Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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Performance Comparison of Cubic Equations of State With Two Temperature Dependent Parameters

두 개의 온도 의존 매개변수가 있는 3차 상태방정식의 성능비교

  • 권영욱 (국민대학교 대학원 기계공학과) ;
  • 박경근 (국민대학교 기계자동차공학부)
  • Published : 2001.11.01
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Abstract

Cubic equations of state with two temperature dependent parameters are suggested and optimized using ASHRAE data for methane, propane, carbon dioxide, R-32 and R-134a. Appropriate simple functional forms are assumed for the temperature dependent parameters. The equations tested are Martin, Fuller, Harmens-Knapp, Schmidt-Wenzel. Among them modified Schmidt-Wenzel equation of state appears to be the choice for calculation of saturation properties such as vapor pressures, saturated liquid volumes, and saturated vapor volumes with an average absolute deviation of about one percent over the entire region excluding; the near cirtical.

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