• KIEAE Journal
• /
• 제11권4호
• /
• pp.55-61
• /
• 2011

Due to global warming issues caused by climate changes which are internationally being highlighted, recently, there are lots of efforts under way to reduce energy consumption in various fields. Currently, 25 percent of energy consumption in Korea are being generated from buildings and especially, nearly 54 percent of them are being consumed by households. This study, therefore, aims to consider energy consumption status in the existing rural houses and analyze structure system performance, window system performance and air-permeability of domestic passive-type buildings using PHPP which is an analysis program of building energy to improve energy consumption problems in rural areas. Then, energy reduction plans in rural houses were proposed, by comparing and analyzing energy reduction of the existing rural houses, based on these data.

• 설비공학논문집
• /
• 제14권2호
• /
• pp.184-190
• /
• 2002

This study was undertaken to judge the quality of air-tightened exhibition cases. Exhibition cases for artifacts display provide a layer of protection between the interior conditions in the exhibition case and the exterior fluctuating conditions of temperature and relative humidity in the museum environment. An infiltration model of the exhibition case was developed through the experimental measurements to calculate the number of air change rate in the exhibition case undergoing in a day, which represents the airtightness of the exhibition case. The results indicate that tighter exhibition cases provide greater protection against the fluctuating conditions of temperature and humidity outside. When the temperature and humi- dity difference between the exhibition case in-and-out is larger, some absorption materials should be applied to control the environmental conditions in the exhibition case.

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

• 한국철도학회논문집
• /
• 제5권2호
• /
• pp.112-117
• /
• 2002

Reduction of noise level in the cabin of urban transit unit is an important issue to enhance the comfortability of passengers. It is made clear that a cause of increased noise level in cabin is the imperfect airtightness of entrance doors. In this study, the sliding-plug door system is developed to reduce the noise level of cabins by securing the airtightness of entrance door. The sliding-plug door system is composed of air-driven engine, swing arms, guide rails, guide rollers and locking devices. It is economical owing to using the previous door engine system. It is also adequate for the platform system of our subway station. It was tested to prove the reliability of system and was applied to standard urban transit unit. The effectiveness of noise reduction in cabin resulting form the sliding-plug door system was confirmed by test results.

• Journal of the Korean Wood Science and Technology
• /
• 제43권6호
• /
• pp.876-883
• /
• 2015

국립산림과학원에서는 한옥의 전통건축기술을 바탕으로 한국형 기둥-보 목조주택인 ?그린 프로젝트를 2006년부터 진행해오고 있다. 최근에는 에너지 절약 기술요소를 적용하여 건물의 에너지성능을 개선하고자 하였다. 본 연구에서는 강화된 단열기준에 따른 기둥-보 목조벽체의 단열상세를 제시하고 그에 따른 건물 에너지 절감 효과를 평가하고자 하였다. 건물외피의 열관류율은 현행법 수준과 저에너지주택인 패시브하우스 수준인 두 단계로 나누었으며 건물에너지 성능을 평가하기 위하여 건물의 기밀성능은 국내 신축 목조주택 수준인 $3.0h^{-1}$과 패시브하우스 수준이 $0.6h^{-1}$ 두 단계로 나누어 열관류율과 기밀성능의 조합에 따라 4가지 경우에 대한 건물에너지 성능 평가가 이루어졌다. 대상건물은 서울에 위치하였으며 에너지 성능은 상용 건물에너지성능 평가 프로그램인 CE3가 사용되었다. 강화된 열관류율에 따라 시뮬레이션을 진행한 결과 연간 난방에너지 요구량은 $14kWh/(m^2{\cdot}a)$ 절감효과를 나타냈다.

• 토지주택연구
• /
• 제5권4호
• /
• pp.325-332
• /
• 2014

본 연구에서는 창문형 자연환기장치가 설치된 7개 세대의 소형공동주택($33m^2{\sim}51m^2$)을 대상으로 Blower Door를 이용한 현장 기밀성능 및 공기유동 성능을 측정하였다. 창문형 자연환기장치는 외기에 면하는 모든 창호 및 거실분합문에 설치되어 있으며, 수동 개폐형 장치가 설치되어있다. 본 연구에서는 자연환기장치와 창호의 개폐여부에 따라서 6개의 CASE를 설정하여 실측하였다. 측정결과, 자연환기장치와 모든 개구부를 밀폐한 상태의 기밀성능 값(CASE1)은 1.77~3.12ACH로 평균 2.27ACH로 나타났으며, 문헌조사 결과 자연환기장치가 설치되지 않은 일반 공동주택(1.65~4.28ACH)과 유사하게 나타났다. 내외측의 자연환기장치를 모두 열었을 때의 공기유동성능 값(CASE6)은 평균 5.87ACH로 나타나 밀폐조건과 비교하여 평균 3.6ACH가 증가하는 것으로 나타났다. 외측 환기장치와 창호를 밀폐한 조건에서 내측 환기장치만 개방시와 내측창을 개방시의 공기유동성능값의 차이는 평균 0.29ACH로 내측창호 개방시의 기밀성능 값이 높게 나타났다. 반대로 내측 환기장치와 창호를 밀폐한 조건에서 외측 환기장치만 개방시와 외측창 개방시의 차이는 평균 0.30ACH로 외측창호 개방시가 높게 나타났다. 내측창호만의 공기유동성능과 외측창호만의 공기유동성능 측정값의 차이는 0.77ACH로 내측창호가 더 우수하게 나타났다. 향후에는 자연환기장치와 창호 및 새시의 종류에 따른 기밀성능의 추가 측정을 통해 정량적 상관관계 조사가 필요할 것으로 판단된다.

• 한국신재생에너지학회:학술대회논문집
• /
• 한국신재생에너지학회 2007년도 춘계학술대회
• /
• pp.97-100
• /
• 2007

Fuel Cell Stack performance, which is influenced by the maintenance of a constant internal environment, requires high levels of air tightness. Used for analysis, gasket for fuel cell is made of elastic rubber materials and placed over separator, and shape of deformation of a gasket affects the transformation separator and airtightness while fastening structure. Separator as made of steel sheet isn't broken under pressure but can affect gas and cool water flow by the plastic deformation process. Therefore， it is understood that assembly process is well developed in case distribution of stress and shape of deformation is shown uniformly. This study is conducted on the assumption that a fuel cell maintenance is advantageous in that conditions. In this paper, analyses of unit cell and partial model were performed and distribution of stress and shape of deformation of Gasket and separator were analyzed to evaluate the airtightness while fastening structure.

• 설비공학논문집
• /
• 제25권11호
• /
• pp.606-611
• /
• 2013

In responding to the recent framework convention on climate change, and the rise of the need for energy efficient buildings, such as Zero Energy Buildings (ZEB), domestic insulation standards and energy conservation regulations are being reinforced, to prevent heat loss. Accordingly, the Ministry of Land, Infrastructure and Transport have made amendments in Chapter 21 "Enforcement regulations for building facilities standards etc.", and Chapter 22 "Energy conservation standard", to reflect these changes. To effectively implement these regulations, it is required to propose air-tightness test methods, and establish air-tightness standards, based on the air leakage characteristics of domestic apartment housings. This research has been done primarily to collect basic technical data, to provide guidance for the establishment of domestic air-tightness standards for new apartment housing, through studying air-tightness test methods, field measurement on air-tightness of new apartment housings, and air leakage characteristics of major developed countries.

• KIEAE Journal
• /
• 제13권2호
• /
• pp.39-46
• /
• 2013

Recently, the field of construction is putting a variety of effort into reducing CO2, since global warming is being accelerated due to climate changes and the increase of greenhouse gas. For reduction of CO2 in the field of construction, it is required to make plans to cut down heating energy of buildings and especially, it is urgently needed to cut down energy of residential buildings in rural area where occupies the majority of consumption of petroleum-based energy sources. Therefore, this research compared and analyzed the actual energy consumption, by evaluating energy performance of a detached house applying passive house design components for reduction of energy. As the result, energy consumption showed remarkable differences, according to the operation of a heat recovery ventilation unit which is one of passive house design components, and building energy consumption displayed remarkable differences, too, depending on the difference of airtightness performance during building energy simulation conducted in process of design. Based on these results, the importance of airtightness performance of passive house was verified. The result of the actual measurement of energy consumption demonstrated that LNG was most economical amongst several heat resources yielded, on the basis of LPG source energy consumption measured within a certain period of time, and it was followed by kerosene. LPG was analyzed to have a low economic efficiency, when used for heating.

• 태양에너지
• /
• 제15권3호
• /
• pp.119-125
• /
• 1995

지금까지 우리는 건물분야에서의 합리적인 에너지 사용을 위하여 건물외피의 단열성능을 향상시킴으로써 열손실을 줄이려는 데에 주력하여 왔으며, 침기로 인한 열손실을 줄이려는 노력은 상대적으로 미흡하였다. 그러나, 침기로 인한 난방에너지의 소비가 상당량에 이르는 것으로 조사됨으로써 재실형태에 따라 최소환기기준을 만족시키면서 침기에 의한 불필요한 에너지의 손실을 줄이려는 노력이 매우 유효한 것으로 평가되고 있다. 실제로 침기에 의한 불필요한 에너지의 낭비가 얼마나 되는가를 평가하기 위해서는, 건물에서의 침기율을 정확하게 측정할 수 있는 방법이 전제되어야 한다. 본 연구에서는 감압/가압법의 일종인 Blower Door System을 사용하여 공동주택에서의 기밀성능을 측정, 평가함은 물론 측정결과를 토대로 합리적인 수준까지 기밀화할 경우 난방에너지의 절약가능성에 대하여 추정하였다.