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Thermodynamic and economic analyses of the biomass gasification Allam cycle integrated with compressed carbon energy storage

Author

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  • Fu, Yidan
  • Cai, Lei
  • Qi, Chenyu
  • Zhai, Jiangfeng

Abstract

The Allam cycle is a novel oxy-fuel power system that has the potential to achieve efficient negative carbon emissions. Compressed carbon energy storage (CCES) technology could improve the stability of power plants. A biomass gasification Allam cycle combined with the CCES system is proposed and evaluated in this research. The energy efficiency of the Allam-CCES cycle during the charge and discharge time is 36.43 % and 39.45 %, respectively. The round trip efficiency (RTE) of the CCES system is 62.04 %. The exergy destruction of the Allam-CCES system is 317.02 MW. Economic analysis shows that the proposed system has a net present value of 447347.97 k$, implying benefits in economic performance. The total cost rate of the Allam-CCES system is 6959.63 $/h. The influence of the storage pressure on the CCES system is evaluated. The RTE drops from 64.55 % to 61.12 % as the high storage pressure rises. The variation of RTE has a crest when the low storage pressure is near critical pressure. The highest RTE is 90.71 % in the research range of low storage pressure. This paper could provide information on biomass gasification Allam cycle integrated with CCES technology, and offer insights to realize efficient and economic carbon emissions reduction.

Suggested Citation

  • Fu, Yidan & Cai, Lei & Qi, Chenyu & Zhai, Jiangfeng, 2024. "Thermodynamic and economic analyses of the biomass gasification Allam cycle integrated with compressed carbon energy storage," Energy, Elsevier, vol. 303(C).
    • Handle: RePEc:eee:energy:v:303:y:2024:i:c:s0360544224017572
    DOI: 10.1016/j.energy.2024.131984
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