Investigation on the potential of improving daylight efficiency of office buildings by curved facade optimization

Lu, Shuai; Lin, Borong; Wang, Chunxiao

doi:10.1007/s12273-019-0586-5

Cited by 16 publications

(6 citation statements)

References 37 publications

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“…According to past studies, the typical GA population size is between 30 and 200. 67,68 The appropriate GA settings in the Octopus plugin were assigned based on earlier studies, 51,65,69,70 as shown in Table 2, and specifics regarding the Radiance daylight characteristics were also included. Because Octopus can only address minimization problems, the optimization process is limited to minimizing the goals; thus, the goal to be maximized, which in this instance was side, and UDI should be multiplied by −1.…”

Section: Methodsmentioning

confidence: 99%

Optimizing daylighting in lecture halls within hot-arid climates through modification of glazing systems with light-shelves: A parametric design approach

Qahtan,

Bahdad,

Al-Tamimi

et al. 2024

Indoor and Built Environment

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This study focused on enhancing the balance between sufficient daylighting and heat mitigation in lecture halls, set within the challenging hot-arid climate of Saudi Arabia, through the optimization of window designs and the incorporation of light-shelves. To achieve this, a combination of in-detail Parametric Sensitivity Analyses (PSA) was performed in the first stage to find the best configuration of windows, while a multi-objective optimization (MOO) strategy was applied in the second stage considering multiple objectives in each stage. Before running both analyses, the simulation model was validated by field measurement. The optimization results show that the optimal window configurations obtained through PSA and MOO offer significant potential for improving daylighting performance, energy efficiency and comfort. In terms of the overall best solutions from PSA and MOO, the PSA demonstrated substantial improvements, with Useful Daylight Illuminance (UDI) rising by 46.31% to 55.36%, glare decreasing by 52.17% to 82.61% and Energy Use Intensity (EUI) improving by 0.89% to 2.63%. Additionally, MOO solutions yielded even more significant enhancements, increasing UDI by 43.58% to 58.37%, reducing glare by 95% to 100% and enhancing EUI by 1.81% to 3.88%. This has resulted in a more evenly distributed and efficient daylighting throughout the space.

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Section: Methodsmentioning

confidence: 99%

Optimizing daylighting in lecture halls within hot-arid climates through modification of glazing systems with light-shelves: A parametric design approach

Qahtan,

Bahdad,

Al-Tamimi

et al. 2024

Indoor and Built Environment

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show abstract

“…The optimization cycle lasted 20 generations, with 50 people in each generation. According to previous studies, 57,58 the average population size for GA was between 30 and 200. The essential GA parameters in the Octopus plug-in were allocated based on the recommendations of prior research such as the population size, the number of generations and fitness value were appropriately adjusted as shown in Table 5, 43,51,59,60 and the specifics of the Radiance daylight parameters were also provided based on the majority of past daylight simulation studies.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, to facilitate the simulation process, the average of UDI was used as in previous studies. [55][56][57] Thus, the average of the values of UDI 300-2000lux was multiplied by (À1). The best solutions on the Pareto front were selected as optimum design solutions from a total of roughly 6125 design possibilities based on the set parameters of LSH in Table 3.…”

Section: Description Of the Case Study Model (Reference Case)mentioning

confidence: 99%

Balancing daylight in office spaces with respect to the indoor thermal environment through optimization of light shelves design parameters in the tropics

Bahdad

Fadzil

Onubi

et al. 2022

Indoor and Built Environment

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The study aims to investigate the preferred daylighting availability ranges for the best visual and thermal comfort in office workspace through optimal modifications light-shelve parameters, grounded on parametric design and optimization, with a focus on its visual and thermal indices. To identify the final optimal solutions, single and multi-optimization scenarios were used. The findings revealed that optimizing for a single objective might obstruct the attainment of other goals. In other words, the first scenario, optimization only for daylight availability, results in an increase in temperature. While optimizing for indoor thermal performance solely, none of the preset daylight availability acceptance requirements were met. However, multi-objective optimization solutions were the final optimal solutions nearest to the ideal. Final optimum solutions of the best design parameters of light shelves can improve the total average of daylight availability by 56.25%, 50.63%, 57.50% and 71.88%, and the indoor thermal performance was improved by decreasing the average temperature for thermal environmental performance indicators by 4.15%, 3.27%, 3.17% and 4.76%, respectively, in March, June, September and December. The study concludes that daylighting levels of 500 lux to1300 lux provide the best range of optimal daylighting for visual and thermal comfort indicators for office spaces in the tropics.

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“…For example, LEED V4.1 option 2 adopts the illuminance levels between 300 lux and 3000 lux. Lu et al [ 42 ] used the area-weighted average UDI to prove that the optimized curved facades can improve the daylight efficiency of office building, and Hong et al used UDI 300–3000 lux to evaluate the performance of thermos-chromic glazing window. They reported that UDI 300–3000lux for single- and double-glazed windows were 70.9% and 71.9%, respectively [ 43 ].…”

Section: Daylight Metricsmentioning

confidence: 99%

Simple mathematical models to link climate-based daylight metrics with daylight factor metrics and daylighting design implications

Li¹,

Li²,

Chen³

et al. 2023

Heliyon

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Investigation on the potential of improving daylight efficiency of office buildings by curved facade optimization

Cited by 16 publications

References 37 publications

Optimizing daylighting in lecture halls within hot-arid climates through modification of glazing systems with light-shelves: A parametric design approach

Optimizing daylighting in lecture halls within hot-arid climates through modification of glazing systems with light-shelves: A parametric design approach

Balancing daylight in office spaces with respect to the indoor thermal environment through optimization of light shelves design parameters in the tropics

Simple mathematical models to link climate-based daylight metrics with daylight factor metrics and daylighting design implications

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