Abstract

In this paper, the transcritical CO2 refrigeration system with ejector is applied to a commercial ultra-cold cabinet. The influence of the key operating parameters of the ejector on the system performance is analyzed, and the measurement method of the experimental parameters is proposed. The results show that the ejector can eject the low pressure refrigerant into the reservoir by using the energy of the large pressure difference throttle, and the COP of the system can be increased by 9%-19%. This paper provides a theoretical basis for the design, development and optimization of CO2 refrigeration and air conditioning system with ejector.

Highlights

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  • Measurement of energy consumption of commercial refrigeration systemWLPH HOHFWULF SRZHU DQG WRWDO HOHFWULF HQHUJ\ FRQVXPSWLRQ RI HDFK HOHFWULF SDUW RI WKH UHIULJHUDWLRQ V\VWHP VXFK DV FRPSUHVVRU FRQGHQVHU DQG FDELQHW IDQ DUH PHDVXUHG VHSDUDWHO\ 'DWD ZHUH FROOHFWHG FRQWLQXRXVO\ IRU PRUH WKDQ K $FFRUGLQJ WR WKH RSHUDWLQJ SRZHU RI HDFK SDUW DQG WKH SDUDPHWHUV VXFK DV IORZ UDWH DQG SUHVVXUH WKH RSHUDWLQJ FRQGLWLRQ DQG VWDWH RI WKH V\VWHP DUH FRPSUHKHQVLYHO\ DQDO\]HG %\ VSHFLI\LQJ WKH SRZHU VXSSO\ DQG GLVWULEXWLRQ RI HDFK LQGLYLGXDO GHYLFH WKH PHDVXUHPHQW VHTXHQFH RI HDFK SDUW LV DUUDQJHG

  • Measurement of integrated efficiency of refrigeration system$IWHU WKH FRPSOHWLRQ RI D UHIULJHUDWLRQ V\VWHP WHVW WKH WHVW GDWD VKRXOG EH DQDO\]HG DQG SURFHVVHG LQ WLPH WR FDOFXODWH WKH &23 RI WKH UHIULJHUDWLRQ V\VWHP 7KHQ WKH FRPSUHKHQVLYH HYDOXDWLRQ RI WKH ZKROH UHIULJHUDWLRQ V\VWHP LV JLYHQ E\ FRQVLGHULQJ WKH H[WHUQDO HQYLURQPHQW WKH LQIOXHQFH RI FXVWRPHU DFWLYLWLHV WKH UHSOHQLVKPHQW WLPH WKH FRROLQJ ORDG RI WKH JRRGV DQG RWKHU IDFWRUV

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Summary

The experimental method

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Measurement of energy consumption of commercial refrigeration system
Measurement of integrated efficiency of refrigeration system
Temperature data processing
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