Evaporation Heat Transfer and Pressure Drop of Low-Global Warming Potential Refrigerant HFO-1234yf in 6.95-mm Horizontal Smooth Tube
This study investigated the evaporative heat transfer coefficient and pressure drop characteristics of R-1234yf in a horizontal tube with an inner diameter of 6.95 mm under various experimental conditions. The heat transfer coefficient increased with an increase in quality but showed a sharp decreas...
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MDPI AG
2021-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/19/6325 |
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| author | Chang-Hyo Son Nam-Wook Kim Jung-In Yoon Sung-Hoon Seol Joon-Hyuk Lee |
| author_facet | Chang-Hyo Son Nam-Wook Kim Jung-In Yoon Sung-Hoon Seol Joon-Hyuk Lee |
| author_sort | Chang-Hyo Son |
| collection | DOAJ |
| description | This study investigated the evaporative heat transfer coefficient and pressure drop characteristics of R-1234yf in a horizontal tube with an inner diameter of 6.95 mm under various experimental conditions. The heat transfer coefficient increased with an increase in quality but showed a sharp decrease in the high-quality area. In addition, the heat transfer coefficient increased as the mass flux, heat flux, and saturation temperature increased. Although R-1234yf and R-134a presented similar heat transfer coefficients, that of R-134a was higher. The pressure drop increased with an increase in the quality and mass flux but decreased with an increase in the saturation temperature. The pressure drop of R-134a was larger than that of R-1234yf. In light of the flow pattern diagram by Taitel and Dukler, most of the experiments were included in the annular flow region, and some regions showed intermittent and stratified corrugated flow regions. Kandlikar’s heat transfer coefficient correlation provided the best prediction for the experimental database, with approximately 84% of the predicted data within ±30%. Moreno Quibén and Thome’s equation for pressure drop predicted approximately 88.71% of the data within ±30%. |
| first_indexed | 2024-03-10T07:02:33Z |
| format | Article |
| id | doaj.art-2284a8b253234fc2998bcdab77d6aafd |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T07:02:33Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-2284a8b253234fc2998bcdab77d6aafd2023-11-22T16:02:39ZengMDPI AGEnergies1996-10732021-10-011419632510.3390/en14196325Evaporation Heat Transfer and Pressure Drop of Low-Global Warming Potential Refrigerant HFO-1234yf in 6.95-mm Horizontal Smooth TubeChang-Hyo Son0Nam-Wook Kim1Jung-In Yoon2Sung-Hoon Seol3Joon-Hyuk Lee4Department of Refrigeration and Air-Conditioning Engineering, College of Engineering, PuKyong National University, Busan 48513, KoreaR&D Division Institute, LG Electronics Inc., Masan 51722, KoreaDepartment of Refrigeration and Air-Conditioning Engineering, College of Engineering, PuKyong National University, Busan 48513, KoreaDepartment of Refrigeration and Air-Conditioning Engineering, College of Engineering, PuKyong National University, Busan 48513, KoreaDepartment of Refrigeration and Air-Conditioning Engineering, College of Engineering, PuKyong National University, Busan 48513, KoreaThis study investigated the evaporative heat transfer coefficient and pressure drop characteristics of R-1234yf in a horizontal tube with an inner diameter of 6.95 mm under various experimental conditions. The heat transfer coefficient increased with an increase in quality but showed a sharp decrease in the high-quality area. In addition, the heat transfer coefficient increased as the mass flux, heat flux, and saturation temperature increased. Although R-1234yf and R-134a presented similar heat transfer coefficients, that of R-134a was higher. The pressure drop increased with an increase in the quality and mass flux but decreased with an increase in the saturation temperature. The pressure drop of R-134a was larger than that of R-1234yf. In light of the flow pattern diagram by Taitel and Dukler, most of the experiments were included in the annular flow region, and some regions showed intermittent and stratified corrugated flow regions. Kandlikar’s heat transfer coefficient correlation provided the best prediction for the experimental database, with approximately 84% of the predicted data within ±30%. Moreno Quibén and Thome’s equation for pressure drop predicted approximately 88.71% of the data within ±30%.https://www.mdpi.com/1996-1073/14/19/6325R-123yfheat transferpressure droplow-GWPHFOs |
| spellingShingle | Chang-Hyo Son Nam-Wook Kim Jung-In Yoon Sung-Hoon Seol Joon-Hyuk Lee Evaporation Heat Transfer and Pressure Drop of Low-Global Warming Potential Refrigerant HFO-1234yf in 6.95-mm Horizontal Smooth Tube Energies R-123yf heat transfer pressure drop low-GWP HFOs |
| title | Evaporation Heat Transfer and Pressure Drop of Low-Global Warming Potential Refrigerant HFO-1234yf in 6.95-mm Horizontal Smooth Tube |
| title_full | Evaporation Heat Transfer and Pressure Drop of Low-Global Warming Potential Refrigerant HFO-1234yf in 6.95-mm Horizontal Smooth Tube |
| title_fullStr | Evaporation Heat Transfer and Pressure Drop of Low-Global Warming Potential Refrigerant HFO-1234yf in 6.95-mm Horizontal Smooth Tube |
| title_full_unstemmed | Evaporation Heat Transfer and Pressure Drop of Low-Global Warming Potential Refrigerant HFO-1234yf in 6.95-mm Horizontal Smooth Tube |
| title_short | Evaporation Heat Transfer and Pressure Drop of Low-Global Warming Potential Refrigerant HFO-1234yf in 6.95-mm Horizontal Smooth Tube |
| title_sort | evaporation heat transfer and pressure drop of low global warming potential refrigerant hfo 1234yf in 6 95 mm horizontal smooth tube |
| topic | R-123yf heat transfer pressure drop low-GWP HFOs |
| url | https://www.mdpi.com/1996-1073/14/19/6325 |
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