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A METHOD FOR OPTIMIZING THE STRUCTURE OF EQUATIONS OF STATE AND ITS APPLICATION TO AN EQUATION OF STATE FOR OXYGEN.

[In German. / En allemand.]

Author(s) : EWERS J., WAGNER W.

Type of article: Article

Summary

A CONVENIENT OPTIMIZATION STRATEGY IS PRESENTED FOR OPTIMIZING THE STRUCTURE OF EQUATIONS OF STATE. ITS ALGORITHM HAS BEEN DEVELOPED BY USING THE MOST IMPORTANT PRINCIPLES OF THE BIOLOGICAL EVOLUTION; CONSEQUENTLY THE PROCEDURE IS CALLED EVOLUTIONARY OPTIMIZATION METHOD. WITH THIS METHOD THE STRUCTURE OF A FUNDAMENTAL EQUATION FOR THE FREE ENERGY HAS BEEN OPTIMIZED. THE FIRST PART OF THE OPTIMIZED EQUATION CORRESPONDS TO AN ENLARGED BWR-EQUATION CONTAINING, HOWEVER, TEMPERATURE FUNCTIONS WITH NON-INTEGRAL EXPONENTS; THE REMAINING TERMS ARE SPECIAL FUNCTIONS WORKING ONLY IN THE CRITICAL REGION. THE NEW EQUATION OF STATE FOR OXYGEN HAS BEEN FITTED TO A SELECTED DATA SET COVERING A TEMPERATURE RANGE FROM THE TRIPLE POINT (ABOUT 54 K) TO 300 K AT PRESSURES TO 81,800 KPA AND DENSITIES UP TO THREE TIMES THE CRITICAL ONE.

Details

  • Original title: [In German. / En allemand.]
  • Record ID : 1982-1472
  • Languages: German
  • Source: VDI-Forsch. - n. 609
  • Publication date: 1982
  • Document available for consultation in the library of the IIR headquarters only.

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