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Material Measurement Laboratory / Applied Chemicals and Materials Division

Thermophysical Properties of Fluids Group

Projects/Programs

Displaying 1 - 6 of 6
Cover of the ASME International Steam Tables for Industrial Use, Third Edition

Contributions to International Standards on the Properties of Water

Ongoing
Water is probably the most widely used industrial fluid and it is important to have internationally accepted standards for its properties. This information is crucial to the analysis and design of thermal power cycles, as well as for climate studies including the hydrosphere. (Here is a summary of
SLowFlowS diagrams

Flow Metering and Properties for Semiconductor Process Gases

Ongoing
A type of flow meter called a mass flow controller (MFC) is used to regulate gas flow in order to produce the desired structures during chip fabrication. As semiconductor manufacturing advances, the requirements on MFC performance are increasingly strict: any process variation can reduce device
A collage of REFPROP screens

Reference Fluid Thermodynamic and Transport Properties Database (REFPROP)

Ongoing
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
Color coded refrigerant bottles

Refrigerants and Working Fluids

Ongoing
We apply a wide range of experimental apparatus to the task of measuring the properties of working fluids. Many of these instruments are the same as those used in our work on standard reference fluids, and our data for working fluids approach the accuracy of the reference fluids. Thermodynamic
drop

Standard Reference Measurements

Ongoing
State-of-the art property measurements have been the hallmark of the Fluid Properties Group for more than four decades. Many of these measurements have been carried out on one-of-a-kind instruments developed at NIST. In some cases the older instruments are still among the very best of their kind