• 대한공업교육학회지
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• 제31권2호
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• pp.177-202
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• 2006

이 연구의 목적은 전기 전자 통신 계열 공업교사들의 교수능력 수준과 교육요구를 구명하는데 있었다. 연구목적의 달성을 위해 250개 전기 전자 통신 관련 학과에 근무하는 750명의 전기 전자 통신 계열 공업교사를 대상으로 설문 조사를 실시하였다. 자료수집에 사용된 조사 도구는 3개 영역, 총 30개 교수능력에 대한 중요성 인식 수준과 현재의 교수능력 수준을 5점 리커트 척도로 응답하도록 구성하였다. 최종분석에 443부가 사용되었으며, 각 교수능력에 대한 교육요구는 보리치(Borich)의 교육요구도 계산공식을 사용하여 산출하였다. 주요 연구 결론은 다음과 같다. 첫째, 전기 전자 통신 계열 공업교사들은 30가지 교수능력에 대하여 평균적으로 모두 중요하다고 인식하고 있다. 특히, 교수능력 가운데 학생들의 수준과 흥미를 파악하는 능력에 대하여 가장 중요하다고 인식하고 있다. 둘째, 전기 전자 통신 계열 공업교사들은 30가지의 교수능력에 대한 중요성 인식 수준보다 낮은 수준의 교수능력을 가지고 있다. 특히, 교수능력 중 '실습시 시범보이기'에 대한 능력수준이 가장 높으나, '모의학습법 적용'에 대한 능력수준이 가장 낮다. 셋째, 교수능력 중 전기 전자 통신 계열 공업교사들의 교육요구가 높은 항목은 '학생들의 수준과 흥미 파악', '문제해결법 적용', '학습내용 재구성', '성취할 수업목표 설정' 등이고, 반면에 교육요구가 가장 낮은 항목은 '컴퓨터 매체 활용'이다. 넷째, 전기 전자 통신 계열 공업교사들의 교수능력에 대한 교육요구 순위는 성별, 학력, 교직경력, 산업체 근무경험, 근무지, 학교 설립유형에 따라 차이가 있다.

• 한국주거학회논문집
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• 제22권6호
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• pp.43-50
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• 2011

Korea is a country with an exceptionally high energy consumption. For economic reasons, Korean households are forced to save more energy. Korea's household energy consumption has grown slowly compared to other sectors and household energy consumption per capita is lower than the OECD average. However, its per capita electricity consumption soared and is expected to remain climbing mainly due to the increasing number of one-person households. To establish an effective strategy against a possible electricity shortage, the actual condition survey of electricity energy consumption first needs to be clearly understood. This study adopted both a general survey and a detailed survey of people living in apartment housings and data was collected on electrical appliance use according to individual schedules. Based on these data, the results were used to attempt to analyze electricity consumption patterns resulting from energy using activities of residents and to determine electricity consumption propensity according to each household member's characteristics in apartment housings.

• 설비공학논문집
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• 제28권10호
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• pp.381-386
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• 2016

An optimization algorithm is developed based on a simulation case of a single family house model equipped with PV arrays. To increase the nationwide use of PV power generation facilities, a market-competitive electricity price needs to be introduced, which is determined based on the time of use. In this study, quadratic programming optimization was applied to minimize the electricity bill while maintaining the indoor temperature within allowable error bounds. For optimization, it is assumed that the weather and electricity demand are predicted. An EnergyPlus-based house model was approximated by using an equivalent RC circuit model for application as a linear constraint to the optimization. Based on the RC model, model predictive control was applied to the management of the cooling load and electricity for the first week of August. The result shows that more than 25% of electricity consumed for cooling can be saved by allowing excursions of temperature error within an affordable range. In addition, profit can be made by reselling electricity to the main grid energy supplier during peak hours.

• 품질경영학회지
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• 제50권3호
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• pp.617-634
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• 2022

Purpose: This paper introduces Pohang University of Science Technology (POSTECH) advanced metering infrastructure (AMI) and Open Innovation Big Data Center (OIBC) platform and analysis results of electricity consumption data collected via the AMI in POSTECH campus. Methods: We installed 248 sensors in seven buildings at POSTECH for the AMI and collected electricity consumption data from the buildings. To identify the amounts and trends of electricity consumption of the seven buildings, electricity consumption data collected from March to June 2019 were analyzed. In addition, this study compared the differences between the amounts and trends of electricity consumption of the seven buildings before and after the COVID-19 outbreak by using electricity consumption data collected from March to June 2019 and 2020. Results: Users can monitor, visualize, and download electricity consumption data collected via the AMI on the OIBC platform. The analysis results show that the seven buildings consume different amounts of electricity and have different consumption trends. In addition, the amounts of most buildings were significantly reduced after the COVID-19 outbreak. Conclusion: POSTECH AMI and OIBC platform can be a good reference for other universities that prepare their own microgrid. The analysis results provides a proof that POSTECH needs to establish customized strategies on reducing electricity for each building. Such results would be useful for energy-efficient operation and preparation of unusual energy consumptions due to unexpected situations like the COVID-19 pandemic.

• Journal of Advanced Marine Engineering and Technology
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• 제37권8호
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• pp.977-983
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• 2013

본 연구는 섬 주거시설의 전력부하 변동특성에 적합한 태양광발전설비와 풍력발전설비로 구성된 하이브리드 발전시스템의 발전특성을 예측하고 성능을 평가하는 것을 목적으로, 경상남도 통영시에 소재하는 곤리도를 대상으로 수행한 사례연구 결과이다. 연구 결과, 시각별 전력부하 변동률, 시각별 풍력 발생 변동률, 시각별 일사량 변동률 등이 서로 다르기 때문에, 단순히 전력부하측과 풍력 혹은 태양광발전설비를 1:1로 조합한다면 상호간에 불균형이 발생하여 비효율적임을 알 수 있었다. 또한 부하용량선정방법인 최대부하법과 일일부하법으로 하이브리드 발전시스템의 각 용량을 설정할 경우의 성능을 비교한 결과 두 방법 모두 축전지를 포함한 풍력발전설비만 설치했을 때가 가장 효과적인 것으로 나타났는데 이는 풍력은 태양광과 달리 24시간 지속적으로 발생하기 때문이다.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2004년도 춘계 학술발표회 논문집
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• pp.353-358
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• 2004

In recent, the trends in national energy Policy are established in the context of the integrated risk estimation for various national electricity generating options. The approach takes account of health, environmental, economic, and social aspects of electricity generation systems. In the present work, nuclear, coal, and LNG sources are chosen because these hold more than 90% of national total electricity generation in a descending order. A life cycle assessment (LCA) methodology is used for comparing environmental impacts of these options during the life cycle such as construction, operation as well as disposal stages. Here, the LCA consists of life cycle inventory analysis, classification/selection process of impact categories, characterization process, and normalization process of each category. LCA can be an useful tool for environmental impact assessment of future national energy options. At the planning stage of future energy Policies, the results of LCA would be taken into consideration. According to data update at the construction and disposal stages, the LCA needs to be conducted iteratively.

• 조명전기설비학회논문지
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• 제30권3호
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• pp.39-45
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• 2016

In these days global energy policy is changed from "supply" to "demand". In this regards, there are needs to analysis on effect of policy such as energy efficiency strategy, electricity rates. This study examines the relationship between energy consumption reduced by new energy policy and GDP growth for each industrial sector for Korea from 1970 to 2013. With respect to the direction of causality, energy use of 1th industry like agriculture and mining leads to GDP growth. On the other hand, GDP growth of 2nd industry, manufacturing, leads to energy use. And there is bidirectional causality in 3rd industry, service sector. These findings imply that the government policies aimed at reducing electricity consumptions and increasing energy efficiency should be progressed cautiously depend on status of each industry condition.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.443-445
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• 2001

As the new large buildings are continuously being built with the advanced technology and skills, an adequate size of electric room needs to be obtained so that engineers establish an efficient and reliable system in the electric room. Considering the current capacity, its expansion and its connecting system, the final size of it should be determined in order to bring an effective use of the building. Usually the extension of electricity capacity is on the increase after construction and it comes from the lack of scientific evaluation on the electric room. Later when the expansion of computer and important electric equipment that needs much capacity is impossible, it will cause a great deal of damage to the renting business of the building as well as becomes the unstable factors of the whole system. Therefore, it is important to have the exact method of calculating the effective size of electric room, the heart of the building, especially when the value of land price is very high. In addition, it should be calculated in an accurate way due to the diversification of the system and the compact size of the electricity equipment. However, the research on this area and the comparison and evaluation of the size after construction have not been made enough and the results of them have not been applied when calculating a new size of electric room. Accordingly, this study examines three methods prescribed in the standards of electricity installation technology through case analysis and suggests substantial data by system, capacity, and purpose.

• Nuclear Engineering and Technology
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• 제54권2호
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• pp.749-763
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• 2022

The fulcrum of economic development is a sustainable supply of electricity. Nigeria is plagued with blackouts, with one of the lowest per capita electricity consumption in the world (circa. 120 kWh per capita). Hence, policies have been instigated to integrate electricity generation from nuclear power plants (NPP) on or before 2027. However, a critical requirement for NPP generation is the implementation of robust human resource development (HRD) programs. This paper presents the perspective of Nigeria in assessing human resources needs over the entire NPP lifecycle following the milestone approach and employing the IAEA's Nuclear Power Human Resource (NPHR) modeling tool. Three workforce organizations are in focus including the owner/operator, regulators, and construction workers following three decades timeframe (2015-2045). The results indicate that for the study period, a maximum of approximately 9045 personnel (73% construction workers, 24% owner/operator, and 3% regulators) should be directly involved in the NPP program just before the commissioning of the third NPP in 2033. However, this number decreases by about 73% (2465 personnel including 94% operator and 6% regulator) at the end of the study timeframe. The results can potentially provide clarity and guidance in HRD decision-making programs.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.776-781
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• 2008

In this paper, comments on the needs of establishment of railway test line - capable of mid and long term performance evaluation of vehicle/infra/electricity/signal component/system - are described. Based on the previous studies, national/social/economic needs, the states of similar lines of foreign countries, concept of test line, and basic application plan are summarized. Especially, core things needed to the establishment of test line are commented.