Future emission legislation puts great emphasis on increasing the efficiency of the engine, thereby reducing fuel consumption. The tribological contact between cylinder liner and piston ring is where an great amount of energy is lost due to friction, and by reducing these losses an reduction in fuel consumption can be achieved.The aim of this thesis was to evaluate the tested piston ring coatings against a plasma sprayed cylinder liner and rank these combinations of materials for friction and wear resistance. The coatings that were tested was Cr + Al2O3, (Al,Cr)N, two types of CrN and WC / C.The experimental tests were performed with a so-called pin-plate, where used oil with addition of an acidic mixture of sulfuric and nitric acid to mimic the acidic condensate formed when exhausts recirculate, were added with a continuous flow. The results were then analyzed by weighing, studies by optical microscopy and scanning electron microscopy (SEM) and profile measurements.The results from each material combination were that the plasma coated cylinder liner wears too aggressively in order to yield a ranking of the piston ring coatings based on the parameters of friction and wear resistance. It is therefore proposed that an alternative coating on the cylinder liner should be developed, lacking the large abrasive wear on piston rings and that can withstand the corrosive environment resulting in engines equipped with EGR.

The Swedish stock-market gives investors an opportunity to benefit from the global growth while financing companies invests and contributes to a socio-economic development. Parallel to the ownership of the funds also follows a responsibility as companies in the funds affect society and the environment. The growth of savings in funds, combined with an increased focus on sustainability has developed SRI (socially responsible investment). Therefore it is interesting to examine whether responsibility is an exception, which only concerns SRI-funds or a general principle, which includes the whole Swedish stock-market.The results of the survey makes it clear that all the Swedish major banks actively works to integrate sustainability within the respective bank's business to achieve a more sustainable financial system. Thus concludes the investigation that responsible investments are a general principle on the Swedish mutual stock-market.How responsibility is integrated in fund management differ between the banks.

Companies must constantly adapt to new concepts emerging in society. Socialresponsibility and sustainable development are modern concepts of today and offer avariety of activities to choose from. Therefore companies ask themselves: what areour goals and how do we reach them?The purpose of this study is to examine the possibility of creating a simplifiedmodel,targeted towards management for prioritization and decisions on variousinvestmentspromoting the environment. The research focuses on companies from themanufacturing industries.

In Uppsala, Sweden, Vattenfall has a combined heat and power plant. On the premises there is an engineering workshop with old fluorescent and mercury lamps that need to be replaced. This provides a great opportunity to save energy and money by installing more efficient lighting. The main purpose of this study was to present two functional and energy efficient lighting systems including control system. The lighting systems were designed by investigating the working environment, measuring illuminance and by simulations in the software DIALux.

Purpose: The purpose of this paper is to study the companies approach to sustainability and to examine the relationship between the report content and the sustainability efforts businesses are making in practice.Method: The study has a qualitative perspective with semi-structured interviews and content analysis as method to collect data. Three companies were interviewed; Tekniska Verken AB, Apoteket AB and Max hamburgerrestauranger AB. The content analysis was used when collecting data from the three companies? sustainability reports.Frame of reference: Legitimacy theory, Stakeholder theory, Institutional theory, the Pyramid of Corporate Social Responsibility.Results: The result showed that all companies are prepared to work for sustainable development and that they view sustainability as an integrated part of their work. The sustainability report is the basis for sustainability reporting, which is a way for companies to demonstrate to their stakeholders what they stand for and what they implement in practice.

Climate and environmental issues is now high on the agenda. We live in a generation that must try to solve some major environmental problems. Buildings and habitations account for approximately 40 % of Sweden's total energy today. To reduce this figure, as needed, more research in the field of energy efficiency is required.This thesis concerns the heating of buildings. The load on district heating is heavy during certain times of the day.

VET HUT!Om möjligheter och begränsningar med ämnesövergripande tematisk undervisning för hållbar utvecklingEducation for Sustainable DevelopmentPossibilities and limitations with thematic interdisciplinary education for Sustainable Development.Antal sidor: 39Att gå från abstrakta ord till konkret handling, när det gäller realiseringen av hållbar utveckling, är en högprioriterad uppgift i dagens och framtidens globala samhälle. En uppgift där skolan besitter en nyckelroll för att lägga grunden till de attityder de uppväxande och kommande generationerna kommer att tillämpa i sina vardagliga handlingar.I och med detta anser vi det av stor vikt att ifrågasätta utformandet av undervisningen i hållbar utveckling och vi har i denna studie undersökt lärarnas syn på villkor för ämnesövergripande temaundervisning i hållbar utveckling. Där vi mot bakgrund av ett av oss konstruerat exempel diskuterar möjligheter och svårigheter tillsammans med nio lärare.Konklusionen av studien visar att HUT bör ses som ett holistiskt etiskt förhållningssätt snarare än ett specifikt undervisningsämne, då det i slutänden är den gemensamma insatsen som ger förutsättningarna för förståelsen av samspelet mellan ekologiska, ekonomiska och sociala aspekter. För att åstadkomma detta är behovet stort för att i skolan praktisera den normativa undervisningsmetodiken, för att förse eleverna med kritiskt tänkande och förståelse att genom etiska och demokratiska handlingar påverkar det globala samhället i en hållbar riktning.Vi konstaterar att det finns ett stort engagemang och intresse för HUT-frågor samt att HUT redan finns tillstor del ute i praktiken. De villkor vi funnit för temaundervisning i hållbar utveckling är att det måste finns ett intresse, en organisation och struktur som möjliggör samarbete och utbyte mellan elever, mellan lärare och mellan elever och lärare.

ur society is today in a phase of development in environmental and sustainable thinking. Alarming reports show changes in climate caused by our load and exhaust of resources. The energy usage contributes to a big part of it, by its emission of carbon dioxide. The built environment uses around 40 % of the total energy consumption in Sweden and requests to strongly reduce it are presented from both EU and national level.This thesis brings up the subject of green building with a focus on how we can create more energy efficient buildings in projects of new construction. Since the construction industry today often fails to pass on the knowledge between different projects, as a return of experiences, the construction company Skanska suggested the topic for this thesis.

This project was a collaboration with Kajsa Bergström. The projected was to develop the French/English deck of cards. We replaced the knight, queen and king with the numbers 11, 12 and 13. We worked with separate aesthetics and solutions after making that common change. I worked on an idea on how to make the cards look slim, by adapting a handcrafted look, full of details.

The housing sector uses 40 % of the energy in Sweden and half of the electricity usage. Theuse of energy is the main reason to the increasing rate of carbon dioxide in the atmosphere.This is the main motive but also a wish of higher safety, that is a higher rate of selfsufficientenergy production in Sweden, we want to decrease the need of using fossil fuel. Now whenthe energy price rise, the interest in energy issues increase and more people discuss thepossibility of reducing the usage of fossil fuel. A change to renewable energy such as sun,wind and water is the only solution where we can get a sustainable development.One way to contribute to a better use of energy is to build in the principle of passive house.The house is being built with a thick and tight insulation. If you use a heat-exchanger withhigh degree of efficiency and a final heating battery on the ventilation system, the heat fromlamps, devices and the ones living in the house should be enough to fulfil the criteria ofliving.

In this report two Sustainability Life Cycle Assessments are carried out for two types of tiles for Riksbyggen, to contribute to a sustainable urban transition. Sustainability Life Cycle Assessment involves performing a life cycle assessment based on four principles based on scientific research and presented by the non- governmental, non-profit organization, The Natural Step. The principles concern raw materials, chemically produced substances, degeneration of nature and social conditions.Origin of products, manufacturing sites and manufacturing procedures were initially completely unknown and much of the work has consisted of finding the entire cycles, understand manufacturing processes of ceramic tiles and evaluating what materials and what type of energy sources that are required for the production. A socially sustainable perspective has been of high relevance alongside an ecologically sustainable perspective.The report begins with the basic underlying facts and the purposes of this investigation and that the reasons why Sustainability Life Cycle Assessments are carried out are to provide Riksbyggen and the own workers with documents presenting Riksbyggens ideas regarding sustainability and to hopefully get the ideas further down in the supply chain. The methods used to fulfill the investigation are presented and scientific facts about LCA and ceramic building materials are reviewed.

The environmental demands are increasing when it comes to product development. EcoDesign isabout minimizing the environmental impact of a product, considering the entire life cycle of it,without compromising other qualities like function or cost. In this master of science thesis amobile phone has been analysed with Ten Golden Rules in EcoDesign regarding production, useand End of Life. Also a functional and an environmental profile were made. The goal was tomake a new concept phone, based on the previous analysis, which communicates userfriendlinessand sustainable development.

Rapportens syfte är att arbeta fram förslag till en hållbar förnyelse av bostadsområdet Gulsparven i Trollhättan, på uppdrag av AB Eidar Trollhättans bostadsbolag. I dagsläget har området energirelaterade problem och är i behov av upprustning. För att komma fram till goda lösningar har litteratur- ochinformationsstudier, intervjuer med erfarna personer samt inventeringar av området gjorts. Förslagen åskådliggörs i form av ritningar samt 3D-vyer.Fyra förslag till förnyelse har tagits fram med olika grad av åtgärder, där två av dem kräver en omprövad detaljplan. Generella åtgärder, vilket gäller i samtliga förslag, är betydelsefulla lösningar för att växa mot rollen som ett hållbart bostadsområde.

The project was performed at SiemensIndustry Drive Technologies with theobjective to provide actual values forthe energy savings potential withinSiemens scope of practice.In Sweden the electrical drives standfor about 30 % of the total electricityconsumption and about 60 % of theelectricity consumption within theindustry. During the pre-study phaseelectrical drives with pump applicationswere identified as large energy users.Because of this a case study at one ofSiemens customers, Stora Enso Fors wasperformed. The system that was evaluatedduring the case study was a throttledsystem with a centrifugal pump forpumping pulp.The results yielded that a saving ofover 50 % could be achieved by replacingthe throttle valve with a variable speeddrive, a frequency converter. Thepayback period was two years and twomonths and the present value for thetotal life cycle cost of the variablespeed system was 662.566 SEK lower thanfor the throttled system. As aconsequence, Stora Enso Fors is advisedto invest in a frequency converter forregulation of the system.The general conclusion is that a focuson system efficiency is the mostimportant factor in energy efficiencyprojects and that the system regulationmethod has a large impact on the overallsystem losses and hence its efficiency.Energy efficiency potential forthrottled systems with centrifugal pumpsis large and significant economicalsavings can be made through investmentswith short payback time..

The use of energy is an important question in today´s society, and a substantial part of the energy that is used today is used in our homes. To lower this usage is vital, and there are regulations in place both on the national and the local level, that say that new apartment blocks must be built to consume less energy, which in the end will lower the impact on the climate.One way to make the housing sector more environmentally sustainable, is to produce energy issions that are bad for the environment, for example to build wind turbines close to or even on the buildings, so called urban wind power. The scope for this report is to see if urban wind power could be a sustainable alternative for the residential area that Svenska Bostäder plans to build in Albano in Stockholm.There are extensive scientific theories regarding wind and wind power, and a literature study is made to investigate past knowledge in the area. Efforts have been made to find earlier trials with urban wind power and, both scientific research and trials where urban wind power actually has been installed. The theory chapter deals both with the wind itself and how electricity can be generated from wind.