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곽인규 한국항해항만학회 2018 한국항해항만학회 학술대회논문집 Vol.2018 No.추계
국내 연안에 설치된 항로표지(등부표,등대 등) 대부분이 철근 콘크리트 형식으로 제작 설치 되어 있다. 초기 구조물 제작시 파손및 전단, 염해에의 한 콘크리트의 부식에 대한 인식 부족으로 일반적인 색상표시 도장방식으로 마감처리 하여 설치 하였다. 이로 인하여 콘크 리트의 파손, 도장부의 탈락으로 인하여 매년 유지보수비용이 투입되고 있는 실정이다. 또한 부식진행 후 현장여건상 보수도장이 취약하고 보수 후에도 내구성 부족(방오수명 2년~3년)으로 지속적인 관리가 필요하다. 그러므로 항로표지의 신규 설치시 강관조 형식의 설계적용이 요구되며 강관조의 가장 큰 취약점인 부식(녹)에 대한 방오방법의 연구가 지속적으로 진행되고 있다. 또한 기 설치된 해상 금속구조물의 경우 보수작업시 장비반입, 작업시간, 작업여건 등이 비말대, 간만대에 따라 변동 하므로 원칙적인 보수가 불가능한 상황에 있다. 그러므로 초기 제작시 부식에 대한 방오도장이 시행 되어야 한다. 기 설치된 콘크리트 구조물 등표는 원칙적인 구조보강 검토 후 염해, 중성화 방지 도장을 시행 하여야 하며 이에 대한 연구를 진행하고 있다.
반고정식 PV 시스템의 운영 스케줄 도출 및 그에 따른 발전 효율 변화 고찰
곽인규,문선혜,허정호 한국태양에너지학회 2017 한국태양에너지학회 논문집 Vol.37 No.6
The amount of solar irradiation obtained by a photovoltaic (PV) solar panel is the major factor determining the power generated by a PV system, and the array tilt angle is critical for maximizing panel radiation acquisition. There are three types of PV systems based on the manner of setting the array tilt angle: fixed, semi-fixed, and tracking systems. A fixed system cannot respond to seasonal solar altitude angle changes, and therefore cannot absorb the maximum available solar radiation. The tracking system continually adjusts the tilt angle to absorb the maximum available radiation, but requires additional cost for equipment, installation, operation, and maintenance. The semi-fixed system is only adjusted periodically (usually seasonally) to obtain more energy than a fixed system at an overall cost that is less than a tracking system. To maximize semi-fixed system efficiency, determining the optimal tilt angle adjustment schedule are required. In this research, we conducted a simulation to derive an optimal operation schedule for a semi-fixed system in Seoul, Korea (latitude 37.5˚). We implemented a solar radiation acquisition model and PV genereation model on MATLAB. The optimal operation schedule was derived by changing the number of tilt angle adjustments throughout a year using a Dynamic Algorithm. The results show that adjusting the tilt angle 4 times a year was the most appropriate. and then, generation amount of PV system increased 2.80% compared with the fixed system. This corresponds to 99% compared to daily adjustment m
곽인규(Kwak, In-Kyu),문선혜(Mun, Sun-Hye),허정호(Huh, Jung-Ho) 대한건축학회 2018 大韓建築學會論文集 : 構造系 Vol.34 No.7
Semi-transparent Photovoltaics (STPV) works as an exterior material replacing windows as well as functioning as a electricity generator. As a result, it also affects the building"s heating, cooling and lighting loads. In this study, we used the concept of Net Electricity Benefit(NEB) to conduct a parametric analysis of building energy impact of STPV. The NEB of STPV is from –1 kWh/m² to 6 kWh/m². Since NEB represents the amount of energy increase or decrease when STPV is applied compared to the standard window, a value of 0 or less means that the demand for building energy can be increased rather than applying a general window having high thermal performance and high visible light transmittance value. Therefore, it is necessary to perform a comprehensive performance evaluation considering both the performance evaluation based on the existing power generation performance and the influence on the building energy.
반투광형 BIPV 의 건물 에너지 성능에 대한 파라메트릭 분석
곽인규(Kwak, In-Kyu),김경현(Kim, Gyeong-Hyeon),문선혜(Mun, Sun-Hye),허정호(Huh, Jung-Ho) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
Semi-Transparent PV works as an exterior material replacing windows, in addition to its function as a generator. As a result, it also affects the building’s heating, cooling and lighting loads. In this study, we evaluated the building energy performance considering the building energy effect factors and generating factors of the semi-transparent BIPV. As a result, the energy saving effect of the semi-transparent BIPV is -1 ~ 10 ㎾h/㎡·yr ,Respectively. However, in some conditions, It was found that building energy demand can be increased rather than applying the general window with high thermal performance and high visible transmittance value. Therefore, it is necessary to perform a comprehensive performance evaluation considering both the performance evaluation based on the existing power generation performance and the influence on the building energy.
상업지역내 건물 사이 공간에 설치된 실외기 주변 열 환경 분석
신학종,곽인규,문선혜,허정호 한국태양에너지학회 2019 한국태양에너지학회 논문집 Vol.39 No.3
In commercial areas, outdoor units are typically installed close to one another in the narrow space between buildings due to insufficient regulations. This makes it difficult to ventilate the discharge airflow, which may lead to deterioration of the performance of outdoor units. This study conducted CFD simulation to analyze the thermal environment according to the installation distance of the outdoor unit. The outdoor unit was installed in the space between buildings, and the thermal environment was analyzed by changing installation distance and wind speed. The performance of the outdoor unit was evaluated by measuring the on-coil temperature. The results show that the closer the distance between outdoor units, the higher the condenser on-coil temperature. Also, the on-coil temperature appeared to rise dramatically at lower wind speed.
문선혜,곽인규,박광일,허정호 한국건축친환경설비학회 2018 한국건축친환경설비학회 논문집 Vol.12 No.1
The purpose of this study is to analyze the air conditioner (AC) use behavior of occupants based on monitoring data. The indoor temperature and humidity, the occupancy state, and the infrared signal of the AC remote control of 4 households were collected. Using the above data, specific user behavior (on/off, set-temperature, air volume, etc. adjustment) was determined. The collected information on the AC use was divided into three categories based on the occupancy state; entering, leaving, and staying. The probability of turning on and off on the AC according to the DI (discomfort index) while staying the room was also analyzed. The result of this study is significant for future research on predicting the energy consumption propensity of the residents and for developing on AC use model based on user behavior.
거주자의 계절별 위생활동 변화와 연간 온수 소비량 예측
박광일(Park, Kwang-Il),곽인규(Kwak, In-Kyu),문선혜(Mun, Sun-hye),허정호(Huh, Jung-Ho) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
In order to calculate the energy consumption through the exact implementation of the simulation and the equation, the behavior of the resident should be reflected. Domestic hot water consumption energy is generated for residents’ hygiene. Hygiene activities have shower wash dishes. The temperature and frequency of water used in hygiene activities varies seasonally. For accurate calculation of annual domestic hot water consumption, it is necessary to accurately consider changes in temperature and frequency of water used for each season. To predict the usage of domestic hot water, this paper measured the temperature and frequency on use related to sanitary activities and analyzed seasonal changes.
거주자 위생활동 특성의 계절적 변화가 급탕 에너지 소비량에 미치는 영향
박광일(Park, Kwang-il),곽인규(Kwak, In-Gyu),문선혜(Mun, Sun-Hye),허정호(Huh, Jung-Ho) 대한건축학회 2018 大韓建築學會論文集 : 構造系 Vol.34 No.5
The purpose of this study was to analyze the effect of seasonal change in characteristics of hygiene activity on domestic hot water energy consumption. With 16 residents of 4 households, the data about frequency of hygiene activity and water temperature was collected from February to August, 2017.The results of collected data discovered that the frequency of hygiene activity was higher especially in summer, whereas the consumption of warm water they used was higher in winter. The seasonal change in characteristics of hygiene activity was analyzed to be changed and strongly influenced by outdoor temperature .The influence of characteristics of hygiene activity on hot water consumption was analyzed. There was 13% of difference between consumption that was calculated taking characteristics of hygiene activity into account and consumption that was not. Therefore, this study suggested hygiene activity schedule, hot water profile and hot water consumption pattern, which can be utilized for improving simulation as well.