Huang, Qingxi;
Yao, Jinduo;
Hu, Yukun;
Liu, Shengchun;
Li, Hailong;
Sun, Qie;
(2022)
Integrating compressed CO2 energy storage in an oxy-coal combustion power plant with CO2 capture.
Energy
, 254
(Part C)
, Article 124493. 10.1016/j.energy.2022.124493.
(In press).
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Abstract
To compensate for the high cost of CO2 capture, this study proposes a novel solution that integrates a compressed CO2 energy storage (CCES) system into an oxy-coal combustion power plant with CO2 capture (Oxy_CCES). The integration of energy storage has the potential to create arbitrage from variations in electricity prices. The proposed Oxy_CCES system can achieve a higher net efficiency of 34.1%, and a higher exergy efficiency of 57.5%, than that of a liquified oxygen storage-integrated oxy-coal combustion power plant (Oxy_O2). Two scenarios, i.e., retrofitting an existing oxy-coal combustion power plant (S–I) and building a new plant (S-II), were established to compare the Oxy_CCES and Oxy_O2. In S–I, the payback time of the Oxy_CCES is one year and in the S-II the levelized cost of electricity (LCOE) of the Oxy_CCES increases by 1.8%, which is lower than that of the Oxy_O2. The sensitivity analysis shows that, when the difference between the peak and the valley electricity prices and the capacities of the energy storage systems increase by 50%, the net present value (NPV) and LCOE of the Oxy_CCES system increase by 113.4% and 1.7% respectively, which are lower than the NPV and LCOE increase of the Oxy_O2.
| Type: | Article |
|---|---|
| Title: | Integrating compressed CO2 energy storage in an oxy-coal combustion power plant with CO2 capture |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.energy.2022.124493 |
| Publisher version: | https://doi.org/10.1016/j.energy.2022.124493 |
| Language: | English |
| Additional information: | © 2022 Published by Elsevier Ltd. This is an open access article under the CC BY 4.0 license Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/) |
| Keywords: | Compressed CO2 energy storage, CO2 capture, Oxy-coal combustion, Time of use tariff, Carbon mitigation cost |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10150436 |
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