• Current Photovoltaic Research
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• 제1권1호
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• pp.1-10
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• 2013

The photovoltaic (PV) industry, which occupies about 80% share of domestic new and renewable energy (NRE) sales, has played an important role in the development of the Korean NRE industry. This was made possible by the government's implementation of the 3rd Basic New and Renewable Energy Plan, which promoted strategic PV R&D, infrastructure building, and a variety of PV deployment programs. For instance, 'One Million Green Homes', 'Feed in Tariff', and 'Renewable Portfolio Standards' programs contributed greatly to the dissemination of PV systems in the country. Furthermore, these programs were supported with more than 380 billion Won over 6 year period (2007~2012). The strategic PV R&D contributed to the fast follow-up in commercial technologies. Because of the recent, sharp decline in PV prices caused by oversupply and economic crisis in European countries, both foreign and domestic PV companies are going through painful restructuring. Under these circumstances, the Korean PV industry needs to find a new strategy for making a breakthrough, and in this sense a proactive role of the Korean government is desperately needed.

• 한국태양에너지학회 논문집
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• 제31권3호
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• pp.89-94
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• 2011

In this study, we measured the wind data as new and renewable energy resources and carried out the evaluation of uncertainty about these data with the authentic standards. These data collected at the 20 locations in korea. We carried out the processing and evaluation about these data with standards as ISO, GUM, and IEC. Whereby these data become standards data and the credibility are gained. These data include some information as direction, humidity, pressure, temperature, and energy density. The annual average of wind speed(in Hamo) was measured as 9.5m/s, then the uncertainty was evaluated as ${\pm}0.88m/s$. We judge the credibility of data by expression of reliability quantitatively. In additional, the standards data is able to approach anywhere and it will be used to support of related research and industry.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 D
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• pp.917-919
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• 1997

Recently, electric industry confront a strategical change and high competiveness environment in the course of deregulation. Especially, rapid growth in electricity demand, financial need for new power plant construction, and environmental problems have led to search for more efficient energy production and energy conservation technologies in Korea. Due to the potential energy and cost savings, DSM(Demand-Side Management) plays and important role in the electric resource planning. In this paper, we suggest DSM potential evaluation procedures and algorithm. Also, we present screening analysis methods for DSM potential evaluation.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.590-599
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• 2006

In this study, Liquefaction characteristics of saturated sand under various dynamic loadings such as sinusoidal loading, increasing wedge loading, and real earthquake loading were investigated focusing on the dissipated energy. From the results of cyclic triaxial test, liquefaction resistance strength was calculated by the concept of energy according to the type of input loading. Liquefaction resistance strength was expressed in accumulated dissipated energy calculated from stress-strain curve(hysteresis loop). The dissipated energy according to loading type was compared and the energy-based evaluation was proposed. The procedures are presented in terms of normalized energy demand(NED), normalized energy capacity(NEC), and factor of safely, where NED is the load imparted to the soil by the loading(both amplitude and duration), NEC is the demand required to induce liquefaction, and factor of safely is defined as the ratio of NEC and NED.

• 설비공학논문집
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• 제25권7호
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• pp.363-370
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• 2013

HVAC&R systems are the most energy consuming building services, representing approximately half of the final energy use in the building sector. Despite their significant energy use, there is a lack of a consistent and homogeneous framework to efficiently guide research. This research is about the energy consumptions of HVAC&R systems, with the aim of establishing a common idea for the analysis of building energy efficiency. Our approach deals with the concept of an HVAC&R set that is composed of subsystems. A matrix combination evaluation is examined, and a total of 960 sets can be implemented in a large scale office building. A method as a tool for energy evaluations of HVAC&R systems, and HEET as a energy simulation program, were developed.

• 에너지공학
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• 제25권4호
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• pp.236-244
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• 2016

본고에서는 에너지절약 홍보활동 성과에 대한 평가지표 설정은 Lasswell(1948), 노영우(2012)의 사례를 토대로, 먼저 홍보기관의 지표는 평판도, 인지도, 호감도, 신뢰도, 소통여부 등으로 구성되었다. 홍보내용은 첫째, 홍보내용에 대한 인식 평가지표로 홍보활동 내용의 인지도, 접촉도, 필요성, 홍보내용의 공감도, 절약의 영향력 등 8개 문항이며, 둘째는 홍보내용에 대한 평가지표로 홍보활동 내용의 만족도와 기여도 문항으로 구성되어 있다. 홍보매체에 대한 평가지표는 접촉하는 주요 홍보매체에 대한 식별, 접촉 매체의 신뢰도와 효과성, 그리고 에너지소비자가 홍보를 직접적으로 할 경우 가장 선호하는 홍보매체에 대한 식별 등이 평가항목으로 구성되어 있다. 홍보효과에 대한 평가지표는 실천도, 실행 강도, 그리고 실천이유와 실천하지 않는 이유 등이 평가항목으로 포함되어 있다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2005년도 춘계학술대회
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• pp.600-603
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• 2005

U.S. National Research Council proposed benefits framework for energy R&D project as economic benefits, environmental benefits, security benefits and knowledge benefits. Following this framework, U.S. National Renewable Energy Laboratory evaluated the projected benefits of Federal Energy Efficiency and Renewable Energy Programs in the indicators of energy-expenditure savings, energy system cost savings, $CO_2$ emissions reductions. oil savings, natural gas saving and avoided additions to central conventional power. As this result, geothermal energy have predominant position in the energy-expenditure savings, natural gas saving and avoided addi t ions to central conventional power to FY2050. The projected benefits, in monetary value, of the whole supply-potential of geothermal energy in Korea were evaluated as 480.2 billion Won, 43.1 billion Won and 135.8 billion Won for the private energy-cost savings, social environmental-cost savings, and import energy-cost saving, respectively.

• 전기학회논문지
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• 제61권7호
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• pp.950-956
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• 2012

As development of battery technologies, the installation of Battery Energy Storage System (BESS) increased. The BESS can be used for various purposes such like frequency response, load leveling, and fluctuation mitigation of renewable energy generators. In this paper, three state BESS model is proposed. the BESS model considering charge, discharge and keeping efficiency, and life cycle according to depth of discharge (DOD). Then, the benefit and cost of BESS installed at substation for load leveling are summarized. The economic evaluation of BESS is analyzed using net present values (NPV) analysis. In case study, the NPV analysis of NaS battery system is carried out using the proposed BESS model. Because the result of economic evaluation of BESS using nowadays cost data is not positive, the sensitivity analysis of BESS is conducted by changing the capital cost and energy cost.

• 한국태양에너지학회 논문집
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• 제24권3호
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• pp.73-83
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• 2004

The purpose of this study is to select the optimal transmittance rate of windows in office buildings through subjective evaluation and energy performance analysis(computer simulation program ; DOE 2.1E). The results are as follows ; 1) In the subjective evaluation experiment, minimum transmittance of the glass is GE 30% and LT 70%, but the optimal transmittance rate is concluded in $40%\sim60%$. 2) As a result of the energy performance analysis, it is desirable for the building of consumptive with mainly air-conditioning to make transmittance as 40-60%. 3) Comparing foreign study on minimum and optimal transmittance rate is $25%\sim38%$, the minimum transmittance of this study is almost the same. But for the optimal transmittance rate, 20% more is needed for KOREAN.

• 한국전자통신학회논문지
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• 제8권9호
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• pp.1333-1342
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• 2013

신재생에너지산업의 발전은 에너지원의 문제를 해결하기 위한 필수적인 과제라 할 수 있다. 이에 따라 세계 각국에서 신재생에너지산업을 위해 적극적으로 움직이고 있다. 신재생에너지산업은 아직 산업기반이 약하고, 산업의 특성상 규모의 경제 및 기술개발을 위한 초기 투자가 필요한 경우가 많다. 따라서, 신재생에너지산업을 육성하기 위한 정책이 실행되고 있는데 우리나라 뿐만 아니라 많은 나라에서 대표적으로 실행하는 정책이 RPS와 FIT 정책이다. 신재생에너지산업은 다양한 이해관계와 경제, 사회, 환경, 국제 등의 변수를 동시에 가지고 있으므로 이를 종합적으로 고려한 정책이 필요하다. 신재생에너지산업의 경우 평가의 지표에 해당하는 부분이 많고 고려되어야 할 변수가 많으나, 이를 모두 고려하기 힘들고 고려한다 하더라도 일관된 기준이 마련되어 있지 않은 상황이다. 따라서, 본 연구에서는 신재생에너지정책을 평가하기 위한 평가지표를 개발, 제시한다.