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Experimental investigation on the performance of the transcritical CO2 two-phase ejector refrigeration cycle.

[In Chinese. / En chinois.]

Author(s) : LI Q., GUO X., LI W., et al.

Type of article: Article

Summary

Experimental studies on the transcritical CO2 two-phase ejector refrigeration cycle were carried out, and the effects of the working conditions and the geometric parameters of the ejector on the performance of the system were analyzed. The experiment results indicate that the COP and cooling capacity of the system increase with the rise of the cooling pressure, while decrease with the increase in the outlet temperature of the gas cooler. For the systems using different nozzle opening diameters, the COP of the system using the larger nozzle opening diameter is larger than that using the smaller one under the same condition. For systems using different ejector mixing-chamber diameters, with the increase in the cooling pressure, the COP of the system using the smaller mixing-chamber diameter varies greatly, and is lower than that of the system using the larger one under the lower-cooling pressure condition. While under higher cooling-pressure condition, the performance of system using smaller diameter of the mixing chamber is better. The COP of the transcritical CO2 refrigeration cycle with a two-phase ejector is increased by 14% comparing to the traditional cycle at the same condition.

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Pages: 15-19

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