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Flow regime based heat transfer correlation for R245fa in a 3 mm tube

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Abstract
241 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 five mass fluxes (100, 300, 500, 700 and 1000 kg/(m2 s)), three heat fluxes (10, 30 and 50 kW/m2) and at three saturation temperatures (40 °C, 70 °C and 125 °C). The experiments were used to determine the influence of the saturation temperature, mass flux, heat flux, vapour quality and flow regime 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. Due to the fact that most heat transfer models found in literature are developed for low saturation temperatures and one flow regime, the heat transfer coefficients predicted by the existing models do not comply very well with the experimental data. Thus, a new heat transfer correlation for R254fa was proposed. The new correlation has a Mean Absolute Error of 11.7% for the experimental data of a tube with an inner tube diameter of 3 mm. Finally, this new correlation was also verified with R245fa datasets of other authors.
Keywords
two-phase, refrigerant, heat transfer measurement

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Chicago
Billiet, Marijn, Bernd Ameel, Romain Charnay, Rémi Revellin, and Michel De Paepe. 2018. “Flow Regime Based Heat Transfer Correlation for R245fa in a 3 Mm Tube.” Ed. B. Weigand. International Journal of Heat and Mass Transfer  117: 1304–1311.
APA
Billiet, M., Ameel, B., Charnay, R., Revellin, R., & De Paepe, M. (2018). Flow regime based heat transfer correlation for R245fa in a 3 mm tube. (B. Weigand, Ed.)INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER  , 117, 1304–1311.
Vancouver
1.
Billiet M, Ameel B, Charnay R, Revellin R, De Paepe M. Flow regime based heat transfer correlation for R245fa in a 3 mm tube. Weigand B, editor. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER  . Elsevier BV; 2018;117:1304–11.
MLA
Billiet, Marijn, Bernd Ameel, Romain Charnay, et al. “Flow Regime Based Heat Transfer Correlation for R245fa in a 3 Mm Tube.” Ed. B. Weigand. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER  117 (2018): 1304–1311. Print.
@article{8536269,
  abstract     = {241 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 five mass fluxes (100, 300, 500, 700 and 1000 kg/(m2 s)), three heat fluxes (10, 30 and 50 kW/m2) and at three saturation temperatures (40 {\textdegree}C, 70 {\textdegree}C and 125 {\textdegree}C). The experiments were used to determine the influence of the saturation temperature, mass flux, heat flux, vapour quality and flow regime 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.
Due to the fact that most heat transfer models found in literature are developed for low saturation temperatures and one flow regime, the heat transfer coefficients predicted by the existing models do not comply very well with the experimental data. Thus, a new heat transfer correlation for R254fa was proposed. The new correlation has a Mean Absolute Error of 11.7\% for the experimental data of a tube with an inner tube diameter of 3 mm. Finally, this new correlation was also verified with R245fa datasets of other authors.},
  author       = {Billiet, Marijn and Ameel, Bernd and Charnay, Romain and Revellin, R{\'e}mi and De Paepe, Michel},
  editor       = {Weigand, B.},
  issn         = {0017-9310},
  journal      = {INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER                                    },
  keyword      = {two-phase,refrigerant,heat transfer measurement},
  language     = {eng},
  pages        = {1304--1311},
  publisher    = {Elsevier BV},
  title        = {Flow regime based heat transfer correlation for R245fa in a 3\unmatched{202f}mm tube},
  url          = {http://dx.doi.org/10.1016/j.ijheatmasstransfer.2017.10.062},
  volume       = {117},
  year         = {2018},
}

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