Design of stationary PEFC system configurations to meet heat and power demands

This paper presents heat and power efficiencies of a modeled PEFC system and the methods used to create the system configuration. The paper also includes an example of a simulated fuel cell system supplying a building in Sweden with heat and power. The main method used to create an applicable fuel cell system configuration is pinch technology. This technology is used to evaluate and design a heat exchanger network for a PEFC system working under stationary conditions, in order to find a solution with high heat utilization. The heat exchanger network in the system connecting the reformer, the burner, gas cleaning, hot-water storage and the PEFC stack will affect the heat transferred to the hot-water storage and thereby the heating of the building. The fuel, natural gas, is reformed to a hydrogen-rich gas within a slightly pressurized system. The fuel processor investigated is steam reforming, followed by high- and low-temperature shift reactors and preferential oxidation. The system is connected to the electrical grid for backup and peak demands and to a hot-water storage to meet the varying heat demand for the building. The procedure for designing the fuel cell system installation as co-generation system is described, and the system is simulated for a specific building in Sweden during 1 year. The results show that the fuel cell system in combination with a burner and hot-water storage could supply the building with the required heat without exceeding any of the given limitations. The designed co-generation system will provide the building with most of its power requirements and would further generate income by sale of electricity to the power grid.

[1]  Paul Leonard Adcock,et al.  Effect of operating pressure on the system efficiency of a methane-fuelled solid polymer fuel cell power source , 1998 .

[2]  D. R Croft,et al.  Energy Efficiency for Engineers and Technologists , 1990 .

[3]  Paul N. Cheremisinoff,et al.  Compressors and fans , 1992 .

[4]  G. Gummert.  Die PEFC in der Hausenergieversorgung , 1999 .

[5]  A. Hagiwara.  FUEL CELL SYSTEMS , 2022 .

[6]  Joan M. Ogden,et al.  ASSESSMENT OF HYDROGEN-FUELED PROTON EXCHANGE MEMBRANE FUEL CELLS FOR DISTRIBUTED GENERATION AND COGENERATION , 2000 .

[7]  J. C. Amphlett,et al.  Performance modeling of the Ballard Mark IV solid polymer electrolyte fuel cell. II: Empirical model development , 1995 .

[8]  Jay O. Keller,et al.  Hybrid energy storage systems for stand-alone electric power systems: optimization of system performance and cost through control strategies , 1999 .

[9]  B. Rajesh,et al.  HYDROGEN GENERATION FROM NATURAL GAS AND METHANOL FOR USE IN ELECTROCHEMICAL ENERGY CONVERSION SYSTEMS (FUEL CELL) , 1999 .

[10]  Christos A. Frangopoulos,et al.  Towards synthesis optimization of a fuel-cell based plant , 1999 .

[11]  James Larminie,et al.  Fuel Cell Systems Explained , 2000 .

[12]  J. C. Amphlett.  Performance Modeling of the Ballard Mark IV Solid Polymer Electrolyte Fuel Cell , 1995 .

[13]  M. J. Moran,et al.  Thermal design and optimization , 1995 .

[14]  Pierre R. Roberge,et al.  Development and application of a generalised steady-state electrochemical model for a PEM fuel cell , 2000 .

[15]  Pierre R. Roberge,et al.  A practical PEM fuel cell model for simulating vehicle power sources , 1995, Proceedings of the Tenth Annual Battery Conference on Applications and Advances.

[16]  Mikhail Sorin,et al.  Combined exergy and pinch approach to process analysis , 1997 .