설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제20권11호
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  • Pages.733-738
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  • 2008
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

낮은 오일 농도에서 $CO_2$-PEC9 혼합물의 밀도와 점성 예측

Prediction of Density and Viscosity for $CO_2$-PEC9 Mixture at Low Oil Concentration

  • 윤린 (한밭대학교 기계공학과)
  • Yun, Rin (Department of Mechanical Engineering, Hanbat National University)
  • 발행 : 2008.11.10
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초록

Due to environmental concerns $CO_2$ has been reintroduced as a potential candidate to replace HFCs in refrigeration systems. Oils are always required in a vapor-compression cycle, and thus it is necessary to precisely estimate the thermodynamic mixture properties of $CO_2$-lubricant oil. In the present study, the density and the viscosity of the mixture was calculated by the Redlich and Kwong type EoS and the modified Peng and Robinson type viscosity EoS, respectively. The viscosity model was based on the similarity between P-v-T and T-$\mu$-P relationships. The predicted results were compared with the experimental data of Pens ado et al. whose test conditions were 100$\sim$650 bar of pressure and 303 K$\sim$353 K of temperature with the $CO_2$-POEs mixtures under 92.2 wt.% and 83.3 wt.% of $CO_2$ concentration. The mean deviations of the mixture density were 7.93% and 8.32% for 92.2 wt.% and 83.3 wt.% of $CO_2$ concentration, respectively. Concerning the viscosity, the mean deviations were 4% and 10% for 92.2 wt.% and 83.3 wt.% of $CO_2$ concentration under the Pensado et al.'s test conditions.

키워드

참고문헌

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