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Performance analysis of a novel combined solar trough and tower aided coal-fired power generation system

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  • Liu, Hongtao
  • Zhai, Rongrong
  • Patchigolla, Kumar
  • Turner, Peter
  • Yang, Yongping

Abstract

Solar-aided coal-fired power generation systems have been extensively studied and exhibit several advantages in the utilisation of solar energy. The issue with the solar augmentation of coal-fired plants is the limitation of the potential solar contribution that is practical to achieve when considering boiler safety issues. This study proposes the combination of parabolic troughs and solar towers to collect solar energy, that is then introduced into the preheaters and boilers of coal-fired power plants. Under the same investment conditions, this combination of solar technologies can provide more solar exergy and reduce the practical constraints on the solar contribution. The paper shows that the potential for a 660MWe power plant, integrated with a combined solar field allows the highest solar exergy share of 8.51% to be reached. This enables an increased fuel saving of at least 1.58 and 4.24 g/kWh compared to other systems, that gives a minimum coal consumption of 253.17 and 255.83 g/kWh, respectively. The combined solar field provides a maximum available solar exergy of 69.43 MWth, which is 7.83%–11.88% higher than the alternative compared systems. The enhanced solar exergy contribution and cost-effectiveness can be observed in this novel system under different solar loads and cost conditions.

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  • Liu, Hongtao & Zhai, Rongrong & Patchigolla, Kumar & Turner, Peter & Yang, Yongping, 2020. "Performance analysis of a novel combined solar trough and tower aided coal-fired power generation system," Energy, Elsevier, vol. 201(C).
    • Handle: RePEc:eee:energy:v:201:y:2020:i:c:s0360544220307040
    DOI: 10.1016/j.energy.2020.117597
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    References listed on IDEAS

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    9. Arnaoutakis, Georgios E. & Katsaprakakis, Dimitris Al. & Christakis, Dimitris G., 2022. "Dynamic modeling of combined concentrating solar tower and parabolic trough for increased day-to-day performance," Applied Energy, Elsevier, vol. 323(C).
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