Application of Cryogenic Energy Storage to Liquefied Natural Gas Regasification Power Plant

Jinwoo Park, Inkyu Lee, Hyungjoon Yoon, Jiyong Kim, Il Moon

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

A liquefied natural gas (LNG) must be regasified prior to use, and seawater is generally used as heat source. To meet natural gas demand, LNG is continually gasified and its cold energy is highly wasted. This research focuses on the applying LNG cold energy to cryogenic energy storage (CES) system. Moreover, an alternative use of LNG cold energy is proposed with an integration of CES system and LNG regasification power plant; called LNG regasification power plant integrated with cryogenic energy storage (LPCES) system. In the CES unit of proposed LPCES system, entire power consumption and generation are optimized to enhance its storage efficiency. Optimization model is developed mainly focused on compressors and turbines of CES unit. Additionally, a thermodynamic analysis is carried out to explain its cryogenic behavior. Furthermore, an hourly electricity demand and generation in Ontario are applied to evaluate the effect of LPCES system. As a result, a case of applied LPCES system indicated 21.4% minimum reserve margin, which represents electricity reserve over the capacity, compare to 17.7% of the base case. In addition, the result shows a round trip efficiency corresponding to 95.2% for the proposed LPCES system, which is a significantly improved value than efficiencies of developed bulk power management systems. In conclusion, we proposed a novel concept of energy storage system which has a substantial efficiency by LNG cold energy utilization.

Original languageEnglish
Title of host publicationComputer Aided Chemical Engineering
PublisherElsevier B.V.
Pages2557-2562
Number of pages6
DOIs
Publication statusPublished - 2017 Oct

Publication series

NameComputer Aided Chemical Engineering
Volume40
ISSN (Print)1570-7946

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Computer Science Applications

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    Park, J., Lee, I., Yoon, H., Kim, J., & Moon, I. (2017). Application of Cryogenic Energy Storage to Liquefied Natural Gas Regasification Power Plant. In Computer Aided Chemical Engineering (pp. 2557-2562). (Computer Aided Chemical Engineering; Vol. 40). Elsevier B.V.. https://doi.org/10.1016/B978-0-444-63965-3.50428-1