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Life Cycle Optimization of Extremely Low Energy Dwellings

Department of Architecture and Arts, University College Provinciale Hogeschool Limburg, Campus Diepenbeek Building E, B-3590 Diepenbeek, Belgium, gverbeeck2{at}mail.phl.be

Hugo Hens

Laboratory of Building Physics, Catholic University of Leuven Kasteelpark Arenberg 40, B-3001 Leuven, Belgium

A global methodology is developed to optimize concepts for extremely low energy dwellings, taking into account energy use, environmental impact, and financial costs over the life cycle of the buildings. Energy simulations are executed with TRNSYS. The ecological impact is evaluated through a life cycle inventory of the whole building, whereas costs are evaluated through a cost-benefit analysis. The multi-objective optimization problem is tackled by combining genetic algorithms and the Pareto concept. First, the optimization methodology is presented. Subsequently, the validity as well as the strengths and weaknesses of the methodology are discussed. Finally, the main results are presented followed by a discussion of the trade-off curves of primary energy consumption and net present value, an analysis of the embodied energy, and a study of the impact of economic parameters, such as price evolutions above inflation and discount rate.

Key Words: multi-objective optimization • genetic algorithms • life cycle inventory • extremely low energy dwellings • economic trade-off.

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Journal of Building Physics, Vol. 31, No. 2, 143-177 (2007)
DOI: 10.1177/1744259107079880


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This Article Abstract Free Full Text (Free PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Verbeeck, G. Articles by Hens, H. Search for Related Content Social Bookmarking                         What's this?