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 1180 for “"Photovoltaic"”.
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ORGANIC PHOTOVOLTAIC DEVICE OPTIMIZATION
Polymer based organic photovoltaic (OPV) is making great progress on solar cell performance in the past decade. As a potential alternative to conventional expensive photovoltaic technology, the ability of processing in solution enables OPV technology to be more and more popular in research area as …
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Photovoltaic system deployment optimization
The approach proposed in this paper relates to the concept of solar cell cooling. By tilting the solar cell at an angle to the sun, the heating of the solar cell decreases due to reduced solar irradiance, while the cooling of the solar cell by thermal radiation and convection remains the same, and …
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Silicon nanowires : photovoltaic and thermoelectric applications
Örtækni gegnir þýðingarmiklu og vaxandi hlutverki við nútíma orkuöflun og orkuvinnslu. Markmið þessa verkefnis er að beita örtækni til að framleiða sólarhlöð og varmahlöð (e. thermoelectric cell), byggð á örgrönnum kísilvírum, til orkuvinnslu. Kostir nanóvíra í sólarhlöðum eru m.a. stórt …
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Simulation of concentrated photovoltaic cooling system
… with new fixed-focus facets and an Amonix photovoltaic receiver to replace the Stirling-engine/generator package. As is the case with photovoltaic systems generally, the Amonix cells being used in this application tend to lose efficiency as their temperatures increase. To combat this …
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Photovoltaic Properties of Ferroelectric Thin Films
… thin film materials in term of their photovoltaic properties. The ferroelectric thin films with strong photovoltaic effects are deposited on silicon substrate; hence it opens a new window for integration towards opto-electronic application. The effects of film thickness and light …
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An Investigation of Photovoltaic Power Optimization
… direct conversion on systems that employ photovoltaic (PV) power as an input source. These techniques exhibit dramatic reductions in circuit complexity and power dissipation compared to traditional pure sine-wave inverters. However, designing multilevel DC-to-AC inverter-less systems with …
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Overcoming Efficiency Limits in Photovoltaic Devices
Photovoltaic devices have an efficiency limit of 33% set by fundamental loss processes in the semiconductor materials. The largest loss comes about as a result of charges excited far above the bandgap losing their excess energy as they cool to the bandedge, a process known as thermalisation. …
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Photovoltaic cell efficiency at elevated temperatures
In order to determine what type of photovoltaic solar cell could best be used in a thermoelectric photovoltaic hybrid power generator, we tested the change in efficiency due to higher temperatures of three types of solar cells: a polymer cell, an amorphous silicon cell and a CIS cell. Using an …
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Photovoltaic devices using photosynthetic protein complexes
Photosynthetic proteins have been used as an active material in design of organic solar cells. Traditional organic solar cells have the limitation of not being able to absorb light in the visible-NIR region of the solar spectrum. This region corresponds to over 70% power of the total solar …
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Thermal analysis of a concentrating photovoltaic receiver
… the theoretical and computational analysis for a photovoltaic (PV) receiver for the Science Applications International Corporation (SAIC) dish concentrator. During photovoltaic energy conversion, thermal energy is also generated which results in increases in cell temperature. However, as the cell …
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Direct solar photovoltaic powered reverse osmosis plant
The availability of fresh groundwater in regions with low rainfall in the western parts of South Africa is limited. Especially in regions where sheep farming is prevalent and farms have to be big and thus remote to be profitable. The big and remote nature of these farms means that boreholes on the …
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Digital Twin for Photovoltaic System Maintenance Support
With the continued growth of industrial photovoltaic (PV) installations, the need to maximise plant uptime and operational efficiency has become increasingly important. Reducing downtime through monitoring and predictive maintenance enables earlier fault detection and improved decision-making for …
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Generation dispatch with large-scale photovoltaic systems
There is a widespread adoption of stability strategies that employ power system voltage, rotor angle and frequency control techniques for dealing with the impacts of large-scale PV systems on sub-transmission and transmission power system networks. However, generation dispatch strategy which is …
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Silicon cast wafer recrystallization for photovoltaic applications
… methods of manufacturing silicon wafers for photovoltaic (PV) cells define the electrical properties of the wafer in a first step, and then the geometry of the wafer in a subsequent step. The geometry is typically defined by a combination of grinding and abrasive wire sawing. While mature, …
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Outline systems for photovoltaic data field station
Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2002.
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Accelerating the development of novel photovoltaic materials
… 2°C increase, we must deploy terawatts of solar photovoltaics (PV) and other renewables in the next 10-15 years -- yet, historically novel PV materials have taken decades to go from discovery to commercial relevance. In this thesis, several strategies are outlined for faster screening of novel PV …
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Analytical and experimental investigation of photovoltaic pumping systems
Photovoltaische Pumpensysteme (PVP-Systeme) für die Trinkwasserversorgung und Bewässerung in ländlichen Regionen von Entwicklungsländern sind in letzter Zeit zunehmend in ihrer Aktzeptanz, Verläßlichkeit und Leistungsfähigkeit gestiegen. Sie sind heutzutage einer der bedeutendsten …
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