Mollier Diagram: Explained with Definition and the Methods to Use the Diagram

The Mollier diagram is a psychrometric chart but with a different orientation and scale. A psychrometric chart is a graphical representation of the thermodynamic properties of moist air, such as temperature, humidity, enthalpy, pressure, etc.

The Mollier diagram shows the relationship between enthalpy, entropy, pressure, and temperature of a substance.

An indicator diagram is a chart used to measure the thermal or cylinder performance of reciprocating steam and internal combustion engines and compressors.

The vertical lines represent isentropic process in the Mollier diagram.

The Mollier diagram includes constant pressure lines, constant temperature lines, constant specific volume lines, and dryness fraction lines.