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On the psychrometric chart.

Author(s) : SHAARAWI M. A. el-

Summary

The paper revises the basic phychrometric relations and describes the procedures used to construct psychrometric charts with rectangular or oblique-angle coordinates. Using perfect gas laws and other simplifying assumptions, many constant-property lines may be approximated by linear relationships on a psychrometric chart with rectangular coordinates of dry-bulb temperature and humidity ratio. Without any or with fewer thermodynamic approximations, the same constant-property lines are shown to be identically straight on a psychrometric chart with oblique-angle coordinates of enthalpy and humidity ratio. The paper recommends a method for teaching undergraduate students how to construct a psychrometric chart and presents auxiliary sketches that have proved to be useful means of demonstration.

Details

  • Original title: On the psychrometric chart.
  • Record ID : 1995-2067
  • Languages: English
  • Source: ASHRAE Transactions 1994.
  • Publication date: 1994
  • Document available for consultation in the library of the IIR headquarters only.

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