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사무소 건물의 온열환경 평가를 통한 공조시스템 설계 및 운영방안 개선에 관한 연구
이규남(Rhee, Kyu-Nam),이성재(Lee, Sueng-Jae) 대한건축학회 2014 대한건축학회논문집 Vol.30 No.2
It is one of most important factors to achieve appropriate Indoor Environment Quality (IEQ) in order to enhance occupants’ health and productivity in office buildings. Among various indoor environment factors, it is generally believed that the effect of thermal environment is most significant for the occupants’ comfort and productivity. To provide satisfactory thermal environment, it is general to design HVAC systems which can satisfy indoor environment criteria specified in relevant guidelines or owner’s additional requirement. However, it is often in the design stage that thermal environment criteria is presented insufficiently and owner’s requirements are not specified while the owner demands high level of environmental quality. In this study, thermal environment was assessed for the office building occupied by the owner’s employees in order to derive a design and operation strategies, under the condition that the owner’s requirements for thermal environment are not addressed specifically. The assessment was carried out for the typical office space of headquarter of ‘M’ company in Ulaanbaatar, Mongolia. It is expected that the design and operation strategies to improve thermal environment can be derived by applying the result of this study to new or remodelling projects.
사무소 건물의 HVAC&R 시스템 에너지소비 특성에 대한 연구
조진균(Cho Jin-Kyun),이성재(Lee Sueng-Jae),김진호(Kim Jin-Ho),신승호(Shin Seung-Ho) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.9
HVAC&R(Heating, Ventilation, Air Conditioning & Refrigeration) systems are the most energy consuming building services representing approximately half of the final energy use in the building sector. Despite their significant energy use, there is a lack of a consistent and homogeneous framework to efficiently guide research, mainly due to the complexity and variety of HVAC&R systems but also to insufficient rigour in their energy analysis. This research reviews energy consumptions of HVAC&R systems with the aim of establishing a common idea for the analysis of building energy efficiency. Our approach deals first with the concept of HVAC&R set that is composed of subsystems: HVAC system, heat/coolth generation system and water/air transport system. This study focuses on the equipment and equipment components used to generate heating and cooling. Secondly, the matrix combination evaluation is examined and total 960 HVAC&R sets can be implemented to commercial building. The method as a tool for energy analysis of HVAC&R sets was developed for a unique system energy map. The objectives of this study were to provide a physical understanding of the factors which contribute to energy use by HVAC&R system and provide a baseline estimate of energy use.
조우진(Cho, Woo-Jin),이규남(Rhee, Kyu-Nam),황민규(Hwang, Min-Kyu),김영탁(Kim, Young-Tag),이성재(Lee, Sueng-Jae),차지형(Cha, Ji-Hyoung) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.11
Surface condensation on the windows is liable to occur if the indoor humidity is increased due to occupants’ activity, perspiration and so on. The ventilation system, which is installed for the purpose of supplying fresh air and exhausting contaminated air, can be utilized to prevent surface condensation by decreasing indoor humidity. Although the condensation can be definitely prevented by operating the ventilation system continuously, it is common that the ventilation system is not operated due to the concern about electricity charges. In the previous study by this research team, the ventilation system was developed which can prevent over-humidification by discharging indoor humidity only if the minimum surface temperature of the window becomes lower than dew point temperature. In this study, the developed ventilation system was installed in the residential building in order to evaluate the performance of preventing condensation and energy consumption. In addition, temperature difference ratio of the window and minimum operation time of the system, which are required for the optimum operation of the ventilation system, were suggested. The results of the experiment shows that the developed ventilation system can prevent the surface condensation with the less energy consumption (14∼35%) than when the conventional ventilation system is operated continuously.
동절기 실내 과습방지를 위한 자동환기시스템 제어장치 개발에 관한 연구
김영탁(Kim, Young-Tag),조우진(Cho, Woo-Jin),이규남(Rhee, Kyu-Nam),황민규(Hwang, Min-Kyu),이성재(Lee, Sueng-Jae),차지형(Cha, Ji-Hyoung) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.11
The surface condensation in winter season can be prevented with two methods. The first method is increasing surface temperature of space envelopes with insulation and the second method is decreasing indoor vapor pressure with ventilation. But additional insulation after construction completion is not easy. So, ventilation is more suitable to solve condensation problems. Generally, there are two types of ventilation methods in residential buildings. One is natural ventilation by opening windows, but the efficiency defends on occupant’s action whether they open the windows or not. The other is mechanical ventilation by recovery ventilator(air-to-air heat exchanger). This can provide not only regular ventilation but also high air quality and less condensation problems, if it can be controlled automatically. Therefore, it is necessary to develop automatic control device of ventilation system for preventing condensation with decreasing indoor vapor pressure. To achieve it, this paper suggests CPA(Condensation Preventing Algorithm) for the auto-control device of ventilation system.