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Proof-of-concept design of a window-integrated passive system
Fatemeh Eftekhar,Nari Yoon,Yeonsook Heo 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This study develops a concept of a window-integrated passive system (WIPS) for single-sided ventilation that enhances the performance of the passive design strategy. The WIPS we designed consists of an inlet and outlet cavities, and openings are placed such that they facilitate an air passage by natural ventilation. As a proof-of-concept study, we conducted CFD simulations to examine the influence of wind- and buoyancy-driven natural ventilation on the system’s performance in winter. The results of the influence of the wind on the building surface showed that the pressure differences when the wind direction is wind from the southeast are much larger than the wind from the northwest. However, a study of the influence of the wind and buoyancy-driven aspects revealed that the value of the volume flow rate with a northwest wind direction is higher than in the southeast wind direction, and more air was ventilated when the wind was from the northwest.
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Proof-of-concept design of a window-integrated passive system
Fatemeh Eftekhar,Nari Yoon,Yeonsook Heo 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This study develops a concept of a window-integrated passive system (WIPS) for single-sided ventilation that enhances the performance of the passive design strategy. The WIPS we designed consists of an inlet and outlet cavities, and openings are placed such that they facilitate an air passage by natural ventilation. As a proof-of-concept study, we conducted CFD simulations to examine the influence of wind- and buoyancy-driven natural ventilation on the system’s performance in winter. The results of the influence of the wind on the building surface showed that the pressure differences when the wind direction is wind from the southeast are much larger than the wind from the northwest. However, a study of the influence of the wind and buoyancy-driven aspects revealed that the value of the volume flow rate with a northwest wind direction is higher than in the southeast wind direction, and more air was ventilated when the wind was from the northwest.
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Proof-of-concept design of a window-integrated passive system
Fatemeh Eftekhar,Nari Yoon,Yeonsook Heo 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This study develops a concept of a window-integrated passive system (WIPS) for single-sided ventilation that enhances the performance of the passive design strategy. The WIPS we designed consists of an inlet and outlet cavities, and openings are placed such that they facilitate an air passage by natural ventilation. As a proof-of-concept study, we conducted CFD simulations to examine the influence of wind- and buoyancy-driven natural ventilation on the system’s performance in winter. The results of the influence of the wind on the building surface showed that the pressure differences when the wind direction is wind from the southeast are much larger than the wind from the northwest. However, a study of the influence of the wind and buoyancy-driven aspects revealed that the value of the volume flow rate with a northwest wind direction is higher than in the southeast wind direction, and more air was ventilated when the wind was from the northwest.
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노지웅(Roh Ji-Woong) 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.1
According to the advancement of computer and simulation method, it becomes possible to predict indoor climate precisely by using CFD simulation coupled with heat conduction, convection, and radiation. However, predicting the indoor climate is generally conducted by using a simplified CFD coupled simulation method since it takes quite long time to use a general CFD simulation method, In this study, a simplified CFD coupled simulation was conducted in order to find out the effect of natural ventilation by wind-driven in atrium. As a result of calculation, it was clarified that the natural ventilation driven by temperature difference was not enough to remove the accumulated heat of upper zone and the natural ventilation by wind-driven was needed. Finally, it is required to decide the window direction and size based on correct indoor climate prediction method for the effective use of natural ventilation by wind-driven.
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건물 자연환기구 개방 면적에 따른 풍량 및 냉방효과 분석
최세영(Choi, Se-Young),최정민(Choi, Jeong-Min) 한국건축친환경설비학회 2018 한국건축친환경설비학회 논문집 Vol.12 No.2
There are various of design techniques to reduce cooling load in building. Among them, the technique to use natural forces to drive outdoor air though a window to a space can be considered as an alternative. It can be divided into the buoyance-driven natural ventilation by indoor and outdoor temperature difference and wind-driven natural ventilation by outdoor wind power. Also, in multi-story building such as the atrium buildings, the air flow rate and temperature distribution of each zone greatly influenced according to opening related architectural design variables. Therefore, this study is carried out on the effect of openable area of outside window, indoor opening and roof opening on natural air ventilation rates and indoor temperatures under the buoyance-driven and wind-driven natural ventilation by using Coolvent program.
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윈드터빈 자연환기 장치의 외기풍속 및 온도차에 따른 환기특성에 관한 실험연구
한동훈(Dong-Hun Han),김영식(Yeong-Sik Kim),정한식(Hanshik Chung),정효민(Hyomin Jeong),최순호(Soon-Ho Choi) 대한설비공학회 2017 설비공학 논문집 Vol.29 No.4
With the improvement of living standards, the ventilation for the mitigation of indoor or outdoor air-pollution problems has recently attracted a lot of attention. Consequently, the ventilation for the supply of outdoor fresh air into a room is treated as an important building-design factor. The ventilation is generally divided into the forced and natural types; here, the former can control the ventilation rate by using mechanical devices, but it has the disadvantages of the equipment costs, maintenance costs, and noise generation, while the latter is applied to most workshops due to the absence of noise and the low installation and maintenance costs. In this experimental study, the ventilation performance of a typical rotating-type natural ventilator, which is called a “wind turbine,” was investigated with the outdoor-wind velocity and the indoor/outdoor-temperature difference. From the experiment results, it was confirmed that the temperature difference of 10℃ corresponds to the ventilation driving force with an outdoor-wind velocity of 1.0 m/s. Additionally, the intake-opening area of a building also exerts a great effect on the ventilation rates.
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여름철 통풍시의 아파트 실내 온열환경에 대한 기초적 연구
장현재(Chang Hyun-Jae) 한국건축친환경설비학회 2008 한국건축친환경설비학회 논문집 Vol.2 No.1
Wind driven ventilation has been used actually to endure high temperature and high humidity in summer, in Korea. If it is insufficient to cool indoor area only with wind driven ventilation, it is hard to sleep in night time and air conditioner has been used. It is considered that weight structure of reinforced concrete, which is usually used for apartment housing in Korea, affect indoor thermal environment in day time and in night time. In this study, indoor thermal environment in an apartment house was measured to understand thermal specificities in summer. As a results, surface temperatures of furniture, ceiling, floor, wall have a small band of temperature change than a band of indoor air temperature change.
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