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Simulation study for transcritical R744 refrigeration system with ejector installed.
Number: pap. n. 1627
Author(s) : KANG G. H., NA S., KIM M. S.
Summary
The regulations on high global warming potential (GWP) refrigerants are being intensified in recent years. Thus, the researches with respect to alternative refrigerants are actively carried out. The R744 is representative natural refrigerant with low GWP, however, the pressure of R744 cycle is very high, and the coefficient of performance (COP) tends to be lower than conventional cycles. Therefore, in this study, experimental study for transcritical R744 refrigeration system with ejector installed is progressed. Ejector geometry and optimal operating conditions are provided to find an optimal COP. In addition to this, experiments are conducted at various conditions to investigate the optimal operating situation. The cycle shows the best performance when the ejector geometry and operating conditions are well matched. Performance of ejector is enhanced as the gas cooler pressure elevates. While the compressor work is also increases. Therefore, optimal operation conditions should be thoroughly determined.
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Details
- Original title: Simulation study for transcritical R744 refrigeration system with ejector installed.
- Record ID : 30026797
- Languages: English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Publication date: 2019/08/24
- DOI: http://dx.doi.org/10.18462/iir.icr.2019.1627
Links
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Indexing
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Themes:
CO2;
Ejector systems, air cycle, Stirling cycle, other cycles) - Keywords: Geometry; Density; R744; Simulation; Ejector; Transcritical cycle; COP; CO2
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