• Title/Summary/Keyword: 일영면적

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A Study on the Calculation of Overshadowing Area by Ray-Tracing Method (Ray-Tracing Method를 이용한 일영면적 산정방식 고찰)

  • Choi, Jeong-Min;Cho, Sung-Woo
    • Journal of the Korean Solar Energy Society
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    • v.31 no.3
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    • pp.36-41
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    • 2011
  • Nowadays, the solar expose right is very important with people's life. Therefore, in calculating the sunshine hours, the point analysis and area analysis methods are used in previous studies. Previous two methods have merits and faults. Therefore, ray-tracing method is used as a alternative. Ray-tracing method is adopted by the software of Autodesk Ecotect which is a widely used program by the architectural company and academic university. In this study first, ray-tracing methodology is studied with how to calculate the overshadowing area and, secondly, the sensitivity of the two major factors, overshadowing accuracy and sky subdivision, is analyzed. With these results, appropriate application of the ray-tracing method is presented.

Performance Evaluation of 4 Cell Array Unit Cell for SOFCs (4 셀 나열형 SOFC 단위전지의 성능 평가)

  • 윤성필;남석우;홍성안;윤종민;한이섭;서일영
    • Proceedings of the Korea Society for Energy Engineering kosee Conference
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    • 1998.05a
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    • pp.259-263
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    • 1998
  • SOFC가 실제 발전 목적으로 사용되려면 SOFC의 성능 및 수명의 향상과 아울러 발전 목적에 따른 대용량화가 요구된다. 분산형 전원으로 SOFC를 사용하게 될 경우 수백 kW 이상의 발전 용량이 요구되며, 이러한 대형 SOFC 발전 시스템은 수십 ㎾급 SOFC를 기본 단위로 하여 이들을 서로 연결함으로써 구성 가능하다. 평판형 SOFC의 대형화는 기본적으로 개별 전지의 전극 면적을 확대하여 출력 전류를 증가시키고, 단위 전지를 여러 단 적층하여 출력 전압을 증가시킴으로써 가능해 진다. (중략)

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A Study on Flow Control Logic Valve - Static Characteristics of Proportional Poppet Type Logic Valve - (유량제어 로직 밸브에 관한 연구 ( 비례 파핏형 로직 밸브의 정특성 ))

  • Lee, Il-Yeong;Jeong, Yong-Gil;O, In-Ho
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.26 no.2
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    • pp.213-217
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    • 1990
  • This study suggests a new type flow control logic valve which have grooves on the main poppet valve. The grooves connect oil supply port to pilot chamber and the oil passages made by the grooves are designed to vary in proportion to the displacement of the main poppet valve. From analytical formulations on the hydraulic circuit including the flow control valve, equations on the characteristics of the valve were obtained. In the experiment, the relationships between valve displacement and flow rate to the load side, and the variations of flow rate to the load side according to the variation of load pressure were investigated. From the experimental and numerical results, it was ascertained that the flow control valve designed in this study had excellent characteristics on proportional control and remote control.

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Micropore Analysis and Adsorption Characteristics of Activated Carbon Fibers (활성탄소섬유의 미세기공 분석 및 흡착특성)

  • Moon, Dong-Cheul;Lee, Kwang-Ho;Kim, Chang-Soo;Kim, Do-Hyung;Kim, Mi-Ran;Shin, Chae-Ho;Park, II-Young;Nam, Seoung-Youl;Lee, Chang-Gi
    • Analytical Science and Technology
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    • v.13 no.1
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    • pp.89-95
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    • 2000
  • Three grades of activated carbon fibers (ACFs) were prepared from various precursors of plantic, synthetic, and mixed fabrics of viscose rayon and cotton. The ACFs an exhibited type I isotherms on the adsorption of nitrogen or argon. Micropore analysis revealed that the ACFs have uniform micropore size distribution in which their peak diameters were in the range of $5.6{\pm}0.3{\AA}$. The BET surface area of ACFs up to $1600m^2g^{-1}$ was proportional to the adsorption capacity of iodine. The BET values of the ACFs prepared were proportional to the burn-off degree of the products.

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An Analysis of Sunshine According to the Blocks Direction by Location Type in Apartment Complex (아파트단지의 입지유형별 주동향에 따른 일조분석)

  • 장승재;박민용
    • Journal of the Korean housing association
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    • v.14 no.5
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    • pp.11-17
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    • 2003
  • This study is aimed at analyzing on the sunshine according to the blocks direction by location type of apartment complex in Busan, to propose a planning on the decision of blocks direction and the improvement of architectural law in sunshine environment. The results of this study were as follows; On the basis of winter solstice in "□ block type", the average of ratio of shadow area in flat site is 51 % in apartment with a southern exposure, 39% in apartment with a south-eastern exposure. The average of ratio of shadow area in the descended site toward the north is 49% in apartment with a southern exposure, 34% in apartment with a south-eastern exposure. The average of ratio of shadow area in the descended site toward the south is 66% in apartment with a southern exposure, 53% in apartment with a south-eastern exposure.

The Leakage Crack Calculation of the Fire Door and the Stack Effect Analysis (방화문의 누설틈새 계산 및 연돌효과 분석)

  • Kim, Il-Young;Kwon, Chang-Hee
    • Fire Science and Engineering
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    • v.27 no.2
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    • pp.46-53
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    • 2013
  • The architecture environment has changed. The corresponding design criteria should be changed. From July 27th, 2005 the Korea Standard of the fire door changed concerning the smoke resistance test which made the door gap structure more elaborate. However the National Fire Safety Codes are applied by the old data's of England. Which in case differs in the actual construction to the blue print, making the safety standard too excessive. Analyze the results and the phenomenon that occurs due to the difference between design and reality. The National Fire Safety Codes should be revised to leakage crack calculation is presented. Difference of the air flow for the smoke protection due to the stack effect analyzed. Living patterns and evacuation patterns of the apartment reflect and reasonable air flow measurement method are presented.

Liquid Phase Adsorption of Activated Carbon Fibers (활성탄소섬유의 액상흡착)

  • Moon, Dong Cheul;Kim, Chang Soo;Park, Il Yeong;Kim, Mi Ran;Hong, Seung Soo;Lee, Kwang Ho;Lee, Chang Gi
    • Analytical Science and Technology
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    • v.13 no.5
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    • pp.573-583
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    • 2000
  • Activated carbon fibers (ACFs) were prepared from various precursors of plantic, synthetic, and mixed fabrics of viscous rayon and cotton. Their adsorption performances of phenol and methylene blue in aqueous phase were evaluated through their adsorption isotherms, adsorption rates and breakthrough curves. The two adsorbates showed type I adsorption isotherm on ACFs. Adsorption rates to ACFs were 100 fold faster than to GAC. The effective diffusion coefficients of the adsorbates in ACFs were twenty fold greater than in GAC. The ACFs removed completely ten organic pollutants from a prepared water specimens through the 2nd column of a natural filtration method where 50 L of the water samples were treated.

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Space Organization and Landscape Culture on Upper-class's House('Sauidang') in Late Period of the Joseon (조선 후기 상류주택 사의당(四宜堂)의 공간체계와 조경문화)

  • Shin, Sang-Sup
    • Journal of the Korean Institute of Traditional Landscape Architecture
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    • v.29 no.2
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    • pp.19-27
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    • 2011
  • By studying 'Sauidangzi' written by Honggyungmo(1774~1851), this paper shows on the location, the space organization, and the landscape culture of 'Sauidang' which was upper class's house in late period of the Joseon. Sauidang was the residence of about 530 kan(about $1,750m^2$) which was given to Jeongmyunggongju(daughter of Sunzo) by Injo when she married with Hongjuwon, located at the good place where Mt. Mokmyuk, Mt. Dobong, Mt. Inwang, and Janwon peak are harmonized all together. The residence was on the foothill of Mt. Mokmyuk, facing to the northeast. The main house was facing to the east with the inner and back yards, and the separate house(Sauidang) was facing to the west with the garden, and a vegetable field was set in the outer yard where is connected with a main road where willow trees were lined up, 'Sauidang' was called as "the garden of princess", and a stair-shaped flower garden was made to the south, and one could look down the Hanyang castle as a whole. In the garden, there were trees and house plants enriching one's mind to wish an eternal life with oddly shaped stones or flowers, and symbolizing a fairly land. There were 38 types of trees that were planted either on the ground or in pots as various bundles like 1 tree, 2 trees, 3 trees, 4 trees, 5 trees, 8 trees, and 9 trees. Taehosuk, oddly shaped stones, stone panels, stone pillars, jade panels, sundial, walls and fences, stone stairs, steppingstones, and buildings were set for the landscape. Also, the residence had rare luxuries of landscaping culture like Wangheeji's Nanjungsoogyeseo, Sosik's Cheeongjeongi, Jomangboo's Jeokbyukboo, and Anpyungdaegoon's Behaedangcheop.