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.
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Showing 1 to 20 of 104 for “"thermodynamic model"”.
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A transient fluid and thermodynamic model of a compressed air system
… prompts an inquisitive auditor to dynamically model a compressed air system. While the current compressed air software tools are useful for modeling systems with an electrical analysis, a potential exists to develop a modeling tool with a sound physics and thermodynamics based approach. This …
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A computer-simulation-based molecular-thermodynamic model for shape-based screening of peptide amphiphile micelles in vaccines
… detailed all-atom simulations are necessary to model the aggregation behavior. To accommodate these criteria, computer-simulation-inspired molecular thermodynamic models exploit atomic resolution information derived from molecular dynamics simulations for estimating their parameters. Within …
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Development and validation of a thermodynamic model for predicting mode transitions in falling film flows over horizontal tubes
… based on the rate equation for the balance of thermodynamic availability. Expressions are developed for the main components of availability (kinetic, potential, and surface energies) of the three main falling-film modes. The thermodynamic model is then applied to predict the transitional …
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Developing a thermodynamic model for the U-Pd-Rh-Ru quaternary system for use in the modelling of nuclear fuel
… binary phase diagram constructions and thermodynamic property determinations. To model the behaviour of fission products in irradiated nuclear fuels, codes (e.g., BISON or RNFTT (RMC Nuclear Fuel Thermochemical Treatment) have been developed. For quantitative studies, existing …
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The Development of a Thermodynamic Model for Antisense RNA Design and an Electro-transformation Protocol to Introduce Auxotrophic Genes for Enhancing Eicosapentaenoic Acid Yield from Pythium irregulare
… in this organism. An antisense RNA (asRNA) thermodynamic model was developed to design new asRNA constructs capable of fine-tuning gene expression knockdown. The asRNA technology is now identified as an effective and specific method for regulating microbial gene expression at the …
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Binary gas adsorption on molecular sieves. Experimental data for the adsorption of oxygen, nitrogen and oxygen-nitrogen mixtures on five molecular sieve adsorbents at various temperatures and pressures and a comparison with theoretical models.
… isotherms has been attempted using the kinetic model of Gonzalez and Holland, the vacancy solution model, the statistical thermodynamic model and a mathematical equation similar to the Hill-de Boer model. With the exception of the kinetic model, good curve fitting was obtained. Binary equilibria …
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Electrolytic extraction of a metal from its metal compound: estimates of optimal energy requirements and their consequences
… carbon emission mitigation. We first develop a thermodynamic model that establishes the technical criteria for the most efficient operation of an electrolytic cell for a variety of metals. Second, we explore the rigidity of the operating boundary conditions and their impact on energy …
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The Effect of Hydrogen on The Microstructure of Silicon-Carbide
… atmospheres. These results were compared with a thermodynamic model which was constructed using a free energy minimization technique.
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The Effect of Co on the Deformation Response of Fe-Mn Alloys
… on the Fe-Mn system in terms of its effect on thermodynamic properties, phase composition, deformation induced phase transformation, and mechanical properties. Using a thermodynamic model, three alloys of varying Co concentration with a fixed Fe:Mn ratio of 4 were selected for study to …
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Development of a biomass gasification pre-treatment system
… on the gasifier performance. This required a thermodynamic model to be developed in order to assess the effect of drying as was highlighted in the literature survey. A heat exchanger model was also developed which formed the basis for the design of the drier. The project aim was to develop a …
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ADVANCED HIGH STRENGTH STEEL THROUGH PARAEQUILIBRIUM CARBON PARTITIONING AND AUSTENITE STABILIZATION
… partitioning temperatures above 450¿¿C. A thermodynamic model predicted the retained austenite contents in steels with different chemical compositions and heat treatment schedules. The microstructure and mechanical behavior of two heat-treated steels with the same level of retained …
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Electrically induced antiferroelectric-ferroelectric phase transformations in lead-zirconate titanate stannate ceramics
… behavior for actuator applications. A thermodynamic model is proposed to account for the thermal stability of the field-induced transformation characteristics, including reversible and irreversible phenomena. Results are interpreted in terms of thermodynamic relations, and are shown to …
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Analysis of novel, above-ground thermal energy storage concept utilizing low-cost, solid medium
… uses inexpensive rock as the storage medium. A thermodynamic model was created to verify the technical feasibility of the proposed system, and economic factors were considered. Granite, limestone, sandstone, and slate were determined to be practical mediums. Further research is necessary to …
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Feasibility of supercritical CO2 coaxial heat exchanger geothermal well conversion with ECO2G technology
… to use as the heat exchanger. A spreadsheet thermodynamic model discretized the depth of the well to model the heat flow, temperature and pressure of the sCO2, and electricity production of each heat exchanger. With the electricity production, the NPV and IRR of Case A and Case B were …
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Effect of heat treatment on the mechanical and corrosion properties of the CoCrNiFeAl HEAs
… as their electrochemical corrosion behavior. A thermodynamic model was implemented to predict the performance of the material. The results of this study provide a good insight into the potential of CoCrNiFeAl HEAs to be employed in different applications, as the heat treatment improved the …
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Thermodynamic analysis of airport snow melting systems and feasibility assessment of low-emission alternatives
… a feasibility study and developed a transient thermodynamic model via Python based on the widely used submerged combustion industrial snow melter design. Case studies at two Canadian airports using historical climate data quantified seasonal environmental and economic impacts of these airports' …
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Three-dimensional defect characterization : focused ion beam tomography applied to tin sulfide thin films
… nucleation theory and develop two different models: (a) a thermodynamic model that assumes pores form primarily from an effect known as "self-shadowing," whereby growth-rate anisotropy results in some grains that grow faster than their neighbors, and (b) a kinetic model that assumes a …
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Electron Transfer on the Donor and Acceptor Sides of Photosystem II Explored by Site-Directed Mutagenesis and Kinetic Spectroscopy
… became the important tools to investigate a new model of neutral tyrosine radical, $\rm Y\sb{Z}\sp\cdot,$ introduced by Gilchrist et al. (1995) and Hoganson et al. (1995). In this new model, $\rm Y\sb{Z}$ is not simply a redox active residue in the electron transfer reactions, but is also …
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Atmospheric Carbon Capture: A Review on Current Technologies and Analysis of Energy Consumption for Various Direct Air Capture (DAC) Systems
… precooler is examined. In this novel approach, a thermodynamic model based on psychrometric theories is evaluated to determine the required work input of the system at various inlet compression ratios and various inlet temperatures. Turbine recovery is also considered for the potential to capture …
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Prediction of electrolyte solution properties using a combined Debye-Huckel, association and solvation model
This paper presents a semi-theoretical computer model that estimates individual and mean ionic activity coefficients in the NaCl-NaOH-HCl-H₂O system at 25°C. This extra thermodynamic model incorporates long-range electrostatic ion-ion interaction (Debye- Hückel effects), short-range ion-ion …
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