Mollier Diagram for Water-Steam

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Enthalpy-entropy diagram for water and steam

The diagram below can be used to determine enthalpy versus entropy of water and steam.

mollier diagram water

The Mollier diagram is useful when analyzing the performance of adiabatic steady-flow processes, such as flow in nozzles, diffusers, turbines and compressors.

Dryness Fraction

x = dryness fraction - ratio between water as vapor and water as liquid

The dryness fraction is a parameter defining the state of wet vapour.

Convert to other Units

1 bar = 10⁵ Pa (N/m²) = 0.1 N/mm² = 10,197 kp/m² = 10.20 m H₂O = 0.9869 atm = 14.50 psi (lb_f/in²) = 10⁶ dyn/cm² = 750 mmHg
1 kJ/kg = 0.4299 Btu/ lb_m = 0.23884 kcal/kg

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Enthalpy-entropy diagram for water and steam

Dryness Fraction

Convert to other Units

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