The diagram below can be used to determine enthalpy versus entropy of water and steam.
The Mollier diagram is useful when analyzing the performance of adiabatic steady-flow processes, such as flow in nozzles, diffusers, turbines and compressors.
See also Water - Enthalpy (H) and Entropy (S) for figures and tabulated values at varying temperatures
The quantity of saturated vapor in unit mass of wet vapor , denoted by x , is referred to as the
dryness fraction , or quality,
of the vapor.
Convert to other Units
- 1 bar = 10 5 Pa (N/m 2 ) = 0.1 N/mm 2 = 10,197 kp/m 2 = 10.20 m H 2 O = 0.9869 atm = 14.50 psi (lb f /in 2 ) = 10 6 dyn/cm 2 = 750 mmHg
- 1 kJ/kg = 0.4299 Btu/ lb m = 0.23884 kcal/kg
Example - Enthalpy
The enthalpy in saturated steam ( x = 1, the bold red line in the diagram) with pressure 10 bar can be estimated to aprox.
The value can be verified by using the steam table .
Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more.
Thermodynamics of steam and condensate systems.
Work, heat and energy systems.
The First Law of Thermodynamics simply states that energy can be neither created nor destroyed (conservation of energy). Thus power generation processes and energy sources actually involve conversion of energy from one form to another, rather than creation of energy from nothing.
Entropy and disorder.
Thermal and thermodynamic properties of ice like density, thermal conductivity and specific heat at temperatures from 0 to -100 oC.
Sensible and latent heat of moist air.
Saturated Steam Table with steam properties as specific volume, density, specific enthalpy and specific entropy.
Steam table with sensible, latent and total heat, and specific volume at different gauge pressures and temperatures.
Saturated Steam Table with properties like boiling point, specific volume, density, specific enthalpy, specific heat and latent heat of vaporization.
Vapor and steam enthalpy, specific enthalpy of saturated liquid, saturated vapor and superheated vapor.
Basic steam thermodynamics - entropy diagram.
Enthalpy of steam superheated to temperatures above it's boiling point.
The Universal and Individual Gas Constants in fluid mechanics and thermodynamics. Individual gas constants for the most common gases.
Figures and tables showing the enthalpy and entropy of liquid water as function of temperature - SI and Imperial Units.
Online calculator, figures and tables showing Specific Volume of water at temperatures ranging from 0-370 °C and 32 - 700 °F - Imperial and IS Units.
Thermal properties of water at different temperatures like density, freezing temperature, boiling temperature, latent heat of melting, latent heat of evaporation, critical temperature and more.
Specific heat of Water Vapor - H2O - at temperatures ranging 175 - 6000 K.
Critical point is where vapor and liquid are indistinguishable and triple point is where ice, water and vapor coexist in thermodynamic equilibrium.
Wet steam, dryness fraction and enthalpy.
Introduction and definition of steam quality and dryness fraction including calculating wet steam enthalpy and specific volume.
Wet steam and specific volume.