NIST/ASME Steam Thermodynamic Properties Database

The 2022-updated database provides thermophysical properties of water and steam based on IAPWS international standards. It includes properties such as temperature, pressure, density, enthalpy, entropy, viscosity, and thermal conductivity for vapor-liquid, vapor-solid, and liquid-solid saturation calculations. The data is generated by the National Institute of Standards and Technology using a Windows interface for creating tables and plots.

Use Cases

• Calculate vapor-liquid saturation conditions using specified temperature or pressure values.
• Model thermodynamic cycles by analyzing enthalpy and entropy data across different phases.
• Simulate heat transfer processes using thermal conductivity and viscosity properties.
• Design chemical engineering systems requiring density and speed of sound data for fluid flow analysis.

Strengths

• Based on the authoritative International Association for the Properties of Water and Steam (IAPWS) 1995 formulation and subsequent 2008/2011 updates.
• Covers a wide range of thermophysical properties including over 30 specific variables like dielectric constant, surface tension, and Prandtl number.
• Provides capability for saturation calculations across multiple phase boundaries (vapor-liquid, vapor-solid, liquid-solid).

Limitations

• Data is accessible only via a proprietary Windows interface, limiting cross-platform use.
• The underlying raw data tables or programmatic access methods are not directly provided in the description.
• No information is provided on the numerical resolution, uncertainty estimates, or validation ranges for the property calculations.

Provenance

Source

National Institute of Standards and Technology (NIST) and the American Society of Mechanical Engineers (ASME).

Collection Method

Calculated from the IAPWS 1995 formulation for the thermodynamic properties of water, with updates for viscosity (2008), thermal conductivity (2011), and melting/sublimation curves.

Freshness

Last updated in July 2022.