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THERMODYNAMIC CALCULATIONS FOR MIXTURES OF ENVIRONMENTALLY SAFE REFRIGERANTS USING THE LEE-KESLER-PLOCKER EQUATION OF STATE.

Author(s) : FISCHER S., SAND J.

Summary

A COMPUTER MODEL LKPSIM WAS CONSTRUCTED AND INCORPORATED INTO A LORENTZ CYCLE REFRIGERATOR/FREEZER SIMULATION MODEL FOR BINARY REFRIGERANT MIXTURES. TABLES OF REFRIGERANT MOLECULAR WEIGHTS, CRITICAL TEMPERATURES AND PRESSURES, NORMAL BOILING POINTS, ACENTRIC FACTORS, AND COEFFICIENTS FOR FITS TO THE IDEAL GAS HEAT CAPACITY FOR EACH REFRIGERANT ARE BUILT INTO A MENU-DRIVEN DATA INPUT ROUTINE FOR EASE OF USE. RESULTS OF CALCULATIONS OF SATURATED AND SUPERHEATED VAPOUR PROPERTIES WERE COMPARED WITH EXPERIMENTAL DATA AND WITH COMPUTATIONS USING THE CARNAHAN-STARLING-DESANTIS (CSD) EQUATION OF STATE FOR PURE REFRIGERANTS AND FOR BINARY AND T XURS. THERE IS EXCELLENT AGREEMENT BETWEEN THE CALCULATIONS AND THE PUBLISHED DATA FOR PURE R12 AND R22 WITH GREAERISRECE BR2 LKPSIM CALCULATION AGREED MORE CLOSELY WITH OBSERVED SATURATION PROPERTIES FOR MIXTURES OF R143A AND R124 OVER A RANGE OF OPERATING CONDITIONS AND MIXTURE COMPOSITIONS THAN DID THOSE OF THE CSD EQUATION OF STATE.

Details

  • Original title: THERMODYNAMIC CALCULATIONS FOR MIXTURES OF ENVIRONMENTALLY SAFE REFRIGERANTS USING THE LEE-KESLER-PLOCKER EQUATION OF STATE.
  • Record ID : 1991-1014
  • Languages: English
  • Publication date: 1990/07/17
  • Source: Source: USNC-IIR/Proc. 1990 Refrig. Conf., Purdue Univ./ASHRAE, Purdue CFC Conf./Purdue Univ., Ray W. Herrick Lab., Sch. mech. Eng.
    373-382; 6 fig.; 2 tabl.; 11 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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