Thermodynamic analysis of a new dual evaporator CO2 transcritical refrigeration cycle

In this work, a new dual-evaporator CO transcritical refrigeration cycle with two ejectors is proposed. In this new system, we proposed to recover the lost energy of condensation coming off the gas cooler and operate the refrigeration cycle ejector free and enhance the system performance and obtain...

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Bibliographic Details
Published in:Archives of thermodynamics 2017-03, Vol.38 (1), p.39-62
Main Authors: Abdellaoui, Ezzaalouni Yathreb, Kairouani, Lakdar Kairouani
Format: Article
Language:English
Subjects:
Carbon dioxide
Carbon monoxide
CO2
Compressing
Condensation
Ejection
Ejector
Ejectors
Energy
Evaporation
Exergy
Parameter modification
Pumps
Refrigeration
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Summary:In this work, a new dual-evaporator CO transcritical refrigeration cycle with two ejectors is proposed. In this new system, we proposed to recover the lost energy of condensation coming off the gas cooler and operate the refrigeration cycle ejector free and enhance the system performance and obtain dual-temperature refrigeration simultaneously. The effects of some key parameters on the thermodynamic performance of the modified cycle are theoretically investigated based on energetic and exergetic analysis. The simulation results for the modified cycle indicate more effective system performance improvement than the single ejector in the CO vapor compression cycle using ejector as an expander ranging up to 46%. The exergetic analysis for this system is made. The performance characteristics of the proposed cycle show its promise in dual-evaporator refrigeration system.
ISSN:2083-6023
1231-0956
2083-6023
DOI:10.1515/aoter-2017-0003