• 한국태양에너지학회 논문집
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• 제27권3호
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• pp.169-174
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• 2007

Building integrated photovoltaic(BIPV) system operates as a multi-functional building construction material. They not only produce electricity, but also are building integral components such as facade, roof, window and shading device. As PV modules function like building envelope in BIPV, combined thermal and PV performance should be simultaneously evaluated. This study is to establish basic Information for designing effective BIPV by discovering relations between temperature and generation capability through experiment when the PV module is used as roof material for houses. To do so, we established 3kW full scale mock-up model with real size house and attached an PV array by cutting in half. This is to assess temperature influence depending on whether there is a ventilation on the rear side of PV module or not.

• 생물환경조절학회지
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• 제4권1호
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• pp.32-42
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• 1995

1. 시설형태별 온도분포는 Type 1의 경우 지붕의 환기구가 없기 때문에 중력환기는 거의 일어나지 않고, 풍력환기에만 의존하게 되므로 풍속이 약한 경우는 온도가 상승하였다. Type 2 및 Type 3는 지붕의 환기구를 통하여 중력환기가 일어나기 때문에 대체로 온도 분포도 균일한 편으로 나타났다. 2. 시설형태별 평면 광분포는 Type 1가 가장 높고 Type 2, Type 3순으로 나타났다. 즉 일사투과율에 의한 지면 일사 도달율과 직접적으로 관련되기 때문에 Type 1, Type 2, Type 3순으로 지면온도 상승에 영향을 주었다. 3. 환기모델과 열수지 모델을 도입하여 환기량 및 실내온도 변화를 구한 결과, 시설형태별 풍속의 변화에 따른 내외기온차 변화는 Type 1이 가장 크고 Type 2, Type 3순이었다. Type 1의 경우 다른 형태에 비하여 풍속이 1 ㎧로 증가하면 급격히 내외기온차가 감소하였다. 4. 실측치를 사용하여 모델에 의한 풍속변화에 따른 환기량의 변화를 추정한 결과, Type 3 및 Type 2가 상대적으로 Type 1보다 낮은 경향을 나타냈다. 5. 전체적으로 개량형인 Type 2 및 Type 3은 관행형인 Type 1보다 효율적이라고 판단된다. 특히, 성력화의 차원에서 보면 Type 3이 Type 2보다 월등히 우수하기 때문에 자연적인 강우차단 능력이 보장된다면 Type 3이 Type 2보다 효율적이라고 사료된다.

• 한국주거학회논문집
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• 제25권6호
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• pp.111-121
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• 2014

The purpose of the study is to understand the unique characteristics of decoration style in traditional Javanese houses. Reviewing literature and visiting site were applied as the research method. Javanese House can be divided into three parts; roof, wall and floor. First, the roof of the traditional Javanese House is the most unique and important decorative element. The roofs are covered with roof-tiles and have clay carving ornaments on top. Usually there are no ceilings, just exposed to the oblique shape roof, which are made of wood to enable air ventilation. Joglo roof is the outstanding and representative roof type of Javanese houses. There is artistic and constructive roof structure named as tumpang sari in Joglo roof. The decoration on tumpang sari is the most colorful and symbolic ornaments. Secondly, the most unique element in the wall is the gebyok. Gebyok is made of wood and full of carved ornament, which has an artistic appearance, and also important function. The top part of doors are designed as perforated woodcarving, which give both aesthetic and ventilation purposes. Last, the stratified floor is begin with ground yard, then veranda that made from hardened clay, and main room constituted with a wood scaffold to provide air circulation and remove the humidity of the ground. The decorations of the column stand (umpak) are unique, where usually lotus flower is carved into black stone or lime stone. The outside of the buildings in Java Houses is not decorated by colors or symbols, whereas colors are only used in temples, pavilion or in royal housings. Instead they have carvings and decorations on important structural elements such as columns and beams inside. The ornaments and colors of decorations symbolize their god, ancestors and piece.

• 생물환경조절학회지
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• 제11권1호
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• pp.5-11
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• 2002

본 연구는 여름 같은 고온기나 외부온도가 높지 않아도 시설내 온도가 많이 상승하는 봄 .가을 같은 시기에 온실내 고온 공기를 외부로 신속하게 유출시켜 강제환기를 사용하지 않고도 온실내부의 환경을 조절 할 수 있는 새로운 자연 환기창을 개발하는데 목적을 두고 수행하였다 패널굴절방식 측창은 지면에 가까운 쪽의 패널 하부에 절점을 두고 패널 상부가 측고 부위로부터 가이드 레일을 따라 하향하도록 구성하여 창이 개방되게 하였고, 천창은 측고 부위에 절점을 두고 용마루 쪽의 패널 상부가 가이드 레일을 따라 경사진 지붕면을 따라 하향하도록 구성하여 고온 공기층이 정체되어 있는 온실 상부인 측고 부위와 용마루 부위가 개방되도록 하였다. 굴절 패널의 상부 개방거리는 X=L(1-cos$\theta$)로 나타낼 수 있고 측면 개방 거리는 Y=L/2$\times$sin$\theta$로 나타낼 수 있다. 천창 개방시간은 4분 20초 소요되었으며 개방 시작한 2분 후부터 온도가 하강하기 시작하였고, 완전 개방 2분 후부터는 외기온과의 온도차 3~4$^{\circ}C$정도를 유지하면서 평형상태를 유지하였다. 패널굴절방식 환기창 온실의 환기성능은 체적환기량이 22.3-94.3m$^3$.m$^{-2}$ .h$^{-1}$이었으며, 환기 횟수는 15.2~39.3회.h$^{-1}$로 나타나 일반적인 연속형 천창의 10~15회.h$^{-1}$ 정도에 비해 환기효과가 높은 것으로 나타났다. 그리고 벤로형 온실과의 천창개폐시 온도하강을 비교하였을 때 환기효과가 2배 이상 높은 것으로 판단되었다.$_{r}$", $\mu$$_{r}$′) and the dielectric loss ($\varepsilon$$_{r}$"/$\varepsilon$$_{r}$′) were increased. It was caused that the absorption characteristics of the absorber were improved. The conduction loss and magnetic loss were expected to be occurred together because two matching frequencies were shown with carbon addition. It was confirmed that the matching frequency of the microwave absorber could be controlled by controlling heat-treatment temperatures and carbon additions.ons.tions.加的)으로 되거나 과가황(過加黃)이 될 우려가 있는 제조공정(製造工程)에서는 흔히들 이 방법(方法)을 무시(無視)하고 있다. 여기서 강조(强調)해 두어야 할 것은 항상 제품(製品)의 외부(外部)를 완전(完全)히 가황(加黃)시킬 필요(必要)는 없다는 것이다. 다공성(多孔性)이나 기포생성(氣泡生成)을 조장(助長)하는 불량가황상태(不良加黃狀態)와 표면(表面)에서의 과가황상태간(過加黃狀態間)의 균형(均衡)을 취(取)해 줘야 하는데 물론(勿論) 이때는 가황시간(加黃時間)을 단축(短縮)시켜야 한다는 경제적(經濟的)인 측면(側面)도 아울러 고려(考慮)해야 한다

• 한국농촌건축학회논문집
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• 제15권2호
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• pp.25-32
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• 2013

The purpose of this study is to analyze the residential space composition and extension of Jeonja-jip and Dureong-jip in Samcheok region. The results of this study are as follows. It appears three residential plan types - Jeonja-jip with Anmaru(a room made of wooden floor), Jeonja-jip without Anmaru and Dureong-jip with Anmaru- in survey region. It was needed the extension of residential space at Jeonja-jip(a house type with two-row rooms which be composed of 田type under one roof) and Dureong-jip(a house type with inner floor which be surrounded by rooms under one roof) because of shortage of sleeping space, working space and keeping space owing to growing large family. The solutions of these shortages will be the extension of space in houses. Jeonja-jip's basic type which is the Kyup-Jip(a house type with two-row rooms under one roof) of 一 type with 6 Kans(Kan, a unit to count room to divided with four posts) is transformed and extended to 田shaped house with 11 Kans toward X-axis orientation. Dureong-Jip's basic type which is ㄱ type with 7 Kans is transformed and extended to the Sekyup-Jip with 9 Kans and the Nekyup-Jip(a house type with four-row rooms under one roof) with 12 Kans toward Y-axis orientation by insertion and addition. Jeonja-jip was developed into Kyup-Jip with front 4 or 5 Kans and side 2 Kans instead of being done into Sekyup-jip or Nekyup-Jip with insufficient day lighting and ventilation problems. Jeonja-jip and Dureong-jip were stronger than any other traditional houses in tendency to reserve Magu(cowshed) and Chikkan(toilet) in a house.

• 대한기계학회논문집B
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• 제40권3호
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• pp.191-200
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• 2016

환기는 자연환기와 강제환기로 분류되며, 최근에는 하절기에 작업장의 환경개선을 위해 냉각된 공기를 공급하는 환기를 적용하는 경우가 많아지고 있다. 하지만 대규모의 작업장에 냉각된 공기를 공급하기 위해서는 많은 에너지가 필요하며, 이를 보완하기 위해 물의 증발열을 이용하여 공기를 냉각시킨 후 공급하는 환기장치의 도입사례가 증가하고 있으며, 본 실험연구는 부산의 모 신발공장에 실제 적용된 기화방열식 환기장치의 성능을 평가한 사례연구로서 하절기에 외부의 대기온도에 대해 어느 정도의 냉각능력을 구현할 수 있는지 측정하였다. 실험결과로부터 하절기에 약 $6{\sim}7^{\circ}C$ 정도의 냉각효과를 구현하지만 급기의 상대습도가 매우 높아짐을 정량적으로 측정할 수 있었다. 실험결과에 의하면 기화방열식 전체환기 설비가 타방식과 비교하여 작동방식이 단순하며, 에너지 소비가 적은 경제적인 냉각설비이며, 급기의 습도 제어기능만 부가되면 매우 효율적인 환기 - 냉각기능을 동시에 수행할 수 있는 설비임을 확인하였다.

• 한국태양에너지학회 논문집
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• 제26권1호
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• pp.81-89
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• 2006

Building integrated photovoltaic (BIPV) system operates as a multi-functional building construction material. They not only produce electricity, but also are building integral components such as facade, roof, window and shading device. On the other hands lots of architectural considerations should be reflected such as Installation position, shading, temperature effect and so on. As PV modules function like building envelope in BIPV, combined thermal and PV performance should be simultaneously evaluated This study is on the combined thermal and PV performance evaluation of BIPV modules. The purpose of this study is to investigate a temperature effect of PV module depending on the ventilation type of PV module backside. Test cell experiment was performed to identify the thermal and power effect of PV modules. Measurement results on the correlation of temperature and power generation were obtained. Those results can be utilized for the development of optimal BIPV installation details in the very early design stage.

• KIEAE Journal
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• 제7권6호
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• pp.17-22
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• 2007

The integration of PV modules into building facades or roof could raise their temperature that results in the reduction of PV system's electrical power generation. Hot air can be extracted from the space between PV modules and building envelope, and used for heating in buildings. The extraction of hot air from the space will enhance the performance of BIPV systems. The solar collector utilizing these two aspects is called PV/T(photovoltaic/thermal) solar collector. This paper compares the experimental performance of two different types of air type PV/T collector units: the base case of a collector unit with 10cm gap for forced ventilation and the other unit with copper pin attached to PV module to enhance its thermal performance. The experimental results shows that the base case unit had the overall efficiency of 41.9% and the improved unit with copper pin attached to PV module had 50.1% efficiency. For these air type PV/T units, the forced ventilation of the air space improved the electrical performance as well as the thermal performance.

• 생물환경조절학회지
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• 제23권4호
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• pp.391-400
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• 2014

The number of large scale greenhouses has recently been increasing to cope with mass consumption of agricultural product. Korean government announced a new development plan for constructing greenhouse complex in reclaimed lands for the purpose of improvement in exports and activation of domestic market of agricultural product. Wind environment in the reclaimed land is totally different from that of inland area, and it can give a strong influence on ventilation performance of naturally ventilated greenhouse facilities. In this study, internal airflow analysis of naturally ventilated greenhouse built on a reclaimed land was conducted using wind tunnel and PIV for validation research. Later, the PIV measured results will be used to improve the accuracy of 3 dimensional CFD simulation in the future. Wind profile at a reclaimed land was produced using ESDU program and it was applied to the wind tunnel. The calculated error was only 5% and 0.96 of correlation coefficient, implying that the computed profiles were designed properly. From the measured results, when external wind speed changed from $1m{\cdot}s^{-1}$ to $1.5m{\cdot}s^{-1}$, air velocities inside the greenhouse which PIV measured were also increased proportionately in case of both side vent open and side-roof vent open. Considering reduced ratio of air velocity inside the greenhouse, it was measured a minimum of 40% in case of side vent and 30% in case of side-roof vent compared with external wind speed from each vent type. From the quantitative and qualitative PIV analysis, the PIV measured results indicated that there were well ventilated and stagnant areas in the greenhouse according to external wind condition as well as ventilation design.

• 한국축산시설환경학회지
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• 제4권1호
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• pp.1-8
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• 1998

The objective of this study was conducted to develope a mobile pig nursery(MPN) for segregation of early weaned piglet. The units of MPN was consisted of 4 rectangle-type pens, 1 workroom, 2 doors, 3 windows, 1 air-inlet, 1 exhaust fan, and 1 cooling and heating system. Total of 40 piglet were weaned at 7 days of age. The period of the feeding test was 63 days. The results obtained are as follows: 1. The insulation thickness was 70, 70 and 50 mm of roof, floor and wall, respectively. R-value was 15.32 and 10.32 of roof and wall, respectively. 2. Exhaust fan( 30.48) was installed near back door 40cm from the bottom. When exhaust fan speeds were 15, 20, 30 and 35%, Air ventilation was required 9.75, 7.07, 1.72, 1.45 minutes of respectively. 3. Average temperature in the MPN was able to maintain 27∼28$^{\circ}C$ from 7∼28 days of age, 24∼25$^{\circ}C$ from 35∼56 days of age and 20∼21.5$^{\circ}C$ from 56∼70 days of age. 4. Average daily gain, feed intake and feed conversion were 420.6g, 761.5g, 1.81 respectively.