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  3. کنترل پیش بین چندمتغیره برای یک سیستم هیبریدی پیل سوختی و میکروتوربین گازی
تحلیل و بهینه سازی سیستم تولید همزمان هیدروژن، متانول و توان مبتنی بر چرخه ی ترموشیمیایی خورشیدی و چرخه ی اکسیفیول
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تحلیل و بهینه سازی سیستم تولید همزمان هیدروژن، متانول و توان مبتنی بر چرخه ی ترموشیمیایی خورشیدی و چرخه ی اکسیفیول

اکبری، شاهین Akbari, Shahin

Analysis and Optimization of a Cogeneration System of Hydrogen, Methanol, and Power based on a Solar Thermochemical Cycle and an Oxy-Fuel Cycle

Akbari, Shahin | 2025

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 58601 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Shafii, Mohammad Behshad; Hakkaki Fard, Ali; Bijarchi, Mohamad Ali
  7. Abstract:
  8. Power-to-X technologies play a key role in the future energy landscape, as they convert electricity from renewable sources into valuable fuels and chemicals. This study proposes an innovative solar-based system for methanol production, designed as a case study to decarbonize an existing power plant. The carbon dioxide used in the methanol synthesis unit is supplied from an existing power plant in Iran, which has been retrofitted with various oxy-fuel combustion configurations. In addition, the impact of co-firing with alternative fuels, including hydrogen and methanol, on the combustion process has been investigated. In this system, the copper–chlorine (Cu–Cl) thermochemical cycle is integrated with the studied power plant as a promising technology for sustainable hydrogen production, to assess the feasibility of cost-effective e-methanol production compared to other technologies. The developed model adopts a cost-based approach linked to grid electricity prices. To examine the performance and economic potential of this strategy, Australia is selected as the case study, where the influence of flexible operation strategies on the performance of the solar power plant can be evaluated. Subsequently, quasi-steady hourly simulations were carried out, and the impact of real solar irradiation conditions on the system’s annual performance was analyzed using meteorological data. Multi-objective optimization identified the optimal system design, leading to a levelized methanol cost of 1,568 $/tonMeOH and an overall efficiency of 14.7%. Carbon dioxide emission analysis shows that the proposed system can utilize 33% of the annually captured CO₂, equivalent to 1.26 kg of CO₂ per kg of methanol produced. Moreover, projections for 2050 indicate that with the implementation of carbon taxation and reductions in key cost-driving components, the methanol production cost could be significantly reduced to around 379 $/tonMeOH
  9. Keywords:
  10. Methanol Production ; Oxy Fuel Combustion ; Carbon Dioxide Capture and Utilization ; Solar Electricity ; Concentrated Solar Power ; Economic and Technical Study ; Two Step Thermochemical Redox Cycle

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