Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 182 for “"cell performance"”.
-
An Enhanced Transient Solid Oxide Fuel Cell Performance Model
… facilitate the application of solid oxide fuel cells, in conjunction with reduced research and development costs, there is a need for accurate performance models to aid scientists and engineers in component and process design. To this end, an enhanced transient performance model has been …
-
Influence of defects and impurities on solar cell performance
Multicrystalline silicon (mc-Si) solar cells exhibit high impurity content and higher density of crystal defects such as grain boundaries, dislocations, stacking faults and impurity precipitates. Even though the effect of dislocations on mc-Si solar cell performance has been studied, a severe lack …
-
Investigation of Graphite Bipolar Plates for PEM Fuel Cell Performance
The largest cost in manufacturing PEM fuel cells for automotive applications is due to the bipolar plate. The current graphite material used for the bipolar plate is very brittle and difficult to machine to the rigorous specifications needed for fuel cell stacks. This paper introduces the …
-
Modeling of solid oxide fuel cell performance with coal gasification
… coal gasification with solid oxide fuel cells (SOFCs) have been championed by the Department of Energy for the past couple of decades. However, many fundamental questions about this system still need to be addressed by modeling the complex coupling between SOFC's and gasification. More …
-
Interplay of optoelectronic properties and solar cell performance in multidimensional perovskites
… reached 22.7% efficiency to date. Despite its excellent properties such as defect tolerance and long carrier lifetime, the high-performing perovskite material, methylammonium lead iodide (MAPI), which has 3D structure, is still unstable. Recent studies have hinted at the possibility of shifting …
-
Techniques to Characterize Vapor Cell Performance for a Nuclear-Magnetic-Resonance Gyroscope
… performed to improve the procedures for testing performance parameters of vapor cells for a nuclear-magnetic-resonance gyroscope. In addition to summarizing the theoretical infrastructure of the technology, this research resulted in the development and successful implementation of new techniques …
-
Investigation of dye-sensitized solar cell performance with single chirality semiconducting carbon nanotubes
In this work, the performance, electrical transport, and optical properties of dye-sensitized solar cells (DSSCs) assembled with single-walled carbon nanotubes (SWNTs) of a single chirality in the photoanode were investigated. Single-chirality carbon nanotubes (CNTs) allow a selection of band-gap …
-
Experimental Evaluation of the Effect of Inlet Gas Humidification on Fuel Cell Performance
The development and evaluation of a fuel cell test stand incorporating various methods for controlling the temperature and humidity of fuel cell reactants is described. The test stand is capable of accurately metering gas flows, controlling the temperature and humidity of the gases, and delivering …
-
Influence of electrode stress on proton exchange membrane fuel cell performance : experimental characterization and power optimization
… area of a Proton Exchange Membrane (PEM) fuel cell is known to significantly affect power output. In practice, electrode stress arises during operation due to the clamping force that is necessary for sealing the cell. In traditional fuel cell designs, the sealing requirement and the clamping …
-
Investigations into b-o defect formation-dissociation in cz-silicon and their effect on solar cell performance
… share of industrial manufacture of silicon solar cells is taken by single crystalline Czochralski (CZ) grown wafers. The efficiency of solar cells fabricated on boron-doped Czochralski silicon degrades due to the formation of metastable defects when excess electrons are created by illumination or …
-
Enhanced Charge Transport and Cell Performance of an Inverted Organic Solar Cell Via UV-ozone Treatment of ZnO
… of the global energy demand. Silicon based solar cells have dominated the photovoltaic industry but production cost is of major concern. An alternative to silicon solar cells is organic solar cells which are cheaper, lighter, flexible and more applicable to real life situations like low light and …
-
Optimization of gadolinium-doped zinc oxide films for diluted magnetic semiconductor and its effects on organic solar cell performance
… of ferromagnetic Gd-doped ZnO film on device performance was demonstrated by fabricating the Spin-Polarized Organic Solar Cell (Spin-OSC). It was found that the ferromagnetic Zn0.92Gd0.08O film contributed immensely to the performance of OSC. The result showed that the efficiency of Spin-OSC …
-
Study of the relationships between polymer electrolyte membrane fuel cell membrane electrode assembly component manufacturing defects and cell performance, A
Includes bibliographical references (pages 65-68).
-
Effects of Climate and Ecological Processes on Engineered Uranium Disposal Cell Performance with Respect to Nearby Subsistence-Based Indigenous Communities
… natural ecological succession will impact the performance of earthen-engineered covers. Furthermore, there is a dearth of information about how subsistence-dependent Indigenous communities located nearby inactive uranium disposal facilities are impacted by past, present, and future operations …
-
Annealing for intrinsic point-defect control and enhanced solar cell performance : the case of H₂S and tin sulfide (SnS)
… monosulfide (SnS) as a new and promising solar cell absorber material. Out of many other Earth-abundant binary semiconductors, it was selected for study because it has a strong absorption coefficient, high majority carrier mobility, and a promising initial report of a 1.3 % solar cell. Tin …
-
The determination of the effects of physical and chemical parameters on the column flotation cell, performance in the flotation of pyrite
… and chemical parameters on the column flotation cell performance in the flotation of pyrite. Hypotheses are also proposed to explain observed changes. Chapter one gives a brief description of flotation columns, some applications of flotation columns and a literature survey that covers the effects …
-
Computational fluid dynamics modelling of PEM fuel cells to investigate transport limitations.
… emissions. Proton Exchange Membrane (PEM) fuel cell has shown and demonstrated that potential to be a suitable alternative power source because of its simplicity of design, load following capabilities, efficiency, feasibility and quick start-up. Although having these splendid advantages, cost …
Page 1 of 10