Integrating Cold Thermal Energy Storage for Air Conditioning Demand in a CO<sub>2</sub> Refrigeration System at a Supermarket
A common configuration for transcritical CO<sub>2</sub> booster systems in supermarkets involves air conditioning (AC) supplied by cooling a water-glycol circuit. The design capacity of the refrigeration unit must handle all refrigeration loads and the AC load during the hottest summer d...
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MDPI AG
2024-11-01
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| Online Access: | https://www.mdpi.com/1996-1073/17/23/5923 |
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| author | Davide Tommasini Håkon Selvnes Armin Hafner |
| author_facet | Davide Tommasini Håkon Selvnes Armin Hafner |
| author_sort | Davide Tommasini |
| collection | DOAJ |
| description | A common configuration for transcritical CO<sub>2</sub> booster systems in supermarkets involves air conditioning (AC) supplied by cooling a water-glycol circuit. The design capacity of the refrigeration unit must handle all refrigeration loads and the AC load during the hottest summer day, leading to overcapacity and part-load operation for most of the year. A proposed design for implementing cold thermal energy storage (CTES) dedicated to AC demand in a supermarket located in the Oslo region is modeled in the object-oriented language Modelica. Simulation results demonstrate an electricity peak power reduction of up to 32.33%. Even though energy savings are not the primary objective of this project, they are achieved by producing and storing energy when the outdoor temperature is lower, and the coefficient of performance (COP) of the system is higher. The energy savings can reach up to 11.8%. Finally, the economic benefits of the system are assessed under the spot pricing system, revealing potential electricity cost savings of up to 12.56%. |
| format | Article |
| id | doaj-art-4e0f03d295a74aeaaafe669646b91591 |
| institution | OA Journals |
| issn | 1996-1073 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-4e0f03d295a74aeaaafe669646b915912025-08-20T01:55:41ZengMDPI AGEnergies1996-10732024-11-011723592310.3390/en17235923Integrating Cold Thermal Energy Storage for Air Conditioning Demand in a CO<sub>2</sub> Refrigeration System at a SupermarketDavide Tommasini0Håkon Selvnes1Armin Hafner2Department of Thermal Energy, SINTEF Energy Research, 7034 Trondheim, NorwayCartesian AS, 7031 Trondheim, NorwayDepartment of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, NorwayA common configuration for transcritical CO<sub>2</sub> booster systems in supermarkets involves air conditioning (AC) supplied by cooling a water-glycol circuit. The design capacity of the refrigeration unit must handle all refrigeration loads and the AC load during the hottest summer day, leading to overcapacity and part-load operation for most of the year. A proposed design for implementing cold thermal energy storage (CTES) dedicated to AC demand in a supermarket located in the Oslo region is modeled in the object-oriented language Modelica. Simulation results demonstrate an electricity peak power reduction of up to 32.33%. Even though energy savings are not the primary objective of this project, they are achieved by producing and storing energy when the outdoor temperature is lower, and the coefficient of performance (COP) of the system is higher. The energy savings can reach up to 11.8%. Finally, the economic benefits of the system are assessed under the spot pricing system, revealing potential electricity cost savings of up to 12.56%.https://www.mdpi.com/1996-1073/17/23/5923thermal energy storagesupermarket refrigerationcarbon dioxideair conditioning |
| spellingShingle | Davide Tommasini Håkon Selvnes Armin Hafner Integrating Cold Thermal Energy Storage for Air Conditioning Demand in a CO<sub>2</sub> Refrigeration System at a Supermarket Energies thermal energy storage supermarket refrigeration carbon dioxide air conditioning |
| title | Integrating Cold Thermal Energy Storage for Air Conditioning Demand in a CO<sub>2</sub> Refrigeration System at a Supermarket |
| title_full | Integrating Cold Thermal Energy Storage for Air Conditioning Demand in a CO<sub>2</sub> Refrigeration System at a Supermarket |
| title_fullStr | Integrating Cold Thermal Energy Storage for Air Conditioning Demand in a CO<sub>2</sub> Refrigeration System at a Supermarket |
| title_full_unstemmed | Integrating Cold Thermal Energy Storage for Air Conditioning Demand in a CO<sub>2</sub> Refrigeration System at a Supermarket |
| title_short | Integrating Cold Thermal Energy Storage for Air Conditioning Demand in a CO<sub>2</sub> Refrigeration System at a Supermarket |
| title_sort | integrating cold thermal energy storage for air conditioning demand in a co sub 2 sub refrigeration system at a supermarket |
| topic | thermal energy storage supermarket refrigeration carbon dioxide air conditioning |
| url | https://www.mdpi.com/1996-1073/17/23/5923 |
| work_keys_str_mv | AT davidetommasini integratingcoldthermalenergystorageforairconditioningdemandinacosub2subrefrigerationsystematasupermarket AT hakonselvnes integratingcoldthermalenergystorageforairconditioningdemandinacosub2subrefrigerationsystematasupermarket AT arminhafner integratingcoldthermalenergystorageforairconditioningdemandinacosub2subrefrigerationsystematasupermarket |