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 593 for “"Energy conversion"”.
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Electrochemical to mechanical energy conversion
… intercalation of graphite can achieve actuation energy densities of 6700 kJ m-3 with strains up to 6.7%. Intercalation oxides provide strains on the order of a couple percent, but allow for increased bandwidth. Using a conventional stacked electrode design, a cell consisting of lithium iron …
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Photothermal energy conversion by plasmonic nanoparticles
Photothermal energy conversion is important when designing optically active devices based on plasmonic nanoparticles. Many early applications of these nanoparticles, like photothermal tumor ablation, drug delivery, and microfluidic devices, depend on the conversion of light to heat. In this …
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Science of Nanofluidics and Energy Conversion
… one is to provide alternative solutions to energy conversion with high efficiency, including energy absorption, actuation and harvesting. In this dissertation, we first report a novel protection mechanism of energy capture through which an intensive impact or blast energy can be effectively …
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Electrostatic vibration-to-electric energy conversion
… capable of electrostatic vibration-to-electric energy conversion at the microwatt level. The fundamental means of en- ergy conversion is a variable capacitor that is excited through a generating energy conversion cycle with every vibration cycle of the converter. This thesis presents a road map …
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Assessment of ocean thermal energy conversion
Ocean thermal energy conversion (OTEC) is a promising renewable energy technology to generate electricity and has other applications such as production of freshwater, seawater air-conditioning, marine culture and chilled-soil agriculture. Previous studies on the technology have focused on promoting …
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Current source based wind energy conversion system
… interfacing converter for a variable-speed wind energy conversion system (WECS) that uses a permanent magnet synchronous generator (PMSG). It has been shown that the proposed current source converter based WECS can operate successfully under maximum power point tracking and meet all grid …
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Nanofluidics: Fundamentals and Applications in Energy Conversion
… that of bulk materials) can lead to a nanoporous energy absorption system (or, composite) of unprecedented performance. Meanwhile, while functional liquids, e.g. electrolytes, are confined inside the nanopores, impressive mechanical-to-electrical and thermal-to-electrical effects have been …
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Solar energy conversion via photovoltaics and photocatalysis
… and ecofriendly chemical processes for the conversion of energy and matter, especially with respect to carbon management, is growing rapidly. Therefore, a search for high-performance solar energy conversion systems to end the current carbon economy era is of paramount importance in both …
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Energy conversion in laminar magnetohydrodynamic channel flow
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1961.
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Enhancing photosynthetic capacity and energy conversion in wheat
Wheat is one of the major grain crops worldwide and provides approximately 20% of the total caloric and protein input for the world’s population. An increase in crop yields is required to meet the demands of the increasing world population in a challenging scenario of less predictable climatic …
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DFIG-Based Split-Shaft Wind Energy Conversion Systems
In this research, a Split-Shaft Wind Energy Conversion System (SS-WECS) is investigated to improve the performance and cost of the system and reduce the wind power uncertainty influences on the power grid. This system utilizes a lightweight Hydraulic Transmission System (HTS) instead of the …
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Fabrication of carbon-based nanomaterials for energy conversion
Nowadays, energy is one of the most important challenges facing mankind due to its supply and demand issues and global warming. Replacing unsustainable energy sources such as fossil fuels is among the most critical issues in the 21st century. Among different solutions for the energy challenges, …
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Nanometer-thick oxide films for pyroelectric energy conversion
Pyroelectric energy conversion utilizes the temperature dependence of spontaneous polarization in crystalline materials to convert waste heat into electricity. High-power-density thermal-to-electrical energy conversion is possible using pyroelectric thin films which allow fast thermal cycling and …
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Ultrasonic synthesis of materials for energy conversion devices
… about the fact that the development of improved energy conversion and storage devices is the biggest issue in the 21st century. A variety of mobile electronics are on the market more than ever, and battery-powered electrical vehicles are no longer a dream. However, the energy conversion and …
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Piezoelectric MEMS for Energy Conversion in Biomedical Devices
… technology, focusing on innovative methods for energy harvesting and vital signs monitoring using miniaturized, micromachined piezoelectric transducers. Specifically, the study designs transducers targeting two primary energy sources: internal mechanical movements of body organs and a safe, …
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Investigation of the PVDF based energy conversion device
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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Thermoelectrics and aerogels for solar energy conversion systems
… about climate change, the world's growing energy needs, and energy independence are driving demand for solar energy conversion technologies. Solar thermal electricity generation has the potential to ll this demand. Solar thermal technology could also be used to displace fossil fuels in …
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Modeling of Small-Scale Wind Energy Conversion Systems
… increasingly being adopted for meeting growing energy needs, their implementation for personal home use in the near future is imminent. There are very few studies conducted on small-scale turbines in the one to two meter diameter range because the power generated at this scale is currently not …
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Solar Energy Conversion and Control Using Organic Photovoltaic Cells
… a current-controlled power converter, and an energy storage device with charging and discharging capabilities.</p>
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