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Research Papers

A Dynamic Model of PEMFC System for the Simulation of Residential Power Generation

[+] Author and Article Information
S. Yu, J. Han

 Chungnam National University, Daejon 305764, Korea

S. M. Lee, Y. D. Lee, K. Y. Ahn

 Korea Institute of Machinery and Materials, Daejon 305343, Korea

J. Fuel Cell Sci. Technol 7(6), 061009 (Aug 20, 2010) (7 pages) doi:10.1115/1.4001763 History: Received October 30, 2009; Revised March 19, 2010; Published August 20, 2010; Online August 20, 2010

A proton exchange membrane fuel cell (PEMFC) system of residential power generator (RPG) has a different operating strategy from the PEMFC system of transportation application because of its environmental difference. In this study, a dynamic simulation model of the PEMFC system is introduced, which has a model for a turbo blower, a membrane humidifier, two cooling circuits, and a PEMFC stack. The thermal efficiency of the PEMFC system for the RPG is very high because it supplies the electricity and hot water to the house. This study is designed to study the dynamic response of individual components during the dynamic change of current density. In particular, since the operation of the turbo blower is very sensitive at low current density, the parasitic power consumption of the blower is significant. Additionally, the system performance and the operating strategy are also presented.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

A schematic diagram of residential power generation fuel cell system

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Figure 2

Schematic of Nafion® tube humidifier and actual image of FC150 (Perma Pure® )

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Figure 3

Coolant flow rate of first cooling circuit managed by PI controller

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Figure 4

1 kW air blower for RPGFC developed by KIMM

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Figure 5

Experimental P-Q and efficiency curve of 1 kW air blower developed by KIMM

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Figure 6

Integration of the dynamic fuel cell stack model with blower, humidifier, and cooling system

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Figure 7

Profile of current density for understanding system characteristics

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Figure 8

Thermal efficiency and electric efficiency in terms of current density

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Figure 9

Change of stack voltage responding the change of current density

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Figure 10

Parasitic power consumption for driving BOP to gross power of FC stack

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Figure 11

Total efficiency and electric efficiency of the RPGFC system

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Figure 12

Dynamic response of air stoichiometry with increasing current density

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Figure 13

Air temperature and humidity change in respond to the variation in current density

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Figure 14

Coolant temperature of first cooling circuit and second cooling circuit

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