Steam Tables




There are three main types of steam tables that the engineer must be able to use the, (1) Saturation Tables as a function of pressure; (2) Saturation Tables as a function of temperature and (3) Superheated Steam Tables. Graphically the steam tables show the values of the outer dome on the pressure-enthalpy diagram. The following figure shows the points that are selected for the steam tables. This figure shows the values as a function of pressure.

Steam Table as a Function of Pressure for the Mechanical PE Exam

The following figure shows the points that are selected for the steam tables. This figure shows the values as a function of temperature.

Steam Table as a Function of Temperature for the Mechanical PE Exam

There are also steam tables for steam in the super-heated region. These steam tables are shown as a function of pressure and temperature. These values are selected because they are the easiest to measure in practice.

Superheated Steam Table for the Mechanical PE Exam

The steam tables show that as temperature increases the specific volume, the enthalpy and the entropy increase. As pressure increases there is a decrease in specific volume, enthalpy and entropy.