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

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.

온실난방을 위한 히트펌프의 성능에 관한 연구

윤용철 ( Yoon Yong Cheol ),서원명 ( Suh Won Myung ),이석건 ( Lee Suk Gun ) 한국농공학회 1998 한국농공학회논문집 Vol. No.

This experiment was carried out to study on the effect of greenhouse heating by water-to-water heat pump system employing heating water tank(ground water) as the heat source. Followings are the results obtained from this study ; 1. The heat amount absorbed from evaporator and the heat amount rejected from condenser were approximately 9,000~12,000kcal/h and 13,000~17,000kcal/h, respectively. 2. The heat efficiencies of evaporator and condenser used in this experiment were approximately 79% and 83%, respectively. 3. The maximum heating load estimated for the experimental greenhouse was about 18,000~25,000kcal/h, which was found to be about 28~32% higher than the heating capacity of the heat pump system adopted for this experiment. 4. The coefficients of perfomance(COP) for the heat pump and the total heat pump system were approximately 2.9~3.5 and 1.5~2.4, respectively. 5. The coefficient of perfomance(COP) calculated from the Mollier Diagram was about 3.2 ~ 3.4, which was reasonably close to the COP estimated on the basis of measured values. 6. The temperature of experimental greenhouse heated by the heat pump system could be maintained about 12~15℃ higher than that of a control greenhouse.

온수배관을 이용한 온실의 난방성능

윤용철(Yong Cheol Yoon),신익수(Yik Soo Shin),김현태(Hyeon Tae Kim),배승범(Seoung Beom Bae),최진식(Jin Sik Choi),서원명(Won Myung Suh) (사)한국생물환경조절학회 2012 생물환경조절학회지 Vol.21 No.2

본 연구는 온실의 난방 에너지 절감을 목적으로 온실 내부에 알루미늄 온수배관을 설치하여 난방효과에 대한 기초자료를 구축하고자 수행되었다. 그 연구결과를 요약하면 다음과 같다. 전체 실험을 포함하여 온실내의 높이별 온도편차는 4.0~7.0℃ 정도의 범위로서 그 차이가 크게 나타났다. 팬코일유니트(FCU)를 작동시킨 경우가 작동시키지 않은 경우에 비해 유출입수의 온도차가 3.3℃ 정도 크고, 소비전력량은 36.2~40.1% 정도 증가하였으며, 시간당 방열량은 44.6~52.0% 정도 증가하는 것으로 나타났다. 실험기간동안 순환유량은 0.48~0.49L · s<SUP>?1</SUP> 정도의 범위에 있었고, 평균유속은 1.53~1.56m · s<SUP>?1</SUP> 정도였다. 유출입수의 평균 온도차는 6.24~11.50℃이었다. 최저 외기온 ?14.0~?0.6℃ 범위에서 설정온도별 방열량은 135,930~307,150㎉ 정도의 범위로서 시간당 9,610~19,630㎉ · h<SUP>?1</SUP> 정도의 범위에 있었다. 이것은 최대난방부하의 약 23~53% 정도의 난방에너지를 공급할 수 있을 것으로 나타났다. 전체 방열량과 소비전력량은 각각 2,548,306㎉ 및 3,075.7㎾h이다. 화석연료인 경유로 난방할 경우, 소요되는 경유의 총 소비량은 281.6L 정도이고 비용은 321,000won인 것으로 나타났다. 농가용 전력요금을 적용하면 전력사용에 대한 총비용은 110,730won 정도로서 경유 소비 비용의 33.5% 정도로 나타났다. 실험구의 온도가 대조구보다 약 8.3~14.6℃ 정도 높게 나타났다. This research was conducted to obtain basic data with regard to the heating performance that would be produced by installing an aluminum hot water pipe inside the greenhouse with the goal of reducing the heating energy in greenhouse. The research results are summarized as follows. The degree of difference in relation to the temperature by height within the greenhouse during the entire experiment was significant - within the range of 4.0~7.0℃. The temperature difference between incoming and outgoing water was about 3.3℃ greater when FCU was activated compared to when it was not activated. Meanwhile, the amount of energy consumed increased about 36.2~40.1%. The amount of pyrexia per hour also increased by 44.6~52.0%. During the experiment period, circulated flux was within the range of 0.48~0.49 L · s<SUP>?1</SUP> while average fluid speed was 1.53~1.56 m · s<SUP>?1</SUP>. The average temperature difference between incoming and outgoing water was 6.24~11.50℃. The amount of heating value by each set temperature within the minimum outdoor temperature range of ?14.0~?0.6℃ was 135,930~307,150 ㎉, and the range was within the 9,610~19,630 ㎉ · h<SUP>?1</SUP> per hour. This demonstrated that about 23~53% heating energy of the maximum heating load could be supplied. Total radiating value and amount of energy consumed were 2,548,306 ㎉ and 3,075.7 ㎾h, respectively. When heating takes place using oil, which is a fossil fuel, the total amount of light oil consumed was 281.6 L while the cost was 321,000 won. When the electricity cost for farms is applied, the total cost was about 110,730 won, which is about 33.5% of the cost required compared to oil consumption. The temperature at in the experiment area was about 8.3~14.6℃ higher compared to that of the control area.

가천대학교 길병원 권역외상센터 3개년 내원 환자 및 치료 경험 분석(2011~2013)

윤용철 ( Yong Cheol Yoon ),이정남 ( Jung Nam Lee ),정민 ( Min Chung ),전양빈 ( Yang Bin Jeon ),박재정 ( Jae Jeong Park ),유병철 ( Byung Chul Yu ),이길재 ( Gil Jae Lee ),조현진 ( Hyun Jin Cho ),마대성 ( Dae Sung Ma ),이민아 ( Min 대한외상학회 2014 대한외상학회지 Vol.27 No.4

Purpose: The first regional trauma center selected in Korea was the Gachon University Gil hospital regional trauma center; expectation on its role has been high because of its location in the Seoul metropolitan region. To determine if those expectations are being met, we analyzed the patients visiting the center and their treatment experiences for the past 3 years in order to propose a standard for the operation of a trauma center. Methods: The visiting route, visiting methods, performance of emergency surgery, the ward and the length of stay, the injury mechanism, the injury severity score (ISS), the department that managed the surgery, and the cause of death were analyzed for 367 patients visiting the center from its establishment in June 2011 through December 2013. Results: The mean age of the patients was 47 years (285 male and 82 female patients). A total of 187 patients directly visited the center whereas 180 were transferred to the center. Traffic accidents comprised the majority of injury mechanisms, and 178 patients underwent emergency surgery. The mean length of stay per patient was 11 days for those in the ICU and 27 days for those in a general ward. These patients occupied 4 beds in the ICU and 10 beds in the general ward per day. A total of 1.21 surgeries were performed per patient, and the mean number of surgeries performed per day was 0.49. The mean ISS was 15.91, and 183 patients (50%) had an ISS of ≥16. Thirty-one patients died; they had a mean ISS of 28.42. The most frequent cause of death was multi-organ failure. The mean number of treatment consultations during a patient’s stay was 6.32. Forty-five patients (13%) were discharged from the center, and 291 (79%) were transferred to another hospital. Conclusion: A systematic approach to establishing a treatment model for trauma patients, including injury mechanism, multidisciplinary treatment, and trauma surgeon intervention, is required for treating trauma patients. [ J Trauma Inj 2014; 27: 170-7 ]

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 한국농공학회논문집 Vol. No.

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.

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.

온실재배 봄배추의 소비수량에 대한 고찰

윤용철 ( Yoon Yong Cheol ),이종창 ( Lee Jong Chang ),서원명 ( Suh Won Myung ),이근후 ( Lee Keun Hoo ) 한국농공학회 1999 한국농공학회 학술대회초록집 Vol.1999 No.-

This study was performed to figure out an optimum water environment and to obtain the fundamenLal data related with saving labor and water consumption for the chinese cabbages being grown in greenhouse. The productivity of cabbages cultivated in both pots and floor were compared to each other in the aspects of height and weight depending on the soil saturation levels. Obtained results are as follows; In case of pot cultivation, the height as well as weight of cabbage in 80% soil saturation level(P80) were measured to be larger than those in the other 2 soil saturation levels(P100 and P60). The weight of floor cultivated cabbages were relatively larger than that of pot cultivated ones. In accordance with saturation ratio, the general trend of water consumption rate was maximum in P80 and was decreased in the order of P80. PIOG and P60. And the average indoor temperature as well as the plant growth rate were found to be closely related with water consumption rate.

施設園藝용 플라스틱 하우스의 태풍피해에 關한 연구

尹龍喆(Yoon Yong-Cheol),徐元明(Suh Won-Myung),尹忠燮(Yoon Choong-Sup) (사)한국생물환경조절학회 1995 생물환경조절학회지 Vol.4 No.2

온실 냉방을 위한 히트펌프의 성능 분석

윤용철 ( Yoon Yong Cheol ),서원명 ( Shu Won Myung ),이석건 ( Lee Suk Gun ) 한국농공학회 2001 한국농공학회논문집 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