A study on the application of solar modules to light shelves to improve generation and daylighting efficiency

Baek, Songi; Lee, Heangwoo

doi:10.1016/j.enbuild.2022.111976

Cited by 9 publications

(7 citation statements)

References 35 publications

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“…According to our previous studies, the machine‐learning models constructed were quantified by evaluation metrics (e.g., root mean square error (RMSE), [ 52 ] mean absolute error (MAE), and coefficient of determination ( R 2 )). [ 53,54 ]…”

Section: Methodsmentioning

confidence: 99%

Frontier Molecular Orbital Offset as an Empirical Descriptor for Predicting Short Circuit Current of Nonfullerene Organic Solar Cells

Lee

2023

Solar RRL

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An efficient computational approach, in contrast to the trial‐and‐error experiment process, for predicting, characterizing, and optimizing the macroscopic performance parameters (e.g., short‐circuit current density (Jsc)) of nonfullerene acceptors‐based organic solar cells (OSCs) remains a rarely addressed and complicated challenge. In this work, a data‐driven approach is used to predict the electrical performance of nonfullerene OSCs and reveal their charge transfer behaviors. The eXtreme Gradient Boosting (XGBoost) model within empirical descriptors is used to understand the governing feature for enhancement of Jsc, which is vital for the design and discovery of new donor/nonfullerene acceptor photoactive layers for photovoltaic applications. Through the well‐trained XGBoost model and SHapley Additive exPlanations theory, the descriptors impacting the Jsc of nonfullerene OSCs are further explained and analyzed. Remarkably, the XGBoost model combines four empirical descriptors to achieve an impressive prediction accuracy (R2 > 0.8). The results from data‐driven approaches prove that the lowest unoccupied molecular orbital (LUMO) offset (between donor and acceptor) plays the most significant role in increasing the Jsc values of nonfullerene OSCs. Moreover, this study highlights the effect of LUMO offset on the photoinduced charge transfer process of donor/non‐fullerene acceptor blends, which might pave the way toward rapid and precise energy‐level tuning of efficient OSC materials.

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Section: Methodsmentioning

confidence: 99%

Frontier Molecular Orbital Offset as an Empirical Descriptor for Predicting Short Circuit Current of Nonfullerene Organic Solar Cells

Lee

2023

Solar RRL

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“…There are three types of SD used for this experiment which are overhang, light shelf, and blinds (Figure 2). These SD are chosen as they are the most widely used SD according to previous study [12,13,14]. The material and reflectance of the interior wall, ceiling, floor, LP, and the shading devices surfaces in the room are shown in Table 1, where the values are accordance to Illuminating Engineering Society standard [18].…”

Section: Methodology 21 Scaled Model Experiments Setupmentioning

confidence: 99%

“…Hence, there is a need for the inclusion of shading device (SD) to achieve a good daylight utilisation in the room where the presence of SD alone leaves the deep interior being too dark under illuminated. Furthermore, studies which use Integrated Environmental Solutions: Virtual Environment (IESVE) as their software also focus on LP and SD separately [3,12,13,14,15,17]. Hence, study on the integration of horizontal LP with SD is essential to provide a uniform distribution of daylight in a deep plan office layout.…”

Section: Introductionmentioning

confidence: 99%

Daylight Performance of Integrated Horizontal Light Pipe with Shading Devices (Validation) for High-Rise Building in Tropical Climate

Christopher Heng Yii Sern,

Louis Ting Kwang Liou,

Boon Jia Jun

et al. 2023

ARASET

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Daylight is known to bring benefits to human in terms of productivity, psychology, and physiology. The emergence of deep plan layout in high-rise hinders the utilisation of the abundance daylight available in tropical climate. This brings challenges to ensure a uniform distribution in the interior room. This study focuses on the software validation of the integration of a horizontal light pipe (LP) and shading devices (SD) to illuminate the deep plan where the former provides daylight in the deepest portion of the room while the latter helps to shade the excessive daylight at the window opening. The shading devices that have been chosen are overhang, light shelf, and blinds. The computer simulation, Integrated Environment Solution: Virtual Environment (IESVE), is being validated with physical model experiment with a scale of 1:10. The experiment was conducted in an open carpark in Universiti Sains Malaysia, Penang, Malaysia from 9am to 3pm for two days. The validation was done using graph comparison, Pearson Correlation, relative root mean square error (RRMSE), and relative mean bias error (RMBE). The results shows that the daylight ratio (DR) from the software has positive relationship with the experiment data. Hence, the software can be used to further simulate various integration of LP and SD.

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“…Light-shelves have straightforward designs but good daylighting performance. 13 Light-shelves are the most widely used shading device in modern buildings and one of the greatest multiple-daylight management strategies for increasing daylight uniformity and space lighting quality. The main goal of light-shelf design is to improve visual comfort by increasing the illuminance and uniformity offered by adequate shading.…”

Section: Introductionmentioning

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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A study on the application of solar modules to light shelves to improve generation and daylighting efficiency

Cited by 9 publications

References 35 publications

Frontier Molecular Orbital Offset as an Empirical Descriptor for Predicting Short Circuit Current of Nonfullerene Organic Solar Cells

Frontier Molecular Orbital Offset as an Empirical Descriptor for Predicting Short Circuit Current of Nonfullerene Organic Solar Cells

Daylight Performance of Integrated Horizontal Light Pipe with Shading Devices (Validation) for High-Rise Building in Tropical Climate

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

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