Numerical Analysis of Basic Electrical and Thermal Characteristics of Planar Solid Oxide Fuel Cell.

Inui, Yoshitaka; Suto, Tetsuo; Murata, Masanori

doi:10.1541/ieejpes.123.68

Cited by 15 publications

(8 citation statements)

References 3 publications

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“…The details of the analytical method in the code have been described in prior papers [3,4], and so a brief outline will be given below, and the interested reader may refer to the papers as desired.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, the time constant for the transient changes in the electrical distributions is about 1 to 10 ms [1]. Compared to these time constants, the time constant for the transient changes in the temperature distribution in the solid areas is rather long at over 10 minutes [3]. Thus, in the analysis code only the temperature distribution for the solid areas, this having the longest time constant for transient changes, is used as a time-dependent calculation, and the other distributions are assumed to reach a steady state at all times.…”

Section: Assumptions In the Analysismentioning

confidence: 99%

“…The formulas used to calculate the physical values for the structural elements and the conductivity, and the heat transfer coefficients and activation overvoltage used in the analyses can be found in Ref. 3.…”

Section: Analytical Conditionsmentioning

confidence: 99%

“…Previously, the authors have developed mathematical analysis code for the electrical and thermal properties of a cell and used it to perform mathematical simulations of cell performance for the purpose of creating the policy to improve performance by optimizing the gas supply method and operating conditions for a planar SOFC [3]. In a prior paper [4], the authors developed mathematical analysis code to analyze a single cell plate, and then described the cross-flow-type cell performance and the effect on cell performance of heat exchange due to radiation from the cell side and nonuniformity in the amount of gas supplied.…”

Section: Introductionmentioning

confidence: 99%

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Fundamental study on variable load operation of planar solid oxide fuel cell

Inui

Ito

Nakajima

et al. 2006

Electrical Engineering Japan

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SUMMARYThe solid oxide fuel cell (SOFC) has a problem in durability of the ceramics used as its cell materials, because its operating temperature is very high and cell temperature fluctuation induces thermal stress to the ceramics. The cell temperature distribution in the SOFC, therefore, should be kept as constant as possible during the variable load operation through the control of the average current density in the cell. Considering this fact, the authors investigate the relation between the average current density and the temperature distribution in the co-flow-and counter-flow-type planar SOFC single cells by numerical simulations. In the calculations, the fuel utilization is kept constant and the air utilization is selected as the controllable variable. It is made clear that the change of the temperature distribution can be suppressed to a sufficiently low level and the variable load operation can be realized for both types of cells by properly regulating the air utilization.

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Section: Methodsmentioning

confidence: 99%

Section: Assumptions In the Analysismentioning

confidence: 99%

Section: Analytical Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fundamental study on variable load operation of planar solid oxide fuel cell

Inui

Ito

Nakajima

et al. 2006

Electrical Engineering Japan

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“…Detailed description of the analysis code and values of physical parameters can be found in Ref. 10.…”

Section: Specifications and Performance Characteristics Of The Sofc Smentioning

confidence: 99%

Combined carbon‐dioxide‐capturing high‐performance power generation system using a solid oxide fuel cell operating on pressurized fuel/air

Inui¹,

Ishida²,

Matsumae³

2004

Electrical Engineering Japan

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The authors recently proposed a high‐performance combined carbon‐dioxide‐capturing power generation system using a solid oxide fuel cell (SOFC) and a closed‐cycle MHD generator, in which pure oxygen is used as the oxidant. This combined system makes the best use of the advantages of combustion with pure oxygen but fails to prevent the efficiency deterioration caused by high power demand for oxygen production. In the present study, the authors modified this previous system and proposed an improved combined carbon‐dioxide‐capturing power generation system using SOFC/MHD characterized by a higher overall thermal efficiency. In this system, pure oxygen is supplied only to the combustor to reduce the power required for the oxygen production, and pressurized air is used as the oxidant gas in the SOFC. The power saving amounts to about 5% of the thermal input, resulting in a very high total thermal efficiency of 67.53% (HHV) or 74.94% (LHV), which is considered to be the highest possible value of the overall thermal efficiency of carbon‐dioxide‐capturing systems. Advantages of the proposed system suggest that it is advisable to continue further research in this direction. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 149(4): 21–30, 2004; Published online in Wiley InterScience (http://www.interscience.wiley.com). DOI 10.1002/eej.20010

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