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Recommended by the IIR / IIR document

Innovative refrigeration concept for passenger ships - combining CO₂ refrigerant, cold recovery and cold storage.

Number: 0207

Author(s) : PARDIÑAS A. A., SELVNES H., GABRIELII C., SAEED M. Z.

Summary

More stringent international regulations on ship's emissions require a shift towards more climate friendly fuels, such as liquefied natural gas (LNG). On LNG-driven ships, the fuel is stored onboard at cryogenic temperature. The fuel must be vaporised before injected into the engine, implying a potential for cold recovery. Today, concepts are commercially available for utilising this surplus cold in conventional AC chiller system. This paper proposes an innovative concept where the LNG cold recovery system is integrated with a provision refrigeration system based on a CO₂ booster unit and a cold thermal storage (CTES) due to the dynamic nature of loads and cold-recovery availability. The CTES is based on phase change materials (PCM) which, together with the choice of CO₂ as refrigerant, ensures a compact system. The results show a potential for significant reduction in power consumption of the refrigeration systems and thereby contributing to reduced GHG emissions.

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Pages: 11 p.

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Details

Original title: Innovative refrigeration concept for passenger ships - combining CO₂ refrigerant, cold recovery and cold storage.
Record ID : 30029782
Languages: English
Subject: Technology
Source: 15^th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15^th 2022.
Publication date: 2022/06/13
DOI: http://dx.doi.org/10.18462/iir.gl2022.0207
Document available for consultation in the library of the IIR headquarters only.

Links

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See the conference proceedings

Indexing

Themes: LNG and LPG;
Thermal energy storage;
CO2;
Two-phase secondary refrigerants (PCMs, ice slurries…);
Marine transport;
Other energy-saving and energy-recovery systems
Keywords: Ship; CO2; R744; Recovery; Thermal energy storage; Case study; LNG; Simulation; Modelling