Influence of the building geometry on energy efficiency of timber-glass buildings for different climatic regions
The presented study is focused into examination of the building shape influence on the annual energy need for heating and cooling by taking into account climate data for six European cities located in different climatic regions. The research is performed on timber-glass box-house models para-metrically varying building aspect ratio (L/W) and number of storeys (single- and two-storey), while the glazing - to - wall area ratio for southern façade is kept constant for all treated models (AGAW=35%). The influence of the mentioned parameters on the annual energy need is thoroughly analyzed and leads to completely different conclusions drawn for cold and warm climate conditions. According to the presented results the recommendation for cold climate conditions is to design two-storey houses rather than single-storey ones. Additionally, the increasing aspect ratio shows a positive influence on the energy need reduction. In the case of warm climate conditions the findings are almost opposite to those for cold climates. The total energy need consist predominantly of data for cooling, whereby the energy need increases with the increasing aspect ratio. On behalf of specifics related to warm climate a further study was conducted for Athens with an additional examination of the building components with higher thermal transmittance (U). The results of the research for Athens show that designers are practically free to choose between single-storey or two-storey buildings with no significant impact on the building energy behavior.
The main output of the current study is to offer designers general information on energy efficient design parameters for single-family timber-glass buildings under influence of different European climatic conditions.
Diakaki C., Grigoroudis E., Kabelis N., Kolokotsa D., Kalaitzakis K., Stavrakakis G. A multi-objective decision model for the improvement of energy efficiency in buildings. Energy, 2010; 35:5483-5496. https:// doi.org/10.1016/j.energy.2010.05.012
Wurm J. Glass Structures – Design and Construction of Self-supporting Skins. Birkhäuser Verlag AG, Basel, Boston, Berlin; 2007.
Ian Hsü + Gabriel Rudolphy, SIP m3 House, Chile, 2014.
Schlyter + Gezelius Arkitektkontor, Wood House, Sweden, 2010.
Architecture Studio Nolla, Hybrid Wooden House, Japan, 2015.
Depecker P., Menezo C., Virgone J., Lepers S. Design of building shape and energetic consumption. Building and Environment, 2001; 36(5):627-635. https://doi.org/10.1016/S0360-1323(00)00044-5
Albatici R., Passerini, F. Bioclimatic design of buildings considering heating requirements in Italian climatic conditions - A simplified approach. Building and Environment, 2011; 46(8): 1624-1631. https:// doi.org/10.1016/j.buildenv.2011.01.028
Ratti C., Baker N., Steemers K. Energy consumption and urban texture. Energy and Buildings, 2005; 37(7): 762-776. https://doi.org/10.1016/j.enbuild. 2004.10.010
Danielski I., Fröling M., Joelsson A. The Impact of the Shape Factor on Final Energy Demand in Residential Buildings in Nordic Climates, Conference: World Renewable Energy Forum, WREF 2012, Including World Renewable Energy Congress XII and Colorado Renewable Energy Society (CRES) Annual Conference, Volume 6; 2012.
Rodrigues E., Amaral A. R., Rodrigues Gaspar A., Gomes A., How reliable are geometry-based building indices as thermal performance indicators?, Energy Conversion and Management, Volume 101, 1 September 2015, Pages 561-578, ISSN 0196-8904. https://doi.org/10.1016/j.enconman.2015.06.011
Ling, C.S., Ahmad, M.H., Ossen, D.R., The effect of geometric shape and building orientation on minimizing solar insulation on high-rise buildings in hot humid climate. Journal of Construction in Developing Countries; 2007; 12 (1): 27-38.
Inanici N.M., Demirbilek F.N. Thermal performance optimization of building aspect ratio and south window size in five cities having different climatic characteristic of Turkey. Building and Environment,2000; 35(1):41–52. https://doi.org/10.1016/S0360-1323(99)00002-5
Chiras D. The Solar House: Passive Heating and Cooling. Chelsea Green Publishing, White River Junction, VT.; 2002.
Hemsath T. L., Bandhosseini K.A., Sensitivity analysis evaluating basic building geometry's effect on energy use, Renewable Energy, Volume 76, April 2015, Pages 526-538, ISSN 0960-1481. https://doi.org/10.1016/j.renene.2014.11.044
Aksoy U. T., Inalli M., Impacts of some building passive design parameters on heating demand for a cold region, Building and Environment 41 (2006) 1742–1754. https://doi.org/10.1016 /j.buildenv.2005.07.011
EN ISO 13790:2008(en) ISO 13790:2008(en) Energy performance of buildings — Calculation of energy use for space heating and cooling, International Organization for Standardization; 2008.
Premrov, M., Žegarac Leskovar, V., Mihalič, K. Influence of the building shape on the energy performance of timber-glass buildings in different climatic conditions. Energy, 2016; 108: 201-211. https://doi.org/10.1016/j.energy.2015.05.027
Szokolay, S. V. Introduction to Architectural Science, The Basis of Sustainable Design, Elsevier, Oxford; 2008.
Žegarac Leskovar V., Premrov M. Energy-efficient timber-glass houses. Springer Verlag, 2013.
Žegarac Leskovar V., Premrov M. An approach in architectural design of energy efficient timber buildings with a focus on the optimal glazing size in the south-oriented façade. Energy and Buildings, 2011; 43(12):3410–3418. https://doi.org/10.1016/j.enbuild.2011.09.003
PHPP 8 – Passive house design package.
Meteonorm Software, Meteotest, Bern Switzerland.