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Hybrid simulation and optimization approach for green intermodal transportation problem with travel time uncertaintyHrusovsky, Martin, Demir, Emrah, Jammernegg, Werner, van Woensel, Tom 09 1900 (has links) (PDF)
The increasing volumes of road transportation contribute to congestion on road, which leads to delays and other negative impacts on the reliability of transportation. Moreover, transportation is one of the main contributors to the growth of carbon dioxide equivalent emissions, where the impact of road transportation is significant. Therefore, governmental organizations and private commercial companies are looking for greener transportation solutions to eliminate the negative externalities of road transportation. In this paper, we present a novel solution framework to support the operational-level decisions for intermodal transportation networks using a combination of an optimization model and simulation. The simulation model includes stochastic elements in form of uncertain travel times, whereas the optimization model represents a deterministic and linear multi-commodity service network design formulation. The intermodal transportation plan can be optimized according to different objectives, including costs, time and CO2e emissions. The proposed approach is successfully implemented to real-life scenarios where differences in transportation plans for alternative objectives are presented. The solutions for transportation networks with up to 250 services and 20 orders show that the approach is capable of delivering reliable solutions and identifying possible disruptions and alternatives for adapting the unreliable transportation plans.
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The climate impact of different building systems : A study regarding materials in residential buildings and their environmental impactDarle, Maria, Lindqvist, Saga, Tsegai, Bezawit January 2019 (has links)
This report was done on behalf of Uppsala municipality with the aim to investigate how much the CO2-equivalent emissions differ between different building systems during the construction phase, considering the different choice of material used in the frames. Several multi-family houses with different building systems were therefore studied and compared by using previous LCA from collected climate reports regarding each construction project. Different scenarios of the residential development in Uppsala until year 2050, including multi- and single-family houses, were further on brought forward. The impact that the choice of material had on the climate was then studied by comparing the scenarios with the climate goals set up by Uppsala municipality regarding the construction sector. This was discussed in order to investigate whether Uppsala municipality would reach the climate goals or not. The conclusion of the study is that the building systems with wooden frames in general release less CO2-equivalent emissions than the ones with concrete frames. One of the reasons for this is that the production of the materials has different amounts of waste and the fact that concrete consists of cement, which causes a lot of emissions during the production of the material. Another part of the report was to investigate if climate improved concrete could decrease the CO2-equivalent emissions from building systems with concrete frames. This was done by doing a case-study, where parts of the concrete frame for one of the building systems were replaced, which resulted in a small decrease of the emissions. It is however, in a larger perspective, important to reduce the emissions as much as possible and there is still room to continue the improvement of concrete.
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Green intermodal freight transportation: bi-objective modelling and analysisDemir, Emrah, Hrusovsky, Martin, Jammernegg, Werner, Van Woensel, Tom January 2019 (has links) (PDF)
Efficient planning of freight transportation requires a comprehensive look at wide range of factors in the operation and man-
agement of any transportation mode to achieve safe, fast, and environmentally suitable movement of goods. In this regard,
a combination of transportation modes offers flexible and environmentally friendly alternatives to transport high volumes
of goods over long distances. In order to reflect the advantages of each transportation mode, it is the challenge to develop
models and algorithms in Transport Management System software packages. This paper discusses the principles of green
logistics required in designing such models and algorithms which truly represent multiple modes and their characteristics.
Thus, this research provides a unique practical contribution to green logistics literature by advancing our understanding of
the multi-objective planning in intermodal freight transportation. Analysis based on a case study from hinterland intermodal
transportation in Europe is therefore intended to make contributions to the literature about the potential benefits from com
bining economic and environmental criteria in transportation planning. An insight derived from the experiments conducted
shows that there is no need to greatly compromise on transportation costs in order to achieve a significant reduction in
carbon-related emissions.
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Análise econômica e ambiental de sistemas de geração alternativa para suprimento energético de carros elétricos / Economic and environmental analysis of alternative generation systems for energy suppression of electric carsCastro, Thais Santos [UNESP] 02 March 2018 (has links)
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Previous issue date: 2018-03-02 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A preocupação com o meio ambiente e com a qualidade do ar tem sido o foco de vários trabalhos nos meios acadêmico e governamental, sabendo-se que e um dos grandes fatores dessa degradação é o meio de transporte. O poder aquisitivo do cidadão brasileiro unido à facilidade da compra de novos carros está crescendo a cada ano, com isso o número de veículos por habitante também tem aumentado; nesse sentido, é essencial que novas tecnologias mais eficientes e com melhor rendimento sejam estudadas e analisadas. Partindo deste conceito, nota-se que os carros elétricos são uma alternativa inteligente para diminuir a degradação provocada pelos combustíveis fósseis. A produção de energia elétrica por meio de fontes renováveis tais como fotovoltaica, biogás, etc., aliada ao baixo custo de manutenção e à longa vida útil, está se tornando uma alternativa atrativa. Neste trabalho são aplicadas metodologias para dimensionamento e análise do custo da geração de energia elétrica através de fontes renováveis: fotovoltaicas e biogás. Considera-se também o custo operacional do carro elétrico sendo abastecido com a eletricidade fornecida por essas fontes e pela energia da concessionária rede, comparado ao custo operacional de um carro de motor de combustão interna. Também é determinado o CO2eq emitido pela utilização da usina fotovoltaica, usina a biogás, energia da rede e pela gasolina e etanol utilizado no carro de MCI. Foi ainda calculado o passivo ambiental associado a cada tipo de tecnologia de geração de eletricidade renovável. Conclui-se que o retorno de investimento para a energia gerada pelo biogás é menor do que para a energia fotovoltaica, porém as duas opções apresentam viabilidade econômica, considerando ainda que a agressão ao meio ambiente é baixa para ambas as tecnologias. Tais fatores propiciam uma alternativa de estudo eficaz afim de customizar o sistema e diminuir o custo de geração de eletricidade e gerar alternativas de redução de CO2eq. / The concern about the environment and the quality of the air has been the focus of several studies in both academic and government fields, showing that one of the main responsible ones for the degradation of the environment is transportation. The acquisition power of Brazilian people coupled with the ease of buying new vehicles is growing every year; as a result, the rate of vehicles per inhabitant has also increased; in this sense, it is of essence that new and more efficient technologies be studied and analyzed. Starting from this concept, electric vehicles are a smart alternative to reduce the degradation caused by fossil fuels. The production of electricity from renewable sources such as photovoltaic, biogas, etc., combined with the fact that those systems have low maintenance costs and long service life is becoming an attractive alternative. In this study, methodologies are applied to calculate and analyze the costs of electricity generation by renewable sources: solar and biomass energy. It is also considered the operating cost of the electric car being fed with the electricity provided by these sources and by grid energy, compared to the operating cost of an internal combustion engine car. The CO2eq emitted by the use of the photovoltaic plant, the biogas plant, the grid energy and the gasoline and ethanol used in the ICE car is also determined. It was also calculated the environmental liabilities associated with each type of renewable electricity generation technology. As a conclusion, this study shows that the return of investment considering the energy generated by biogas systems is lower than the one required to generate photovoltaic energy, but both options present good return of investment, considering also the low level of aggression to the environment. These factors provide an effective option for a study aiming to customize the system and to reduce the electricity generation costs, decreasing CO2 equivalent levels
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Emissão de gases de efeito estufa e pegada de carbono na produção de pepino, tomate e alface em dois sistemas de cultivo /Pereira, Breno de Jesus January 2020 (has links)
Orientador: Arthur Bernardes Cecílio Filho / Resumo: O cultivo consorciado de hortaliças é considerado uma alternativa ao sistema convencional, pois caracteriza-se pela maior eficiência do uso da terra e de insumos. Por esta razão, acredita-se ser este um modelo de cultivo mais sustentável e de baixa emissão de gases de efeito estufa (GEE). Assim, objetivou-se estimar a emissão direta e indireta de GEE e a pegada de carbono por quilograma de hortaliça produzida nos sistemas de consórcio e monocultivo, em ambiente protegido. Para isso, baseado em trabalhos publicados sobre a eficiência agronômica destes sistemas, foram comparados consórcios de pepino-alface e de tomate-alface com monocultivos de pepino, tomate e alface. Duas unidades funcionais foram selecionadas para estimar o impacto de cada sistema, um quilograma de hortaliça produzido e um hectare de cultivo. O total de GEE emitido para cada sistema de cultivo foi convertido em CO2 equivalente (CO2eq), utilizando a metodologia do IPCC e fatores específicos (Tier 2). As emissões totais de GEE nos dois consórcios (16.368 kg CO2eq ha-1 ) foram cerca de 35 % menores que o total emitido quando em monocultivos (25.273 kg CO2eq ha-1 ), sendo a infraestrutura e fertilizantes sintéticos as principais fontes contribuintes nos dois sistemas. A pegada de carbono para a produção de um quilograma de hortaliça em consórcio (0,105 kg CO2eq kg-1 ) é cerca de cinco vezes menor que em monocultivo (0,516 kg CO2eq kg-1 ), e essa diferença se deve, também, às diferentes produtividades das cultura... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Vegetables intercropping cultivation is considered an alternative to the conventional system, as it is characterized by greater efficiency of land use and inputs. For this reason, it is believed to be a more sustainable and low greenhouse gas (GHG) emission cultivation model. Thus, the aim of this study was estimate direct and indirect GHG emission and the carbon footprint per kilogram of vegetables produced in intercropping and monoculture systems, in protected environment. Based on published works about agronomic efficiency of these systems, it was compared intercropping of cucumber-lettuce and tomato-lettuce with cucumber, tomato and lettuce monoculture. Two functional units were selected to estimate the impact of each system, one kilogram of vegetables produced and one hectare of cultivation. Total GHG emissions for each cropping system were converted in CO2 equivalent (CO2eq) using the IPCC methodology and specific factors (Tier 2). GHG emissions in both intercropping cultivation (16,368 kg CO2eq ha-1 ) were about 35% lower than the total emitted in monocultures (25,273 kg CO2eq ha-1 ). The main contributing GHG emission sources were infrastructure and synthetic fertilizers in both systems. Carbon footprint for production of one kilogram vegetables in intercropping (0.105 kg CO2eq kg-1 ) is about five times lower than in monoculture (0.516 kg CO2eq kg-1 ), and this difference is also due to the different crop productivity. The results confirm that intercropping cultivati... (Complete abstract click electronic access below) / Mestre
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Klimatkalkyl för flerbostadshus : Klimatbelastande poster i tidigt skede / Carbon footprint calculations for apartment buildingsNorman, Mathilda January 2019 (has links)
Klimatförändringarna är ett faktum. Den förstärkta växthuseffekten hotar att förinta både djur och naturliv om inte åtgärder vidtas. I Parisavtalet fastslås att det centrala målet är att hålla den globala uppvärmningen under två grader men med en strävan att inte gå över en och en halv grad. För att göra det möjligt krävs åtgärder och metoder som säkerställer en minskning av växthusgaser i atmosfären. Klimatkalkyl är ett verktyg som kan användas för att se vad ett projekt har för totalt utsläpp, samt se till materialens enskilda utsläpp. Syftet med denna studie är att upprätta en klimatkalkyl för ett flerbostadshus i Borlänge kommun. Att utifrån klimatkalkylen identifiera projektets totala utsläpp för att sedan jämföra dom två högst belastande materialen med potentiella material. Jämförelse görs i produktionsskedet (A1-A3). Resultatet visar att betongen stod för 38 % och armering för 11 % av det totala utsläppet av växthusgaser. Tillsammans utgör dessa material 49 % av det totala utsläppet. Betongen och armeringen jämfördes med Skanskas gröna betong och armering från Celsa Steel Service. Med ett byte av traditionell betong och armering till klimatsmartare material kan en sänkning på 41 % göras för utsläppen ifrån tillverkningen av betongen och armeringen tillsammans. Genom att byta ut lite av cementen till slagg, i betongen, kan en halvering för utsläpp av växthusgaser göras. Trots en markant ökning av hållfasthetsklass på betongen kunde det fastställas att den grönare betongen fortfarande haft en lägre klimatpåverkan än den ursprungliga betongen. Tillsammans med armering, som tillverkas av skrot och förnybar energi, är det möjligt att bidra till en sänkning av CO2-utsläppen för Bygg- och fastighetssektorn. Verktyget ECO2 som används för att upprätta klimatkalkylen är ett bra redskap för att i tidigt skede identifiera material med hög klimatbelastning för att möjliggöra ett byte av material. Arbetet har bidragit till att skapa en större förståelse för vad materialhantering och tillverkning av material har för avgörande faktorer för ett materials utsläpp utav växthusgaser. Slutsatsen av arbetet visar på vikten av att i tidigt skede bli medveten om vikten av materialval för att minska utsläppen. Genom byte av en eller två material är det möjligt att sänka utsläppen avsevärt vilket kan bidra till att nå målen om klimatneutralitet till år 2045. / Climate change is a fact. The amplified greenhouse effect threatens to destroy both plant- and animal life if no actions are made. One of the main matters in the Paris agreement is to keep the global warming under 2 degree Celsius but with the ambition to keep it under 1, 5 degree Celsius. To make this possible requires actions and methods to ensure a reductions of greenhouse gases in the atmosphere. Carbon footprint calculation is a tool that can be used to see the total emissions from a project, but also to see specific materials emissions. The intention with this thesis is to establish a carbon footprint calculation for a apartment building in Borlänge county. By using the carbon footprint calculations identify the projects total emissions and compare the top two emission materials with other materials. The comparison is made in the product stage (A1-A3). The results shows that 38 % of the total emissions comes from concreate and 11% from reinforcing bars. Together they make up 49 % of the total emissions from the project. The concreate was compared with Skanskas Green concreate and the reinforcing bars was compared with bars from Celsa Steel Service. To exchange both concreate and reinforcing bars to more climate friendly materials would mean a lowering of the emissions with 1% in the product stage. By exchange some of the cement to dross, in the concreate, the emissions of greenhouse gases from it can be cut in half. Even after a significant increase of the concreates solidity it could be established that the green concreate still had less emissions of greenhouse gases than the original concreate. Together with the reinforcing bars, which are made of junk and renewably energy, it is possible to contribute to a lowering of greenhouse gases by the constructionand real estate sector. The instrument ECO2, which was used to establish the carbon footprint calculation, is a good tool to identify materials with high emissions in the early stage. This grant a possibility to locate and change these materials with high emissions of greenhouse gases. This thesis has contributed to creating a understanding for what crucial factors the handling of materials and the manufacturing of materials to lower the emissions of greenhouse gases. The conclusion of the thesis proves the importance of being aware in the early stage of which materials have the most emissions and if they can be replaced by something better. By replacing one or two materials it is possible to lower the emissions of greenhouse gases considerably which had contributed in the quest to reach climate neutrality by 2045.
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Resíduos de abatedouro na dinâmica da matéria orgânica, retenção de água no solo, produtividade das culturas e eficiência em sistema de plantio diretoRomaniw, Jucimare 21 June 2018 (has links)
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Previous issue date: 2018-06-21 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / O descarte inadequado de resíduos orgânicos de abatedouros de aves e suínos pode promover a poluição ambiental. Seu uso aliado ou não a adubação mineral nas rotações de culturas no sistema de plantio direto na região dos Campos Gerais seria uma alternativa viável para o aproveitamento desse resíduo. No entanto, visando otimizar a produtividade agrícola e a qualidade ambiental, devem ser estudadas dosagens adequadas para uso, combinando perda e aumento de nutrientes, matéria orgânica e produtividade das culturas. Além disso, é de extrema importância monitorar a qualidade do solo na determinação do risco de qualidade ambiental proporcionado pelo uso de altas doses de resíduos orgânicos dispostos no solo. Assim, o experimento foi conduzido utilizando diferentes níveis de adubação de resíduos orgânicos industriais (ROI) (0, 25, 50, 75, 100% de resíduos orgânicos) combinados com adubação mineral (FMI) (0, 25, 50, 75, 100%) nas seguintes proporções 0%; 100% ROI; 100% FMI; 75% FMI + 25% ROI; 50% ROI + 50% FMI . O experimento teve início em 2009 e foi acopanhado até 2015 sob plantio direto e rotação de culturas (feijão / trigo / soja / aveia / milho / trigo). Amostras de solo foram coletadas após 5 safras para avaliações de carbono (C) e suas frações. Experimentos de laboratório para avaliar a qualidade do solo foram conduzidos para avaliar o equivalente na emissão de C-CO2, percolação e mineralização de NO3- em solo não revolvido e revolvido sob doses crescentes de ROI (0, 0,5, 1, 2, 4 e 8 Mg ha-1) em laboratório. Também foram avaliados os pools de carbono orgânico do solo (COS) compostos por C total, C orgânico permanganato oxidável e C orgânico extraível por água quente, e atributos físicos do solo através da densidade do solo, porosidade total, macroporos e microporos porosidade, e retenção de água. Os resultados indicaram que o uso de ROI e FMI + ROI têm um bom potencial no sequestro de C no solo na mitigação de CO2 sem qualquer custo adicional. Ao contrário, aumentou a produção e retorno líquido da maioria das culturas. O uso do ROI 100 reduziu a densidade do solo, aumentou a porosidade total e microporos e melhorou a estrutura do solo, resultando em melhor retenção de água e que o teor de N-NO3- tem seu potencial de disponibilidade para as plantas após 40 dias da aplicação do ROI , sendo assim indicado a aplicação do resíduo antecedendo o plantio da cultura,
aproveitando assim o potencial de liberação. Assim conclui-se que o ROI proporciona aumentos no C do solo levando ao aumento da produtividade das culturas, da qualidade química e física do solo. / Inadequate disposal of organic solids from poultry and pig slaughterhouses can promote environmental pollution. Your use ally or non the mineral fertilization in rotations of wood in no-tillage system in the Campos region. However, in order to optimize agricultural productivity and environmental quality, the administration of the use variables should be studied, combining loss and increase of nutrients, organic matter and crop productivity. In addition, the quality of the soil to the extent of the environmental quality risk provided by the use of high doses of organic waste is not of the utmost importance. Thus, it was resistant to maintaining levels of industrial organic fertilization (IOW) (0, 25, 50, 75, 100% organic waste) combined with mineral fertilization (MF) (0, 25, 50, 75, 100%). The experiment started in 2009 and was harvested until 2015 under no-tillage and crop speed (beans / wheat / soybean / bird / corn / wheat). Soil samples were collected after 5 harvests for carbon (C) evaluations and their fractions. Soil Quality Laboratory Analyzers were conducted for the use of C-CO2, percolation in unroot and upturned soil and N-NO3- mineralization under increasing doses of ROI (0, 0.5, 1, 2, 4 an 8 Mg ha-1). The sets of CO by C, Corning permanganate oxable and C, seismic by hot water, and soil physical components were highlighted by soil density, total porosity, macro and micro porosity, and water retention. The results indicated that the use of IOW and MF + IOW had a good potential in soil C sequestration in CO2-C mitigation at any additional cost. On the contrary, it increased the yield and liquid of most crops. The use of IOW 100 reduced soil density, increased its total and micro efficiency and improved soil structure resulting in higher water retention and that N-NO3- content has its potential availability for applications after 40 days of application of the IOW , thus being designated an application of pre-planting of crop, thus taking advantage of the potential of release. Thus, it is concluded that IOW offers increases in soil performance and increases crop productivity, soil chemistry, soil physical and biological.
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A vertical greenhouse poweredby waste heat : Making use of industrial low temperature waste heat from the company Cytiva from an environmental aspectLundström, Johanna, Ezra, Johanna, Beck-Norén, Filippa, Heino, Emelie January 2022 (has links)
The industry sector accounts for a vast amount of the world’s total energy use, as much as 37% during 2018. Using energy in a sustainable way is necessary from both an environmental and an economical perspective, and it is therefore relevant to take measurements that result in a more efficient use of energy. One way for industries to become more energy efficient is to recover the waste heat, which is energy that otherwise would go to waste. This report aims to find a method to recover and reuse the low temperature waste heat available at the life science company Cytiva’s production site in Uppsala, Sweden. The proposed solution will be to use the waste heat for heating a vertical greenhouse. The study will examine whether this is feasible, and also how installing photovoltaics affects the energy use. Furthermore, the environmental impact of operating the greenhouse with waste heat is also investigated by calculating the CO2 equivalent. The low temperature waste heat that Cytiva provides relevant for this study is 6683 kW, which will be used to heat up the greenhouse. Simulations in the software IDA ICE will be used to construct and simulate a model of the vertical greenhouse. Results from the simulations show that the chosen size, 25 x 50 x 35.5 meters, gives a good approximation according to the wanted temperature range, 18.3-32.2°C. Furthermore, the results imply that the total energy use, 790 652 kWh, and average power, 90.26 kW is less than the available waste heat and there is a large amount that still is unused. The CO2 equivalent is calculated to be 29 317 kg. A sensitivity analysis is made to evaluate the window-to-wall ratio as well as the size of the entire greenhouse. It showed that both parameters are critical and makes a big difference in the simulations.
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Hållbarhetsutvärdering - LCSA Analys : av trucksystem inom intern materialhantering / Sustainability – LCSA Analys : of forklift systems within internal material handlingDahlberg, Erik, Fohlén, Weronica January 2018 (has links)
Allt fler organisationer väljer att jobba med hållbar utveckling, på grund av att det kan ses som en konkurrenskraft. Att arbeta med hållbar utveckling kan innefatta att utföra hållbarhetsutvärderingar, vilket kan göras genom metoden LCSA analys. Syftet med det här arbetet är att utvärdera och analysera ett producerande företags nuvarande klimatpåverkan sett till koldioxidekvivalentutsläpp från intern materialhantering som sker med dieseltruckar. Vidare syftar även arbetet till att visa hur en hållbarhetsutvärdering kan utföras för att påvisa ekologisk, ekonomisk samt social påverkan. I arbetet utförs en hållbarhetsutvärdering av trucksystem, för att identifiera det teoretiskt bästa alternativet, i jämförelse med ett fallföretags nuläge. Den metod som används för hållbarhetsutvärderingen är LCSA analys. Utöver resultatet från hållbarhetsutvärderingen tas även hänsyn till gränssnittet mellan teoretiskt och praktiskt bästa trucksystemalternativ. Fallföretaget Volvo GTO i Skövde, har i dagsläget 18 dieseldrivna motviktstruckar, vilka har olika kapacitet och varierande arbetsuppgifter. Det nuvarande drivmedlet för samtliga truckar är Diesel Mk1. Fallföretagets flöden i dagsläget ställer generellt höga krav på truckarnas tekniska kapacitet gällande exempelvis åkhastighet, körning i uppförslutning, dragkraft samt lyft- och sänkhastighet. De 18 dieseltruckarna bidrog under år 2017 med ett klimatpåverkande utsläpp om cirka 237 ton koldioxidekvivalenter, sett till hela livscykeln för Diesel Mk1 samt truckflottans totala drifttider. Gällande hållbarhetsutvärderingen LCSA analys, utförs den på trucksystem drivna av Diesel Mk1, HVO-Diesel, blybatterier samt litiumjonbatterier inom kapaciteterna 3,5, 5 och 8 ton. Analysen tar hänsyn till de tre pelarna inom hållbar utveckling. Vidare tas hänsyn till trucksystemens tekniska specifikationer, vilket jämförs mot den nuvarande dieseltruckflottan. Generellt kan en lägre teknisk prestanda ses hos de eldrivna trucksystemen, vilket kan påverka möjligheten att implementera de hos fallföretaget. Teoretiskt lägst ekologisk och social påverkan kan ses hos de litiumjonbatteridrivna trucksystemen, lägst påverkan inom den ekonomiska pelaren har blybatteridrift. Ställt mot fallföretagets nuvarande flöden och behov, rekommenderar författarna HVO-Dieseldrivna trucksystem, då de har samma tekniska kapacitet samt lägre ekologisk och social påverkan. Avgränsningar har gjorts för analyserna i rapporten, gällande processgränser och påverkande faktorer. För framtida hållbarhetsutvärderingar rekommenderar författarna att större processgränser och fler påverkande faktorer tas hänsyn till, för att identifiera samtlig påverkan inom pelarna. I rapporten återfinns exempel på påverkan utanför valda processgränser, såsom utsläpp som påverkar över tid och exploatering. Under arbetets gång har informationsgap uppmärksammats inom olika områden. När det gäller forskning kring hållbarhetsutvärderingar saknas beprövade metoder. Därför efterfrågas enklare analysmetoder inom hållbar utveckling. Gap i forskning angående truckteori är något som också uppmärksammats. / The amount of organizations that choose to work with sustainability is increasing due to the potential competitiveness it causes. Working with sustainability may include sustainability evaluations, which can be done through the LCSA analysis method. The purpose of this report is to evaluate and analyze a manufacturing company's current climate impact due to carbon dioxide equivalent emissions from diesel-powered forklifts within internal material handling. Further, the report aims to illustrate how a sustainability evaluation can be conducted to identify ecological, economic and social impact. In the report, a sustainability evaluation of forklift systems is performed to identify the theoretically best alternative, compared to a case company's current situation. The method used for the sustainability evaluation is LCSA analysis. In addition to the results of the sustainability evaluation, the interface between theoretically and practically best forklift system alternatives is considered. The case company Volvo GTO in Skövde, currently have 18 diesel-powered forklifts, which have different capacities and functions. The current fuel for all forklifts is Diesel Mk1. The flows today generally set high demands on the forklifts technical capacity, for example on, travel speed, climbing ability, traction force and lifting and lowering speed. In the year 2017, the 18 diesel-powered forklifts contributed with a climate impact of approximately 237 tonnes of carbon dioxide equivalents, considering the entire life cycle of Diesel Mk1 and the forklift fleets total run time. Regarding the sustainability evaluation LCSA analysis, it is performed on forklift systems powered by Diesel Mk1, HVO-Diesel, lead acid batteries and lithium-ion batteries within the capacities 3.5, 5 and 8-tonne. The analysis considers the three pillars of sustainability. Further, the technical specifications of the forklift systems are considered and compared with the current diesel-powered fleet. Generally, a lower technical capacity can be seen in the electric forklift systems, which may affect the ability to implement those at the case company. Theoretically lowest ecological and social impact can be seen within the lithium-ion battery-powered forklift systems, the lowest impact on the economic pillar is seen in the lead acid battery systems. Based on the case company's current flows and demands, the authors recommend HVO-Diesel-powered forklift systems, as they have the same technical capabilities as well as lower ecological and social impacts. Limitations has been set for the reports analyzes, regarding process boundaries and impact indicators. For future sustainability evaluations, the authors recommend that wider process boundaries and more impact indicators are applied to identify the total impact within the pillars of sustainability. The report comprehends examples of impact beyond selected process boundaries, such as emissions affecting over time or exploitation. During the progress of this report, information gaps have been discovered in different areas. Regarding research of sustainability evaluations, proven methods are lacking. Therefore, established methods for evaluation are desired. A gap in research of forklift theory has also been noted.
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