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 13 of 13 for “"flexible operation"”.
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New techniques for the analysis of flexible operation of gas turbine based systems
… priority due to their relatively low variable operational costs. However, because of their high unpredictability, conventional power plants such as Combined Cycle Power Plants (CCPP) now operate with frequent load changes to fill the gaps in supply by participating in the balancing market. …
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Capacity evaluation and infrastructure planning techniques for heterogeneous railway traffic under structured, mixed, and flexible operation
The student, Mei-Cheng Shih, submitted this Dissertation for approval on 2017-07-12 at 12:06.
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Cost optimization of a solar-powered electrodialysis desalination system
With their autonomous operation and low environmental impact, solar photovoltaics (PV) are an attractive power source for off-grid systems. One application of PV is for powering village-scale desalination systems, which are needed in regions with a saline drinking water supply and an unreliable …
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An integrated furnace co-simulation methodology based on a reduced order CFD approach
… off-design operating conditions, which includes flexible operation. The aims of this study was: to develop a reduced order computational fluid dynamics (CFD) model of the furnace and radiative heat exchangers that captures all the important particulate effects while using a Eulerian-Eulerian (EE) …
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Analysis and design of the modular multilevel converter for secure systems
This thesis investigates the operation, dynamics and design of modular multilevel converters (MMCs) for stable and reliable operation. The internal dynamics and control schemes of the conventional MMC is analysed with consideration of passive component tolerances. Detail qualitative and …
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An Ambulatory Monitoring Algorithm to Unify Diverse E-Textile Garments
… to re-train for different sensor types. This flexible operation is made possible by basing the classifier on an abstract model of the human body that is the same across all sensor types and subject bodies. In order to support low power devices inherent for wearable systems, the algorithm …
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Regulatory and technical barriers to wind energy integration in northeast China
… in grid integration challenges because of the inflexible operation of coal plants relative to natural gas and hydropower, and the "must-run" nature of cogeneration units supplying residential heat. A competing set of hypotheses to explain current rates of wind spillage focus on institutional …
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Design, development, and field-testing of a cost-optimized village-scale, photovoltaic-powered, electrodialysis reversal water desalination system for rural India
… additional cost reduction that was enabled by a flexible operation schedule since the lower membrane cost optimized system would operate on average for 8.6 hours per day instead of 17.7. A pilot PV-EDR system was built and installed in the village of Chelluru in India, where a week-long trial was …
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Time-variant solar-powered electrodialysis reversal desalination for affordable off-grid clean water supply
… the solar power profile and accommodate the inflexible power profile of the desalination load in constant operation. To reduce water cost, a novel, flexible operational strategy for PV-EDR systems is presented and experimentally validated on a full-scale pilot. By actively controlling voltage …
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Energy Systems Analysis for a Solar Economy
… suggest two alternative processing options: 1) flexible operation between low and high carbon recovery modes, or 2) adapting a novel energy storage concept based on the cyclic transformation between liquid carbon dioxide and a liquid carbon molecule for round the clock augmented biofuel …
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Production of biofuels in a circular cascading bio-based energy system
… systems (CO2 + 4H2 → CH4 + 2H2O) facing flexible operation conditions due to intermittent gas injection. The variability in gas supply would be caused by green hydrogen production associated with variable renewable electricity. In the second experimental work CO2 biomethanation was …
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Optimal design and operation of energy polygeneration systems
… NPV than comparable single-product plants. The flexible operation is then considered for the energy polygeneration system. In real applications, product prices can fluctuate significantly seasonally or even daily. The profitability of the polygeneration system can potentially be increased if …
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Silicon Photonics for All-Optical Processing and High-Bandwidth-Density Interconnects
… both single-channel aspects as well as WDM-operation-related considerations which are unique for a microring physical characteristics. The holistic analysis for the full link captures the wavelength-channel-spacing dependent characteristics, provides some methodologies for device design in …