Steam Tables Reference Page
Steam: Get the Quality Right AFTER You Table It!

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Intro to Steam Tables

Steam tables are one of the most widely used engineering tools for applying the First Law of Thermodynamics. They provide tabulated thermodynamic properties of water in its liquid, vapor, and two-phase states.

Because water is such an important working fluid in power plants, refrigeration systems, and many industrial processes, its properties have been measured and standardized in great detail. Engineers use steam tables to determine quantities such as enthalpy, internal energy, entropy, and specific volume for saturated and superheated steam.

The videos on this page explain how steam tables are organized and how to use them to solve thermodynamic problems.

Steam: Get the Quality Right AFTER You Table It! Part 1

This video introduces steam tables and explains how to interpret the saturated-property tables. It also introduces the concept of quality, which describes the fraction of vapor present in a liquid–vapor mixture.

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Steam: Get the Quality Right AFTER You Table It! Part 2

This video shows how to use steam tables to solve practical thermodynamic problems, including determining properties in the saturated and superheated regions.

Visuals

Examples and Definitions

Definitions

Steam Table
A tabulation of thermodynamic properties of water in its saturated liquid, saturated vapor, and superheated vapor states. Saturated properties are tabulated as a function of either temperature or pressure, while superheated properties require both temperature and pressure to determine the state.

The tabulated properties typically include specific volume \(\hat{V}\), specific internal energy \(\hat{U}\), specific enthalpy \(\hat{H}\), and specific entropy \(\hat{S}\).

Quality, \(x\)
The mass fraction of vapor in a saturated liquid–vapor mixture.