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Experimental investigation of the effect of solid-gas two-phase flow in CO2 cascade refrigeration system

Experimental investigation of the effect of solid-gas two-phase flow in CO2 cascade refrigeration system

Kategori
Vitenskapelig artikkel
Sammendrag
The dry ice sublimation process of CO2 is a unique technique in which temperature ranges below the triple point of −56 °C can be achieved in a CO2 refrigeration system. However, during the evaporation process of the actual refrigeration system, the dry-ice blockage maybe happens in the evaporator, which causes a risk of system failure in the suction of the compressor. In order to overcome this problem, in this study, an ultra-low temperature CO2 cascade refrigeration system with a novel tapered evaporator/sublimator was designed and constructed. The novel evaporator/sublimator included a swirl promoter, which induces the swirling flow of solid-gas two-phase flow. Experiments were conducted for the investigation of solid-gas two-phase flow heat transfer characteristics in the evaporator/sublimator. According to the experimental results, it is verified that the CO2 refrigeration system can operate consistently and steadily without dry ice blockage in the evaporator/sublimator. In addition, the dry ice particles are uniformly distributed along the inner wall of the evaporator/sublimator by the installation of the swirl promoter, and the heat transfer coefficient is considerably improved. © 2020, © 2020 Taylor & Francis Group, LLC
Oppdragsgiver
  • Research Council of Norway (RCN) / 257632
Språk
Engelsk
Forfatter(e)
  • Haruhiko Yamasaki
  • Hiroshi Yamaguchi
  • Ônder Kizilkan
  • Takeshi Kamimura
  • Kazuhiro Hattori
  • Petter Nekså
Institusjon(er)
  • Osaka Furitsu Daigaku
  • Doshisha Daigaku
  • Tyrkia
  • Japan
  • SINTEF Energi AS / Gassteknologi
År
2020
Publisert i
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
ISSN
1556-7036