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Document IIF

Étude d'un système frigorifique au CO₂ et d'un stockage d'énergie thermique pour les navires de passagers.

Investigation of CO₂ refrigeration system and thermal energy storage for passenger ships.

Numéro : 0035

Auteurs : ANDERSEN H., SAEED M. Z., HAFNER A., GABRIELII C.

Résumé

As dominant synthetic refrigerants are increasingly regulated, natural refrigerants have been resurrected as working fluids. Like all other sectors, the cruise industry must adapt to reduce GHG emissions. More emphasis has been given to natural working fluids, such as water, ammonia, hydrocarbons, and carbon dioxide, than new synthetic refrigerants. Among the natural refrigerants, CO₂ refrigerant is the only non-toxic and non-flammable and offers compact units suited for cruise ships. Cruise ships utilise refrigeration systems for air-conditioning and to preserve provision. The performance of two CO₂ refrigeration systems employed for air conditioning and provision chilling and freezing aboard a medium-sized cruise ship is simulated. Furthermore, how cold thermal energy storage (CTES) can be utilised to supply the cooling demand of a two-hour port stay has been investigated. Three reference cases with different boundary conditions are defined and referred to as warm-, medium, and cold cases. Respectively for the cases, it has been found that the maximum cooling COP of an AC system is about 2.89, 4.19, and 5.99. Furthermore, for the provision system, it is 2.33, 2.98, and 3.54, respectively. Lastly, the CTES must contain 21163 kg of water as phase change material and a total volume of 38.0 m³.

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Pages : 8

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Détails

Titre original : Investigation of CO₂ refrigeration system and thermal energy storage for passenger ships.
Identifiant de la fiche : 30030994
Langues : Anglais
Sujet : Technologie
Source : 10^th IIR Conference on Ammonia and CO₂ Refrigeration Technologies.
Date d'édition : 27/04/2023
DOI : http://dx.doi.org/10.18462/iir.nh3-co2.2023.0035

Liens

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Indexation

Thèmes : Stockage d'énergie thermique;
Systèmes à éjection, cycle à air, cycle Stirling, autres cycles;
Efficacité energétique, économie d'énergie;
CO2
Mots-clés : Navire; R744; Cycle transcritique; Stockage d'énergie thermique; Éjecteur; Efficacité énergétique; COP; Conditionnement d'air; Réfrigeration; Congélation; Modélisation; Simulation; Performance