• 설비공학논문집
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• 제26권2호
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• pp.61-66
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• 2014

Exhaust heat recovery ventilation systems conserve energy through enthalpy recovery between air intake and exhaust, and they are being increasingly used. An exhaust heat recovery ventilation system can be installed in the ceiling of a balcony or emergency evacuation space. However, in the case of fire, the emergency evacuation space has to by law remain as empty space, and therefore, a ventilation system can't be installed in an emergency evacuation space. Therefore, the need for a proper installation space for a ventilation system is emphasized. In this study, to install a heat recovery ventilation system in a lightweight wall, a heat exchanger was assembled of thickness below 140 mm. The efficiency of heat recovery was analyzed through performance experiment, in the case of the cooling and heating mode. The heat recovery efficiency increases when the surface area is increased, by using closer channel spacing in the heat exchanger, or by increasing the size of the heat exchanger.

• 한국환경과학회지
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• 제32권8호
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• pp.573-583
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• 2023

This study was conducted to verify the effectiveness of improving indoor environmental awareness, relieving stress, and improving learning efficiency in school indoor green space, and suggest desirable ways to develop indoor green space in the future. As part of the study, a survey was conducted among 225 individuals across six schools in a metropolitan area with garden and panel-type indoor gardens inside the school building. The survey comprised the current status and use of indoor green spaces, the perception of indoor green spaces, improvement measures in indoor green spaces, and basic properties. Semantic Differential (SD) was used to investigate the impression of school indoor spaces. Resultantly, the more frequent the use of green spaces in the school, the more they feel the positive effects of indoor green spaces, such as improving the school's indoor environment, reducing stress, and improving learning efficiency. In addition, it appears that the more frequent contact with the natural environment, the more they feel the positive effects provided by indoor green space at school. Therefore, it is suggested that educational conditions must be improved by revitalizing various green welfare, including indoor green areas, at the school level.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(II)
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• pp.372-375
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• 2003

Rail station premise's unused land speaks unused space long period among that is station porter underwear space. Also, will may see that two is also unused land if is operated as inefficient occupying a lot of spaces unnecessarily. These space have used by profit making business and station development putting first past. But, necessity of more active business effort is brought ill efficiency side of land. Unused land's efficient practical use is method that can increase railroad property. Therefore, in this study, define shortly about composition of reciprocal space, and presents unused land's practical use plan in station.

• 한국산업융합학회 논문집
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• 제3권3호
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• pp.245-250
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• 2000

This study was carried out to investigate blowing performance for blowing type in space heater. This paper present that power requirement, static pressure, total pressure and static pressure efficiency were increased in proportion to air flow rate. And in the Korean space heater, side ward blowing type was effected than downward blowing type.

• 한국항공우주학회지
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• 제30권8호
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• pp.141-147
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• 2002

위성의 임무말기에 추력기 효율을 추정하는 것은 추력기를 이용한 자세제어에 매우 중요한 과정이다. 본 연구에서는 무궁화위성 1호의 APEMAC 자세제어 수행시 지상으로 전달되는 텔레메트리를 통해 하드웨어적인 감쇠 효율을 추정하는 것이 아니고 비정상적인 모멘텀 변화로부터 연료에 섞인 Bubble의 영향으로 인해 발생되는 순간적인 추력기 효율 변화를 Simulink로 구현된 로직을 통해 얻어진 결과와 비교하여 추정하였다. 실제 텔레메트리가 변동 효율을 적용한 Simulink 결과와 일치함으로써, 본 연구의 결과는 일반 정지궤도 위성의 말기 운용 효율 증대에 기여할 수 있을 것으로 기대된다.

• International Journal of Aeronautical and Space Sciences
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• 제4권1호
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• pp.26-33
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• 2003

Recess is a geometrical configuration shape that the exit surface of an inner injector is located at a certain length inward from that of an outer injector. It is known to have the characteristics that it can augment mixing efficiency and flame stabilization through internal mixing of propellant in it. So, various experiments, such as backlit stroboscopic photography, phase Doppler particle analyzer(PDPA) and mechanical patternator, were performed at several recess lengths to grasp its effect on the spray characteristics of spray angle, breakup length, atomization and' mixing. Recess length was normalized to dimensionless recess number and two principal mechanisms of impingement and swirl recovery were introduced to explain its influence on the spray characteristics. The effect of recess on SMD doesn't appear significantly near the recess number where mixing efficiency attains to the maximum, whereas mass distribution and mixing efficiency are changed considerably. Thus, it can be inferred that a certain optimum recess number exists, where mixing efficiency becomes the maximum.

• 한국실내디자인학회논문집
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• 제16호
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• pp.142-152
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• 1998

As a rapid supply of a culture facility the change of living style bring on needs about storage space in the residence space. This study choose Hong Je Dong-Byuk San 4 type apartment house which was built in 1990 as research target and we selected 4type of a total 12house and we choose LDK as a research target that is high in a requirement and utilization other space is excluded in this study. We can expect that the apartment house will be differed with area of living space of apartment house in the requirement of storage space. Small apartment house is requried various storage planning because of confined living space But big apartment houses required storage planning of simple type because it have already storage space. So we have to do efficiency storage planning because of limited space in the apartment house. Base on this results we will show storage space according to the type of pyeong. So this study show proper storage type according to the scale of apartment house,.

• 자연과학논문집
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• 제17권1호
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• pp.65-77
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• 2006

This study aims at providing suitable outdoor spaces for physical, social, and psychological condition of Korea elderly, examining design characteristics and presenting design guideline of outdoor space for elderly. To do this, this study examined previous research papers and scholastic writings, related to elderly housing, and analyzed existing outdoor space for elderly. Additionally evaluation of usage pattern and physical trace carried out four silver towns. As a result, first, the study showd that characteristics of outdoor space are related to safety, amenity, recognition and efficiency. Second, types of outdoor space in elderly related facilities are very limited in verity, just facilitating with rest space, sport space, and garden space. Third, from a standpoint of barrier-free-design, four silver town cases are not carefully concerning about outdoor space for elderly. These spaces should be designed for both neighborhood and elderly people.

• 대한가정학회지
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• 제42권5호
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• pp.93-106
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• 2004

The purpose of this study is to make clear the indoor environmental efficiency and spatial function of the front balcony in apartments using responses from residents'. An interview survey carried out during the 14/sup th/∼24/sup th/ of January 2003, and a questionnaire survey was given during the 17/sup th/∼29/sup th/of January. Interviewees consisted of 31 residents living in renovated apartments, which had the front balcony added onto the living room. The respondents of the questionnaire survey consisted of 37 residents living in ordinary apartments with an existing front balcony. The residents living in ordinary apartments show relatively positive responses on the indoor thermal environment during winter, glare by daylight, and outdoor noise. The average heating charges of the renovated apartments came out to be more expensive than the ordinary apartments. In most renovated apartments, the living area converted from front balcony was used as the same functions ('space for drying the laundry', 'storage space', or 'space for cultivating of flower pots') of ordinary front balcony. From the results of this study, it is undesirable to renovate the front balcony as an addition to the livingroom.

• 한국화재소방학회논문지
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• 제30권1호
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• pp.121-129
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• 2016

구급차는 병원 전 응급의료서비스의 중요한 요소이며, 119 구급대원의 업무능률 향상을 위한 중요한 공간이다. 구급대원들이 직무능력을 최대한 발휘할 수 있도록 구급차 내부의 환경을 최적의 공간으로 하여 구급대원들의 책임과 기능적 역할을 제공할 수 있도록 개선되어야 할 것이다. 따라서 본 연구에서는 구급차의 내부 공간에서 환자실에 탑재되어야 하는 응급의료 장비와 약제의 탑재 공간 확보 및 구급차 내에서의 응급처치에 따른 원활한 공간의 배치를 재구성하였으며, 환자의 위치와 응급처치 요원의 배치에 따른 공간 배정에 대한 분석 및 효율적 방법을 제시하고 있다. 또한 본 연구는 구급차 주행 중 처치공간에서 수행하는 119 구급대원 업무의 효율성을 향상시키기 위한 구급대원의 직무수행에 적합한 구급차 내부 수납공간의 디자인 설계 및 사용 환경에 대한 파악 및 문제점 분석을 통하여 응급의료서비스에 대한 안전성과 효율성을 제공하기 위한 새로운 환자실 공간 크기 및 디자인 안을 제시하고자 한다.