Multi-objective design and operation of Solid Oxide Fuel Cell (SOFC) Triple Combined-cycle Power Generation systems: Integrating energy efficiency and operational safety

Sharifzadeh, M ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1016/j.apenergy.2016.11.010
  3. Publisher: Elsevier Ltd , 2017
  4. Abstract:
  5. Energy efficiency is one of the main pathways for energy security and environmental protection. In fact, the International Energy Agency asserts that without energy efficiency, 70% of targeted emission reductions are not achievable. Despite this clarity, enhancing the energy efficiency introduce significant challenge toward process operation. The reason is that the methods applied for energy-saving pose the process operation at the intersection of safety constraints. The present research aims at uncovering the trade-off between safe operation and energy efficiency; an optimization framework is developed that ensures process safety and simultaneously optimizes energy-efficiency, quantified in economic terms. The developed optimization framework is demonstrated for a solid oxide fuel cell (SOFC) power generation system. The significance of this industrial application is that SOFC power plants apply a highly degree of process integration resulting in very narrow operating windows. However, they are subject to significant uncertainties in power demand. The results demonstrate a strong trade-off between the competing objectives. It was observed that highly energy-efficient designs feature a very narrow operating window and limited flexibility. For instance, expanding the safe operating window by 100% will incur almost 47% more annualized costs. Establishing such a trade-off is essential for realizing energy-saving. © 2016 Elsevier Ltd
  6. Keywords:
  7. Integrated process design and control ; Multi-objective optimization under uncertainty ; Safe process operation ; SOFC Triple Combined-cycle Power Generation Systems ; Calendering ; Economic and social effects ; Emission control ; Energy conservation ; Energy security ; Fuel cells ; Industrial plants ; Multiobjective optimization ; Process design ; Solid oxide fuel cells (SOFC) ; Combined cycle ; Energy-efficient design ; Integrated process designs ; International energy agency ; Multi-objective design ; Optimization framework ; Power generation systems ; Safe process ; Energy efficiency ; Demand analysis ; Design ; Environmental protection ; Fuel cell ; Operations technology ; Optimization ; Oxide group ; Power generation ; Security ; Uncertainty analysis
  8. Source: Applied Energy ; Volume 185 , 2017 , Pages 345-361 ; 03062619 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0306261916315963