Nist fluid properties

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Official websites use. Share sensitive information only on official, secure websites. It has proven to be an extremely useful tool used by industry, government, and academia, and it is a primary method for the dissemination of work done by the Thermophysical Properties of Fluids Group. REFPROP is a computer program, distributed through the Standard Reference Data program of NIST, that provides thermophysical properties of pure fluids and mixtures over a wide range of fluid conditions including liquid, gas, and supercritical phases. It contains critically evaluated mathematical models, with the goal of representing the properties to within the uncertainty of the underlying experimental data used in their development. These properties such as density, vapor pressure, viscosity, enthalpy, etc. Over the years the scope of the program has grown from the original focus on refrigerants to a much broader chemical slate; for example it currently contains standards vital to the natural gas industry GERG , fluids involved in carbon capture and sequestration processes, cryogens used in space applications, widely used industrial chemicals and solvents, air, water and steam, constituents of biofuels, and constituents of surrogates for complex fluids such as diesel and jet fuels.

Nist fluid properties

Regret for the inconvenience: we are taking measures to prevent fraudulent form submissions by extractors and page crawlers. Box , P. Received: May 20, Published: August 28, Citation: Marzouk OA. Thermo physical chemical properties of fluids using the free NIST chemistry web book database. Fluid Mech Res Int. DOI: Download PDF. Many engineers, students, teachers, academicians, scientists, and researchers need to know intensive thermal, physical, and chemical properties of a fluid at a certain equilibrium state as determined by temperature and pressure, for example. Such properties include the density, specific volume, viscosity, specific heat capacity, thermal conductivity, speed of sound, specific enthalpy, specific entropy, and surface tension. The database is available online free-of-charge and does not require registration for access. Its use is simple, and it offers the user multiple options for the unit to be used for each individual property. Comparisons with two sources support the correctness of the database.

REFPROP is a computer program, distributed through the Standard Reference Data program of NIST, that provides thermophysical properties of pure fluids and mixtures over a wide range of fluid conditions including liquid, gas, and supercritical phases. Pub Type, nist fluid properties. Data, 61 11 ,

Official websites use. Share sensitive information only on official, secure websites. Author s Eric W. Abstract These tables give thermodynamic and transport properties of a variety of fluids, as generated from the equations of state presented in the references below. All extensive properties are given on a mass basis. Not all properties are included for every substance. The references should be consulted for information on the uncertainties and the reference states for E, H, and S.

The resources presented on this website are part of the output from the NIST Cryogenic Technologies Group that existed as a group from to Some limited activities continue today. The activities are divided into four areas: Education. Publications and short courses about cryogenics and its applications for use by the public and professionals. Click on the About Cryogenics link for a brief definition of cryogenics and its uses.

Nist fluid properties

Official websites use. Share sensitive information only on official, secure websites. This program, developed by the National Institute of Standards and Technology NIST , calculates the thermodynamic and transport properties of industrially important fluids and their mixtures. These properties can be displayed in Tables and Plots through the graphical user interface; they are also accessible through spreadsheets or user-written applications accessing the REFPROP dll. It implements three models for the thermodynamic properties of pure fluids: equations of state explicit in Helmholtz energy, the modified Benedict-Webb-Rubin equation of state, and an extended corresponding states ECS model. Mixture calculations employ a model that applies mixing rules to the Helmholtz energy of the mixture components; it uses a departure function to account for the departure from ideal mixing.

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These HFC fluids are used in many applications including refrigeration and air conditioning, the manufacture of insulation materials, and as working fluids in power cycles that are used in geothermal and solar applications. Share Facebook. Fluid Mech Res Int. Visit page. For example, the kinematic viscosity is commonly used with lubrication oils, whereas the dynamic viscosity also called absolute viscosity is common when casting the momentum-transfer equations for gases. National Institute of Standards and Technology. Data, 38 3 , Following the saturation tables, values are given as a function of temperature for several isobars. Regret for the inconvenience: we are taking measures to prevent fraudulent form submissions by extractors and page crawlers. Engineers and researchers may frequently need an easy access to a reliable and rich database of fluid properties at a wide range of conditions during their work.

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Share Facebook. Fluids gases and liquids are encountered heavily in different specializations of engineering and science. The values taken from the NIST Chemistry WebBook database agree well and sometimes are identical to those taken from the other sources. Public: This dataset is intended for public access and use. Applied Tribology: Bearing Design and Lubrication. Version 9. A specific example for using the database is provided for liquid-water at an ambient pressure. Data, 58 4 , Mylona, S. Two of the above eight properties i. Data , 56 12 , pp. The final line gives the properties at the critical point. Looking for U.