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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Flow Characteristics of Refrigerant-oil Mixtures in a Dehumidifying Cycle

제습 사이클에서의 냉매-오일 혼합물의 유동특성

  • 박세민 (LG전자 디지털 어플라이언스 연구소 냉동공조팀) ;
  • 하삼철 (LG전자 디지털 어플라이언스 연구소 냉동공조팀) ;
  • 신종민 (LG전자 디지털 어플라이언스 연구소 냉동공조팀) ;
  • 이장호 (포항공대 대학원)
  • Published : 2001.01.01
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Abstract

This paper deals with refrigerant-oil mixtures in a dehumidifying cycle. Two different oils such as Alkylbenzene(AB) and Polyol-esters(POE) lubricants are used for R134a to investigate the effect of miscibility on oil returnability. It was found that R134a/AB mixture had more unstable interface between oil and refrigerant than R134a/POE mixture. However, overall flow patterns of both refrigerant-oil mixtures were almost same. The minimum height of oil measured in the compressor was as high as twice of the least permissible height of oil in the compressor required to insure its reliability. Thus, it is considered that immiscible oil, i. e., AB for R134a can be used without causing oil returnability problem.

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References

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