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Original file (1,650 × 1,275 pixels, file size: 60 KB, MIME type: application/pdf) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
The Mollier enthalpy–entropy diagram for water and steam. The "dryness fraction", x , gives the fraction by mass of gaseous water in the wet region, the remainder being droplets of liquid. An enthalpy–entropy chart , also known as the H – S chart or Mollier diagram , plots the total heat against entropy, [ 1 ] describing the enthalpy of a ...
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The three diagrams are constructed from the P–alpha diagram by using appropriate coordinate transformations. Not a thermodynamic diagram in a strict sense, since it does not display the energy–area equivalence, is the Stüve diagram; But due to its simpler construction it is preferred in education. [citation needed]
The underlying psychrometric parameter data for the psychrometric chart and the Mollier diagram are identical. At first glance there is little resemblance between the charts, but if the chart is rotated by ninety degrees and looked at in a mirror the resemblance becomes apparent. The Mollier diagram coordinates are enthalpy and humidity ratio.
Mollier chart Enthalpy–enthalpy diagram, showing the enthalpy on the vertical axis, and the entropy on the horizontal axis. This chart is useful for calculating the turbine isentropic efficiency, as a vertical line represents expansion at constant entropy, and the height of the line is the enthalpy drop. Also known as h-s diagram. T-s chart ...
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The high-pressure liquid enters a boiler, where it is heated at constant pressure by an external heat source to become a dry saturated vapour. The input energy required can be easily calculated graphically, using an enthalpy–entropy chart (h–s chart, or Mollier diagram), or numerically, using steam tables or software. Process 3–4