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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.
81

Från el till värme : en diskursanalytisk policystudie av energiomställning på statlig, kommunal och hushållsnivå

Perman, Karin January 2008 (has links)
The aim of this thesis is to analyse how space heating for single-family houses, and energy system conversion has been constructed and discussed at national, municipal and household levels. Political documents have been studied, and interviews have been carried out with politicians, civil servants and householders in the municipality of Falun. In order to study and analyse similarities and differences between these three political levels, the following main questions were asked: In which sense is the use of electrical heating formulated as problematic? How are the causes of these problems presented, and which solutions are suggested? What are the effects of how problems, causes and solutions are constructed? At the national level, the use of electricity produced by nuclear power was considered a problem. Initially the municipality’s policy documents present the same problem, but there is a change of focus to the problem of imported electricity produced by fossil fuel, and the resulting emissions. At household level, the problem was often an old and badly functioning space-heating system. But some households did not formulate a problem before they converted. Instead they were influenced by their neighbours and thereby convinced. At all three political levels, there is consensus on the households’ responsibility concerning energy transition. While industry tends to be considered incapable of cutting down its energy consumption, households are expected to take the responsibility seriously. Furthermore, within the household, the heating system tends to be constructed as a predominantly male concern. At all three levels, households are perceived as dependant on economical subsidies when taking the decision to convert from electrical heating. Although it is interesting that the interviewed householders only apply this view to others than themselves. They are convinced that other households need subsidies to act in an environmentally correct way. The discourse concerning the Swedish energy transition illustrates a shift away from a definition of ecological modernisation where environmental considerations influence economic development. The thesis clearly shows how economic arguments repeatedly influence environmental concerns. However, the tension between the two is played down and concealed through the lack of problematisation of the responsibility of industry, and through the focus on the need for education and future opportunities. Political dialogues concerning the use of electrical heating and the conversion of energy systems towards more renewable energies are dominated by economic arguments at the three levels. One effect of this is an assumption that energy policy instruments such as information and economic subsidies are essential for the energy transition. However, if householders rather are influenced by their neighbours should the government use economic subsidy as the main energy policy instrument?
82

Renewable Energy Transition: Dynamic Systems Analysis, Policy Scenarios, and Trade-offs for the State of Vermont

Clement, Christopher Ernest 01 January 2016 (has links)
There is broad consensus that a transition to renewable energy and a low-carbon economy is crucial for future development and prosperity, yet there are differing perspectives on how such a transition should be achieved. The overarching goal of this dissertation, which is comprised of three interrelated studies, is to analyze and compare energy futures scenarios to achieve a renewable energy transition and low-carbon economy in the State of Vermont. In the first study, an analysis is presented of the role of energy pricing regimes and economic policy in the context of pursuing a renewable energy transition in the State of Vermont. Through the development and application of a system dynamics model, results address the limits to technological substitution due to path dependence on nonrenewable energy. The role of complementary economic policy is also highlighted to shift from a goal of quantitative growth to qualitative development in order to decouple economic welfare from energy consumption. In the second study, an analysis is presented of the impact of modeled energy transition scenarios to address energy development and land use trade-offs. Simulations with a spatio-temporal land cover change model find that Vermont could achieve a complete transition to renewable electricity using in-state resources through developing between 11,000 and 100,000 hectares of land for solar and wind, or up to four percent of state land area, including some environmentally sensitive land. This approach highlights the need for integration of energy policy and land use planning in order to mitigate potential energy-land use conflict. In the final study, trade-offs between energy, economic, environmental, and social dimensions of Vermont's renewable energy transition are explored through the use of a multi-criteria decision analysis. Energy transition alternatives were designed to reveal trade-offs at the intersection of economic growth and carbon price policy. While there were no optimal pathways to achieving Vermont's energy transition, some energy transition alternatives achieve a more socially desirable balance of benefits and consequences. Navigating the trade-offs inherent in the ongoing energy transition will require an adaptive approach to policymaking that incorporates iterative planning, experimentation, and learning.
83

Modelos de transição energética residencial e o acesso a serviços energéticos limpos: uma análise a partir de dois estudos de caso / Residential energy transition models and the access to clean energy services: an analysis based on two case studies

Sgarbi, Felipe de Albuquerque 02 August 2013 (has links)
A transição energética residencial começou a receber especial atenção da comunidade científica nos anos 1970 e 1980, quando se acreditava na ocorrência iminente da Crise da Lenha. Na época, temia-se que o corrente ritmo de consumo de biomassas sólidas em países em desenvolvimento ultrapassaria a capacidade de produção primária dos ambientes naturais, com sérias consequências para as camadas menos abastadas da população destes locais, que se veriam em uma situação de escassez de fontes de energia. Apesar de esta crise nunca haver, de fato, se concretizado, a preocupação com a sua potencial ocorrência estimulou o desenvolvimento de modelos que visavam à interpretação do fenômeno da transição energética residencial decorrente do processo de urbanização e aumento de renda dos usuários finais. Tal interesse culminou na elaboração do modelo da Escada Energética que, de uma maneira geral, previa que o abandono de fontes de energia tradicionais e a adoção de fontes de energia modernas era o resultado do aumento do status social da população. Inicialmente, a Escada Energética se estabeleceu como principal modelo de transição energética residencial. À medida que novos estudos foram desenvolvidos, entretanto, evidências passaram a sugerir que diversos fatores envolvidos na transição energética em países em desenvolvimento não podiam ser explicados pelo modelo. Estas evidências subsidiaram a concepção do modelo do Acúmulo de Combustíveis, segundo o qual a diversificação, e não a substituição, de energéticos seria o resultado do desenvolvimento social da população. Atualmente, não existe consenso sobre qual modelo melhor reflete o fenômeno da transição energética residencial. Como consequência, políticas públicas de acesso a energia e serviços energéticos limpos baseadas nestas diferentes interpretações possuem características e resultados distintos. Neste contexto, o presente trabalho pretende contribuir para a discussão sobre qual modelo de transição energética melhor reflete a realidade dos consumidores residenciais de energia de países em desenvolvimento a partir da apresentação de dois estudos de caso que retratam diferentes facetas da questão. As análises elaboradas indicam que o modelo do Acúmulo de Combustíveis consegue representar com maior fidelidade o fenômeno da transição energética residencial e que políticas públicas estruturadas segundo seu arcabouço teórico podem contribuir mais eficazmente para a melhoria das condições de vida da população. / The residential energy transition began to receive special attention from the scientific community in 70s and 80s, when a Fuelwood crisis was believed to be imminent. At the time, it was feared that the current rhythm of solid biomass consumption would not keep pace with the primary productivity of the forests and other sources of fuelwood, with severe consequences striking the least wealthy households, who would face an energy shortage. Although the referred crisis never really happened, the concern with its potential occurrence stimulated the development of models aiming at interpreting the energy transition phenomenon provoked by the urbanization process and the increase in income of households. Such interest culminated in the elaboration of the Energy Ladder model, which indicated that the abandonment of traditional energy sources and the adoption of modern ones was the result of the increase of the social status of the population. Initially, the Energy Ladder established itself as the main residential energy transition model. As new studies were being developed, however, evidences suggesting that different factors related to the energy transition in developing countries couldnt be explained by the model were found. These evidences supported the conception of the Fuel Staking model, according to which diversification, instead of substitution, resulted from the social development of the population. Currently, there is no consensus on which model better represents the residential energy transition. As a consequence, public policies focused on clean energy and energy services access based on these different interpretations have different characteristics and results. In such context, this work intends to contribute to the discussion on which energy transition model better reflects the reality of households in developing countries by presenting two case studies showing different aspects of the thematic. The analysis presented suggests that the Fuel Stacking model can better represent the residential energy transition phenomenon and that public policies structured according to its theoretical framework are more effective in contributing to increase the living standards of the population.
84

Business model transformation influenced by Germany's Energiewende : a comparative case study analysis of business model innovation in start-up and incumbent firms

Hoffmann, Sven Oliver January 2016 (has links)
This thesis investigates the performance of business model innovation (BMI) by incumbent power utility and clean-tech start-up firms influenced by the German Energiewende. It emphasises the factors that impact BMI from a managers’ perspective, examines success factors for managers to overcome BMI challenges, and addresses contingencies to perform BMI in a more structured way. The research is driven by the German Energiewende. It has been chosen as Germany is considered one of the world’s leading markets for renewable energies and a transformation of the power sector is currently underway. Therefore, established power utility firms face severe changes, which have the characteristics of a potential disruption to their business model (BM). At the same time, new players are challenging these incumbents with new BMs. The research is underpinned by the extant literature on BMs and BMI. The research approach is based on two case studies; the incumbent power utility and the clean-tech start-up sector. The qualitative study comprises of 24 semi-structured interviews conducted with top tier managers, from 18 firms, responsible for BMI within these firms. Key findings: This study extends our knowledge of BMI in both a start-up and an incumbent environment that is influenced by various contingent events. It portrays barriers to BMI and depicts critical success factors for BMI that point out solutions on how to overcome these barriers. It provides a structured BMI framework for established firms and illustrates future BM archetypes in this sector. It clearly documents the German Energiewende is regarded as a disruptive threat from the perspective of incumbent power utility managers. The theoretical contribution of this thesis is a process framework including all identified drivers and challenges for BMI in both established and start-up firms. Contributions to practice include critical success factors for BMI, recommendations to overcome barriers to BMI and future BM archetypes within the newly evolving Energiewende industry based on sustainable technologies.
85

Economie du développement durable et politiques publiques d’énergies en Europe : de l’étude des paradigmes à une évaluation multicritère appliquée aux scénarios d’avenirs énergétiques en Corse / Economics of sustainable development and energy policy in Europe : the study of a multi-criteria evaluation paradigms applied to the energy futures scenarios in Corsica

Pagni, Olivier 16 May 2014 (has links)
L’étude dévoile un caractère pluridisciplinaire portant dans un premier temps sur l’économie du développement durable, l’économie de l’environnement et l’économie écologique.Dans un second temps, nous décryptons précisément, l’agencement en usage, des politiques publiques d’énergie sur une échelle continentale, nationale et territoriale d’analyse du sujet, en s’appuyant sur les données de politiques économiques de l’énergie pour l’Europe, la France et la région Corse. La Corse et ses dispositions particulières liées à son insularité sont appréhendées.Une simulation d’évaluation multicritère de scénarios d’avenir énergétiques conclue nos travaux. L’objectif ici est de déterminer les trajectoires pertinentes en matière de scénarios d’avenirs énergétiques pour la Corse.Elle comprend la construction des scénarios, une présentation de la typologie de recherche d’une évaluation multicritère, incluant un résumé de la littérature scientifique appliquée aux scénarios énergétiques dans le cadre d’une évaluation multicritère, et une synthèse des problématiques multicritères, ainsi qu’un developement portant sur le choix de la méthode.Les résultats de l’évaluation indiquent une préférence forte pour le scénario du développement durable. Ils déterminent le meilleur compromis possible entre les différentes hypothèses de scénario selon les critères retenus. Le résultat obtenu indique que le développement durable offre des solutions aux problématiques locales. / The study reveals a multidisciplinary character concerning, in the first time, the economy of the sustainable development, economy of the environment and ecological economy.In the second time, we will study precisely, the way public policies on energy are carried out and regarded at, on a continental, national and territorial ladder, by leaning on the political data of the macroeconomics of energy politics for Europe, France and finally the Corsican region. The frame of the analysis was delimited by an applied formal perimeter, and inscribes itself in a continuum of integration of sustainable development as an aim. All the aspects of the particular situation of Corsica due to its insularity will be approached and studiedA multicriteria simulation and evaluation of different energy scenarios which will conclude our work. The objective here is to determine the best possible ways for Corsica to source its energy in the future.This includes the construction of scenarios, a presentation of the research typology of a multicriteria evaluation, including a summary of the scientific literature applied to energy scenarios as part of the multicriteria evaluation, and a synthesis of multicriteria problematic, as well as a development concerning the choice of the applied method.The results of our study point out a strong preference for the scenario of sustainable development. They determine the best possible compromise between the different hypothetical scenarios according to our chosen criteria. Our obtained result points out that sustainable development offers the best solutions to local given problems.
86

Se chauffer à Istanbul : Des pratiques thermiques face aux épreuves de la transition et de l’efficacité énergétiques / Heating practices in Istanbul facing the challenges of energy transition and energy efficiency

Arik, Elvan 07 December 2018 (has links)
Cette recherche s’intéresse aux transformations des pratiques de chauffage à Istanbul impulsées par l’arrivée d’une nouvelle ressource énergétique. À travers l’analyse d’une trajectoire heurtée et contestée de diffusion du gaz naturel en substitut de combustibles traditionnels (charbon/bois/fuel), ma thèse dévoile les spécificités et les contradictions d’un processus « ordinaire » de transition énergétique au regard des dynamiques inégales d’appropriation sociale des innovations technologiques, qui viennent conforter et parfois subvertir la nature même des projet techniques et politiques. Inspiré par des travaux sur la sociologie de l’énergie et d’écologie politique urbaine, je propose de suivre dans le temps et dans l’espace les modalités d’agencement d’un nouveau système sociotechnique (service de distribution en réseaux, équipements de chauffage prétendant à l’efficacité énergétique pour la dernière génération d’entre eux, panneaux solaires, etc.), de comprendre les logiques conflictuelles de territorialisation de ces dispositifs en lien avec d’autres dynamiques de transformations urbaines, et enfin de repérer les conditions matérielles, culturelles et socio-économiques, plus ou moins favorables, pour que ces infrastructures réussissent à s’encastrer dans le quotidien des habitants. Ce faisant, ma thèse répond à un double questionnement : comment expliquer la rapidité et la massivité du déploiement du gaz naturel étant donnée la nature des obstacles à surmonter dans le contexte d’une métropole émergente (étalement urbain, concentration de pauvreté, inadaptation d’un cadre bâti hérité à l’usage du chauffage centralisé) ? Comment interpréter les multiples formes de vulnérabilité produites par un processus de transition énergétique censé, paradoxalement, incarner la modernisation et accompagner l’internationalisation d’Istanbul ? / My research focuses on the transformations of heating practices in Istanbul driven by the arrival of a new energy resource. Through the analysis of a contested and non linear trajectory of natural gas diffusion, my dissertation reveals the specificities and the contradictions of an « ordinary » process of energy transition (natural gas being a substitute for traditional fuels such as coal/wood) in light of the unequal dynamics of social appropriation of technological innovations, which reinforce and sometimes subvert the very nature of technical and political projects. Inspired by works on the sociology of energy and urban political ecology, I propose to analyze the construction of a new socio-technical system (network distribution service, boiler devices which pretend to be efficient for the most recent ones, meters, solar panels, etc.), to understand the conflicting logics of territorialization of these artefacts in relation with other dynamics of urban transformations, and finally to identify the material, cultural and socio-economic conditions, though which these new energy amenities success or failed to connect differents categories of people and neighbourhoods. In doing so, my thesis answers a double questioning : given the nature of various obstacles to overcome in the context of Istanbul (urban sprawl, high rates of poverty, heritage of a built environment which is inapropriate with the installation of central heating system), how can we explain the quickness and the large scale development of natural gas demand in Istanbul ? How can we interpret the multiple forms of vulnerability produced by an energy transition process, which is paradoxically, supposed to embody the modernization of Istanbul and to foster its internationalization ?
87

TRANSIÇÃO ENERGÉTICA E EXPLORAÇÃO DE GÁS NATURAL NO MARANHÃO: possibilidades e limites a partir de 2013. / ENERGY TRANSITION AND NATURAL GAS EXPLOITATION IN THE MARANHÃO: possibilities and limits from 2013.

SILVA, Daniele de Fátima Amorim 10 March 2017 (has links)
Submitted by Maria Aparecida (cidazen@gmail.com) on 2017-11-13T13:26:58Z No. of bitstreams: 1 Daniele de Fátima.pdf: 3283674 bytes, checksum: 56fe8cb03480237e34b489c2b61dbfd6 (MD5) / Made available in DSpace on 2017-11-13T13:26:58Z (GMT). No. of bitstreams: 1 Daniele de Fátima.pdf: 3283674 bytes, checksum: 56fe8cb03480237e34b489c2b61dbfd6 (MD5) Previous issue date: 2017-03-10 / The importance of Natural Gas in world is growing, with highlights to its efficiency and competitiveness, reaching the point of being considered the fuel of energy transition to a less carbonized matrix. When it comes to energy transition, a change in the profile of energy consumption is can be observed throughout the development of capitalism. What was an economy based on firewood and charcoal, facing the shortage of resources becomes supplied by mineral coal, that by technological limitations gives space to oil, perhaps the energy source with greater geopolitical strength witnessed until current days. The transition that shall happen in the next years will not be due to paucity or any other technological limitations of oil, but because since the world has become more rigorous and is uniting efforts so that the pollution level, largely due to the use of fossil energy sources, can reduce in order to maintain the future development of nations. In these terms, the natural gas launches as the most appropriated fuel to energy transition, keeping in sight its property of less polluting, reduced cost and high productivity. In Brazil, the energy matrix diversification model, predicting the growth of natural gas supply happened only at the beginning of XXI century, demanding a specific regulation mark so the private agents could also operate its industry and the costs of investments in specific assets could minimize. In the last four years, Maranhão became an important hub of natural gas production, benefiting from the opening of the industry to private agents. One of main questions of this research refers to the use of this input into the industry, having as reference three scenarios of princes into the internal energy market competition. To identify and forecast demand for natural gas into the selected sub-sectors is used as basis the GEE-matrix introduced by Braga (2015) and to measure the environmental impacts is used as reference the Montes (2000) method. Finally, it is proven that the insertion of natural gas into the state's industrial matrix is capable of generating economic, social and environmental gains for the population of Maranhão. / A importância do gás natural em termos mundiais é crescente, com destaques para sua eficiência e competitividade, a ponto de ser considerado o combustível da transição energética para uma matriz menos carbonizada. Quando se trata de transição energética, observa-se uma mudança no perfil de consumo de energia ao longo do desenvolvimento do capitalismo. O que era uma economia baseada em lenha e carvão vegetal, diante da escassez iminente dos insumos, passa a ser sustentada pelo carvão mineral, que por limitações tecnológicas cede espaço para o petróleo, talvez a fonte energética com maior força geopolítica presenciada até os dias atuais. A transição que deverá ocorrer nos próximos anos não será decorrente de escassez ou quaisquer limitações tecnológicas do petróleo, mas porque o mundo tornou-se mais exigente e está unindo esforços para que o nível de poluição, decorrente em grande parte das fontes energéticas fósseis, seja reduzido a fim de preservar o desenvolvimento futuro das nações. Nesses termos, o gás natural se lança como o combustível mais apropriado para a transição energética, tendo em vista sua característica de menos poluente, custo reduzido e elevado rendimento. No Brasil, o modelo de diversificação da matriz energética, prevendo-se o crescimento da oferta de gás natural ocorre somente no início do século XXI, exigindo um marco regulatório específico para que os agentes privados também passassem a operacionalizar a indústria e os custos decorrentes dos investimentos em ativos específicos fossem minimizados. O Maranhão passou figurar nos últimos quatro anos como polo importante de produção de gás natural, sendo beneficiado pela abertura da indústria aos agentes privados. Um dos principais questionamentos desta pesquisa se refere ao aproveitamento desse insumo no setor industrial, tendo como referência três cenários de preços na competição interenergética. Para identificar e prever a demanda de gás natural dos subsetores selecionados utiliza-se como base a metodologia GEE- Matriz, apresentada por Braga (2015) e para mensuração dos impactos ambientais, tomou-se como referência a metodologia de Montes (2000). Por fim, comprova-se que a inserção do gás natural na matriz industrial do Estado é capaz de gerar ganhos econômicos, sociais e ambientais para a população Maranhense.
88

Análise integrada do sistema energético urbano: estudo de caso da cidade de Porto Alegre / Integrated analysis of the urban energy system: case study of the city of Porto Alegre

Weber, Natália de Assis Brasil 20 March 2017 (has links)
Nos dias atuais as cidades são o epicentro de uma transformação energética, pois, são elas as principais consumidoras de matéria e energia. Energia fornecida, em sua maioria, através de um sistema convencional, centralizado e ineficiente. Dessa forma, são nos centros urbanos que poderão ser melhor implementadas estratégicas de eficiência energética e conservação de energia. Contudo, antes que os municípios se comprometam com novas iniciativas políticas e investimentos, o primeiro passo é melhorar a compreensão do sistema energético local. Por conseguinte, o objetivo central desta pesquisa é compreender de forma mais integrada o sistema energético de uma cidade através da aplicação de uma metodologia de análise. O município escolhido como estudo de caso é Porto Alegre, por ser uma cidade que se comprometeu em estabelecer mudanças para reduzir as emissões dos gases de efeito estufa, contudo, sem ainda possuir um plano de ação definido. A metodologia do trabalho é qualitativa e quantitativa e foi dividida em três etapas principais: a revisão bibliográfica, o desenvolvimento da metodologia de análise do sistema energético urbano e a aplicação da metodologia proposta. A revisão bibliográfica forneceu a base teórica para o desenvolvimento da metodologia de análise do sistema energético urbano. Esta metodologia prevê o levantamento de dados diversos que se complementam e, dessa forma, possibilitam uma análise integrada e mais aprofundada do sistema energético da cidade. Para tanto, a análise do sistema energético foi dividida em três etapas: caracterização municipal, análise da demanda de energia e levantamento da oferta das principais fontes energéticas locais. Para esta última etapa, visando um exercício concreto de avaliação, especificou-se o potencial de produção de eletricidade através do recurso solar. Os principais resultados da análise do sistema energético de Porto Alegre, entre os anos 2005 e 2014, destacam que o consumo de energia cresceu oito vezes mais que o aumento populacional e menos que a metade do PIB da cidade. Igualmente, no mesmo período, a frota de veículos, assim como o consumo de gasolina, aumentou 13 vezes mais que a população. Entre os setores econômicos analisados o setor transporte foi responsável, em 2014, pelo consumo de 60% da demanda final de energia da cidade. Nesse ano, a fonte de energia mais consumida foi a eletricidade, representando 28,1% do consumo final. Ainda analisando os dados de 2014, verificou-se que o consumo de eletricidade per capita de Porto Alegre pode ser considerado alto, 2,58 MWh/per capita, se igualando ao do Brasil e ao de alguns países desenvolvidos. Em relação ao potencial de produção de eletricidade, a partir da fonte solar, estimou-se um potencial de 2.549 GWh/ano, considerando todo o território da cidade, e de 772 GWh, considerando apenas o território que possuem edificações, aproximadamente 30% da cidade. Isto significa que se todos os consumidores residenciais e comerciais produzissem sua própria energia poderiam ser gerados 2.892 GWh por ano em Porto Alegre. Essa energia seria capaz de suprir 75,8% de toda a demanda de eletricidade da cidade em 2014. Ao final, ressaltou-se a importância de articular o planejamento energético ao planejamento urbano e ao plano de mobilidade urbana, uma vez que o sistema energético urbano está relacionado com os demais. / Nowadays cities at are the epicenter of an energetic transformation. Today, they are the main consumers of matter and energy. Most of that energy supplied through a conventional, centralized and inefficient system. Thus, it is in urban centers that strategic energy efficiency and energy conservation can be better implemented. However, before municipalities commit to new policy initiatives and investments, the first step is to improve understanding of the local energy system. Therefore, the central objective of this research is to understand in a more integrated way the energy system of a city through the application of a methodology of analysis of an urban energy system. The municipality chosen as a case study is Porto Alegre. It was chosen because is a city that has committed itself to establishing changes to reduce emissions of greenhouse gases, however, it does not have a defined plan of action. The methodology of the work is qualitative and quantitative and was divided into three main stages, among them: literature review, development of the methodology of urban energy system analysis, and application of the proposed methodology. The literature review provided the theoretical basis for the development of the methodology of analysis of the urban energy system. This methodology determines the collection of diverse data that complement each other and, thus, enable an integrated and more in-depth analysis of the city\'s energy system. In order to do so, the analysis of the energy system was divided into three stages: municipal characterization, analysis of the energy demand and survey of the supply of the main local energy sources. For this last stage, aiming a specific evaluation exercise, was specified the potential of electricity production through the solar resource.The main results of the analysis of the energy system of Porto Alegre, between 2005 and 2014, highlight that energy consumption grew eight times more than the population increase and less than half of the city\'s GDP. Also, in the same period, the car fleet grew 13 times more than the population. Among the economic sectors analyzed, the transportation sector was responsible for the consumption of 60% of the final energy demand of the city, in 2014. In that year, the most consumed energy source was electricity, representing 28.1% of final consumption. The per capita electricity consumption in Porto Alegre was considered high, 2.58 MWh/per capita, which equals that of Brazil and some developed countries. Regarding the potential for electricity production, it was determined a potential of 2,549 GWh/year (considering the entire territory of the city), and 772 GWh (considering only the territory that have buildings, approximately 30% of the city). This means that if all residential and commercial consumers produced their own energy could generate 2,892 GWh per year in Porto Alegre. This energy would be able to supply 75.8% of all city electricity demand. In the end, it was emphasized the importance of unifying the energy planning to the urban planning and to the urban mobility plan, since the urban energy system is related to both.
89

Analyzing flexible demand in smart grids

Kühnlenz, F. (Florian) 25 October 2019 (has links)
Abstract The global energy system is undergoing a slow but massive change, initiated by environmental concerns but it is increasingly driven also by the zero-marginal cost of renewable energy. This change includes an increase in the effort to make the electric power system the main transport path for energy in the future. A massive research and development effort has henceforth been put into modernizing the electricity grid towards a so-called Smart Grid, by combining the power grid with communication networks and automation, as well as modernized market systems and structures. This work contributes to this process by introducing two unique models. The first provides a tool for better understanding the impact of combined infrastructure networks with a simple yet complex model of a combined energy, communication and decision model. The second model provides a detailed agent-based environment of an electricity market, supporting various independent entities inside the market, as well as a high time resolution and the often-neglected aspect of coupled market stages. That is, all mis-predictions of the first market stage (day-ahead) have to be settled at the second (balancing) stage. Both models are then used to assess the problem of demand side management, in which the traditional practice of power production being adjusted to the demand is at least partially dropped and flexibility in the demand is used to match the supply – as such technologies are deemed crucial to integrate the unsteady supply from renewable resources, like wind and solar power. We find that complicated scaling effects can be found even in the simplified model, hinting at insufficient consideration of the complexities involved in the real world. We then go to show such unfavorable scaling effects also exist in the current market environment as modeled in our second model. Finally, we show how to circumvent these problems within the current environment as well as introduce a framework to analyze cyber-physical systems and better handle their complexity. / Tiivistelmä Globaali energiajärjestelmä on hitaan, mutta massiivisen muutoksen edessä. Tämän muutostarpeen on käynnistänyt ympäristöämme koskevat huolet, mutta lisääntyvässä määrin tähän vaikuttaa nykyään uusiutuvan energian marginaalikustannusten nollataso. Tähän muutokseen liittyy selkeä sähköverkkojen roolin korostuminen, ja pyrkimyksenä näyttää olevan muutos, jossa sähköverkot siirtävät suurimman osan käyttämästämme energiasta. Tämän seurauksena on käynnistetty merkittäviä tutkimus-ja tuotekehityspanostuksia, joiden tavoitteena on nykyaikaistaa sähköverkot älysähköverkoiksi. Älysähköverkoissa yhdistyvät sähköverkkoon integroidut tietoliikenneverkot ja automaatio sekä modernit sähkömarkkinajärjestelmät ja -rakenteet. Tämä työ tuottaa lisää ymmärrystä uudistumisprosessiin tuottamalla kaksi uutta malliratkaisua. Ensimmäisessä mallissa kehitetään työkalu, jonka avulla pystytään paremmin ymmärtämään toisiinsa yhdistettyjen infrastruktuuriverkkojen toimintaa yksinkertaisella, mutta kompleksisella mallilla, jossa energia- ja tietoliikenneverkot sekä tarvittava päätöksenteko yhdistetään. Toinen malli tuottaa yksityiskohtaisen agenttipohjaisen ympäristön sähkömarkkinasta. Malli tukee erilaisten itsenäisten sähkömarkkinaosapuolten mallintamista korkealla aikaresoluutiolla ja erityisesti usein huomiotta jätettyjen toisiinsa kytkeytyvien eri markkinavaiheiden mallintamista. Malli antaa eväitä vastata kysymykseen, miten ensimmäisessä markkinavaiheessa (vuorokausimarkkina) syntyvä ero tuotannon ja kulutuksen välillä tasapainotetaan toisessa markkinavaiheessa (tasapainotusmarkkina). Kumpaakin luotua mallia hyödynnetään arvioitaessa kulutushallintaa, jossa sähköverkkojen perinteisestä tuotannon ja kulutuksen tasapainosta ainakin osittain luovutaan ja kysyntä- eli kulutusjoustoa käytetään tasaamaan kulutus tuotannon suuruiseksi. Tämänkaltaiset mekanismit ovat oleellisia ja kriittisiä, kun sähköverkkoon liitetään suuria määriä vaihtelevatuottoista uusiutuvaa energiaa, kuten aurinko- ja tuulienergiaa. Tutkimuksessa huomasimme merkittäviä ja monimutkaisia skaalautuvuusilmiöitä, jotka kertovat, että sähköverkkojen tutkimuksessa reaalimaailman kompleksisuuden huomioiminen on ollut riittämätöntä. Sähkömarkkinamallia hyödyntämällä huomasimme vastaavia epätoivottuja skaalausilmiöitä esiintyvän myös nykyisessä sähkömarkkinassa. Erityisesti loimme keinoja, joilla skaalausilmiöistä on mahdollista päästä eroon nykyistä sähkömarkkinarakennetta käytettäessä. Tässä työssä luotuja malleja ja niiden viitekehystä hyödyntämällä pystymme paremmin analysoimaan kyberfysikaalisia järjestelmiä ja hallitsemaan niiden kompleksisuutta.
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Understanding and analysing business models in the context of energy transition. Proposition of the DRBMC (Demand Response Business Model Canvas) to design new entrepreneur's business model in “Demand Response” markets / Comprendre et analyser les modèles d’affaires dans le contexte de la transition énergétique.Proposition du modèle DRBMC (Demand Response Business Model Canvas) pour concevoir de nouveaux modèles d’affaires pour les entrepreneurs du secteur de « Réponse à la Demande » énergétique

Hamwi, Michael 02 July 2019 (has links)
L'accumulation de gaz à effet de serre dans l'atmosphère, produite par des activités anthropiques notamment dans le secteur de l’énergie est une des causes principales du changement climatique. Par conséquent, réaliser une véritable transition énergétique par une décarbonisation des réseaux électriques est devenue un besoin urgent pour atténuer les effets du réchauffement climatique. Dans cette transition, l’introduction des énergies renouvelables a été initiée depuis plusieurs années, principalement en raison de la participation de nouveaux acteurs à ce marché. Aujourd’hui, l’un des grands défis est de maintenir l’équilibre et la sécurité du réseau électrique en tenant compte de la diversité et de la variabilité des ressources énergétiques renouvelables connectées au réseau. L’une des approches permettant de régler ce problème et d’accroître la flexibilité du réseau électrique par ce que l’on désigne comme la Réponse à la Demande (RD). Cette thèse examine précisément ces nouvelles approches et montre l’intérêt de repenser les relations entre les différentes partie-prenantes pour faire émerger des nouveaux modèles d’affaires afin de déployer de nouvelles innovations au service de la transition énergétique. La méthodologie de recherche mise en œuvre de cette thèse consiste en une revue systématique de la littérature et une étude des données empiriques de 15 jeunes entreprises européennes du secteur de l’énergie. En conséquence, la thèse fournit à la communauté de la recherche (1) une méthode de classification pour catégoriser les différents modèles d’affaires de l’énergie (MAEs) et présente une première synthèse des MAE identifiés dans la littérature; (2) un cadre d’analyse des start-ups dans le secteur de l’énergie, complété par l’analyse de 15 start-ups de ce domaine; (3) un outil conceptuel pour l'innovation en matière de RD, appelé Canevas de Modèle d'Affaires de Réponse de Demande (CMARD), qui comprend 12 éléments interreliés. Ce canevas vise à évaluer les activités des offres de RD et à soutenir l'émergence de nouveau modèles d'affaires de RD. Ces résultats permettent de proposer un cadre analytique simplifié des pratiques existantes et peuvent également aider des entrepreneurs ou décideurs à explorer et concevoir de nouvelles offres sur le marché de la réponse à la demande. / The accumulation of greenhouse gases in the atmosphere, produced by human activities in the energy sector is one of the main causes of climate change. Therefore, the decarbonization of power systems has become an urgent need the mitigate to the effects of climate change and achieve the energy transition. The share of renewable energy technologies has been increasing mainly due to the participation of new market players. Today, however, one of the great challenges is to maintain the electricity system’s balance and security despite the large amount of renewable energy resources connected to the grid. One of the approaches to deal with this issue and to increase power system flexibility is the Demand Response (DR). Moreover, scholars argue that business model innovation can act as an energy transition driver. This thesis examines business model innovations in the context of the energy transition by investigating emerging start-up business models. The implemented research methodology in this thesis consists of a systematic literature review and an investigation of empirical data of 15 European energy start-ups. As a result, the thesis provides the research community with (1) a grouping method to classify different Energy Business Models (EBMs) and an initial synthesis of the EBMs identified in the literature; (2) a framework to analyse start-ups in the energy sector, completed with the analysis of 15 energy start-ups; (3) and a conceptual tool for DR innovation, named as the Demand Response Business Model Canvas (DRBMC), which includes 12 interrelated elements. This canvas aims at evaluating DR activities and supporting the emergence of new DR business models. These results can also help entrepreneurs explore new demand response market opportunities, enabling a better understanding and providing a simplified analytic framework of existing business practices.

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