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Kvarteret Kajutan - Från lågenergi till plusenergi
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
2010 (Swedish)Independent thesis Advanced level (professional degree), 30 credits / 45 HE creditsStudent thesisAlternative title
A study of a low energy house - methods for improving energy performance while maintaining cost efficiency (English)
Abstract [en]

Energy and environmental demands regarding buildings have become an increasingly

discussed topic, both in Sweden and in Europe as a whole. The general trend indicates

that greater efforts are being put into the energy efficiency of the built environment.

There are already numerous examples of houses with a low energy demand, and the

number of low energy buildings is constantly growing.

At the time being, the maximum level for energy demands for housing in Stockholm is

110 kWh/m

2year, but as soon as next year the limit will be changed to 90. The Swedish

agency Energimyndigheten is currently conducting a project to interpret the EU Directive

on the so-called Nearly zero energy buildings, and the preliminary results indicate that

the level of requirements for purchased energy will end up with about 55 kWh / m


which is in line with

today’s recommendationsfound in FEBY's Kravspecifikation för


Starting with a low-energy house in Henriksdalshamnen in Stockholm, we have analyzed

various energy-efficiency measures and their influence on power and energy needs. The

financial aspects associated with the measures have been studied using a model of life

cycle costs.

The measures were initially studied individually to give an idea of how much impact they

each had. Three packages of measures were then put together, where the most energyand

cost-effective solutions were included.

The first package of measures aimed to achieve the standard for Passive houses, and was

accomplished by the replacement of windows and an improvement in airtightness. The

economic analysis showed that this package was not viable. The second package of

measures aimed to as much as possible reduce the building's energy needs and at the

same time demonstrate profitability. The results showed a more than halved energy

demand and the economic calculations indicated that it even turned a profit.

Finally, the possibility of installing energy-producing systems in order to achieve a plus

energy house was studied. The idea was to examine whether it was possible to cover up

the need for purchased energy by using solar and wind power, while maintaining

profitability. The analysis shows that this would be difficult to achieve, primarily because

of the high investment costs entailed, and the difficulties associated with the regulations

regarding the sale of energy.

Place, publisher, year, edition, pages
Examensarbete Byggnadsteknik, 406
Keyword [sv]
Lågenergi, plusenergi
National Category
Building Technologies
URN: urn:nbn:se:kth:diva-35048OAI: diva2:424308
Subject / course
Building Technology
Available from: 2011-08-19 Created: 2011-06-17 Last updated: 2011-08-19Bibliographically approved

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