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<p>This study investigates a combined cycle power plant (CCPP) integrated with a solar thermal field using linear parabolic collectors to simultaneously produce electricity and hydrogen. The research addresses the growing need for efficient and sustainable energy systems by evaluating the plant’s performance from energy, exergy, economic, and environmental perspectives. The system comprises a gas turbine, a dual-pressure heat recovery steam generator, a solar field, and a hydrogen production unit based on electrochemical separation. A multi-objective optimization approach is applied to minimize the annual operating cost and maximize exergy efficiency. Results indicate that the combustion chamber is the dominant source of exergy destruction, accounting for 34,389 kW out of a total of 38,829.2 kW in the gas cycle. Increasing the minimum allowable water content leads to higher steam recovery in the low-pressure section, enhancing both electricity and hydrogen output. Under optimal conditions, the system achieves a net power generation of 37,935.80 kW, an exergy efficiency of 47.56%, and a hydrogen production rate of 35.28 kg per hour. The novelty of this work lies in the integration of solar thermal energy with combined cycle and hydrogen production technologies under a unified optimization framework, offering improvements in both performance and sustainability beyond previous designs.</p>

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Technical and economic evaluation of combined cycle power plant with ET100 linear parabolic collectors

  • 期刊论文

  • 发表日期：

    2025年9月21日

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  • Mohammad Shafiey Dehaj,
  • Hassan Hajabdollahi

摘要

This study investigates a combined cycle power plant (CCPP) integrated with a solar thermal field using linear parabolic collectors to simultaneously produce electricity and hydrogen. The research addresses the growing need for efficient and sustainable energy systems by evaluating the plant’s performance from energy, exergy, economic, and environmental perspectives. The system comprises a gas turbine, a dual-pressure heat recovery steam generator, a solar field, and a hydrogen production unit based on electrochemical separation. A multi-objective optimization approach is applied to minimize the annual operating cost and maximize exergy efficiency. Results indicate that the combustion chamber is the dominant source of exergy destruction, accounting for 34,389 kW out of a total of 38,829.2 kW in the gas cycle. Increasing the minimum allowable water content leads to higher steam recovery in the low-pressure section, enhancing both electricity and hydrogen output. Under optimal conditions, the system achieves a net power generation of 37,935.80 kW, an exergy efficiency of 47.56%, and a hydrogen production rate of 35.28 kg per hour. The novelty of this work lies in the integration of solar thermal energy with combined cycle and hydrogen production technologies under a unified optimization framework, offering improvements in both performance and sustainability beyond previous designs.