• International Journal of Internet, Broadcasting and Communication
• /
• 제13권1호
• /
• pp.11-19
• /
• 2021

The purpose of this study is to check whether the satisfaction of the R&D (Research & Development) project directly affects the R&D performance, and to find out whether the satisfaction with regional connectivity and the satisfaction with the R&D operation management significantly mediate the relationship that the satisfaction with the R&D project has on the R&D performance. In order to verify the research hypothesis on this, a total of 51 companies located in Jeollanam-do that actually conducted R&D research projects were surveyed and analyzed. In order to conduct an empirical study based on the collected questionnaire, a survey questionnaire related to the variables of the study model was composed based on a sample of 51 questionnaires. We used the SPSS program to verify the hypotheses in this study, and the hypotheses were verified by analyzing the validity, reliability, correlation, and deflection. As a result, there was a positive (+) significant relationship between R&D project satisfaction and R&D performance. In addition, it was found that the relationship between R&D project satisfaction and R&D performance was significantly mediated by the satisfaction with R&D regional connectivity and satisfaction with R&D project operation management.

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

• 한국산학기술학회논문지
• /
• 제15권11호
• /
• pp.6518-6526
• /
• 2014

본 연구의 목적은 그린에너지 기술개발에 필요한 촉매기술에 대한 최신동향을 파악하는 것이다. 분석자료는 특허자료, 학술지 및 정부R&D과제에서 추출한 DB(특허 4,172건 논문 28,726건 정부과제 548건)이다. 분석기간은 특허와 논문의 경우 2001년에서 2012년이며, 정부과제의 경우 2001년에서 2011년이다. 분석방법은 정성적인 방법과 정량적인 방법을 적용하였다. 분석결과를 살펴보면 촉매기술은 역사가 오래되었음에도 불구하고 특허출원은 여전히 증가추세를 보이고 있으며, 특히 2008년을 기점으로 증가폭이 커지고 있다. 특허측면에서 연료전지 촉매기술이 41 9%, 석탄액화 가스화 촉매기술이 23 6% 순으로 나타났다. 논문측면에서 2004년과 2008년을 기점으로 상승폭에 큰 변화가 나타나고 있으며, 특히 연료전지와 수소에너지가 1위, 2위를 차지하고 있다. 정부과제는 수소에너지 기술이 256건(47%)으로 가장 높게 나타났다. 그린에너지 촉매기술 개발에서 연료전지, 수소 및 석탄액화기술이 부각되었다. 화석연료에서 비화석연료(녹색성장)로의 전환속도가 빨라지고 있다는 점을 파악할 수 있었으며 녹색성장에 대한 체계적인 R&D 실용화 전략 등 녹색산업의 주력사업화에 대한 보다 큰 관심이 필요하다는 시사점을 도출하게 되었다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2011년도 제42회 하계학술대회
• /
• pp.690-691
• /
• 2011

제주 스마트그리드 실증사업은 기기 설치, 시험운전 단계에서 실증운전 단계로 넘어가는 과정 중에 있다. 제주 가상전력시장기반 하에서 수요측 자원의 본격적인 Full-Scale 전력거래가 시작될 예정이며, 거래 수익 최대화를 위해서는 에너지저장장치의 적절한 운영이 필수적으로 요구된다. 당사에서는 에너지저장장치의 시간대별 운영 패턴 도출을 통해 가상전력시장에 참여할 수 있는 에너지저장장치 운영 프로그램을 개발하였다. 본 논문에서는 가상전력시장의 개요, 에너지저장장치 운영 프로그램의 개념과 실행 스케쥴, 그리고 입출력 데이터와 Flow Chart 등에 대하여 기술하였다. 향후 실증단계 진행 중에 신뢰할 만한 Raw Data와 거래 reference를 확보, 분석하고 적용하는 과정을 거치면서 운영 알고리즘을 조금 더 개선해야 할 필요가 있다.

• 신재생에너지
• /
• 제8권3호
• /
• pp.30-37
• /
• 2012

In this study, we studied solar cell and fuel cell. To estimate the technology competitiveness, we used patent analysis using patent information and delphi method. For patent analysis, PII indicating the impact of patent was used. Also to analysis PII, citations data of registered and published patent were used from 2001 through 2010 in the United States, Japan, South Korea and the European Patent Office. And the delphi method results of the 'International trend analysis on the Green Energy Technology and the establishment of international cooperation models(2009)' were cited to estimate the technology level. According to the analysis results, Korea's patent registration growth rate was fairly high, but the patent impact and technology levels were significantly lower than in the United States, Japan and Germany. Especially in the solar cell, United States's PII is 1.8, but Korea's PII is 0.2. And the technology level of United States is 7 to 8, but Korea's is 5 to 6. Therefore, to improve technology competitiveness, Korea need to enhance the core technology R&D, and set up the consumer-oriented R&D strategy for commercialization from R&D planning phase. In this study, we analysed competitiveness of renewable energy which is not actively discussed. But there are limitations of the study because we used the result of past research and patent data in the past 10 years. Therefore to accurate research the period of patent data should be extended. Finally diverse indicators for measuring the technology competitiveness should be researched and developed.

• 한국환경과학회지
• /
• 제23권6호
• /
• pp.1085-1093
• /
• 2014

We investigate the amount of potential electricity energy generated by wind power in Busan metropolitan area, using the mesoscale meteorological model WRF (Weather Research & Forecasting), combined with small wind power generators. The WRF modeling has successfully simulated meteorological characteristics over the urban areas, and showed statistical significant to predict the amount of wind energy generation. The highest amount of wind power energy has been predicted at the coastal area, followed by at riverbank and upland, depending on predicted spatial distributions of wind speed. The electricity energy prediction method in this study is expected to be used for plans of wind farm constructions or the power supplies.

• 한국전기전자재료학회논문지
• /
• 제35권6호
• /
• pp.562-567
• /
• 2022

Novel self-illuminated smart windows were fabricated consisting of Cu-doped ZnS (ZnS:Cu) powder and polymer-dispersed liquid crystal (PDLC). This smart window shows not only switchable transparency but also self-illumination without any attachable luminous body. Its electro-optical characteristics, transmittance, and luminance were investigated in relation to various applied voltages and composition ratios. The optical transmittance and luminous intensity increased with increasing applied voltages. However, the optical transmittance decreased with increasing ZnS:Cu powder content. One of the self-illuminated smart windows, which was fabricated with 9 wt% of ZnS:Cu, achieved the optical transmittance of 60.5% (at 550 nm) and the luminance of 11.0 cd/m² at 100 V. This smart window could be used as a normal switchable smart window in daytime and light-emitting signage at night.

• 한국통신학회논문지
• /
• 제35권7B호
• /
• pp.1091-1097
• /
• 2010

세계적으로 비효율적인 에너지 소비로 인한 에너지 및 환경 문제가 지속적으로 대두되고 있다. 최근 이 같은 문제를 해결하기 위해서 에너지-IT(Energy-IT, EIT)융합기술이 효과적인 해결책으로 큰 관심을 받고 있다. 하지만 국내에서는 스마트그리드 외 EIT 융합기술에 대한 정책적 연구개발 및 투자가 미흡한 실정이다. 따라서 본 논문에서는 EIT 융합 기술의 효용성을 조사하고 AHP(Analytic Hierarchy Process) 기법을 이용하여 EIT 융합기술을 도출한다. 본 연구를 통하여 정부의 국가 에너지 문제 해결과 경쟁력을 향상을 위한 정책 결정에 기여할 것으로 기대한다. 연구결과 에너지 저감 분야 중에서는 에너지절약형건물(green building) 분야가 가장 효용성 있는 융합분야로 분석되었고, 에너지절약형건물 분야 내의 융합기술 중에서 네트워크 기능을 활용한 건물 내 에너지소비기기가 기술성, 경제성 부문에서 높은 중요도를 받으면서 가장 높은 기술로 평가 되었다.

• 한국분말재료학회지
• /
• 제27권3호
• /
• pp.256-267
• /
• 2020

Metal additive manufacturing (AM) technologies are classified into two groups according to the consolidation mechanisms and densification degrees of the as-built parts. Densified parts are obtained via a single-step process such as powder bed fusion, directed energy deposition, and sheet lamination AM technologies. Conversely, green bodies are consolidated with the aid of binder phases in multi-step processes such as binder jetting and material extrusion AM. Green-body part shapes are sustained by binder phases, which are removed for the debinding process. Chemical and/or thermal debinding processes are usually devised to enhance debinding kinetics. The pathways to final densification of the green parts are sintering and/or molten metal infiltration. With respect to innovation types, the multi-step metal AM process allows conventional powder metallurgy manufacturing to be innovated continuously. Eliminating cost/time-consuming molds, enlarged 3D design freedom, and wide material selectivity create opportunities for the industrial adoption of multi-step AM technologies. In addition, knowledge of powders and powder metallurgy fuel advances of multi-step AM technologies. In the present study, multi-step AM technologies are briefly introduced from the viewpoint of the entire manufacturing lifecycle.

• 한국수소및신에너지학회논문집
• /
• 제33권5호
• /
• pp.515-524
• /
• 2022

In this study, the on-site hydrogen production process for refueling stations that were not energy-optimized was improved through exergy analysis and heat exchange network synthesis. Furthermore, the process was scaled up from 30 Nm3/h to 150 Nm3/h to improve hydrogen production capacity. Exergy analysis results show that exergy destruction in the SMR reactor and the heat exchanger accounts for 58.1 and 19.8%, respectively. Thus, the process is improved by modifying the heat exchange network to reduce the exergy loss in these units. As a result of the process simulation analysis, thermal and exergy efficiency is improved from 75.7 to 78.6% and 68.1 to 70.4%, respectively. In conclusion, it is expected to improve the process efficiency when installing on-site hydrogen refueling stations.