Energy consumption modelling of a passive hybrid system for office buildings in different climates

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yi Zhang
  • Thilhara Tennakoon
  • Yin Hoi Chan
  • Ka Chung Chan
  • Sau Chung Fu
  • Bao Ling Huang
  • Shu Huai Yao
  • Hui He Qiu
  • Christopher Y.H. Chao

Detail(s)

Original languageEnglish
Article number121914
Journal / PublicationEnergy
Volume239
Online published31 Aug 2021
Publication statusOnline published - 31 Aug 2021

Abstract

Thermochromic smart windows and radiative coolers are two passive cooling technologies, whose adoption as windows and roofs, respectively, is feasible for building energy-saving. However, to the authors' knowledge, the investigation of annual energy performance incorporating both techniques is scarce at the time of writing. Therefore, a passive hybrid system involving both technologies is proposed in this study. A perovskite thermochromic smart window and three different radiative coolers were chosen based on their superior performance. The energy performance of the passive hybrid system in a prototypical medium-sized office building was simulated using EnergyPlus and the results were rigorously analyzed. Both thermochromic smart window and radiative cooler could reduce total energy consumptions by up to 10.6% and 23.0%, respectively, regardless of building's year of completion, while the synergic system saved up to 32.0%. Among the chosen cities of various climates, thermochromic smart windows and radiative coolers perform better in cities where cooling demand dominates. The west- and east-facing thermochromic smart windows could mitigate more energy usage in contrast to the other orientations. If this passive hybrid system can be offered at a reasonable cost, the technology is likely to be a viable energy-efficient option for buildings.

Research Area(s)

  • Energy simulation, Green building, Passive cooling, Passive radiative cooler, Thermochromic smart window

Citation Format(s)

Energy consumption modelling of a passive hybrid system for office buildings in different climates. / Zhang, Yi; Tennakoon, Thilhara; Chan, Yin Hoi; Chan, Ka Chung; Fu, Sau Chung; Tso, Chi Yan; Yu, Kin Man; Huang, Bao Ling; Yao, Shu Huai; Qiu, Hui He; Chao, Christopher Y.H.

In: Energy, Vol. 239, 121914, 15.01.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review