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 62 for “"Energy Engineering"”.
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Developing a competency model for Hong Kong energy engineers in transition: A mixed methods study
… rise to 1.5 degrees Celsius. Renewable energy has taken the place of traditional fossil fuels in the fight against global warming. World leaders have pledged to take actions in this regard, with President Biden of the United States promising to reduce greenhouse gas emissions by half by …
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Flexible and solution-processed organic thin film transistors for high voltage applications
… solution-processing method based on surface energy engineering was developed with self-assembled monolayers to create pre-patterned organic semiconductor channels without the need for etching.
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Fossil fuel impact of buildings electrification in New York City
… emissions and maximize the efficiency of the energy utilization as well as improve the comfort of the indoor environment.</p> <p>Under the assumption of a cleaner electric grid, this thesis shows that a citywide building electrification will translate into remarkable fossil fuel savings and …
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Exploring the potential of nanofluids to enhance the productivity of solar stills
… Nonetheless, most of these technologies are energy-intensive and driven by fossil fuels which emit greenhouse gases into the atmosphere, thereby contributing to climate change. Additionally, fossil fuels are non-renewable sources of energy and the exhaustion of such reserves can cause a …
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The Measurement & Verification of Energy Conservation Measures at a Coal-fired Power Plant
… the performance changes attributable to specific energy conservation measures from those changes brought about by other factors, or that would have occurred anyway for other reasons. An extensive literature review was undertaken, firstly into M&V and secondly into CFPP design and performance. The …
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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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Heat Transfer and Flow in Solar Energy and Bioenergy Systems
The demand for clean and environmentally benign energy resources has been a great concern in the last two decades. To alleviate the associated environmental problems, reduction of the use of fossil fuels by developing more cost-effective renewable energy technologies becomes more and more …
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The HCCI Fuel Number - Measuring and Describing Auto-ignition for HCCI Combustion Engines
HCCI is an advanced combustion concept, using premixed fuel and air with a diluted charge. This is thermodynamically favorable, leading to high efficiency and therefore lower CO2 emissions. The well-premixed and diluted fuel charge gives lower cylinder temperatures than conventional diesel …
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Direct mixing of geothermal water and condensate into heated groundwater at Nesjavellir power station
… ratio that minimizes scaling while maximizing energy utilization. The research findings suggest that mixes containing condensate water potentially decrease the rate of magnesium silicate scaling in laboratory experiments. This indicates that using condensate water as a component in the mixture …
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Design of an autonomous litter detection and collection system for Icelandic beaches
Litter has become a large-scale problem in today’s world, exacerbated by the widespread use of single-use plastics and the expansion of the fishing industry. Countries like Iceland, with its extensive 5000km coastline, face year-round marine pollution challenges. Current efforts are inadequate due …
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Evaluating energy consumption within Icelandic greenhouses : towards sustainable and efficient vegetable production
This study aims to evaluate the energy usage associated with increasing food production in Iceland in relation to greenhouse agriculture. Electricity and heating in Iceland are primarily sourced from renewable resources. To reach carbon neutrality the country is working towards electrification and …
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Thermo-economic optimation of slim power cycles : a case of Ngozi geothermal project-Tanzania
… country focuses on, aiming at producing clean energy in term of both electricity and heat. The project is an exploration drilling phase. The present study focuses on developing an optimized strategy in terms of wellbore size selection and power plant technology to be used, for the development …
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Numerical modelling of the shallow reinjection and tracer transport at Nesjavellir Geothermal System, Iceland : an assessment of heat transfer and fluid flow
The Nesjavellir geothermal power plant is the second largest in Iceland, with a district heating capacity of 300 MW and electrical generation of 120 MW. Reinjection of the excess water from the Nesjavellir geothermal plant, derived from separated water from high enthalpy wells and condensed steam, …
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Redesign of Power Knee actuator with concern to sound level
Markmið verkefnis er að halda áfram þróun á frumgerðum hljóðlátari Power Knee. Power Knee er mótordrifið gervihné með Harmonic Drive niðurgírunarbúnaði. Í núverandi mynd er gírbúnaður festur beint í mótorhúsið og virkni hnésins auðheyrð öllum í nánasta nágrenni notandans. Í verkefninu verður haldið …
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Investigation of a prototype industrial gas turbine combustor using alternative gaseous fuels
… effect of the RPL was a combination of thermal energy and reactive radicals supplied to the flame zone. The important radicals were shown to be H, O and OH. The emission optimization measurements showed that lowering the equivalence ratio in both the RPL and the pilot minimized the NOX …
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Numerical simulation of multi-scale transport processes and reactions in pem fuel cells using two-phase models
A numerical study for the cathode of a PEM fuel cell has been performed in this study. The results have been limited to cathode only because, in PEM fuel cells, the oxygen reduction reactions, ORRs, are considered the rate limiting reactions and govern the fuel cell performance. The modeling …
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3D conceptual and TOUGH2 modelling of the Waiotapu geothermal field, New Zealand
The Waiotapu geothermal system is a liquid dominated, high-temperature system located in the Taupo Volcanic Zone (TVZ) in the North Island of New Zealand. Seven exploration wells were drilled in Waiotapu in the late 1950s, which are drilled to around 500 m - 1100 m depth. Although Waiotapu has …
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Technical and feasibility study for the San Vicente geothermal power plant project in El Salvador, Central America
The production of electricity from geothermal energy is forecast to continue growing worldwide. The complexity and high investment cost of a geothermal project require experienced professionals from different disciplines to organize, prepare and deliver a successful project. Historically, …
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Environmental and economic analysis of thermal energy storage for a district heating system in Bolungarvik
Even Iceland, which is known for its renewable energy and environmental efforts, is not immune to the current climate crisis or the issue of energy insecurity. The “cold regions”, such as the Westfjords, of Iceland are impacted the most since they lack access to geothermal resources for essential …
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Localizing used cooking oil processing for biodiesel production in Iceland
… abroad—despite possessing abundant renewable energy resources and a national goal of reaching carbon neutrality by 2040. This thesis examines the feasibility of localizing UCO processing for biodiesel within Iceland, comparing lifecycle emissions and economic viability between the current …
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