Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5013404 | Energy Conversion and Management | 2016 | 11 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
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Energy (General)
Authors
Hui Liu, Qing He, Andrea Borgia, Lehua Pan, Curtis M. Oldenburg,