Article (Scientific journals)
An annual energetic evaluation of booster and parallel refrigeration systems with R744 in food retail supermarkets. A Chilean perspective
Sacasas, Daniel; Vega Benavente, Javier Ignacio; Cuevas, Cristian
2022In International Journal of Refrigeration, 133, p. 326-336
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Keywords :
Transcritical CO2 unit; Gas-cooler/Condenser; Annual Simulation
Abstract :
[en] In the supermarket refrigeration industry, the natural refrigerant R744 (CO2) has been designated as a long-term solution to mitigate HFC refrigerants' global warming. In this study, booster (BB) and parallel compression (BP) configurations were assessed through a detailed and novel energetic modelling, which includes a semi-empirical "four-parameter" for reciprocating and scroll compressor models and a one-zone model for the gas cooler, and a three zones model for the condenser. Model validation showed a mean deviation of 4.23% against reference values. The COP of the BP configuration was 14% higher than BB, for ambient temperatures between 0°C and 35°C. This study presents for the first time, the simulation of transcritical systems with R744 throughout out different locations in Chile. Simulation results of fourteen Chilean cities showed that the BP system allows reducing the annual energy consumption between 4% for very cold climates and 12% for desert regions. An economic analysis revealed that only in most desert and warm climates (Arica, Antofagasta and Santiago), the differential capital expenditures of the BP system over the BB were recovered within 20 years with the operational expenditure savings. For the rest of the evaluated cities, the BB system is a more profitable solution than BP. The study aims to support the introduction of refrigeration system with R744 in Chilean supermarkets.
Disciplines :
Energy
Author, co-author :
Sacasas, Daniel;  Universidad de Concepción > Departamento de Ingeniería Mecánica, Fcultad de Ingeniería
Vega Benavente, Javier Ignacio  ;  Université de Liège - ULiège > A&M
Cuevas, Cristian;  Universidad de Concepción > Departamento de Ingeniería Mecánica, Facultad de Ingeniería
Language :
English
Title :
An annual energetic evaluation of booster and parallel refrigeration systems with R744 in food retail supermarkets. A Chilean perspective
Publication date :
January 2022
Journal title :
International Journal of Refrigeration
ISSN :
0140-7007
Publisher :
Elsevier, Netherlands
Volume :
133
Pages :
326-336
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Chilean National Agency of Research and Development (ANID) / Scholarship Program/ Doctorado Nacional / 21190490
Available on ORBi :
since 03 December 2021

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