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 27 for “"energy penalty"”.
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Process and Reactor Level Simulations of Calcium Looping Combustion
… from coal fired power plants which consumes less energy than other approaches such as oxy-fuel. In the first part of this thesis, a system level model is developed in ASPEN PLUS to calculate the energy penalty of introducing Calcium looping in a coal fired power plant. Several simplifications and …
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Error-suppression by energy-gap protection for quantum computation in open systems
… from noise and decoherence through the use of an energy penalty, recently proposed as a method to suppress error in adiabatic algorithms, is also appealing due to its passiveness. In this thesis, we first introduce the background on quantum computation, and discuss existing efforts towards …
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Carbon dioxide capture by chemical absorption : a solvent comparison study
… growing importance. In the United States, energy related CO₂ emissions accounted for 98% of the total emissions in 2007 with electricity generation accounting for 40% of the total'. Carbon capture and sequestration (CCS) is one of the options that can enable the utilization of fossil fuels …
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Grain size control and microstructural evolution in nanocrystalline Ni-W alloys
… state due to the large presence of high-energy interfaces. Alloying presents a possibility to reduce this energy penalty through solute segregation and thermodynamic stabilization of the grain boundaries. The present work exploits this concept in the nanocrystalline Ni-W system. Atomistic …
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Investigating the bioprotective properties of sugars
… where by the impact sugars have on the free energy of exposure of hydrocarbon groups present within the surfactant micelles was examined. The observation made for sugar-surfactant study was then applied to explain the stabilisation of the native structure and thus the physiologically active …
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Modeling & Optimization of CO2-Mixture Frost Growth as a Carbon Capture Process & Integration with Sequestration
… to achieve high CO2 purity with lower overall energy demand than conventional cryogenic capture approaches. Building on the captured solid CO2, the study introduces a novel dissolution step in which the solid CO2 is converted into a CO2-saturated brine for direct subsurface injection. …
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Development of a 3D Printer for Oxide-free Aluminum Transportation
Hydrogen as an energy carrier is abundant, has a high caloric value and only produces water when combusted. A challenge is directly transporting hydrogen incurs high costs due to its low density. The low flammability limit also makes it dangerous to transport. Aluminum has been proposed as an …
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The economics of future membrane desalination processes and applications
… offers its own distinct challenge. Reductions in energy consumption are key to driving down seawater desalination costs. The optimisation of water treatment in tandem with the formulation of fracturing fluids is key to reducing water management costs and environmental impacts in hydraulic …
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The search for new materials for high-temperature carbon capture and storage
… were subsequently ranked by the theoretical energy penalty associated with their use. The most promising candidates were synthesised and subjected to thermogravimetric and diffraction studies to determine their experimental carbonation behaviour, showing good agreement with the screening …
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From Capture to Storage: Understanding the Viability and Challenges of Carbon Capture and Sequestration Initiatives
… including those outlined by the International Energy Agency (IEA). The baseline model suggests that even under favorable assumptions, CCS permanently sequesters only a small fraction of total global emissions. The economic analysis reveals a slight decrease in total costs, attributed to the …
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A Multifaceted Phenomenon of Hydrophobic Effects: Insights Learned from Nucleation Algorithm Based Computer Simulation Approach
… water. This association is primarily driven by energy originating from the unique situation where small (i.e., two methane molecules) and large (i.e., boundary of the hydrophobic cavity) hydrophobic units come together. For the second subject, hydration thermodynamics for confined spaces between …
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Simulation of Inherent Curvature in Thin Film Rings
… such as surface tension and reactivity create an energy penalty for a surface having unnecessary area. Many processes exist to calculate these surfaces for various scenarios, but the goal of this work is to create a simulation for calculating surfaces that not only try to minimize their area, but …
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Thermodynamics of Ligand Binding to Glutamate Dehydrogenase
… correct amino acid identity, lysine. The free energy penalty for the endogenous NADH ligand binding at the site having the incorrect residue was +5 kcal/mol per binding site. On correcting the sequence error our collaborators noticed improved refinement and electron density of the ligands at …
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A computational investigation of nucleation processes in organic crystals
… is an activated process, meaning that a free energy barrier must be overcome for the transition to take place, and the height of the free energy barrier determines the rate at which the process will occur. Despite considerable advances in both theoretical and experimental techniques to date, …
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Enhancing stability of powder-route nanocrystalline tungsten-titanium via alloy thermodynamics
… of grain boundaries that carry an intrinsic energy penalty, but can be overcome by a consideration of the thermodynamics-based mechanism of interface energy relief via alloying. Suitable alloying conditions can provide a solute segregated grain boundary configuration that enables a …
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Technoeconomic analysis of a steam generation system with carbon capture
… completely eliminate CO2 emissions with a 3.0% energy penalty, much less than comparable systems with carbon capture. The SMR-MR-SG has a capital cost about three times the BS and twice the BSC, but makes up for it quickly with reducing operating costs. Using a conservative prediction of carbon …
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Active Flow Control of Subsonic Flow in an Adverse Pressure Gradient Using Synthetic Jets and Passive Micro Flow Control Devices
… almost all active flow control devices have some energy penalty associated with their inclusion. One potential low penalty approach for enhancing the diffuser performance is to combine the passive flow control elements such as micro-ramps with active flow control devices such as synthetic jets to …
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Electrochemical and Photocatalytic Flow Strategies for Sustainable Substrate Oxidation
… fossil fuels, and the move to a more sustainable energy model, depends on our ability to effectively and economically capture and store renewable forms of energy. Electro- and photocatalytic techniques present an attractive route towards the respective conversion of renewable electricity and …
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Controlling morphology of multi-component block copolymer based materials
… liquid crystalline domains due to the high free energy penalty of disrupting the smectic layering. The final location of the nanoparticles within the composite was determined by the nature of the stabilizing surface coating. The work presented in this thesis revealed a number of interesting tools …
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Influence of Electronic Structure and Lattice Dynamics on Oxygen Ion Transport in Solid-State Ionic Conductors
… as a technological link between renewable energy generation and consumption. Currently, these conductors are limited by slow transport rates and high operational temperatures, which pose challenges and increase costs. Developing faster conductors that operate at lower temperatures requires …
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