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변수영(Byun Soo-Young),정민희(Chung Min-Hee),박진철(Park Jin-Chul),이언구(Rhee Eon-Ku) 대한건축학회 2010 대한건축학회논문집 Vol.26 No.6
In this paper, influencing factors which affect the decision for the application of hybrid renewable energy systems. The relative importance of the factors was calculated using the Analytic Hierarchy Process(AHP) method and Likeret Scales in order to evaluate alternatives for selecting hybrid renewable energy systems. The questionnaires were administered to the groups bracketed into for professional fields; research, design, engineering, policy-making. The result indicates that the most important criteria is the economic efficiency, and the most important sub-criteria is maintenance expenses. This study will be able to provide the basic data on selecting the optimal alternative for hybrid application of renewable energy systems.
막가습기와 공기극 재순환을 사용한 고분자 전해질 연료전지의 가습특성 해석
변수영(Su Young Byun),김범준(Beom Jun Kim),김민수(Min Soo Kim) 대한기계학회 2011 大韓機械學會論文集B Vol.35 No.4
고분자 전해질막 연료전지에서 공급 기체의 가습은 연료전지의 효율과 수명 향상 측면에서 필수적이다. 기존의 고분자 전해질막 연료전지의 가습 방법으로 물 분사나 막가습기, 엔탈피 휠 등이 사용되었다. 하지만, 이러한 외부 가습 방법은 시스템 부피를 크게 하고 고출력 구간에서 가습량이 부족한 단점이 있다. 가습 장치의 효율과 전체 연료전지 시스템 효율을 높이려면, 연료전지의 고온다습한 배출기체로부터 열과 수분을 회수할 필요가 있다. 본 연구에서는 연료전지의 고온다습한 배출공기를 재순환하여 공급공기를 1 차로 가습하고 소형의 막가습기로 2 차 가습하는 복합가습에 대한 해석적 연구를 수행하였다. 그리고 최적의 가습 시스템 설계를 위한 새로운 방법을 제안하였다. The humidification of reactant gases is crucial for efficiently operating PEM (polymer electrolyte membrane) fuel cell systems and for improving the durability of these systems. The recycle of the energy and water vapor of exhaust gas improves the system performance especially in the case of automotive application. The available humidification methods are steam injection, nozzle spray, humidification by enthalpy wheel, membrane humidifier, etc. However, these methods do not satisfy certain requirements such as compact design, efficient operation and control. In this study, a hybrid humidification system consisting of a membrane humidifier and exhaust-air recirculation units was developed and the humidification performance of this hybrid humidifier was analyzed. Finally, a new practical method for optimal design of PEM?fuel-cell humidification system is proposed.
쇼핑의 편의성 증진을 위한 오프라인 매장 전용 모바일 앱 서비스 제안 : 올리브영 매장을 중심으로
윤영서(Young-seo Yoon),김정윤(Jeong-yoon Kim),변수영(Su-young Byun),윤지수(Ji-soo Yoon) 한국HCI학회 2024 한국HCI학회 학술대회 Vol.2024 No.1
올리브영은 현재 높은 인지도와 매출 이익을 기록하고 있지만, 오프라인 매장 이용 고객의 불편사항은 꾸준히 존재하는 실정이다. 이를 해결하기 위해 본 연구는 설문조사와 인터뷰를 바탕으로 상품 관리 및 고객 안내 측면에서 발생하는 문제점을 확인한다. 이를 토대로 고객이 원하는 상품을 전자적인 형태의 장바구니로 담는 모바일 장바구니 앱 서비스를 제안한다.
제로에너지건축물 인증을 고려한 데이터센터의 최적 지역 선정 연구
이도형(Lee, Do-Hyung),변수영(Byun, Soo-Young) 한국건축친환경설비학회 2021 한국건축친환경설비학회 논문집 Vol.15 No.4
Using the building energy efficiency rating evaluation program, this study analyzed the optimal region in terms of energy independence rate of data centers in 66 regions in Korea. Pyeongchang has the most advantageous energy consumption and Changwon has the most disadvantageous analysis, which is believed to have a greater impact on ambient air temperature than solar radiation. A 19.53% difference occurred as Pyeongchang was the most advantageous with an energy independence rate of 67.76%, and Jeju was the most unfavorable with an energy independence rate of 48.23%. In addition, Pyeongchang is the only one among all regions to be able to acquire building energy efficiency rate for grades 1<SUP>+++</SUP>. The smaller the primary energy consumption per unit area, the more advantageous it is to energy independence rate, so it is believed that the data center should consider selecting optimal areas, optimal heat sources, and equipment placement considering ambient temperature.
소규모 근린생활시설의 그린리모델링을 통한 에너지성능 개선 효과 분석
이도형(Lee, Do-Hyung),변수영(Byun, Soo-Young),원종연(Won, Jong-Yeon),최동호(Choi, Dong-Ho) 한국건축친환경설비학회 2021 한국건축친환경설비학회 논문집 Vol.15 No.5
This study analyzed the effects of green remodeling in the consideration of zero-energy building certification on small neighborhood facilities that were completed over 30 years ago. The result of the first energy demand analysis showed 56.8% reduction from 207.0 kWh/㎡·yr before green remodeling to 89.5 kWh/㎡·yr after green remodeling. It was also determined that carbon dioxide emissions would be reduced by 56.7%. For green remodeling of economic zero-energy buildings, the dependence on new and renewable energy should be reduced by minimizing primary energy consumption. This can minimize the burden of energy production if energy consumption decreases. In order to avoid planning to install a PV system indiscriminately, the adequacy review must be preceded by a sunshine simulation analysis. In the future, it is expected that research will be conducted to analyze the effectiveness of technology elements for energy improvement in buildings in the future and the findings will be used to inform building owners implementing green remodeling.
제로에너지건축 조기도입에 따른 공동주택의 제로에너지건축물 인증 확보 예측에 관한 연구
옹드람(Munkhbat, Undram),변수영(Byun, Soo-Young),이도형(Lee, Do-Hyung) 한국건축친환경설비학회 2021 한국건축친환경설비학회 논문집 Vol.15 No.4
In this study, the possibility of achieving a zero-energy building certification was analyzed when installing a PV module on the roof of an apartment complex at the current energy performance level in order to prepare a countermeasure to achieve a zero-energy building through minimal additional planning. The energy performance of the current new apartment complexes was found to correspond to the 1~1+ grade. Based on the current status analysis results, standard models were developed, and the error rate was found to be within 5%. In order to achieve the ZEB5 class, it is found that 0.011~0.014 kWp/㎡ for a district heating apartment and 0.021~0.023 kWp/㎡ for an individual heating apartment is necessary. When examined compared to the rooftop area, in the case of a district heating apartment, it could sufficiently achieve the ZEB5 class by installing a PV module on the roof. However, in the case of an individual heating apartment, more than 68% of the rooftop area needs to be installed, and it is necessary to preferentially lower the primary energy consumption through strengthening the building performance.
정상상태 3차원 열전달해석 프로그램을 활용한 복도식 공동주택의 단열 및 복도공간 개선에 따른 열손실량 분석
이도형(Lee, Do-Hyung),원종연(Won, Jong-Yeon),변수영(Byun, Soo-Young) 한국건축친환경설비학회 2020 한국건축친환경설비학회 논문집 Vol.14 No.6
As of 2019, the amount of energy used in apartments accounts for the largest portion of residential buildings, accounting for 59 percent. Due to the desperate need for energy saving efforts in apartments, this study used a steady state three-dimensional heat transfer analysis program to compare the temperature distribution and the amount of heat loss depending on the insulation conditions of apartments. The effect of temperature improvement in the proposal plan of creating a thermal buffer space in the corridor compared to the original plan, which is an apartment with internal insulation but does not have continuous insulation between generations and corridors, was shown to be significant. In terms of heat loss, it was also shown that the proposal plan was significantly reduced.
김범준(Beom Jun Kim),김성일(Sung Il Kim),변수영(Su Young Byun),김민수(Min Soo Kim),김현유(Hyun Yoo Kim),권혁률(Hyuck Ryul Kwon) 대한기계학회 2010 大韓機械學會論文集B Vol.34 No.5
연료전지 자동차는 성능과 수명 측면에서, 전해질막의 가습이 필요하며, 이를 위해 반응기체인 공기, 수소의 높은 가습이 요구된다. 본 연구에서는 내경 75 ㎜공기공급관 내에 직접 삽입된 인젝터(노즐)과 액적제거를 위한 사이클론을 통한 가습장치를 고안하여 실험을 수행하였다. 충돌형 노즐 3 종류를 이용하여 분사압력, 공기 유량, 분사방향각도를 달리하여 실험을 수행하였다. 가습 성능을 분석하기 위해, 가습효율이라는 개념을 정의하였다. 별도의 외부 열공급원 없이 분사되는 물과 공기의 엔탈피가 자체 기화열 공급원으로, 분사되는 물의 양이 가습에 가장 중요한 변수임을 볼 수 있었다. 사이클론은 높은 공기유량에서 재비산이 발생되는 것을 볼 수 있었다. 노즐타입 PJ24, 분사방향 각도 90도, 분사압력 1200 ㎪, 공기 유량 6000 nlpm에서 절대습도 21.29 kJ/㎏da , 가습 효율 86.57%를 얻을 수 있었다. Humidification of PEM fuel cells is necessary for enhancing their performance and lifetime. In this study, a humidification system was designed and tested; the system includes an air-supply tube (inner diameter: 75 ㎜) through which a nozzle can be directly inserted and a cyclonic separator for the removal of water droplets. Three types of nozzles were employed to study the influence of injection pressure, air flow rate, and spray direction on the humidification performance. To evaluate the humidification performance, the concept of humidification efficiency was defined. In the absence of an external heat source, latent heat for evaporation will be supplied by the own enthalpies of water and air. Thus, the amount of water sprayed from the nozzle is the most critical factor affecting the humidification efficiency. Water droplets were efficiently removed by a cyclonic separator, but re-entrainment occurred at high air flow rates. The absolute humidity and humidification efficiency were 21.29 kJ/㎏da and 86.57%, respectively, under the following conditions: nozzle type PJ24; spray direction angle 90°; injection pressure 1200 ㎪; air flow rate 6000 Nlpm.