System Level Exergy Assessment of Strategies Deployed for SOFC Stack Temperature Regulation and Thermal Gradient Reduction

Tang, Shi, Amiri, Amirpiran and Tadé, Moses O. (2019). System Level Exergy Assessment of Strategies Deployed for SOFC Stack Temperature Regulation and Thermal Gradient Reduction. Industrial and Engineering Chemistry Research ,

Abstract

Several operational strategies for Solid Oxide Fuel Cell (SOFC) temperature regulation and temperature gradient minimisation at cell scale have previously been assessed by the authors (Amiri et al., Ind. Eng. Chem. Res., 2016). The application of such strategies at system scale, however, requires a numerical linkage between the cell and system performance metrics allowing simultaneous evaluation of the dominant process interactions. The objective of this study is to analytically examine the effectiveness and applicability of the mentioned thermal management methods at system scale. To achieve this, a system level exergy analysis is presented by using a modelling platform in which a detailed 4-cell short stack module and the Balance-of-Plant (BoP) are integrated. Linkage between the system performance metrics and the stack internal temperature gradient is specifically emphasised. For this, the exergy intensive points (unit operations) are identified throughout the plant. Subsequently, the effective strategies that had been employed for the cell level thermal management proposed in our previous work (Amiri et al., Ind. Eng. Chem. Res., 2016) are examined at the system level capturing the effects on the state of BoP exergy intensive components. Moreover, fuel design is proposed and evaluated as a potential thermal management strategy. Combination of variety of measures including the exergy destruction rates, the electrical and thermal efficiencies, and the stack internal temperature gradient provides a comprehensive set of data contributing to the SOFC system thermal management.

Publication DOI: https://doi.org/10.1021/acs.iecr.8b04142
Divisions: Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Engineering & Applied Sciences
Additional Information: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Industrial & Engineering Chemistry Research, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.iecr.8b04142
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Related URLs: https://pubs.acs.org/doi/10.1021/acs.iecr.8b04142 (Publisher URL)
Published Online Date: 2019-01-16
Authors: Tang, Shi
Amiri, Amirpiran ( 0000-0001-7838-3249)
Tadé, Moses O.

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