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Comparisons of different ionic liquids combined with trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) as absorption working fluids.

Author(s) : WU W., YOU T., ZHANG H., et al.

Type of article: Article, IJR article

Summary

To overcome the shortcomings of conventional absorption working fluids, the novel trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) and ionic liquid (IL) are studied. The R1234ze(E)/IL properties and different absorption cycles are modeled with verified accuracy. The energy and exergy performance are comparatively investigated for four different ILs, 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF4]), 1-hexyl-3-methylimidazolium tetrafluoroborate([hmim][BF4]), 1-octyl-3-methylimidazolium tetrafluoroborate([omim][BF4]) and 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide([hmim][Tf2N]). Under an evaporation temperature of 5 °C, the minimum generation temperature is 44 °C, and the maximum coefficient of performance (COP) is respectively 0.264, 0.390, 0.398 and 0.431 for different ILs. Under a generation temperature of 90 °C, the minimum evaporation temperature is -22 °C, with maximum COP of 0.438, 0.556, 0.580 and 0.606. [emim][BF4] always has the lowest COP and exergy COP, while [hmim][Tf2N] has the highest values under most conditions. The main objectives are contributing novel potential working pairs, improving the efficiency of R1234ze(E)/ILs, as well as selecting the best-performing R1234ze(E)/IL mixture and offering directions for future improvement.

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Pages: 45-57

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Details

  • Original title: Comparisons of different ionic liquids combined with trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) as absorption working fluids.
  • Record ID : 30023491
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 88
  • Publication date: 2018/04
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2017.12.011

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