설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)
- 제7권1호
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- Pages.98-111
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- 1995
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- 1229-6422(pISSN)
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- 2465-7611(eISSN)
기체냉매의 PVT 거동을 나타내기 위한 상태방정식
An Equation of State for the PVT Behavior of Gaseous Refrigerants
초록
The objective of this work is to investigate the form of equations of state for specific refrigerants. In particular, equations of the extended van der Waals form have been studied. As a result, a new equation of state has been developed and tested over ranges of pressure and density up to 5 and 1.5 times critical, respectively. The equation of state separates the compressibility factor into two parts. One is the repulsive compressibility factor and the other is attractive. The former is in the same form of Carnahan-Starling's repulsive term with constant hard-sphere volume. The latter is based on a combination of two different functions linear to density. The equation of state developed here has 12 adjustable parameters and correlates PVT data successfully. All properties are in reduced forms.