A preliminary study on the performance of an awning system with a built-in light shelf

Lee, Heangwoo; Jang, Hyang-In; Seo, Janghoo

doi:10.1016/j.buildenv.2018.01.016

“…This study proposes a dimming lighting control system using general lighting and occupant location-awareness technology, and conducted a performance evaluation for lighting energy reduction and light environment improvement using a full-scale test bed. For this purpose, the performance evaluation method of this study was set as follows based on related studies [45,46].…”

Section: Performance Evaluation Methodsmentioning

confidence: 99%

Development of a Dimming Lighting Control System Using General Illumination and Location-Awareness Technology

Lee

¹

,

Choi

²

,

Sung

³

2018

Self Cite

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As part of ongoing research into saving lighting energy, studies on lighting control integrating location-awareness technologies have recently been increasing, but these have led to the indoor illuminance imbalance problem by controlling only the lighting adjacent to the occupant. Therefore, the purpose of this study is to develop a dimming lighting control system using general illumination and location-awareness technology by integrating general illumination and dimming technology with lighting control technology that is based on location-recognition, and to verify the effectiveness of this system. This study built a full-scale test bed to evaluate the performance of the developed technology, and derived the energy reduction rate and indoor light environment improvement rate to evaluate the performance of dimming lighting control (Case 1), dimming lighting control using location-awareness technology (Case 2), and dimming lighting control using general illumination and location-awareness technology (Case 3). The conclusions are as follows. (1) Case 3 reduces lighting energy by 47.9–64.2% as compared to Case 1, and Case 3 reduces lighting energy compared to Case 2 when there are three occupants. (2) Case 3 improves indoor light environment comfort by increasing the uniformity by 17.8–49% compared to Case 2. These results confirm the effectiveness of Case 3 proposed in this study.

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“…Based on these standards, the performance evaluation in this study was conducted for maintaining the summer and winter indoor temperature standards of 26 • C and 20 • C, respectively. The appropriate indoor illumination standard was determined as 500 lx [35]. The reasons for selecting this indoor illumination standard for the performance evaluation in this study were the following.…”

Section: Appropriate Indoor Temperature and Illumination Standards Fomentioning

confidence: 99%

“…Further, high energy consumption is related to the poor insulation of building skins, especially that of windows. Various studies have been conducted to investigate potential approaches for improving the thermal performance of windows, including the use of double skins [6][7][8][9][10][11][12][13][14][15], phase change materials (PCM) [16][17][18][19][20][21][22], window blinds [23][24][25][26][27][28][29][30][31][32], awnings [33][34][35], and light shelves [36][37][38][39][40][41]. Although several of these apparatuses may be efficiently used to reduce the energy consumption of the buildings, they often have high installation costs or are difficult to be 2 of 14 applied to the existing buildings.…”

Section: Introductionmentioning

confidence: 99%

Development of Window-Mounted Air Cap Roller Module

Lee

¹

,

Seo

²

2018

Self Cite

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While previous research has shown the use of attachable air-caps on windows to efficiently reduce a building’s energy consumption, the air-caps considered had to be attached to the entire window’s surface, thus limiting the occupants’ view and creating the inconvenience of needing to detach and attach the air-caps. In this study, a window-mounted air-cap roller module using Velcro tape that may be easily attached, detached, and rolled up or down was developed and performance tested in a full-scale test bed. It was found that as the area of the air-caps attached on a window increased, the required indoor lighting energy increased. However, the window insulation improved, thus reducing the cooling and heating energy needed. Attaching the air-caps to the entire window surface effectively reduced the building’s energy consumption, but views through the window may be disturbed. Thus, the developed window-mounted air-caps enable an occupant to reduce the building energy consumption and maintain their view according to their need. The findings of this study may contribute to a reduction in building energy consumption without sacrificing a pleasant indoor environment. Further studies may be needed to verify their efficacy under varying indoor and outdoor conditions.

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“…Based on these standards, the performance evaluation in this study was conducted for maintaining the summer and winter indoor temperature standards of 26°C and 20°C, respectively. The appropriate indoor illumination standard was determined as 500 lx [32]. The reasons for selecting this indoor illumination standard for the performance evaluation in this study were the following.…”

Section: Appropriate Indoor Temperature and Illumination Standards Fomentioning

confidence: 99%

“…Further, high energy consumption is related to the poor insulation of building skins, especially that of windows. Various studies have been conducted to investigate potential approaches for improving the thermal performance of windows, including the use of double skins [3][4][5][6][7][8][9][10][11][12], phase change materials (PCM) [13][14][15][16][17][18][19], window blinds [20][21][22][23][24][25][26][27][28][29], awnings [30][31][32], and light shelves [33][34][35][36][37][38]. Although several of these apparatuses may be efficiently used to reduce the energy consumption of the buildings, they often have high installation costs or are difficult to be applied to the existing buildings.…”

Section: Introductionmentioning

confidence: 99%

Development of Window-Mounted Air Cap Roller Module

Lee¹,

Seo²

2018

Preprint

Self Cite

0

View full text Add to dashboard Cite

While previous research has shown the use of attachable air-caps on windows to efficiently reduce a building’s energy consumption, the air-caps considered had to be attached to the entire window’s surface, thus limiting the occupants’ view and creating the inconvenience of needing to detach and attach the air-caps. In this study, a window-mounted air-cap roller module using Velcro tape that may be easily attached, detached, and rolled up or down was developed and performance tested in a full-scale test bed. It was found that as the area of the air-caps attached on a window increased, the required indoor lighting energy increased. However, the window insulation improved, thus reducing the cooling and heating energy needed. Attaching the air-caps to the entire window surface effectively reduced the building’s energy consumption, but views through the window may be disturbed. Thus, the developed window-mounted air-caps enable an occupant to reduce the building energy consumption and maintain their view according to their need. The findings of this study may contribute to a reduction in building energy consumption without sacrificing a pleasant indoor environment. Further studies may be needed to verify their efficacy under varying indoor and outdoor conditions.

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A preliminary study on the performance of an awning system with a built-in light shelf

Cited by 26 publications

References 7 publications

Development of a Dimming Lighting Control System Using General Illumination and Location-Awareness Technology

Development of a Dimming Lighting Control System Using General Illumination and Location-Awareness Technology

Development of Window-Mounted Air Cap Roller Module

Development of Window-Mounted Air Cap Roller Module

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