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  • 1.
    Astner, Linda
    et al.
    Gävle Hamn AB, Gävle, Sweden.
    Carpenter, Angela
    University of Leeds, UK.
    Lozano, Rodrigo
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Industrial economics. University of Gävle, Center for Logistics and Innovative Production.
    Sammalisto, Kaisu
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Industrial economics. University of Gävle, Center for Logistics and Innovative Production.
    Utilizing waste to create new port land2018In: Port Technology, Vol. 77, no Spring, p. 118-119Article in journal (Other (popular science, discussion, etc.))
    Abstract [en]

    This paper presents the most recent port expansion and the major dredging and land creation project that has been undertaken in the Port of Gävle since 2007. This project has seen the deepening and widening of the fairway to accommodate larger vessels, as well as the construction of a new cargo terminal area due to open in late 2019. This land creation work has been undertaken using contaminated sediments dredged from deepening the shipping channel.

  • 2.
    Borg, Tommy
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Utvärdering av Wordpress: Design och Säkerhet2013Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Wordpress har använts länge för att bygga webbsidor, från början mest webbsidor där bloggen stod i centrum, men på senare tid även för att bygga mer avancerade webbsidor. Detta är skrivet i första hand för att få ett grepp om vilka fördelar och nackdelar det finns med Wordpress som webbplattform. Dokumentet ska kunna fungera som visst informationsunderlag vid utvecklandet av en Wordpresswebbsida. Dokumentet pekar på problematiken med att ge en kund viss begränsad möjlighet att lägga upp eget material, och ändå försöka säkerställa webbsidans grundkonstruktion och design. Det som gjordes är en Wordpresswebbsida och mall i Wordpress som ska kunna ligga till grund vid utvecklande av nya webbsidor i Wordpress, bägge med en mängd relevanta inlagda plugin, allt för att webbsidan ska ha vissa funktioner som video, bildgallerier, medlemshantering med mera, och en utvärdering om säkerheten i Wordpress.

  • 3.
    Bronegård, Martina
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Policy för markåtkomst: Granskning av Svensk Energis ”Policy - Markåtkomst”2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The management of land access for construction and maintenance of electric grids are handled differently by the electrical grid companies in Sweden. The branch organization Svensk Energi has created a policy for land access in order to create a unitary and equitable management that they recommend their members to use. The purpose of this study was to examine how the policy is used, to identify the areas of development and compile suggestions for improvement.

    Data for the study were collected through semi-structured interviews with experts in nine of the electrical grid companies that are members of Svensk Energi. The result shows that the application of the policy varies between the companies. According to the study the policy's positive features outnumbers its negative characteristics. The companies consider that the policy can be improved by more distinct guidelines in certain areas and more flexibility in other areas. The study presents and states the grounds for improvement proposals that Svensk Energi is recommended to implement to improve the policy.

  • 4.
    Gadaan, Kim
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Geospatial Sciences.
    Lund, Daniel
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Geospatial Sciences.
    Riktlinjer för trafiksäkerhetsåtgärder i småstäder: Exemplifierat i Söderfors tätort2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Trafiksäkerhet är den viktigaste utgångspunkten vid planering av vägar. Små tätorter saknar ofta underlag för storskaliga trafiksäkerhetslösningar och kräver istället mer lokala åtgärder i det befintliga vägnätet. Lokal trafikplanering är kommunernas ansvar som de genomför med hjälp av TRAST (2015) framtaget av bland annat Boverket och Trafikverket. TRAST (2015) inkluderar bland annat riktlinjer för ökad trafiksäkerhet, främst inom stadsmiljöer, men saknar konkreta riktlinjer för små tätorter. Examensarbetets syfte är att bli ett komplement till TRAST (2015) och tillhandahålla riktlinjer med rekommendationer för trafiksäkerhet i små tätorter (1000-5000 invånare).

    I framtagandet av riktlinjerna har olycksstatistik från tre likvärdiga tätorter undersökts där olycksorsakerna har brutits ned i sina beståndsdelar. Lämpliga åtgärder har framställts genom litteraturöversikten som består av underlag från huvudaktörerna inom området, vetenskapligt forskningsunderlag, samt exempel från likvärdiga tätorter där trafiksäkerhetsåtgärder har framtagits tidigare. I examensarbetet har fallstudier i Söderfors genomförts för att framställa riktlinjerna genom att undersöka lokal olycksstatistik, göra inventeringar och observationsstudier på orten. Söderfors har sedan använts som exemplifierad ort där de framtagna riktlinjerna har applicerats.

    Resultatet består av det sammanställda materialet från all olycksstatistik där de olika olyckskomponenterna har brutits ned samt kartor och bilder från inventeringen och observationsstudierna i Söderfors. De vanligaste olycksorsakerna är höga hastigheter samt distraherade förare. De mest olycksdrabbade platserna i Söderfors är Tamms väg och området kring Tierpsvägen. Riktlinjerna framgår under 4 huvudrubriker: gator, hastigheter, passager och beteendeförändringar. Därefter demonstreras de framtagna riktlinjerna i ett flödesschema där arbetsmetoden framställs och problemställningar matchas mot åtgärder. Riktlinjerna appliceras sedan på de olycksdrabbade vägarna samt ytterligare tre gator i Söderfors.

    För förankring till lokala förhållanden har inventering och observationsstudier varit tillräckliga metoder för att göra kopplingar och finna lämpliga åtgärdsförslag till problemområden. Mer djupgående fallstudier med fler observationstillfällen samt tekniska verktyg hade gett ett säkrare resultat. Bra komplement till vidare studier är även frågor kring ägoförhållanden samt projekt tillsammans med medborgarna om estetisk utformning av gatumiljöerna.

  • 5.
    Hellsing, Linnea
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Styrande dokument för rutiner som ska säkerställa mätnoggrannhet Fallstudie Väg 552013Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [sv]

    Allt professionellt mätningsarbete i Sverige styrs av olika dokument för att säkerställa att kvalitetskraven uppnås, anläggningsarbeten är inget undantag. Därför var syftet att sammanställa de objektspecifika kraven på väg 55 Yxtatorpet – Malmköping och undersöka vilka rutiner och kontroller som genomförs för att säkerställa kvaliteten.

    Litteraturstudier har gjorts för att sammanställa kraven, främst av dokument som finns på arbetsplatsen. Sökningar på Internet har gjorts främst för att hitta kravdokument som styr handlingarna på arbetsplatsen.

    Intervjuer genomfördes med 2 personer på arbetsplatsen, med olika arbetsuppgifter för att ta reda på om det finns rutiner och kontroller som genomförs och vilka dessa i sådana fall är.

    Resultatet blev en sammanfattning av styrande dokument speciellt de som gäller för väg 55. De styrande dokumentens krav på metoder och kontroll styrks av de två intervjuerna.

     

  • 6.
    Iglesias Estellés, Javier
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.
    Study of the ventilation system in a warehouse and a cooking school: Impact of the use of a heat exchanger system and a more optimised operating schedule2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The motivation of this project is found on the past trend of growing greenhouse gases emissions and, also growing, energy use over the world that still remains. This trend overlaps with a more recent increase in the awareness regarding the effects of human activities towards the Earth ecosystems. Thus, the upgrade of the already-in-use systems is necessary to move towards greener and more modern technologies that permit continue with the economic growth while building more sustainable societies.

    Thereby, the research focuses on the improvement of the ventilation system of a warehouse building and a cooking school located in the same plot, in an industrial area in Gävle, Sweden. The current system conditions, even consisting in some cases in recirculating air handling units, doesn’t permit the utilisation of the waste heat by bringing it back to the system.

    The strategy used during the project follows a case study scheme: looking the system, understanding it in a complete way and designing the proper solution that fulfils the requirements. The study was approached as an energy audit: with several meetings with the company, collecting airflows data with the thermo-anemometer device, sketching the required building drawings and designing the optimal solution for the company.

    Finally, the project resulted in the selection of the proper air handling unit, equipped with a heat recovery system, and the design of its ventilation duct system that permit a heat energy savings derived of the heat demand used to heat the makeup air of about 67 %. Furthermore, the occupancy study helped design the new scheduling for the ventilation periods that reduce the electricity demand of the ventilation system by 30 %. Thus, was obtained a significant energy use reduction that results in a sizeable energy cost saving.

  • 7.
    Ismail, Dijar
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering.
    Energianvändning för markkonstruktioner förlagda med ytvärme: En teknisk och ekonomisk utredning av fördelarna med att isolera under värmerören2013Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The need for snow-free surfaces at squares, bus stops, platforms, car parks and sports facilities increases and at the same time energy price rise and the environment is becoming a hotter issue. The construction of the ground heating systems often lack thermal insulation under the heating pipes, which means that the heat from the pipes not only warm up the soil surface but also heats the surrounding soil. The insulation also has more features, by insulating the risk of frost damage is minimized. The goal of this report is to demonstrate the large heat loss and energy costs in the absence of insulation under the heating system.

    The report begins with a scientific way to study and treating the soil heating system uses, and the theory involved. Furthermore it also deals with different routing principles of heat pipes depending on the facility.

    All calculations are made with so called finite element method (FEM), in COMSOL Multiphysics 3,5a, where models are created with different conditions. These models are then compared to the models but with insulation. The difference is noted and further analysis is done on the results.

    The conditions, on which the calculations are based on, are 100mm insulation. The surface is estimated to be 8000 square meters which corresponds to the size of a football field and the time the heating systems is assumed to be started is 3240 and 1296 hours depending on the model calculated.-

    The models are divided into a stationary model, a dry dynamic model, a partially dry dynamic model and then a wet dynamic model. The differences between these are partly the time they are running, but also the certain conditions and properties of the materials and how the control of heat flow in the pipes is made.

    The findings in the report show that it is economically viable to isolate sports facilities based on today's energy prices, and the investment cost insulation entails. The results also show the relatively large differences in energy consumption in each case depending on whether the construction has or lacks insulation. Despite the large investment costs estimated payback period for the investment based on a 8000 m

    2 surface with an operating time of 3240 and 1296 hours/year to be in 25 years, while the heat pipes is expected to last for about 50 years.

  • 8.
    Larsson, Erik
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology.
    Småskalig kraftvärmeproduktion för ett medelstort svenskt industriföretag: Potentialen för konventionell Rankinecykel2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The emissions of greenhouse gases need to decrease rapidly over the coming decades. Sweden has set the target to achieve net zero emissions by 2045. The industrial sector plays a crucial role in that conversion by reducing its energy needs and to convert from fossil fuels to renewables.

    This conversion will require a more robust and reliable energy system were todays centralized system has been supplemented by small decentralized production facilities. To produce heat and power closer to the consumers means less transmission losses. Small scale combined heat and power (CHP) production based on biofuels or excess heat could be a solution to reduce greenhouse gas emissions.

    The purpose of this paper is to evaluate the possibility for a mid-size Swedish industrial company to produce its own base load of heat and power with a conventional Rankine cycle. Also to evaluate the production costs depending on the size of the plant.

    The work has consisted of data collection from different manufacturers of steam turbines and steam boilers, a calculation model has been made in Excel to compare different plant sizes and in different operating scenarios. Economical evaluations has been made with the Pay-off method and the net present value method (NPV).

    The result shows that production costs for facilities with steam turbines in the size range of 10 – 100 kWel is well below the price of bought electricity and district heating. The economical evaluation generally shows on short pay-off times and positive NPV.

    A comparison of the CHP plants shows that the electric efficiency is low and the total efficiency sometimes can be lower than for the existing heat supplier of the company. This means that a switch to local CHP will have a negative impact from a system perspective, because of the increased use of primary energy resources.

    There is many parameters that affects the performance of a CHP plant but the most crucial is the operation time. To have a continuous operation over a major part of the year has a great impact on the economic performance. The low electric efficiency means that the major part of the savings gets on the heat production. This means that the CHP plant should be dimensioned to replace primarily the heat requirement.

  • 9.
    Nilfouroushan, Faramarz
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Land management, GIS. Lantmäteriet.
    Jivall, Lotti
    Lantmäteriet.
    Lilje, Christina
    Lantmäteriet.
    Steffen, Holger
    Lantmäteriet.
    Lidberg, Martin
    Lantmäteriet.
    Johansson, Jan
    Chalmers University of Technology.
    Jarlemark, Per
    SP Technical Research Institute of Sweden.
    Evaluation of newly installed SWEPOS mast stations, individual vs. type PCV antenna models and comparison with pillar stations2016In: Geophysical Research Abstracts, Vienna: European Geosciences Union , 2016, Vol. 18, article id EGU2016-4265-1Conference paper (Refereed)
    Abstract [en]

    For about two decades, SWEPOS (the Swedish Permanent GNSS network) pillar stations have been used indifferent geodetic and geodynamic studies. To keep continuous measurements of these long lived pillar stationsand at the same time modernizing the SWEPOS network, it has been decided to install new truss mast stations,equipped with modern and individually calibrated antennas and radomes, capable of tracking all new GNSSsatellites. Installation of mast stations started in 2011. Today, each pillar station in the SWEPOS permanent GNSSnetwork has a close-by truss mast station, mostly in 10 meters distance with individual calibrated Leica chokering antenna and its attachment (LEIAR25.R3, LEIT). Due to their closeness to pillars, the modern mast stationsmay provide additional information for the analysis of ground movements in Sweden e.g. to distinguish betweentectonic and geodynamic processes (e.g. land uplift in Sweden).In this study, we have used two datasets from two different seasons for 21 pillars and 21 mast stations andformed different networks. The mast network has been processed using both IGS standard (type) and individuallycalibrated PCV (Phase Center Variation) models and therefore the effect of these two different PCV models onheight components has been investigated. In a combined network, we processed all 42 stations (21 pillars+21mast) to see how this multi-baseline network (861 baselines) combination differs from independent mast or pillarnetworks with much less baselines (210 baselines). For our analysis, we used the GAMIT-GLOBK softwareand compared different networks. Ambiguity resolutions, daily coordinate repeatability and differences betweenheight components in different solutions are presented. Moreover, the GAMIT and BERNESE solutions forcombined mast and pillar networks are compared.Our results suggest that the SWEPOS truss mast stations can reliably be used for crustal deformation studies.The comparison between pillar and mast stations shows similar time series for different horizontal and verticalcomponents and their Normalized rms (nrms) and weighted rms (wmrs) are almost equal.Comparison of standard and calibrated PCV models for mast stations show notable differences in height compo-nents and reach up to14 mm. These differences are antenna-dependent and are not systematic offsets. Therefore,whenever available, individual calibrated antenna models have to be used instead of standard (type) calibratedmodels.This study is part of the Swedish CLOSE III research project between Lantmäteriet, SP, and Chalmers Universityof Technology.

  • 10.
    Paasch, Jesper M.
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Geospatial Sciences.
    Larsson, Karin
    Lunds universitet.
    Ågren, Ulrika
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Geospatial Sciences.
    Bohlin, Jonas
    Sveriges lantbruksuniversitet.
    Var finns utbildningarna?2019In: Kart och Bildteknik, ISSN 1651-8705, E-ISSN 1651-792X, no 3, p. 12-13Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Hur ser utbildningssverige ut idag när det gäller de ämnesområden som är relevanta för Kartografiska sällskapet? Detta gavs en kort inblick i artikeln Utbildningsverksamhet inom geodataområdet under det senaste decenniet i senaste numret av Sveriges Kartläggning (2018). Men vad är egentligen “relevanta ämnesområden” idag? Kartografi som ämne är idag endast en liten del av hela det område inom vilket kompetens om geodata är nödvändig. Det är idag betydligt svårare att få överblick över den ökade komplexiteten inom utbildningsområdet. Många ämnesutbildningar använder och studerar idag lägesbunden information och använder sig av geodata-/GIS-/kartografi i undervisningen.Samtidigt har branschorganisationer, myndigheter och politiker identifierat behovet av kompetens för att hantera en digitaliserad samhällsbyggnads- och informationshantering som en av nyckelfaktorerna för framgång. Trots detta var besökstalen låga på sessionerna Utveckling av grundutbildning och Kompetens för framtidens digitala samhällsbyggande under konferensen POSITION för digitalt samhällsbyggande 2030 i mars i år. Dock tog kompetensbehovet upp som centralt i många andra av konferensens presentationer.Tydligt framgår dock att ett av kärnområdena inom digitalisering i samhällsbyggandet är ökad kompetens, t.ex. inom informationshantering, standardisering, datakvalitet, kartografi och visualisering. Detta ställer nya krav på både praktiska och teoretiska/akademiska kunskaper inom geodata och digitalisering i ett bredare perspektiv. Samhällsbyggnadsprocessen är en del av en större helhet som omfattar en rad moment från planering och insamling av geodata och annan data till samhällsbyggnadsprocessen för Infrastruktur, Mark och Byggnader

  • 11.
    Uppenberg, Caroline
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Jonsson, Emma
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Innovative noise protection solutions for Sweden's first high speed railway2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis investigates and design innovative concepts of noise protection solutions (NPS) for the Swedish high-speed railway (HSR) that is planned to be built between Stockholm and Gothenburg in the near future. The planned traffic will start in 2035. The concepts have been developed through a design process, starting with a research phase of existing solutions for the problem, theory about noise and absorbing materials. Following by an analysis of all researched data to narrow down the project and the interviews with the Swedish transport administration, this in order to pinpoint the requirements for the NPS. To get opinions from people who are exposed to low frequency noise, two questionnaires were conducted with a total of 80 respondents. Because of the difficulty to find the exact target group of people who are only exposed to the noise from high speed trains, the first questionnaire was open for all people who are exposed to low frequency noise (traffic noise). The second questionnaire was published at Trafikverket Facebook page, and because of their high number of followers, people who are exposed to train noise could easily be reached. From the answers and the analyzed data, a requirement specification for the NPS was created with all the requirements that the NPS needed to have according to Trafikverkets standards and from the questionnaire. These requirements were the prerequisite used in the synthesis phase. Different brainstorming methods were used to develop a large amount of ideas. A workshop with people from the society was held to keep the creativity alive. From the first synthesis phase, six ideas out of 160 ideas were chosen by a dot evaluation, and in order to narrow down the ideas even more, a matrix evaluation was used. The matrix was built from the requirement specification to verify which ideas fit most of the requirements for a new NPS. From this evaluation, two concepts were chosen to be developed further. After a validation from Trafikverket, the two concepts were further developed, this by an open brainstorming session. Via discussions and sketching, new ideas for the concepts arose. We found solutions for the problems that arose with each concept and made final decisions about the design and material. Three concepts were 3D visualized in the CAD program Rhinoceros. Final touches of the concepts were made in Keyshot. Throughout this thesis, three concepts for noise protections for the HSR have been developed and the research question “How can innovation be created by using a design process?” have been discussed and answered.

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