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 Equations:
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 Definitions:
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