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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 21 for “"reactor models"”.
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Heterogenous Nuclear Reactor Models for Optimal Xenon Control
Made available in DSpace on 2017-07-06T18:42:39Z (GMT). No. of bitstreams: 3 Gondal_Ishtiaq_A_PhD.pdf: 62616929 bytes, checksum: 3defdb8dcbf33adbb463fbf1b61eab2f (MD5) Gondal_Ishtiaq_A_PhD_ABS.pdf: 1152852 bytes, checksum: 8315630a9dd7169d3674f0d2ec0d30d1 (MD5) license.txt: 4813 bytes, checksum: …
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Space-Time Kinetics for Homogeneous and Heterogenous Reactor Models
Made available in DSpace on 2017-07-06T18:42:06Z (GMT). No. of bitstreams: 3 Saji_Genn_PhD.pdf: 85636605 bytes, checksum: d9b305b40832f4eb19dfdacc6bb418e4 (MD5) Saji_Genn_PhD_ABS.pdf: 1143000 bytes, checksum: 65dba8ee1f2959e04b50d1e67da2c438 (MD5) license.txt: 4813 bytes, checksum: …
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LEU+ to HALEU nuclear fuel cycle transitions and dynamic reactor models
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Analysis of Batch and Packed Bed Reactor Models for the Carbon-Chloraminereactions
Made available in DSpace on 2014-12-13T19:31:36Z (GMT). No. of bitstreams: 1 7714971.pdf: 4040695 bytes, checksum: f4a23e3d1f7c3e8792b600740a24336a (MD5) Previous issue date: 1977
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Development of a microchannel reactor model
… an on-board fuel processing system. Microchannel reactors have reduced mass and heat transfer limitations and are able to exploit fast intrinsic kinetics. Also, their high surface area to volume ratio reduces their size for a constant throughput, increasing their potential for miniaturised …
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Development of an unsteady state model for the tank bioleaching of sulphide mineral concentrates in flow reactor systems
… it is hypothesized that in bioleaching flow reactor systems, high reaction rate regions exist that can be maintained by application of biological stress trajectories. Reactor models are developed for the purpose of optimising plant operation, understood here as maximising the production rate. …
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Modeling of char oxidation in fluidized bed biomass gasifiers : effects of transport and chemical kinetics
… to liquid fuels. The char that is left in the reactor after devolatilization can be oxidized in order to maximize the amount of biomass carbon that is converted to gaseous carbon and generate heat to drive endothermic gasification reactions. This paper examines the rate of each of the three …
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Stability analysis of spatially dependent nonlinear reactor systems
… criteria for equilibrium states of various reactor feedback models are determined by the methods of Liapunov, semigroup and comparison functions. Comparison of the three approaches are made with respect to applicability to various models as well as computational difficulties associated with …
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Modelling the flow behaviour of gas bubbles in a bubble column
The bubble column reactor is commonly used in industry, although the fluid dynamics inside are not well understood. The challenges associated with solving multi phase flow problems arise from the complexity of the governing equations which have to be solved, which are typically mass, momentum and …
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Flame stabilization and mixing characteristics in a stagnation point reverse flow combustor
… the flame structure is illustrated with simple reactor models. Although reactants are found to burn in a highly preheated (1300 K) and turbulent environment due to mixing with hot product gases, the residence times are sufficiently long compared to the ignition timescales such that the reactants …
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In-core Optimization of Pressurised Water Reactor Reload Design via Multi-objective Tabu Search
Periodically, nuclear Pressurized Water Reactors need to have a proportion of their fuel removed, new fuel added, and the remaining pattern reloaded in such a way as to yield the desired balance of operational considerations. This loading pattern then remains in the reactor until the next reloading …
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Multiscale models of the metalorganic vapor phase epitaxy process
… growing film. In this thesis, new computational models are developed that work on specific length scales, models are linked together, and combined models are used to study the physics of actual deposition processes. A Kinetic Monte Carlo (KMC) model is developed in order to simulate surface …
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Impact of nuclear data libraries for criticality calculation of HTGR
… calculation for High-Temperature Gas-cooled Reactors (HTGR). Accurate nuclear data is essential for reactor safety analysis. However, previous studies have reported significant differences in calculated keff for HTGR systems when different nuclear data libraries are employed. This discrepancy …
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Accelerating Monte Carlo neutron transport with variable fidelity nuclear data
… operations. The method, applied to thermal reactor types, produced a speed-up of up to 15%, and is extremely simple to implement. While a small bias can be introduced in the results, several ways to minimise this have been successfully tested. The second method proposed can accelerate …
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Almacenamiento de energía mediante ciclos termoquímicos de CaO
… sistemas de almacenamiento, como de modelado de reactores (y su validación con resultados a escala de planta piloto) así como estudios cinéticos y de desarrollo de materiales basados en CaO aptos para su uso en estos sistemas de almacenamiento. Dos grandes líneas de investigación, con similitudes …
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Bubbling to turbulent regime transition in a 2D catalytic fluidized bed reactor
… two dimensional (2D) catalytic fluidized bed reactor. Commercial FCC catalyst impregnated with Fe2O3 was used at superficial gas velocities ranging between 0.006 m/s and 0.55 m/s. The onset velocity of the turbulent regime (uc) was determined as 0.4 m/s. The catalyst activity was optimized so …
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Application of chemical kinetic modeling to improve design and performance criteria for a practical incineration system
… thermo-chemical kinetics with networked ideal reactor model were applied to simulate a practical combustion system -the Secondary Combustion Chamber (SCC) of the Rotary Kiln incineration Simulator (RKIS) at the EPA facility at Research Triangle Park, NC. The networked ideal model was developed …
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Neural Model-Based Advanced Control of Chylla-Haase Reactor
… advanced control system for the polymerization reactor (Chylla-Haase) to maintain the high accurate reactor temperature. The first stage of this research start with the development of mathematical model of the process. The sub-models for monomer concentration, polymerization rate, reactor …
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Co-pyrolysis of torrefied biomass and coal : product evaluation and reaction modelling
… co-pyrolysis was conducted in a fixed bed reactor at variable mix ratios (25-75 wt.%), temperatures (400-600 °C) and pressures (1-30 bar) to investigate the extent of secondary- and synergistic reactions. The results showed that during co-pyrolysis, condensation and dehydration reactions of …
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In-situ photocatalytic remediation of organic contaminants in groundwater
… is about the development of a photocatalytic reactor design, Honeycomb, for in-situ groundwater remediation. Photocatalysis, typically a pseudo first order advanced oxidation process, is initiated via the illumination of UVA light on the catalyst, i.e. titanium dioxide (TiO2). In the presence …
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