Enhancing the performance of a CO2 refrigeration system with the use of an absorption chiller

被引：37

作者：

Bellos, Evangelos ^{[1
]}

Tzivanidis, Christos ^{[1
]}

机构：

[1] Natl Tech Univ Athens, Thermal Dept, Sch Mech Engn, Heroon Polytech 9, Athens 15780, Greece

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2019年 / 108卷

关键词：

Absorption chiller; Subcooling; CO2; refrigeration; Transcritical CO2 cycle; R744; OPTIMUM HIGH-PRESSURE; CARBON-DIOXIDE; COMPRESSION REFRIGERATION; EXERGY ANALYSIS; SUPERMARKET REFRIGERATION; THERMOELECTRIC SUBCOOLER; THERMODYNAMIC ANALYSIS; CYCLE; ENERGY; OPTIMIZATION;

D O I：

10.1016/j.ijrefrig.2019.09.009

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The objective of this work is to examine a transcritical CO2 refrigeration system coupled to a single-effect absorption chiller. The role of the absorption machine is to create a subcooling after the gas-cooler in order to increase the COP. The absorption system is fed by waste heat after the CO2 compressor and so there is not any need for any external energy source. The analysis is conducted with a validated numerical model which is developed in Engineering Equation Solver. The system is studied and optimized for different heat rejection temperatures from 35 degrees C up to 50 degrees C and for different refrigeration temperatures from -35 degrees C up to 50 degrees C. It is found that there is COP enhancement in all the operating scenarios and especially in the cases with higher heat-rejection temperature and lower refrigeration temperature. The mean COP enhancement is about 23.4% which is an important enhancement for designing more efficient systems. (C) 2019 Elsevier Ltd and IIR. All rights reserved.

引用

页码：37 / 52

页数：16

共 48 条

[1] Energy and exergy analysis of a combined transcritical CO2 compression refrigeration and single effect H2O-LiBr vapour absorption system [J].

Arora, Akhilesh ;

Singh, Nikhil Kumar ;

Monga, Saksham ;

Kumar, Omesh .

INTERNATIONAL JOURNAL OF EXERGY, 2011, 9 (04) :453-471

[2] Improvements in the cooling capacity and the COP of a transcritical CO2 refrigeration plant operating with a thermoelectric subcooling system [J].

Astrain, D. ;

Merino, A. ;

Catalan, L. ;

Aranguren, P. ;

Araiz, M. ;

Sanchez, D. ;

Cabello, R. ;

Llopis, R. .

APPLIED THERMAL ENGINEERING, 2019, 155 :110-122

[3] A comparative study of CO2 refrigeration systems [J].

Bellos, Evangelos ;

Tzivanidis, Christos .

ENERGY CONVERSION AND MANAGEMENT-X, 2019, 1

[4] CO2 Transcritical Refrigeration Cycle with Dedicated Subcooling: Mechanical Compression vs. Absorption Chiller [J].

Bellos, Evangelos ;

Tzivanidis, Christos .

APPLIED SCIENCES-BASEL, 2019, 9 (08)

[5] A Theoretical Comparative Study of CO2 Cascade Refrigeration Systems [J].

Bellos, Evangelos ;

Tzivanidis, Christos .

APPLIED SCIENCES-BASEL, 2019, 9 (04)

[6] Investigation of a novel solar-driven refrigeration system with ejector [J].

Bellos, Evangelos ;

Theodosiou, Ioannis-Christos ;

Vellios, Loukas ;

Tzivanidis, Christos .

THERMAL SCIENCE AND ENGINEERING PROGRESS, 2018, 8 :284-295

[7] Multi-objective optimization of a solar driven trigeneration system [J].

Bellos, Evangelos ;

Tzivanidis, Christos .

ENERGY, 2018, 149 :47-62

[8] Thermodynamic investigation of LiCl-H2O working pair in a double effect absorption chiller driven by parabolic trough collectors [J].

Bellos, Evangelos ;

Tzivanidis, Christos ;

Pavlovic, Sasa ;

Stefanovic, Velimir .

THERMAL SCIENCE AND ENGINEERING PROGRESS, 2017, 3 :75-87

[9] Parametric analysis and optimization of a solar driven trigeneration system based on ORC and absorption heat pump [J].

Bellos, Evangelos ;

Tzivanidis, Christos .

JOURNAL OF CLEANER PRODUCTION, 2017, 161 :493-509

[10]

Brown JS, 2002, INT J REFRIG, V25, P19

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