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En jämförelse av energianvändning och klimatpåverkan av två olika byggnaderAssad, Ibrahem, Majzoub, Mhd Nawras January 2022 (has links)
The composition will focus on valuations of energy during production, the construction process and the building's operation and with regards to climate impact and resource use. In addition, energy performance in different buildings will be examined. Another important factor that the work will focus on is energy consumption. There is already a lot of research on energy efficiency in buildings and our work should be based on the latest research and new findings in this area. The first step in the work was to contact HFAB through telephone calls and email interviews. Furthermore, the energy efficiency has been calculated for the simulated villa. Later, climate calculations were made for Nerven 1, which is an apartment building. Data coming from HFAB applies to apartment buildings. Subsequently, environmental calculations have been made for the simulated villa, which showed a result that the villa is more environmentally friendly compared to apartment buildings. The main reason for this is the poor impact of concrete on the environment. Apartment buildings use significantly more concrete than the villa, which gives a bad environmental impact and results in the villa being friendlier.
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En analys av hur slitsade stålreglar påverkar en väggs värmeegenskaper / An analysys of how slitted steel studs is affecting the heat traits of a wallMårtensson, Filip January 2022 (has links)
No description available.
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Integrerad projektering och produktion av industrigolv : methder för att öka kvalitetenHedebratt, Jerry January 2004 (has links)
No description available.
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Rock mass response during high pressure groutingGothäll, Rikard January 2006 (has links)
The sealing of hard jointed rock by grouting involves several complicated mechanical systems. The result is a complex coupled system of hydro- logical and mechanical precesses. In order to determine the higher order effects of the resulting system the fracture deformations must be assessed. This requires a model that mimics the mechanical behaviour of not only fractures under normal load but also the entire rock mass system. This model indicates that there are two dominant regimes involved; a permeation regime and a high pressure regime. The pressure limit that separates permeation grouting from high pressure grouting can then be found to be closely related to the in situ stress. In the high pressure regime the deformations may be large but very situation-dependent. The principal deformational eigenmodes of some boundary conditions are considered. The analysis indicates that the usage of high pressure grouting can be both benficial to the operation as well as increase the inflow of water to the excavation. / QC 20101115
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Low-energy houses - visions and reality : a statistical survey on the real energy consumption in 400 Swedish and German housesWeber, Tim January 2002 (has links)
QC 20110617
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Ingjutna ventilationskanalers påverkan på luftljudsisolering i flerbostadshus / The impact of cast-in ventilation ducts on airborne sound insulation in multi-residential housesNäslund, Emma January 2022 (has links)
Good sound insulation is highly valued by Swedish tenants. To be able to achieve that, one must look at many aspects, such as room volumes, floor planes, flooring, but also what materials that are to be built with and how it ́s constructed. The use of cast-in ventilation ducts in the load-bearing structures is a common method in Sweden. This is a method that is well suited when large residential houses in concrete are to be built and you want a flexible way to lead the ventilation ducts in the building without them taking up unnecessary space or having to be led longer distances than necessary. At present, WSP acoustics in Umeå uses two different methods with reasonable assumptions to calculate the impact of cast-in ventilation ducts on airborne sound insulation, but they wish to verify which of the methods is most reliable. In one method, the wall with the ducts is thought of as a hollow core slab with the same corresponding weight as the actual wall. In the second method, the weight lost at the channels has been calculated and then the wall depth is reduced accordingly. The purpose is to evaluate whether these approximate calculation methods regarding the impact of embedded ducts on airborne sound insulation are consistent with the results of field measurements. Field measurements show that the airborne sound insulation becomes gradually worse with an increased number of ducts, and this is most clearly seen in the range between 400 and 3150 Hz. The methods do not differ by more than 1 dB in weighted standardized sound level difference compared to the field measurements and can therefore both be used in designs. The comparison between the calculation methods shows that both give equivalent results, but the method with reduced wall depth is recommended. / God ljudisolering i sin bostad värderas högt hos hyresgäster i Sverige. För att uppnå detta måste många aspekter beaktas som till exempel planlösning, rumsstorlek, golvbeläggning, men inte minst vilket material som ska byggas med och hur konstruktionerna är uppbyggda. Att använda sig av ingjutna ventilationskanaler i de bärande konstruktionerna är en vanlig metod i Sverige. Det är en som metod lämpar sig väl när stora bostadshus i betong ska byggas och det önskas ett smidigt sätt att leda ut ventilationskanalerna i byggnaden utan att de tar onödig plats eller behöver ledas längre sträckor än nödvändigt. I dagsläget använder sig WSP akustik i Umeå av två olika metoder med rimliga antaganden för att beräkna ingjutna kanalers påverkan på luftljudsisolering. De önskar verifiera vilken av beräkningsmetoderna som är mest tillförlitlig. I den ena metoden approximeras väggen med kanalerna som ett håldäck med samma motsvarande tyngd som den verkliga väggen. I den andra metoden räknas tyngden som förloras vid kanalerna bort och väggdjupet reduceras sedan efter det. Syftet med denna rapport är att utvärdera huruvida approximativa beräkningsmetoder gällande ingjutna kanalers påverkan på luftljudsisolering, överensstämmer med resultatet från fältmätningar. Fältmätningarna visar att luftljudsisoleringen blir sämre med ökat antal kanaler och det framgår tydligast i spannet mellan 400 och 3150 Hz. Metoderna skiljer sig inte mer än 1 dB i vägd standardiserad ljudnivåskillnad mot fältmätningarna och kan därför båda användas i projekteringar. Jämförelsen mellan beräkningsmetoderna visar att båda ger likvärdiga resultat, men metoden med reducerat väggdjup rekommenderas.
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LCA på stomme för flerbostadshus : En jämförelse av betong och KL-träHedman, Christoffer, Källman, Peter January 2022 (has links)
Detta arbete är genomfört med målet att tydliggöra hur en byggnads miljöbelastning kan reduceras. I en fallstudie av ett flerbostadshus i Gävle jämförs miljöbelastningen med hänsyn till utsläpp av koldioxid, övergödning och försurning. En komprimerad LCA utförs från två olika fall där den bärande stommen genomgår en förändring av betongväggar till väggar av korslimmat trä. Huset som utgör objekt för arbetet är hämtat från en vetenskaplig artikel som är gjord med syftet att jämföra de bärande egenskaperna hos trä- och betongväggar. Den komprimerade LCA:n har gjorts med mjukvaran One Click LCA som är ett beräkningsverktyg med fullt stöd för de krav och certifieringar som berör arbete med LCA. Resultatet visar tydligt att bytet till träelement i stommen bidrar till ett reducerat utsläpp och vidare så finns det stora miljömässiga besparingar att göra vid större utnyttjande av trä i konstruktioner. / This work is conducted with the aim of making clear how a building's environmental impact can be reduced. In a case study of an apartment building in Gävle, the envi-ronmental impact is compared with regard to carbon dioxide emissions, eutrophica-tion and acidification. A compressed LCA is performed from two different cases where the load-bearing frame undergoes a change of concrete walls to walls of CLT panels. The house that is the subject of the work is taken from a scientific article made for the purpose of comparing the load-bearing properties of wooden and con-crete walls. The compressed LCA has been made with the One Click LCA software, which is a calculation tool with full support for the requirements and certification that concerns work with LCA. The results clearly show that the change to wooden elements in the frame contributes to a reduced emission and furthermore, there are large environmental savings to be achieved with greater utilization of wood in struc-tures.
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Feasibility of using silica aerogel as insulation for buildingsHuang, Lang January 2012 (has links)
For recent years, silica aerogel has attracted great attention and been extensively used in different technical fields owning to its remarkable properties in optics, mechanics, acoustics etc. especially in thermology. The thermal conductivity of a number of different insulation materials has been measured both by Transient Plane Source (TPS) and a new designed experiment−Guarded hot plate method respectively. It turns out that silica aerogel has the lowest thermal conductivity value of 0.0144 W/mK and accordingly the highest thermal resistance among all those common insulation materials which makes it a good choice in buildings insulation industry. Besides, the energy-saving and heating-cost of silica aerogel used as building insulations is calculated by the method of Life cycle cost analysis method (LCCA), and the result shows silica aerogel can help to reduce the annual heat loss of a building by 50.9% and also help to reduce about half of the annual heating costs when compared with other insulations. Due to the excellent thermal performances, however, silica aerogel has much higher selling prices (75.24 US$/m2) than the other normal insulation materials, and then a comparatively longer payback time (3.54 years) has to be taken than the other competitive solutions (0.22 years for EPS, 0.07 years for XPS, etc.). And the feasibility of using silica aerogel as building insulations is discussed.
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Utbyggnad Av Eriksberg / Eriksberg ExpasionCuevas, Sebastian, Eklund, Anders January 2011 (has links)
During the years of development in the 60s and 70s the need for new housing in Sweden arose. Sweden was going to be the most modern country in the world. This period has later been called “the time of the big programmes”. One of the parts in this building of a welfare society was a large policy of building politics with few counterparts in history. This large scale production of new housing required new systems of production, planning and organization.The housing blocks which was the result of this and that today represents 25% of the total infrastructure in Sweden, is called “the million programme”.The goal was to solve the severe problem of lack of housing and during a short time build a one million apartments to improve the standard of living. The majority of dwellings were to be apartments but many villa neighborhoods were also counted among “ the million programme”.During the time of the million program approximately 1 000 600 dwellings were built. This programme has come to represent the goals of that period and the esthetic visions. As a consequence a lot of old houses that no longer held the acquired standards were torn down.So even though “the million programme” was completed we are still in need of apartments in those areas.Therefore we have chosen to analyse and explore the possibilities of expansion of existing buildings on a location in Stockholm. The reason for this project is to analyse, organize and suggest the best course of action to take during an expansion of these apartments. These expansions will be roof apartments and we will look into the possibilities. We will consider architecture and construction on these buildings.During the course of this project we have become convinced that by using the construction methods that we have analyzed and concluded in our project, you will be able to increase the effectiveness of expansions on buildings of “the million program”.
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Plusenergi och dess installationer : Kvarter Trettondagen / Plus energy and its installationsDavidsson, Hanna, Gustafson, Ellika January 2011 (has links)
The latest thing in the area of environmental building today is energy-plus-house. The idea behind the energy-plus-house is to create a house that produces more energy than it consumes. To accomplish this, the house uses renewable energy, in this particular case solar energy. With the help from a proper construction and thoughtfully projected installations you can achieve a surplus of energy. The surplus energy can then be sold to the surrounding buildings and thereby conduce to a financial profit for the household. We have focused on the project “Kv. Trettondagen” which has been designed by JM Entreprenad AB on the order of Stockholmshem AB. Together with JM Entreprenad AB we have compiled this study which focuses on calculations of the installations. We have implemented a study where we compare the energy performance of “Kv. Trettondagen” with the growing energy requirements of today.There is a requirement that ”Kv. Trettondagen” should reach the technical standard of a passive house. Calculations by hand does not give a result that matches those requirements but calculations using data-driven energy calculation programs shows a result that meets the requirements of a passive house.”Kv. Trettondagen” will produce a energy surplus of 4000 kWh per year and that surplus is a pure profit for the owner Stockholmshem AB. The surplus that’s produced comes from solar panels and is a surplus of heat energy.Results in this report shows that “Kv. Trettondagen” meets the requirements for being a labeled as a Svanen building. It also shows that “Kv. Trettondagen” reaches a high rating in the environmental certification of Miljöklassad byggnad. From our point of view “Kv. Trettondagen” will accomplish a good result when being certified by LEED and BREEAM.
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