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Research Article

Effect of geometric factors on the energy performance of high-rise office towers in Tianjin, China

Li Liu1, Di Wu1, Xiaojun Li2, Shanshan Hou2, Conghong Liu1( ), Phil Jones2
School of Architecture, Tianjin University, Weijin Road, Tianjin 300072, China
Welsh School of Architecture, Cardiff University, King Edward VII Avenue, Cardiff CF10 3NB, UK
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Abstract

To improve energy efficiency of office buildings in Tianjin, we select a prototypical high-rise office tower as an example and focus on the effect of geometric factors on building energy performance. These factors include the orientation, plane shape, floor area, plane shape factor (the ratio of the plane length to the plane width, only as regards to a rectangle-shaped plane), floor height, floor number and window-to-wall ratio. The simulation is performed in DesignBuilder, which integrates artificial lighting with instantaneous daylight during the energy simulation process. The geometric factors of the defined prototype are examined in both single-parameter and multi-parameter evaluations. As to the multi-parameter results, the energy saving rate can vary by up to 18.9%, and reducing the floor height is observed to be the most effective means of reducing annual total end-use energy consumption, followed by increasing the plane shape factor and reducing the floor area. The results can serve as a reference for passive design strategies related to geometric factors in the early design stage.

Keywords

energy performancegeometric factorshigh-rise office towersTianjin

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Building Simulation
Volume 10 Issue 5,
October 2017
Pages 625-641
DOI: 10.1007/s12273-017-0359-y
Cite this article:
Liu L, Wu D, Li X, et al. Effect of geometric factors on the energy performance of high-rise office towers in Tianjin, China. Building Simulation, 2017, 10(5): 625-641. https://doi.org/10.1007/s12273-017-0359-y

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Received: 19 September 2016
Revised: 23 January 2017
Accepted: 09 February 2017
Published: 27 March 2017
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2017
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