Electrical Performance and Carbon Deposition Differences between the Bi-Layer Interconnector and Conventional Straight Interconnector Solid Oxide Fuel Cell

Abstract

Carbon deposition considered in a solid oxide fuel cell (SOFC) model may be influenced by the operating voltage, inlet water/methane ratio, working temperature and pressure, inlet molar fraction of fuel and so on. The effects of these parameters in a planar SOFC implementing a novel bi-layer interconnector are not well understood. This paper is focused on the numerical study of carbon deposition and electrical performance of a bi-layer interconnector planar SOFC. The results illustrate that the electrical performance of the bi-layer interconnector SOFC is 11% higher than that of the conventional straight interconnector SOFC with initial state. After 120 days of operation, the electrical performance of the bi-layer interconnector SOFC has a slight decrease and more carbon deposit because of the increased electrochemical reaction rate. However, these differences minimize if higher operating voltages are involved.

Single-Cell Tests to Explore the Reliability of Sofc Installations Operating Offshore

“…Yan et al [9] modelled numerically degradation of the performance of solid oxide fuel cells due to carbon deposition. They found that the bilayer interconnect that they were testing was more robust under carbon deposition than a conventional interconnect, and that the performance of the cell only degraded slightly due to carbon deposition.…”

A Simple Expression for the Tortuosity of Gas Transport Paths in Solid Oxide Fuel Cells’ Porous Electrodes

“…Consequently, the proposed tortuosity expression might be helpful for the optimization electrode microstructure to reduce the concentration polarization and further improve SOFC performance. Cross-section of the first typical path S 2 Cross-section of the second typical path S t Total cross section area of the tortuous paths N Molar flux c up pc bot q Molar concentration of gas at the top (bottom) surface of representative volume element…”

“…In recent years, significant strides have been made in improving SOFC performance [1][2][3]. In other words, for a given operating voltage, the output current density has been increased drastically.…”

Optimization of the Heating Element in a Gas-Gas Heater Using an Integrated Analysis Model

“…Energies 2017, 10,1932 10 of 20 moisture and cold gas. For a more specific analysis, cross sections of the middle span of the rotor are shown, such as A to A and B to B.…”

“…Frequent component replacement, owing to pressure drop in the GGH, is caused by plugging and fouling and makes it difficult to operate the power plant. Many related studies have been investigated to avoid the plugging phenomenon, and attempts have been made to reduce plugging by periodically operating a soot blower that uses steam or air in an effective manner [10,11]. However, recently, a case was reported in which the heating element was broken by the strong pressure of the steam or air of the soot blower.…”