TY - JOUR
T1 - Self-recuperative liquid air energy storage system
T2 - A new sustainable approach for uninterrupted power supply
AU - Riaz, Amjad
AU - Qyyum, Muhammad Abdul
AU - Naquash, Ahmad
AU - Lee, Moonyong
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/9/1
Y1 - 2023/9/1
N2 - Liquid air energy storage (LAES) system is an emerging but promising candidate solution to the intermittency and weather/climate dependability issues of renewable energy. It is also envisioned as an energy vector for its multi-faceted potential applications, especially in the energy supply chain systems, and its ability to satisfy off-terrain demands. During low energy demand, the air is liquefied and later regasified to generate electricity when needed. However, the low round-trip efficiency of the conventional approaches (∼50%) is a challenge. The present study proposes a novel self-recuperative process whereby stored liquid air is used as a refrigerant instead of external mechanisms. Four slightly modifying configurations have been studied; the best case recuperates with the cold box and the compression heat during the discharging half cycle before power recovery. The case studies are simulated using Aspen HYSYS®. This excellent integration results in a round-trip efficiency of 75.8% and a specific energy consumption of 0.071 kWh/kgLA. The proposed process consumes 39.8 MW power, 58% less than the base case, resulting in 0.10 $/ton of levelized cost (production). The scheme opens up multiple pathways for liquid air, from further integration opportunities to its service in a continuous power generation mode as a transport medium and energy source in remote/off-grid locations. However, a dynamic and control strategy study should be conducted.
AB - Liquid air energy storage (LAES) system is an emerging but promising candidate solution to the intermittency and weather/climate dependability issues of renewable energy. It is also envisioned as an energy vector for its multi-faceted potential applications, especially in the energy supply chain systems, and its ability to satisfy off-terrain demands. During low energy demand, the air is liquefied and later regasified to generate electricity when needed. However, the low round-trip efficiency of the conventional approaches (∼50%) is a challenge. The present study proposes a novel self-recuperative process whereby stored liquid air is used as a refrigerant instead of external mechanisms. Four slightly modifying configurations have been studied; the best case recuperates with the cold box and the compression heat during the discharging half cycle before power recovery. The case studies are simulated using Aspen HYSYS®. This excellent integration results in a round-trip efficiency of 75.8% and a specific energy consumption of 0.071 kWh/kgLA. The proposed process consumes 39.8 MW power, 58% less than the base case, resulting in 0.10 $/ton of levelized cost (production). The scheme opens up multiple pathways for liquid air, from further integration opportunities to its service in a continuous power generation mode as a transport medium and energy source in remote/off-grid locations. However, a dynamic and control strategy study should be conducted.
KW - Composite curves
KW - Energy efficiency
KW - Energy storage system
KW - Liquid air
KW - Optimization
KW - Self-recuperative
UR - http://www.scopus.com/inward/record.url?scp=85164493832&partnerID=8YFLogxK
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UR - https://www.mendeley.com/catalogue/80ee92ea-33ea-37e1-82fa-1b02e4599be0/
U2 - 10.1016/j.applthermaleng.2023.120983
DO - 10.1016/j.applthermaleng.2023.120983
M3 - Article
AN - SCOPUS:85164493832
SN - 1359-4311
VL - 232
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
M1 - 120983
ER -