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Annual performance of a solar aided coal-fired power generation system (SACPG) with various solar field areas and thermal energy storage capacity

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Listed:
  • Wu, Junjie
  • Hou, Hongjuan
  • Yang, Yongping
  • Hu, Eric

Abstract

Integrating solar energy into a conventional fossil-fuel fired power plant through solar-aided coal-fired power generation (SACPG) mechanism has been proven to be an efficient way to use solar energy for power generation purposes. However, due to the rather intermittency of solar radiation, SACPG systems always work under off-design conditions. In this paper, hourly based annual performances of a SACPG system was simulated and analyzed with various solar field sizes and thermal energy storage (TES) capacity under different (plant) load conditions in a 330MW power plant case study. The results indicate that, TES system could stabilize the solar thermal output and improve the stability of the SACPG system at different loads. And it could also improve solar contribution in the power generation and annual peak solar-to-electricity efficiency. Through case study, the minimum levelized energy of costs and corresponding aperture area in this case are $0.0629/kWh, 1.413×105m2 for 100% load, $0.0654/kWh, 9.42×104m2 for 75% load, and $0.0730/kWh and 5.89×104m2 for 50% load, respectively. And the corresponding optimized TES hour with different loads is found to be 0.5h. The values are relatively lower than the reference trough plant.

Suggested Citation

  • Wu, Junjie & Hou, Hongjuan & Yang, Yongping & Hu, Eric, 2015. "Annual performance of a solar aided coal-fired power generation system (SACPG) with various solar field areas and thermal energy storage capacity," Applied Energy, Elsevier, vol. 157(C), pages 123-133.
    • Handle: RePEc:eee:appene:v:157:y:2015:i:c:p:123-133
    DOI: 10.1016/j.apenergy.2015.08.022
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    References listed on IDEAS

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