<p>Detta är ett examensarbete som genomförts hos Göteborg Energi AB och syftar till att utreda omkryogen uppgradering av biogas med fördel kan ske genom att producera nödvändig kyla medvärmedriven absorptionskylmaskin. Göteborg Energi är en av tre parter som tillsammans ska bygga enbiogasanläggning i Lidköping som ska vara i drift 2010. Anläggningen ska producera 30 GWhflytande biogas per år.</p><p>Arbetet utreder om det är fördelaktigt ur ekonomiskt, energimässigt och miljömässigt perspektiv attuppgradera biogas med kryogen teknik med värmeproducerad kyla. En jämförelse görs först medkryogen teknik där kylan är producerad med el och sen med andra uppgraderingstekniker. Som stödhar två olika processimuleringsprogram används, Hysys och DESIGN II.</p><p>Resultatet visar att energianvändningen ökar då värmedriven kyla används i jämförelse med kylaproducerad med el. 0,47 kW/Nm3 rågas för kryo med absorptionskyla och 0,29 kW/Nm3 rågas medel. Om det finns avsättning för spillvärmen kan energianvändningen i uppgraderingen minska till 0,29kW/Nm3 rågas och 0,15 kW/Nm3 rågas för systemet med värmedriven respektive eldriven kyla. Ijämförelse med andra uppgraderingstekniker ligger 0,47 kW/Nm3 bland de teknikerna med högstenergianvändning medans 0,29 kW/Nm3 placerar sig bland de teknikerna med lägstenergianvändning.</p><p>Resultat visar att klimatpåverkan från uppgraderingen, som kommer av metanslip och elanvändningen,minskar marginellt om kylan produceras med värme istället för el. Resultatet varierar mycket beroendepå hur koldioxidutsläppen från marginalelen beräknas. I jämförelse med andra uppgraderingsteknikerligger kryo lägre än de flesta andra. Undantaget är COOAB-tekniken som är överlägset bäst tack varalågt metanslip och liten elanvändning.</p><p>Ekonomisk jämförelse med andra uppgraderingstekniker visar att kostnaden för energianvändningenligger i samma nivå som övriga uppgraderingstekniker i jämförelsen, ca 0,03 kr/kWh uppgraderad gas.Om det finns avsättning för spillvärmen sjunker kostnaden till 0,024 och 0,02 kr/kWh uppgraderad gasför kryoteknik med kyla ifrån värme respektive el.</p><p>Min slutsats är att utnyttjande av spillvärmen är av stor vikt för att få god ekonomi och lågenergianvändning med kryogen uppgradering. En marginellt förbättrad miljöprestanda kan erhållas omnödvändig kyla produceras med värme istället för el då kryogen uppgradering används. Annars är detalltid mer fördelaktigt att använda el för att producera nödvändig kyla.</p> / <p>This is a master thesis that has been carried out at Göteborg Energi AB. It refers to investigate ifcryogenic upgrading of biogas with advantage can be done by producing necessary cold with a heatdriven absorption cooling machine. Göteborg Energi is one of three actors that together will build abiogas plant in Lidköping that will be up and running in 2010. The plant will produce 30 GWhliquefied biogas annually.</p><p>This thesis investigastes whether it is advantageous, to upgrade biogas with heat driven cooling, in aperspective of economy, energy use and environment. It compares cryogenic upgrading with coldproduced by electricity, but also by other techniques. Two different process simulation softwares havebeen used as support to this thesis; Hysys and DESIGN II.</p><p>The result shows that energy usage increases when the necessary cold is produced with heat instead ofelectricity; 0,47 kW/Nm3 rawgas for cryo upgrade with absorptions cooling and 0,29 kW/Nm3 rawgaswith cold produced by electricity. If it’s possible to use the waste heat to warm the digester, the energyconsumption for the upgrading can be reduced to 0,29 kW/Nm3 for the system with heat-driven cold,and 0,15 kW/Nm3 rawgas for cold produced by electricity. In comparison with other techniques forupgrading, 0,47 kW/Nm3 rawgas is a high value while 0,29 kW/Nm3 rawgas is among the lowestvalues for energy use.</p><p>The impact on the climate emerges from the use of electricity and when methane slips out from theupgrading plant. The result shows that the impact on the climate is slightly decreased for cryogenicupgrading when the cold is produced with a heat driven absorption machine instead of electricity. Theresult varies a lot due to how one calculate the emission of carbon dioxide from the electricity on themargin. In comparison with other upgrading techniques, the climate impact from cryogenic upgradingis less, other than the COOAB-technique that is superior because of its low methane slip and lowdemand of electricity.</p><p>An economical comparison shows that the cost for energy usage is about the same for cryogenic as forother techniques; approximately 0,03 SEK/kWh upgraded gas. If one can utilize the waste heat, thecost would be decreased to 0,024 and 0,02 SEK/kWh upgraded gas for the system with cryogenicupgrading with cooling from absorption machine respectively cooling produced with electricity.</p><p>My conclusion is that the utilization of the waste heat is essential if one wishes to get good economyand low energy use for the upgrading of biogas with cryogenic methods. A slightly increasedenvironmental improvement can be received if one change the cold production from electricity to heat,otherwise it is always more advantageous to use electricity for cryogenic methods.</p>

Detta är ett examensarbete som genomförts hos Göteborg Energi AB och syftar till att utreda omkryogen uppgradering av biogas med fördel kan ske genom att producera nödvändig kyla medvärmedriven absorptionskylmaskin. Göteborg Energi är en av tre parter som tillsammans ska bygga enbiogasanläggning i Lidköping som ska vara i drift 2010. Anläggningen ska producera 30 GWhflytande biogas per år. Arbetet utreder om det är fördelaktigt ur ekonomiskt, energimässigt och miljömässigt perspektiv attuppgradera biogas med kryogen teknik med värmeproducerad kyla. En jämförelse görs först medkryogen teknik där kylan är producerad med el och sen med andra uppgraderingstekniker. Som stödhar två olika processimuleringsprogram används, Hysys och DESIGN II. Resultatet visar att energianvändningen ökar då värmedriven kyla används i jämförelse med kylaproducerad med el. 0,47 kW/Nm3 rågas för kryo med absorptionskyla och 0,29 kW/Nm3 rågas medel. Om det finns avsättning för spillvärmen kan energianvändningen i uppgraderingen minska till 0,29kW/Nm3 rågas och 0,15 kW/Nm3 rågas för systemet med värmedriven respektive eldriven kyla. Ijämförelse med andra uppgraderingstekniker ligger 0,47 kW/Nm3 bland de teknikerna med högstenergianvändning medans 0,29 kW/Nm3 placerar sig bland de teknikerna med lägstenergianvändning. Resultat visar att klimatpåverkan från uppgraderingen, som kommer av metanslip och elanvändningen,minskar marginellt om kylan produceras med värme istället för el. Resultatet varierar mycket beroendepå hur koldioxidutsläppen från marginalelen beräknas. I jämförelse med andra uppgraderingsteknikerligger kryo lägre än de flesta andra. Undantaget är COOAB-tekniken som är överlägset bäst tack varalågt metanslip och liten elanvändning. Ekonomisk jämförelse med andra uppgraderingstekniker visar att kostnaden för energianvändningenligger i samma nivå som övriga uppgraderingstekniker i jämförelsen, ca 0,03 kr/kWh uppgraderad gas.Om det finns avsättning för spillvärmen sjunker kostnaden till 0,024 och 0,02 kr/kWh uppgraderad gasför kryoteknik med kyla ifrån värme respektive el. Min slutsats är att utnyttjande av spillvärmen är av stor vikt för att få god ekonomi och lågenergianvändning med kryogen uppgradering. En marginellt förbättrad miljöprestanda kan erhållas omnödvändig kyla produceras med värme istället för el då kryogen uppgradering används. Annars är detalltid mer fördelaktigt att använda el för att producera nödvändig kyla. / This is a master thesis that has been carried out at Göteborg Energi AB. It refers to investigate ifcryogenic upgrading of biogas with advantage can be done by producing necessary cold with a heatdriven absorption cooling machine. Göteborg Energi is one of three actors that together will build abiogas plant in Lidköping that will be up and running in 2010. The plant will produce 30 GWhliquefied biogas annually. This thesis investigastes whether it is advantageous, to upgrade biogas with heat driven cooling, in aperspective of economy, energy use and environment. It compares cryogenic upgrading with coldproduced by electricity, but also by other techniques. Two different process simulation softwares havebeen used as support to this thesis; Hysys and DESIGN II. The result shows that energy usage increases when the necessary cold is produced with heat instead ofelectricity; 0,47 kW/Nm3 rawgas for cryo upgrade with absorptions cooling and 0,29 kW/Nm3 rawgaswith cold produced by electricity. If it’s possible to use the waste heat to warm the digester, the energyconsumption for the upgrading can be reduced to 0,29 kW/Nm3 for the system with heat-driven cold,and 0,15 kW/Nm3 rawgas for cold produced by electricity. In comparison with other techniques forupgrading, 0,47 kW/Nm3 rawgas is a high value while 0,29 kW/Nm3 rawgas is among the lowestvalues for energy use. The impact on the climate emerges from the use of electricity and when methane slips out from theupgrading plant. The result shows that the impact on the climate is slightly decreased for cryogenicupgrading when the cold is produced with a heat driven absorption machine instead of electricity. Theresult varies a lot due to how one calculate the emission of carbon dioxide from the electricity on themargin. In comparison with other upgrading techniques, the climate impact from cryogenic upgradingis less, other than the COOAB-technique that is superior because of its low methane slip and lowdemand of electricity. An economical comparison shows that the cost for energy usage is about the same for cryogenic as forother techniques; approximately 0,03 SEK/kWh upgraded gas. If one can utilize the waste heat, thecost would be decreased to 0,024 and 0,02 SEK/kWh upgraded gas for the system with cryogenicupgrading with cooling from absorption machine respectively cooling produced with electricity. My conclusion is that the utilization of the waste heat is essential if one wishes to get good economyand low energy use for the upgrading of biogas with cryogenic methods. A slightly increasedenvironmental improvement can be received if one change the cold production from electricity to heat,otherwise it is always more advantageous to use electricity for cryogenic methods.

Bakgrund och problem: Miljön påverkas av många olika faktorer där både företag, offentliga verksamheter och enskilda individer kan ha en stor negativ påverkan. Genom att offentliga verksamheter är stora ekonomiska aktörer har de ett stort ansvar för att minska dess miljöpåverkan och genom denna roll påverka andra till mer miljömässigt arbete. Bland annat har kommuners omfattande verksamheter både en direkt och en indirekt påverkan på miljön till följd av alla de resurser som spenderas för att utveckla samhället och förbättra människors välfärd. Miljömässiga prestationsmätningar inom den offentliga sektorn har med tiden blivit allt vanligare. Dock poängterar flera forskare att det inte är tillräckligt att man enbart har dessa prestationsmått utan att de också bör användas i verksamheten. Med utgångspunkt i detta var det därmed intressant att studera hur och varför politiker och chefstjänstemän i kommuner använder sig av information från miljömässiga prestationsmätningar. Vidare är politiker och chefstjänstemän beroende av varandra på flera olika sätt, framför allt för att bistå varandra med bland annat information, beslut och mål varpå det blev intressant att studera hur information från miljömässiga prestationsmätningar kommuniceras mellan dessa aktörer. Syfte: Syftet med studien är att undersöka och skapa en ökad förståelse och kunskap för hur och varför politiker samt chefstjänstemän inom svenska kommuner använder sig av information från miljömässiga prestationsmätningar samt hur information från de miljömässiga prestationsmätningarna kommuniceras mellan politikerna och chefstjänstemännen. Metod: I denna studie har en fallstudie som metod legat till grund för den forskning som gjorts. Det teoretiska materialet har samlats in genom tidigare gjord forskning och det empiriska materialet har samlats in genom semi-strukturerade intervjuer. Slutsats: Utifrån studiens resultat har det konstaterats att politiker och chefstjänstemän använder information från miljömässiga prestationsmätningar både internt och externt där den vanligaste användningen är vid utvärdering. Dock används informationen olika mycket och där vissa inte använder sig av informationen alls. Majoriteten av politikerna använder även informationen för att visa ansvarstagande för externa intressenter, varpå det även konstateras att användningen kan bero på legitimitetsskapande. Användningen beror även på hur prioriterad miljöfrågan är i kommunerna samt ifall användarna anser miljömål samt miljömässiga prestationsmått vara diffusa och oklara. En högre prioritering av miljöfrågor är även en vital aspekt till att information från miljömässiga prestationsmätningar används. En mer frekvent kommunikation av miljömässiga mål och mått leder i sin tur även till en högre användning av de miljömässiga prestationsmåtten. / Background: The environment is affected by a various of factors where companies, public sector organizations and individuals are the reason for a major negative impact of it. By public sector organizations being a major economic actor, they also have a major responsibility to reduce their environmental impact and through this role influence other actors to act toward a better environmental work. The comprehensive municipal organizations both have a direct and indirect impact on the environment as a result of all the resources spent on developing society and improving people's welfare. Also, environmental performance measurements in the public sector have become more common. However, several researchers argue that it is not only enough to collect these performance measurements without using it in the organization. It was therefore interesting to study how and why politicians and managers in municipalities use information from environmental performance measurements. In addition, politicians and managers are dependent of each other in a variety of ways, primarily to assist each other with information, decisions and goals, among which it became interesting to study how environmental goals and information from environmental performance measurements are communicated between these actors. Purpose: The purpose of the study is to investigate and create a better understanding of how and why politicians and managers in Swedish municipalities use information from environmental performance measurements and how information from environmental performance measurements is communicated between these politicians and managers. Methods: A case study as a methodology has been the basis for the research conducted. Information has been collected through previous research and semi-structured interviews. Conclusion: Based on the results of the study, it has been found that politicians and managers in Swedish municipalities use information from environmental performance measurements both internally and externally and where the most common use is by evaluating the information. However, the information is used in a variying extent, while some do not use the information at all. The majority of politicians also use the information to show responsibility for external stakeholders, as well as the fact that the use may be due to increasing legitimacy. The use also depends on how environmental issues are prioritized in the municipalities, and if the users consider environmental goals and environmental performance measures to be diffuse and unclear. A higher priority of environmental issues is also a important aspect of using information from environmental performance measurements. A more frequent communication of environmental goals and measures also leads to a higher use of environmental performance measures.

Este trabalho abrangeu uma avaliação comparativa do desempenho ambiental de dois materiais: o painel de madeira e o painel multilaminar, usados na fabricação de caixas de carga de semi-reboques para o transporte de grãos. A avaliação de desempenho ambiental contemplou as etapas de manufatura, uso e descarte dos painéis. O estudo envolveu a caracterização dos dois processos produtivos, a realização de um balanço de massa, o levantamento do consumo de água e energia de cada processo e uma avaliação ambiental final através da ferramenta de análise de ciclo de vida (ACV). O balanço de massa permitiu avaliar o processo produtivo, e a ACV permitiu avaliar os impactos relativos aos insumos e materiais empregados, o uso e desempenho do produto e opções de descarte após o fim de sua vida útil. O painel multilaminar apresentou melhor desempenho ambiental geral em relação ao painel de madeira, considerando os aspectos avaliados nas diferentes etapas. O material multilaminar oferece aos painéis maior durabilidade, implicando um menor número de reposições para cumprir a mesma unidade funcional. Este aspecto ficou evidenciado na ACV como sendo um fator importante, já que houve menor geração de impacto. Para que a metodologia possa ter plena aplicação na seleção de materiais com atributos ambientais mais adequados, fazem-se necessárias a uniformização dos procedimentos de elaboração dos inventários de ACV e a obtenção de dados nacionais. Este trabalho mostrou a exiqüibilidade de se avaliar o desempenho ambiental de caixas de carga. / Submitted by Marcelo Teixeira (mvteixeira@ucs.br) on 2014-05-19T16:08:42Z No. of bitstreams: 1 Dissertacao Luciane Sartori.pdf: 5271958 bytes, checksum: 45775915a88081b5704a79180a0fd94a (MD5) / Made available in DSpace on 2014-05-19T16:08:42Z (GMT). No. of bitstreams: 1 Dissertacao Luciane Sartori.pdf: 5271958 bytes, checksum: 45775915a88081b5704a79180a0fd94a (MD5) / This work presents a comparative evaluation of the environmental performance of two materials: a wood panel and a three layers synthetic panel, both used in the production of the load box of semi-trailer for grains transportation. The evaluation of the environmental performance contemplated the stages of manufacture, use and discarting of the panels. The study involved the characterization of the productive processes of both panels, the accomplishment of a mass balance, the survey of the water and energy consumption of each process and a final environmental performance evaluation using the life cycle assessment (LCA) tool. The mass balance allowed to evaluate the productive process itself, and the LCA, allowed to evaluate the relative impacts related to the insums and materials used, performance of the product and options for discarting after the end of its useful life. The three layers synthetic panel presented better general environmental performance in relation to the wood panel, considering the aspects evaluated in the different stages. The synthetic panel material offers bigger durability for the load box, implying a less number of replacements to fulfill the same functional unit. This aspect was evidenced by LCA as being an important factor, since it had minor impact generation. In order for the methodology to be applicable for the selection of materials with adequate environmental attributes, it is necessary an uniformization of the procedures for the LCA inventory and the creation of national database. This work showed the feasibility of environmental performance of the load box.

Made available in DSpace on 2014-12-17T14:09:16Z (GMT). No. of bitstreams: 1 JesusLSA_TESE_CAPA_pag143.pdf: 3891956 bytes, checksum: 979c7822b8f806860f7665c2bf39650c (MD5) Previous issue date: 2013-04-08 / A legisla??o ambiental e os principais agentes que se relacionam com a empresa se constituem em fatores ex?genos que n?o podem ser negligenciados ao formular-se e avaliar-se a pol?tica ambiental corporativa. As influ?ncias ex?genas e seus efeitos sobre a gest?o ambiental e o gerenciamento de projetos de explora??o e produ??o (E&P) e, por essa via, sobre o desempenho ambiental, foram objetos de estudo desta tese. Embora o desempenho ambiental seja um assunto relevante, a pesquisa sobre esse tema ainda ? escassa. Tal car?ncia desponta ainda mais acentuada quando se aborda o desempenho ambiental de projetos na ind?stria de petr?leo e g?s. O principal objetivo deste estudo foi avaliar a rela??o entre a legisla??o ambiental vigente, as a??es de ?rg?os reguladores, fornecedores, empresas terceirizadas e comunidades locais e o desempenho ambiental dos projetos de E&P na ind?stria de petr?leo e g?s e, tamb?m, analisar os efeitos do sistema de gest?o ambiental e o gerenciamento dos projetos sobre tal desempenho. Na fase abdutiva, foi conduzido um estudo de caso com abordagem qualitativa em uma grande empresa brasileira do setor de petr?leo e g?s, na fase dedutiva, foi realizada uma pesquisa survey explanat?ria de corte transversal com abordagem quantitativa, incluindo 113 projetos de E&P de cinco unidades executoras da empresa. Foi formulado um modelo conceitual, com cinco construtos e sete hip?teses de pesquisa, representativo dos efeitos de fatores externos sobre o desempenho ambiental dos projetos de E&P. Os dados foram tratados aplicando a An?lise Fatorial Explorat?ria e a Modelagem de Equa??es Estruturais com aplica??o dos softwares IBM? SPSS? Statistics 20.0 e IBM? SPSS? Amos 18.0. O modelo de equa??es estruturais foi reespecificado e estimado utilizando o m?todo de M?xima Verossimilhan?a e o procedimento bootstrap com 2000 reamostragens, at? alcan?ar adequados valores dos ?ndices de ajustamento. O modelo mostrou boa ader?ncia ?s evid?ncias emp?ricas, representando uma teoria explicativa dos fatores que influenciam o desempenho ambiental dos projetos de E&P na empresa estudada. As estat?sticas descritivas apontaram adequado desempenho dos projetos de E&P com rela??o aos efluentes descartados, volume de ?gua reutilizada, redu??o de res?duos e pr?ticas de reciclagem. Identificou-se que projetos de maior porte alcan?am melhor desempenho ambiental em rela??o aos de menor tamanho. N?o foram achadas diferen?as significativas entre os desempenhos de projetos executados por unidades operacionais distintas. Os resultados da modelagem indicaram que nem a legisla??o ambiental, nem os agentes externos exercem influ?ncia significativa sobre a sistem?tica da gest?o dos projetos de E&P. Os agentes externos atuam sobre a gest?o ambiental da empresa exercitando capacidades colaborativas, obstrutivas e propositivas. A legisla??o ambiental ? percebida como entrave ao desenvolvimento dos projetos ao longo de seu ciclo de vida, principalmente, pelas defici?ncias dos ?rg?os ambientais. Identificou-se que o sistema de gest?o ambiental influencia diretamente o Programa de Desenvolvimento e Execu??o de Projetos de E&P, que, por sua vez, provoca efeitos diretos e indiretos sobre o desempenho ambiental. Finalmente, comprovou-se que o Sistema de Gest?o Ambiental da empresa ? determinante para o desempenho ambiental dos projetos de E&P, tanto pelos seus efeitos diretos, como pelos indiretos, estes ?ltimos mediados pela sistem?tica de gest?o dos projetos de E&P

No que toca à avaliação de sistemas construtivos, a análise dos sistemas existentes para certificação ambiental de edifícios revela que há raras ferramentas que avaliam desempenho ambiental objetiva e holisticamente por Análise do Ciclo de Vida (ACV), predominando o reconhecimento de atributos de produtos e, desta forma, perdendo-se a noção global do impacto. Dentre as principais dificuldades encontradas para o uso da ACV em sistemas construtivos, encontra-se a escassez de dados de inventário disponíveis para sistemas construtivos no cenário brasileiro, o que torna a aplicação da metodologia ainda mais complexa e demorada. Por outro lado, bancos de dados internacionais dispõem de uma quantidade considerável de informações, as quais são muitas vezes utilizadas para estudos realizados dirigindo-se ao contexto brasileiro. Assim, esta pesquisa buscou responder às seguintes questões: a) se coletados para processos idênticos, os dados disponíveis em bases de dados internacionais validadas devem levar a resultados similares àqueles obtidos por estudos baseados em dados primários coletados no contexto brasileiro?; b) As metodologias de avaliação de impacto disponíveis na atualidade são capazes de avaliar de forma completa e consistente os principais potenciais de impacto derivados do ciclo de vida de materiais de construção tradicionais? Com isso o objetivo desta pesquisa foi avaliar a sensibilidade dos resultados de um estudo comparativo de ACV à utilização de dados secundários (provenientes de bases de dados europeias) ou dados primários (coletados no contexto brasileiro), assim como à utilização de diferentes metodologias de Avaliação de Impacto de Ciclo de Vida (AICV), identificando as categorias de impacto de contribuição mais significativa na avaliação de sistemas construtivos tradicionais, pela aplicação da metodologia em um estudo de caso. Os resultados demonstraram que o escopo geográfico das fontes de dados, assim como as possibilidades de escolha entre diferentes metodologias de AICV constituem pontos de grande sensibilidade dos estudos de ACV, os quais devem ser detalhadamente avaliados e descritos, de forma a se evitar resultados enganosos. Além disso, o desenvolvimento de categorias direcionadas especificamente aos impactos das atividades de mineração apresentou-se como uma importante demanda para futuros desenvolvimentos. / Regarding the evaluation of building systems, the analysis of existing buildings environmental certification systems reveals that there are few tools to evaluate environmental performance objectively and holistically through Life Cycle Analysis (LCA) predominating the product attributes recognition and thus losing the global perspective of impacts. Among the main difficulties encountered in the application of LCA in building systems, lies the lack of inventory data available for building systems in the Brazilian scene, which makes the application of the methodology even more complex and time consuming. In the other hand, international databases provide a considerable amount of information, which are often used for studies addressing the Brazilian context. Thus, this research aimed to answer the following questions: a) whether collected for identical processes, the data available in the international validated databases would lead to results similar to those obtained by studies based on primary data collected in the Brazilian context? b) Are the impact assessment methodologies currently available able to fully and consistently evaluate the main potential impacts derived from the lifecycle of traditional building materials? Therefore, the objective of this research was to perform a sensitivity analysis of the results of a comparative LCA case study to the use of secondary data (provided by European databases) or primary data (collected in the Brazilian context), as well as the use of different Life Cycle Impact Assessment (LCIA) methodologies, identifying the impact categories of most significant contribution in the evaluation of traditional construction systems, through the application of the methodology in a case study. The results showed that the geographic scope of the data sources and the choice among different LCIA methods are points of high sensitivity of LCA studies, which must be evaluated and described in detail to avoid misleading conclusions. Furthermore, the development of an LCIA category addressing impacts of mining activities was presented as the main demand for future developments.

Este trabalho abrangeu uma avaliação comparativa do desempenho ambiental de dois materiais: o painel de madeira e o painel multilaminar, usados na fabricação de caixas de carga de semi-reboques para o transporte de grãos. A avaliação de desempenho ambiental contemplou as etapas de manufatura, uso e descarte dos painéis. O estudo envolveu a caracterização dos dois processos produtivos, a realização de um balanço de massa, o levantamento do consumo de água e energia de cada processo e uma avaliação ambiental final através da ferramenta de análise de ciclo de vida (ACV). O balanço de massa permitiu avaliar o processo produtivo, e a ACV permitiu avaliar os impactos relativos aos insumos e materiais empregados, o uso e desempenho do produto e opções de descarte após o fim de sua vida útil. O painel multilaminar apresentou melhor desempenho ambiental geral em relação ao painel de madeira, considerando os aspectos avaliados nas diferentes etapas. O material multilaminar oferece aos painéis maior durabilidade, implicando um menor número de reposições para cumprir a mesma unidade funcional. Este aspecto ficou evidenciado na ACV como sendo um fator importante, já que houve menor geração de impacto. Para que a metodologia possa ter plena aplicação na seleção de materiais com atributos ambientais mais adequados, fazem-se necessárias a uniformização dos procedimentos de elaboração dos inventários de ACV e a obtenção de dados nacionais. Este trabalho mostrou a exiqüibilidade de se avaliar o desempenho ambiental de caixas de carga. / This work presents a comparative evaluation of the environmental performance of two materials: a wood panel and a three layers synthetic panel, both used in the production of the load box of semi-trailer for grains transportation. The evaluation of the environmental performance contemplated the stages of manufacture, use and discarting of the panels. The study involved the characterization of the productive processes of both panels, the accomplishment of a mass balance, the survey of the water and energy consumption of each process and a final environmental performance evaluation using the life cycle assessment (LCA) tool. The mass balance allowed to evaluate the productive process itself, and the LCA, allowed to evaluate the relative impacts related to the insums and materials used, performance of the product and options for discarting after the end of its useful life. The three layers synthetic panel presented better general environmental performance in relation to the wood panel, considering the aspects evaluated in the different stages. The synthetic panel material offers bigger durability for the load box, implying a less number of replacements to fulfill the same functional unit. This aspect was evidenced by LCA as being an important factor, since it had minor impact generation. In order for the methodology to be applicable for the selection of materials with adequate environmental attributes, it is necessary an uniformization of the procedures for the LCA inventory and the creation of national database. This work showed the feasibility of environmental performance of the load box.

A presente pesquisa procura contribuir para a Gestão Ambiental Municipal através dos seguintes objetivos: a investigação dos problemas ambientais em uma cidade de médio porte, São Carlos, e a viabilidade de aplicação do modelo de Sistema de Gestão Ambiental proposto pela ISO 14001, na Prefeitura da mesma cidade. O levantamento dos problemas ambientais munucipais foi feito através do uso de indicadores ambientais, baseados em algumas diretrizes estipuladas pela ISO 14031 - Avaliação do Desempenho Ambiental (ADA). Esta etapa do estudo foi comprometida pela carência de valores de referência, para a maioria dos indicadores urbanos, considerando as particularidades das cidades. Apesar disto foi possível conhecer a dinâmica e alguns problemas ambientais municipais. Já a viabilidade de aplicação da ISO 14001 na Prefeitura, foi estudada através da aplicação de questionário em diversas Secretarias Municipais, abordando procedimentos comuns em um Sistema de Gestão Geral e um Sistema de Gestão Ambiental. Foi constatado que apesar da existência de alguns procedimentos bem desenvolvidos na Prefeitura de São Carlos, a maioria não está completamente implantada. / The goal of this work was to contribute to Municipal Environmental Management assessing the following aspects: the investigation of the environmental problems of a medium sized city, São Carlos, and determining if an environmental management system based on ISO 14001 could be applied to the Prefecture of this city. The investigation of the environmental problems was carried out using environmental indicators, based on guidelines stated in the ISO 14031 - Environmental Performance Evaluation (EPE). This stage was compromised by a lack of reference values, for most urban indicators, considering cities\' particularities. But this stage allowed us to know the process of some environmental problems. The application of ISO 14001 at São Carlos Prefecture was assessed using a questionnaire addressing common procedures of both the General Management System and the Environmental Management System. Although the existance of some well implemented procedures in São Carlos Prefecture was detected, the majority of then was not fully implemented.

O concreto armado, sistema estrutural mais utilizado no mundo, consome grandes quantidades de matérias-primas, em sua maioria compostas por materiais não renováveis, além de enormes quantidades de água e depende de grande quantidade de energia para o seu beneficiamento, além de emissões de gases e produção de resíduos perigosos. As decisões de projeto, enter elas a localização das obras, a definição do produto a ser construído, o partido arquitetônico e a especificação de materiais e componentes, afetam diretamente o consumo de recursos naturais e de energia, tal consumo é afetado também pela otimização ou não da execução e pelo efeito global no seu entorno, sem falar nos impactos estéticos e urbanísticos mais amplos. O objetivo desta pesquisa foi avaliar o uso da metodologia da Avaliação do Ciclo de Vida (ACV) no auxílio da tomada de decisões em projetos estruturais de concreto armado, visando a melhoria do desempenho ambiental parte-se da hipótese de que é possível obter a melhoria por meio da análise, durante a fase de projeto, da utilização de diferentes classes de resistência do concreto, por meio de alterações (reduções) nas dimensões dos elementos estruturais bem como do consumo dos materiais componentes da estrutura. Discute-se primeiramente o conceito de desempenho ambiental, seguido do impacto ambiental da construção civil e seus materiais. Posteriormente foi apresentada a metodologia da ACV e sua aplicação na construção civil com uma revisão bibliográfica. O desenvolvimento experimental efetuado foi o projeto estrutural de edifício com 6 classes de resistência característica à compressão do concreto do grupo I de resistência, à partir da classe C25 até a C50. Os resultados apresentaram que s classes C40, C45 e C50 obtiveram os C25 até a C50. OS resultados apresentaram que as classes C40, C45 e C50 obtiveram os melhores resultados em quase todos os quesitos avaliados. Especificamente a C40 se apresentou como a melhor opção para a unidade funcional avaliada com o melhor desempenho. O desenvolvimento experimental demonstrou a viabilidade do uso da ACV neste tipo de avaliação porém verifica-se a carência de maiores informações para execução de inventários e metodologia dirigida à realidade brasileira. Por fim , foram fornecidas orientações a todos os agentes intervenientes no projeto estrutural e execução da obra com a finalidade de ser alcançado o melhor desempenho ambiental das estruturas de concreto armado. / The reinforced concrete, most widely used structural system in the world, which consumes large amounts of raw materials, mostly composed of non-renewable materials, and huge amounts of water, depends on lot of energy for its processing, and gas emissions and hazardous waste generation. design decisions, such as location of works, the product definition to be built, the architectural party and specification of materials and components directly affect the consumption of natural resources and energy, as well as the optimization or not the execution and overall effect on its surroundings, not to mention the broader aesthetic and urbanistic impact. The objective of this research was to evaluate the use of the methodology of Life Cycle Assessment (LCA) to aid decision-making in structural design of reinforced concrete in order to improve the environmental performance starting from the hypothesis that can- yield improvement by analyzing, during the design stage, the use of different grades of concrete strength through changes (decreases) the dimensions of structural elements as well as the consumption of the component materials of the structure. At work was first discussed the concept of environmental performance, followed by the environmental impact of construction and its materials. The methodology of LCA and its application in construction with a literature review was presented later. The experimental development was made the building structural design with 6 classes of resistance characteristic of the group I concrete compressive strength, the class from the C25 to C50. The results showed that the C40 classes, C45 and C50 have the best results almost all the variables evaluated and specifically the C40 presented as the best option for the functional unit evaluated with the best performance. Experimental development demonstrated the feasibility of using ACV in this type of evaluation but still in need of more information for the execution of inventories and methodology will run Brazilian reality. Finally they were provided guidance to all actors involved in the structural design and execution of the work in order to be achieved the best environmental performance of reinforced concrete structures.

Il est désormais avéré que les pratiques intensives de production agricole mises en œuvre depuis les années 1960 en Europe, sont responsables de la dégradation des écosystèmes et notamment de la qualité des eaux de surface et souterraines. Afin de respecter les objectifs de résultat définis par la Directive Cadre sur l’Eau à l’échéance 2015, les gestionnaires de la ressource ont désormais ciblés prioritairement la protection des zones d’alimentation des captages. Cela nécessite une évaluation environnementale à une échelle adaptée aux mesures mises en œuvre. Ces éléments expliquent les objectifs de cette thèse, à savoir la contribution au développement de méthodes d’évaluation environnementale des activités agricoles à l’échelle des territoires, en complément de celles déjà existantes. Nous avons ainsi utilisé (i) des méthodes d’analyse et de modélisation multicritère (ELECTRE) combinées avec un système d’information géographique au niveau de petits bassins versants élémentaires de 2 à 5 km2 (sur le bassin de l’Oir, en Basse Normandie, Nord-ouest de la France et celui d’Auradé sur les Coteaux de Gascogne, Sud-ouest de la France) (ii) une approche par modélisation spatiale (dénommée PIXAL) des risques agro-environnementaux en utilisant la télédétection et un SIG, au niveau d'un grand espace à enjeu environnemental de plusieurs milliers de km2, (Coteaux de Gascogne). Dans les deux approches, nous avons montré que la combinaison de critères de vulnérabilité des eaux et de pression agricole choisis de façon pertinente, permettent d’évaluer les risques agro-environnementaux à différents niveaux d’organisation spatiale. L'évaluation à la parcelle agricole (niveau de la prise de décision par les acteurs de terrain) procure une représentation au niveau du bassin versant élémentaire. L'évaluation au pixel de l’image satellitale (Landsat 5-TM) permet une représentation à différents niveaux de bassins versants emboîtés par agrégation. En perspective, un couplage entre un modèle d'analyse multicritère avec un modèle spatial, pourrait permettre d’améliorer la performance de l’évaluation aux différents niveaux de l’action publique ou de terrain et d’apporter des éléments de réponse supplémentaires à la problématique du changement d’échelle spatiale. / There is evidence that intensive farming practices applied in Europe since the 1960s are responsible for the degradation of certain ecosystems, and a reduction in the quality of surface and ground water. Excessive use of nitrogen-based fertilisers and pesticides have led to high concentrations of these substances being found in rivers, thus compromising raw drinking water sources. Soil erosion – caused by simplified crop rotations, feeding livestock on corn instead of grass, and the removal of elements such as embankments, trees, hedges, etc. – has been conducive to the transfer of these particles into surface water. The resulting turbidity has led to the clogging up of spawning grounds, with many negative effects on their biological quality. Complementing existing approaches, this thesis will focus on the development of methods for carrying out territorial environmental analysis of farming activities. For our study, we used (i) a multicriteria analysis and modelling (ELECTRE) combined with a Geographic Information System (GIS) on a selection of small elementary watersheds (ranging in size from 2 km² to 5 km²). These were located in the Oir basin, in Lower Normandy Region, in northwest France, and the Auradé basin, in the hills of Gascony region, southwest. We also employed (ii) a spatial modelling approach (PIXAL) to represent agri-environmental risks. Applied to an environmentally-sensitive area (hills of Gascony region) of several thousand square kilometres, the PIXAL method involved evaluating agri-environmental risks through a combination of remote sensing and GIS. In both cases, we showed that choosing the most relevant criteria allows agri-environmental risks to be assessed at different organisational scales. Analysis at farm plot level (where decisions are made by stakeholders in the field) gives a representation of the elementary watershed. Pixel-based evaluation, using satellite imaging (Landsat TM5), provides a nested multi-aggregation view of different watersheds. Placing this study in perspective, coupling ELECTRE-style multicriteria analysis with a spatial model could be an effective way to improve analysis at different policy-making and territorial scales, as well as providing additional support where assessment needs to switch between those varying scales.