Yang, DL;
Tang, GH;
Sheng, Q;
Li, XL;
Fan, YH;
He, YL;
Luo, KH;
(2023)
Effects of multiple insufficient charging and discharging on compressed carbon dioxide energy storage.
Energy
, 278
(A)
, Article 127901. 10.1016/j.energy.2023.127901.
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Abstract
Compressed carbon dioxide is a promising energy storage technology. However, renewable energy variability can lead to insufficiency during charging and discharging. The present work systematically investigates the effect of charging/discharging insufficiency on compressed carbon dioxide energy storage systems from the viewpoint of transient thermodynamic cycles. The insufficiency extent is defined based on the pressure at the high-pressure tank when disturbances occur. Then the effects of insufficiency extent are investigated in three typical scenarios. In the results, the effects of charging/discharging insufficiency on the efficiency, storage density and power output of the energy storage system during long-term operation are demonstrated. The efficiency of the system during the whole working period is 57.78%, lower than the design efficiency of 59.66%. In particular, the energy storage density is reduced dramatically to 197.60 kJ·m−3, which is 78.2% of the storage density of 252.68 kJ·m−3 at design conditions. Besides, the average output power of the turbine is reduced to 95.70% of the design value. The present work provides an improved understanding of the charging and discharging for compressed carbon dioxide energy storage, especially when renewables are integrated.
| Type: | Article |
|---|---|
| Title: | Effects of multiple insufficient charging and discharging on compressed carbon dioxide energy storage |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.energy.2023.127901 |
| Publisher version: | https://doi.org/10.1016/j.energy.2023.127901 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Charging and discharging, Renewable energy variability, Compressed carbon dioxide energy storage, Dynamic operation analysis |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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 Mechanical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10174282 |
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