Sofc thesis


For best results, right-click and select "save as Therefore, low-temperature SOFCs are only possible with higher conductivity electrolytes. They have superior ionic conductivity at lower temperatures, but this comes at the expense of lower thermodynamic stability.

Not all of the solvent evaporates, so the ink maintains some flexibility before it is fired at high temperature to densify it. Hybrid systems involving fuel cells have better efficiencies than conventional power generation systems.

The larger the length, the more reactions can occur and thus the less the activation polarization. The results also show that adding partial electron conductivity to the oxygen ion conducting phase boosts electron conductivity. SOFCs have high operational electrical efficiencies and a thermal output in good agreement with the low temperature regeneration requirement of liquid desiccants.

With the thermodynamic database, capability of calculating other properties of the LSCF perovskite, such as oxygen non-stoichiometry and cation distribution was also demonstrated. The SOFC consisting of brittle ceramic materials can be damaged by the cracking due to high-temperature during the manufacturing and operation.

In the development of ceramic fuel electrodes for SOFC, high performance can only be achieved when a transition metal catalyst is added. David Kennouche joined the Barnett Research Group. An integration analysis, based on empirical data, provides good agreement with the simulations.

Jerren Grimes and Dalton Cox Ph.

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Brookhaven National Laboratory Dr. Experiments were conducted to study the effects of different parameters of the flame as well as the oxidizers being used.

Numerical study of single-chamber solid oxide fuel cells

The fuel-rich diffusion flame, which is located only a few millimeters away from the anode side of the SOFC, is used to reform the fuel and heat the SOFC.

It concluded that the failure of the MT-SOFC occurs mainly because of the residual stress due to the mismatch between the coefficients of thermal expansion of the materials of the electrode assembly, thermal stress will increase the mismatch in some partial areas.

Additionally, a lower temperature requires less insulation and therefore has a lower cost. Barnett Group summer beach party.

Brittle Fracture Studies of Solid Oxide Fuel Cells

Power generation systems with improved performance from low fuel utilizations and low maintenance costs are possible. View the video here. Jason Nicholas, Gareth Hughes August 23, The issue with mechanical engines is that incomplete combustion of gasses can lead to pollution of the atmosphere and is also highly inefficient.

The constant SOFC thermal output can be used to re-concentrate the desiccant solution as a form of thermal energy storage. Alexia Popescu Niles West H.

The implementation of this simple and cost-effective fabrication method may enable significant cost reductions in SOFC fabrication. On the cathode side, an oxidizing gas is either stagnant or forced to pass over the face.

Although the performance is low, the experimental results demonstrate regeneration of a potassium formate desiccant solution using the thermal output from the micro-tubular SOFC in the first of its kind tri-generation system.

During the assembly of stack and normal operation, MT-SOFC is easy to crack under the residual stress induced by manufacture and thermal stress due to multi-physics coupling.

The SOFC would run on the same gasoline or diesel as the engine and would keep the air conditioning unit and other necessary electrical systems running while the engine shuts off when not needed e. Overall tri-generation system performance is more influenced by the SOFC component than the liquid desiccant; and 3 it is primarily the optimisation of the liquid desiccant component that facilitates effective tri-generation system integration and operation.

This can be prevented by having background hydrogen which is calculated below. Sintered samples with. Infiltrated solid oxide fuel cell electrodes help avert this problem, however not much is known about how input variables affect electrode performance.

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This thesis will investigate how two specific input variables affect electrode performance; particle morphology and partial electron conductivity in the oxygen conducting phase.

Solid oxide fuel cell (SOFC) is a promising alternative energy source, with its advantages of high operating efficiency, fuel flexibility, low emissions and relatively low cost. However, there are several challenges concerning the SOFC research.

A thesis submitted to the Faculty and the Board of Trustees of the Colorado School of Mines in partial fulfillment of the requirements for the degree of Master of Science (Engineering).

In this thesis, for catalytic studies, the infiltration procedure has been used to form composites which have greatly simplified the search for the best ceramics for anode applications. In the development of ceramic fuel electrodes for SOFC, high performance can only be achieved when a transition metal catalyst is added.

This thesis focuses on Cr-poisoning in solid oxide fuel cells (SOFC), which currently presents a key challenge for the development of this technology. By the implementation of dedicated experimental tools, this work offers a new access to, and comprehension of, electrochemical performance.


Current and former members of the Alternative Energy Systems Research Group at Colorado School of Mines. Icelandic School for Renewable Energy Science Thesis: Simulation of SOFC-Based Micro-Combined Heat and Power Systems Dynamic Modeling of Solid Oxide Fuel Cell Systems for Commercial Building.

Sofc thesis
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Brittle Fracture Studies of Solid Oxide Fuel Cells