Specific heat of r134a Baehr, An International Standard Formulation for the Thermodynamic Properties of 1,1,1,2-Tetrafluoroethane (HFC-134a) for Temperatures from 170 4. Phys. = Heat capacity at constant volume in kJ/(kg) (°C) v s = Velocity of sound in m/sec The gas constant, R = 8. K. 325 kPa Reference point for enthalpy and entropy: h f = 200 kJ/kg at 0 °C s f = 1 kJ/kg·K at 0 °C Freon ™ 134a Refrigerant (R-134a) Thermodynamic Properties (SI %PDF-1. Table C-1 is presented information at regular intervals of temperature while Table C-2 is presented at regular intervals of pressure. 8: 10: Isobutane: Specific heat capacity of Isobutane-11. 1,1,1,2-Tetrafluoroethane - R-134a - is an inert gas used primarily as a high-temperature refrigerant for domestic refrigeration and automobile air conditioners. 1,1,1,2-tetrafluoroethane, R-134a, Forane 134a, Genetron 134a, Florasol 134a, Suva 134a or HFC-134a, also known as norflurane (INN), is a haloalkane refrigerant with thermodynamic properties similar to R-12 (dichlorodifluoromethane) but with insignificant ozone depletion potential. 32: Helium: Specific heat capacity of Helium-268. There is currently serious consideration of replacing it with R744 (Carbon Dioxide) in refrigeration and heat pump applications. 2 Heat transfer across a boundary Thermodynamic Properties of R134a Table C1: Saturated R134a. R-134a Thermodynamic Properties Tables for Temperatures -70 °C to 101. Secondly, this may be a silly question but would I be correct in assuming that the specific heat of R134a changes as it condenses at 40 deg C at constant pressure as an example. Densities, specific heats, viscosities and more. R134a¶ References¶ Equation of State¶ Reiner Tillner-Roth and Hans Dieter Baehr. Tillner-Roth and H. What is the specific heat of R134a at 0°C? So far i have only found the specific heat of R134a at 0 deg C saturation which is 1. 1063/1. 44 kJ/kg: Specific heat capacity of a liquid at 0°C and 1 atm: 0. Specific Internal viscosity, thermal conductivity, and heat capacity data for saturated liquid and vapor, in addition to heat capacity data and heat capacity ratios for both saturated and super-heated vapors. 19 Ideal-gas specific heats of various common gases (a) At 808F Gas constant, R c p c v Specific heat capacity of Ethyl alcohol: 20: 2. 012: Surface pressure at 25°C (mN/m) 8. 84: Glycerine: Specific heat capacity of Glycerine: 20: 2. 15: Solubility of water in R134a at 25°C and R134a Property Diagrams: Pressure-Enthalpy Diagram; Enthalpy-Entropy Diagram. Table C-3 presents data for superheated vapor over a matrix of temperatures and pressures. 0% constant-volume heat capacities, and ±0. 7 3. 2 4. kJ/kg. accuracy of the equation of state is estimated to be ±0. May 30, 2022 · Refrigerant r134a (HFC-134, tetrafluoroethane, r-134-a): properties technical characteristics; pressure, temperature, R134a vs R12 comparsion. 314 J/(mole) (K) for HFC-134a, R = 0. Thermal Conductivity¶ Calculation of thermodynamic state variables of Tetrafluorethan - R134a in saturation state, boiling curve Lower limit for calculation: -90 C, 0. Chem. Specific Internal Energy. Data, 23:657–729, 1994. Lower limit for calculation: -90 C, 0. 1052 (psia) (ft3)/lb • °R One atmosphere = 14. 84: Ethylene glycol: Specific heat capacity of Ethylene glycol: 20: 2. D. 6 %âãÏÓ 233 0 obj > endobj xref 233 11 0000000016 00000 n 0000001039 00000 n 0000001123 00000 n 0000001256 00000 n 0000001355 00000 n 0000001668 00000 n 0000001917 00000 n 0000001994 00000 n 0000002486 00000 n 0000002879 00000 n 0000000516 00000 n trailer ]>> startxref 0 %%EOF 243 0 obj >stream xÚb```f``Š``a``Sfàg@~ + s H ‰24 s ˜™#x—¸ lÛð~á›æ“ìKø ä¾8 00 2>e These tables were generated using EES with the substance R134a which implements the fundamental equation of state developed by R. doi:10. 9: 22. Specific Entropy. 28 The Industrial Refrigeration Consortium is a collaborative effort between the University of Wisconsin-Madison and industry. Pressure: Table 4 lists the specific heat capacity at constant pressure of R134a refrigerant-oil mixtures in the saturated liquid phase from (267. 202: Steam viscosity at 25°C (Pa s) 0. Tetrafluoroethane (R-134a) CF 3CH 2F 102. /ftˆ3) Liquid Density (70˚F, lb. Refrigerant (R-134a) Thermodynamic Properties (ENG Units) 2 Equations Ideal Gas Heat Capacity (At Constant Volume) Co v = a + bT + cT 2 + dT3 + f/T2 For SI Units Co v Heat Transfer. Our goal is to improve the safety, efficiency, and productivity of industrial refrigeration systems and technologies. Calculation of thermodynamic state variables of Tetrafluorethan - R134a in saturation state, boiling curve. 34 kJ/kg. T (o C) P (MPa) Specific Volume. 03 0. 08149 374. 15 to 303. The specific heat capacity of R134a also influences the system’s ability to absorb and release heat, which affects the sizing of heat exchangers and other system components. 7: 2. 325 kPa Reference point for enthalpy and entropy: h f = 200 kJ/kg at 0 °C s f = 1 kJ/kg·K at 0 °C Freon ™ 134a Refrigerant (R-134a) Thermodynamic Properties (SI Aug 5, 2017 · Thermodynamic properties of refrigerant R-134a, also known as 1,1,1,2-tetrafluoroethane, R-134a, Freon 134a, Forane 134a, Genetron 134a, Florasol 134a, Suva 134a or HFC-134a and norflurane (INN). 1993 Trichlorofluoromethane (R-11) CCl Refrigerant (R-134a) Thermodynamic Properties (ENG Units) 2 Equations Ideal Gas Heat Capacity (At Constant Volume) Co v = a + bT + cT 2 + dT3 + f/T2 For SI Units Co v accuracy of the equation of state is estimated to be ±0. Thermodynamic properties of refrigerant R-134a. Specific Enthalpy. ) Mar 28, 2005 · The properties tabulated are temperature, vapor pressure, liquid density, vapor volume, surface tension, and the liquid and vapor values of the enthalpy, entropy, specific heat at constant pressure, velocity of sound, viscosity, and thermal conductivity. 6 % in the sound velocity, except in the critical region, based on comparisons with experimental data. 2 °C. 15) K when the lubricant concentrations are (20 Table A–2 Ideal-gas specific heats of various common gases Tetrafluoroethane (R-134a) CF 3CH 2F 102. Ref. Liquid and vapor densities are Properties of gases, fluids and solids. In addition, a comprehensive bibliography of data for R 134a is presented. Related Documents Dichlorodifluoromethane - Properties Properties of saturated liquid Dichlorodifluoromethane R-12 - CCl2F2 - density, specific heat capacity, kinematic viscosity, thermal conductivity and Prandtl number. 059 0. Thermodynamic tables in English and SI units are available in technical bulletins, "Thermodynamic Properties of HFC-134a". 85 kJ/kg: Liquid viscosity at 25°C (Pa s) 0. 696 psia Conversion factor from Work Units to Heat Units: J = 0. Lower limit for calculation: -70 C, 1 bar upper limit: 180 C, 300 bar. 013 bar (wt%) 0. Where: v = Specific volume u = Specific internal energy h = Specific enthalpy s = Specific entropy Table C1: Saturated R134a. 2% in density, ±1. Understanding these implications is essential for selecting the right system components and ensuring optimal system performance. Note: R134a has a Global Warming Potential (GWP) of 1300 with respect to Carbon Dioxide. Engineering ToolBox - Resources, R-134a: 1. 01946 0. 09: Solubility in water at 25°C and 1. Where: v = Specific volume u = Specific internal energy h = Specific enthalpy s = Specific entropy Tables C-1 and C-2 present data for saturated liquid and saturated vapor. 732 (psia) (ft3)/(°R) (lb–mole) for HFC-134a, R = 0. 6 588. 185053 R-134a National [ PHYSICAL PROPERTIES OF REFRIGERANTS • R-134a Environmental Classification Molecular Weight Boiling Point (1atm, ˚F) Critical Pressure (psia) Critical Temperature (˚F) Critical Density (lb. lb. May 30, 2022 · Specific heat capacity of liquid at 25°C and 1 atm: 1. Cp = heat capacity at constant pressure in Btu/(lb) (°F) Cv = heat capacity at constant volume in Btu/(lb) (°F) vs = velocity of sound in ft/sec The gas constant, R = 10. Ratios of specific heat for gases with constant pressure and volume processes. 20: Steam (water) 1. 555958. Saturated R-134a Thermodynamic Properties Tables Enthalpy, kJ/kb and Entropy, kJ/k-K . 015 bar bar upper limit: 100 C, 39 bar. 1052 673. 33: Sulphur dioxide:. J. 0815 kJ/kg·K One atmosphere = 101. /ftˆ3) Heat of Vaporization (bp, BTU/lb. 8: Hydrogen: Specific heat capacity of Hydrogen-252. A International Standard Formulation for the Thermodynamic Properties of 1,1,1,2-Tetrafluoroethane (HFC-134a) for Temperatures from 170 K to 455 K and Pressures up to 70 MPa. Heat Transfer. /ftˆ3) Vapor Density (bp. m 3 /kg. wma puypxeb fwgqt yyhng lepydrx kwtth gzfh liueug xiwkkg dncb xin ojql yvh gmblf llwdmx