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송종의(Song Jong-Eui),임현우(Lim Hyun-Woo),이준호(Lee Jun-Ho),이중훈(Lee Joong-Hoon),송두삼(Song Doo-Sam) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(계획계)
Super tall building has many advantages but also has some problems such as stack effect. Stack Effect is a general phenomenon that arouse in a building. However, the building height is higher and higher, a lot of air flow into building and moved to the upper part of the building and cause a variety of problems. On the while, many super tall buildings were made and planned in the world and korea in these days. So we need to understand the stack effect in super tall buildings and make a counter measures to mitigate the stack effect. The purpose of this study is to grasp the characteristics of stack effect in super tall building through numerical simulation. In this paper, the characteristics of stack effect for super tall building(100 floors) are compared to those of high-rise building(43 floors). Moreover, the wind effect on stack effect will be analyzed.
노후 학교 건물의 외피 교체의 적정성 검토-냉방부하 증가 원인의 분석
이예지(Ye Ji Lee),송두삼(Doo Sam Song) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
The purpose of this study is to analyze the heating and cooling energy demand according to the thermal performance changes in building envelope by retrofits. Previous study’s result showed that the annual total energy consumption decreased as the envelope thermal resistance improved, but the cooling energy use increased when window and wall is replaced with latest standard. This is because the high internal heat gain level of the school buildings and the internal heat cannot escape through window and wall when the envelope thermal performance is improved. In order to verify this assumption, the changes of thermal performance according to the envelope changes were analyzed by simulation. As a result, the cooling load increased with the improvement of the thermal performance of building envelope in old school buildings because of the higher internal heat generation level in school buildings.
수정된 난방도일을 이용한 에너지절약 건축물 설계기준의 국내 지역구분 제안
박소민(So Min Park),송두삼(Doo Sam Song) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
As climatic zones are applied in diverse energy-related regulations, many countries provide their own climatic zones considering climatic conditions. Korea is divided into three climatic zones under building insulation standard of Energy Saving Design Standard for Building. Most countries with climatic zones have their own criteria for climate division. Degree-days are mainly used in classification of climate zone, and other weather data such as relative humidity or precipitation are used for secondary classification. However, there are no clear documents that state criteria for Korean climatic division despite its related regulations. In the previous studies on calculation of regional heating degree-days in Korea, it showed no consistency with current three climatic zones, which they should be. This doubtful inconsistency proved that current building insulation standard is misclassified, and needed revision. In this study, a new climatic zones for Korea is proposed using revised heating degree-days.
코로나 바이러스(COVID-19) 공기 감염방지를 위한 실내 환기성능 지표로 CO₂ 적정 농도의 제안
박소우(Sowoo Park),송두삼(Doo Sam Song) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
Aerosols smaller than 5 μm in diameter are believed to play an important role in SARS-CoV-2 transmission and indoor infection. The Wells-Riley model widely used to estimate the probability of infection in indoor requires the measurement of ventilation rate or air change rate. There are many method to calculate the ventilation rate by measurement. However, these method has limitations in actual occupancy conditions. The aims of this study is to propose the ventilation performance control method for the prevention of COVID-19 infection indoors. In this study, based on the Wells-Riley model, a method for deriving an CO₂ concentration threshold for the prevention of SARS-CoV-2 airborne transmission through CO₂ monitoring in actual conditions was proposed. This methodology included the effect of virus deposition and viral inactivation. As a result, as the exposure time and number of occupants increase, the mean CO₂ concentration threshold increases, and deposition rate and viral inactivation increase the mean CO₂ concentration threshold. The mean concentration thresholds in school classrooms, restaurants, supermarkets and offices were 904, 763, 688, and 588 ppm, respectively.
차압 측정을 통한 공동주택 기밀성능 예측방법의 제안 및 신뢰성 분석
박승환(Seung Hwan Park),송두삼(Doo Sam Song) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
This study propose a method of predicting the airtightness performance by using the pressure difference, which can replace the conventional blower door test method that can measure the airtightness performance. In order to verify the proposed method in this study, the predicted results were compared to the measured results using blower door test. The proposed method is similar to the blower door test, but there are some differences. This study measured the pressure difference in the front door and the building envelope, which can be easily measured, and calculated the airflow that pass to the building envelope based on the airflow at various pressure difference conditions shown in the airtightness report of the front door. This is possible because the amount of air flowing in and out under steady state conditions is always the same. Based on this, the airflow was calculated at several pressure difference conditions in the building envelope, and C and n were defined. With this, it is possible to calculate the airtightness performance in various pressure difference conditions. In order to verify the proposed method, this study measures the pressure difference and the airtightness performance in the building using the blower door test. The results are as follows; the value of C, n was calculated using the proposed method, and C was about 19.4 and n was about 0.895. The airtightness performance was predicted to be 3.25 (1/h@50 Pa). When the measured and predicted results were compared, there was no significant difference.