Heat Integration of Solid Oxide Fuel Cell System

Abstract:

As solid oxide fuel cell (SOFC) has operating temperatures ranging between 973 K for intermediate temperature operation and 1273 K for high temperature operation, an advantage of the hot exhaust gas from SOFC can be used to drive a fuel processor for hydrogen production. In this study, the heat integration of a SOFC integrated with ethanol steam reformer, which is very highly endothermic reaction needed the large amount of energy supply, has been performed to improve the efficiency of SOFC system. In the conceptual design for heat integration, the pinch analysis is used. Under 1200 K of SOFC operating temperature and 973 K of reformer temperature, the hot exhaust gas leaving the SOFC is sufficient for heating requirements for the heat exchanger network and for the additional electricity generation from gas turbine. An energy integrated SOFC system presents a total electricity generation from SOFC and GT of 818 kW of which 386 kW is required for air compressor so an overall electricity production and efficiency are 432 kW and 35.0%, respectively.

• Periodical: Applied Mechanics and Materials (Volumes 541-542)
• Pages: 922-926
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.541-542.922
• Online since: March 2014
• Authors: Nawadee Srisiriwat, Chananchai Wutthithanyawat
• Keywords: Ethanol, Heat Integration, Hydrogen Production, Solid Oxide Fuel Cell (SOFC), Steam Reformer

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