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위성혁(Sung-Hyeok Wi),유준열(Jun-Yeol Ryu),홍정표(Jung-Pyo Hong) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
Since the motor for EPS(Electric Power Steering) is an automobile part involved in wheel operation, it is necessary to consider the mechanical response as well as the electrical performance in design stage. Electrical and mechanical performance can be estimated by using both analytical method and finite element method. However, finite element method has the disadvantage such as hard preprocessing and long analysis time. Therefore, in this paper, it is aimed to estimate the electromechanical parameters through mathematical modeling and to improve the mechanical response efficiently by using the voltage equation and the motion equation with the simulink block model. In addition, the speed controller is designed to improve mechanical response. Finally, the mechanical response results of the base model and the improved model are compared through finite element method.
문헌고찰을 통한 태양광/열 복합 시스템의 유형별 성능특성 비교
김진희(Kim Jin-Hee),김준태(Kim Jun-Tae) 한국건축친환경설비학회 2007 한국건축친환경설비학회 논문집 Vol.1 No.2
PV/Thermal combined system is a solar energy device that uses photovoltaic module as thermal absorption plate, producing thermal energy as well as electricity which can be utilized in buildings. The system removes heat from PV module through air or liquid and its efficiency will vary dependant on the thermal medium. The heat as the forms of hot air or hot water can be utilized for building use, like space heating and hot water. This study describes the performance of flat plate PVT collectors through literature reviews. It classified PVT collectors by air type and liquid type, and analyzed the thermal and electrical performance of PVT collectors.
이충근(Chung Geun Lee),신우균(Woo Gyun Shin),임종록(Jong Rok Lim),주영철(Young Chul Ju),황혜미(Hye Mi Hwang),고석환(Suk Whan Ko),장효식(Hyo Sik Chang),강기환(Gi Hwan Kang) 한국신재생에너지학회 2020 신재생에너지 Vol.16 No.4
Soiling on the surface of a PV module reduces the amount of light reaching the solar cells, decreasing power performance. The performance of the PV module is generally restored after contaminants on the module surface are washed away by rain, but it accumulates at the bottom of the module owing to the thickness of the module frame, causing an output mismatch on the PV module. Since PV modules are usually installed horizontally or vertically outdoors, soiling can occur at the bottom of the PV module, depending on the installation direction due to external environmental factors. This paper is analyzed the output characteristics of a PV module considering its installation direction and the soiling area. The soiling was simulated to use transparent films with 5% transmittance, and the transmission film was attached to the bottom part of the PV module horizontally and vertically. When the soiling area was 33% of the string at the bottom of the PV module, the power output decreased similarly regardless of installation direction. However, when the soiling area was 66% of the string at the bottom of the PV module, it was confirmed that the output performance decreased sharply when installed vertically rather than horizontally.