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description Publicationkeyboard_double_arrow_right Research 2016Publisher:Brasília: Instituto de Pesquisa Econômica Aplicada (IPEA) Authors: Sambuichi, Regina Helena Rosa; Galindo, Ernesto Pereira; Pereira, Rodrigo Mendes; Constantino, Michel; +1 AuthorsSambuichi, Regina Helena Rosa; Galindo, Ernesto Pereira; Pereira, Rodrigo Mendes; Constantino, Michel; dos Santos Rabetti, Matheus;This paper analyzes the production diversity among Brazilian agricultural family farms, using the DAP (declaration of Pronaf entitlement). The diversity is measured with a Simpson index, that goes from zero, for monocultures, to one. Production is considerably diversified in these types of farms. 57% of them have a diversification index above 0,35, although it has been noticed an increase in specialization in recent years. The share of monoculture farms rose from 25% in 2012 to 33% in 2014. The diversification index is set as the dependent variable on a Tobit regression with variables that are commonly used to explain the decision to diversify, such as regional dummies, farm size, number of farms, farmer's age, income from social benefits, education, gross production, or a dummy for access to technical assistance. All of these variables have significant effects on production diversity. The results suggest a strong regional bias in terms of diversification, as well as the importance of technical assistance and the availability of technologies in order to spur diversification among family farmers.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis 2023 PortugalAuthors: Flambó, Tiago Miguel Albano;O desenvolvimento sustentável, como conceito fulcral para a sobrevivência do nosso planeta, engloba um conjunto de fatores dos quais a energia constitui uma parte vital. Esta ideia aparece inclusivamente vertida em diversos Objetivos do Desenvolvimentos Sustentável (ODS), tais como os Objetivos N.º 9, 11, 12 e 13. Os edifícios representam cerca de 50% do fenómeno de poluição ambiental, fruto do consumo energético inerente à sua utilização, que ascende a 41% de toda a energia primária produzida. Estes dados podem ser explicados pelo aumento da população mundial, a pouca reabilitação de edifícios a nível global e o exponencial aumento do consumo energético para suprir necessidades de aquecimento e arrefecimento de edifícios. Neste âmbito, considerou-se importante verificar a viabilidade de novas soluções que permitam criar estabilidade térmica dentro dos edifícios, como é o caso da aplicação de Materiais de Mudança de Fase (Phase Change Materials – PCM) em soluções construtivas. Os PCM apresentam uma comprovada capacidade de armazenamento térmico em comparação com as soluções tradicionais. Contudo, uma das grandes vantagens destes materiais reside na não necessidade de armazenamento de energia elétrica, mas sim o armazenamento da energia térmica do ambiente envolvente. A modelação da aplicação dos materiais num edifício-tipo e num edifício real, permitiu obter diferenças nas temperaturas de pico interiores de até 1 °C, bem como uma redução global de consumos energéticos entre 12% e 23%, para a espessura mínima dos PCM comerciais analisados. A introdução dos PCM permitiu, de igual forma, a redução da amplitude térmica interior, observando-se reduções até 83%. A adoção deste tipo de soluções leva a que seja possível obter reduções de emissões entre os 3,3% e os 33%, no edifício de mais baixa eficiência energética e entre os 2% e os 8%, para o caso de um edifício de maior eficiência energética. O período de retorno do investimento nestes materiais mostrou-se elevando, sendo um desafio ao vetor social da sustentabilidade. Sustainable development, as a key concept for the survival of our planet, includes a set of factors of which energy is a vital part. This idea also appears in several Sustainable Development Objectives (SDO), such as Objectives Nos. 9, 11, 12 and 13. Buildings represent about 50% of the environmental pollution phenomenon, resulting from the energy consumption inherent to its use, which amounts to 41% of all primary energy produced. This can be explained by the increase of the world population, the limited rehabilitation of buildings worldwide and the exponential increase in energy consumption, to meet heating and cooling needs of buildings. In this context it will be important to verify the viability of new solutions that allow thermal stability in buildings, such as the application of Phase Change Materials (PCM) in constructive solutions. PCM have proven thermal storage capacity compared to traditional coating solutions. However, one of the great advantages of these materials lies in the fact that they do not need to store electrical energy, but the storage of thermal energy from the surrounding environment. The application of the materials, in a simulated context, in a model building and in a real building, allowed to obtain differences in interior peak temperatures of up to 1 °C, as well as an overall reduction in energy consumption between 12% and 23%, for the minimum commercial thickness of the PCM used. The introduction of PCM also made it possible to reduce the interior temperature range, with reductions of up to 83% observed. About the environmental sustainability themes, the adoption of this type of solution led to emission reductions between 3.3% and 33%, in the low-efficiency building, and between 2% and 8%, for the most efficient building. The payback period for the investment in these materials need to be increased, representing a challenge to the social vector of sustainability.
Repositório Aberto d... arrow_drop_down Repositório Aberto da Universidade AbertaDoctoral thesis . 2023Data sources: Repositório Aberto da Universidade Abertaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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visibility 35visibility views 35 download downloads 18 Powered bymore_vert Repositório Aberto d... arrow_drop_down Repositório Aberto da Universidade AbertaDoctoral thesis . 2023Data sources: Repositório Aberto da Universidade Abertaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2012 PortugalAuthors: Ermida, Graça Patrícia de Azevedo;Este trabalho tem como principal objectivo analisar a política externa da Turquia e o relacionamento deste país com a União Europeia, o qual tem uma longa tradição histórica. Pela sua relevância para este relacionamento, é dada uma especial ênfase aos aspectos de política externa ligados com a segurança energética europeia. Desta forma, os particularismos da posição geoestratégica da Turquia e as suas relações com as regiões do Médio Oriente, Cáucaso e Ásia Central ocupam um lugar significativo na análise. Por último, procura-se ainda avaliar os eventuais benefícios que poderão resultar de uma adesão da Turquia à União Europeia, em especial no caso da segurança energética. Our main objective is to study Turkey´s foreign policy and its historical relationship with the European Union. Throughout this work, we emphasize aspects of foreign policy related to energy security. Thus, the special nature of Turkey's geostrategic position and its relations with the regions of the Middle East, Caucasus and Central Asia occupies a central place in this analysis. Finally, we seek to evaluate possible benefits that may result from Turkey´s accession to the European Union, especially regarding energy security.
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visibility 125visibility views 125 download downloads 212 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2022 PortugalAuthors: Cardoso, André Filipe Silva;No município do Seixal, pretende-se estudar a implementação de um projeto para a produção de hidrogénio verde. Este projeto nasceu pela necessidade de responder às metas da descarbonização em Portugal, como sendo uma forte ferramenta para alcançarmos a desejada neutralidade carbónica. O projeto piloto tem como base a obtenção de hidrogénio verde para descarbonizar setores e eletrificar os mesmos de uma maneira “verde”. Neste âmbito, o município do Seixal está empenhado na criação de uma comunidade de energias renováveis para fornecimento de energia ao parque industrial do Seixal e dessa mesma energia verde, fazer uso por meio de um sistema eletrolisador para a obtenção de hidrogénio verde para várias finalidades. Desta forma, no presente projeto, após uma parte teórica acerca dos métodos de obtenção de hidrogénio, modos de utilização do mesmo, e contextualização do hidrogénio em Portugal, é proposto um estudo para aferir a forma mais rentável de utilização do hidrogénio resultante desse projeto piloto do município. Serão apresentados diferentes cenários, tais como a utilização do hidrogénio em três cadeias de valor, sendo estas power-to-mobility, power-to-gas e power-to-power e ainda dois contextos onde a energia utilizada na produção de hidrogénio tem proveniências distintas, um sistema fotovoltaico privado e outro comunitário. Todos os cenários apresentados por meio de uma análise financeira, resultam em valores que na atualidade permitem ser minimamente aceitáveis sem recurso a quaisquer incentivos monetários. No futuro, com o amadurecimento das tecnologias poderá ser possível obter resultados mais favoráveis, na medida em que os períodos de retorno do investimento nos vários cenários será inferior, conseguindo-se assim uma introdução do hidrogénio mais acessível nos vários setores económicos e uma economia cada vez mais neutra em carbono, indo de encontro às perspetivas europeias. This project was born from the necessity of achieving the decarbonization targets set in Portugal in order to reach the so desired carbon neutrality and as so, it is going to be investigated the implementation of a green hydrogen production project under Seixal’s municipality. The pilot project basis is established in the obtention of green hydrogen in order to decarbonize sectors and start the process of electrification in a green way. Additionally Seixal’s municipality is invested in the creation of a renewable energies community mainly focused to supply its own industrial complex, and use that same green energy through an electrolyser system in order to obtain green hydrogen for multiple purposes. Firstly, this project will introduce the process of hydrogen obtention, utilization and contextualization in Portugal, followed by a study to assess the best way, rate of return wise, to use the hydrogen sourced from the municipality’s pilot project. Several scenarios will be presented, such as the use of hydrogen in three chain values: power-to-mobility, power-to-gas and power-to-power. There are also two additional contexts where the energy used in the hydrogen production came from two distinct sources: a private photovoltaic system and a communitary one. All of the scenarios are presented through a financial analysis that result in actual minimal acceptable values with no financial incentives needed. However, futuristically, and technologically speaking, given the technological improvement on the equipment used, it is possible to obtain favourable results in such a way that the payback period on every scenario will be lower, hence making it an accessible insertion of hydrogen energy for all the economic sectors involved, contributing overall towards a more carbon neutral economy and therefore meeting the European set targets.
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visibility 1Kvisibility views 1,084 download downloads 1,833 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2014Publisher:Unknown Authors: Daubermann, Elaine Correa; Chagas, Lucas Squarize; Gurgel, Angelo Costa; Sakurai, Sérgio Naruhiko; +4 AuthorsDaubermann, Elaine Correa; Chagas, Lucas Squarize; Gurgel, Angelo Costa; Sakurai, Sérgio Naruhiko; Daubermann, Elaine Correa; Chagas, Lucas Squarize; Gurgel, Angelo Costa; Sakurai, Sérgio Naruhiko;We investigate the hypothesis that the conversion of forest and pasture land to cropland in Brazil decreases yields by 50%. Such hypothesis is being used by the California Air Resource Board to estimate the greenhouse gas emissions from indirect land use changes due to the expansion of biofuels production. We formulate several econometric models to test such hypothesis. The results from the majority of the models indicate that yields do not decrease under the expansion of cropland area in the country, or the decrease in yields is very small. Therefore, our results indicate the need for revising and correcting the parameters in the Californian low carbon emissions policy.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2022 PortugalAuthors: Serra, Ricardo João Matos;Dissertação de Mestrado em Engenharia Eletrotécnica e de Computadores apresentada à Faculdade de Ciências e Tecnologia The evolution of society, its demographic growth, and its technological and economic development made electricity an essential good, causing the consumption of electricity to increase over the years, to guarantee these supply fossil fuels were used in its production an unsustainable option that has generated high levels of pollution and a climate crisis. To address these problems, the European Union established the European Directive 2018/2001. This directive allows renewable energy self-consumers to produce, consume, share, store and sell electricity, promoting various sustainable behaviors such as reducing energy bills, reducing CO2 emissions, combating energy poverty, and reducing the cost of energy—initial investment. This dissertation aims to develop different methodologies for defining the sharing coefficients of energy produced in a CER and to establish comparisons of their performance in the CER. The CER used as a case study in this dissertation is composed of two schools in Coimbra and the DEEC building. In a preliminary analysis of the consumption of each building, several simulations were carried out to find out which would be the best location of production in the CER, having that choice fell on school 1. Five methods were developed to define the coefficients of sharing the surplus energy produced by the CER by its members. In key 1, fixed coefficient, a fixed percentage of energy sharing is assigned, in key 2 the sharing coefficients are proportional to the consumption of each user, that is, members who have higher consumption receive a greater percentage of energy. Keys 3, 4, and 5 all have the same energy sharing philosophy, they follow a list of priorities, with energy sharing being done by serving the highest priorities until they run out of energy or all members of the list see their consumption needs. satisfied. According to the results obtained, it was possible to conclude that the best key or the most beneficial key for this particular CER would be key 3, as it generates less unused surplus energy and still has good equity, that is, it is energy effectively used annually by CER members, one member, in this case, uses 58% and another 42%.In short, to choose the distribution key that optimizes the sharing of surplus energy in a community, we must consider the community, since each key has its advantages and disadvantages, and its use varies according to the CER. A evolução da sociedade, o seu crescimento demográfico e o seu desenvolvimento tecnológico e económico, tornou a eletricidade um bem essencial, fazendo com que o consumo de energia elétrica aumentasse ao longo dos anos, para garantir esta oferta foram utilizados combustíveis fósseis na sua produção, uma opção não sustentável que gerou elevados níveis de poluição e uma crise climática. Para colmatar esses problemas a União Europeia estabeleceu a Diretiva Europeia 2018/2001. Essa diretiva permite aos autoconsumidores de energia renovável produzir, consumir, partilhar, armazenar e vender eletricidade, promovendo diversos comportamentos sustentáveis como redução na fatura energética, a redução das emissões de CO2, combate à pobreza energética e consequentemente a redução no custo do investimento inicial. A presente dissertação tem como objetivo desenvolver diversas metodologias de definição dos coeficientes de partilha de energia produzida numa CER e estabelecer comparações do seu desempenho na CER. A CER usada como estudo de caso nesta dissertação é composta por dois estabelecimentos escolares de Coimbra e pelo edifício do DEEC. Numa análise preliminar dos consumos de cada edifício, realizou-se várias simulações para descobrir qual seria a melhor localização da produção na CER, tendo essa escolha recaído na escola 1. Foram desenvolvidos cinco métodos para definição dos coeficientes de partilha da energia excedentária produzida pela CER pelos membros da mesma. Na chave 1, coeficiente fixo, é atribuída uma percentagem fixa de partilha de energia, na chave 2 os coeficientes de partilha são proporcionais ao consumo de cada utilizador, ou seja, membros que tenham maior consumo recebem uma maior percentagem de energia. Já as chaves 3, 4, 5 têm todas a mesma filosofia de partilha de energia, seguem uma lista de prioridades, sendo a partilha de energia feita servindo os mais prioritários até esgotar a energia ou todos os membros da lista vejam as suas necessidades de consumo satisfeitas. De acordo com os resultados obtidos foi possível concluir que a melhor chave ou a chave mais benéfica para esta a CER em particular seria a chave 3, por gerar menos energia excedentária não utilizada e mesmo assim ter uma boa equidade, ou seja, é a energia efetivamente utilizada anualmente pelos membros da CER, um membro, neste caso, utiliza 58% e outro 42%. Em suma, para se escolher a chave de repartição que otimiza a partilha da energia excedentária duma comunidade, devemos ter em consideração a comunidade, visto que, cada chave tem as suas vantagens e desvantagens e a sua utilização varia de acordo com a CER.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023Publisher:Zenodo Authors: SOUZA, José Arilson de; RODRIGUES, Raimundo Nonato;The Constitutional Financing Fund of the North (FNO), created through the Constitutional Funds, has the objective of promoting the development of the North Region, constituting the main financial instrument of the National Policy for Regional Development (PNDR) for the reduction of regional disparities. With the growth and development of the region, new questions and concerns regarding sustainability in the business environment were generated. In this sense, the Sustainability Tripod and its extension, the Multiple Bottom Line, were proposed in order to analyze the economic, social, environmental, ethical and governance dimensions. In this sense, the present work sought to identify the reality of the dimensions of sustainability in the environment of micro and small companies of the Portal da Amazônia that used the resource of the Constitutional Fund for Financing of the North (FNO) for business development. To capture the data, a field survey was carried out with 111 companies that used FNO resources in the period from 2018 to 2022. After the survey, Excel was used for data processing and subsequent analysis. As a result, in the economic dimension, the ability of micro and small companies to expand their revenues was identified, with the responsibility of expanding the use of facilities and an integrated corporate composition to guarantee the economic life of the entity. In the environmental dimension, business actions involving the issuance of environmental licenses and their practices in the operation of the business were observed, while in the social dimension, the expansion of the supply of job openings and an organization dedicated to serving people could be seen. In the Governance dimension, actions of administrative responsibility, control and good practices by the companies interviewed were observed. Closing the context of the dimensions, ethics guides the business of micro and small companies surveyed. Responsibility with the business, both internally and externally, signals an important emphasis on this dimension. The outputs obtained provided the opportunity for theoretical generalizations regarding the confrontation of the reality described in the dimensions of sustainability in the business environment of micro and small companies of the Amazon portal and the theoretical framework that involves the theme.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type 2014 PortugalPublisher:Associação de Pesquisadores e Estudantes Brasileiros na Catalunha (APEC) Authors: Araújo, Mariana Bezerra Moraes de; Broega, A. C.; Ribeiro, Silvana Mota;handle: 1822/34492
O presente artigo tem como objetivo fazer uma reflexão sobre a importância da sustentabilidade no âmbito da moda e o aparecimento de um novo consumidor, mais consciente e preocupado com os problemas da humanidade. Neste trabalho, será discutida a dicotomia existente entre a sustentabilidade e a moda, marcada pela efemeridade e por produtos com um ciclo de vida limitado, onde prevalece a indústria Fast Fashion. Paralelamente, observa-se o surgimento de uma nova vertente o chamado Slow Fashion. O artigo irá abordar o tema do sistema de moda e a sustentabilidade, nomeadamente, a questão dos novos consumidores e do consumo consciente. This article aims to reflect on the importance of sustainability in the context of fashion and the emergence of a new costumer more conscious and concerned about the humanity problems. In this work, we will discuss the dichotomy between sustainability and fashion, marked by ephemerality and products with a limited life cycle where the fast fashion industry prevails. In parallel, we observe the emergence of a new effect called slow fashion. The article will address the theme of fashion system and sustainability, also the issue of new consumers and conscious consumption will be discussed. ISBN 978-84-697-0700-5
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMConference object . 2014Data sources: Universidade do Minho: RepositoriUMUniversidade do Minho: RepositoriUMOther literature type . 2014Data sources: Universidade do Minho: RepositoriUMadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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visibility 4Kvisibility views 3,966 download downloads 2,027 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMConference object . 2014Data sources: Universidade do Minho: RepositoriUMUniversidade do Minho: RepositoriUMOther literature type . 2014Data sources: Universidade do Minho: RepositoriUMadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2016 PortugalAuthors: Silva, Paulo Rôlo da;Nos nossos dias, a segurança energética europeia depende muito das dinâmicas regionais das suas fronteiras a norte e a sul, bem como das dimensões de segurança compreendidas pelos seus vizinhos e parceiros. Nesta dissertação é analisada a hipótese de que a segurança energética europeia não é possível de ser alcançada unicamente através da diversificação de fornecedores e rotas de abastecimento, mas que também é necessário atribuir-lhe uma dimensão de segurança regional. Neste contexto, é apresentada a região do mar Mediterrâneo como sendo detentora dos recursos necessários para complementar as linhas de abastecimento energético europeu, analisando a capacidade de desenvolvimento das energias alternativas nesta região capazes de responderem aos elevados consumos energéticos da União Europeia. Nowadays, European energy security largely depends on the regional dynamics of its borders to the North and South, as well as the dimensions of security understood by its neighbours and partners. In this dissertation it’s examined the hypothesis that European energy security cannot be achieved solely through the diversification of suppliers and supply routes, but that it is also necessary to attribute it with a dimension of regional security. In this context, the Mediterranean Sea region is presented as being the holder of the resources needed to complement the European energy supply lines, analyzing the ability of the development of alternative energies in the region able to respond to the high energy consumption of the European Union.
Repositório da Unive... arrow_drop_down Repositório da Universidade Nova de LisboaMaster thesis . 2016Data sources: Repositório da Universidade Nova de Lisboaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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visibility 99visibility views 99 download downloads 218 Powered bymore_vert Repositório da Unive... arrow_drop_down Repositório da Universidade Nova de LisboaMaster thesis . 2016Data sources: Repositório da Universidade Nova de Lisboaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object 2018 PortugalPublisher:Universidad Santiago de Cali Publicaciones Authors: Silva, Marcus; Leite, Vicente; Araújo, Paulo Henrique Alves de; Simões, Ananda Thomaz; +3 AuthorsSilva, Marcus; Leite, Vicente; Araújo, Paulo Henrique Alves de; Simões, Ananda Thomaz; Dalmarco, Iago de Camargo; Ferreira, Ângela P.; Queijo, Luís;This paper presents the complete design of a self-sustainable microgrid based on renewable energy sources - pico-hydro and photovoltaic - for the House of Silk museum. This on grid solution is based on the SMA Flexible Storage System using innovative technologies for energy production, storage and. The microgrid is based on a cluster of three battery inverters which establish a three-phase supplying system. The hydro energy is generated using a low head, pico-hydro propeller turbine, and a horizontal wheel of a mill. Both are tied to the microgrid through an innovative solution, connecting generators to photovoltaic inverters. The photovoltaic energy is produced by means of highperformance photovoltaic conventional modules that will be mounted on the roof of the House of Silk and the components of hydropower generation will be installed inside the gallery of a former mill. info:eu-repo/semantics/publishedVersion
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visibility 88visibility views 88 download downloads 88 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Research 2016Publisher:Brasília: Instituto de Pesquisa Econômica Aplicada (IPEA) Authors: Sambuichi, Regina Helena Rosa; Galindo, Ernesto Pereira; Pereira, Rodrigo Mendes; Constantino, Michel; +1 AuthorsSambuichi, Regina Helena Rosa; Galindo, Ernesto Pereira; Pereira, Rodrigo Mendes; Constantino, Michel; dos Santos Rabetti, Matheus;This paper analyzes the production diversity among Brazilian agricultural family farms, using the DAP (declaration of Pronaf entitlement). The diversity is measured with a Simpson index, that goes from zero, for monocultures, to one. Production is considerably diversified in these types of farms. 57% of them have a diversification index above 0,35, although it has been noticed an increase in specialization in recent years. The share of monoculture farms rose from 25% in 2012 to 33% in 2014. The diversification index is set as the dependent variable on a Tobit regression with variables that are commonly used to explain the decision to diversify, such as regional dummies, farm size, number of farms, farmer's age, income from social benefits, education, gross production, or a dummy for access to technical assistance. All of these variables have significant effects on production diversity. The results suggest a strong regional bias in terms of diversification, as well as the importance of technical assistance and the availability of technologies in order to spur diversification among family farmers.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis 2023 PortugalAuthors: Flambó, Tiago Miguel Albano;O desenvolvimento sustentável, como conceito fulcral para a sobrevivência do nosso planeta, engloba um conjunto de fatores dos quais a energia constitui uma parte vital. Esta ideia aparece inclusivamente vertida em diversos Objetivos do Desenvolvimentos Sustentável (ODS), tais como os Objetivos N.º 9, 11, 12 e 13. Os edifícios representam cerca de 50% do fenómeno de poluição ambiental, fruto do consumo energético inerente à sua utilização, que ascende a 41% de toda a energia primária produzida. Estes dados podem ser explicados pelo aumento da população mundial, a pouca reabilitação de edifícios a nível global e o exponencial aumento do consumo energético para suprir necessidades de aquecimento e arrefecimento de edifícios. Neste âmbito, considerou-se importante verificar a viabilidade de novas soluções que permitam criar estabilidade térmica dentro dos edifícios, como é o caso da aplicação de Materiais de Mudança de Fase (Phase Change Materials – PCM) em soluções construtivas. Os PCM apresentam uma comprovada capacidade de armazenamento térmico em comparação com as soluções tradicionais. Contudo, uma das grandes vantagens destes materiais reside na não necessidade de armazenamento de energia elétrica, mas sim o armazenamento da energia térmica do ambiente envolvente. A modelação da aplicação dos materiais num edifício-tipo e num edifício real, permitiu obter diferenças nas temperaturas de pico interiores de até 1 °C, bem como uma redução global de consumos energéticos entre 12% e 23%, para a espessura mínima dos PCM comerciais analisados. A introdução dos PCM permitiu, de igual forma, a redução da amplitude térmica interior, observando-se reduções até 83%. A adoção deste tipo de soluções leva a que seja possível obter reduções de emissões entre os 3,3% e os 33%, no edifício de mais baixa eficiência energética e entre os 2% e os 8%, para o caso de um edifício de maior eficiência energética. O período de retorno do investimento nestes materiais mostrou-se elevando, sendo um desafio ao vetor social da sustentabilidade. Sustainable development, as a key concept for the survival of our planet, includes a set of factors of which energy is a vital part. This idea also appears in several Sustainable Development Objectives (SDO), such as Objectives Nos. 9, 11, 12 and 13. Buildings represent about 50% of the environmental pollution phenomenon, resulting from the energy consumption inherent to its use, which amounts to 41% of all primary energy produced. This can be explained by the increase of the world population, the limited rehabilitation of buildings worldwide and the exponential increase in energy consumption, to meet heating and cooling needs of buildings. In this context it will be important to verify the viability of new solutions that allow thermal stability in buildings, such as the application of Phase Change Materials (PCM) in constructive solutions. PCM have proven thermal storage capacity compared to traditional coating solutions. However, one of the great advantages of these materials lies in the fact that they do not need to store electrical energy, but the storage of thermal energy from the surrounding environment. The application of the materials, in a simulated context, in a model building and in a real building, allowed to obtain differences in interior peak temperatures of up to 1 °C, as well as an overall reduction in energy consumption between 12% and 23%, for the minimum commercial thickness of the PCM used. The introduction of PCM also made it possible to reduce the interior temperature range, with reductions of up to 83% observed. About the environmental sustainability themes, the adoption of this type of solution led to emission reductions between 3.3% and 33%, in the low-efficiency building, and between 2% and 8%, for the most efficient building. The payback period for the investment in these materials need to be increased, representing a challenge to the social vector of sustainability.
Repositório Aberto d... arrow_drop_down Repositório Aberto da Universidade AbertaDoctoral thesis . 2023Data sources: Repositório Aberto da Universidade Abertaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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visibility 35visibility views 35 download downloads 18 Powered bymore_vert Repositório Aberto d... arrow_drop_down Repositório Aberto da Universidade AbertaDoctoral thesis . 2023Data sources: Repositório Aberto da Universidade Abertaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2012 PortugalAuthors: Ermida, Graça Patrícia de Azevedo;Este trabalho tem como principal objectivo analisar a política externa da Turquia e o relacionamento deste país com a União Europeia, o qual tem uma longa tradição histórica. Pela sua relevância para este relacionamento, é dada uma especial ênfase aos aspectos de política externa ligados com a segurança energética europeia. Desta forma, os particularismos da posição geoestratégica da Turquia e as suas relações com as regiões do Médio Oriente, Cáucaso e Ásia Central ocupam um lugar significativo na análise. Por último, procura-se ainda avaliar os eventuais benefícios que poderão resultar de uma adesão da Turquia à União Europeia, em especial no caso da segurança energética. Our main objective is to study Turkey´s foreign policy and its historical relationship with the European Union. Throughout this work, we emphasize aspects of foreign policy related to energy security. Thus, the special nature of Turkey's geostrategic position and its relations with the regions of the Middle East, Caucasus and Central Asia occupies a central place in this analysis. Finally, we seek to evaluate possible benefits that may result from Turkey´s accession to the European Union, especially regarding energy security.
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visibility 125visibility views 125 download downloads 212 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2022 PortugalAuthors: Cardoso, André Filipe Silva;No município do Seixal, pretende-se estudar a implementação de um projeto para a produção de hidrogénio verde. Este projeto nasceu pela necessidade de responder às metas da descarbonização em Portugal, como sendo uma forte ferramenta para alcançarmos a desejada neutralidade carbónica. O projeto piloto tem como base a obtenção de hidrogénio verde para descarbonizar setores e eletrificar os mesmos de uma maneira “verde”. Neste âmbito, o município do Seixal está empenhado na criação de uma comunidade de energias renováveis para fornecimento de energia ao parque industrial do Seixal e dessa mesma energia verde, fazer uso por meio de um sistema eletrolisador para a obtenção de hidrogénio verde para várias finalidades. Desta forma, no presente projeto, após uma parte teórica acerca dos métodos de obtenção de hidrogénio, modos de utilização do mesmo, e contextualização do hidrogénio em Portugal, é proposto um estudo para aferir a forma mais rentável de utilização do hidrogénio resultante desse projeto piloto do município. Serão apresentados diferentes cenários, tais como a utilização do hidrogénio em três cadeias de valor, sendo estas power-to-mobility, power-to-gas e power-to-power e ainda dois contextos onde a energia utilizada na produção de hidrogénio tem proveniências distintas, um sistema fotovoltaico privado e outro comunitário. Todos os cenários apresentados por meio de uma análise financeira, resultam em valores que na atualidade permitem ser minimamente aceitáveis sem recurso a quaisquer incentivos monetários. No futuro, com o amadurecimento das tecnologias poderá ser possível obter resultados mais favoráveis, na medida em que os períodos de retorno do investimento nos vários cenários será inferior, conseguindo-se assim uma introdução do hidrogénio mais acessível nos vários setores económicos e uma economia cada vez mais neutra em carbono, indo de encontro às perspetivas europeias. This project was born from the necessity of achieving the decarbonization targets set in Portugal in order to reach the so desired carbon neutrality and as so, it is going to be investigated the implementation of a green hydrogen production project under Seixal’s municipality. The pilot project basis is established in the obtention of green hydrogen in order to decarbonize sectors and start the process of electrification in a green way. Additionally Seixal’s municipality is invested in the creation of a renewable energies community mainly focused to supply its own industrial complex, and use that same green energy through an electrolyser system in order to obtain green hydrogen for multiple purposes. Firstly, this project will introduce the process of hydrogen obtention, utilization and contextualization in Portugal, followed by a study to assess the best way, rate of return wise, to use the hydrogen sourced from the municipality’s pilot project. Several scenarios will be presented, such as the use of hydrogen in three chain values: power-to-mobility, power-to-gas and power-to-power. There are also two additional contexts where the energy used in the hydrogen production came from two distinct sources: a private photovoltaic system and a communitary one. All of the scenarios are presented through a financial analysis that result in actual minimal acceptable values with no financial incentives needed. However, futuristically, and technologically speaking, given the technological improvement on the equipment used, it is possible to obtain favourable results in such a way that the payback period on every scenario will be lower, hence making it an accessible insertion of hydrogen energy for all the economic sectors involved, contributing overall towards a more carbon neutral economy and therefore meeting the European set targets.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2014Publisher:Unknown Authors: Daubermann, Elaine Correa; Chagas, Lucas Squarize; Gurgel, Angelo Costa; Sakurai, Sérgio Naruhiko; +4 AuthorsDaubermann, Elaine Correa; Chagas, Lucas Squarize; Gurgel, Angelo Costa; Sakurai, Sérgio Naruhiko; Daubermann, Elaine Correa; Chagas, Lucas Squarize; Gurgel, Angelo Costa; Sakurai, Sérgio Naruhiko;We investigate the hypothesis that the conversion of forest and pasture land to cropland in Brazil decreases yields by 50%. Such hypothesis is being used by the California Air Resource Board to estimate the greenhouse gas emissions from indirect land use changes due to the expansion of biofuels production. We formulate several econometric models to test such hypothesis. The results from the majority of the models indicate that yields do not decrease under the expansion of cropland area in the country, or the decrease in yields is very small. Therefore, our results indicate the need for revising and correcting the parameters in the Californian low carbon emissions policy.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2022 PortugalAuthors: Serra, Ricardo João Matos;Dissertação de Mestrado em Engenharia Eletrotécnica e de Computadores apresentada à Faculdade de Ciências e Tecnologia The evolution of society, its demographic growth, and its technological and economic development made electricity an essential good, causing the consumption of electricity to increase over the years, to guarantee these supply fossil fuels were used in its production an unsustainable option that has generated high levels of pollution and a climate crisis. To address these problems, the European Union established the European Directive 2018/2001. This directive allows renewable energy self-consumers to produce, consume, share, store and sell electricity, promoting various sustainable behaviors such as reducing energy bills, reducing CO2 emissions, combating energy poverty, and reducing the cost of energy—initial investment. This dissertation aims to develop different methodologies for defining the sharing coefficients of energy produced in a CER and to establish comparisons of their performance in the CER. The CER used as a case study in this dissertation is composed of two schools in Coimbra and the DEEC building. In a preliminary analysis of the consumption of each building, several simulations were carried out to find out which would be the best location of production in the CER, having that choice fell on school 1. Five methods were developed to define the coefficients of sharing the surplus energy produced by the CER by its members. In key 1, fixed coefficient, a fixed percentage of energy sharing is assigned, in key 2 the sharing coefficients are proportional to the consumption of each user, that is, members who have higher consumption receive a greater percentage of energy. Keys 3, 4, and 5 all have the same energy sharing philosophy, they follow a list of priorities, with energy sharing being done by serving the highest priorities until they run out of energy or all members of the list see their consumption needs. satisfied. According to the results obtained, it was possible to conclude that the best key or the most beneficial key for this particular CER would be key 3, as it generates less unused surplus energy and still has good equity, that is, it is energy effectively used annually by CER members, one member, in this case, uses 58% and another 42%.In short, to choose the distribution key that optimizes the sharing of surplus energy in a community, we must consider the community, since each key has its advantages and disadvantages, and its use varies according to the CER. A evolução da sociedade, o seu crescimento demográfico e o seu desenvolvimento tecnológico e económico, tornou a eletricidade um bem essencial, fazendo com que o consumo de energia elétrica aumentasse ao longo dos anos, para garantir esta oferta foram utilizados combustíveis fósseis na sua produção, uma opção não sustentável que gerou elevados níveis de poluição e uma crise climática. Para colmatar esses problemas a União Europeia estabeleceu a Diretiva Europeia 2018/2001. Essa diretiva permite aos autoconsumidores de energia renovável produzir, consumir, partilhar, armazenar e vender eletricidade, promovendo diversos comportamentos sustentáveis como redução na fatura energética, a redução das emissões de CO2, combate à pobreza energética e consequentemente a redução no custo do investimento inicial. A presente dissertação tem como objetivo desenvolver diversas metodologias de definição dos coeficientes de partilha de energia produzida numa CER e estabelecer comparações do seu desempenho na CER. A CER usada como estudo de caso nesta dissertação é composta por dois estabelecimentos escolares de Coimbra e pelo edifício do DEEC. Numa análise preliminar dos consumos de cada edifício, realizou-se várias simulações para descobrir qual seria a melhor localização da produção na CER, tendo essa escolha recaído na escola 1. Foram desenvolvidos cinco métodos para definição dos coeficientes de partilha da energia excedentária produzida pela CER pelos membros da mesma. Na chave 1, coeficiente fixo, é atribuída uma percentagem fixa de partilha de energia, na chave 2 os coeficientes de partilha são proporcionais ao consumo de cada utilizador, ou seja, membros que tenham maior consumo recebem uma maior percentagem de energia. Já as chaves 3, 4, 5 têm todas a mesma filosofia de partilha de energia, seguem uma lista de prioridades, sendo a partilha de energia feita servindo os mais prioritários até esgotar a energia ou todos os membros da lista vejam as suas necessidades de consumo satisfeitas. De acordo com os resultados obtidos foi possível concluir que a melhor chave ou a chave mais benéfica para esta a CER em particular seria a chave 3, por gerar menos energia excedentária não utilizada e mesmo assim ter uma boa equidade, ou seja, é a energia efetivamente utilizada anualmente pelos membros da CER, um membro, neste caso, utiliza 58% e outro 42%. Em suma, para se escolher a chave de repartição que otimiza a partilha da energia excedentária duma comunidade, devemos ter em consideração a comunidade, visto que, cada chave tem as suas vantagens e desvantagens e a sua utilização varia de acordo com a CER.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023Publisher:Zenodo Authors: SOUZA, José Arilson de; RODRIGUES, Raimundo Nonato;The Constitutional Financing Fund of the North (FNO), created through the Constitutional Funds, has the objective of promoting the development of the North Region, constituting the main financial instrument of the National Policy for Regional Development (PNDR) for the reduction of regional disparities. With the growth and development of the region, new questions and concerns regarding sustainability in the business environment were generated. In this sense, the Sustainability Tripod and its extension, the Multiple Bottom Line, were proposed in order to analyze the economic, social, environmental, ethical and governance dimensions. In this sense, the present work sought to identify the reality of the dimensions of sustainability in the environment of micro and small companies of the Portal da Amazônia that used the resource of the Constitutional Fund for Financing of the North (FNO) for business development. To capture the data, a field survey was carried out with 111 companies that used FNO resources in the period from 2018 to 2022. After the survey, Excel was used for data processing and subsequent analysis. As a result, in the economic dimension, the ability of micro and small companies to expand their revenues was identified, with the responsibility of expanding the use of facilities and an integrated corporate composition to guarantee the economic life of the entity. In the environmental dimension, business actions involving the issuance of environmental licenses and their practices in the operation of the business were observed, while in the social dimension, the expansion of the supply of job openings and an organization dedicated to serving people could be seen. In the Governance dimension, actions of administrative responsibility, control and good practices by the companies interviewed were observed. Closing the context of the dimensions, ethics guides the business of micro and small companies surveyed. Responsibility with the business, both internally and externally, signals an important emphasis on this dimension. The outputs obtained provided the opportunity for theoretical generalizations regarding the confrontation of the reality described in the dimensions of sustainability in the business environment of micro and small companies of the Amazon portal and the theoretical framework that involves the theme.
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You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5281/zenodo.8327061&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
visibility 8visibility views 8 download downloads 5 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type 2014 PortugalPublisher:Associação de Pesquisadores e Estudantes Brasileiros na Catalunha (APEC) Authors: Araújo, Mariana Bezerra Moraes de; Broega, A. C.; Ribeiro, Silvana Mota;handle: 1822/34492
O presente artigo tem como objetivo fazer uma reflexão sobre a importância da sustentabilidade no âmbito da moda e o aparecimento de um novo consumidor, mais consciente e preocupado com os problemas da humanidade. Neste trabalho, será discutida a dicotomia existente entre a sustentabilidade e a moda, marcada pela efemeridade e por produtos com um ciclo de vida limitado, onde prevalece a indústria Fast Fashion. Paralelamente, observa-se o surgimento de uma nova vertente o chamado Slow Fashion. O artigo irá abordar o tema do sistema de moda e a sustentabilidade, nomeadamente, a questão dos novos consumidores e do consumo consciente. This article aims to reflect on the importance of sustainability in the context of fashion and the emergence of a new costumer more conscious and concerned about the humanity problems. In this work, we will discuss the dichotomy between sustainability and fashion, marked by ephemerality and products with a limited life cycle where the fast fashion industry prevails. In parallel, we observe the emergence of a new effect called slow fashion. The article will address the theme of fashion system and sustainability, also the issue of new consumers and conscious consumption will be discussed. ISBN 978-84-697-0700-5
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMConference object . 2014Data sources: Universidade do Minho: RepositoriUMUniversidade do Minho: RepositoriUMOther literature type . 2014Data sources: Universidade do Minho: RepositoriUMadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=1822/34492&type=result"></script>'); --> </script>
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visibility 4Kvisibility views 3,966 download downloads 2,027 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMConference object . 2014Data sources: Universidade do Minho: RepositoriUMUniversidade do Minho: RepositoriUMOther literature type . 2014Data sources: Universidade do Minho: RepositoriUMadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2016 PortugalAuthors: Silva, Paulo Rôlo da;Nos nossos dias, a segurança energética europeia depende muito das dinâmicas regionais das suas fronteiras a norte e a sul, bem como das dimensões de segurança compreendidas pelos seus vizinhos e parceiros. Nesta dissertação é analisada a hipótese de que a segurança energética europeia não é possível de ser alcançada unicamente através da diversificação de fornecedores e rotas de abastecimento, mas que também é necessário atribuir-lhe uma dimensão de segurança regional. Neste contexto, é apresentada a região do mar Mediterrâneo como sendo detentora dos recursos necessários para complementar as linhas de abastecimento energético europeu, analisando a capacidade de desenvolvimento das energias alternativas nesta região capazes de responderem aos elevados consumos energéticos da União Europeia. Nowadays, European energy security largely depends on the regional dynamics of its borders to the North and South, as well as the dimensions of security understood by its neighbours and partners. In this dissertation it’s examined the hypothesis that European energy security cannot be achieved solely through the diversification of suppliers and supply routes, but that it is also necessary to attribute it with a dimension of regional security. In this context, the Mediterranean Sea region is presented as being the holder of the resources needed to complement the European energy supply lines, analyzing the ability of the development of alternative energies in the region able to respond to the high energy consumption of the European Union.
Repositório da Unive... arrow_drop_down Repositório da Universidade Nova de LisboaMaster thesis . 2016Data sources: Repositório da Universidade Nova de Lisboaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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visibility 99visibility views 99 download downloads 218 Powered bymore_vert Repositório da Unive... arrow_drop_down Repositório da Universidade Nova de LisboaMaster thesis . 2016Data sources: Repositório da Universidade Nova de Lisboaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______1437::7f7cb772592a6f79c089905d765f9fea&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object 2018 PortugalPublisher:Universidad Santiago de Cali Publicaciones Authors: Silva, Marcus; Leite, Vicente; Araújo, Paulo Henrique Alves de; Simões, Ananda Thomaz; +3 AuthorsSilva, Marcus; Leite, Vicente; Araújo, Paulo Henrique Alves de; Simões, Ananda Thomaz; Dalmarco, Iago de Camargo; Ferreira, Ângela P.; Queijo, Luís;This paper presents the complete design of a self-sustainable microgrid based on renewable energy sources - pico-hydro and photovoltaic - for the House of Silk museum. This on grid solution is based on the SMA Flexible Storage System using innovative technologies for energy production, storage and. The microgrid is based on a cluster of three battery inverters which establish a three-phase supplying system. The hydro energy is generated using a low head, pico-hydro propeller turbine, and a horizontal wheel of a mill. Both are tied to the microgrid through an innovative solution, connecting generators to photovoltaic inverters. The photovoltaic energy is produced by means of highperformance photovoltaic conventional modules that will be mounted on the roof of the House of Silk and the components of hydropower generation will be installed inside the gallery of a former mill. info:eu-repo/semantics/publishedVersion
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You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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