A Study of Optimal Specifications for Light Shelves with Photovoltaic Modules to Improve Indoor Comfort and Save Building Energy.
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TLDR
In this paper, a full-scale testbed was built to evaluate performance according to light shelf variables and the uniformity ratio was found to improve according to the light shelf angle value and decreased as the PV module installation area increased.Abstract:
Recent studies on light shelves found that building energy efficiency could be maximized by applying photovoltaic (PV) modules to light shelf reflectors. Although PV modules generate a substantial amount of heat and change the consumption of indoor heating and cooling energy, performance evaluations carried out thus far have not considered these factors. This study validated the effectiveness of PV module light shelves and determined optimal specifications while considering heating and cooling energy savings. A full-scale testbed was built to evaluate performance according to light shelf variables. The uniformity ratio was found to improve according to the light shelf angle value and decreased as the PV module installation area increased. It was determined that PV modules should be considered in the design of light shelves as their daylighting and concentration efficiency change according to their angles. PV modules installed on light shelves were also found to change the indoor cooling and heating environment; the degree of such change increased as the area of the PV module increased. Lastly, light shelf specifications for reducing building energy, including heating and cooling energy, were not found to apply to PV modules since PV modules on light shelf reflectors increase building energy consumption.read more
Citations
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Multi-Disciplinary Analysis of Light Shelves Application within a Student Dormitory Refurbishment
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TL;DR: A new methodological approach is presented in order to investigate the technology under different fields of interest: daylight, lighting energy, cooling and heating needs, and thermo-hygrometric comfort.
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References
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Ganga A. Warrier,Benny Raphael +1 more
TL;DR: In this paper, the authors evaluate the potential of light shelves to improve daylighting and visual comfort and find that a horizontal light shelf is able to increase the illuminance in the interior by an average of 21% by rotating the external light shelf to an optimal angle.
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TL;DR: In this paper, the thermal performance of an optimally tilted semi-transparent BIPV panel, which is fixed as a roof system on a two-storied single room sample building, was evaluated.
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TL;DR: In this paper, the authors developed an awning system with a built-in light shelf, which is a new type of system combining an anawning and a light shelf.
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Performance evaluation of a light shelf with a solar module based on the solar module attachment area
TL;DR: In this paper, the authors proposed a light shelf with a solar module covering only part of the light shelf so that lighting and generation are carried out at the same time, and verified its effectiveness by conducting a performance evaluation.