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 23 for “"Orkuverkfræði"”.
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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
Ngozi geothermal field located in Mbeya Tanzania, is the main geothermal project that the 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 …
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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
Iceland currently exports nearly all of its used cooking oil (UCO) for biodiesel production 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 …
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Structural design of waste-thermoplastic wind turbine blade
Wind turbine blades are unrecyclable at end of life, which has led to the testing of thermoplastics to replace thermosets in the composite; thus making recycling possible. Another challenge, waste plastics of which 55% of all plastics produced in 2015 were discarded into the environment. Utilising …
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A life cycle assessment of energy harvesters in pre-existing European water distribution networks
A significant characteristic of the current global context is the green energy transition. Accordingly, novel sustainable generation techniques such as energy harvesting from kinetic energy are becoming increasingly important. This work, as part of the H-Hope Project, addresses this interest by …
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CFD analysis of heat storage and recovery from geothermal water exiting the space heating radiator using phase change material
Geothermal energy has been widely adopted as an environmentally friendly natural energy resource for electricity generation and direct use applications. Efficient way of utilizing geothermal energy, mainly low enthalpy geothermal fluid, involves cascaded utilization of the hot water for direct use …
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Techno-economic analysis of green ammonia production using offshore wind farms
There is a great potential to reduce CO2 emissions by replacing hydrogen generated from fossil fuels with green hydrogen in ammonia production and replacing fossil fuels in the transportation sector with this green ammonia. The analysis of the current work evaluated a total of 8 different scenarios …
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Material flow analysis of plastic in Iceland : moving towards a circular economy
This research thesis analyzes the flow of plastic materials in Iceland and highlights changes needed to move the current system towards a more circular economy. A circular economy is an economic system that seeks to use materials to their fullest without needing to send them to a landfill and helps …
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Feasibility of the application of the CarbFix method to geothermal power plants globally
Although geothermal energy is considered to be renewable energy, it still emits some amount of polluting gases to the atmosphere. CarbFix is a method where carbon dioxide and hydrogen sulfide are injected into the subsurface, where it has the potential of mineralizing within two years. CarbFix has …
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Feasibility of supercritical CO2 coaxial heat exchanger geothermal well conversion with ECO2G technology
The feasibility of converting non-producing geothermal wells to closed loop supercritical CO2 coaxial heat exchanger using ECO2G technology was analyzed for two heat exchanger scenarios. The first scenario, Case A, utilizes the existing production casing as the heat exchanger and plugs the well at …
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Geothermal energy : silica precipitation and utilization
Silica precipitation experiments have been ongoing at the Reykjanes geothermal power plant, Iceland, since 2011. Silica samples were obtained from the field and thoroughly investigated to estimate the silica’s potential as a marketable product. Targeted applications were studied in detail and the …
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Review of H2S abatement in geothermal plants and laboratory scale design of tray plate distillation tower
Despite having significantly lower emissions in comparison to traditional fossil fuel plants, geothermal power plant emissions can still be substantial. In particular, dissolved non-condensable gases (NCG) such as CO2 and H2S within geothermal fluids have led to increased interest in developing …
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Waste heat recovery from aluminum production
Around half of the energy consumed in aluminum production is lost as waste heat. Approximately 30-45% of the total waste heat is carried away by the exhaust gas from the smelter which is the most easily accessible waste heat stream. Alcoa Fjardaal in east Iceland produces 350 000 tons annually, …
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Phasor Measurement Unit (PMU) : based system for event detection on synchronous generators
Unusual generator events are sometimes seen in the Phasor Measurement Unit (PMU) data in the Icelandic power system, probably due to the small size. The use of PMU data with event detection algorithms, along with modeling, could be a method of capturing these events for analysis. The goals of this …
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Complexity analysis of lumped parameter models : development of complexity reduction algorithm
Lumped parameter models have been shown to be a useful tool for geothermal reservoir analysis and production planning. Tank models are a common form of lumped parameter models, incorporating tanks of given capacitance partially filled with fluid. Between the tanks are connections with given …
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Electrifying Straetó : how to make it happen
The use of electric vehicles in the public transport system of Iceland could contribute to achieve the government´s commitment of reducing CO2 emissions. The aim of this work is to determine the feasibility of converting the current diesel buses into an electric vehicle fleet. The study presents …
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