• Proceedings of the Korean Information Science Society Conference
• /
• 2012.06d
• /
• pp.378-380
• /
• 2012

본 논문은 사용하지 않는 공간에서 낭비되는 전기 에너지량을 감소시키기 위한 사용자 위치기반의 대기전력 제어시스템을 설계 및 구현한다. 사용자의 위치파악을 위해 주거시설의 해당 영역을 3개의 구역으로 분리하고 각 구역에 2개의 PIR센서를 설치하여 입 출입 현황 및 재실인원을 점검하며, 재실여부와 가전제품의 대기모드 여부에 따라 ZigBee 무선통신을 이용해 전력센서를 차단 혹은 해제한다. 또한, 시스템을 검증하기 위해 전력센서로 수집한 전력량을 대기전력의 차단과 해제로 비교하여 에너지 절감률을 분석한다.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.41 no.10
• /
• pp.1233-1235
• /
• 2016

It is desirable to place virtual machines for minimizing the number of operational servers in order to save energy in high-density cloud computing environment. However, the compacted servers can incur heat islands. This paper firstly finds out the relationship between the server utilization by the virtual machine placement and the energy consumption of servers and heat from servers. Then, this paper proposes a virtual machine placement algorithm to save energy consumed and avoid heat islands.

• Journal of Korea Foundry Society
• /
• v.41 no.4
• /
• pp.342-348
• /
• 2021

Almost all ferrous foundries use press scrap as the main charge material. In this study, we tried to reduce the melting energy by optimizing the shape and size of press scrap. The experiment was conducted using 3t/h medium frequency induction melting furnaces at two foundries. In the case of the improved condition, customized press scrap was used for initial charging, and small press scrap was used for additional charging. The energy reduction effect of the improved condition was enhanced by reinforcing the cleaning process of the return scrap surface. The reduction ratios of the melting energy basic unit by the improved condition at the two foundries were almost the same (23.3 and 23.9%). The improved condition was very effective in both foundries with different basic unit levels. The reasons for energy reduction and the economic effects of the improved condition were described.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.11 no.12
• /
• pp.1231-1236
• /
• 2016

Paris Agreement signed in January 2015 is a new rule that will replace the existing Kyoto Protocol. The new agreement needs new demands and challenges to minimize carbon emissions. Especially, even though agricultural sector occupies only 1.8% in the national energy consumption, the portion of the energy being occupied in agricultural production costs very high. Although renewable energy and energy-saving facilities is being developed and disseminated for replacing fossil fuel energy and saving energy, the installation-rate is not enough high. Thus, this paper developed Korean-style smart farm system, and carried out the experiment to show the performance of energy savings through analyzing proper environment in domestic situation.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2016.04a
• /
• pp.956-958
• /
• 2016

비절전 가전기기는 제품수명을 고려할 때 전력을 소비하는 가정 내 가전기기의 대부분을 차지하지만 에너지 효율 정책의 사각지대에 있다. 본 논문에서는 비절전 가전기기의 에너지 절감을 위해 전력 총량에서 각 가전기기의 상태를 식별하는 NIALM의 기기 식별률을 복합센서를 활용해 개선하는 기술에 대해서 소개하고자 한다.

• 월간 기계설비
• /
• s.268
• /
• pp.63-63
• /
• 2012

국토해양부는 현행 20%인 신축 공동주택의 에너지 의무절감률을 30%로 상향 조정하는 내용을 골자로 하는 '친환경 주택의 건설기준 및 성능' 고시를 일부 개정해 11월 1일부터 시행에 들어간다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2012.04a
• /
• pp.540-543
• /
• 2012

최근에 녹색 IT의 일환으로 IT 장비에서 소비하는 에너지 크기를 감소시킴으로써 발생하는 탄소발생률을 줄이고, 장비 운용 비용을 낮추는 연구가 각광을 받고 있다. 그에 따라 본 논문에서는 차세대 통신망의 강력한 후보로 예상되는 광 버스트 스위칭 망에서 에너지 절감 기법 중 하나인 저 전력대기 방식을 사용할 때 발생하는 에너지 소비량에 대한 수식 모델을 제안한다. 제안된 수식 모델에서는 입력되는 트래픽 패턴을 고려하여 가져갈 수 있는 상태천이확률을 구하고 이에 따른 에너지 소비량을 예측해 볼 수 있다.

• Environmental and Resource Economics Review
• /
• v.24 no.3
• /
• pp.463-488
• /
• 2015

A more detailed design of offset system is needed according to the emission trading system started in 2015. This study aims to estimate the supply of potential offset that can be secured by expanding high-efficiency household electric appliances. The target commodities for analysis are three different householding electric appliances: TV, washing machine, electric fan, refrigerator and air conditioner. By using the ARDL model, we estimated the coefficients of diffusion of these high-efficiency appliances from 2016 to 2022. Then, the potential supply of offset was drawn by calculating the amount of electricity saving by efficiency improvement and by applying the rates of carbon exchange. Supposing that the electricity savings rates of high-efficiency appliances are each 10% and 20%, the accumulated carbon decrement in 2022 was respectively $361,899CO_2t$ and $723,797CO_2t$. The appliance that showed the biggest carbon decrement was air conditioner, and the second biggest was refrigerator and the next was TV, followed by washing machine, electric fan.

• Proceedings of the KIEE Conference
• /
• 2011.07a
• /
• pp.1366-1367
• /
• 2011

저탄소 녹생성장의 국가정책에 부응하고 친환경 하수처리장 운영관리 및 에너지 자립률 향상을 위해 신재생에너지 설비 사용과 고효율 전기설비를 적용하여 안정적 하수처리장 운영을 하고자 함.

• Journal of Korean Society of Transportation
• /
• v.28 no.4
• /
• pp.97-106
• /
• 2010

Environmental issues resulting from climate change and energy crises have become global issues, and cycling has gained greater popularity for sustainable transportation. Though many cities are trying to build bicycle roads, it is not easy to implement bicycle roads because there is little available space for bicycle facilities. Therefore, road diets have become more popular in Korea. However, there has been no intensive research to date of their impacts. The purpose of this research is to evaluate the effects of road diets and construction of bike lanes. Every benefit, including energy benefit, environmental benefit, and health benefit is considered, while only time savings benefit has been considered in previous studies. The benefit analysis for the Seoul metropolitan area as a case study shows that road diets have a (1) time saving benefit for only five percent of the mode share and (2) enough total benefit even if bicycle mode share is less than two percent.