Affiliation:
1. Georgia Tech Center for Innovative Fuel Cell and Battery Technologies, Georgia Tech Research Institute, Atlanta, GA 30332-0853
2. The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
Abstract
Fuel cell technology is a promising means of energy conversion. As the technology matures, process design and analysis are gaining importance. The conventional measures of fuel cell performance (i.e., gross real and voltage efficiencies) are limited indices-of- merit. Contemporary second law concepts (availability/exergy, irreversibility, exergetic efficiency) have been used to enhance fuel cell evaluation. A previously modeled solid oxide fuel cell has been analyzed using both conventional measures and the contemporary thermodynamic measures. Various cell irreversibilities were quantified, and their impact on cell inefficiency was better understood. Exergetic efficiency is more comprehensive than the conventional indices-of- performance. This parameter includes thermal irreversibilities, considers the value of effluent exergy, and has a consistent formulation. Usage of exergetic efficiency led to process design discoveries different from the trends observed in conjunction with the conventional efficiency measures. The decision variables analyzed were operating pressure, air stoichiometric number (inverse equivalence ratio), operating voltage and fuel utilization.
Subject
Geochemistry and Petrology,Mechanical Engineering,Energy Engineering and Power Technology,Fuel Technology,Renewable Energy, Sustainability and the Environment
Reference26 articles.
1. Veyo, S. V., 1998, “Tubular SOFC Power System Operational Experience,” Abstracts of the 1998 Fuel Cells Seminar, Palm Springs, pp. 457-460.
2. Rosen, M. A. , 1990, “Comparison Based on Energy and Exergy Analyses of the Potential Cogeneration Efficiencies for Fuel Cells and Other Electricity Generation Devices,” Int. J. Hydrogen Energy, 15, No. 4, pp. 267–274.
3. Harvey, S. P., and Richter, H. J., 1994, “Gas Turbine Cycles With Solid Oxide Fuel Cells; Part II: A Detailed Study of a Gas Turbine Cycle With an Integrated Internal Reforming Solid Oxide Fuel Cell Technology,” ASME J. Energy Resour. Technol., 116, pp. 312–318.
4. Dunbar, W. R., Lior, N., and Gaggioli, R. A., 1991, “Combining Fuel Cells with Fuel-Fired Power Plants for Improved Exergy Efficiency,” Energy (Oxford), 16, No. 10, pp. 1259–1274.
5. Dunbar, W. R., Lior, N., and Gaggioli, R. A., 1993, “The Effect of the Fuel-Cell Unit Size on the Efficiency of a Fuel-Cell-Topped Rankine Power Cycle,” ASME J. Energy Resour. Technol., 115, pp. 105–107.
Cited by
10 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献