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Experimental and numerical investigation of the two-phase ejector capacity control using sub-cooling method. 

Number: 1162

Author(s) : HAIDA M., SICCO E., BAJCER M., BODYS J., ÖZYILDIZ T., SÁNCHEZ D., ARANGUREN P., SMOLKA J.

Summary

The ejector technology is one of the most promising solutions in vapour compression units, especially for natural refrigerant-based systems, i.e., the CO2 refrigeration and mobile air-conditioning systems, due to the expansion work recovery, which extends the application of such systems. Nevertheless, the design of the two-phase ejector required complex capacity control, e.g., using several ejectors operated in single or parallel modes, a needle in the converging-diverging motive nozzle, or the oscillator source. Therefore, the main aim
of this paper is to evaluate the possible control of the two-phase ejector operation by implementing the thermoelectric sub-cooler (TESC). The numerical investigation was done using the validated mathematical model of the two-phase ejector equipped with TESC at different gas cooler outlet temperatures ranging from 35.0 °C to 45.0 °C, determining different climate zones. Based on the results, the use of TESC allowed a capacity increment of over 50% by controlling the voltage of TESC within 12.0 V DC.

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Details

  • Original title: Experimental and numerical investigation of the two-phase ejector capacity control using sub-cooling method. 
  • Record ID : 30034194
  • Languages: English
  • Subject: Technology
  • Source: 1st IIR International Conference on Refrigeration Adapting to Rising Temperatures
  • Publication date: 2025/08
  • DOI: http://dx.doi.org/10.18462/iir.adaptation.2024.1162

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