Nist fluid properties

Official websites use.

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.

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. Viscosity and thermal conductivity are modeled with either fluid-specific correlations, an ECS method, or in some cases the friction theory method. Download Metadata. Harvested from NIST. View this on Geoplatform. Didn't find what you're looking for? Suggest a dataset here. User Guide. Home National Institute

These properties such as density, vapor pressure, viscosity, enthalpy, etc.

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:

Official websites use. Share sensitive information only on official, secure websites. Property measurements of the very highest accuracies are important for developing the thermodynamic and transport property models for working fluids and reference fluids. More than simply providing data for a high-accuracy equation for, say, a refrigerant, our work, in collaboration with our theoretical colleagues, advances fluid property theory in general. This is the concept of a reference fluid—extensive, high-accuracy data on key fluids allow the development of improved equations of state for the calculation of thermodynamic properties and transport property models.

Nist fluid properties

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. Click on the Publications link for more detailed information. Cryocooler Research.

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Lemmon, E. Marcia Huber. NIST was at the forefront of research on the properties of the original replacement refrigerants, and continues to lead research in properties of new low-global warming potential low-GWP fluids that address climate change. Harvey, A. Share Facebook. Duncan and illustrated by Eric A. Btu lb m. The first source is appendix C in a classic reference in the area of water treatment. The following formulas provide conversions factors from other units used for the above properties to the ones used here: 7 McLinden, M. Data, ,

Official websites use.

Schultz, A. We also actively participate in and lead standards committees related to thermodynamic properties of natural gas. Publisher Info. Applied Tribology: Bearing Design and Lubrication. Vassiliou, C. The first source is appendix C in a classic reference in the area of water treatment. 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. Energy , Metrology , Thermodynamics , Standards and Reference data. Gao, K. In addition, our researchers are involved in work to improve the representation of mixtures comprising fluids in natural gas. 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. 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. 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.