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. 2021 Jun 11:37:133-145.
doi: 10.1016/j.jare.2021.06.005. eCollection 2022 Mar.

Optimizing daylight utilization of flat skylights in heritage buildings

Mohamed Marzouk  1 , Maryam ElSharkawy  2 , Ayman Mahmoud  3
Affiliations

Optimizing daylight utilization of flat skylights in heritage buildings

Mohamed Marzouk et al. J Adv Res. .

Abstract

Introduction: Adapted reuse in old historical buildings has been a real challenge since the state of deterioration is usually found severe, and suggested retrofitting is applied with high delicacy to preserve the building originality. Additionally, on altering the potential users' activity, special considerations are required to fulfill the new needs. Daylight in historical buildings has a special significance in conceiving the massive artistic content within the interior spaces, in providing visual comfort for users, and affecting the total energy performance.

Objectives: The main goal is to meet the new daylight requirements in heritage building spaces, and to rely on relaxing daylight instead of artificial light sources during the day.

Methods: The research is implemented in Tosson Palace, a historical palace in Egypt, where a top-lit space's daylight performance is assessed using Rhino + Grasshopper's Diva package, then the skylight is parametrically configured to optimize daylighting conditions using Radiance, and Daysim engines in high intensity solar climate. Optimization of skylight glazing technologies and skylight size is conducted by changing optimization parameters including the number the two perpendicular mullions grid, and mullions' depth, which also acts as a shading element. These parameters are genetically optimized using a multi-objective octopus plugin and the optimized configuration is evaluated using LEED v4.1 in Spatial Daylight Autonomy (sDA), and Annual Sun Exposure (ASE) criteria that show both the daylight adequacy, and the comfortable daylight exposure percentages in the skylight covered space.

Results: The outcomes offer guidance for heritage adapted reuse in hot climatic conditions with minimum design interventions to meet the original design and provide potential users' comfort conditions. Furthermore, enhancement of both visual, and thermal conditions through the skylight configurations is to be studied.

Conclusion: The selected optimum case succeeded in compromising the assessing metrics such that ASE was reduced by 38% from the base-case, avoiding unpleasant direct daylight, and providing protection for interior artifacts from sunlight and achieving a moderate uniform daylight distribution on both affected floors levels.

Keywords: Daylighting; Genetic algorithms; Heritage Buildings; Optimization; Skylight; Visual comfort.

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Conflict of interest statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Figures

None
Graphical abstract
Fig. 1
Fig. 1
Flowchart of adopted Research Methodology.
Fig. 2
Fig. 2
Tosson Palace main staircase and above skylight (source:authors, 2019).
Fig. 3
Fig. 3
Grasshopper script for skylight daylight analysis.
Fig. 4
Fig. 4
Palace model description.
Fig. 5
Fig. 5
Sun path diagram for the analyzed main hall of the palace.
Fig. 6
Fig. 6
Pareto-Frontier curve of the analyzed parameters.
Fig. 7
Fig. 7
Daylight performance visualization for the Base Case.
Fig. 8
Fig. 8
2D preview for the optimization results.
Fig. 9
Fig. 9
Optimum compromised solution (Case 1).
Fig. 10
Fig. 10
Optimum compromised solution (Case 2).
Fig. 11
Fig. 11
Optimum visual comfort solution (Case 4).
See this image and copyright information in PMC

References

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