Feasibility study on exergy recuperation of exhaust heat using electrochemical partial oxidation

T. Ozeki, Takao Nakagaki

Research output: Contribution to journalArticle

Abstract

Electrochemical partial oxidation (EPOx) of methane can convert exhaust heat into electricity as much as difference between change of Gibbs free energy and change of enthalpy. In this paper, we considered 30 kW power generation system combined Micro Gas Turbine and the Partial Oxdation Solid Oxide Fuel Cell using Gadolinium Doped Ceria as the electrolyte that has high oxide ion conductivity below 600°C. The cylindrical-shaped POSOFC is operated at 572°C recovering turbine exhaust heat of 593°C and accompanying production of hydrogen and carbon monoxide. According to the result of process simulation coupling with SOFC simulation including detailed polarization models, only addition of 16 liter POSOFC can increases the power generation efficiency by 8.5 points at fuel utilization of 80.1%.

Original languageEnglish
Pages (from-to)406-408
Number of pages3
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume76
Issue number763
Publication statusPublished - 2010 Mar
Externally publishedYes

Fingerprint

exergy
Exergy
Solid oxide fuel cells (SOFC)
Power generation
heat
Oxidation
oxidation
Gadolinium
gas turbines
Cerium compounds
turbines
Gibbs free energy
solid oxide fuel cells
gadolinium
electricity
Carbon monoxide
carbon monoxide
Gas turbines
Enthalpy
Methane

Keywords

  • Energy conversion
  • Exergy recuperation
  • Micro gas turbine
  • Solid oxide fuel cell

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

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abstract = "Electrochemical partial oxidation (EPOx) of methane can convert exhaust heat into electricity as much as difference between change of Gibbs free energy and change of enthalpy. In this paper, we considered 30 kW power generation system combined Micro Gas Turbine and the Partial Oxdation Solid Oxide Fuel Cell using Gadolinium Doped Ceria as the electrolyte that has high oxide ion conductivity below 600°C. The cylindrical-shaped POSOFC is operated at 572°C recovering turbine exhaust heat of 593°C and accompanying production of hydrogen and carbon monoxide. According to the result of process simulation coupling with SOFC simulation including detailed polarization models, only addition of 16 liter POSOFC can increases the power generation efficiency by 8.5 points at fuel utilization of 80.1{\%}.",
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AU - Nakagaki, Takao

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N2 - Electrochemical partial oxidation (EPOx) of methane can convert exhaust heat into electricity as much as difference between change of Gibbs free energy and change of enthalpy. In this paper, we considered 30 kW power generation system combined Micro Gas Turbine and the Partial Oxdation Solid Oxide Fuel Cell using Gadolinium Doped Ceria as the electrolyte that has high oxide ion conductivity below 600°C. The cylindrical-shaped POSOFC is operated at 572°C recovering turbine exhaust heat of 593°C and accompanying production of hydrogen and carbon monoxide. According to the result of process simulation coupling with SOFC simulation including detailed polarization models, only addition of 16 liter POSOFC can increases the power generation efficiency by 8.5 points at fuel utilization of 80.1%.

AB - Electrochemical partial oxidation (EPOx) of methane can convert exhaust heat into electricity as much as difference between change of Gibbs free energy and change of enthalpy. In this paper, we considered 30 kW power generation system combined Micro Gas Turbine and the Partial Oxdation Solid Oxide Fuel Cell using Gadolinium Doped Ceria as the electrolyte that has high oxide ion conductivity below 600°C. The cylindrical-shaped POSOFC is operated at 572°C recovering turbine exhaust heat of 593°C and accompanying production of hydrogen and carbon monoxide. According to the result of process simulation coupling with SOFC simulation including detailed polarization models, only addition of 16 liter POSOFC can increases the power generation efficiency by 8.5 points at fuel utilization of 80.1%.

KW - Energy conversion

KW - Exergy recuperation

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KW - Solid oxide fuel cell

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