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Grunden är grundläggande: En inblick i uteluftsventilerad krypgrund och kall källare
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
2012 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The purpose of this bachelor degree project is to construct a house located in Kiruna that matches the requirements of the Swedish National Board of Housing, Building and Planning. The house is built to accommodate single individuals and small groups of two to three people. Furthermore, a low energy loss is pursued by using well-insulated roof and walls. The house is 100 square meters and heated by an under floor heating system that is connected to a geothermal heat pump. The house is ventilated by an FTX system with an efficiency of 84%. The house has a total energy of 93.2 kWh/m

2year. A cost estimate has also been done for the house where the energy costs are about 14 600 SEK and the total cost of the house is approximately 830 000 SEK. In addition, a depth study on various foundations was made. It’s purpose is to examine how a typical foundations is designed and compare different types of foundations regarding moisture conditions, among other things. Various technical solutions for the compared foundation types will be addressed. To get such a good idea of the different facilities as possible the study treats only two alternatives, crawl space and basement. A simulation is performed for each option in order to investigate what happens in a crawl space and in a basement for a whole year. Recently, problems with moisture in the crawl space and basement attracted much attention in the media. Over time, the technical solutions developed in which the majority today is to reduce the appearance of moisture by moving the moisture away mechanically or to heat up the foundation so that the relative humidity decreases during the most critical months and thus reduce the presence of moisture. After an examination of the technical solutions it has been made clear that there will constantly appear problems, especially during the warm months, which are considered critical. As the solution takes place on one front, problem emerges on other fronts. An example of this is when thermal insulation is used in the foundation of the crawlspace. The idea is to lower the temperature of the foundation during the warmer months so that no evaporation from the soil to the foundation will take place. However, the ground’s high thermal inertia affects the temperature, which increases the relative humidity in the foundation. Something that was found during the study is that there currently is no solution to solve moisture problems in those foundations altogether. The problem is and has always been because of the construction.

Place, publisher, year, edition, pages
2012. , 93 p.
Keyword [sv]
Grundläggning, fukt, värmeförlust, effektbehov
National Category
Civil Engineering
URN: urn:nbn:se:kth:diva-102416OAI: diva2:552655
Subject / course
Built Environment
Educational program
Master of Science in Engineering - Urban Management
Available from: 2012-09-27 Created: 2012-09-14 Last updated: 2012-09-27Bibliographically approved

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