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.
Results
Showing 1 to 20 of 28 for “"thermoelectric energy"”.
-
THERMOELECTRIC ENERGY HARVESTING IN DISPLAYS
The development of a complete thermoelectric generator and its application on a display polarizer film was successfully accomplished in this thesis. A systematic study of the prospective thermoelectric materials, PEDOT:PSS-based and ${ZnON}$, used for the present application is presented. To the …
-
Thermoelectric Energy Harvesting for Sensor Powering
The dissertation solved some critical issues in thermoelectric energy harvesting and tried to broaden the thermoelectric application for energy recovery and sensor powering. The scientific innovations of this dissertation were based on the new advance on thermoelectric material, device …
-
SYNTHESIS AND CHARACTERIZATION OF NANOSTRUCTURED MATERIALS FOR THERMOELECTRIC ENERGY CONVERSION
In 2012, more than 58% of the energy produced in the US was rejected in the form of heat. The rapid development of thermoelectric materials in the past decade has raised new hopes for the possibility of directly converting some of this waste thermal energy back to electricity. However, the large …
-
Nanoscale thermal and thermoelectric energy transport in crystalline and disordered materials
Energy transport provides the fundamental basis for operation of devices from transistors to solar cells. Despite past theories that successfully illustrate the principles behind the energy transport based on solid state physics, the microscopic details of the energy transport are not always clear …
-
Exploring electron and phonon transport at the nanoscale for thermoelectric energy conversion
Thermoelectric materials are capable of solid-state direct heat to electricity energy conversion and are ideal for waste heat recovery applications due to their simplicity, reliability, and lack of environmentally harmful working fluids. Recently, nanostructured thermoelectrics have demonstrated …
-
Thermoelectric Energy Conversion: First-principles Simulations, Energy Harvesting and Deep Cooling Systems
Thermoelectric devices can directly convert heat into electricity and electrical power into cooling or heating without moving parts. The energy conversion efficiency is dominated by the materials’ figure of merit zT, which is linearly proportional to the electrical conductivity, the square of the …
-
Control of Nanoscale Thermal Transport for Thermoelectric Energy Conversion and Thermal Rectification
… in two such application areas, viz., 1) thermoelectric energy conversion and 2) thermal rectification. Using molecular dynamics simulations, several methods for reducing of thermal conductivity in polyaniline and polyacetylene are investigated. The reduction in thermal conductivity leads …
-
Ab initio simulation and optimization of phonon drag effect for lower-temperature thermoelectric energy
… devoted to searching for materials with high thermoelectric (TE) efficiency above room temperature for converting heat into electricity. These efforts have led to significant advances with a record-high zT above 2. However, the pursuit of higher TE performance at lower temperatures for cooling …
-
Thermoelectric Energy Harvesting in Harsh Environments and Laser Additive Manufacturing for Thermoelectric and Electromagnetic Materials
… innovative research at the intersection of thermoelectric solutions, additive manufacturing, and nuclear safety technology, addressing critical challenges in sensor powering for extreme environments, energy harvesting, and materials fabrication. The research is divided into three key areas, …
-
Review of solar thermoelectric energy conversion and analysis of a two cover flat-plate solar collector
The process of solar thermoelectric energy conversion was explored through a review of thermoelectric energy generation and solar collectors. Existing forms of flat plate collectors and solar concentrators were surveyed. A thermal analysis of a common two-cover flat plate solar collector was then …
-
Design and analysis of a thermoelectric energy harvesting system for powering sensing nodes in nuclear power plant
In this work, a thermoelectric energy harvester system aimed at harvesting energy for locally powering sensor nodes in nuclear power plant coolant loops has been designed, fabricated and tested. Different mathematical modeling methods have been validated by comparing with experimental results. The …
-
Experimental study of thermal conductivity reduction of silicon-germanium nanocomposite for thermoelastic application
To improve the thermoelectric energy conversion efficiency of silicon germanium (SiGe), two methods were used to decrease the thermal conductivity by increasing phonon boundary scattering at interfaces. In the first method, SiGe alloys were annealed at a temperature higher than the melting point to …
-
Effects of Ultrathin Interlayers on Thermal Boundary Conductance at Metal-Dielectric Interfaces
… management of numerous technologies such as thermoelectric energy conversion, microelectronics, and plasmonic devices. Understanding the heat transport contributions from the interface is crucial when interfacial resistance forms a significant fraction of the total thermal resistance of the …
-
Thermal properties of nanowires and nanotubes : modeling and experiments
… as lasers, transistors, biosensors, and thermoelectric energy converters. Although the thermal properties of nanowires can differ greatly from their bulk counterparts, the theoretical and experimental understanding of these differences is still limited. Thermal performance is especially …
-
Energy scavenging system for indoor wireless sensor network
… One such method aims to further the sensors energy independence on humans. This technique is known as energy scavenging. The logic behind energy scavenging is to allow the device to have its own reliable source of energy that does not require upkeep, has a long life expectancy, and does not …
-
Thermoelectric properties of polysilicon inverse opals
… a remarkable increase in the gure of merit for thermoelectric energy conversion. Here we theoretically and experimentally(partial) investigate a similar enhancement for polycrystalline silicon structured as an inverse opal. An inverse opal provides nanoscale grains and a thin- lm like geometry …
-
Electrically-tunable near-field heat transfer with ferroelectric materials
… thermal rectifiers, thermophotovoltaic and thermoelectric energy conversion systems. In this thesis, the author explores the tunable optical properties of ferroelectric materials to manipulate the near-field radiative heat transfer between two surfaces, aiming at the active control of …
-
The effect of quantum confinement on the thermoelectric figure of merit
The thermoelectric figure of merit (Z) determines the usefulness of a material for thermoelectric energy conversion applications. Since the 1960's, the best thermoelectric material has been Bi2Te3 alloys, with a ZT of 1.0 at a temperature ofT = 300 K. The advancement of nano-scale technologies has …
Page 1 of 2