• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 B
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• pp.1364-1367
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• 2005

In this paper, a novel prototype topology of soft switching PWM controlled high frequency AC power conversion circuit without DC voltage smoothing chemical capacitor filter link from the voltage grid of utility frequency AC power supply source with 60Hz-100V or 60Hz-200V is proposed and introduced for innovative consumer induction heating(IH) boiler applications as hot water producer, steamer and super heated vapor steamer.

• Journal of Electrical Engineering and Technology
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• 제11권2호
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• pp.470-479
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• 2016

The model based method for energy saving of the separately excited DC motor drive system is proposed in the paper. The accurate power loss model is necessary for this method. Therefore, the adaptive tabu search algorithm is applied to identify the parameters in the power loss model. The field current values for minimum power losses at any load torques and speeds are calculated by the proposed method. The rule based controller is used to control the field current and speed of the motor. The experimental results confirm that the model based method can successfully provide the energy saving for separately excited DC motor drive. The maximum value of the energy saving is 48.61% compared with the conventional drive method.

• 한국항해항만학회지
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• 제40권4호
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• pp.165-171
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• 2016

IMO에서는 선박온실가스 규제를 위해 2013년부터 현존선의 선박에너지효율관리계획인 SEEMP (Ship Energy Efficiency Management Plan)의 시행을 강제화하고 있다. SEEMP에서 권고하는 에너지절감기술 가이드라인은 크게 하드웨어적인 장비의 탑재 및 개조 또는 소프트웨어적인 기술을 통한 연료유 절감효과로 구분된다. 신조선의 경우 하드웨어적인 기술구현이 용이하지만 현존선의 경우 운항상 제약으로 인해 소프트웨어적인 에너지 절감기술 구현이 적용되고 있다. IT기반의 선박에너지절감 시스템 성능평가를 위해 해상시험을 수행하였고, 시스템 적용 전후의 항차데이터를 이용하여 연료유 절감효과를 비교 분석 하였다. 또한, SEEMP에서 자발적인 사용을 권고하고 있는 선박 경제운항 지표 (EEOI, Ship Energy Efficiency Operation Indicator) 분석을 통한 성능평가 결과를 제시하였다.

• 대한조선학회논문집
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• 제52권6호
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• pp.419-427
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• 2015

Recently Energy Saving Device has been developed actively due to the regulation of the EEDI. This Energy Saving Device which is newly developed is integrated duct and stator. This paper verified performance of the Energy Saving Device through CFD. The experimentation to find the best pitch angle of each blade of the stator designed has been conducted. The angle of incidence of the duct has been obtained through the measurement of the wake. The experimentation has been carried out with and without Energy Saving Device. The efficiency increase was through these two experiments.

• 조명전기설비학회논문지
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• 제24권9호
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• pp.85-96
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• 2010

The recent environmental protection trend requires more strict energy saving, therefore every transportation system should reduce energy consumption to the minimum value. High-efficiency operation system, energy saving and $CO_2$ emissions shall be addressed as important issues in railway system. These issues are the most essential factors of railway, compared to major public transportation system. Recently, saving energy in the electric railway system has been studied. The efficient use of regenerated energy is considered to save energy. Namely, Using regenerative energy is that to store the energy generated during braking and discharge it again when a vehicle accelerates. Reusing energy stores and discharges energy, consequently enables a complete exchange of energy between vehicles, even if they are not braking and accelerating at precisely the same time, as is most frequently the case in everyday service. This paper analyzes effects of energy saving and $CO_2$-cut by using regenerative energy of electric vehicles.

• 방송공학회논문지
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• 제23권6호
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• pp.836-854
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• 2018

본 논문은 한국인의 에너지 절약의식이 TV 등 에너지관련 방송매체의 매개효과를 통해 에너지 절약행동에 미치는 영향을 분석하였다. 각 변수에 대한 구조화된 설문조사를 기반으로 Hayes(2013)의 PROCESS Macro를 이용한 회귀분석을 실시하였다. 분석의 결과 에너지 절약의식이 높은 사람일수록 에너지 절약행동을 많이 하고 있으며, 특히 에너지관련 방송미디어에 노출될수록 에너지 절약행동을 활발하게 하는 것으로 나타났다. 방송매체별 효과를 분석한 결과 에너지 공익광고 및 캠페인을 통한 효과가 15.3%로 가장 컸으며, 다음으로 에너지 뉴스를 통한 효과가 12.1%로 분석되었다. 이에 비해 에너지 다큐멘터리는 에너지 절약행동에 영향을 미치지 못한 것으로 나타났다. 이에 따라 에너지 절약행동을 활성화하기 위해서는 에너지관련 방송의 빈도를 높이면서, 에너지 절약행동을 유도할 수 있는 에너지 다큐멘터리를 강화하는 방송정책의 수립이 필요하다. 또한 향후 에너지 절약행동에 의한 실제 절약정도를 나타내는 전력사용 영수증이나 유류비 사용액 등 실증자료를 통해 분석의 신뢰도를 높이는 노력이 필요하다.

• 설비공학논문집
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• 제28권3호
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• pp.115-122
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• 2016

In this study, 21 energy reduction factors were selected as architecture, system & operation, and lighting and equipment parts to analyze reduction method of the load occurring in office buildings. Energy consumption simulation was performed. In the architecture part, saving rate (1.53%) of "occupant density" factor was the most efficient. In the system and operation part, saving rate (1.28%) of "interior VAV and exterior FPU type" factor was the most efficient. In case of lighting and equipment part, saving rate (12.42%) of "schedule" factor was the most efficient. In the three parts, saving rate of the lighting and equipment part was 27.32%. This was caused by the "schedule" factor. Saving rates of the architecture part and the system and operation part were 3.39% and 1.20%, respectively.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2011년도 추계학술발표대회 논문집
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• pp.338-341
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• 2011

Water usage for cleaning the toilet bowl accounts for 27% of the total water usage. Water-saving valve that can select the amount of water for cleaning toilet bowl can be reduced expenditure. After installing water-saving valve, analysed the economic effects. Water-saving valves compared with flush valves, and researched the amount of water usage. Then analyzed fort he economic effects. Water-saving valve was used 5.6 ${\ell}/time$ for cleaning toilet bowl. In contrast, flush valve was consumed 8.4 ${\ell}/time$. Water-saving valve's water-saving rate was 33.3%. The initial payback period for Water-saving valve was 459.5 days. By a small investment in water saving valve, the economic benefits can be obtained.

• 전자공학회논문지
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• 제53권1호
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• pp.9-21
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• 2016

IP 네트워크에서 에너지 소모를 줄이기 위해 다양한 방법이 연구 되어 왔다. 본 논문에서는 다양한 에너지 프로파일을 갖는 IP 네트워크에서 2단계 라우팅 방식을 제시하고, 그 특성을 분석한다. 단계1의 라우팅 방식에서는 에너지 절약을 위해 기존 코스트 외에 에너지 코스트를 고려한 OSPF 라우팅이고, 단계2에서는 가능한 많은 코아 노드를 sleep 상태로 만든 후, sleep 노드로 영향을 받는 경로만 재 라우팅 하는 방식을 적용한다. 이때 단계2에서 에너지 절약 특성과 네트워크 레벨의 QoS 보장을 위한 방법으로, 재 라우팅 시 허용 가능한 증가 홉 수와 링크 및 노드의 이용률을 제한함으로써 에너지 효율 개선 및 네트워크 레벨의 지연 특성을 동시에 만족시킬 수 있다는 것을 확인한다. 또 sleep 모드로 둘 코아 노드를 선정하는 방법에 따라 에너지 절약 효율 및 지연 특성이 다르며, MP (minimum_path)에 기초하여 sleep 상태로 만들 코아 노드를 선정하는 방식이 우수함을 나타낸다.

• 한국지열·수열에너지학회논문집
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• 제13권2호
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• pp.16-21
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• 2017

In this study, the flow effect of warming and cooling in the air supply of a pit for air conditioning were evaluated in BS art museum. We simulated the flow temperature for a pit winter and summer seasons using computational fluid dynamics. Consequential, energy saving, energy saving costs and initial payback periods were calculated and the following conclusions were drawn. The warming effect of the winter increased by $18.1^{\circ}C$ and $0.2^{\circ}C/m$ and the cooling effect of the summer decreased by $6.1^{\circ}C$ and dropped to $0.07^{\circ}C/m$. Energy saving appeared to be 19.1 kW in the summer and 54.3 kW in winter. Energy saving costs ranged from 2,567,119 won/year to 5,134,238 won/year and at minimum, initial payback period for initial investment was 3.9 years. As a result, the air supply system using an existing pit without any burden on initial investment costs is believed to contribute to energy saving through warming and cooling of unutilized energy effects.