Abstract
Recovering the remaining cold energy from the regasification process is one of the key challenges of the overall LNG value chain. This paper aims to develop a cryogenic energy storage system (CES) integrated with LNG direct expansion regasification (LNG–CES) that can recover cold energy and store it as cryogenic energy using air as the working fluid. Cold energy of LNG is available in two forms: thermal energy by heat exchange and shaft work by expansion, while the cryogenic storage process requires compression and cooling. The supply and demand of LNG direct expansion and cryogenic energy storage processes are well balanced. Therefore, a combined LNG–CES process to store energy will prove efficient. This study proposes an industrial-feasible design for the LNG–CES process and energy optimization to maximize net power output from the process. Moreover, a novel process design is proposed to recover cold energy lost during LNG regasification more efficiently. Energy optimization results of the proposed design demonstrated an 11.04% increase in the net power generation from the feasible configuration of the base design. Additionally, the cause of this improvement was studied using thermodynamic analyses.
| Original language | English |
|---|---|
| Pages (from-to) | 691-705 |
| Number of pages | 15 |
| Journal | Energy |
| Volume | 173 |
| DOIs | |
| Publication status | Published - 2019 Apr 15 |
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All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Building and Construction
- Pollution
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering
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A novel cryogenic energy storage system with LNG direct expansion regasification : Design, energy optimization, and exergy analysis. / Lee, Inkyu; Park, Jinwoo; You, Fengqi; Moon, Il.
In: Energy, Vol. 173, 15.04.2019, p. 691-705.Research output: Contribution to journal › Article
TY - JOUR
T1 - A novel cryogenic energy storage system with LNG direct expansion regasification
T2 - Design, energy optimization, and exergy analysis
AU - Lee, Inkyu
AU - Park, Jinwoo
AU - You, Fengqi
AU - Moon, Il
PY - 2019/4/15
Y1 - 2019/4/15
N2 - Recovering the remaining cold energy from the regasification process is one of the key challenges of the overall LNG value chain. This paper aims to develop a cryogenic energy storage system (CES) integrated with LNG direct expansion regasification (LNG–CES) that can recover cold energy and store it as cryogenic energy using air as the working fluid. Cold energy of LNG is available in two forms: thermal energy by heat exchange and shaft work by expansion, while the cryogenic storage process requires compression and cooling. The supply and demand of LNG direct expansion and cryogenic energy storage processes are well balanced. Therefore, a combined LNG–CES process to store energy will prove efficient. This study proposes an industrial-feasible design for the LNG–CES process and energy optimization to maximize net power output from the process. Moreover, a novel process design is proposed to recover cold energy lost during LNG regasification more efficiently. Energy optimization results of the proposed design demonstrated an 11.04% increase in the net power generation from the feasible configuration of the base design. Additionally, the cause of this improvement was studied using thermodynamic analyses.
AB - Recovering the remaining cold energy from the regasification process is one of the key challenges of the overall LNG value chain. This paper aims to develop a cryogenic energy storage system (CES) integrated with LNG direct expansion regasification (LNG–CES) that can recover cold energy and store it as cryogenic energy using air as the working fluid. Cold energy of LNG is available in two forms: thermal energy by heat exchange and shaft work by expansion, while the cryogenic storage process requires compression and cooling. The supply and demand of LNG direct expansion and cryogenic energy storage processes are well balanced. Therefore, a combined LNG–CES process to store energy will prove efficient. This study proposes an industrial-feasible design for the LNG–CES process and energy optimization to maximize net power output from the process. Moreover, a novel process design is proposed to recover cold energy lost during LNG regasification more efficiently. Energy optimization results of the proposed design demonstrated an 11.04% increase in the net power generation from the feasible configuration of the base design. Additionally, the cause of this improvement was studied using thermodynamic analyses.
UR - http://www.scopus.com/inward/record.url?scp=85062295075&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85062295075&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2019.02.047
DO - 10.1016/j.energy.2019.02.047
M3 - Article
AN - SCOPUS:85062295075
VL - 173
SP - 691
EP - 705
JO - Energy
JF - Energy
SN - 0360-5442
ER -