• 한국화재소방학회논문지
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• 제22권4호
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• pp.20-26
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• 2008

최근 급증하고 있는 초고층건축물의 건립에 있어 건축법에서 규정하는 자연제연방식인 배연창이 바람의 영향과 함께 연돌효과에 미치는 영향을 네트워크 모델인 CONTAMW을 통해 분석하였다. 초고층건축물에서 연돌효과는 배연창 개방 및 외기풍속에 따라 중성대의 위치형성에 중요한 영향을 주는 것으로 나타났다. 배연창 개방은 중성대를 개방층 쪽으로 이동시켰으며, 외기풍속의 영향은 중성대를 고층부로 상향이동시키는 것으로 분석되었다. 또한, 화재조건에서 바람의 영향을 고려하지 않을 경우 화재실의 부력 및 팽창으로 실내공기가 배출되는 정상적으로 배연성능을 보였으나, 바람의 영향을 고려할 경우 외기풍속이 빠를수록 화재실의 부력 및 팽창보다 바람의 영향이 크게 작용하여 오히려 외기가 유입되는 비정상적인 배연성능을 나타낼 수 있음을 확인하였다.

• 유기물자원화
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• 제22권3호
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• pp.60-67
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• 2014

고층 공공주택의 화장실과 주방에 적용되는 배기 시스템은 기본적으로 두 종류의 환기팬이 적용된다. 가지 기본 유형의 지붕 팬이다. 그 하나가 자연 통풍력을 활용하는 무동력 팬이고 다른 하나는 자연 통풍력이 없을 때, 모터를 활용하여 강제로 구동하는 팬을 적용하는 방식이다. 자연/강제 겸용으로 지붕에 적용되는 환기팬은 회전축에 모터가 있습니다. 대한민국에는 많은 고층건물이 있다. 그러나 고층건물의 환기가 굴뚝효과에 의존된다고 판단하였기 때문에 이러한 건물의 실내에서 발생하는 오염물질의 제거에 대한 관심을 크게 갖지 않고 있다. 본 연구는 외기압력과 초고층아파트에 사용되는 배기연돌에 적용되는 차압에 의해 결정되는 연돌압력을 조사하기 위함이다. 본 논문은 화장실 배기풍량과 대기의 자연풍속을 변수로 하여 루프팬에 설치된 모타의 전력공급시간을 판단함으로써 기존 배기팬보다 향상된 배기효율을 예측하기 위해, 수행되었다.

• 설비공학논문집
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• 제26권7호
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• pp.343-350
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• 2014

Regardless of the building design scenarios, evaluation of high-rise buildings required to have smoke-proof enclosures that are provided with a smoke management system. The goal of the smoke management system design is to make sure the pressure differentials at every story within the building fall within the allowable pressure range. If the minimum design pressure is not met, smoke may enter the stair. If the provided pressure is too great, it becomes difficult for occupants to open the doors, while attempting to egress. Ensuring that the pressure differential between the vestibule and the floor is within the prescribed range becomes challenging, due to natural effects on the building, such as the stack effect. In this research, smokeproof enclosure design scenarios were evaluated; and as a result, separation levels for compartmentation were deduced, in the balancing of pressurized-vestibule smoke control systems.

• 설비공학논문집
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• 제23권2호
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• pp.139-146
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• 2011

The ventilation performance of a vertical exhaust duct system in the high riser public house has been evaluated by a commercial software, Fluid Flow, which solves pressure losses through the duct system including bathroom fans and a hybrid roof fan. During the numerical simulations, outdoor wind condition and stack effects in summer and winter were considered as well as the operating conditions of a basement damper and the roof fan. The results show that the bathroom ventilation in summer is the most unsatisfactory. The opening of the basement damper has a problem that the polluted air in the lower floors is exhausted to the underground parking lot, not to the rooftop. If the basement damper is closed, the exhaust flow rate in the lower floors is not sufficient due to the strong flow resistance in the long vertical duct even though the roof fan is under operating.

• KIEAE Journal
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• 제13권4호
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• pp.27-32
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• 2013

This study focus on shaft box facade, special form of box window construction. It consists of a system of box window with continuous vertical shafts that extend over a number of stories to create a stack effect. The subject building was decided by analyzing various types of exiting apartments. Shaft box type balcony was devised by setting up shaft space at a part of balcony. Air flow and indoor air temperature were simulated, performance of shaft box type balcony was compared with existing types using VE computer simulation program. Research consequence can be summarized as follow: 1) In the case of existing types, the change of window opening rate has only a little effect on the improvement of indoor temperature. But, air flow rate increased two times in the case that changed opening rate 20% to 40% 2) In the case of existing types, the growth of air flow rate has little effect on the improvement of indoor temperature. But, shaft box type represented the remarkable effect on the improvement of indoor temperature as well as the growth of air flow rate.

• Journal of Advanced Marine Engineering and Technology
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• 제39권7호
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• pp.765-772
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• 2015

본 연구는 SOFC/GT(Solid Oxide Fuel Cell/Gas Turbine)시스템의 SOFC 스택으로 공급되는 공기, 메탄 및 물의 유량변화에 따른 SOFC/GT시스템의 온도, 스택 출력 및 시스템 효율의 특성에 관하여 조사하였다. 이 때 SOFC 스택의 애노드 및 캐소드로 공급되는 가스 온도는 외부 열원의 추가 없이 시스템에서 배출되는 배기가스를 활용하여 일정하게 유지하였다. 그 결과 본 연구의 범위 내에서 외부 열원의 추가 없이 SOFC/GT시스템의 배기가스를 활용하여 SOFC 스택으로 공급되는 애노드 및 캐소드 가스 공급온도를 1000(K)로 일정하게 유지하는 것이 가능하였다. 시스템 효율은 공급 공기 유량은 많을수록, 공급 메탄 유량은 적을수록 높아짐을 알 수 있었고, 터빈으로 공급되는 배기 가스의 유량이 시스템 효율에 큰 영향을 미침을 알 수 있었다. 또한, SOFC/GT시스템의 운전 조건에 따라서 SOFC 스택 효율은 51~57%, 시스템 효율은 57~73%의 값을 얻을 수 있었다.

• 한국수소및신에너지학회논문집
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• 제29권2호
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• pp.181-189
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• 2018

Polymer electrolyte membrane fuel cell (PEMFC) system receives great attention as a promising power device for automotive applications. For the wide commercialization, the efficiency and performance of automotive PEMFC system should be further improved in terms of total system (stack and balance of plant [BOP]). Air supply module, which is a major part of the BOP, greatly affects the efficiency of automotive PEMFC system. In this paper, a systematic study on the low-pressure automotive PEMFC system was made in an attempt to enhance the net system efficiency. This study mainly presents an investigation of the effect of blower configuration (1-blower and 2-blower) on the net system efficiency of automotive PEMFC system. For this purpose, the effect of operating pressure and cathode stoichiometry on the system efficiency was investigated with stack temperature under the fixed net system power condition. Results indicate that 1-blower system is better in system efficiency over 2-blower system under an air stoichiometry of 2. However, 2-blower system is better in system efficiency under an air stoichiometry of 3. The simulation results show that the optimum operating strategy needs to be established for various blower system configurations considering blower performance maps.

• 한국화재소방학회논문지
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• 제4권1호
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• pp.3-12
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• 1990

This study is to Present the air Pressurization system of staircase as a way to decrease the injury of human life which is suffocated by smoke when the fire break out in building. 1) The best among an air pressurization system of stairshaft Is multiple air Injection system established to be situated an air injection point in each layer. 2) If the air pressurization system is also applied to the elevator accessory room to use commonly, it can prevent from the smoke spreading and pollution inside building caused by stack effect of elevator shaft. 3) For the reasonable and safe escape and air pressurization system must be carried out from the project of basic shape of building under the close cooperation with architect and fire protection expert.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 추계 학술논문 발표대회
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• pp.61-62
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• 2018

On this Study, it conducts the Standards investigation about air leakage of Buildings for performance improvement of Smoke control in Fire. In domestic standards, it is incomplete the Criteria standards of air leakage. Therefore it is considered that won't limit the smoke spread due to stack effect. But in the case of the United States, it conducts the Hot smoke air-Leakage test and it consider that can prevent the Smoke Spread in Compartment.

• 한국태양에너지학회 논문집
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• 제25권4호
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• pp.61-67
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• 2005

The purpose of this study is to evaluate the air tightness of Zero Energy Solar House(ZeSH) and to propose the construction improvement of junctions and penetrations where air infiltration was identified. Air leakage rate were measured by means of blower door test in accordance with ASTM E779-87. The results showed that ZeSH has an excellent airtightness with ACH50/20 (air change per hour at a pressure difference of 50 Pa between inside outside) of 0.34hr-1 and leakage class E by normalized leakage area of ASHRAE.