http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 아메드 나비드(Ahmed T Naveed) (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
아메드 나비드(Ahmed T Naveed),강은철(Kang Eun-Chul),이의준(Lee Eui-Joon) 한국태양에너지학회 2005 한국태양에너지학회 논문집 Vol.25 No.4
PV 태양광 발전은 PV 재료가 고가이므로 일반 전력비용에 비해 상대적으로 비용이 높아진다. 저가형 광학 집광기술과 PV를 통합하게 되면, 비용뿐만 아니라 설치면적 등에서 유리하게 되나, 집광기의 단점이 함께 추가되게 된다. 집광기는 작은 수광각과 송신광선을 갖고 있어 PV 모듈에 필요한 태양광, 광학손실의 손실정도를 최소화하기 위한 신중한 시스템 디자인과 2축형 트레킹 장치가 필요하다. 고정식 비집광 시스템보다 더 많은 에너지를 얻기 위해서는 광학시스템의 손실율을 줄이고, 고효율의 PV 모듈을 이용한 PV 셀의 상호연결이 필요하다. 본 논문에서는 우선, 비이미지 프레넬 렌즈 집광기를 사용한 PV 시스템에 대하여 간단하게 설명한 후, 출력전력값을 이론적으로 예측하고 PV 효율과 시스템 성능을 제시하였다. 프레넬 렌즈 선형 집광기 통합 PV 시스템과 비집광 PV 모듈의 출력전력값과 시스템 비용을 비교하면, PV 전력비용을 줄일 수 있는 집광기의 이용이 유용한 것을 알 수 있다. 따라서, 집광형 PV 시스템은 미래의 에너지 이용에 매우 유리한 시스템이라 할 수 있다.
-
RETScreen(R) 지중열 히트펌프 모듈 한국 적용에 관한 연구
아메드 나비드(Naveed, Ahmed T),박상현(Park, Sanghyun),이의준(Lee, Euijoon),김병선(Kim, Byungseon) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Korea is utilizing geothermal resources mainly in the bathing and swimming facilities with very few applications for industrial processes or space heating. It is estimated that geothermal capacity and annual utilization are 36.2MWt and 761TJ/year as compared to global capacity and annual utilization of 15,145MWt and 190,699 TJ/year. RETScreen software is a user's friendly tool for analyzing the technical and financial pre-feasibility of potential Renewable Energy (RE) projects that promotes the use of RE applications through the capacity building of planners, decision-makers and industries for successful implementation of RE projects. Strong ties between Canada and Korean organizations such as Korean Solar Energy Society (KSES) and the Korea Institute of Energy Research (KIER) exist for knowledge transfer about RETScreen. In this paper, an overview of RETScreen and its ground source heat pump (GSHP) model with a practical example of an existing project of a community hall in Canada are described to illustrate effectiveness of RETScreenin the implementation of RE technologies. The same community hall project is then evaluated hypothetically considering its location at Kangnyng, Korea. The main objective is to demonstrate how RETScreen GSHP model can also be utilized effectively for GSHP applications in Korea.
-
아메드 나비드(Naveed, Ahmed T),강은철(Kang, E. C.),이의준(Lee, E. J.) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Photovoltaic (PV) module can generate electricity using sunlight without causing any environmental degradation. Due to higher fossil fuel prices and environmental awareness, PV applications are becoming more popular as clean source of electricity generation. PV output is sensitive to the operating temperature and can be drastically affected in Building Integrated PV (BIPV) systems. PV Solarwall (SWPV) combination and PV systems have been evaluated in this study for improvement in electrical output and system costs. PV modules under forced ventilation. A 75W polycrystalline silicon PV module was fixed on SW in front of the ventilation fan as it was indicated to be the coolest position on the SW in phoenix simulations. The effectiveness of cooling by means of the forced ventilating air stream has been studied experimentally. The results indicate that there appears to be significant difference in temperature as well as electricity output comparing the SWPV and BIPV options. Electrical output power recovered is about 4% during the typical day of the month of February. RETScreen(R) analysis of a 3kW PV system hypothetically located at Taegu has shown that with typical temperature reduction of 15^{{circ}C, it is possible to reduce the simple payback periods by one year. The work described in this paper may be viewed as an appraisal of a SWPV system based on its improved electrical and financial performances due to its ability to operate at relatively lower temperatures.
-
강은철(Kang Eun-Chul),아메드 나비드(Ahmed T Naveed),김용환(Kim Yong-Hwan),조일식(Cho Yil-Sik),이의준(Lee Euy-Joon) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-
Relatively higher electricity generation costs of PV due to the use of expensive PV raw materials is one of the barrier to its wide spread utilization as a clean and environmental friendly electricity source. One option to overcome this cost barrier is the use of concentrating photovoltaic(CPV) system. A CPV system with a linear Fresnel film collector has been proposed to make a focal line over PV module which can be rotated manually along two axes to track the sun and the measurement system. The experiments to analyze outdoor current and voltage on the CPV module were made on January 23, 2006 in Daejeon. As results, the electrical power output of the CPV module was 4 times higher than the PV module during the measurement duration. The power at the maximum point at the PV module was 15.3W at the 25℃. The fill factor and efficiency were 0.7 and 19.46% respectively. While the measurement temperature was 55℃ under concentration of 3.2 sun. The fill factor of the CPV module due to concentration and higher operating temperature was deteriorated as evident from the shape of the I-V curve. The efficiency and fill factor were 12.8% and 0.5 respectively. The power, current and voltage at the maximum power point concentration were 32.2W, 3.8A and 8.6V.
ScienceON
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
