Evaluation of the waste heat and residual fuel from the solid oxide fuel cell and system power optimization

Yingcai Huang, Qiubao Lin, Huiying Liu, Meng Ni, Xiuqin Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Based on electrochemistry and thermodynamics, the electric power, flow rate of waste heat, and composition of residual fuel from the SOFC are calculated, respectively, under a given flow rate of natural gas into the anode of SOFC. The working substance of Carnot cycle absorbs heat in the cooling-tube of SOFC stack and the efficiency of the cycle is derived by considering the finite-rate heat transfer and internal irreversible losses. The working substance of Brayton cycle absorbs high-temperature heat from the combustion products of the residual hydrogen and the efficiency of Brayton cycle is obtained by considering the finite-rate heat transfer and irreversible compression and expansion processes. To achieve optimal power of SOFC or the maximum power of the hybrid system, the favorable working temperature, mole flow rate of natural gas, and hydrogen utilization factor in SOFC are calculated by using MATLAB software.
Original languageEnglish
Pages (from-to)1166-1173
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume115
DOIs
Publication statusPublished - 1 Dec 2017

Keywords

  • Brayton cycle
  • Carnot cycle
  • Irreversibility
  • Performance optimization
  • Solid oxide fuel cell

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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