Performance improvement of a direct carbon solid oxide fuel cell system by combining with a Stirling cycle

Haoran Xu, Bin Chen, Peng Tan, Houcheng Zhang, Jinliang Yuan, Jiang Liu, Meng Ni

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)

Abstract

The amount of the heat released in the DC-SOFC is determined based on a previously validated 2D tubular DC-SOFC model, in which the electrochemical reaction, chemical reactions, ion/electronic charge transport, mass transport and momentum transport are fully considered. Numerical calculations show that the overall heat released in the cell may be smaller than, equal to or larger than the heat required by the internal Boudouard reaction, and accordingly, three different operating modes of the system are given. The analytical expressions for the equivalent power output and efficiency for the DC-SOFC, Stirling cycle and the hybrid system are specified under different operating conditions. The results show that the power density and efficiency of the proposed system allow 4000 W m−2and 30% larger than that of the stand-alone DC-SOFC at 30000 A m−2, respectively. Parametric studies also show that a higher operating temperature and a smaller distance between carbon layer and anode will increase the overall power density and efficiency of the proposed system.
Original languageEnglish
Pages (from-to)979-987
Number of pages9
JournalEnergy
Volume140
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Boudouard reaction
  • Heat management
  • Solid carbon
  • Solid oxide fuel cell
  • Stirling cycle

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Energy(all)
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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