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 77 for “"energy output"”.
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Numerical simulations of experimental results in a power unit to validate the energy output resulting from gas pressurizations on nanoparticles
… a comparison to the potential chemical energy release has been started in order to state if an unconventional source of energy is present. Further experimental suggestions are made to determine some unknowns so that precise calculations of conventional energy release are performed …
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New Methodologies to Generate, Conserve, and Predict, Renewable Energy Output for Season Extension of Warm and Cool Season Vegetable Crops
… for crop production. Historically, most of the energy needs for climate control in tunnel systems have been met via passive heating, with fossil fuels occasionally providing a supplementary heat source. Five heating techniques were examined for kale (Brassica oleracea) and summer squash …
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Simulation of Combustion and Thermal-flow Inside a Pyroscrubber
… the flue gas finally discharged. To maximize the energy recovery and reduce pollutant emission from the pyroscrubber, 3-D computational models are developed using FLUENT to simulate the combustion and thermal-flow phenomena inside the pyroscrubber. The results show the 3-D behavior of the flow, …
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Piezoelectric based energy harvesting on low frequency vibrations of civil infrastructures
Piezoelectric-based energy harvesting is an efficient way to convert ambient vibration energy into usable electric energy. The piezoelectric harvester can work as a sustainable and green power source for different electric devices such as sensors and implanted medical devices. However, its …
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Diffuse flow from hydrothermal vents
… diffuse plume properties, including total heat output. Two distinct sources of hydrothermal flow were detected during the field deployment. The larger source was 1-1 .5km north of the instrument array. and its energy output was 450±270MW. A smaller source was located 100m east of one instrument …
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Tokamak burn phase energy optimization with volumetric and wall interaction effects
The energy output during the burn phase will depend upon the ion temperatures and densities. The ion source rates and the plasma current can be varied to control the ion densities. The impurity concentration of the plasma can be controlled by incorporating a charged particle divertor. A dynamic …
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Stagnation temperature test methods for determining solar collector thermal performance degradation
… existing method which is based on measuring the energy output from the collector. Previous investigations have shown that the existing test method may not be sufficiently sensitive to detect expected changes in material properties, is influenced by the test environment, and is relatively …
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Radial Electric Fields for Improved Tokamak Performance
… radial electric fields on the fusion energy output, energy multiplication, and alpha-particle ash build-up in a TFTR-sized, fusing tokamak plasma is explored. In an idealized tokamak plasma, an externally-imposed radial electric field leads to plasma rotation, but no charge current …
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Movement and energetics of swimming marine mollusks
… Yet, our knowledge of their behavior and energy output in natural environments remains elusive. This key knowledge gap stems from our inability to quantify their positions and movements for appreciable time-scales, and thus we know extremely little about how abundant mollusks that are …
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Microwave enhancement of energetic materials combustion through gas-phase flame interactions
<p>Traditionally, energetic materials’ energy output has been limited to being controlled via formulations and, once an energetic material is manufactured, dynamic change of energy output during combustion is difficult. These limitations are specific to all types of energetic materials, including …
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Econometric assessment of the impact of power sector reforms in Africa: A study of the generation, transmission and distribution sectors
… for installed plant capacity, 3 years for plant energy output, and 7 years for plant utilization. Passage of energy sector law seems likely to enhance both installed generation capacity and actual plant energy output. On the impact of private sector participation (PSP) in the generation sector, …
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Performance optimization of low-to-moderate temperature thermal systems: a multi-pronged investigation
Solar energy plays a vital role for the future of clean energy production due to its availability all year round. To harvest solar energy, solar collectors are used, where they can be classified into categories of concentrating and non-concentrating solar collectors. In this work, both …
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Small-Scale Solar Central Receiver System Design and Analysis
… 120.66° W. The model is used to analyze typical energy output at any time during the year. The power plant is designed to produce an output of 100 kW electrical power, and is supplemented by the combustion of natural gas. Methodologies for determining the proper size and layout of heliostats, …
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First-principles studies of defects in colloidal nanocrystals
Solar energy is one of the few renewable, low-carbon sources with both the maturity and accessibility to meet the ever-increasing global demand for energy. There are also accounting for an increasing percentage of our energy output due to increased adoption in both industrial and residential areas. …
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Implementation and control of distributed maximum power point tracking in solar photovoltaic applications
… photovoltaic (PV) systems as it increases the energy yield from such systems by optimizing their operating point. Current state-of-the-art solutions perform MPPT for a whole system, a string of panels or an individual panel within a PV system. This results in a loss of energy when the optimal …
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Improving reactivity of aluminum-based structural energetic materials
… involving propellants and explosives to improve energy density and overall energy output. A newer application for the use of reactive metals is in warhead casings. Reactive metals provide the ability to boost performance in blast parameters such as peak overpressure and blast impulse. A strong …
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Validation of the use of low enriched uranium as a replacement for highly enriched uranium in US submarine reactors
… a uranium-molybdenum alloy fuel. The required energy output of an attack submarine was used to set the burnup requirement of the HEU (333 MWd/kg) and LEU (93.5 MWd/kg) fueled reactors, and each reactor was depleted to the end of life. The results showed that naval reactors could be switched to …
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An Organic Energy Budget for the New York State Barge Canal
An annual energy budget is presented for the New York State Barge Canal, a first order man-made waterway in western New York. The ecosystem approach, in which all input and output of energy as organic matter are measured, is used to describe the energy flow in an 1130-meter segment of the canal. …
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Simulation of optical impacts of gravity-induced deformations of concentrating solar collectors
… is a large field of interest in the renewable energy sector. However, CSP has not yet become as economical as other renewable energy technologies. A possible solution to this issue is the ability to produce efficient and cost-effective solar collectors such as parabolic troughs, heliostats, and …
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Optimization of enhancements to aluminum-based structural energetic materials
… reduces peak blast pressure and impulse as energy is expended in fracturing the case and accelerating the fragments. In applications where fragmentation is unnecessary or unwanted, warhead energy output can be improved by choosing a case material that reacts in the detonation environment. …
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