Advanced exergy analyses of an ejector expansion transcritical CO2 refrigeration system

Release Time:2025-04-30  Hits:

• Date:2025-04-30
• Title of Paper:Advanced exergy analyses of an ejector expansion transcritical CO2 refrigeration system
• Journal:Energy Conversion and Management
• Summary:This paper presents a thermodynamic investigation on an ejector expansion transcritical CO2 refrigeration
  system with advanced exergy analysis. By splitting the exergy destruction into endogenous/exogenous
  and unavoidable/avoidable parts, more valuable information of the interactions among the system
  components and the components improvement potential is provided. The results indicate that the compressor
  with largest avoidable endogenous exergy destruction possesses the highest priority of improvement,
  followed by the ejector, evaporator and gas cooler. The system exergy destruction is dominantly
  endogenous, and 43.44% of the total exergy destruction can be avoided by improving the system components.
  The evaporator has a serious impact on the exogenous exergy destruction within the compressor
  and ejector, and its own exergy destruction is entirely belongs to endogenous part. The effects of the discharge
  pressure, compressor efficiency and ejector efficiency on the system exergetic performance are
  discussed. There is an optimal discharge pressure with respect to the minimum endogenous exergy
  destruction in the compressor. Avoidable endogenous exergy destruction rates of the compressor and
  ejector are respectively reduced by 93.6% and 81.7% when the corresponding component efficiency varies
  from 0.5 to 0.9.
• Co-author:Tao Bai, Jianlin. Yu*, Gang. Yan.
• Volume:126
• Page Number:850-861
• Translation or Not:No
• Date of Publication:2016-08-28