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Two-phase heat transfer measurements of R254fa at high saturation temperatures in horizontal mini-channels

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Abstract
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 50W/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 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.
Keywords
ORC, boiling, multiphase, refrigerant, flow boiling

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Chicago
Billiet, Marijn, Charnay Romain, Revellin Remi, Lenka Bokisova, and Michel De Paepe. 2016. “Two-phase Heat Transfer Measurements of R254fa at High Saturation Temperatures in Horizontal Mini-channels.” In 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics.
APA
Billiet, M., Romain, C., Remi, R., Bokisova, L., & De Paepe, M. (2016). Two-phase heat transfer measurements of R254fa at high saturation temperatures in horizontal mini-channels. 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. Presented at the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT 2016).
Vancouver
1.
Billiet M, Romain C, Remi R, Bokisova L, De Paepe M. Two-phase heat transfer measurements of R254fa at high saturation temperatures in horizontal mini-channels. 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. 2016.
MLA
Billiet, Marijn, Charnay Romain, Revellin Remi, et al. “Two-phase Heat Transfer Measurements of R254fa at High Saturation Temperatures in Horizontal Mini-channels.” 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. 2016. Print.
@inproceedings{8060019,
  abstract     = {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/(m{\texttwosuperior}.s)), three heat fluxes (10, 30 and 50W/m{\texttwosuperior}) 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 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.},
  author       = {Billiet, Marijn and Romain, Charnay and Remi, Revellin and Bokisova, Lenka and De Paepe, Michel},
  booktitle    = {12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics},
  isbn         = { 978-1-77592-124-0},
  language     = {eng},
  location     = {Malaga, Spain},
  title        = {Two-phase heat transfer measurements of R254fa at high saturation temperatures in horizontal mini-channels},
  year         = {2016},
}