#### Steam Tables: Screencasts

Introduces steam tables, explains how to use them, and explains the difference between superheated and saturated steam. Download a spreadsheet that contains complete steam tables. This screencast explains how to use the spreadsheet steam tables, which does interpolation.

We suggest you list the important points in this screencast as a way to increase retention.

Defines vapor quality and compares mass percent and volume percent of steam.

We suggest you list the important points in this screencast as a way to increase retention.

Here is another screencast on how to interpolate to solve problems using steam tables.

##### Important Equation**s:**

For a vapor-liquid mixture,

\[H = xH_v +(1-x)H_L\]

where \(H_v\) is enthalpy of vapor per mass, \(H_L\) is enthalpy of liquid per mass, and \(H\) is enthalpy of the vapor-liquid mixture per mass. Analogous equations exist for internal energy, volume, entropy, and Gibbs Free energy.

The quality of steam (\(x\)):

\[x = \frac{vapor \,\,\, mass}{total \,\,\, mass}\]

Gibbs Phase Rule for non-reactive system:

\[F = 2+C-P\]

where \(F\) is the number of degrees of freedom, \(C\) is the number of components and \(P\) is the number of phases.

##### Important Definition**s:**

**Subcooled water:** liquid whose temperature is below its saturated temperature (e.g., liquid water at room temperature and 1-bar pressure)

**Saturated steam:** vapor at saturation temperature and pressure

**Saturated liquid:** liquid at saturation temperature and pressure

**Saturated steam (dry) or saturated vapor:** quality is one

**Wet steam:** Steam with a quality less than one. The water vapor contains liquid water droplets. For a flow system, the liquid droplets are entrained in the vapor.

**Superheated steam:** the temperature is above the saturation temperature