R134a table calculator. The data fit and calculation of...
R134a table calculator. The data fit and calculation of constants for HFC-134a were performed for For Vapor-Compression Cycle with R134a Note on Calculations: Refrigerant: R134a. Oct 19, 2025 · Explore our homeowner’s guide to R134a refrigerant—how it works, differences with R1234yf, safe handling and why choosing the right supplier matters. This data was generated using the NIST REFPROP Database (Lemmon, E. R134a, R1234yf Refrigerant (freon). This complimentary calculator is provided for all to use but it receives minimal support. Heat Transfer R-134a Thermodynamic Properties Tables for Temperatures -70 °C to 101. The Engineering ToolBox provides a wide range of free tools, calculators, and information resources aimed at engineers and designers. (Courtesy of John Tomczyk) Created Date 4/7/2005 9:09:31 AM Explore math with our beautiful, free online graphing calculator. It is a fluid that can easily be boiled into a vapor and condensed back into a liquid so the system can use evaporation and condensation to cool your cabin air. Global Warming Potential data listed in the table are taken from Tables 3 and 4 of 2021 ASHRAE Handbook—Fundamentals, Chapter 29. xls. Use the ALT + F11 key to see the functions. It includes specific volume, internal energy, enthalpy, and entropy values for saturated liquid and vapor states as well as for the evaporation process. It enables calculation of temperature, pressure, enthalpy, and entropy for fluid analysis. This article is a continuation of our older article, which was well received by users, so we decided to update the P-H Diagram list and provide you with a more complete list of the world’s commercial refrigerants. xls An R134a calculator for the pressure enthalpy diagram allows you to easily analyze and interpret the properties of the refrigerant. Superheated Refrigerant 134a Calculator Purpose of the calculator Predicting properties of superheated refrigerant 134a The calculator helps you predict R-134a’s properties at various temperatures and pressures, so you can optimize your system’s performance. Download a PDF copy of the pressure enthalpy chart for both Metric and Imperial Units. 2 °C Where: v = Specific volume u = Specific internal energy h = Specific enthalpy s = Specific entropy Temperature Conversions °C to °F or Celsius to Fahrenheit Calculator °F = °C x 5 / 9 + 32 °F to °C or Fahrenheit to Celsius Calculator °C = (°F PythonLibrary-proptables is a Python library offering quick access to thermodynamic property data for R134a and water, ideal for engineering calculations. These devices began using 1,1,1,2-tetrafluoroethane in the early 1990s as a replacement for the more environmentally harmful R-12. Here is the result: Our target superheat is 20. The data fit and calculation of constants for HFC-134a were performed for Calculate and analyze the pressure-enthalpy diagram (p-h diagram) for R134a refrigerant with an online calculator. This is the manual calculation. Saturated refrigerant-134a—Temperature table 966 Table A–12E Saturated refrigerant-134a—Pressure table 967 Table A–13E Superheated refrigerant-134a 968 Figure A–14E P-h diagram for refrigerant-134a 970 Atmospheric gas burner’s orifice and consumption calculation davidlevy 18 Feb 2024 16 Refrigerant filling quantities, capacity chart. Specific heat of superheated vapor (Cp_v) and liquid (Cp_l) are assumed constant for some approximations. Solving problems using R134a refrigerant properties tables such as enthalpy and entropy given a temperature or pressure. A technician can measure total superheat by placing a thermistor or thermocouple at the compressor's inlet and taking the temperature. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Calculate properties of combustion gases. de. Hence, it is safe to use under normal working circumstances. Learn the safe refill process and how it compares to other coolants. Oct 5, 2025 · Refrigerants are the heart of every cooling system, and among the most widely used in the world is Gas Freon 134A (R134a). 1,1,1,2-Tetrafluoroethane is a non-flammable gas used primarily as a "high-temperature" refrigerant for domestic refrigeration and automobile air conditioners. Thermodynamic constants of 1,1,1,2-Tetrafluorethane - R134a - C 2 H 2 F 4: Thermodynamic properties of refrigerant R-134a. Known for its strong cooling performance, reliability, and versatility, R134a has been the industry standard for decades in both HVAC systems and automotive air conditioning. Refrigerants today are often thousands of times more polluting than carbon dioxide (CO2). , Huber, M. 0) developed by the National Institute of Standards and Technology (NIST) for 1,1,1,2-tetrafluoroethane. Mar 9, 2024 · Do you charge R134a liquid or vapor? R134a should typically be charged as a liquid to ensure proper system performance and avoid potential damage to the compressor. 4 bar and 23C the R-134a is a superheated vapor as you found but only properties at T = 20 and 30 are tabulated. imize the performance of FreonTM 134a in these applications. Table C-1 is presented information at regular intervals of temperature while Table C-2 is presented at regular intervals of pressure. Calculate and analyze the pressure-enthalpy diagram (p-h diagram) for R134a refrigerant with an online calculator. What is Global Warming Potential? Global Warming Potential, or GWP, is a measure of how destructive a climate pollutant is. 8, PC Model, R-134a: Superheated Vapor Table thermofluids. What should the pressures be on a 134a prep table? The pressures on a 134a prep table will vary depending on factors such as temperature, system design, and operating conditions. You can freely use this online subcooling calculator that will determine the subcooling immediately (we are also going to use in the R-22, R-410A, and R-134A subcooling calculation examples below to calculator): Subcooling Calculator Insert Gauge And Thermometer Temperatures, Get Subcooling: Here’s how you can use this calculator. For high-precision engineering, consult detailed property tables or specialized software. Table C-3 presents data for superheated vapor over a matrix of temperatures and pressures. Aug 31, 2025 · Discover everything about R134a refrigerant, its chemical properties, applications, and environmental impact. You can easily access the high quality refrigerant chart by clicking on the refrigerants listed in the table. Jan 24, 2025 · One commonly used refrigerant in these systems is R134a, also known as R134 refrigerant. The site includes resources for common engineering Appendix C: Property Tables for R134a Tables C-1 and C-2 present data for saturated liquid and saturated vapor. The GWP of a gas refers to the total contribution to global warming resulting from the emission of one unit of that gas relative to one unit of the reference gas, CO2, which is Saturation tables for refrigerant 134a (v in ft3/lbm, u and h in Btu/lbm, s in Btu/lbm·R) Table-B. L. Entropy S = 1 kJ/kg-K at 0°C for saturated liquid. We recommend that you DO NOT use it: As a resource called by other software for property data In any critical application If you require a reliable source of thermodynamic properties, purchase a copy of REFPROP. R-134a, also known as 1,1,1,2-Tetrafluoroethane, is a hydrofluorocarbon (HFC) refrigerant that has played a significant role in the global cooling industry since the early 1990s. A pressure-temperature chart for R-134a. Saturated R-134a Thermodynamic Properties Tables for Pressures 50 kPa, 100 kPa, 150 kPa, and 200 kPa. Slide the 1st slider to ’70’ since our indoor WB temperature is 70°F, and slide the 2nd slider to ’90’ since we have a 90°F outdoor DB temperature. W. Mollier diagrams included. It was chosen as the preferred equation of state because it provided the most accurate fit of the thermodynamic data over the entire range of temperatures and pressures presented in these tables. An R134a calculator for the pressure enthalpy diagram allows you to easily analyze and interpret the properties of the refrigerant. This gives curve fits for thermal and transport properties of R-134a, which is the major refrigerant used in residential and automotive air-conditioning. New Refrigerants The tables on page 3 through 5 list the approved refrigerant numbers from the latest edition of Standard 34 and addenda that were assigned from 2010 onward. Before 93 we used R-12 for our vehicles and now, as I write this article in 2018, there is a push to phase down R-134a and replace it with the new HFO refrigerant known as R-1234yf. At 1. Table 1. 7. The tables attached were developed based on a refrigerant property database (REFPROP 7. R134a is a refrigerant commonly used in automotive AC systems. It offers detailed technical data and calculations for various fields such as fluid mechanics, material properties, HVAC systems, electrical engineering, and more. Find the temperature, pressure, and enthalpy values for different states of R134a using this online tool. The extent of the single-phase and two-phase data used to generate the correlation is summarized below in Tables 3 and 4. Understand its thermodynamic properties and cycles. For Cars, trucks and tractors A/C. 3: Appendix C - Thermodynamic Properties of R134a Page ID Claire Yu Yan University of British Columbia, Okanagan BCcampus R-134a replaces the CFC R-12 and in few years will replace the HCFC R-22. , McLinden, M. It’s like having a crystal ball for your HVAC system! Optimizing refrigeration Saturation tables for refrigerant 134a (v in ft3/lbm, u and h in Btu/lbm, s in Btu/lbm·R) R134a Pressure Enthalpy Chart. All of the data summarized below were collected using the experimental apparatus described above. 0, National Institute of Standards and Technology, Standard Reference Data Program, Gaithersburg, 2010) REFRIGERANTS The refrigerants used to generate the current correlation are described below in Table 2. 0°F, just as we have calculated manually. Let’s take the previous example with R-134A refrigerant. No garanty for correctness. NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 9. The thermodynamic and physical properties of FreonTM 134a, coupled with its low toxicity, make it a very efficient and safe replacement refrigerant for CFC-12 in many segments of the refrigeration industry, most notably in automotive air conditioning, appliances, small stationary equip Jul 1, 2018 · Ever since 1993 R-134a has been the staple refrigerant for automotive applications. DSP 134a Refrigerant is not flammable at ambient temperatures and atmospheric pressure. net > Daemons > Basics > Tables > R-134a This article is a continuation of our older article, which was well received by users, so we decided to update the P-H Diagram list and provide you with a more complete list of the world's commercial refrigerants. Tables 5-9: A revision of the physical property routines and calculation methods has occurred so that all physical properties used in the calculation are now obtained from the most recent physical property datasheets for each refrigerant. MBWR Coefficients for HFC-134a The MBWR equation of state was used to calculate the tables of thermodynamic properties. Saturated R-134a Thermodynamic Properties Tables Enthalpy, kJ/kb and Entropy, kJ/k-K Where: v = Specific volume u = Specific internal energy h = Specific enthalpy s = Specific entropy Temperature Conversions °C to °F or Celsius to Fahrenheit Calculator °F = °C x 5 / 9 + 32 °F to °C or Fahrenheit to Celsius Calculator °C = (°F - 32 Introduction to Engineering Thermodynamics Appendix C: Thermodynamic Properties of R134a Table C1: Saturated R134a Table C2: Superheated R134a Reference States, IIR Convention Enthalpy H = 200 kJ/kg at 0°C for saturated liquid. Chart p-h R134a. O. Other options include: EES (Engineering Equation Solver) is a software package with built in Calculation of tetrafluorethane : if you found an error, please mail to: wischnewski@peacesoftware. A pressure reading will also be needed at this same location. Calculate online thermodynamic and transport properties of water and steam, based on industrial (IAPWS-IF97) or scientific (IAPWS-95) formulation. Thermodynamic properties are based on simplified correlations. R134a Table The document is a table providing thermodynamic property data for the refrigerant R-134a at different saturation temperatures and pressures. Software applications and libraries (Excel Add-in and ActiveX DLL) for Windows Desktop for calculation of thermodynamic and transport properties ofwater and steam, humid (moist) air, carbon dioxide, R134a, R123, ammonia, methane, nitrogen and oxygen. So you linearly interpolate in that gap to 23C and determine the properties that you are after like specific volume, internal energy, enthalpy, etc. However, DSP 134a becomes combustible when mixed with air under pressure and exposed to strong ignition sources. In this article, we will delve into what R134 refrigerant is and how it works to keep our appliances cool and functioning optimally. ayeb51, f4hwv, zn6fwx, tn7kv, xjplgc, bcjlpv, sum2, 56gi, hsyb1, w9yr1,