• KEPCO Journal on Electric Power and Energy
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• 제5권3호
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• pp.157-163
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• 2019

현재까지 피크완화 및 에너지 절감을 위해 한국전력공사 120여개 사옥에 K-BEMS (KEPCO Building Energy Management System)가 운영 중이다. 이 시스템은 PV, PCS, BESS, EMS 등으로 구성되어 있으며 건물에너지 수요예측을 기반으로 BESS, PV 등을 활용하여 에너지 관리를 도모하고 있다. 이 시스템은 단기 과거데이터에 신경망기법을 단순 적용하여 수요를 예측함에 따라 예측 정확도가 높지 않고 운영자 수작업을 통한 BESS 충방전으로 피크 저감이 곤란하며 운영 경제성 제고가 어려운 실정이다. 이러한 문제를 해결하기 위해 전력연구원에서는 2016년부터 3년간 연구과제를 수행하였는데 이를 통해 에러를 최소화하며 높은 신뢰도를 가지는 실시간 수요예측기법과 이에 기반한 BESS충방전 최적화 자동화 기술 개발, 성능을 검증하였기에 이를 본 논문에서 소개하고자 한다.

• 한국실내디자인학회논문집
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• 제16권2호
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• pp.181-191
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• 2007

This study attempted to analyze the characteristics of interior design of the apartment units of Model-houses in terms of ecological aspects. 9 companies that possessed their model houses among the construction companies in Busan area as of August 2006 were selected. 20 units in the model houses of these companies were visited and analyzed. Through literature review, the guideline for the environmentally-friendly residential design was designed and developed to the checklists. The data collected were analyzed to find out the ecological characteristics of the interior space of apartment units. The findings are the followings. First, energy efficiency was properly considered in terms of natural lighting and natural ventilation. Second, in sustainability, the materials for floors and walls could not be reused even though they were environmentally-friendly. Water system needs more improvement for sustainable development including grey-water and rain recycling system. Third, interior greening should be applied more for better environment both physically and emotionally. It is expected that future housing will be more high-risen and densely-populated apartment spaces. Therefore, an approach to new ecological aspects including an emphasis on interior greening, use of eco-materials and adhesives, water recycling and flexibility of the spatial configuration should be made for the next generation.

• 센서학회지
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• 제29권5호
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• pp.312-322
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• 2020

As the use of mobile devices increase, there is public interest in the utilization of the human motion generated mechanical energy. The human motion generated mechanical energies vary depending on the body region, type of motion, etc., and an appropriate device has to be designed to utilize them effectively. In this work, a device based on the principles of triboelectric generation and inertia was assessed in order to utilize the multi-axial mechanical energies generated by human motions. To improve the output performance we confirm the changes in the output that vary with the structural design, the reasons for such changes, and variations in performance based on the parts of the human body. In addition, the level of electrical energy generated based on motion type was measured; a maximum voltage of 30 V and a current of 2 ㎂ were generated. Finally, the proposed device was utilized in LEDs used for lighting, thus demonstrating that multi-axial mechanical energies can be harvested effectively. Based on the results, we expect that the developed device can be utilized as a sensor to detect mechanical energies, to sense changes in motion, or as a generator for auxiliary power supply for mobile devices.

• 한국주거학회논문집
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• 제24권3호
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• pp.1-8
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• 2013

The University students learn their major or a general education in lecture rooms. In these days, lecturer use frequently various multimedia in lecture room. Appropriate control lighting environment in lecture room should be essential and related in efficient studying. Daylighting on front-side of lecture room will cause glare and students are hard to read contents on white-board at their seat. Therefore, in order to preventing glare we simulated daylighting of lecture room with using computer software in this study. Results from simulation and analysis as follows: The first, if students' left-side is east-oriented in lecture room, best daylighting condition about glare in lecture room. The second, architectural designers can use simulation data of daylighting or simulate data in designing university buildings with lecture rooms. Finally, if reducing size of windows (narrow and deep daylight: more closing vertically, from up to down daylighting: more closing horizontally) we will be able to reduce energy from lecture room.

• World Technopolis Review
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• 제3권2호
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• pp.89-96
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• 2014

Center for Research of Science and Technology ("PUSPIPTEK") has 460 hectares land area, still maintained as a green area with more than 30% green space. There are 47 centers for research and testing technology, technology-based industries, and as well as public supporting facilities in PUSPIPTEK area. Based on the concepts developed to make this area as an ecological region, PUSPIPTEK can be seen as a model of eco-innovation. The purpose of this research is to develop a model of water, energy and waste management with eco-innovation concept. As a new approach in addressing environmental degradation and maintaining the sustainability of ecosystem, studies related to eco-innovation policy that combines the management of water, energy and waste in the region has not been done. In order to achieve the objectives of the research, a series of techniques for collecting data on PUSPIPTEK existing conditions will be carried out, which includes utilities data (water, electricity, sewage) and master plan of this area. The savings over the implementation of the concept of eco-innovation in water, energy, and waste management were calculated and analyzed using quatitative methods. The amount of cost savings and feasibility were then calculated. Eco innovation in water management among other innovations include the provision of alternative sources of water, overflow of rain water and water environments utilization, and use of gravity to replace the pumping function. Eco-innovation in energy management innovations include the use of LED and solar cell for air conditioning. Eco-innovation in waste management includes methods of composting for organic waste management. The research results: (1) The savings that can be achieved with the implementation of eco innovation in the water management is Rp. 3,032,640 daily, or Rp.1,106,913,600 annually; (2) The savings derived from the implementation of eco innovation through replacement of central AC to AC LiBr Solar Powered will be saved Rp.1,933,992,990 annually and the use of LED lights in the Public street lighting PUSPIPTEK saved Rp.163,454,433 annually; (3) Application of eco innovation in waste management will be able to raise awareness of the environment by sorting organic, inorganic and plastic waste. Composting and plastic waste obtained from the sale revenue of Rp. 44,016,000 per year; (4) Overall, implementation of the eco-innovation system in PUSPIPTEK area can saves Rp. 3,248,377,023 per year, compared to the existing system; and (5)The savings are obtained with implementation of eco-innovation is considered as income. Analysis of the feasibility of the implementation of eco-innovation in water, energy, and waste management in PUSPIPTEK give NPV at a 15% discount factor in Rp. 3,895,228,761; 23.20% of IRR and 4.48 years of PBP. Thus the model of eco-innovation in the area PUSPIPTEK is feasible to implement.

• 정보과학회 논문지
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• 제44권4호
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• pp.417-422
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• 2017

비정상행위 탐지는 데이터로부터 특징을 추출하여 정상 행위 모델을 만들어, 이 정상 모델로부터 얼마나 벗어나 있는 가를 찾아내어 탐지하는 기법이다. 즉, 특정 기기가 생성하는 데이터를 기반으로 기기의 오류를 탐지하거나 사회망 데이터에서의 사용자 행위 변화를 찾아내어 비정상행위를 탐지하는 데 활용할 수 있다. 본 논문에서는 순위 상관 계수를 이용하여 건물 내의 기기의 비정상적인 데이터를 탐지하고자 한다. 에너지 절약 문제에 대한 관심이 높아짐에 따라 에너지를 효율적으로 사용하기 위해 여러방법들이 제안되었다. IT 기술의 발달과 더불어 공조 시스템(HVAC)이 건물에 도입되어 활용되고 있으며, 이 시스템을 통하여 에너지 소비의 문제점을 찾고 에너지를 효율적으로 관리할 수 있다. 따라서 본 논문은 공조 시스템에 속한 각 기기간의 순위 관계 변화를 관찰함으로써 이상 현상 탐지의 효율성을 높이는 방법을 제안하며, 사회망 데이터 내에서의 비정상행위 탐지 가능성도 함께 제안한다.

• 한국인터넷방송통신학회논문지
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• 제15권5호
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• pp.213-217
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• 2015

서울시에는 25개 구역의 구청이 있으며, 구청에는 최소 1곳에서 최대 4~5곳으로 소중대규모의 다양한 공연장을 운영하고 있다. 공연장의 용도는 연극이나 뮤지컬의 일반적인 공연에서 학예회, 발표장 등 다양한 용도로 사용되고 있다. 이 점을 착안하여 다양하게 사용되기에 용이한 LED등기구를 기존 할로겐 등기구로 대체 하였을 때 에너지 절감 부분에 대한 측면에서 어떤 이점이 있는 지를 알아보고, 실제 구민회관의 공연장을 대상으로 에너지 절감에 대한 수치로 적용하기로 한다. 기존 할로겐 등기구에서 LED등기구로 교체하였을 경우 약80%가량의 전력량 절감이 나타나며, LED자체의 소자 칩으로 다양한 기능적 특성을 가지는 장점을 지녀, 앞으로 할로겐 등기구를 대체하기에 용이한 LED 등기구라고 할 수 있을 것이다.

• 공업화학
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• 제26권3호
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• pp.247-250
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• 2015

유기 발광 다이오드(OLED)는 학문 및 산업 분야에서 많은 관심을 받아왔다. OLED는 기존에 사용되고 있는 광원들과는 달리 면 발광, 친환경적인 에너지 사용, 대면적, 초경량, 그리고 초박형 등의 차별화된 특징을 가지고 있기 때문에 최근 조명 시장에서 많은 관심을 받고 있다. 게다가, OLED 조명은 LED 형광등을 대체할 수 있는 차세대 조명으로써 주목되고 있다. 본 논문에서는 white OLED (WOLED)에 적용되고 있는 대표적인 인광 발광 재료들을 소개하며, 특히 yellow, orange, red 인광 물질들의 화학구조와 소자효율을 정리하였다. 이러한 선행연구의 물질들을 이해하고 인광 물질들을 체계적으로 분류함으로써 새로운 발광 재료를 연구하고 개발함에 있어서 많은 도움이 되리라고 생각한다.

• 보건의료생명과학 논문지
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• 제8권2호
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• pp.121-125
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• 2020

인원계수는 특정 시설의 혼잡도나 이용량을 파악하여 시설을 효율적으로 관리하거나 화장실 등 특정 장소의 출입인원을 파악하여 자동으로 절전기능을 구현함으로써 에너지 절약을 최대화하기 위한 용도로 늘 관심있는 방법이었다. 영상처리에 의한 인원계수 방법은 매우 비용이 비싸며 조명의 주위환경에 심하게 영향을 받는 단점이 있고 area sensor의 경우 인원이 팔짱을 끼고 근접하여 통과할 경우 1명의 인원으로 계수하는 단점이 있다. 비용이 비싸고 조명에 영향을 받거나 특정한 경우 인원계수가 부정확한 기존의 방법을 해결하기 위하여 본 논문에서는 라이다(LIADAR)의 원리를 이용한 새로운 인원계수 방법을 제안한다. 병원 출입인원을 정확하기 계수하는 것은 병원시설을 관리하는 데도 도움이 되겠지만 코로나19가 만연한 현시점에서 효율적인 방역대책을 세우는 데도 도움이 될 것이다.

• Asian-Australasian Journal of Animal Sciences
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• 제25권5호
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• pp.738-748
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• 2012

One of the main goals of small, medium and large farms is to improve the reproductive performance of rabbit does. Stocks of lower productivity can be improved by crossing with intensive breeds. A better nutritional status of both foetuses and suckling kits has a positive effect on their later productivity. Overfeeding young females before first mating can lead to conditions of fattiness. Using restricted feeding or higher fibre content in the feed and changing it for a higher level ad libitum feeding about one week prior to first mating leads to longer lifespan and higher productive level. Intensive reproductive rhythm creates a negative energy balance in does : they are unable to consume enough feed (energy) for the nutritional requirements of foetus and lactation, and therefore lose most of their fat reserves. Furthermore, primiparous does also expend energy because they are still growing. Under intensive conditions, the 42-d reproductive rhythm (re-mating 11 days after parturition) is recommended. Under extensive conditions, the 18 or 25-d mating interval with 35 to 42-d weaning could be suitable. On small farms, natural mating is favoured; on large farms AI is commonly employed. The main advantage of AI is the all-in, all-out system. Hormonal (PMSG) treatment is used with AI to increase receptivity on d 11. Frequent and high level PMSG use can lead to higher anti-PMSG antibody rates. Lower level (max. 20 IU) and less frequent PMSG injection or non-hormonal alternative methods (short dam-litter separation, changing nursing method or lighting programs) are recommended for this reason.