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제로에너지 건축물 인증 의무화가 공동주택 단위 냉난방 부하에 미치는 영향 분석
최슬건(Sul Geon Choi),조홍재(Hong Jae Cho) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This study aimed to review the appropriate cooling and heating load per unit area of multi-family housing based on the enhanced thermal insulation performance of current design standard for energy conversion and zero energy building certification. A theoretical reference building model for multi-family housing was selected by extracting national statistical data and design drawings data to calculate cooling and heating load. Multi-family housing size were classified into three groups: 60㎡ or less, 60~85㎡ or more. As a result, since the cooling load per unit area does not have existing legal standards, it is difficult to quantitatively compare the reduction of cooling load per unit area. On the other hand, it was found that 35% reduction of heating load per unit area was possible when applying design standard for energy conversion, and 56.1% load reduction was possible when applying the ZEB.
사막기후 스마트팜 적용 냉방패키지시스템의 냉방효과 비교분석
최슬건(Sul Geon Choi),황동곤(Dong Kon Hwang),박두용(Doo Yong Park) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.12
The purpose of this study was to shorten the uncultivated period from about 5-6 months to 2 to 3 months. The uncultivated period of 5-6 months was due to midday temperature in the UAE soaring up to 47℃ and the high solar radiation causing problems in crop cultivation. This study intended to compare the effect of reducing high temperature and cooling load of greenhouse through simulation with covering material, external shading, and fan & pad evaporative cooling system to be applied to the UAE smart farm and use it to select equipment capacity such as chiller and cold storage tank. The average indoor illuminance and the peak cooling load were compared according to the type of covering material and the shading rate. When a fan & pad system was applied, the peak cooling load was reduced by 42.9% or 69.4% compared to the typical glass greenhouse (case 1) when the fan & pad system efficiency was 60% or 80%, respectively. It is expected to reduce the capacity of equipment for heat sources such as chiller and cold storage as much as the peak cooling load reduction.
VAV시스템 제어전략에 따른 에너지성능 및 실내 환경 평가 연구
최슬건(Choi, Sul-Geon),전종욱(Jeon, Jong-Ug),김강수(Kim, Kang-Soo) 한국건축친환경설비학회 2018 한국건축친환경설비학회 논문집 Vol.12 No.2
The purpose of this study is to compare the energy consumption characteristics and the indoor environment according to the control method of VAV system, and to provide basic data about the control method for energy saving and comfortable indoor environment. In this study, five types of VAV control methods are applied to general office building. The control methods included VAV terminal box minimum air flow control (Single/Dual Maximum Control Logic), Supply Air Temperature Reset control, DCV-CO₂ (Demand Controlled Ventilation), and Optimal Start control, and energy consumption and indoor environment of buildings were analyzed. The analysis program was EnergyPlus 8.8. Dual maximum control logic is the most advantageous in terms of energy consumption and thermal environment than other control strategies, but it has the most disadvantage in terms of indoor air quality. Dual Maximum Control Logic + DCV-CO₂, on the other hand, was advantageous in terms of indoor environment, but reduced energy consumption savings when compared with Dual Maximum Control Logic. Combining DCV-CO₂, SAT Reset control and Optimal Start control with Dual Maximum Control Logic reduce energy consumption by 29.3% when compared to CAV.
제로에너지빌딩 인증으로 인한 아파트 열원 선정 영향 분석에 관한 연구
최슬건(Sul Geon Choi),박두용(Doo Yong Park) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.6
The purpose of this study is to analyze the effect of zero energy building certification, which will be implemented in apartment housing as from 2025, on the selection of heat sources for apartments. The capacity, area, and initial investment cost of each renewable energy were analyzed according to the heat source in order to meet energy self-sufficiency rate of 20%, which is required for zero energy building certification. In order to produce energy that meets self-sufficiency rate of 20%, electricity as well as heat energy must be produced and apartment heating systems must be converted from individual to central supply heating. The photovoltaic system is easier compared to other systems in terms of utilization and energy distribution. However, this system requires significant installation area and is limited by various other factors, such as, location, direction, and surrounding environment. The ground source heat pump of the photovoltaic system has the smallest initial investment cost compared to other renewable energy systems, but in order to use heat energy it must be supplied to the central supply heating. Besides, fuel cells have the smallest capacity and installation area, but are not subsidized and represent the highest initial investment cost.
제로에너지 건축물 인증 의무화가 공동주택 단위 냉난방 부하에 미치는 영향 분석
최슬건(Sul Geon Choi),조홍재(Hong Jae Cho) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This study aimed to review the appropriate cooling and heating load per unit area of multi-family housing based on the enhanced thermal insulation performance of current design standard for energy conversion and zero energy building certification. A theoretical reference building model for multi-family housing was selected by extracting national statistical data and design drawings data to calculate cooling and heating load. Multi-family housing size were classified into three groups: 60㎡ or less, 60~85㎡ or more. As a result, since the cooling load per unit area does not have existing legal standards, it is difficult to quantitatively compare the reduction of cooling load per unit area. On the other hand, it was found that 35% reduction of heating load per unit area was possible when applying design standard for energy conversion, and 56.1% load reduction was possible when applying the ZEB.