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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Indoor thermal comfort and associated adaptive measures towards an energy efficient new campus in Borlänge, Sweden

Margelou, Dimitra January 2020 (has links)
Thermal comfort of the occupants is of highest importance specifically in Scandinavian countries. Especially for an educational building, both students and working staff spend most of their time indoors, therefore it is critical to guarantee a healthy and productive indoor climate environment around a whole year. Taking into account that Högskolan Dalarna plans to move into a newly renovated building in the center of Borlänge in 2022, this thesis focus on this essential topic and tries to dig out some valuable adaptive suggestions for the coming schematic design phase. In the next design phase, it aims to satisfy design requirements of Miljöbyggnad 3.0 certification at sliver level, as well as operation requirements of BREEAM InUse at very good level. Consequently, the aim of this thesis project is to have an overall thermal comfort assessment of all representative rooms in the project of the new campus building in Borlänge, Sweden. The thermal comfort assessment consists of both winter situation and summer situation. Both situations are completely under recommended study method from Miljöbyggnad 3.0 with the technical assistant of dynamic building simulation software tool IDA ICE 4.8. Several aspects have been investigated in terms of indoor thermal comfort. The first impacting element is future climate scenarios, so as to check how the future climate will affect the thermal comfort performance. Afterwards, both external and internal shading devices were individually applied to examine and quantify the benefits in terms of indoor thermal comfort. Lastly, the advanced control shading strategies were studied to further improve the thermal comfort performance based on the appropriate conventional shading method. The results showed that future climate scenario has limited impact on the thermal comfort performance when rooms are under temperature controlled via room heating and cooling units. Regarding the shading methods, the internal shading was proved to give a better overall performance. If there is the chance to implement automation shading device, the author recommends the “zone air temperature with operative temperature setpoint 21°C, in which proved to be significantly improved the thermal comfort levels that previously discovered in the vulnerable zones. Therefore, it is expected significantly to reduce the energy dependency during cooling season.
2

Energibesparingar i tegelbyggnader / Energy savings in brick buildings

Svensson, Andreas January 2018 (has links)
Detta arbete innefattar ett bostadsområde bestående av fem tegelbyggnader på Vallhallavägen 38 i Örnsköldsvik. Arbetet utfördes eftersom det fanns ett intresse av att se vilka olika typer av energibesparingar det fanns möjlighet att göra på byggnaderna och hur mycket energi som kunde sparas genom att utföra dem. Energibesparingarna som undersöktes var tilläggsisolering av ytterväggar, byten till bättre fönster, byte av ventilationssystem och implementering av solceller och solfångare på byggnaderna.   Alla beräkningar av energibesparingar utfördes i IDA ICE 4.8, som är ett simuleringsprogram utvecklat av det svenska företaget EQUA Simulation AB för studier av inomhusklimat och energikonsumtion i byggnader. Efter att alla energiberäkningar var gjorda utfördes även ekonomiska beräkningar för varje energiåtgärd som hjälp för att bedöma om en investering av energibesparingsåtgärden är rimlig att utföra eller inte. Resultatet visade att samtliga åtgärder för energibesparingar skulle sänka byggnadernas energianvändning till en viss mån, men att det troligtvis inte är klokt att investera i dem alla då vissa av dem sparade alldeles för lite energi jämfört med hur omfattande det skulle vara att installera dem i verkligheten. Den största besparingen, som var 34,5%, erhölls genom att byta ventilationssystemet och den lägsta besparingen, som var 3,6%, erhölls genom att tilläggsisolera vissa delar av byggnadernas ytterväggar. / This work is about a residential area consisting of five buildings on Vallhallavägen 38 in Örnsköldsvik, Sweden. The work was done because there was an interest in seeing what types of energy savings you could do on the buildings and how much energy you could save by doing them. The energy savings that where examined where additional insulation on the exterior walls, exchange of current windows to better ones, modification of the ventilation systems, and implementation of solar cells and solar collectors on the buildings. All calculations of the building's energy savings were done by IDA ICE 4.8, a simulation software developed by the Swedish company EQUA Simulation AB for studies of indoor climate and energy use in buildings. After all the calculations of the building's energy use were done, economic calculations were made for each type of energy saving to find out if an investment should be done or not. The results showed that all energy savings would reduce the energy use of the buildings to a certain extent, but that it probably would be wise to not invest in them all, as some of them saved very little energy compared to how comprehensive it would be to install them in the buildings. The biggest saving that resulted in a 34,5% reduction of energy use was gained by replacing the ventilation systems, while the smallest saving that resulted in a 3,6% reduction of energy was gained from additionally isolating certain parts of the building’s exterior walls.

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