Thermal Modeling and Management of Solid Oxide Fuel Cells Operating with Internally Reformed Methane

Yiyang Wu, Yixiang Shi, Ningsheng Cai, Meng Ni

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

A detailed three-dimensional mechanistic model of a large-scale solid oxide fuel cell (SOFC) unit running on partially pre-reformed methane is developed. The model considers the coupling effects of chemical and electrochemical reactions, mass transport, momentum and heat transfer in the SOFC unit. After model validation, parametric simulations are conducted to investigate how the methane pre-reforming ratio affects the transport and electrochemistry of the SOFC unit. It is found that the methane steam reforming reaction has a “smoothing effect”, which can achieve more uniform distributions of gas compositions, current density and temperature among the cell plane. In the case of 1500 W/m2power density output, adding 20% methane absorbs 50% of internal heat production inside the cell, reduces the maximum temperature difference inside the cell from 70 K to 22 K and reduces the cathode air supply by 75%, compared to the condition of completely pre-reforming of methane. Under specific operating conditions, the pre-reforming ratio of methane has an optimal range for obtaining a good temperature distribution and good cell performance.
Original languageEnglish
Pages (from-to)203-212
Number of pages10
JournalJournal of Thermal Science
Volume27
Issue number3
DOIs
Publication statusPublished - 1 Jun 2018

Keywords

  • Methane Steam Reforming
  • Modelling
  • Pre-reforming Percentage
  • Smoothing Effect
  • Solid Oxide Fuel Cell

ASJC Scopus subject areas

  • Condensed Matter Physics

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