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Talks and Poster Presentations (with Proceedings-Entry):

A. Korjenic, M. Sofic, T. Bednar:
"Development and Optimization of Future-Oriented Construction Systems for Passive Cooling and Heating";
Talk: 4th International Building Physics Conference, Istanbul (invited); 2009-06-15 - 2009-06-18; in: "Energy Efficiency and New Approaches", Band 1/Istanbul (2009), ISBN: 978-975-561-350-5; 6 pages.



English abstract:
Summer room temperatures in buildings are often too high or fluctuate too much. The main aim of this investigation is to optimize the energy performance of buildings, and also to find ideal wall construc-tions for different climates. The energy demand for heating and cooling for different climates was calculated using whole building simulations whereby window size and orientation, outdoor climate and thermal quality of the external wall constructions were systematically varied. Different external wall constructions with the same U-values were investigated comparing brick, reinforced concrete, wood and brick filled with PCM (Phase Change Materials). Their effects on internal climate and energy demand are presented in this study. Air conditioning systems are often necessary to avoid overheating during the summer. Building constructions, especially external and internal walls were developed and refined during the project to provide constant tem-peratures in both summer and winter without depending upon mechanical systems. It is important to consider that the cooling energy demand increases if window areas are excessively large. The storage capacity of building materials was also investigated. The results of the investigation have shown that using the PCM within the wall construction increases the thermal storage capacity of the overall assembly and increased en-ergy savings are achievable. Up to half of the cooling demand can be reduced if the thermal storage capacity is high. Walls and floor slabs are able to store thermal energy. The energy demand for heating in winter and cooling in summer can be reduced when a building contains a high thermal storage capacity.

Keywords:
energy demand for heating and cooling, Phase Change Materials, thermal storage capacity, Maximum Summer Room Temperature

Created from the Publication Database of the Vienna University of Technology.