• 제목/요약/키워드: Air stack effect

검색결과 106건 처리시간 0.025초

Evaluation of the Impacts of Stack Effect in High-Rise Buildings

  • Yang, In-Ho;Jo, Jae-Hun;Yeo, Myoung-Souk;Kim, Kwang-Woo
    • International Journal of Air-Conditioning and Refrigeration
    • /
    • 제11권2호
    • /
    • pp.91-103
    • /
    • 2003
  • The objective of this study is to analyze and evaluate the impact of the stack effect in high-rise buildings for solving the various problems resulting from it. For the evaluation of the impacts on the stack effect, computer program simulations based on the network model were performed for a typical high-rise office building. The results of the simulations show that the impact caused by the stack effect is mainly dependent on building envelope air-tightness and internal air flow resistance. Therefore the problems due to the stack effect may be solved to some extent by installing vestibules around entrance doors and doors serving elevators, and by zoning the elevators.

건축물 계단에서의 연돌효과 저감방안에 대한 3차원 수치해석 연구 (Study on 3D Numerical Analysis of Stack Effect Reduction in Stairwell of Building)

  • 김정엽;김지석
    • 설비공학논문집
    • /
    • 제27권3호
    • /
    • pp.152-157
    • /
    • 2015
  • Stack effect on high-rise building have negative effect on living environment, energy and life-safety aspect. Thus, it's necessary to find the measure to reduce the stack effect. As a result of field test on a 31-story building, a circulating type stack effect reduction technology was developed, which supplies air in the low stairs and discharges air in the high stairs. To evaluate the performance of this circulating type stack effect reduction technology on building stairs, a 3D numerical analysis was carried out by using Momentum Loss Model for analyzing leakage flow between compartments in a building. Consequently, numerical analysis proved that the stack effect on building stairs was reduced by a circulating type stack effect reduction technology.

고층형 주거건물의 연돌효과에 의한 공기 및 오염물질 이동에 관한 연구 (A study on the contaminant dispersion by stack effect in high-rise residential building)

  • 이준호;이중훈;송두삼
    • KIEAE Journal
    • /
    • 제10권3호
    • /
    • pp.97-102
    • /
    • 2010
  • With the building is higher and higher, the stack effect is more and more remarkable. The stack effect accompanies many problems in high-rise building such as draft, troublesome in door opening, uncomfortable noise, contaminants dispersion, etc. In this study, the air movement and accompanied contaminants dispersion by stack effect in high-rise building, and diluting the contaminants concentration were analyzed. The analysis was performed for high-rise residential building in Seoul, Korea and the network simulation method was used. The results show that the indoor contaminants concentration and air movement caused by stack effect have interdependent relationship.

고층건물에서의 연돌효과 시뮬레이션 (Simulation of the Stack Effect in High-Rise Builbings)

  • 양인호;여명석;조재훈;김광우
    • 설비공학논문집
    • /
    • 제14권6호
    • /
    • pp.456-467
    • /
    • 2002
  • The objective of this study is to analyze and evaluate the impact of the stack effect in high-rise buildings for solving the various problems resulting from it. For the evaluation of the impact of the stack effect, computer program simulations based on the network model were performed for a typical high-rise office building. The results of the simulations show that the impact caused by the stack effect is mainly dependent on building envelope air-tightness and internal airflow resistance, so the problems due to the stack effect may be solved to some extent by installing vestibules around entrance doors and doors serving elevators, and by zoning the elevators.

E/V Shaft Cooling Method as a Stack Effect Countermeasure in Tall Buildings

  • Lee, Joonghoon;Song, Doosam;Jeong, Eunyoung
    • 국제초고층학회논문집
    • /
    • 제1권2호
    • /
    • pp.99-105
    • /
    • 2012
  • The higher the building height and the larger the temperature difference between the outdoor and indoor space, the more remarkable is the draft driven by the stack effect in high-rise buildings. Moreover, the stack effect can bring about the deterioration of habitability and the degradation of the performance of the indoor control system in high-rise buildings. In this study, as a measure to attenuate the stack effect, the E/V shaft cooling method was proposed and its performance was compared with the conventional stack effect control method for strengthening the air-tightness of the building using a numerical simulation method. The total decreasing ratios on the stack effect in a building were compared, and the probabilities of the secondary problems were analyzed. The results show that the E/V shaft cooling is very effective to decrease the stack effect in a high-rise building in terms of the reduction performance and application. Moreover, this method does not cause secondary problems, such as stack pressure transition to other walls, unlike the conventional stack effect mitigation method.

고층건축물의 피난경로 가압제연시스템 성능개선대책에 관한 연구 (A Study on Performance Improvement Measures of Pressurized Smoke Control Systems for Exit Passageways of High-Rise Buildings)

  • 손봉세;김진수
    • 설비공학논문집
    • /
    • 제21권12호
    • /
    • pp.703-714
    • /
    • 2009
  • One of the biggest problems in smoke control systems for high-rise buildings is stack effect, but there are no recognized methods or measures to solve the problem of stack effect as yet. The stack effect can be overcome by forming the uprising current inside the stair hall properly, but there is a limit to the height in supplying into the stair hall the smoke control air volume to be supplied to a floor in case of escape from fire. The limit to the height can be extended by over-coming the stack effect by pressurizing the stair hall and the ancillary room simultaneously. It can also be anticipated that the stack effect can be overcome by connecting the air supply shaft to the stair hall at the top. As a result of computer simulations using a network type of tool, it is found that adequate performance can be achieved by pressurizing the stair hall only for a building of 190m or less, and up to 360m when pressurizing the stair hall and the ancillary room simultaneously. In all those cases, however, an overpressure venting damper is required which operates within a suitable range for venting the overpressure outside.

외부바람과 연돌효과의 상호작용에 의한 고층주거 건물의 연간 침기량 분포 (The annual infiltration distribution caused by wind and stack effects in high-rise residential buildings)

  • 박주현;윤성민;송두삼;김용식
    • 도시과학
    • /
    • 제8권1호
    • /
    • pp.25-31
    • /
    • 2019
  • Infiltration affects indoor environmental and air quality and energy consumptions in buildings. Especially, airflow and the infiltration are more remarkable in high-rise buildings due to the air-driving forces (stack and wind effects). Thus, it is important to understand infiltration distributions in high-rise residential buildings. In this study, the weather-driven infiltration is characterized from the viewpoint of interactions between external wind and stack effect in high-rise residential buildings. To calculate accurately the annual infiltration distributions, this study also suggests an airflow and thermal simulation method with a two-step calibration of air-leakage data. The simulated results show (1) how the interaction between stack and wind effects induce infiltration types (outdoor and interzone air infiltration) and (2) how much the interzone air infiltration (being ignored in previous studies) occurs due to the stack effect, as well as the outdoor air infiltration rates.

초고층 주거용 건물에서의 연돌효과 영향 분석 (Analysis of the Impacts of Stack Effect in High-rise Residential Buildings)

  • 양인호;조재훈;김광우;여명석
    • 한국주거학회논문집
    • /
    • 제13권4호
    • /
    • pp.61-66
    • /
    • 2002
  • The objectives of this study are to clarify the impacts of stack effect in high-rise residential buildings and to present technical methods to reduce stack effect. For the evaluation of stack effect, architectural design guidelines were used and computer program simulations based on network model were performed. The evaluation shows that problems due to stack effect may be reduced by appropriate architectural designs, such as increase in air-tightness of building envelop, and provision of vestibules around entrance and elevator hall doors.

건물 내 공기유동 해석에 외부 바람이 미치는 영향의 분석 (A Simulation Method for Considering the Outdoor Wind-Pressure in Calculation of Indoor Air-Flow in High-Rise Buildings)

  • 김대영;송두삼
    • 설비공학논문집
    • /
    • 제28권2호
    • /
    • pp.55-62
    • /
    • 2016
  • The air flows in building caused by thermal buoyancy, known as the stack effect, have a pronounced influence on both the indoor environment (thermal environment, noise, draught and contaminant diffusion) and energy needs in high-rise buildings. Prior studies for airflow in high-rise buildings were focused on the degree of stack effect and countermeasures. The wind pressure was neglected during the calculation of the indoor airflow in high-rise buildings to clarify the effect of thermal buoyancy in previous studies. However, wind is an important driving force of indoor airflows in buildings with the stack effect. In this study, the effect of wind pressure on indoor airflow in high-rise building when the stack effect is dominant in winter was analyzed. In this paper, methods that involved considering the wind pressure in airflow network simulation were analyzed.

고층 아파트에서 응축기 적층문제 분석 (Analysis of the Condenser Stack Effect in a High-Rise Apartment Building)

  • 최석호;이관수;김인규;이동혁
    • 설비공학논문집
    • /
    • 제16권9호
    • /
    • pp.796-803
    • /
    • 2004
  • The stack effect of a new type condenser installed in a high-rise apartment building was studied numerically A sirocco fan is introduced to the new type condenser instead of an axial flow In. The new type condenser intakes the cold air through the lower inlet and exhausts the hot air through the upper outlet. The effects of the building height and frontal wind on the performance of an air-conditioner were analyzed. The performance of an air-conditioner was evaluated by using COP (coefficient of performance) and CGPI (condenser group performance indicator). the hot air was exhausted by the new type condenser at an angle of 50$^{\circ}$ from the outer wall of the building. If there was no draft, the new type condenser installed in the high-rise apartment building had a good performance and its performance on each floor is not influenced by the stack effect. It is shown that the efficiency of the air-conditioner installed in several floors below the top floor decreased when the frontal wind velocity was greater than 8 m/s.