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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Diagrammes des vapeurs des corps purs

Lines of constant dryness fraction xsometimes called the qualityare drawn in the wet region and lines of constant temperature are drawn in moloier superheated region.

A vertical line in the h—s chart represents an isentropic process. In an isobaric processthe pressure remains constant, so the heat interaction is the change in enthalpy. At first inspection, there may appear little resemblance between r34a charts, but if the user rotates a chart ninety degrees and looks at it in a mirror, the resemblance is apparent.

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The enthalpy coordinate is skewed and the constant enthalpy lines are parallel and evenly spaced. The Mollier diagram coordinates are enthalpy h and humidity ratio x.

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Enthalpy–entropy chart – Wikipedia

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. At the Thermodynamics Conference diagrajme in Los Angeles it was decided to name, in his honor, as a “Mollier diagram” any thermodynamic diagram using the enthalpy as one of its axes.

Later the deviations from the ideal values and they can be calculated considering the isentropic efficiency of the steam turbine used. Above the heavy line, the temperature is above the boiling point, and the dry superheated substance is gas only.

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. It can be used in practical applications such as maltingto represent the grain—air—moisture system. In an isenthalpic processthe enthalpy is constant.

In general such charts do not show the values of specific volumesnor do they show the enthalpies of saturated water at pressures which are of the order of those experienced molloer condensers in a thermal power station. The process 3—4 in a Rankine cycle is isentropic when the steam turbine is said to be an ideal one.

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RaoThermodynamicsUniversities Press, p. By using this site, you agree to the Terms of Use and Privacy Policy.

The work done in a process on vapor cycles is represented by length of hso it can be measured directly, whereas in a T—s diaggramme it has to be computed using thermodynamic relationship between thermodynamic properties. The diagram was created inwhen Richard Mollier plotted the total heat [4] H against entropy S. This page was last edited on 24 Juneat The diagamme property data for the Mollier diagram is identical to a psychrometric chart.

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Diagramme enthalpique — Wikipédia

An mlllier chartalso known as the H — S chart or Mollier diagramplots the total heat against entropy, [1] describing the enthalpy of a thermodynamic system. Wikimedia Commons has media related to H-S diagrams. Retrieved from ” https: In other projects Wikimedia Commons. Views Read Edit View history.