Richard Mollier
Encyclopedia
Richard Mollier was a German
professor of Applied Physics
and Mechanics in Göttingen
and Dresden
, a pioneer of experimental research in thermodynamics, particularly for water, steam, and moist air.
Mollier diagrams (enthalpy-entropy chart
s) are routinely used in the design work associated with power plants (fossil or nuclear), compressors, steam turbines, refrigeration systems, and air conditioning equipment to visualize the working cycles of thermodynamic systems.
The Mollier diagram (h-s chart) of enthalpy
of moist air versus its water vapor content (h–x diagram) is equivalent to the Psychrometrics
Chart commonly used in the USA and Britain.
(Austria), continuing at the Technische Fachschule München. He presented his first publications as an outside lecturer for Theoretical Mechanics. After a short stint in Göttingen, he succeeded Gustav Zeuner
in 1897 as Professor of Mechanical Engineering at the Technischen Hochschule Dresden. His 1904 publication New Graphs for Technical Thermodynamics greatly simplified calculations involving thermodynamic processes. His New Tables and Diagrams for Water Vapor, first published in 1906, appeared in six further editions through 1932, as he updated it to reflect new developments.
h as one of its axes. Example: the h–s graph for steam or the h–x graph for moist air.
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...
professor of Applied Physics
Applied physics
Applied physics is a general term for physics which is intended for a particular technological or practical use.It is usually considered as a bridge or a connection between "pure" physics and engineering....
and Mechanics in Göttingen
Göttingen
Göttingen is a university town in Lower Saxony, Germany. It is the capital of the district of Göttingen. The Leine river runs through the town. In 2006 the population was 129,686.-General information:...
and Dresden
Dresden
Dresden is the capital city of the Free State of Saxony in Germany. It is situated in a valley on the River Elbe, near the Czech border. The Dresden conurbation is part of the Saxon Triangle metropolitan area....
, a pioneer of experimental research in thermodynamics, particularly for water, steam, and moist air.
Mollier diagrams (enthalpy-entropy chart
Enthalpy-entropy chart
An enthalpy–entropy chart, also known as the h–s chart or Mollier diagram plots the total heat against entropy, describing the enthalpy of a thermodynamic system. A typical chart covers a pressure range of 0.01 - 1000 bar, and temperatures up to 800 degrees Celsius...
s) are routinely used in the design work associated with power plants (fossil or nuclear), compressors, steam turbines, refrigeration systems, and air conditioning equipment to visualize the working cycles of thermodynamic systems.
The Mollier diagram (h-s chart) of enthalpy
Enthalpy
Enthalpy is a measure of the total energy of a thermodynamic system. It includes the internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure.Enthalpy is a...
of moist air versus its water vapor content (h–x diagram) is equivalent to the Psychrometrics
Psychrometrics
Psychrometrics or psychrometry or Hygrometry are terms used to describe the field of engineering concerned with the determination of physical and thermodynamic properties of gas-vapor mixtures...
Chart commonly used in the USA and Britain.
Education and career
After attending Gymnasium (high school) in Triest, he commenced studies in mathematics and physics at the University of GrazGraz
The more recent population figures do not give the whole picture as only people with principal residence status are counted and people with secondary residence status are not. Most of the people with secondary residence status in Graz are students...
(Austria), continuing at the Technische Fachschule München. He presented his first publications as an outside lecturer for Theoretical Mechanics. After a short stint in Göttingen, he succeeded Gustav Zeuner
Gustav Zeuner
Gustav Anton Zeuner was a German physicist, engineer and epistemologist, considered the founder of technical thermodynamics and of the Dresden School of Thermodynamics.-University and Revolution:...
in 1897 as Professor of Mechanical Engineering at the Technischen Hochschule Dresden. His 1904 publication New Graphs for Technical Thermodynamics greatly simplified calculations involving thermodynamic processes. His New Tables and Diagrams for Water Vapor, first published in 1906, appeared in six further editions through 1932, as he updated it to reflect new developments.
Honors
At the 1923 Thermodynamics Conference held in Los Angeles, it was decided to name, in his honor, as a “Mollier graph” any thermodynamic diagram using the EnthalpyEnthalpy
Enthalpy is a measure of the total energy of a thermodynamic system. It includes the internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure.Enthalpy is a...
h as one of its axes. Example: the h–s graph for steam or the h–x graph for moist air.
Publications
- Die Entropie der Wärme (The Entropy of Heat) 1895
- Dampftafeln und Diagramme des Kohlendioxid (Vapor Tables and Diagrams for Carbon Dioxide) 1896
- Neue Diagramme zur Technischen Wärmelehre (New Graphs for Technical Thermodynamics) 1904
- Neue Tabellen und Diagramme für Wasserdampf (New Tables and Diagrams for Water Vapor) Berlin 1906
