Experimental two-phase heat transfer study of R245fa in horizontal mini-channels at high saturation temperatures
| Autor: | Billiet, Marijn, Charnay, Romain, Revellin, Rémi, de Paepe, Michel |
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| Přispěvatelé: | Department of Flow, Universiteit Gent = Ghent University [Belgium] (UGENT), Centre d'Energétique et de Thermique de Lyon (CETHIL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), CETHIL, Laboratoire |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Technology and Engineering
flow boiling experimental mini-channels two-phase high saturation temperature heat transfer coefficient ORC refrigerant [SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph] R245fa multi phase ComputingMilieux_MISCELLANEOUS [SPI.MECA.THER] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph] |
| Zdroj: | 7th European Thermal-Sciences Conference 7th European Thermal-Sciences Conference, Jun 2016, Krakow, Poland Proceedings of 7th European Thermal-Sciences Conference |
| Popis: | Heat transfer measurements for R254fa were conducted. The heat transfer coefficient was determined for a smooth stainless steel tube with an inner tube diameter of 3 mm. The experiments were conducted for three heat fluxes (10, 30 and 50 W/m^2), five mass fluxes (100, 300, 500, 700 and 1000 kg/(m^2.s)) and at three saturation temperatures (40°C, 70°C and 125°C). The experimental data was used to determine the influence of the saturation temperature, mass flux, heat flux and vapour quality on the heat transfer coefficient. At a low saturation temperature, the heat transfer coefficient increases with an increasing mass flux. However, at a high saturation temperature the heat transfer coefficient decreases with an increasing mass flux. Furthermore, the heat transfer coefficient increases with increasing vapour quality at a low saturation temperature. On the contrary, the heat transfer coefficient decreases at higher saturation temperatures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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