Summary
Modeling study for predictions of oil retention and critical refrigerant mass flux in compressor suction line was presented in the current work. Three approaches were developed for prediction of oil retention amount in suction line, namely, annular flow model, flow-pattern based method and empirical void fraction model. The annular flow model assumed that annular flow exists as the flow pattern, while the flow-pattern based method described the flow behavior of refrigerant/oil mixture by the flow pattern classifications and double circle model. Based on the proposed models, new correlations of interfacial friction factor and void fraction were established. The experimental data for R32 with coexistence oil PVE68 inside horizontal, vertical and inclined suction lines were used as the foundation and validation of the models. The results showed that all the models display satisfying prediction for oil retention. The flow-pattern based method exhibited the best results, which yielded the mean absolute deviation of 9.35% and captured 87.83% of the data within ±20% error bands. Moreover, two models for prediction of minimum refrigerant mass flux were recommended in order to ensure successful oil return. These models could serve as tools for operation optimization incorporating the lubricant oil effect.
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Details
- Original title: Modeling of lubricant retention in suction lines with R32/PVE oil mixture.
- Record ID : 30029342
- Languages: English
- Subject: Technology
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 134
- Publication date: 2022/02
- DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.11.010
- Document available for consultation in the library of the IIR headquarters only.
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Visualization study on oil retention and flow c...
- Author(s) : ZENG W., ZHANG Z., HU J., GU B., TIAN Z.
- Date : 2022/08
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 140
- Formats : PDF
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Measurement and correlation development of the ...
- Author(s) : XIE L., ZHUANG D., DING G.
- Date : 2024/06
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 162
- Formats : PDF
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Transient migration of oil at compressor discha...
- Author(s) : WANG X., HAIDER S., HRNJAK P., ELBEL S.
- Date : 2022
- Languages : English
- Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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Oil retention and pressure drop in horizontal a...
- Author(s) : ZOELLICK K., HRNJAK P.
- Date : 2010/07/12
- Languages : English
- Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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Material compatibility of HVAC&R system materia...
- Author(s) : MAJURIN J. A., STAATS S. J., GILLES W.
- Date : 2014/07/14
- Languages : English
- Source: 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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