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Investigation on the appropriate floor level of residential building for installing balcony, from a view point of energy and environmental performance. A case study in subtropical Hong Kong

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  • Chan, A.L.S.

Abstract

In a residential building, a balcony of an upper floor can act as an overhang; and provide solar shading and reduction in electricity consumption of air-conditioner (A/C) for a flat on the underneath floor. However, some residential flats located on the lower levels may receive substantial self-shading effect from some adjacent flats in the same building block, leading to an insignificant shading effect from a balcony. As there is substantial amount of energy consumed and pollutant generated during the production and disposal of a balcony, it is vital to investigate the energy and environmental performance of residential flats installed with balconies at various floor levels. The objective of this study is to investigate an appropriate floor level of a residential building above which balconies should be incorporated. A 21-story residential building was modeled using EnergyPlus. Simulation results indicated that, for a west-facing flat, only the flats located on 15/F to 20/F can give acceptable environmental payback periods, ranging from 58.3 years to 40.7 years, i.e. within the lifespan (60 years) of a building. The corresponding annual savings in A/C consumption range from 234.9 MJ (2.60%) to 336.7 MJ (3.57%). The research methodology and findings are presented in this paper.

Suggested Citation

  • Chan, A.L.S., 2015. "Investigation on the appropriate floor level of residential building for installing balcony, from a view point of energy and environmental performance. A case study in subtropical Hong Kong," Energy, Elsevier, vol. 85(C), pages 620-634.
    • Handle: RePEc:eee:energy:v:85:y:2015:i:c:p:620-634
    DOI: 10.1016/j.energy.2015.04.001
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    References listed on IDEAS

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    1. Chan, A.L.S. & Chow, T.T., 2014. "Thermal performance of air-conditioned office buildings constructed with inclined walls in different climates in China," Applied Energy, Elsevier, vol. 114(C), pages 45-57.
    2. Florides, G. A. & Tassou, S. A. & Kalogirou, S. A. & Wrobel, L. C., 2002. "Measures used to lower building energy consumption and their cost effectiveness," Applied Energy, Elsevier, vol. 73(3-4), pages 299-328, November.
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    2. Pan, Wei & Qin, Hao & Zhao, Yisong, 2017. "Challenges for energy and carbon modeling of high-rise buildings: The case of public housing in Hong Kong," Resources, Conservation & Recycling, Elsevier, vol. 123(C), pages 208-218.
    3. Premrov, Miroslav & Žegarac Leskovar, Vesna & Mihalič, Klara, 2016. "Influence of the building shape on the energy performance of timber-glass buildings in different climatic conditions," Energy, Elsevier, vol. 108(C), pages 201-211.
    4. Reyna, Janet L. & Chester, Mikhail V. & Rey, Sergio J., 2016. "Defining geographical boundaries with social and technical variables to improve urban energy assessments," Energy, Elsevier, vol. 112(C), pages 742-754.

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