Performance Analysis of Cold Energy Recovery from CO2 Injection in Ship-Based Carbon Capture and Storage (CCS)

Energies

Hwalong You¹  Youngkyun Seo¹  Cheol Huh²  Daejun Chang¹ 

[1] Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Korea; E-Mails:;Ocean Science and Technology School, Korea Maritime & Ocean University, 727 Taejong-ro, Youngdo-gu, Busan 606-791, Korea; E-Mail:

关键词: carbon capture and storage;    CO₂ injection;    cold energy recovery;    Rankine cycle;    exergy efficiency;    life-cycle cost;   

DOI  :  10.3390/en7117266

来源: mdpi

【 摘 要 】

Carbon capture and storage (CCS) technology is one of the practical solutions for mitigating the effects of global warming. When captured CO₂ is injected into storage sites, the CO₂ is subjected to a heating process. In a conventional CO₂ injection system, CO₂ cold energy is wasted during this heating process. This study proposes a new CO₂ injection system that takes advantage of the cold energy using the Rankine cycle. The study compared the conventional system with the new CO₂ 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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.