期刊
ENERGY CONVERSION AND MANAGEMENT
卷 127, 期 -, 页码 149-159出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2016.08.096
关键词
Subsurface energy storage; Compressed CO2 energy storage system; Utilization of CO2; Two saline aquifers reservoirs; Thermodynamic analysis; Parametric analysis
资金
- National Nature Science Fund of China [51276059]
- Fundamental Research Funds for the Central Universities of China [2014XS27]
- China Scholarship Council (China) [1510200035]
- Lawrence Berkeley National Laboratory by the U.S. Department of Energy (United States) [DE-AC02-05CH11231]
Compressed air energy storage (CAES) is one of the leading large-scale energy storage technologies. However, low thermal efficiency and low energy storage density restrict its application. To improve the energy storage density, we propose a two-reservoir compressed CO2 energy storage system. We present here thermodynamic and parametric analyses of the performance of an idealized two-reservoir CO2 energy storage system under supercritical and transcritical conditions using a steady-state mathematical model. Results show that the transcritical compressed CO2 energy storage system has higher round-trip efficiency and exergy efficiency, and larger energy storage density than the supercritical compressed CO2 energy storage. However, the configuration of supercritical compressed CO2 energy storage is simpler, and the energy storage densities of the two systems are both higher than that of CAES, which is advantageous in terms of storage volume for a given power rating. Published by Elsevier Ltd.
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