Solution of Compression Problems Using Mollier Diagrams

The solution of the work compression part of the compressor selection problem is quite accurate and easy when a pressure-enthalpy or Mollier Diagram of the gas is available (see Figures 18-24AH). The charts in the figure present the actual relationship of the gas properties under all conditions of the diagram and recognize the deviation from the ideal gas laws. In the range in which compressibility of the gas becomes significant, the use of the charts is most helpful and convenient. Because this information is not available for many gas mixtures, it is limited to those rather common or perhaps extremely important gases (or mixtures) for which this information has been ...

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