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WIREs Energy Environ.
Impact Factor: 3.297

Design of fuel‐cell micro‐cogeneration systems through modeling and optimization

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Abstract Micro‐cogeneration is a promising technology that has the potential to lower energy costs and CO2 emissions in the residential housing sector. Among the different micro‐cogeneration technologies, fuel cells offer the potential benefits of the highest electrical efficiency, lowest emissions, and a heat‐to‐power ratio that is well suited for residential applications. The design of fuel‐cell micro‐cogeneration systems involves decision making in which trade‐offs are made between conflicting objectives. This paper illustrates the use of modeling and optimization in informing system design by generating different design alternatives that contain these trade‐offs, thus allowing the design engineers to make decisions in a quantitative and rational way. This article is categorized under: Fuel Cells and Hydrogen > Science and Materials Fuel Cells and Hydrogen > Systems and Infrastructure
The micro‐cogeneration concept showing the import/export of electricity.
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Values of the individual efficiencies, (a) electrical efficiency and (b) thermal efficiency, corresponding to the Pareto set in Figure . (Reprinted with permission from Ref 14. Copyright 2011 Elsevier.)
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Values of the overall efficiency corresponding to the Pareto set in Figure . (Reprinted with permission from Ref 14. Copyright 2011 Elsevier.)
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Pareto set showing the trade‐offs between the net electrical power output (Wdel) and fuel consumption (Wfuel). (Reprinted with permission from Ref 14. Copyright 2011 Elsevier.)
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A Pareto set showing the trade‐off between efficiency and size of the stack. (Reprinted with permission from Ref 20. Copyright 2010 Elsevier.)
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Schematic of a fuel cell micro‐cogeneration system. The symbols in the diagram refer to as follows: deS, desulfuriser; hex, heat exchanger; hum, humidifier; inv, DC/AC converter; PrOx, preferential oxidation reactor; SR, steam reformer; WGS, water gas shift reactor. (Reprinted with permission from Ref 14. Copyright 2011 Elsevier.)
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Illustration of a typical electrical and heat load for a UK dwelling. Values are in (average) kW, for each 5 min period of a typical winter day. On the basis of data from IEA Annex 42. (Reprinted from Ref 24. Copyright 2007, IEA.)
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A typical fuel cell system design process. (Reprinted from Ref 4. Copyright 2005, Elsevier.)
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Illustration of the operating range of a fuel cell, showing (a) stack voltage and power and (b) electrical and thermal efficiency. Labeled operating points are described in the text.
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Illustration of fuel cell operation taking the hydrogen‐fuelled polymer electrolyte fuel cell (PEFC) as an example.
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Fuel Cells and Hydrogen > Science and Materials
Fuel Cells and Hydrogen > Systems and Infrastructure

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