa by 6.89479 psi to kPa, 6.89476 kPa = 1 psi (multiply psi by 6.89476) Volume Conversions m 3 / kg to in 3 /lbs, 27679.9 in 3 /lbs = 1 m With R134a, the A/C compressor is lubricated with special synthetic refrigerant oils, for example. Pressure drop during condensation from superheated vapor is reported in this paper. The vapor pressure curves of R134a and other refrigerants are sometimes very similar, therefore it is not possible to make a certain distinction solely by pressure. Table 4. [211* 79 Arita et al. et al) An evaporator vapor pressure of R152a, RE170 and R600a is lower than that of R134a as shown in Figure 4 For 1,1,1,2-tetrafluoroethane at pressures between 220.8 and 1017.7kPa (corresponding to temperatures in the The thermodynamic properties of R134a and R123 are formulated using a modified Benedict..JNebb-_Flubin (MBWR) equation of state fit to experimental measure ments of the critical point, vapor pressure Thermal conductivity of R134a and R141b within the temperature range 240307 K at the saturation vapor pressure Authors Authors and affiliations M. Papadaki M. Schmitt A. Seitz K. Stephan B. R134a. These data are A very good match to R-12 for air conditioning, high and medium temperature usage. Vapor Buoyancy and Radial Acceleration in Capillary Viscometers A. Laesecke,1,2 T. O. D. Luddecke,1,3 R. F. Hafer,1 and D. J. Morris1 Received December 1. Vapor Density 3) At evaporating conditions in the system, the pressure of RED TEK 12a will be slightly higher than either R12 or R134a, and in condensing conditions, the pressure of From the aspect of viscosity, the liquid and vapor viscosity of R134a is slightly lower than R1234ze(E), which may also cause the different friction pressure https://inspectapedia.com/aircond/Refrigerant_Pressures.php This table makes it possible to determine the vapor pressure acting on the column of liquid in a vessel if the temperature of the vessel is known. Figure 3: Local pressure drop in the header (nitrogen and R134a vapor) - "Single-phase flow pressure drop of R134a vapor and liquid in the vertical header of multi-pass microchannel heat exchanger." liq at 0 C HFO-1234yf R134a Thermodynamic Analysis Typical MAC Condition 0 5 10 15 20 25 30 35-10 -5 0 5 101520 Temperature (oC) Sat. The Iglesias vapor pressure equation is based upon a method proposed by Chur chill and Usagi2. The vapor pressure curves of R134a and other refrigerants are sometimes very similar, therefore it is not possible to make a certain distinction solely by pressure. Therefore, R134a has slightly lower friction pressure drop than R1234ze(E). [23] 43 Baehr and R134a Refrigerant in Vapour Compression Cycle: A Review Paper Rajeev Satsangi 1 , A. Dheeraj 2 , Sunil Kumar 3 , Ajay Kumar 4 , Himanshu Singh 5 , Neeraj Satsangi 6 1,2,3,4,5 Department of Mechanical Engineering, Dayalbagh Educational Institute, Agra, UP, India The thermodynamic properties including saturated vapor pressure, latent heat, liquid and vapor density, liquid and vapor viscosity, and liquid and vapor thermal conductivity of R152a, R1234ze(E), M1, M2, M3, and R134a for wide. With R134a, the A/C compressor is lubricated with special synthetic refrigerant oils, for example. [22] 3 Zhu et al. Critical Pressure bara 57.82 psia 838.61 Critical Density kg/m 3 424.00 lb/ft 3 26.47 Normal Boiling Point C-51.651 F-60.972 Latent Heat of Vapourisation at Atmospheric Pressure kJ/kg 381.86 BTU IT Pressure (bar) Reference State: h = 200 kJ/kg, s = 1.00 kJ/kg-K sat. Saturated Vapor Pressure, Boiling Point(dew point), Latent Heat of Vaporization are saturated properties, just enter One parameter to calculate them! An ebulliometer has been used to measure the vapor pressure of HFC-143a at 32 temperatures between 236 and 279 K (-35 to 43 F); the corresponding pressures range from 161 to 751 kPa (23 to 109 psia).