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Methodological approach on the building envelope optimization using PCM.

Metodološki pristup optimizaciji omotaca zgrade pomocu fazno promenljivih materijala.

Author(s) : KONSTANTINIDOU C., LANG W., PAPADOPOULOS A. M.

Summary

The building sector has a considerable environmental impact, being responsible for about 40% of the world’s energy consumption, 30% of raw material use, 25% of solid waste, 25% of water use, 12% of land use, and 33% of the related global greenhouse gas (GHG) emissions. Specifically in Europe, non-residential buildings comprise a quarter of the EU building stock and cause approximately one third of this stock’s energy consumption, while office buildings are among the most crucial contributors to demand growth. The environmental improvement of this stock is thus a key target for the European countries. The building envelope presents an opportunity to significantly reduce the building energy demand, while improving its environmental impact through its life-cycle. Specifically, the thermal performance of the building envelope, can be determined by the materials used in its construction with key parameters the thermal protection of the building envelope and the heat capacity of the enclosing components. The use of latent heat storage by utilizing Phase Change Materials (PCM) in the building envelope has received much attention during the past decades and provides a potential for better indoor thermal comfort for occupants, as well as for overall lower energy consumption. In several studies, PCMs have been incorporated into building envelopes to enhance indoor thermal comfort and energy performance reporting the positive impact of PCMs on the building annual cooling and heating loads in various climate zones. Furthermore, results of past works have demonstrated a positive environmental
impact from the incorporation of PCM in buildings. This paper presents an overview of a methodological approach for building envelope optimization in various climatic types based on the Köppen classification map, using a combination of dynamic
simulation and multi-objective optimization using NSGA-II genetic algorithm. The proposed methodology aims to optimize the building envelope in respect to its carbon emissions and cost, where cost includes both investment and operational costs, while keeping the indoor thermal comfort in specific constraints. In order to effectively optimize building design, the majority of the decisions have to be made very early in the design process. The challenge in this case is to achieve a high performance design combining the maximum overall economy, comfort and architectural quality with the minimum use of energy and resources. The application of computational methods of design optimization is therefore distinctly advantageous, if not absolutely necessary.

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Pages: 14 p.

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Details

  • Original title: Metodološki pristup optimizaciji omotaca zgrade pomocu fazno promenljivih materijala.
  • Record ID : 30020232
  • Languages: English
  • Subject: Environment
  • Source: 47th International HVAC&R Congress and Exhibition.
  • Publication date: 2016/12

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