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<p>Solar-driven hybrid power generation systems present a viable solution to addressing the global environmental challenges and energy-related concerns. This study assesses a solar-integrated geothermal flash cycle system for power generation, aiming to minimize the exergy that is not effectively utilized, typically. The system incorporates a thermal storage tank to ensure continuous operation during periods of insufficient solar energy. This paper investigates single-flash, double-flash, and triple-flash cycles each integrated with parabolic trough solar collectors and thermal storage components, analyzing each configuration as a distinct case. A multi-objective grey wolf optimization is applied to all cases to identify the optimal solutions in terms of thermodynamic and techno-economic viability. Additionally, a case study is conducted to assess the efficiency and functionality of the proposed system over the course of a year, utilizing real weather and solar radiation data from Seville, Spain. Under optimized conditions, the single-flash cycle yields the highest performance, with a net power output of 692.86&#xa0;kW, a levelized cost of electricity (LCOE) of 0.25 USD kW<sup>−1</sup>h<sup>−1</sup>, and an exergy efficiency of 5.75%. The energy efficiency and levelized cost of storage for the single-flash cycle case under baseline assumptions are 15.1% and 0.41 USD kWh<sup>−1</sup>, respectively. These results represent an improvement of 6.52% and 0.15 USD kW<sup>−1</sup>h<sup>−1</sup>compared to the case without solar integration. The capital payback period for single flash, with an electricity price of 200 USD MW<sup>−1</sup>h<sup>−1</sup>, is estimated to be 4.71 years.</p>

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Exploring the potential of performance improvement of an enhanced solar-integrated power generation geothermal flash cycle system with sensible thermal energy storage: techno-economic evaluation and multi-objective optimization

  • 期刊论文

  • 发表日期：

    2025年9月12日

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  • Paniz Arashrad,
  • Shayan Rabet,
  • Mortaza Yari,
  • Farzad Mohammadkhani

摘要

Solar-driven hybrid power generation systems present a viable solution to addressing the global environmental challenges and energy-related concerns. This study assesses a solar-integrated geothermal flash cycle system for power generation, aiming to minimize the exergy that is not effectively utilized, typically. The system incorporates a thermal storage tank to ensure continuous operation during periods of insufficient solar energy. This paper investigates single-flash, double-flash, and triple-flash cycles each integrated with parabolic trough solar collectors and thermal storage components, analyzing each configuration as a distinct case. A multi-objective grey wolf optimization is applied to all cases to identify the optimal solutions in terms of thermodynamic and techno-economic viability. Additionally, a case study is conducted to assess the efficiency and functionality of the proposed system over the course of a year, utilizing real weather and solar radiation data from Seville, Spain. Under optimized conditions, the single-flash cycle yields the highest performance, with a net power output of 692.86 kW, a levelized cost of electricity (LCOE) of 0.25 USD kW−1h−1, and an exergy efficiency of 5.75%. The energy efficiency and levelized cost of storage for the single-flash cycle case under baseline assumptions are 15.1% and 0.41 USD kWh−1, respectively. These results represent an improvement of 6.52% and 0.15 USD kW−1h−1compared to the case without solar integration. The capital payback period for single flash, with an electricity price of 200 USD MW−1h−1, is estimated to be 4.71 years.