How do you use thermodynamics steam tables?

Answer 1

The steam tables have 16 columns as follows:

pressure (absolute), temperature, specific volume of vapor, specific volume of liquid, heat of the liquid, heat of vaporization, total heat of the vapor, entropy of the liquid, entropy of vaporization, entropy of the vapor, internal heat of the liquid, internal heat of vaporization, and internal heat of the vapor (occasionally the external heat of the liquid, vaporization and vapor are included)

If the temperature and pressure of steam are known then cross referencing the heat or the volume of a known quantity of the steam can be done.

the heat content(enthalpy) of the liquid or vapor can be extrapolated from the chart, as can the entropy and internal energy. The enthalpy less the internal energy = the external energy (or the actual energy required to expand the liquid to a vapor)

By determining the starting heat content of steam and final or exhaust heat content of steam the efficiency of a steam engine can be determined. Along with these calculations are the determinations of heat losses, steam quality, loss to entropy,...etc. all calculated using various instruments and the steam tables.

Answer 2

To use thermodynamics steam tables, find the desired temperature and pressure of steam in the tables and use the corresponding values to calculate properties such as specific volume, enthalpy, entropy, etc. This information is helpful in analyzing and designing steam-based systems.