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김법전(Kim, Beob-Jeon),박재완(Park, Jae-Wan),윤종호(Yoon, Jong-Ho),신우철(Shin, U-Cheul) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.4
Increase of electronic power consumption for home and rise of electricity rate has been growing burden of consumers. For this reason many people become interested in Photovoltaic System for home. Photovoltaic System was analyzed in detail. The analysis is about factors which obstruct power generation and efficiency of PV System installed at independent houses household. Results showed that, for every 3kWp or 4kWp of power generation capacity, 1,369kWh/kWp and 1,359kWh/kWp are produced, respectively, thereby showing less than 1% capacity difference. Thus, it was concluded that there is a difference in the amount of power generation depending on capacity, but that there is no significant difference in the performance of the photovoltaic system due to this difference. It was also shown that, given the Capture loss, System loss, and Final yield of the yearly performances of the PV system, there appears to be no significant change in the capacity of the invertor to convert power from DC to AC. Power generated in each house hold appeared to be 5,227kWh/yr for the first unit; 4,108kWh/yr for the second unit; 4,136kWh/yr for the third unit; 5,302kWh/yr for the fourth unit; 4,195kWh/yr for the fifth unit, and 4,164kWh/yr for the sixth unit.
김법전(Kim Beob-Jeon),임희원(Lim Hee-Won),김덕성(Kim Deok-Sung),신우철(Shin U-Cheul) 한국태양에너지학회 2018 한국태양에너지학회 논문집 Vol.38 No.4
nZEH (net-Zero Energy House) is defined as a self-sufficient energy building where the sum of energy output generated from new & renewable energy system and annual energy consumption is zero. The electricity generated by new & renewable energy system with the form of distributed generation is preferentially supplied to electrical demand, and surplus electricity is transmitted back to grid. Due to the recent expansion of houses with photovoltaic system and the nZEH mandatory by 2025, the rapid increase of distributed generation is expected. Which means, we must prepare for an electricity-power accident and stable electricity supply. Also electricity charges have to be reduce and the grid-connected should be operated efficiently. The introduction of ESS is suggested as a solution, so the analysis of the load matching and grid interaction is required to optimize ESS design. This study analyzed the load matching and grid interaction by expected consumption behavior using actual data measured in one-minute intervals. The experiment was conducted in three nZEH with photovoltaic system, called all-electric houses. LCF (Load Cover Factor), SCF (Supply Cover Factor) and f grid (Grid Interaction Index) were evaluated as an analysis indicator. As a result, LCF, SCF and f grid of A house were 0.25, 0.23 and 0.27 respectively; That of B house were 0.23, 0.23, 0.19, and that of C were 0.20, 0.19, 0.27 respectively.
( Si-eun Jeon ),( Jina Lee ),( Tae-hun Kim ),( Beob-jong Kim ),( Moon-hong Kim ),( Sang-young Ryu ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-
Objective: The purpose of this study is to compare laparoscopic radical hysterectomy (LRH) and abdominal radical hysterectomy (ARH) in the view of the oncologic outcome stratified by risk factors and adjuvant radiotherapy (RT). Methods: Cancer registry database identified 233 patients with FIGO stage IB and IIA invasive cervical cancer with common histology treated with LRH or ARH between January 2008 and December 2016. Exclusion criteria were neoadjuvant chemotherapy, not receiving adjuvant RT for any high-risk factor, and no viable tumor on hysterectomy specimen. Clinicopathologic factors were obtained from the medical chart review. Survival analyses were performed using the Kaplan-Meier method. The log-rank test was used for univariate analyses and the Cox regression model was used for multivariate analyses. Results: Among 233 patients, ARH and LRH were performed in 133 and 100 patients, respectively. One hundred fifty-six patients received adjuvant RT according to risk factors. In total patients, ARH group had a more advanced stage, larger tumor size, and more frequent node metastasis. Among 77 patients of surgery only cohort, 32 patients received ARH and 45 underwent LRH. Age, stage, all intermediate- risk factors, the number of removed lymph nodes were not different between LRH and ARH groups in surgery only cohort. Progression-free survival (PFS) was not statistically different between the two groups (p=0.065). In multivariate analysis, LRH (hazard ratio [HR], 6.2; 95% confidence interval [CI], 1.2-33.3), tumor size (HR, 17.4, CI, 1.4-220.2), lympho-vascular space invasion (HR, 9.0, CI, 1.4-58.9), and stage (HR, 8.2, CI, 1.2-54.7) were independent poor prognostic factor for recurrence in surgery only cohort. PFS and overall survival were not different between ARH and LRH in adjuvant RT cohort. Conclusion: Adjuvant RT may have been masking the inferior oncologic outcome of LRH compared to ARH in several retrospective studies. LRH should be reserved until an ongoing trial result Is published.
주거용 건물 태양광발전시스템의 설치유형에 따른 발전성능 평가
김덕성(Kim, Deok-Sung),김법전(Kim, Beob-Jeon),신우철(Shin U-Cheul) 한국태양에너지학회 2017 한국태양에너지학회 논문집 Vol.37 No.2
The types of installation of the photovoltaic system applied to domestic residential buildings are classified as follows: Mounted modules with air circulation, semi-integrated modules with air duct behind, integrated modules with fully insulated back. In order to study generation characteristics of PV system, we verified the validity of interpretation program based on long-term measurement data of demonstration house installed in BAPV form and also analyzed the generation characteristics and performance of each installation type. The results are as follows. First, the RMSE of amount of generation and simulation according to annual daily insolation of demonstration system located in Daejeon was 0.98kWh and the range of relative error of monthly power generation was -5.8 to 3.1. Second, the average annual PR of mounted modules was 82%, semi-integrated modules 76.1% and integrated modules 71.9%. This differences were attributed to temperature loss. Third, the range of operating temperature of annual hourly photovoltaic modules was –6.5 to 61.0°C for mounted modules, –6.0~73.9°C for semi-integrated modules and –5.5 to 88.9°C for integrated modules. The temperature loss of each installation type was –14.0 to 16.1%, –13.8 to 21.9%, and –13.6 to 28.5%, respectively.