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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Natural resources and sustainable energy : Growth rates and resource flows for low-carbon systems

Davidsson, Simon January 2016 (has links)
Large-scale deployment of low-carbon energy technologies is important for counteracting anthropogenic climate change and achieving universal energy access. This thesis explores potential growth rates of technologies necessary to reach a more sustainable global energy system, the material and energy flows required to commission these technologies, and potential future availability of the required resources. These issues are investigated in five papers. Potential future growth rates of wind energy and solar photovoltaics, and the associated material requirements are explored, taking the expected service life of these technologies into account. Methodology for assessing net energy return and natural resource use for wind energy systems are analyzed. Potential future availability of lithium and phosphate rock are also investigated. Estimates of energy and materials required for technologies such as wind energy and photovoltaics vary, and depend on the assumptions made and methods used. Still, it is clear that commissioning of low-carbon technologies on the scale required to reach and sustain a low-carbon energy system in coming decades requires significant quantities of both bulk materials and scarcer resources. For some technologies, such as thin film solar cells and electric vehicles with lithium-ion batteries, availability of materials could become an issue for potential growth rates. Future phosphate rock production could become highly dependent on few countries, and potential political, social and environmental aspects of this should be investigated in more detail. Material and energy flows should be considered when analyzing growth rates of low-carbon technologies. Their estimated service life can indicate sustainable growth rates of technologies, as well as when materials are available for end-of-life recycling. Resource constrained growth curve models can be used to explore future production of natural resources. A higher disaggregation of these models can enable more detailed analysis of potential constraints. This thesis contributes to the discussion on how to create a more sustainable global energy system, but the methods to assess current and future energy and material flows, and availability of natural resources, should be further developed in the future.
12

Creating Social Value of Energy at the Grassroots: Investigating the Energy-Poverty Nexus and Co-Producing Solutions for Energy Thriving

January 2020 (has links)
abstract: Energy projects have the potential to provide critical services for human well-being and help eradicate poverty. However, too many projects fail because their approach oversimplifies the problem to energy poverty: viewing it as a narrow problem of access to energy services and technologies. This thesis presents an alternative paradigm for energy project development, grounded in theories of socio-energy systems, recognizing that energy and poverty coexist as a social, economic, and technological problem. First, it shows that social, economic, and energy insecurity creates a complex energy-poverty nexus, undermining equitable, fair, and sustainable energy futures in marginalized communities. Indirect and access-based measures of energy poverty are a mismatch for the complexity of the energy-poverty nexus. The thesis, using the concept of social value of energy, develops a methodology for systematically mapping benefits, burdens and externalities of the energy system, illustrated using empirical investigations in communities in Nepal, India, Brazil, and Philippines. The thesis argues that key determinants of the energy-poverty nexus are the functional and economic capabilities of users, stressors and resulting thresholds of capabilities characterizing the energy and poverty relationship. It proposes ‘energy thriving’ as an alternative standard for evaluating project outcomes, requiring energy systems to not only remedy human well-being deficits but create enabling conditions for discovering higher forms of well-being. Second, a novel, experimental approach to sustainability interventions is developed, to improve the outcomes of energy projects. The thesis presents results from a test bed for community sustainability interventions established in the village of Rio Claro in Brazil, to test innovative project design strategies and develop a primer for co-producing sustainable solutions. The Sustainable Rio Claro 2020 initiative served as a longitudinal experiment in participatory collective action for sustainable futures. Finally, results are discussed from a collaborative project with grassroots practitioners to understand the energy-poverty nexus, map the social value of energy and develop energy thriving solutions. Partnering with local private and non-profit organizations in Uganda, Bolivia, Nepal and Philippines, the project evaluated and refined methods for designing and implementing innovative energy projects using the theoretical ideas developed in the thesis, subsequently developing a practitioner toolkit for the purpose. / Dissertation/Thesis / Doctoral Dissertation Sustainability 2020
13

Shifting powers, prospects and perspectives? : A critical reading of the European Union’s geopolitical reasoning on critical raw materials

Sztankovics, Linda January 2021 (has links)
Global energy transitions and rises in demand for critical raw materials (CRMs) are predicted to reshape global politics in yet uncertain but profound ways. With CRMs being vital for Europe’s decarbonization process, the present study sets out to examine the EU’s geopolitical discourse by taking an inquisitive yet critical stance focusing particularly on the new “geopolitical” Commission’s geopolitical reasoning on CRMs. Building upon critical geopolitics, a discourse analysis was conducted on 9 European Commission communications (2019–2020). Three key observations were made: first, a ‘geopolitical’ and ‘assertive’ EU is crucial in an increasingly ‘fragile’, ‘polarized’ and ‘competitive’ world. Second, securing CRMs is a ‘security question’, requiring ‘strategic approaches and partnerships’, notably with ‘resource–rich regions’ and particularly with Africa. Third, the EU’s narrative is ambiguous. While classical geopolitical assumptions are distinguishable, it remains questionable whether the EU will depart from its familiar path of liberal cooperation, multilateralism and trade when scouting for CRMs, although its role as a “benign ally” can be questioned. Further studies on the EU’s geopolitical reasoning, along with its actual practice in the area of CRMs, are warranted. Likewise, a critical reading of reports and foresight preceding EU policymaking is encouraged, to better comprehend how the EU’s dominating geopolitical discourse on CRMs and subsequent practice is produced in the first place.

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