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Experimental investigation of the effect of solid-gas two-phase flow in CO2 cascade refrigeration system
- Source :
- Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
- Publication Year :
- 2020
- Publisher :
- Informa UK Limited, 2020.
-
Abstract
- 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
- Subjects :
- Solid gas
Materials science
Cascade refrigeration
Renewable Energy, Sustainability and the Environment
Triple point
020209 energy
Energy Engineering and Power Technology
Refrigeration
Thermodynamics
02 engineering and technology
Fuel Technology
020401 chemical engineering
Nuclear Energy and Engineering
Scientific method
0202 electrical engineering, electronic engineering, information engineering
Dry ice
Sublimation (phase transition)
Two-phase flow
0204 chemical engineering
Subjects
Details
- ISSN :
- 15567230 and 15567036
- Volume :
- 45
- Database :
- OpenAIRE
- Journal :
- Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
- Accession number :
- edsair.doi.dedup.....d79383b6e8e9dd5afd312970f0311d46