TY - JOUR
T1 - Thermodynamic and economic analyses of the integrated cryogenic energy storage and gas power plant system
AU - Wen, Na
AU - Tan, Hongbo
AU - Pedersen, Simon
AU - Yang, Zhenyu
AU - Qin, Xiaoqiao
PY - 2023
Y1 - 2023
N2 - Liquid air energy storage (LAES) can be used to match power generation and demand for large-scale renewable energy systems. A new LAES system combining gas power plants, liquified natural gas cold recovery system, and carbon dioxide capture and storage (CCS) was proposed to improve system efficiency, store surplus renewable energy, and reduce greenhouse gas emissions. The thermodynamic and economic analyses of the proposed system were conducted, and the effects of charging pressure, energy storage pressure, discharging pressure, and CCS pressure on system efficiency were investigated. Furthermore, a genetic algorithm optimization model was built. The results showed that the global optimal round-trip efficiency is 54.77%, 3.49% improvement compared to the initial case. In addition, both split air ratio and combustion temperature influence the system thermodynamic and economic performance significantly. It is concluded that the tremendous economic feasibility with a dynamic payback period is in the range of 6.39–6.58 years and a levelized cost of energy is in the range of 0.050–0.051 USD/kWh when the split air ratio in conversion reactor is 0.4, and the combustion temperature is 1148–1248 °C, where round-trip efficiency of the system is 52.07%–53.39% and the designed maximum power generation capacity is 201.12 MW/1.61 GWh. The proposed system is technically and economically feasible and can be a new idea for further industrial applications of large-scale renewable energy storage and utilization.
AB - Liquid air energy storage (LAES) can be used to match power generation and demand for large-scale renewable energy systems. A new LAES system combining gas power plants, liquified natural gas cold recovery system, and carbon dioxide capture and storage (CCS) was proposed to improve system efficiency, store surplus renewable energy, and reduce greenhouse gas emissions. The thermodynamic and economic analyses of the proposed system were conducted, and the effects of charging pressure, energy storage pressure, discharging pressure, and CCS pressure on system efficiency were investigated. Furthermore, a genetic algorithm optimization model was built. The results showed that the global optimal round-trip efficiency is 54.77%, 3.49% improvement compared to the initial case. In addition, both split air ratio and combustion temperature influence the system thermodynamic and economic performance significantly. It is concluded that the tremendous economic feasibility with a dynamic payback period is in the range of 6.39–6.58 years and a levelized cost of energy is in the range of 0.050–0.051 USD/kWh when the split air ratio in conversion reactor is 0.4, and the combustion temperature is 1148–1248 °C, where round-trip efficiency of the system is 52.07%–53.39% and the designed maximum power generation capacity is 201.12 MW/1.61 GWh. The proposed system is technically and economically feasible and can be a new idea for further industrial applications of large-scale renewable energy storage and utilization.
KW - Cryogenic carbon dioxide capture and storage
KW - Gas power plants
KW - Liquid air energy storage
KW - Liquified natural gas cold energy utilization
KW - Thermodynamic and economic analyses
UR - http://www.scopus.com/inward/record.url?scp=85171369395&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2023.119301
DO - 10.1016/j.renene.2023.119301
M3 - Journal article
SN - 0960-1481
VL - 218
JO - Renewable Energy
JF - Renewable Energy
M1 - 119301
ER -
