• KIEAE Journal
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• v.17 no.3
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• pp.5-13
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• 2017

Purpose: Various studies have been performed to address the issue of increased energy use by buildings. In particular, research on complex envelopes that combines diverse envelope element techniques is currently in progress in the building sector. The present study aimed to develop an awning system using a light shelf, and to verify its validity through performance evaluation. Method: In the present study, a testbed was established for the performance evaluation of the awning system using a light shelf, and the uniformity ratio and lighting energy consumption were compared and analyzed relative to those with no awning and light shelf installation (Case 1), awning installation (Case 2), and light shelf installation (Case 3). Result: 1) In the present study, an awning system using a light shelf (Case 4) where an opening is made on the awning screen and natural light can be introduced through the light shelf located at the bottom was developed. 2) The optimum standard for Case 4 obtained through the performance evaluation was a 0.6m lighting length and a 2m extension length at a light shelf angle of $30^{\circ}$. 3) Case 4 with the optimum standard had a 5.5% lower uniformity ratio than Case 2, but had a higher uniformity ratio than Case 1 and Case 3. 4) Case 4 with the optimum standard showed 13.3%, 44.6%, and 0%~8.7% lighting energy reductions compared to Case 1, Case 2, and Case 3, respectively. 5) Based on the above results, Case 4 suggested in the present study was found to be effective for indoor light environment improvement and lighting energy reduction.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2006.05a
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• pp.16-19
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• 2006

Due to its increased importance, outdoor lighting has been installed even for residental area. For the most part, more outdoor lightings are being installed for those houses designed to accommodate people since 2000. On this respect, quantitative analysis is conducted after finding the cases of outdoor lighting installed for residental area until nu. The cases of 24 residental areas we investigated to find the specific feature of outdoor lightings. This type of design analysis will serve as an attempt to set the stage for future studies.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.4
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• pp.18-29
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• 2015

The purposes of this research and development are as follows: first, to provide pleasant driving environments inside tunnels; second, to improve the current illumination environments lacking in diffusion luminance meters to meet tunnel lighting standards; and, third, to reduce the consumption of tunnel lighting energy accounting for approximately 65% of tunnel maintenance costs because of inadequate visual environments and tunnel operations. Further details are listed below. Firstly, an image luminance meter for tunnels that can implement the L20-method which is a tunnel luminance method that follows the international standards of CIE88, which was developed in order to improve and change the existing illumination-based tunnel lighting operation system to a luminance-based system. (The margin of error of below 5% according to the results of a test by an authorized agency and field test). Secondly, early illumination control is possible since the lighting control system that can be operated based on luminance enables interlocking control of the inside and outside of a tunnel using ethernet communication. Thirdly, guidelines for field application of the system are proposed. In addition, the luminance inducers of tunnels are found and the reflexibility of each facility that may reduce luminance of the boundaries is also proposed. Fourthly, as a result of a test bed, power consumption of luminance-based lighting operations decreased by 15.6% compared to illumination-based operations. Applying the feedback controls and maintenance factors of internal/external luminance meters, it reduced by 36.4%. Therefore, we became able to provide a luminance-based lighting operation system that complies with tunnel lighting design standards and provides a visual environment for drivers.

• Korean Institute of Interior Design Journal
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• v.23 no.3
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• pp.164-172
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• 2014

The purpose of this study is to identify current condition of night lighting plan for the outdoor space in an apartment complex and to examine how residents perceive that environment. For this purpose, considerations and standards for safe and agreeable night lighting environment were examined through literature study. And a field study to determine the current state of the night lighting environment was conducted, and finally a survey was executed to find out residents' satisfaction, requirements and consciousness on that lighting environment of apartment complex. Findings of this study can be summarized as follows. Firstly, most standards for night lighting environment focus on the urban environment as a whole, so they have very few clear standards exclusive for the outdoor space of the apartment complex. Secondly, most of outdoor spaces surveyed in this study have met the basic illumination standard, but some spaces had parts where lights were off or out of order forming dark zones, and in some parts lights were screened by trees causing shades, poor safety and a narrowed sight. Thirdly, residents had interest in the night lighting environment of the outdoor space, but they were not fully satisfied with that environment. Fourthly, residents were negative about such factors of the environment as safety, convenience, recognition and aesthetics. These factors should be reflected in planning and improving the night lighting. It is expected that this study provides basic information necessary to plan safer and more agreeable night lighting, and to satisfy the residents' need for liveable apartment complex.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.5
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• pp.8-15
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• 2010

Besides its basic function of illuminating a space, lighting can greatly affect the efficiency of a space when an advanced technology and planning, together with the effects of various presentations, are applied to lighting. A lighting plan suitable for maximizing the efficiency of a space will only be made feasible by considering the location of a space and the characteristics of the lamps to be used. In particular, the lighting plan for a space with a special function requires prior investigation and analysis of that space. In this study, the feasibility of a lighting environment for the tunnel of a radioactive waste disposal facility is investigated via a prior lighting design and simulation, which take into account the spatial characteristics of the tunnel. For this study, the use of fluorescent induction lamp is suggested, and the standards of lighting plan and structure are followed depending on the location of each segment of the tunnel. Then, a simulation analysis is conducted to investigate the feasibility of the plan.

• Korean Institute of Interior Design Journal
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• v.13 no.4
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• pp.118-126
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• 2004

This study started from the premise that the future elementary school should be designed based on ecological approach in order to restore the emotionality of children. This study aimed at providing a guideline for designing the interior of elementary schools based on ecological approach. Through literature review, the characteristics of ecological architecture and the regulations for green buildings were explored. Also 7 elementary schools which were evaluated as good school design through renowned books representing the ecological characteristics were chosen and analyzed. The results revealed that the school design included natural lighting by roof lighting, natural ventilation, greening, and use of natural materials. This study suggested three categories as a the guideline for the interior space of eco-school design; energy efficiency, greening and sustainability, which included natural lighting, natural ventilation, heating and cooling, planting, materials and water recycling.

• Korean Journal of Optics and Photonics
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• v.34 no.6
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• pp.276-282
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• 2023

In this paper, we designed a lighting optical system using a freeform lens as a substitute for expensive gobo lighting. Unlike gobo lighting, freeform lens lighting does not use an image mask, and it can form and project an image directly on the lens surface using only a single lens, thus reducing the cost compared to gobo lighting. In order to verify the performance of freeform lens lighting with these advantages, we conducted an illuminance simulation. As a result, it was confirmed that it can replace gobo lighting because it has an illuminance distribution similar to the image we want to irradiate and a light efficiency of 47% similar to the performance of gobo lighting.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.15 no.3
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• pp.10-17
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• 2001

We need to how about activity types, lighting conditions and physical features in a plate that is a object for the reasonable and economic lighting design. Thus, lighting designer analyzes spare features and completes lighting design by using luminaire that has a suitable luminous intensity distribution. There are special data in this study from analysing about activity types, lighting conditions and physical features of intelligent buildings that are getting an essential infrastructure in the information society. Intelligent building could be classified with office space, passing space, high ceiling space, one-side working space for the analysis. Also, four luminous intensity distributions and fluorescent fixtures, which are the mutt used luminaires in office building, are designed from the data of intelligent building.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.27 no.12
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• pp.16-27
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• 2013

This study describes the difference of lighting directing techniques of between asian and westerner in the residential space, and presents the LED lighting environment according to the residents' behaviors. This study was conducted with Koreans, European and North Americans, and the space range was limited to the living room where the various activities occur. The data of the desired LED lighting environment is drawn through lighting technique, illumination color temperature and illuminance variation of LED in living room, and the detailed study results are as follows ; First, the lighting in living space should be made with considering the various behaviors because the expected level according to consideration or not of behavior makes much difference. Second, the comfortably feeling LED lighting environments that are lighting technique, illumination color temperature and illuminance variation, are different between Koreans and North Americans, but Koreans and European feel comfortable under the similar LED lighting environments. Third, the data for the comfortable LED lighting environments is established according to the various residents' behaviors, which are watching TV, reading, studying, relaxing, chatting, entertaining guests. And then, the established LED lighting environments are analyzed with characteristic of behavior and classified according to lighting technique, illumination color temperature and illuminance variation for understanding their characteristic Few studies have been conducted to find out difference of the comfortably feeling LED lighting environment between asians and westerners. Therefore, in this study, it has a great significance to present the difference of the LED lighting environments that asians and westerners feel comfortable in living space, and to draw the characteristic of the expected lighting environment according to residents' behaviors.

• Korean Institute of Interior Design Journal
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• v.24 no.4
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• pp.43-50
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• 2015

In lighting design and lighting in the light of how the physical space rather than the amount of light metering is implemented in the same space as horizontal illuminance and luminance study of the spatial analysis as a basis for improving the quality of scientific and cognitive aspects analyzed the vertical component of the light. Vertical component of the light and the ability to interpret the information space can be secured more easily sense the brightness of a small area compared to the horizontal components of electrical energy, due to the contrast between the dark and the surrounding induce customers to public facilities or commercial space The pedestrian aids to facilitate the determination of the copper. In addition, to secure the brightness of the overall sense of space allows to have a sense of comfort to lower the tension of the space. The vertical component of light also has a deep relationship to improving the quality of light in electrical energy savings increase the accessibility of space, space, nightscape in the humanities also contribute to environmental and looking for one trillion people in the city in terms of cultural development and identity There.