PV모듈 모델링에 의한 성능모의 결과비교

蘇楨訓(Jung-Hun So),兪炳圭(Byung-Gyu Yu),黃?美(Hye-Mi Hwang),劉權鍾(Gwon-Jong Yu),崔宙燁(Ju-Yeop Choi) 대한전기학회 2008 전기학회논문지 Vol.57 No.11

Photovoltaic (PV) modules operate over a large range of conditions but manufacturer's information is not sufficient to determine their overall performance. Designers need a reliable tool to predict energy production from a photovoltaic module under all conditions in order to make a sound decision. The modeling method of photovoltaic (PV) module are useful to perform detailed analysis of PV system performance for changing meteorological conditions, verify actual rated power of PV system sizing and determine the optimal design of PV system and components. This paper indicates a modeling approach of PV module performance in terms of meteorological conditions and identifies validity of PV modules modeling by comparing measured with simulated value.

Reliable Output Performance of a Photovoltaic–Piezoelectric Hybridized Energy Harvester with an Automatic Position-Adjustable Bending Instrument

김영민,김욱,최동휘,최덕현 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.4

In this work, we propose a rationally designed hybrid-bending instrument for reliably evaluating the functionality of a flexible photovoltaic–piezoelectric hybrid generator (PPHG) under simultaneously incident solar and mechanical energies. The deformation height of the PPHG is formulized and estimated on the basis of the geometric analysis of the bent PPHG to automatically calibrate the unexpected changes in experimental conditions during the simultaneous application of solar and mechanical stimuli. By using the proposed instrument, we successfully evaluate the performance of the PPHG and confirm that the developed instrument could prevent the over-evaluation of photovoltaic performance caused by the change in the height of the PPHG during mechanical bending. Thus, we objectively characterize the output behavior of the PPHG under simultaneously incident solar and mechanical stimuli. Our work in this study would contribute to developing an appropriate strategy for accurate characterization, which helps understand the underlying synergistic mechanism of hybrid energy harvesters.

Power performance of photovoltaic-integrated lightshelf systems

Hwang, Taeyon,Kim, Jeong Tai,Chung, Yugun Sage Publications 2014 Indoor and Built Environment Vol.23 No.1

<P>The lightshelf system, a sort of daylighting device, has been applied to improve the visual environment by optimal light distributions and intense illumination levels of an interior. Also, the photovoltaic is one of the most important sustainable technologies applicable to architectures. The purpose of this study was to evaluate basic data to develop the photovoltaic (PV)-integrated lightshelf systems for office buildings. The performance of PV lightshelves was evaluated by using 1/5 scaled model. The scaled office models were made and the field tests were experimented under clear sky according to installation conditions. The results have illustrated that the power performance of the PV lightshelves was excellent on the horizontal plane where the sunlight incidence occurred vertically, and that the larger the installation angle, the more rapid decrease in power performance was recorded. However, if the other performance including daylight and energy of a PV-integrated lightshelf should be considered, complementary research is necessary in any future study.</P>

실험에 의한 공기식 PVT 컬렉터의 열 ‧ 전기 성능에 관한 연구

김상명,김진희,김준태 한국태양에너지학회 2019 한국태양에너지학회 논문집 Vol.39 No.2

PVT (Photovoltaic/thermal) system is technology that combines PV and solar thermal collector to produce and use both solar heat and electricity. PVT has the advantage that the energy production per unit area is higher than any single use of PV or solar thermal energy systems because it can produce and use heat and electricity simultaneously. Air-type PVT collectors use air as the heat transfer medium, and the air flow rate and flow pattern are important factors affecting the performance of the PVT collector. In this study, a new air-type PVT collector with improved thermal performance was designed and manufactured. And then thermal and electrical performance and characteristics of air-type PVT collector were analyzed through experiments. For the thermal performance analysis of the PVT collector, the experiment was conducted under the test conditions of ISO 9806:2017 and the electrical performance was analyzed under the same conditions. As a result, the thermal efficiency increased to 26~45% as the inlet flow rate of PVT collector increased from 60~200 m3/h. Also, it was confirmed that the air-type PVT collector prevents the PV surface temperature rise according to the operating conditions.

태양광열 복합 시스템의 전기 및 열 성능 분석

어승희 ( S. H. Euh ),이정빈 ( J. B. Lee ),최윤성 ( Y. S. Choi ),김대현 ( D. H. Kim ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2011 강원 농업생명환경연구 Vol.23 No.3

A photovoltaic/thermal (PVT) solar system is the technology that allows for simultaneous conversion of solar energy into both electricity and heat. PVT system consisted of PV module and thermal absorber plate unified has advantages of improving both the electrical and thermal performances, increasing aesthetic views, and reducing the space and material cost as compared to the separated PV module and solar thermal systems being placed side by side. In this study, the performance analysis of the PVT system was conducted. The maximum power generated was approximately 240W which was similar to the PV module specification, and the highest working fluid (water) temperature in the storage tank was 67℃ which was lower than the solar thermal system specification given due to blocking direct solar radiation to the absorber plate by PV module. The further investigation such as performance analysis compared with the separated PV module and solar thermal systems regarding power, flow rate of working fluid, packing factor needs to be performed.

기상정보를 활용한 태양광 발전량 모니터링 계량모형

주영찬,김정인,박성용 재단법인 에너지경제연구원 2019 에너지경제연구 Vol.18 No.1

As the weather services markets enter the new phase due to information integration and open information services, a lot of service providers start to consider new weather business models using these preliminary data. This study proposes a simple econometric model that can monitor the photovoltaic and provide contextual information using various weather information. To analyze the effects of weather conditions (insolation, temperature, precipitation, wind speed, humidity and cloud) on the daily photovoltaic located in Seoul, Hongseong and Uiseong, we incorporate a quantile regression approach that has been widely used in economic literature. In addition, data format transformations are considered to take care of nonlinearity of the time-series variables. This study provides photovoltaic monitoring methods by estimating the conditional distributions of hourly power performances. 기상정보시장이 정부의 공공정보 개방과 정보융합환경 구축으로 새로운 국면을 맞이함에 따라 많은 사업자들은 기초기상정보를 활용한 새로운 비즈니스모델을 기대하고 있다. 이 연구에서는 이러한 수요에 맞는 정보를 제공하고자 다양한 기상정보를 활용하여 태양광 발전량을 모니터링할 수 있는 실질적인 표준 계량모형을 제안하였다. 본 연구에서는 잘 알려진 분위수회귀모형을 사용하여 서울, 홍성, 의성에 위치한 일별 태양광 발전량에 일사량, 기온, 강수량, 풍속, 습도, 전운량이 미치는 영향을 추정하였다. 또한 변수의 비선형성을 고려한 변수 변환 방법을 사용함으로써 예측의 정확성을 높이고자 하였다. 또한 시간별 발전량의 조건부분포를 추정하여 태양광 발전을 모니터링 할 수 있는 방법을 제시하였다.

Improving the prediction performance of the finite element model for estimating the technical performance of the distributed generation of solar power system in a building façade

Koo, Choongwan,Hong, Taehoon,Oh, Jeongyoon,Choi, Jun-Ki Elsevier 2018 APPLIED ENERGY Vol.215 No.-

<P><B>Abstract</B></P> <P>As interest in the distributed generation of solar power system in a building façade continues to increase, its technical performance (i.e. the amount of electricity generation) should be carefully investigated before its implementation. In this regard, this study aimed to develop the nine-node-based finite element model for estimating the technical performance of the distributed generation of solar power system in a building façade (FEM<SUB>9-</SUB> <I> <SUB>node</SUB> </I>), focusing on the improvement of the prediction performance. The developed model (FEM<SUB>9-</SUB> <I> <SUB>node</SUB> </I>) was proven to be superior to the four-node-based model (FEM<SUB>4-</SUB> <I> <SUB>node</SUB> </I>), which was developed in the previous study, in terms of both prediction accuracy and standard deviation. In other words, the prediction accuracy (3.55%) and standard deviation (2.93%) of the developed model (FEM<SUB>9-</SUB> <I> <SUB>node</SUB> </I>) was determined to be superior to those of the previous model (FEM<SUB>4-</SUB> <I> <SUB>node</SUB> </I>) (i.e. 4.54% and 4.39%, respectively). The practical application was carried out to enable a decision maker (e.g. construction manager, facility manager) to understand how the developed model works in a clear way. It is expected that the developed model (FEM<SUB>9-</SUB> <I> <SUB>node</SUB> </I>) can be used in the early design phase in an easy way within a short time. In addition, it could be extended to any other countries in a global environment.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Distributed generation of solar power system in a building façade was investigated. </LI> <LI> Key design variables largely affect the technical performance of the DGSP system. </LI> <LI> The prediction performance of nine-node finite element model (FEM<SUB>9-</SUB> <I> <SUB>node</SUB> </I>) increased. </LI> <LI> The mean absolute percentage error of the developed model was determined at 3.55%. </LI> <LI> Decision makers can use the developed model by simply entering project information. </LI> </UL> </P>

실측 실험을 통한 커튼월형 액체식 태양광·열 시스템(CW. L-PVTs)의 성능분석

김윤호(Kim, Yun-Ho),황정하(Hwang, Jung-Ha) 한국건축친환경설비학회 2020 한국건축친환경설비학회 논문집 Vol.14 No.6

Recently, among the new renewable energy systems relying on solar energy, a liquid-type photovoltaic thermal system developed by combining solar power and solar thermal systems is becoming widely available. This study thus developed and prototyped the curtain wall-type liquid-type photovoltaic thermal systems (CW. L-PVTs) that can be installed on the curtain wall of the building’s outer wall to efficiently mount L-PVTs in buildings with a limited construction area. To analyze the thermal and electrical performance, the study was conducted in the following way. First, the principles and characteristics of CW.L-PVTs were analyzed as proposed in previous studies. Second, detailed specifications of the manufactured CW.L-PVTs, outdoor testing equipment, and environmental conditions were explained, and parameters of the performance test were set. Third, outdoor experimental measurements were conducted depending on the weather condition and inlet water temperature according to the ISO 9806 solar thermal collector performance test methods. Fourth, the amount of energy generation according to inlet water temperature, solar insolation amount by outdoor condition, and ambient temperature were analyzed, and the electric and the thermal efficiency of CW.L-PVTs were calculated to evaluate the performance.

태양광열 · 지열 하이브리드 시스템의 적정 용량 설계를 위한 동적 에너지 시뮬레이션

정용대(Jeong, Yong-Dae),남유진(Nam, Yujin),여성구(Yeo, Seong-gu) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.7

Recently, the ground source heat pump (GSHP) system is actively used because it has high performance of system comparing with other conventional systems. However, the systemic performance can decrease due to excessive and prolonged operation periods. This problem can be solved by combining with other heat source systems. In this research, a hybrid system with GSHP and PVT (Photovoltaic-Thermal) system was proposed and the analysis of system performance was conducted. The analysis model was made by TRNSTS17 and annual performance was calculated based on hourly system performance and weather data. In this paper, in order to decide suitable system capacity between GSHP and PVT, case studies was conducted according to the capacity change of individual system. The simulation was carried out considering various building conditions and local conditions. In the results, a hybrid system can achieve 15.5% higher performance at most than only GSHP system.

태양광 다채널 어레이 테스터 성능 비교분석

임애솔(Aesol Im),윤희상(Heesang Yoon),신우균(Woogyun Shin),임종록(Jongrok Lim),황혜미(Hyemi Hwang),주영철(Youngchul Ju),고석환(Sukwhan Ko),강기환(Gihwan Kang) 한국태양에너지학회 2018 한국태양에너지학회 학술대회논문집 Vol.2018 No.11