Thermia Värme AB is one of the market leading manufactures of heat pumps. In order tomaintain this position, the company wants to improve the vibration characteristics of theirproducts. The aim of this thesis is to develop product design changes that lead to a reductionof vibrations in the heat pump Thermia Diplomat 8.The main cause for vibrations in the system is flow pulsation and mechanical forces inducedby the scroll compressor. Vibration is transmitted through the compressor piping and receivedby the heat exchangers, from where it is further transmitted to the connection points for theradiator and heat source circuits.A number of design changes in order to improve the vibration characteristics have beenevaluated through calculations and practical experiments. The changes have included thecompressor and heat exchanger mountings, the compressor suction and discharge line pipingand also pulsation dampening.The results of the experiments show that the vibration levels in the connections for the heatingand brine circuits can be decreased strikingly through changes in suction and discharge linepiping.

This is a case study of the advertising campaign ?Guld till alla? (Gold to Everyone) embarked upon by Spendrups Bryggeri AB in a bid to promote Norrlands Guld, during the period 2004. The approach used by Spendrups will be compared with theories about communication planning, communication strategies, target group definition and how to create effective advertising. The main purpose of the comparison is to find which central elements that made the campaign successful. The method we have chosen to use is an explanative content analysis with influences from the dialogue analyse.?Guld till alla? was suppose to be an massive and coherent campaign which was to be integrated with large sports events, such as the Ice Hockey World Championship, UEFA European Championship and the Summer Olympic Games, that all took place the year 2004.

This essay is an analysis of the objects made of bronze found in an excavation Västergarn parish, Gotland, in 2010, conducted by the University of Gotland. The studied material presented in this essay comes from contexts inside, as well as nearby the foundation of a medieval building which purpose is still not certain. The first purpose of this study is to present the bronze-objects found inside and nearby the foundation of house 6, and to see if there are any datable objects. There is also a discussion whether there has been any bronze-crafting in the area. The second purpose is to make a contextual analysis to see if there are any differences between the material found outside and inside of the building, and what conclusions can be made regarding the function and use of the building.

Grönland är och har varit en mycket speciell plats. Nordborna kommer till Grönland cirka 985 e. Kr. De kommer dit som jordbrukare med boskap: kor, får och getter har de haft med sig från Island och Skandinavien. Nordborna upptäckte snart vilka rika naturresurser som fanns på vissa platser i Grönland såsom täljsten.

This Master?s Thesis aims to investigate and assess the methods used to decrease the discharge ofmetals, primarily copper, from the water purification plant at Assa Industries plating factory inEskilstuna.Literature studies of the purification methods precipitation, ion exchange, evaporation, reverseosmosis and electrolysis has been done to appraise the adequacy of the technique. Thesetechniques are commonly used for purification of industrial waste water.Assa has four plating lines: the Trumline, the big Zinkline, the new Zinkline and the Decorativeline. The new Zinkline is the most modern of the four lines and purification is done byrecirculation over an ion exchange unit. The demand for fresh water is thereby heavily reduced.The Trumline, the big Zinkline and the Decorative line all use older techniques.

I den ha?r studien implementeras en finita elementmetod fo?r att lo?sa optimala styrpro- blem i programvaran FEniCS. Den finita elementmetod som anva?nds a?r ha?mtad fra?n Karin Krafts doktorsavhandling Adaptive Finite Element Methods for Optimal Control Problems [2].Optimala styrproblem behandlar styrning av dynamiska system. Systemen beskrivs av en tillsta?ndsekvation och ma?let a?r att styra systemet mot ett visst tillsta?nd till en sa? la?g kostnad som mo?jligt.

In the fluidized bed furnace at Rönnskärsverken, Skelleftehamn, sulphur-containing ore concentrates are roasted in order to remove about 50% of the sulphur in the incoming ore concentrate. This occurs in order to reach the goal of a matte containing 55% of copper in the following smelting process. At the same time as the ore concentrate is partially roasted pollutions as arsenic, antimony and bismuth are expelled. Earlier made thermodynamic calculations of equilibrium suggested that calcium and magnesium form stable compounds with arsenic and thereby inhibit expellation of arsenic in the fluidized bed furnace, an element that is undesired. The purpose of this thesis work was to gain knowledge of the mechanisms behind the formation of these stable arsenic compounds.

Det har uppmärksammat att det fortfarande förekommer tenn och koppar från båtbottenfärg på fritidsbåtars skrov trots förbud av båtbottenfärger med tennföreningen TBT sedan 1989 och reglering av kopparbaserade färger sedan 1999.Syftet med denna kandidatuppsats är att ge en dagslägesrapport vad gäller förekomst av tenn och koppar på fritidsbåtars skrov.Under våren 2011 har tester på 336 fritidsbåtar i tre vattenområden gjorts med hjälp av en handhållen XRF (X-Ray Fluorescence, röntgenfluorescens) som genom avläsning av en yta visar halter av olika grundämnen. Testerna utfördes på vinterförvarade fritidsbåtar <12 m hos båtklubbar vid Mälaren, Storsjön och Härnösandskusten. Undersökningen visar att 73 % av båtarna i denna undersökning har halter av tenn och/eller koppar överstigande >2500 ppm, vilket är det för rapporten satta riktvärdet. Det innebär att de skulle kunna tas vidare till kemisk testning med till exempel gaskromatografi kopplad till masspektrometri (GC-MS) för att avgöra exakt vilken substans färgen innehåller. Resultatet visar också att användningen av tennfärger antingen fortfarande förekommer i liten skala eller att gamla tennfärger är så pass starka att de ger utslag genom övermålade färglager.

This paper discusses the world heritage of Falun and its influence on the marketing of Falun as a destination. The reason for this study is the fact that world heritage nominations can lead to an increased pressure on the destination and an increase in popularity for the place. A world heritage is something unique and odd that can be used in the marketing of the destination in the purpose of attracting tourists, company investments and so on. It has been vital for the study to interview people that work with marketing or have important rolls within the world heritage.With this background the study is focused on three major questions:What meaning does the world heritage have in the marketing of Falun?Is the world heritage important for Falun? If yes: For who and why?Which organisations/persons in Falun have the greatest influence on the marketing process?In order to answer or discuss this question there are discussions in the paper regarding the notions of place marketing as well as the importance of a well outlined marketing strategy as a basis for the formulation of a product portfolio and segmentation strategy as well as strategy for developing a strong profile on the market.The answers to the question are relative and can have a different view in the future.

X-ray fluorescence (XRF) detection of heavy metals is a cost- and time-effective method for investigation of polluted areas. Compared to laboratory analysis, XRF analysis is limited by high detection limits and uncertainties in some situations. Preparation of samples is known to affect the results of measurements.The purpose of this thesis is to bring a deeper understanding of how different factors affect the results of XRF-analysis. A large number of measurements have been made with the instruments Niton XLt 700 and Niton Xli 700. Results from measurements of lead, zinc and copper have been analysed.This study has shown that a greater moisture content will give a lower measured concentration for the same sample.

This Master thesis is about a postal- and telegraphic building in Eskilstuna, Sweden. The construction methods for the specific building and buildings in general from the same time are described. The purpose of the report is to describe the loads acting on the building and how it has been built and why it has been rebuilt during the years. After this, possibilities of reconstruction and adaptation for today?s demands can be evaluated.

AbstractThe research project Liberation, supported by the European Commission under the Environment and Sustainable Development Programme (Fifth RTD Framework Programme) aimed at developing a decision support system for ecological risk assessment of contaminated sites has proposed a tiered system including the triad method. This method integrates contaminant chemistry and bioavailability analyses with observed ecotoxicological effects in soil and groundwater. In this study the triad method was used to perform a risk characterization of a former surface treatment and metal industry, now used for the student union buildings of the Mälardalen University in Eskilstuna, Sweden. On the site, high concentrations of copper, zinc and nickel have been detected in the soil in a preliminary investigation of contaminant levels with XRF. For performing the risk assessment of the site according to the triad method, contaminant bioavailability, soil metal concentrations and soil toxicity were determined and an ecological assessment was carried out on four selected soil samples (one reference soil and three samples with low (B), medium (C) and high (D) contaminant levels). Contaminant bioavailability was measured through leaching (ISO TC 190/S7) and biouptake tests (DGT).

Ensåsengruvan is a mine situated within Ljusdals municipality in central Sweden. Themine was in use from 1984 to 1991 and has since been undergoing a remediation program. Mine tailings from sulfide rich ore is a potential environmental hazard due to its tendency to cause acid waters and heavy metal leakage. Lake Ensjön is situated one kilometer from the mine area. Due to the hydrological conditions it was not expected to receive inflowing water from the mining area.

Highly polluted urban storm water from e.g. highways can contain large amounts of heavy metals that may cause harm if they are discharged into recipients. To remove the heavy metals a possible low-cost method that does not require much maintenance, could be the use of reactive filters with filter materials consisting of industrial residues or other cheap mineral based materials. Dissolved metal ions are removed by reactive filters through the processes of ions binding to active sites on the surface of the filter materials, or by formation of insoluble precipitates.The ability of CaO-treated granulated blast-furnace slag, iron oxide coated sand, olivine and nepheline to remove seven heavy metals (Cr, Cd, Cu, Ni, Zn, Pb and Hg) from urban storm water was studied. Initially batch experiments were performed where the effect of pH, dissolved organic carbon (DOC) and dissolved ions on the adsorption efficiency was studied.

Welding is a common method for joining of metal or plastic construction parts. This report describes several different weld methods in general terms. The report focuses on the GMAW method, specifically MAG welding.A case study has also been performed for the company Wenmec. The task received from the company was to compare the mechanical properties of joints welded with the tube electrode called Nittetsu SM-3A and joints welded with the homogenous electrode called ESAB Aristorod 12.63. Both types of weld joint were welded with the MAG method with an Argon based shielding gas with 18% CO2.