A Novel Design of Liquefied Natural Gas (LNG) Regasification Power Plant Integrated with Cryogenic Energy Storage System

Jinwoo Park, Inkyu Lee, il Moon

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Natural gas is transported in its liquid state over long distances and thus must be gasified before use. This study focused on the alternative use of cold energy in an LNG regasification power plant integrated with a cryogenic energy storage (LPCES) system that supports variation over time. Energy demands change over time; these dynamics must be considered to improve overall energy efficiency. During off-peak times, the LNG cold energy is stored in the cryogenic energy storage (CES) system. In contrast, during on-peak times, the stored cryogenic energy is released as electricity to meet higher energy demands. To evaluate the efficiency of the proposed LPCES system, the total power used in the CES system was optimized and a thermodynamic analysis was conducted. In addition, a case study was performed to investigate the effect of the LPCES system with respect to an hourly reserve margin. The results indicated a 95.2% round-trip efficiency for the proposed LPCES system, which is higher than the efficiencies (up to 75%) offered by existing bulk power management systems using hydropower and compressed air. (Figure Presented).

Original languageEnglish
Pages (from-to)1288-1296
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume56
Issue number5
DOIs
Publication statusPublished - 2017 Feb 8

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Liquefied natural gas
Power plants
Compressed air
Cryogenics
Energy efficiency
Natural gas
Electricity
Thermodynamics
Liquids
Cryogenic energy storage

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

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title = "A Novel Design of Liquefied Natural Gas (LNG) Regasification Power Plant Integrated with Cryogenic Energy Storage System",
abstract = "Natural gas is transported in its liquid state over long distances and thus must be gasified before use. This study focused on the alternative use of cold energy in an LNG regasification power plant integrated with a cryogenic energy storage (LPCES) system that supports variation over time. Energy demands change over time; these dynamics must be considered to improve overall energy efficiency. During off-peak times, the LNG cold energy is stored in the cryogenic energy storage (CES) system. In contrast, during on-peak times, the stored cryogenic energy is released as electricity to meet higher energy demands. To evaluate the efficiency of the proposed LPCES system, the total power used in the CES system was optimized and a thermodynamic analysis was conducted. In addition, a case study was performed to investigate the effect of the LPCES system with respect to an hourly reserve margin. The results indicated a 95.2{\%} round-trip efficiency for the proposed LPCES system, which is higher than the efficiencies (up to 75{\%}) offered by existing bulk power management systems using hydropower and compressed air. (Figure Presented).",
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A Novel Design of Liquefied Natural Gas (LNG) Regasification Power Plant Integrated with Cryogenic Energy Storage System. / Park, Jinwoo; Lee, Inkyu; Moon, il.

In: Industrial and Engineering Chemistry Research, Vol. 56, No. 5, 08.02.2017, p. 1288-1296.

Research output: Contribution to journalArticle

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