Performance Analysis of Cold Energy Recovery from CO 2 Injection in Ship-Based Carbon Capture and Storage (CCS)

Hwalong You, Youngkyun Seo, Cheol Huh and Daejun Chang
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Hwalong You: Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Korea
Youngkyun Seo: Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Korea
Cheol Huh: Ocean Science and Technology School, Korea Maritime & Ocean University, 727 Taejong-ro, Youngdo-gu, Busan 606-791, Korea
Daejun Chang: Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Korea

Energies, 2014, vol. 7, issue 11, 1-16

Abstract: Carbon capture and storage (CCS) technology is one of the practical solutions for mitigating the effects of global warming. When captured CO 2 is injected into storage sites, the CO 2 is subjected to a heating process. In a conventional CO 2 injection system, CO 2 cold energy is wasted during this heating process. This study proposes a new CO 2 injection system that takes advantage of the cold energy using the Rankine cycle. The study compared the conventional system with the new CO 2 injection system in terms of specific net power consumption, exergy efficiency, and life-cycle cost (LCC) to estimate the economic effects. The results showed that the new system reduced specific net power consumption and yielded higher exergy efficiency. The LCC of the new system was more economical. Several cases were examined corresponding to different conditions, specifically, discharge pressure and seawater temperature. This information may affect decision-making when CCS projects are implemented.

Keywords: carbon capture and storage; CO 2 injection; cold energy recovery; Rankine cycle; exergy efficiency; life-cycle cost (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2014
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