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이효문(Lee Hyomun),배상순(Bae SangSoon),최민주(Choi Minjoo),김동수(Kim Dongsu),윤종호(Yoon Jongho) 한국태양에너지학회 2022 한국태양에너지학회 논문집 Vol.42 No.5
Photovoltaic (PV) systems are commonly used as on-site electric power generators for ZEBs in the Republic of Korea. To enhance the performance of PV systems, considering efficient installation conditions, such as the optimal azimuth and tilt angles, is critical. Under domestic PV application guidelines, the azimuth of installation for building-applied PV systems is stipulated within a maximum of ±90° based on the south-facing direction. In general, the north-facing direction is known as a weak position for PV systems. However, several studies have shown that the north-facing direction can be a good option for building PV installations, typically when the installation areas are limited within a building site. Even if the PV panel faces north, the system can operate effectively with proper performance when installed at a suitable inclination angle. In existing studies, system behavior has been verified based on simulation-based analysis, but actual operational data analysis remains insufficient. This study aims to evaluate the feasibility of north-facing PV systems based on a performance evaluation of the measured data of a roof PV system. The roof PV system analyzed in this study was composed of modules, module-level power electronics (MLPE), and one inverter. The PV modules and MLPEs were installed on both the southern (SIR) and northern (NIR) inclined roofs. Based on the annual cumulative DC power, the energy yields of the MLPE connected to modules of the SIR and NIR are 1,445.0 and 1,068.7 ㎾h/㎾p, respectively. Our study found that the ratio of the performance of MLPE on the NIR to MLPE on the SIR was 74.0%. This ratio was similar to the energy yield of the PV system on the south vertical plane as compared to that on the south slope plane. The analyzed results revealed that an acceptable performance of the PV system installed on a northern slope at a suitable inclination angle could be expected as compared with other PV installations such as the southern vertical.
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주택보급형 태양전지 양산기술 및 계통연계 3kW 태양광 시스템 상용화 기술개발
이박일(Lee, Park-Il),문상진(Mun, Sang-Jin),윤종호(Yun, Jong-Ho),김흥근(Kim, Heung-Geun),유권종(Yu, Gwon-Jong),윤태영(Yun, Tae-Yeong),김신섭(Kim, Sin-Seop),배상순(Bae, Sang-Sun),이준신(Lee, Jun-Sin) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.11
태양전지는 요구전력의 필요에 따라 직 병렬로 연결하여 태양전지 모듈(solar cell module)로 제품화한다. 태양전지가 실제로 전자제품에 연결해서 사용하기 위해서는 주변장치(BOS, Balance of System)가 사용된다. 또한 일사량의 강도에 따라 불균일한 직류전기가 발생되므로, 태양광발전시스템은 모듈을 직 병렬로 연결한 태양전지 어레이(solar cell array)와 안정된 전기공급을 위한 전력조정기(power conditioning system, 이하 PCS)가 필요하다. 또한 직류가 아닌 교류를 필요로 하는 응용제품에는 직 교류변환장치 인버터(inverter)를 필요로 한다. 본 과제는 전시를 위한 연구개발 목적보다는 태양광 시스템 보급 양산기술에 중심을 두어 태양광 산업경제를 활성화 하고자한다. 따라서 본 과제는 기존에 연구개발과 특수목적 시장 중심인 초고효율 태양전지 개발보다 경제적인 기여도와 파급효과가 크다.
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HPLC를 利用한 참기름中에 僞和된 들기름의 定量에 관한 硏究
林種弼,裵相淳 又石大學校 1989 論文集 Vol.11 No.-
The rapid separation of the natural triglycerides by acyl chain length and degree of unsaturation was investigated by performance liquid chromatography(HPLC). HPLC procedure was presented for quantitative determination of adulteration of sesame oil with perilla oil. The triglycerides were separated from each oil by thin layer chromatography(TLC), and fractionated into several groups on the basis of their partition numbers(PN) by reverse phase HPLC on a column packed with μ-Bondapak C_18 using chloroform and 2-propanol-acetone-methanol-acetonitrile (1+2+3+4) mixtures as a solvent. The HPLC chromatogram of pure sesame oil was composed of PN42, 44, 46, 48 and 50. Meanwhile, that of pure perilla oil was composed of PN36, 38, 40, 42 and 44. The PN42/44 peak height ratios of pure sesame oil were in the range of 0.457∼0.571. Meanwhile, those of pure perilla oil were in the range of 1.714∼1.896. A linear calibration curve is prepared by chromatographing known mixtures of the two oils and plotting the volume percent of sesame oil against the peak height ratio of a selected pair of peaks (PN 42/44).
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