This report is about the experiments with mixing of the separated water and the vacuum pump seal water at Hellisheiði power plant. This is done to prevent silica scaling and clogging in pipes and reinjection wells as well as eliminating vacuum pump seal water from the plant. The experiments were done in four stages: the first stage comprised of tests with different flows of separated water at 70°C, the second stage was carried out by mixing the separated water at 70°C and the seal water with different amounts of the seal water, the third and the fourth stages were like the first and second but with the separated water at 120°C. The results show that this method is good if the mixture is around 50/50 separated water and seal water, to control the silica scaling in the separated water and to be able to reinject the seal water with the separated water. This does not eliminate the silica scaling in all of the separated water because the amount of separated water is much more than the amount of seal water that comes from the plant. .

This study analyses the economic consequences due to ethanol production in Eastern Sweden. The analyses consider the cooperative and the farmers as one vertically integrated company. The area that found the market in this study is illustrated in figure 1. The analyses assume that all members act jointly with the objective of maximizing joint profits at the farm level as well as at the cooperative firm. A mathematical model is created to calculate the optimal use of arable land.

Syftet med denna uppsats är att beskriva och jämföra hur ledningen i tre lantbrukskooperativ använder sig av verksamhetsstyrning, samt att analysera lantbrukskooperativens användande av verksamhetsstyrning utifrån modern verksamhetsstyrningsteori. Fallstudier har gjorts och datainsamlingen har skett genom intervjuer. En avgränsning har gjorts till att enbart behandla tre mejerier med olika storlek. Mejerier har valts eftersom mejeriernas standardiserade råvara underlättar en jämförelse företagen emellan. Undersökningsobjekten är Gefleortens, Milko och Arla Foods.

This master thesis was written for Arla Foods and the result of the thesisserves to gain Arla Foods in its work with chemical hazardous and to bringnew academic results. The thesis aims to create a common methodology forrisk analysis with the handling of chemicals.The theories displayed in this thesis focuses on different risk managementmethods in order to build up a framework out of which a risk management toolwas created. The main primary data source consists of interviews held withemployees within Arla Foods at different facilities.The risk management tool can be found in appendix K.Available recommendations for how to evaluate risks with chemicals can befound at appropriate government agencies. These recommendations aredrawn up to suite small and medium enterprises and therefore are to narrowto make a good foundation for analysing chemical risks at large companies.With the legislation and government demands in mind, a tool has beencreated to fit a large company?s needs when managing chemical risks.

In order to maintain a high safety level at a nuclear power plant it is important not only to measure the reliability of the components and systems of the plant, but also to investigate how the plant responds to human actions. One of the most hazardous situations in managing a power plant is fire occurring in critical areas. This study concerns the prospect of the local fire brigade to suppress a fire that has started in one of the most critical rooms for maintaining high reactor safety. The model created gives an indication on the possibilities of succeeding in suppressing a fire. In order to get a more reliable fire fighting the following advice are given:- Let the fire brigade go rounds in the plant together with the personnel, during which recommended fire suppressing methods are determined to avoid long preparation time in an actual situation.- Prepare rooms with two subsystems to make them partly with no voltage.- Give the fire brigade better feedback from actual events on nuclear power plants.- Education and training in suppressing fires in electrical equipment.The probabilistic safety assessment strives to be as realistic as possible.

This master thesis was written for Arla Foods and the result of the thesisserves to gain Arla Foods in its work with chemical hazardous and to bringnew academic results. The thesis aims to create a common methodology forrisk analysis with the handling of chemicals.The theories displayed in this thesis focuses on different risk managementmethods in order to build up a framework out of which a risk management toolwas created. The main primary data source consists of interviews held withemployees within Arla Foods at different facilities.The risk management tool can be found in appendix K.Available recommendations for how to evaluate risks with chemicals can befound at appropriate government agencies. These recommendations aredrawn up to suite small and medium enterprises and therefore are to narrowto make a good foundation for analysing chemical risks at large companies.With the legislation and government demands in mind, a tool has beencreated to fit a large company?s needs when managing chemical risks.

Detta examensarbete är utfört vid Linköpings Tekniska Högskola och Arla Foods i Linköping under vårterminen 2009.Arla Foods i Linköping invigdes år 1978 och går under benämningen specialproduktsmejeri. Ett specialproduktsmejeri arbetar i huvudsak med att förädla basprodukter genom att t.ex. smaksätta creme fraiche, yoghurt och mjölk.Detta arbete inleddes med en omfattande datainsamling och intervjuer med anställda på mejeriet vilket bidrog till att skapa en bild av nuläget på mejeriet som i rapporten kunde beskrivas och analyseras. Syftet med detta examensarbete var att undersöka om dagens sätt att styra materialflödet av emballage kunde förbättras samt att undersöka vilka möjligheter en ny lagerlokal skulle ge. Analysen visade att det fanns rum för förbättring vad gällde bl.a.

Meat and fish was the most important food for the Sami people in northern Scandinavia until the beginning of the 20th century. It is not so well known that the Sami people also used a lot of wild plants as food and medicine although that kind of food was relatively common among them until the end of the 19th century. The purpose of this master thesis has been to describe which plants the Sami people used in general and also which plants were the most commonly used, and when and how these plants were harvested. I also wanted to measure the quantities of Angelica archangelica and Rumex acestosa within traditional harvest sites. Furthermore I wanted to find out if the plant use differed among Sami groups geographically.

This study deals with the technical and economic feasibility of replacing the nuclear power plant reactor Ringhals 3 with a biofuel power plant. A technical investigation has been executed to determine which of the systems and components that could be reused and which ones would need to be replaced. The investment costs of the reconstruction have also been estimated. The cost of the electricity production has been calculated as well as the emissions of the new biofuel power plant. Based on the established rate of return, the lowest average spot price of electricity that makes the investment profitable has been calculated.

This study was carried out as a commission from Holmen Skog, district ?Egen skog? in Norrköping. During October 2006 several stands were inventoried by aerial photos from helicopter. The stands were those for which the next action proposed was plant inventory or plant check. The photos were interpreted and the number of stems was calculated.

Vårt syfte med denna uppsats är att ge en ökad förståelse för hur hälsobudskapet kankommuniceras på förpackningar och i marknadsföring för att underlätta att budskapet når ut till konsumenterna. Vi har använt oss av en deduktiv ansats för att ta fram antagande om hur functional foodsföretag effektivt ska kommunicera sitt hälsobudskap. Dessa antaganden har vi sedantestat med kvalitativa empiriska undersökningar. Våra intervjuer presenteras i ett empirikapitel som sedan analyseras. I teoriavsnittet har vi använt oss av flera modeller och teorier varav två varit av stor vikt.

With background in the rapidly growing need to find solutions for sustainable energy production and the increasing interest for wind power, this report was written. With take-off point from the wind power plant Big Glenn, which has been built in the harbour of Gothenburg, a model of the adjacent power grid has been created in Simulink/SimPowerSystems. Parameters for the power grid and its components has been provided by Göteborg Energi Nät, that has also been the supplier of measurement data of produced power, the power need from loads in the vicinity, voltage levels, current values and also the variation of power factor at the wind power plant.The SimPowerSystems model has been used to perform simulations of power flow in the grid. These simulated values have then been compared to the measured values to verify the functionality of the model. Further, the model has been used to perform simulations of a grid fault, which causes a voltage drop.

The Rya power plant in Borås produces district heating, district cooling and electricity. The plant is owned by Borås Energi och Miljö AB and is run by Dalkia Facility Management AB.In order to get the best heat exchange from the district hot water a pair of twin pumps and a turbine circuit pump are used as return pumps. Turbine circuit pumps are used to increase the pressure through the heat exchangers at the power plant. The pumps are in use when the flow is over 2 000 m3 h-1 and during the summer when re-cooling is used to improve the effectivens of the heat boilers.Since the pumps, that are parallel connected, rotating at a fixed rate per minute, the pressure is regulated with regulating valves. This report shows that during the 4,300 hours that the pumps where in use, energy corresponding to 590 MWh was wasted.

With background in the rapidly growing need to find solutions for sustainable energy production and the increasing interest for wind power, this report was written. With take-off point from the wind power plant Big Glenn, which has been built in the harbour of Gothenburg, a model of the adjacent power grid has been created in Simulink/SimPowerSystems. Parameters for the power grid and its components has been provided by Göteborg Energi Nät, that has also been the supplier of measurement data of produced power, the power need from loads in the vicinity, voltage levels, current values and also the variation of power factor at the wind power plant.The SimPowerSystems model has been used to perform simulations of power flow in the grid. These simulated values have then been compared to the measured values to verify the functionality of the model. Further, the model has been used to perform simulations of a grid fault, which causes a voltage drop.

This study has investigated how urban vegetation can be used in a multifunctional way to support ecosystem services in urban environments. Nacka municipality is in the start-up phase of building what is to become Nacka city. This provides a unique possibility to study and analyse what role the vegetation play in making the city a healthy living environment and how it needs to be adapted in order to be resilient against changing climate conditions and how the effects of those changes can be regulated. The study further investigates how airborne pollution, caused by urbanization processes, can be regulated or reduced by vegetation or species selection. Methods used in this study were a combination of qualitative interviews and literature studies, seeking to answer the questions: Which specific ecosystem functions are needed in the urban environment and which aspects will influence the ecosystems ability to deliver the functions in demand? And which plant species have the right mechanisms needed to deliver those functions? These questions have been studied and analysed in a local based context where the local conditions ands site specific needs of Nacka define criteria for plant selection.