Experimental investigation of a new CO2 refrigeration system arrangement for supermarket applications

被引：3

作者：

Paez, Ana ^{[1
,2
,3
,4
]}

Ballot-Miguet, Benedicte ^{[4
]}

Michel, Benoit ^{[1
]}

Tobaly, Pascal ^{[2
,3
]}

Revellin, Remi ^{[1
]}

机构：

[1] Univ Lyon, INSA Lyon, CNRS, CETHIL,UMR5008, F-69621 Villeurbanne, France

[2] LaFSET Lab Froid Syst Energet & Therm, F-75003 Paris, France

[3] Univ Sorbonne Paris Nord, F-93430 Villetaneuse, France

[4] EDF R&D, F-77250 Ecuelles, France

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION | 2024年 / 162卷

关键词：

CO2 Refrigeration system; Internal heat exchanger; Reduced superheat; Energy efficiency and experimentation; INTERNAL HEAT-EXCHANGER; THERMODYNAMIC ANALYSIS; THEORETICAL EVALUATION; PARALLEL COMPRESSION; EXPANSION VALVE; 2-PHASE EJECTOR; MULTI-EJECTOR; CYCLE; PERFORMANCE; PLANT;

D O I：

10.1016/j.ijrefrig.2024.03.010

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A new position of an internal heat exchanger within the thermodynamic cycle is proposed to improve the performance of CO 2 refrigeration systems in warm climates, specifically in supermarket applications. The proposed configuration uses the saturated vapor from the liquid receiver to recover the heat that is rejected by a subcooler positioned after the gas cooler. This system results in a reduced evaporator superheat. This configuration is compared with a reference system. The experimental study is conducted on a CO 2 laboratory cooling system reproducing a commercial plant. The cooling capacity of the system is 30 kW. The water inlet temperature in the gas cooler (hot source) varies from 15 degrees C to 35 degrees C, while the mono -ethylene glycol outlet temperature of the evaporator (cold source) is fixed at -8 degrees C. The setup is validated through an energy balance. Using a subcooler in this new position improves the coefficient of performance by 10.2 % under transcritical conditions and 6.3 % under subcritical conditions when compared with the reference system.

引用

页码：245 / 256

页数：12

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