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Peak and off-peak operations of the air separation unit in oxy-coal combustion power generation systems

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  • Hu, Yukun
  • Li, Xun
  • Li, Hailong
  • Yan, Jinyue

Abstract

Introducing CO2 capture and storage (CCS) into the power systems requires the re-investigation of the load balance for the electrical grid. For the oxy-coal combustion capture technology, the energy use of ASU can be shifted between the peak-load and off-peak-load periods, which may bring more benefits. In this paper, peak and off-peak (POP) operations for the air separation unit (ASU) with liquid oxygen storage were studied based on a 530MW coal-fired power system. According to the simulation results, the oxy-coal combustion power system running POP is technically feasible that it can provide a base load of 496MW during the off-peak period and a peak load of 613MW during the peak period. And the equivalent efficiency of the power system running POP is only 0.3% lower than the one not running POP. Moreover, according to the economic assessments based on the net present value, it is also economically feasible that the payback time of the investment of the oxy-coal combustion power system running POP is about 13years under the assumptions of 10% discount rate and 2.5% cost escalation rate. In addition, the effects of the difference of on-grid electricity prices, daily peak period, investment for POP operations, and ASU energy consumption were also analyzed, concerning the net present value.

Suggested Citation

  • Hu, Yukun & Li, Xun & Li, Hailong & Yan, Jinyue, 2013. "Peak and off-peak operations of the air separation unit in oxy-coal combustion power generation systems," Applied Energy, Elsevier, vol. 112(C), pages 747-754.
    • Handle: RePEc:eee:appene:v:112:y:2013:i:c:p:747-754
    DOI: 10.1016/j.apenergy.2012.12.001
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    References listed on IDEAS

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    1. Hu, Yukun & Yan, Jinyue & Li, Hailong, 2012. "Effects of flue gas recycle on oxy-coal power generation systems," Applied Energy, Elsevier, vol. 97(C), pages 255-263.
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    5. He, Xiufen & Liu, Yunong & Rehman, Ali & Wang, Li, 2021. "A novel air separation unit with energy storage and generation and its energy efficiency and economy analysis," Applied Energy, Elsevier, vol. 281(C).
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    9. Hanak, Dawid P. & Powell, Dante & Manovic, Vasilije, 2017. "Techno-economic analysis of oxy-combustion coal-fired power plant with cryogenic oxygen storage," Applied Energy, Elsevier, vol. 191(C), pages 193-203.
    10. Bailera, M. & Lisbona, P. & Llera, E. & Peña, B. & Romeo, L.M., 2019. "Renewable energy sources and power-to-gas aided cogeneration for non-residential buildings," Energy, Elsevier, vol. 181(C), pages 226-238.
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    12. Jin, Bo & Zhao, Haibo & Zheng, Chuguang & Liang, Zhiwu, 2018. "Control optimization to achieve energy-efficient operation of the air separation unit in oxy-fuel combustion power plants," Energy, Elsevier, vol. 152(C), pages 313-321.
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    14. Hanak, Dawid P. & Manovic, Vasilije, 2016. "Calcium looping with supercritical CO2 cycle for decarbonisation of coal-fired power plant," Energy, Elsevier, vol. 102(C), pages 343-353.
    15. Arias, B. & Criado, Y.A. & Sanchez-Biezma, A. & Abanades, J.C., 2014. "Oxy-fired fluidized bed combustors with a flexible power output using circulating solids for thermal energy storage," Applied Energy, Elsevier, vol. 132(C), pages 127-136.
    16. Kim, Juwon & Noh, Yeelyong & Chang, Daejun, 2018. "Storage system for distributed-energy generation using liquid air combined with liquefied natural gas," Applied Energy, Elsevier, vol. 212(C), pages 1417-1432.
    17. Zonouz, Masood Jalali & Mehrpooya, Mehdi, 2017. "Parametric study of a hybrid one column air separation unit (ASU) and CO2 power cycle based on advanced exergy cost analysis results," Energy, Elsevier, vol. 140(P1), pages 261-275.
    18. Eveloy, Valerie, 2019. "Hybridization of solid oxide electrolysis-based power-to-methane with oxyfuel combustion and carbon dioxide utilization for energy storage," Renewable and Sustainable Energy Reviews, Elsevier, vol. 108(C), pages 550-571.
    19. Bailera, Manuel & Lisbona, Pilar & Romeo, Luis M. & Espatolero, Sergio, 2016. "Power to Gas–biomass oxycombustion hybrid system: Energy integration and potential applications," Applied Energy, Elsevier, vol. 167(C), pages 221-229.
    20. 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, Elsevier, vol. 254(PC).
    21. Seo, Su Been & Kim, Hyung Woo & Kang, Seo Yeong & Go, Eun Sol & Keel, Sang In & Lee, See Hoon, 2021. "Techno-economic comparison between air-fired and oxy-fuel circulating fluidized bed power plants with ultra-supercritical cycle," Energy, Elsevier, vol. 233(C).
    22. García-Díez, E. & García-Labiano, F. & de Diego, L.F. & Abad, A. & Gayán, P. & Adánez, J. & Ruíz, J.A.C., 2016. "Optimization of hydrogen production with CO2 capture by autothermal chemical-looping reforming using different bioethanol purities," Applied Energy, Elsevier, vol. 169(C), pages 491-498.
    23. Zhou, Linfei & Duan, Lunbo & Anthony, Edward John, 2019. "A calcium looping process for simultaneous CO2 capture and peak shaving in a coal-fired power plant," Applied Energy, Elsevier, vol. 235(C), pages 480-486.
    24. Li, Yongliang & Cao, Hui & Wang, Shuhao & Jin, Yi & Li, Dacheng & Wang, Xiang & Ding, Yulong, 2014. "Load shifting of nuclear power plants using cryogenic energy storage technology," Applied Energy, Elsevier, vol. 113(C), pages 1710-1716.

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