MollierDiagramme

Mollier Diagramme, also known as the Mollier chart or enthalpy-entropy diagram, is a graphical representation used primarily in thermodynamics to visualize the properties of moist air, refrigerants, and other substances undergoing phase changes or thermal processes. Developed by Richard Mollier in the early 20th century, the diagram provides a comprehensive overview of the relationship between various thermodynamic variables.

The Mollier diagram typically displays enthalpy (h) on the vertical axis and entropy (s) on the horizontal axis. For moist air applications, it often includes lines of constant dry-bulb temperature, wet-bulb temperature, specific humidity, and vapor content. In refrigeration and HVAC systems, the chart illustrates the state changes of refrigerants like R134a, R22, and R410A, showing pressure, temperature, and phase boundaries.

The diagram facilitates engineers and scientists in analyzing processes such as heating, cooling, humidification, dehumidification, and phase transitions. Its visual format allows for quick assessments of energy efficiency, work transfer, and the moisture content in air or refrigerant systems. Variations of the Mollier diagram are available for different fluids, each tailored to the specific phase behavior and thermodynamic properties of the substance.

The usefulness of the Mollier diagram lies in its ability to simplify complex calculations and provide insight into thermodynamic processes, making it a fundamental tool in energy systems, HVAC engineering, and refrigeration technology. Its integration into design and analysis workflows helps optimize system performance and improve energy management.