NDLI: Application of a Decomposition Strategy to the Optimal Synthesis/Design of a Fuel Cell Sub-System

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Oyarza´bal, Borja Michael, R. Von Spokovsky Michael, W. Ellis Mun˜oz, J. Ricardo Nikolaos, G. Georgopoulos
Copyright Year	2002
Abstract	The application of a decomposition methodology to the synthesis/design optimization of a stationary cogeneration fuel cell sub-system for residential/commercial applications is the focus of this paper. To accomplish this, a number of different configurations for the fuel cell sub-system were considered. The most promising candidate configuration, which combines features of different configurations found in the literature, is chosen for detailed thermodynamic, geometric, and economic modeling both at design and off-design. The case is then made for the usefulness and need of decomposition in large-scale optimization. The types of decomposition strategies considered are conceptual/time and physical decomposition. Specific solution approaches to the latter, namely Local-Global Optimization (LGO) are outlined in the paper. Conceptual/time decomposition and physical decomposition using the LGO approach are applied to the fuel cell sub-system. These techniques prove to be useful tools for simplifying the overall synthesis/design optimization problem of the fuel cell sub-system. Finally, the results of the decomposed synthesis/design optimization of the fuel cell sub-system indicate that this sub-system is more economical for a relatively large cluster of residences (i.e. 50). To achieve a unit cost of power production of less than 10 cents/kWh on an exergy basis requires the manufacture of more than 1500 fuel cell sub-system units per year. In addition, based on the off-design optimization results, the fuel cell sub-system is unable by itself to satisfy the winter heat demands. Thus, the case is made for integrating the fuel cell sub-system with another sub-system, namely, a heat pump, to form what is called a total energy system.
Sponsorship	Advanced Energy Systems Division
Starting Page	365
Ending Page	377
Page Count	13
File Format	PDF
ISBN	0791836266
DOI	10.1115/IMECE2002-33317
Volume Number	Advanced Energy Systems
Conference Proceedings	ASME 2002 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2002-11-17
Publisher Place	New Orleans, Louisiana, USA
Access Restriction	Subscribed
Subject Keyword	Design Heat Heat pumps Fuel cells Energy generation Exergy Combined heat and power Modeling Optimization
Content Type	Text
Resource Type	Article

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