원형 수평앵커를 이용한 파이프 골조 온실기초의 인발저항럭 개선에 관한 연구

윤용철,이근후,유찬,Yoon Yong Cheol,Lee Keun Hoo,Yu Chan 한국관개배수위원회 2003 한국관개배수논문집 Vol.10 No.2

Bench scale experiments have been carried out to evaluate the adaptability of the anchor for improving the uplift capacity of foundation of pipe framed greenhouse which is typically adopted in conventional plastic film glazing greenhouses, such as 1-2W ty

온실 냉방을 위한 히트펌프의 성능 분석

윤용철 ( Yoon Yong Cheol ),서원명 ( Shu Won Myung ),이석건 ( Lee Suk Gun ) 한국농공학회 2001 한국농공학회지 : 전원과 자원 Vol.43 No.6

This experiment was carried out to analyze on the cooling and dehumidifying effects of greenhouse by air-to-water heat pump system errploying the air as cooling source Following results were obtained : 1. The coefficients of performance (COP) of heat pump itself and total heat pump system were approximately 2.71~2.88 and 1.99~2.22, respectively. 2. The night-time cooling load of experimental greenhouse was 64.9 MJ/h, and the heat absorbed (cooling load) from heat pump system was 816.3~1.004.6 MJ/day. 3. The dehumidified moisture amount from experimental greenhouse was 7.0~15.0 kg/h. 4. The night time temperature of experimental greenhouse cooled by heat pump system could be maintained 4~6℃ lower that of control greenhouse which was almost equal to outside air temperature

온실을 이용한 홍고추의 건조

윤용철 ( Yoon Yong Cheol ),서원명 ( Suh Won Myung ),강종국 ( Kang Jong Guk ),조화대 ( Shino Kazuo ) 한국농공학회 2001 한국농공학회 학술대회초록집 Vol.2001 No.-

This study was initially performed to investigate current red-pepper drying methods commonly being adopted on red-pepper cultivation farm area. Based on the informations obtained from the field survey, an experiment of red-pepper drying was carried out to verify the actual drying potential of plastic covered solar house similar to the conventional pipe frame greenhouses covered with one or two layer of plastic film. Some results obtained from field survey and drying experiment for red-pepper are summarized as follows; 1. Various patterns of red-pepper drying process were found; 1) complete natural drying with red-pepper exposed in outdoor air, 2) hot air drying by dry chamber only, 3) combination drying by hot air dryer together with plastic covered passive solar house, 4) drying with plastic covered solar house unit. 2. The average air temperatures of outdoor and solar house during drying experiment period were 26.9 - 30.8 and 28.6 - 33.8°C, respectively, and the maximum air temperatures of those two were 34.2 - 36.4 and 39.8 - 52.3°C, respectively. Horiiontal solar intensity during experiment period was 18.49 - 23.96 MJ/m², and relative humidity of outdoor and experimental solar house were 56 - 66% and 64 - 70%, respectively. 3. The weight of red-pepper during drying experiment period was decreased almost linearly from initial moisture content of 85% to final moisture content of 14%.

태풍에 의한 파이프 골조 온실의 변형도

윤용철 ( Yoon Yong Cheol ),서원명 ( Suh Won Myung ) 한국농공학회 2002 韓國農工學會誌 : 전원과 자원 Vol.44 No.4

This research was performed to study the actual behavior of 1-2W type pipe greenhouse under the influence of typhoon by measuring the various strains in structural materials. These results can eventually be utilized in the design criteria as well as in the modification of conventional equation for calculating more realistic wind loads. The first data under the influence of Typhoon Olga arrived in Jinju on Aug. 1999 were obtained by strain gage with 10 sensor points. According to the data obtained, the typical variation of strain depending on wind pattern could be observed. The strains in structural frame were fluctuated very sensitively depending on the direction and magnitude of wind velocity. But some of the data were lost or missed by system's failure. A kind of inherent vibration pattern of greenhouse pipe frame was observed from the plotted data, but this phenomenon is not so clear as to be separated from the overall fluctuation so far. This experimental research is expected to be continued as a long term project to measure and analyze the strain pattern of structural frame depending on the various locations and section characteristics by way of adopting more efficient instrument with sufficient number of measuring points and accuracy.

온실단지내 폐영농자재의 처리에 관한 실태조사 (Ⅱ) - 진주, 김해지역을 중심으로 -

윤용철 ( Yong-cheol Yoon ),서원명 ( Won-myung Suh ),김영주 ( Young-ju Kim ),최만권 ( Man-gwon Choi ),배용한 ( Yong-han Bae ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-

The purpose of this study was to suggest effective management plans for farming material waste that is generated inside greenhouse complexes, and to review the management status of the farming material waste for farming facilities. The research results are summarized as follows. The farming waste that is generated in Korea has been treated the same as life waste, and the data for the waste is still being managed however, there was no information about the supply amounts which lowered the reliability. It was not easy to research the management status of the farming equipment supplied to the farms because they are purchased based on need however, it was determined that the system that can manage from the supply, collection, recycling, and treatment steps by using local agriculture association and agriculture technology management centers. Moreover, it was determined that the environmental friendly materials need to be further developed to recycle the farming materials. Especially, for the public dumps, not only financial support but also the support of the local residents is required. The farmer’s groups, villages or local governments can advertise and provide education for residents so they can be the guardians of their local environment.

파이프 골조온실의 원주형 콘크리트 기초의 인발저항력에 관한 연구

윤용철 ( Yoon Yong Cheol ),윤충섭 ( Yoon Choong Sup ),서원명 ( Suh Won Myung ),강만호 ( Kang Man Ho ),篠和夫 ( Shino Kazuo ) 한국농공학회 1998 한국농공학회지 : 전원과 자원 Vol.40 No.4

Recently pipe-framed greenhouses are widely constructed on domestic farm area. These greenhouses are extremely light-weighted structures and so are easily damaged under strong wind due to the lack of uplift resistance of foundation piles. This experiment was carried out by laboratory soil tank to investigate the displacement be haviors of cylindrical pile foundations according to the uplift loads. Tested soils were sampled from two different greenhouse areas. The treatment for each soil type are consisted of 3 different soil moisture conditions, 2 different soil depths, and 3 different soil compaction ratios. Each test was designed to be repeated 2 times and additional tests were carried out when needed. The results are summarized as follows : 1. When the soil moisture content are low and/or pile foundations are buried relatively shallow, ultimate uplift capacity of foundation soil was generated just after begining of uplift displacement. But under the high moisture conditions and/or deeply buried depth, ultimate up-lift capacity of foundation soil was generated before the begining of uplift displacement. 2. For the case of soil S₁, the ultimate uplift capacity of piles depending on moisture contents was found to be highest in optimum moisture condition and in the order of air dryed and saturated moisture contents. But for the case of soil S₂, the ultimate uplift capacity was found to be highest in optimum moisture condition and in the order of saturated and air dryed moisture contents. 3. Ultimate uplift capacities are varied depending on the pile foundation soil moisture conditions. Under the conditions of optimum soil moisture contents with 60cm soil depth, the ultimate uplift capacity of pile foundation in compaction ratio of 80%, 85%, and 90% for soil 51 are 76kg, 115kg, and 155kg, respectively, and for soil S₂ are 36kg, 60kg, and 92kg, respectively. But considering that typical greenhouse uplift failure be occurred under satura-ted soil moisture content which prevails during high wind storm accompanying heavy rain, pile foundation is required to be designed under the soil condition of saturated moisture content. 4. Approximated safe wind velosities estimated for soil sample S₁ and S₂ are 32.92m/s and 26.58m/s respectively under the optimum soil condition of 90% compaction ratio and optimum moisture content. But considering the uplift failure pattern under saturated moisture contents which are typical situations of high wind accompanying heavy rain, the safe wind velosities for soil sample S₁ and S₂ are not any higher than 20.33m/s and 22.69m/s respectively.

한국인에 대한 새로운 관절주위 잠김금속판의 해부학적 적합성: 사체를 이용한 연구

윤용철 ( Yong Cheol Yoon ),오종건 ( Jong Keon Oh ),김영우 ( Young Woo Kim ),김학준 ( Hak Jun Kim ),문홍주 ( Hong Joo Moon ),김남렬 ( Nam Ryeol Kim ) 대한외상학회 2013 대한외상학회지 Vol.26 No.3

Purpose: This study was conducted to confirm the anatomic conformity of the new periarticular locking plates designed by Zimmer on Korean adult bones and to identify the structures at risk during the application of these implants. Methods: The study was performed on the humerus, radius, and tibia of 10 adult cadavers(6 males and 4 females) procured from the cadaveric lab of our hospital. Anteroposterior (AP) and lateral X-rays were taken to confirm that the cadavers were free of any unusual lesions or anatomic variations. We used the 3.5-mm proximal humerus plate, 2.7-mm distal radius plate, 3.5- and 5.0-mm proximal tibia plates, and 3.5-mm distal tibia plate developed by Zimmer, Inc. (Zimmer periarticular locking plate). The longest plate from each group was used to confirm anatomical conformity. Standard approaches were used for each area, and soft tissue was retracted in order to pass the plate beneath the muscle. The position of the plate was confirmed using standard AP and lateral view X-rays. After this procedure had been completed, the region was dissected along the length of the implant to determine the conformity of the implant to bone and the penetrations of screws into the articular surface or violations of any vital structures, such as nerves, blood vessels, or tendons. Results: Excellent anatomical conformity was observed with Zimmer periarticular locking plates for Korean adults. The tibial nerve and the posterior tibial artery were found to be structures at risk when applying a distal tibial plate. Conclusion: Additional posterolateral fixation is recommended when dealing with cases of tibial plateau fracture when the fracture line extends to the posterolateral cortex. We recommend taking proper views using 10~15 degrees of internal rotation to ensure correct screw length and, thus, avoid penetration of vital structures and tendons.

어스앵커의 인발저항력 - 온실의 내풍성에 관한 연구 -

윤용철 ( Yoon Yong-cheol ),서원명 ( Suh Won-myung ),양영호 ( Yang Young-ho ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-

The uplift capacity and displacement of an earth anchor for improving the wind resistance of the 1-2W type plastic film pipe on greenhouse was tested using the steel circular vertical earth anchor with various diameters and embedded depths (L) in dry sand. The diameter (B) of the model anchor is 90mm, 120mm, 150mm, respectively. The model tests were performed embedded depth ratios (L/B) ranging from 1~3 in loose density. In the case of diameter 90mm, as the uplift loading increased, the uplift capacity also increased until the loading was reached to ultimate uplift capacity. After that, the uplift capacity was continually increased or decreased until the experiment was finished. In general, the ultimate uplift capacity was different depending upon the anchor diameter and embedded depth ratios.

큰느타리버섯 재배사의 실태분석

윤용철(Yong Cheol Yoon),서원명(Won Myung Suh),유찬(Chan Yu) (사)한국생물환경조절학회 2004 생물환경조절학회지 Vol.13 No.4

본 조사는 최근 급격히 증가하고 있는 새송이버섯 재배농가의 안정적 영농을 위해 재배사 설계, 시공 및 환경조절과 관련한 기초 자료를 마련하기 위해 서부 경남지역을 대상으로 새송이버섯 재배사의 재배사 규모, 환경조절시스템 등의 실태조사 및 검토를 하였다. 재배사의 형태는 반영구재배사와 영구재배사로 대별 할 수 있었고, 반영구재배사는 대부분 단동이었고, 영구재배사의 경우는 단동에 비해 상대적으로 연동이 많았다. 그리고 재배사의 규모는 형태에 관계없이 다양하였지만, 길이, 폭 및 동고는 각각 20m, 6.6~7.0m 및 4.6~5.0m정도의 농가가 가장 많았으며, 동당 바닥면적은 132~140 ㎡(40~42평)정도의 범위로서 대부분 콘크리트로 처리하여 각종 균에 의한 버섯의 오염을 방지할 수 있도록 되어 있었다. 반영구 및 영구재배사의 지붕경사각은 각각 41.5° 및 18.6~28.6°로 나타나 반영구재배사의 지붕경사도가 더 큰 것으로 나타났다. 그리고 재배상의 폭 및 단수는 재배사의 형태에 관계없이 각각 1.2~1.6 m정도와 4단이 주류를 이루고 있었다. 버섯을 연중재배 하는 재배사에는 모두 냉ㆍ난방시설, 가습장치 및 환기팬이 설치되어 있었다. 난방방식의 경우, 온수보일러, 전기히터, 증기보일러 순으로 나타났다. 냉방장치의 경우는 모두 산업용 에어컨을 설치하여 운용하고 있었다. 그리고 가습은 초음파가습기와 원심분리가습기를 사용하고 있었으며, 보조 장치로 분무노즐을 사용하는 농가도 일부 있었다. 또한 온ㆍ습도조절 및 탄산가스 조절을 위한 장치의 제어는 동별 제어시스템을 많이 채택하고 있었다. 그리고 온도센서이외는 모두 타이머를 이용하고 있음을 알 수 있었다. 배지병의 크기는 850㏄ 및 1,100 ㏄를 사용하는 농가가 주류를 이루고 있었고, 이 밖에도 800 ㏄와 950 ㏄, 1,200 ㏄병을 사용하는 농가도 있었다. 출하형태는 대부분 유통회사와 공판장을 동시에 이용하고 있었다. This study was performed to provide the basic knowledge about the mushroom cultivation facilities. Classified current status of cultivation facilities in Gyeongnam province was investigated by questionnaire. The structure of Pleurotus eryngii cultivation facilities can be classified into the simple and permanent frame type. The simple frame structures were mostly single-span type, on the other hand, the permanent frame structures were more multi-span than simple structures. And the scale of cultivation facilities was very different regardless of structural type. But as a whole, the length, width and ridge height were prevailing approximately 20.0 m, 6.6~7.0 m and 4.6~5.0 m range, respectively. The floor area was about 132~160 ㎡ and floor was built with concrete to protect mushrooms from various harmful infection. The roof slope of the simple and permanent type showed about 41,5° and 18.6~28.6°, respectively. The width and layer number of growing bed for mushroom cultivation were around 1.2~1.6 m, 4 layers in common, respectively. Most of year round cultivation facilities were equipped with cooler, heater, humidifier, and ventilating fan. Hot water boiler was the most commonly used heating system, the next was electric heater and then steam boiler. The industrial air conditioner has been widely used for cooling. And humidity was controlled mostly by ultra-wave or centrifuging humidifier. But some farmers has been using nozzle system for auxiliary purpose. More then 90% of the mushroom house had the independent environment control system. The inside temperature was usually controlled by sensor, but humidity and CO₂ concentration was controlled by timer for each growing stage. The capacity of medium bottle was generally 850 ㏄ and 1100㏄, some farms used 800 ㏄, 950 ㏄ and 1,250 ㏄. Most of mushroom producted has been usually shipped to both circulating company and joint market.

영구형 큰느타리버섯 재배사의 환경요인 분석

윤용철(Yong Cheol Yoon),서원명(Won Myung Suh),이인복(In Bok Lee) (사)한국생물환경조절학회 2006 생물환경조절학회지 Vol.15 No.2

본 연구에서는 큰느타리버섯 재배사의 환경조절을 최적화하고 시스템 설계에 대한 기초자료를 얻기 위하여 진주인근에 위치한 샌드위치패널을 이용한 영구형 재배사 2동을 대상으로 2003년 11월부터 2005년 10월까지 재배사 내부에서 측정한 환경인자들을 중심으로 검토하였다. 실험지역의 외기온은 평년의 것과 대체로 비슷한 경향을 보였다. 시스템 변경전의 경우, 동절기에는 전체적으로 설정온도보다 낮게 유지되었고, 또 최상부와 최하부의 최대온도 편차도 5.l℃ 정도로 상층이 가장 높게 나타났다. 그러나 시스템의 변경 후의 경우, 난방시 대체로 설정온도 범위에서 조절되는 경향을 보였고, 공기정체나 온도층의 역전현상이 나타나지 않았다. 상대습도는 시스템 변경 후, 80~100% 정도의 범위로서 권장상대습도 범위에 있었다. 전체 재배기간 동안 탄산가스 농도는 400~3,300㎎ㆍL­¹ 정도의 범위에 있었다. 조도는 권장조도보다 전반적으로 낮게 유지되고 있음을 알 수 있었고, 산도는 대체로 일정하게 유지되었다. 수확량은 전체적으로 일정하지 않았고, 포기재배의 경우가 상대적으로 등외품이 적었으며, 증수 효과도 있었다. 전력소비량은 계절별로 일정한 경향이 있음을 알 수 있었고, 하절기보다 동절기에 전력소비량이 현저히 많은 것을 확인 할 수 있었다. Pleurotus eryngii is one of the most promising mushrooms produced on the domestic farms. The quality as well as quantity of Eryngii is sensitively affected by micro climate factors such as temperature, relahumidity, CO₂ concentration, and light intensity. To safely produce high-quality Eryngii all the year round, it is required that the environmental factors be carefully controlled by well designed structures equipped with various facilities and control systems. At the commercial mushroom cultivation houses of permanent frame type (A, B), this study was carried out to find out reasonable range of each environmental factor and yield together with economic and safe structures influencing on the optimal productivity of Eryngii. This experiment was conducted for about two-year from Nov. 2003 to Dec. 2005 in cultivation house. Ambient temperature during the experiment period was not predominantly different from that of a normal year. The capacity of the hot water boiler and the piping systems were not enough. Because the capacity of electric heater and air circulation were not enough, air temperatures in cultivation house before improvement of system were maintained somewhat lower than setting temperature, and maximum air temperature difference between the upper and lower growth stage during a heating time period was about 5.1. But the air temperatures after system improvement were maintained within the limits range of setting temperature without happening stagnant of air. Air temperature distribution was generally distributed uniform. Relative humidity in cultivation house before improvement was widely ranged about 44~100%. But as the relative humidity after improvement was ranged approximately 80~100%, it was maintained within the range of relative humidity recommended. And CO₂ concentration was maintained about 400~3,300㎎ㆍL­¹ range. The illuminance in cultivation house was widely distributed in accordance with position, and it was maintained lower than the recommended illuminance range 100~200lx. The acidity of midium was some lower range than the recommend acidity range of pH 5.5~6.5. The yield was relatively ununiform. In case of bottle capacity of 1,300cc, the mushroom of the lowest grade was less than 3%. The consumption electric energy was quite different according to the cultivation season. The electric energy consumed during heating season was much more than that of cooling season.