• 한국수소및신에너지학회논문집
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• 제33권5호
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• pp.470-498
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• 2022

Recently, the world has been considering hydrogen energy as the primary energy transition means to achieve carbon neutrality by 2050. In order to achieve the goal of reducing greenhouse gas emissions, Korea is also promoting a clean hydrogen economy. However, it is necessary to introduce various clean hydrogen from overseas so that the projected demand can not meet the domestically produced. For this study, we conducted the policy comparison approach between countries other than the generally considered technical and economic approaches. The finding proposes the direction of bilateral cooperation for a strategy of securing overseas clean hydrogen from a geopolitical perspective. Germany was a target country for the policy comparison since it has a high proportion of manufacturing, like Korea, and is taking the lead in the renewable-based energy transition policy. According to the survey and analysis of the policy establishment status and new projects of the two countries, Germany is promoting bilateral international cooperation in the hydrogen area with about 33 countries based on 7 types of activities. In comparison, Korea is involved in bilateral cooperation with about 12 countries on relatively few activities. Among the types of bilateral cooperation, R&D cooperation with advanced countries for hydrogen technology was a common activity type. Germany preemptively promotes cooperation for demonstration and commercialization, considering geopolitical means and strengthening manpower training and assistance on policy and regulation to preoccupy the market for the future. Therefore, it is necessary to consider establishing a network of an entire life cycle of supply and demand network that links the future market with securing clean hydrogen considering the geopolitical distribution. To this end, Korea also needs to expand bilateral cooperation countries by activity type, and it seems necessary to seek various geopolitical-based bilateral cooperation and support measures for developing countries to diversify the supply sources of hydrogen.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1994년도 추계학술대회 논문집
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• pp.78-81
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• 1994

The Photovoltaics(PV) industry has been evolving over the last 30 years and expanding because of a rising demand for clean and safe energy. Crystalline silicon solar cells will have increased performance and reduced cost in the future. In this paper solution growth process used to fabricate polycrystalline silicon thin film is considered.

• 한국기후변화학회지
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• 제4권2호
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• pp.141-158
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• 2013

본 연구에서는 IPCC SRES 6개 기후변화 시나리오(A2, A1B, A1FI, A1T, B1, and B2)를 기반으로 우리나라의 현재(1996~2005년)와 미래(2046~2055년, 2091~2100년)에 대한 냉난방도일을 전망하였다. 이를 위하여 전구 기후모델(CCSM3)의 미래 전망 결과를 지역규모 기후모델(MM5)을 이용한 다운스케일링을 통해 고해상도(18km)의 기온 전망을 수행하였다. 21세기 말의 한반도 기온은 현재 대비 약 $1.2{\sim}3.4^{\circ}C$ 수준까지 증가하는 것으로 전망된다. 기온 전망 결과를 이용하여 7개 권역별(서울 경기, 강원 산간, 중부 내륙, 남부 내륙, 남부 해안, 영동 울릉, 제주) 냉난방도일을 전망한 결과, 21세기 말의 난방도일은 현재 대비 8~25% 수준까지 감소하는 반면에 냉방도일은 242~1,448%까지 증가하였다. 또한, 난방기간은 약 1개월 정도 감소하며, 냉방기간은 최대 2개월 이상 증가하는 것으로 나타났다. 따라서 현재에 비해 미래의 난방에너지 수요는 감소하지만, 냉방에너지 수요는 증가할 것으로 예측된다. 특히, 이러한 변화는 타 권역에 비해 강원산간권역과 제주권역에서 뚜렷하게 나타날 것으로 예측된다. 따라서 미래에는 난방을 위한 화석에너지보다 냉방에너지로 사용되는 전기에너지에 대한 수요관리가 현재보다 더욱 중요해질 수 있음을 의미한다.

• 한국가스학회지
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• 제27권3호
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• pp.11-18
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• 2023

본 연구에서는 최근 관심이 급격히 증대되고 있는 암모니아 연료에 대해 연소기술 중심의 기술 동향과 개발 방향에 대해 살펴보았다. 암모니아 연료의 필요성 및 수소 캐리어로서의 청정 암모니아 전주기 가치 사슬에 대해 소개하였으며, 암모니아 연소 특성에 대한 기초 개념과 화염 안정성 및 저NOx 연소기술 측면에서 암모니아 연소기술의 개발 방향을 제시하였다. 마지막으로는 암모니아 연소기술 동향에 대해 발전 및 산업 부문별로 그 특징을 살펴보고, 이에 관한 향후 연구 개발 방향을 도출하였다. 본 논문을 통해 암모니아 연료에 대한 기초적인 지식과 향후 개발 방향 및 의미에 대해 전달하고자 한다.

• 국제초고층학회논문집
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• 제12권2호
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• pp.169-177
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• 2023

The massive increase in elevator usage and a severe demand for energy efficiency have prompted manufacturers to develop various innovative technologies, including AC and gearless motors, machine-room-less (MRL) technologies, regenerative drives, elevator ropes, and LED lighting. In addition, manufacturers are providing software solution systems such as destination dispatching systems, people flow solutions, standby mode, and predictive maintenance applications. Future technologies include electromagnetic levitation, circulating multi-car elevator systems, robotization, and drones. This article outlines elevators' technological advancements. It discusses how to harness new technologies and apply them to aging, modern, and future buildings.

• 조명전기설비학회논문지
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• 제29권3호
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• pp.1-7
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• 2015

Korea's electricity supply and demand policy has focusing on electricity demand side management instead of the expanding supply and a lot of effort for LED(Light Emitting Diode) at the time. This paper calculated the optimal subsidy for LED spread. For this purpose, it analyzed the impact on spread of the lighting appliances each subsidy level from BDM(Bass Diffusion Model) and predicted the number of lighting appliances according to subsidy level in the future. The case study is calculated susidy for satisfaction of LED target using the suggested model in the future and verified availability.

• 전기학회논문지
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• 제65권12호
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• pp.1949-1957
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• 2016

Rapid Expansion of EVs(Electric Vehicles) is inevitable trends, to comply with eco-friendly energy paradigm according to Paris Agreement and to solve the environment problems such as global warming. In this paper, we analyze the limit point of transformer acceptable capacity as the increase of power demand considering EVs supply in the near future. Through the analysis of transformer utilization, we suggest methods to analyze the spare capacity of transformer for the case of optimal efficiency operation and emergency operation respectively. We have the results of 18.4~29% spare capacity for the charging infrastructure to the rated capacity of transformer by analyzing the existing sample apartments. It is analyzed that the acceptable number of EVs is 0.09~0.14 for optimal efficiency operation and 0.06~0.13 for emergency operation. Therefore, it is analyzed the power demand of EV will exceed the existing transformer spare capacity in 7~8 years as the annual growth rate of EVs is prospected 112.5% considering current annual growth rate of EVs and the government EV supply policy.

• 산업경영시스템학회지
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• 제29권1호
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• pp.47-55
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• 2006

This study is to provide information in the development of energy conservation technologies by means of technological demand survey covering energy market and industrial field among energy-related technologies. For this purpose, we check both the present state of energy technologies and trends of social change in Korea, and then combine social needs with major, bottleneck, and essential technologies required for the future. The range of this study covers the field of industry, kiln, furnace, metal, building, transport, and electricity. For case study, valid 120 companies among the 500 companies selected randomly in the energy data-base of Korea institute of energy research (KIER) are considered.

• 전기학회논문지
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• 제67권8호
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• pp.1019-1023
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• 2018

In this paper sensitivity analysis of temperature on special day electricity demand of land and Jeju Island is performed. The basic electricity demand per 3 hours is defined as electricity demand that reflects the GDP effect without the temperature influence. The temperature sensitivity per 3 hours is calculated through the relationship between special day electricity demand normalized to basic electricity demand and temperature. In the future, forecast error will be improved if the temperature sensitivity per 3 hours is applied to the special day load forecasting.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2012년도 전기공동학술대회 논문집
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• pp.155-156
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• 2012

In the modern age, as man's demand of energy is continuously grew, tidal becomes one of the sustainable energy sources that have been investigating thoroughly recently. Tidal turbine has proved high potential as a future power-generating device. To effectively capture tidal energy on site, a group of tidal turbines should be used and positioned in some formation with proper size and space so that energy can be absorbed from multiple point. Thus, the turbines together with the flow filed becomes a huge domain, a tidal farm. So, it becomes more convenient if a whole turbine farm is simulated by means of actuator discs since the time and cost for analysis can be reduced. This paper aims to evaluate the operating performance (power efficiency and energy restoration rate), mutual influence (for different longitudinal and lateral spaces), the influence of velocity profiles, turbulence intensity and the far wake characteristic of tidal turbines operating in farm formation. The results of this study help contributing to the present development of tidal turbine as the future potential energy conversion machinery.