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 144 for “"thermal behavior"”.
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Static and Dynamic Thermal Behavior of Carbon Based Nanofluids
… (CNT)-ethylene glycol (EG) suspension as thermal management fluids. Three types of CNTs with various degrees of crystallinity and surface energy were prepared using heat-treatment temperature. The thermal conductivity of nanofluids tested at varying concentration from 0% to 1.2% using …
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Modeling of melt pool thermal behavior in laser material
"This dissertation presents a mathematical model which includes most physical phenomena taking place in the laser-material interaction, such as phase changes and the Marangoni effect. Since the melt pool dynamics is primarily driven by the interfacial forces, which in turn rely considerably on the …
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Investigating the thermal behavior differences between beet and cane sugar sources
The melting behavior of sucrose has been well studied over a long period of time. However, one aspect that needed further study was the wide variation in melting temperature reported in the literature for sucrose, as well as other simple sugars (e.g., glucose and fructose). Based on previous work …
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A neural fuzzy approach to modeling the thermal behavior of power transformers
This thesis presents an investigation and a comparative study of four different approaches namely ANSI/IEEE standard models, Adaptive Neuro-Fuzzy Inference System (ANFIS), Multilayer Feedforward Neural Network (MFNN) and Elman Recurrent Neural Network (ERNN) to modeling and prediction of the top …
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Numerical Analysis of Thermal Behavior and Fluid Flow in Geothermal Energy Piles
Geothermal heat exchangers are a growing energy technology that improve the energy efficiency of heating and cooling systems in buildings. Vertical borehole heat exchangers (BHE) coupled with ground source heat pumps have been widely developed and researched in the past century. The major …
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A hybrid battery cell voltage equalizer considering thermal behavior and capacity fade characteristics
The thesis focuses on developing a robust, high-fidelity lithium-ion battery model adaptive to changes in operating temperature, aiming for accurate estimation of state of health (SOH). The thesis proposes two novel methods for lithium-ion battery SOH tracking and estimation using the developed …
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Calcium Phosphate Powders for Biomedical Applications: Synthesis, Thermal Behavior and Non-Conventional Sintering
… as bioceramics, their chemical, structural and thermal characterization, and finally their consolidation into dense compounds by conventional and flash sintering techniques. In the first part, Mg-doped (0 - 2 mol% Mg2+) tricalcium phosphate powders with micrometric size were produced by solid …
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Dynamic thermal behavior of adaptive envelopes with macroencapsulated PCMs: analysis and design methodology
Los edificios son responsables del 34% del consumo final de energía a nivel mundial y del 40% de las emisiones totales de CO₂, principalmente debido al consumo en calefacción y refrigeración. Una estrategia clave para reducir su impacto es mejorar las envolventes, ya que gobiernan el intercambio de …
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Characterizing the Thermal Behavior of Pyrolytic Graphite Sheets (PGS) at Low Interface Pressures
… of the dry interface cooling solution, the thermal interface material (TIM) between the cold plate and iPEBB, was explored in a multitude of ways. First, commercially available TIMs were investigated for their thermal behavior at pressures less than 10 PSI as well as their structural …
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A methodology for characterizing the thermal behavior of internal combustion engine components and systems
A systematic methodology for characterizing the thermal behavior of internal combustion engine components and systems is presented. The approach integrates a thermodynamic-based engine simulation, a finite element model of combustion chamber components in sliding motion, and a resistor-capacitor …
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Comparing the thermal decomposition kinetics of cane and beet sucrose to examine thermal behavior differences
… sucrose from both sources displays different thermal behavior. In their DSC thermal profiles, cane sucrose displays a small endothermic peak (small peak) before the main endothermic peak (large peak), which is not present in beet. The presence of the small peak results in a lower onset …
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Assessment of Thermal Behavior and Development of Thermal Design Guidelines for Integrated Power Electronics Modules
… To address the issue of overheating, thermal management becomes an important mission in the design of the power electronics to ensure the functional power electronics. Different approaches are taken by academia and industry researchers to provide efficient power electronics. In …
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Thermal Behavior of the TN-32B Spent Nuclear Fuel Cask under Storage and Vacuum Drying Conditions
… cask components, manufacturing tolerancing, and thermal expansion. During vacuum drying, the effect of rarefaction at the helium-solid interfaces caused significant temperature increases in the fuel region. This effect is strongly dependent on pressure, gas species, and gap sizes, which are all …
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A Study of the Thermal Behavior of Living Biological Tissue With Application to Thermal Control of Protective Suits
Made available in DSpace on 2014-12-10T22:48:11Z (GMT). No. of bitstreams: 1 7121226.pdf: 7095332 bytes, checksum: 8e5bd3aac945d59e5abd02b0a257caa8 (MD5) Previous issue date: 1971
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Thermal behavior characterization of a sugar-based model system and commercial confections across the stages of sugar cooking
… in the confection industry, are lacking in thermal behavior profile descriptions, which are crucial to confection functionality. Thermal behavior parameters, such as the glass transition temperature (Tg), are indicative of confection material structure and textural behavior. Tg plays an …
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Multivariable analysis of spectral measurements for the characterization of semiconductor processes
… is shown to be useful for characterizing thermal behavior and energy flow in the CMP process. This thesis concludes by proposing a dynamic thermal model for CMP, simulating the thermal behavior using Hspice circuit simulation software, and verifying this model against experimentally …
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Behavior of advanced innovative materials for improved long-term bridge performance
… understanding of the long-term performance and behavior of innovative construction materials. The materials are applied in bridge engineering in order to either enhance the conventional materials or replace them. The dissertation consists of two major parts: structural steel coatings for …
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Dynamic temperature estimation of power electronics systems
… a method for accurate temperature estimation of thermally-aware power electronics systems. The duality between electrical systems and thermal systems was considered for thermal modeling. High dimensional thermal models present a challenge for online estimation. RC (resistor-capacitor) circuits …
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