• 제목/요약/키워드: Air stack effect

검색결과 106건 처리시간 0.022초

Stack Effect in High-Rise Buildings: A Review

  • Mijorski, Sergey;Cammelli, Stefano
    • 국제초고층학회논문집
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    • 제5권4호
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    • pp.327-338
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    • 2016
  • This technical paper presents a detailed review of the stack effect phenomenon and of the associated implications pertaining to the design and construction of high-rise buildings in regions of extreme climatic conditions. The present review is focused on both the classical 'chimney' effect as well as on the reverse stack effect, which are respectively related to cold and hot climates. For the purposed of the work here presented, the ASHRAE (2013) design conditions of Astana (Kazakhstan) and Riyadh (Kingdom of Saudi Arabia) were selected. A 230 m tall residential building of rectangular floor plan was numerically modelled in the context of the climatic conditions of the two abovementioned cities and a number of sensitivity analyses were performed, covering parametric changes of: temperature, façade air tightness, site wind speeds and wind directions.

독립코어형 오피스 빌딩의 연돌효과 발생특성에 관한 연구 (A Study on the Characteristics of the Stack Effect Occurs in Independent Core Type's Office Building)

  • 송차원;정광섭;장현문;윤정은;임태섭
    • 설비공학논문집
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    • 제28권4호
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    • pp.145-152
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    • 2016
  • For a general office building having a center core, the distinction between the outer wall and the compartment should be clear, and it should be set at a stack effect pressure distribution acting on the respective compartment by a relative area ratio of the respective leak compartment. In the case of office buildings with an independent core for core there, some blocks of shares and exterior pressure distribution in buildings and office buildings typically have different characteristics. Therefore, if the stack effect reduction measures, designed on the basis of a general office building are applied to a stand-alone building, the core of the building should reflect the unique pressure distribution characteristics. This study, performed as part of the object corresponding to the flat plan of the building in the diversification trend, analyzed the stack effect that actually occurs in an office building having the properties intended for stand-core construction, and thus on the basis of and tested by the method of using a conventional stack effect reduction measures. Reviewed in the study, an independent cored office building that does not have the air flow path through the specific space with respect to the center core type office building has a feature, and the variation in characteristics of the pressure distribution inside the building according to this air flow path stack effect was reduced by a variety of measures that should be applied to determine the application.

CFD를 이용한 초고층빌딩 누드 엘리베이터의 온열 및 연돌현상에 관한 연구 (A Study on the Thermal Phenomena and Stack Effect of Nude Elevator Shaft of High Rise Building that used CFD)

  • 박정한
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 하계학술발표대회 논문집
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    • pp.1059-1064
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    • 2008
  • The present study is to reduce the thermal phenomena and stack effect of nude elevator of the high-rise building used CFD simulation. Since many High-rise buildings used the curtain-wall glass, thermal phenomena and stack effect can easily occur at hot and cold season, respectively. The simulation has been conducted and verified for the effects of the amount of suppling air to the environment of the inside nude elevator shaft. The results of simulations show that the problems due to the thermal and stack effect will be reduced by enforced ventilation or natural ventilation and those will be presented by temperature and velocity profiles and pressure differences.

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건축물 계단에서의 연돌효과 저감방안에 대한 현장실험 연구 (Study on Field Experiment of Stack Effect Reduction in Stairwell of Building)

  • 김정엽;김지석;이수각
    • 설비공학논문집
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    • 제27권9호
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    • pp.484-490
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    • 2015
  • The winter stack effect that occurs in vertical construction passages such as the stairwell or elevator shaft of a high-rise building negatively affects living environments, energy usage, and personal safety; therefore, a mitigation of the stack effect is required to improve building conditions. Recently, circulation-type facilities that comprise the usage of air blowers and vertical ducts were proposed as part of a mechanical approach to quantitatively control the stack effect. In this study, these circulation-type facilities were installed in a building stairwell and the performance of the device was evaluated during its operation. A numerical-analysis result was obtained under the test conditions using a network-model-based, numerical-analysis method, and the result was then used for a comparison with the test result.

초고층공동주택 국소배기용 입상덕트시스템의 제어성능평가에 관한 연구 (Study on the Control Performance Evaluation of the Exhaust Stack used in High Riser Public House)

  • 권용일;안정헌
    • 설비공학논문집
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    • 제21권2호
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    • pp.103-108
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    • 2009
  • Local exhaust system used in toilet and cooking place of low-rise public house installed roof ventilator at terminal of stack. There are many high riser public houses in Korea. These buildings were not viewed as being major contributors to exhaust pollutants producted in indoor. It was because many engineers thought that exhaust in high riser public house depends on stack effect. But Neutral pressure level represents in a terminal of stack with air tightness for the best exhaust efficiency. Thereby, lower floors have the worst indoor air quality. This paper focuses mainly on the exhaust efficiency improved by roof fan with motor installed in high riser public house. It is observed there is higher exhaust efficiency than the existing natural roof ventilator.

수직 공간 내에서 고도변화에 따른 기압차로 인한 기류현상 예측에 관한 연구 (Effect of Atmospheric Pressure Difference with Altitude on the Induced Airflow Velocity in a Vertical Closed Conduit)

  • 정광섭;김철호
    • 설비공학논문집
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    • 제21권7호
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    • pp.409-416
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    • 2009
  • On 21st century, global warming is the most serious environmental problem threatening the existence of lives on the earth. One of the serious reasons of this nature phenomena was due to the greenhouse effect by carbon dioxide mainly produced with the combustion process of hydro-carbon fuel. and it is mostly produced. In the high oil prices age, intensification of energy efficiency promotion in the building sector is required. Windows are dominating large percentage whole building loads, and are regarding as the primary target of energy efficiency. The purpose of this research is on the obtaining of the renewable energy source in the skyscrape buildings in the metropolitan area. The air movement is happens due to the atmospheric pressure differences in the air. Due to this simple physical theory, it is easily expected to obtain the useful renewable nature energy through the high -raised vertical air stack installed in a tall building. However, there is one problem that should be resolved which is called air-hole effect in the sky -scrape buildings.

초고층 주거건물에서 굴뚝효과와 외풍영향에 인한 실내 환기 기류해석 및 평가에 관한 연구 (A Numerical Analysis on the Indoor Air Ventilation by Stack Effect and Outdoor Wind in a High-rise Residential Building)

  • 김치완;임태건;안영철
    • 설비공학논문집
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    • 제23권12호
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    • pp.828-835
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    • 2011
  • The purpose of this study is to analyze and evaluate the 3 types of indoor ventilation methods such as natural, mechanical, and hybrid ventilation in high-rise building which is affected by stack effect and outdoor air pressure. For the evaluation of the ventilation capacity, CFD simulation was performed in a typical high-rise residential building. The results of the simulations are as follows: 1) Natural ventilation method is not enough to the regulation. 2) In case of mechanical ventilation, congested area is occurred but meets the regulation. 3) In case of hybrid ventilation with stack effect, all the areas of indoor meet the regulation and congested area is reduced. 4) In case of high-rise building, the differences of ventilation rate among houses in the building are not large because the mechanical ventilation is main factor.

초고층 복합건축물 엘리베이터에서의 연돌현상 저감방안 평가 (Evaluation of the Alternatives to Minimize Stack Effect Problems with Elevators in Tall Complex Buildings)

  • 유정연;송규동;조동우
    • 설비공학논문집
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    • 제21권2호
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    • pp.118-125
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    • 2009
  • The purpose of this study is to evaluate the stack effect reduction alternatives in tall complex buildings in cold climates. The main problems in tall buildings occur in elevators. Such problems as elevator doors that do not close and exhaust airflows result in excessive pressure differences across elevator doors due to stack effect. Under the expected conditions causing these pressure differences, Field measurements are performed in three tall buildings. Each result of the measurements is analyzed in architectural design aspects. With these analysis, building design guidelines are proposed and analyzed by field measurements and computer simulations.

고층건물에서 연돌효과를 활용한 자연환기시스템 설계를 위한 이론적 고찰 (A Theoretical Study for Stack Effect driven Natural Ventilation System in High-rise Building)

  • 윤성민;서정민;김양수;이중훈;송두삼
    • 한국태양에너지학회:학술대회논문집
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    • 한국태양에너지학회 2009년도 추계학술발표대회 논문집
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    • pp.123-129
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    • 2009
  • In these days, the green building movement caused by the energy crisis is increasing, passive design is getting mere and more attention as it provides many possibilities for energy conservation. Moreover, with the increasing social intention for healthy life, the demand for indoor air Quality is increasing in Korea. As result, the ventilation system which can provide the sound outdoor air constantly has been obliged in Korea. So, the hybrid system which using natural power and mechanical power and makes up for the shortage of mechanical and natural ventilation attracts people's attention in Korea. As a hybrid ventilation system, in this study, the stack effect driven hybrid ventilation system in high-rise residential building will be suggested. And in this paper, the theoretical review for hybrid ventilation system suggested in this study will be addressed. Especially, the characteristics of pressure distribution and airflow caused by stack effect in high-rise residential building and the possibility of natural ventilation as results of stack effect will be described.

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연돌효과 저감을 위한 E/V샤프트 냉각장치의 적용에 대한 연구 (A study on application of an E/V shaft cooling system to reduce the stack effect in high-rise building)

  • 임현우;이준호;서정민;송두삼;이중훈
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2009년도 하계학술발표대회 논문집
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    • pp.284-292
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    • 2009
  • The stack-effect in high-rise buildings in winter causes many problems such as difficulties in opening or closing doors, infiltration, energy loss, noise and fire protection. Stack effect is influenced by temperature difference between the interior and exterior of building and the height of building. As an attenuation method for stack effect, the architectural methods are generally used. However, as though architectural methods were fully adopted, the problems are reported as ever in tall building. In this study, a new method to reduce stack effect will be suggested. As an active control method against the stack effect, E/V shaft natural cooling method is suggested. In this paper, the concept of E/V shaft natural cooling system and its reduction performance of stack effect by simulation and field measurement will be reported.

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