• Ceramist
• /
• v.5 no.1
• /
• pp.30-30
• /
• 2002

• Ceramist
• /
• v.13 no.4
• /
• pp.14-20
• /
• 2010

• Ceramist
• /
• v.5 no.4
• /
• pp.90-101
• /
• 2002

• Ceramist
• /
• v.7 no.6
• /
• pp.70-75
• /
• 2004

• Ceramist
• /
• v.7 no.6
• /
• pp.39-41
• /
• 2004

• Patent21
• /
• s.89
• /
• pp.16-24
• /
• 2010

• Journal of the KSME
• /
• v.42 no.2
• /
• pp.42-46
• /
• 2002

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.34 no.2
• /
• pp.157-163
• /
• 2010

Solid oxide fuel cells (SOFCs) are commonly composed of ceramic compartments, and it is known that the physical properties of the ceramic materials can be changed according to the operating temperature. Thus, the physical properties of the ceramic materials have to be properly predicted to develop a highly reliable simulation model. In this study, several physical properties that can affect the performance of SOFCs were selected, and simulation models for those physical properties were developed using our own code. The Gibbs free energy for the open circuit voltage, exchange current densities for the activation polarization, and electrical conductivity for the electrolyte were calculated. In addition, the diffusion coefficient-including the binary and Knudsen diffusion mechanisms-was calculated for mass transport analysis at the porous electrode. The physical property and electrochemical reaction models were then simulated simultaneously. The numerical results were compared with the experimental results and previous works studied by Chan et al. for code validation.

• Journal of the Korean Electrochemical Society
• /
• v.12 no.2
• /
• pp.119-130
• /
• 2009

This article reviews recent R&D trends in SOFC development with an emphasis on industries that can produce the SOFC stack and power generation system. SOFC is an electrochemical device that can convert the chemical energy of fuel into the electrical energy with environment friendly system and high efficiency. SOFC power generation system could be classified as the portable power generation system, auxiliary power unit(APU), residential power generation(RPG) and large size distributed power generation. In the case of more than 10kW system, the major R&D trends are focused on the tubular type SOFC system with high efficient and long term stability to meet the commercialization of SOFC power generation system.

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.34 no.3
• /
• pp.269-274
• /
• 2010

As a preliminary study on a SOFC-GT hybrid system integrated a with coal-gasification system, the influence of the concentrations of $H_2$ and CO in syngas on the performance characteristics of the hybrid system is investigated. It is expected that the differences in the heating values of fuels with different compositions trigger the off-design operation of the gas turbine and result in different performance characteristics of the overall hybrid system. Syngas compositions are found to affect the SOFC performance. Performance of hybrid system with carbon monoxide is poorer than the case with hydrogen. In the case of part-load performance with syngas, performance degradation at part-load operating conditions with hydrogen is more dominant than the case with carbon monoxide.