According to a survey conducted by KEITI in 2016, building energy consumption is estimated to account for nearly 20 % of total energy consumption and will grow by an estimated 1.4 % per year by 2040. As a result, interest in energy consumption in the ...
According to a survey conducted by KEITI in 2016, building energy consumption is estimated to account for nearly 20 % of total energy consumption and will grow by an estimated 1.4 % per year by 2040. As a result, interest in energy consumption in the building sector is expected to increase. In particular, lighting energy use in the building sector is high at 20 % of the overall energy use in the building sector, so various studies and technology developments are underway to address this. Also, as the demand for improvement in the quality of life grows, so does the demand for technologies that simultaneously demand comfort in indoor spaces. As part of these studies, the development of composite cladding that combines the component technologies of the cladding is increasing not only the reduction of building energy but also the maximum comfort of interior spaces. One of the surface factor technologies is the awning, the concept of an insolation membrane, installed in the main entrance or window of a building to regulate light and provide a direct glare prevention system from the outside. However, the installation of awning reduces the amount of natural light entering the room, which can cause problems with an increase in lighting energy. In contrast, the light-shelf, one of the natural lighting systems, is a system that directs exterior natural light into the interior through reflection, benefiting from the reduction of daytime lighting energy. In this regard, it can be predicted that an appropriate combination of lighting and light-shelf would lead to a reduction in lighting energy as well as to the improvement of the indoor lighting environment of the existing awning systems. This study proposes an the awning system using light shelf and is validated by conducting a performance assessment on the basis of testbed on the reduction of light energy and the comfort of the interior lighting environment. Testbed was established to assess the performance of the awning system using light shelf, to perform performance assessment of the awning system using light-shelf (Case 4), the assessment it was not installed (Case 1), and the awning was installed (Case 2), and the light-shelf was used (Case 3). The following is the results of this study. First, this study proposed an all-in-one type of the awning system using light shelf, which cut a hole in the insulation of awning, to enable the light shading to be achieved with a simultaneous light shield to reach the light-shelf at the base. Second, the optimal specification of an the awning system using light shelf and improvement in room balance is 30 ° for a light-length beam with an illuminating length of 2 m and an angle of 0.6 m. Third, the awning system using light-shelf (Case 4) shows 5.5 % less balanced compared to awning system (Case 2). However, it is effectively analyzed as the degree of balance improvement is possible compared to not installed (Case 1) and light-shelf system (Case 3). Fourth, the light energy usage of the awning system using light-shelf (Case 4) is effectively analyzed as it can be reduced by 13.3 %, 44.6 % and 0-8.7 %, respectively, compared with not installed (Case 1), awning system (Case 2) and light-shelf system (Case 3). Fifth, the awning system using light-shelf (case 4) proposed in this study when combined with the above contents is analyzed effectively to enable both the benefits of light-shelf, the reduction of the light energy and the improvement of the light environment, the benefits of awning system.
This study is effectively analyzed to have suggested a new concept of composite skin by combining the cladding element technologies Light-shelf system and Awning system, and to verify its effectiveness by performing performance assessment accordingly. However, it is understood that the research has been conducted only to assess the performance of the artificial environment, and that it has been conducted only to the extent that it has been performed to the extent that it is limited to the extent to which it is improved. Further work on detailed control of the awning system using light-shelf will have to be followed by further study.