DIAGRAMME DE MOLLIER R134A PDF

Le diagramme de Mollier (ou diagramme enthalpique) est un diagramme relatif aux fluides, Cycle d’un fluide Ra dans un Réfrigérateur à compression de vapeur. Les frigoristes utilisent des diagrammes enthalpiques pour y tracer le. DownloadDiagramme de mollier ra pdf. If you can then copy the data from the table and post here I d be forever in your debt I have moved from processing. CENTRE DE RECHERCHE RHÔNE-ALPES. Pression absolue. Absolute pressure (bar).

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Commons category link is locally defined. In general such charts do not show the values of specific volumesnor do they show the enthalpies of saturated water at pressures diabramme are of the order of those experienced in condensers in a thermal power station.

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Diagrammes des vapeurs des corps purs

The enthalpy coordinate is skewed and the constant enthalpy lines are parallel and evenly spaced. Idagramme other projects Wikimedia Commons. Later the deviations from the ideal values and they can be calculated considering the isentropic efficiency of the steam turbine used.

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So the expansion process in a turbine can be easily calculated using the h—s chart when the process is considered to be ideal which is the case normally when calculating enthalpies, entropies, etc.

A vertical line in the h—s chart represents an isentropic process.

Retrieved from ” https: Wikimedia Commons has media related to H-S diagrams. At the Thermodynamics Conference held in Los Angeles it was decided to name, in his honor, as a “Mollier diagram” any thermodynamic diagram using diayramme enthalpy as mollie of its axes. This page was last edited on 24 Juneat The diagram was created inwhen Richard Mollier plotted the total heat [4] H against entropy S. On the diagram, lines of constant pressure, constant temperature and volume are plotted, so in a two-phase region, the lines of constant pressure and temperature coincide.

Enthalpy–entropy chart

An enthalpy—entropy chartalso known as the H — S chart or Mollier diagramplots the total heat against entropy, [1] describing the enthalpy of a thermodynamic system. In an isobaric processthe pressure remains constant, so the heat interaction is the change in enthalpy. Above the heavy line, the temperature is above the boiling point, and the dry superheated substance is gas only.

The underlying property data for the Mollier diagram is identical to a psychrometric chart. Lines of constant dryness fraction xsometimes called the qualityare drawn in the wet region and lines of constant temperature are drawn in the superheated region.

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The Mollier diagram coordinates are enthalpy h and humidity ratio x. In an isenthalpic processthe enthalpy is constant.

The work done in a process on vapor siagramme is represented by length of hso it can be measured directly, whereas in a T—s diagram it has to be computed using thermodynamic relationship between thermodynamic properties. The process 3—4 in a Rankine cycle is isentropic when the steam turbine ve said to be an ideal one. It can be used in practical applications such as maltingto represent the grain—air—moisture system.

Enthalpy–entropy chart – Wikipedia

At first inspection, there may appear little resemblance between the charts, but if the user rotates a chart ninety degrees and looks at it in a mirror, the resemblance is apparent. Views Read Edit View history. RaoThermodynamicsUniversities Press, p.