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Integrating compressed CO(2 )energy storage in an oxy-coal combustion power plant with CO2 capture
Shandong Univ, Inst Adv Technol, Jinan 250061, Peoples R China..
Tianjin Univ Commerce, Sch Mech Engn, Tianjin Key Lab Refrigerat Technol, Tianjin, Peoples R China..
UCL, Dept Civil Environm & Geomat Engn, London WC1E 6BT, England..
Tianjin Univ Commerce, Sch Mech Engn, Tianjin Key Lab Refrigerat Technol, Tianjin, Peoples R China..
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2022 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 254, article id 124493Article in journal (Refereed) Published
Abstract [en]

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_O-2). 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_O-2. 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_O-2. 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_O-2.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2022. Vol. 254, article id 124493
Keywords [en]
Compressed CO2 energy storage, CO2 capture, Oxy-coal combustion, Time of use tariff, Carbon mitigation cost
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-59569DOI: 10.1016/j.energy.2022.124493ISI: 000816893000008Scopus ID: 2-s2.0-85132330869OAI: oai:DiVA.org:mdh-59569DiVA, id: diva2:1682968
Available from: 2022-07-13 Created: 2022-07-13 Last updated: 2022-08-29Bibliographically approved

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