Nist fluid properties

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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. Viscosity and thermal conductivity are modeled with either fluid-specific correlations, an ECS method, or in some cases the friction theory method.

Nist fluid properties

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. The user can select from a variety of units, flash calculations, properties, tables and plots. 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. The Montreal Protocol may be the most successful environmental agreement in history, with strong evidence for the recovery of the ozone layer. The HFCs are extremely potent greenhouse gases that can be hundreds to thousands of times more potent than carbon dioxide, contributing significantly to climate change and are now subject to regulation.

The references should be consulted for information on the uncertainties and the reference states for E, H, and S.

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.

The National Institute of Standards and Technology NIST uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. NIST is an agency of the U. Department of Commerce. Neutral Thermochemical data compiled by Hussein Y. Afeefy , Joel F. Liebman , Stephen E. Stein , Donald R. Burgess, Jr.

Nist fluid properties

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. The user can select from a variety of units, flash calculations, properties, tables and plots. 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. The Montreal Protocol may be the most successful environmental agreement in history, with strong evidence for the recovery of the ozone layer.

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Gao, K. 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. Data 60 12 : , This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and build upon your work non-commercially. Michailidou, E. T, Penoncello, S. If carbon capture and sequestration CCS becomes widely used, it will be necessary to compress and transport large amounts of CO 2 through pipelines. License: See this page for license information. The most recent release, version 9. Reference data. Not all properties are included for every substance. Interested readers are encouraged to explore the capabilities of this free and user-friendly online database. Peer Review System. It is important to know the thermophysical properties, including the location of the phase boundary dew-point line of carbon dioxide and its mixtures.

Official websites use.

Two lines are given for each temperature except at the critical point ; the first line gives the values of the liquid phase note the high density and the second line gives the values of the vapor phase at low densities. License: See this page for license information. Such properties include the density, specific volume, viscosity, specific heat capacity, thermal conductivity, speed of sound, specific enthalpy, specific entropy, and surface tension. This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and build upon your work non-commercially. Created January 1, , Updated June 2, Data, 38 3 , Viscosity and thermal conductivity are modeled with either fluid-specific correlations, an ECS method, or in some cases the friction theory method. If there is no sharp discontinuity in density, all data in the table refer to the supercritical region i. The final line gives the properties at the critical point. 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. By selecting external links, you will be leaving NIST webspace. Data, 60 5 , Disclaimers Certain commercial equipment, instruments, materials, systems, software, and trade names may be identified throughout this site in order to specify or identify technologies adequately. McLinden, M.