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Exergy analysis of off-design performance in solar-aided power generation systems: Evaluating the rationality of using part-load operation solution of coal-fired plants

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  • Huang, Guangqin
  • Huang, Chang
  • Liu, Han
  • Huang, Huamao
  • Shang, Wentao
  • Wang, Weiliang

Abstract

Solar aided coal-fired power generation (SAPG) technology has been proven to be an effective way of renewable energy utilization. However, the efficiency of coal-fired units declines at partial loads, and solar inputs may further force the system to deviate from its design condition. In particular, part-load operation solutions for coal-fired units (PLOS) are conventionally applied to the SAPG system, a practice whose appropriateness has not yet been thoroughly evaluated. This paper, therefore, selects a 330 MW SAPG plant as a case study to conduct an exhaustive exergy analysis under off-design conditions. The findings indicate that the governing stage of the steam turbine and the slip-pressure operation are the main contributors to the efficiency degradation at partial loads. In addition, solar input resulted in significant changes in key operating parameters, such as exhaust flow rate and the pressure of each turbine stage. Merely adopting the PLOS for SAPG systems results in a marked increase in standard coal consumption by 0.99, 2.82, and 3.63 g/kWh at 50 %, 40 %, and 30 % load, respectively. However, the introduction of solar energy presents the potential to operate the unit more efficiently, particularly when valve point conditions are optimally adjusted. For instance, upon input of 28 MW solar thermal power, the #3 valve point condition shifted from a load of 321 MW–330 MW, achieving a reduction in standard coal consumption by 0.96 g/kWh, compared to the design condition of the original coal-fired unit. This study underscores the irrationality of directly applying PLOS from coal-fired units to SAPG system without tailored adjustments for solar integration.

Suggested Citation

  • Huang, Guangqin & Huang, Chang & Liu, Han & Huang, Huamao & Shang, Wentao & Wang, Weiliang, 2024. "Exergy analysis of off-design performance in solar-aided power generation systems: Evaluating the rationality of using part-load operation solution of coal-fired plants," Energy, Elsevier, vol. 302(C).
    • Handle: RePEc:eee:energy:v:302:y:2024:i:c:s0360544224015226
    DOI: 10.1016/j.energy.2024.131749
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    References listed on IDEAS

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    1. Huang, Chang & Hou, Hongjuan & Hu, Eric & Liang, Mingyu & Yang, Yongping, 2017. "Impact of power station capacities and sizes of solar field on the performance of solar aided power generation," Energy, Elsevier, vol. 139(C), pages 667-679.
    2. Yang, Hongliang & Pollitt, Michael, 2009. "Incorporating both undesirable outputs and uncontrollable variables into DEA: The performance of Chinese coal-fired power plants," European Journal of Operational Research, Elsevier, vol. 197(3), pages 1095-1105, September.
    3. Ding, Zeyu & Hou, Hongjuan & Duan, Liqiang & Huang, Chang & Hu, Eric & Yu, Gang & Zhang, Yumeng & Zhang, Nan, 2021. "Simulation study on a novel solar aided combined heat and power system for heat-power decoupling," Energy, Elsevier, vol. 220(C).
    4. C. Oberschelp & S. Pfister & C. E. Raptis & S. Hellweg, 2019. "Global emission hotspots of coal power generation," Nature Sustainability, Nature, vol. 2(2), pages 113-121, February.
    5. Huang, Chang & Hou, Hongjuan & Hu, Eric & Yu, Gang & Chen, Si & Yang, Yongping, 2020. "Measures to reduce solar energy dumped in a solar aided power generation plant," Applied Energy, Elsevier, vol. 258(C).
    6. Shagdar, Enkhbayar & Lougou, Bachirou Guene & Shuai, Yong & Anees, Junaid & Damdinsuren, Chimedsuren & Tan, Heping, 2020. "Performance analysis and techno-economic evaluation of 300 MW solar-assisted power generation system in the whole operation conditions," Applied Energy, Elsevier, vol. 264(C).
    7. Li, Chao & Sun, Yang & Bi, Tianjiao & Zhai, Rongrong, 2023. "Performance enhancement of a solar-assisted pulverized coal power system by integrating a supercritical CO2 cycle," Renewable Energy, Elsevier, vol. 219(P1).
    8. Ren, Guorui & Liu, Jinfu & Wan, Jie & Guo, Yufeng & Yu, Daren, 2017. "Overview of wind power intermittency: Impacts, measurements, and mitigation solutions," Applied Energy, Elsevier, vol. 204(C), pages 47-65.
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