Enthalpy-Entropy (h-s) or Mollier Diagram

The Mollier diagram, is a chart on which enthalpy (h) versus entropy (s) is plotted. It is at times termed as the h-s diagram and has a completely dissimilar shape from the T-s diagrams. The chart has a series of constant temperature lines, a sequence of constant pressure lines, a sequence of constant moisture or quality lines, and a sequence of constant superheat lines. The Mollier diagram is employed only whenever quality is more than 50% and for superheated steam.