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이운용,Lee, W.Y. 국립한국농수산대학교 교육개발센터 2009 현장농업연구지 = Journal of practical agricultural resear Vol.11 No.1
시설하우스의 공기환경은 작물생육에 큰 영향을 준다. 특히 기공주변 공기의 상대습도는 증산작용에 크게 영향을 주며, 안개가 끼게 되면 기공을 통한 증산작용이 일어나지 않아 작물은 생육을 멈추게 된다. 이에 대한 이론적 고찰을 습공기선도를 중심으로 살펴보았으며, 그 기술을 권왕림(경기도 이천시 백사면 모전2리 192) 쌈채소 재배 농장과 정기설(경기도 용인시 백암면 석천리) 백암육계 농장에 적용한 결과를 요약하면 다음과 같다. 1. 여름철 온실 공기의 온도를 낮추기 위하여 널리 사용하는 Pad & Fan, Mist & Fan 등의 증발냉각 방법은 사막 기후지역(온도는 높고 습도는 낮은 지역)에 적합한 방법으로 우리나라와 같이 고온 다습한 기후에는 적합하지 않다. 2. 겨울철 저녁에 온실을 보온하기 전에 따뜻한 공기의 열이 연료비를 절감 할 수 있다는 생각으로 환기를 하지 않으면 절대습도가 높아 약간의 온도가 떨어져도 안개가 발생하게 된다. 3. 겨울철 저녁에 온실을 보온하기 전에 외부 공기로 충분히 환기하여 절대습도를 낮추면 노점온도가 낮아지고, 약간의 난방으로도 온실의 안개를 방지할 수 있다. 4. 여름철 상추재배에서 시원한 바람으로 공기환경을 개선한 결과 41.6%의 증수효과가 있었다. 5. 겨울철 육계농장의 공기환경 개선으로 47,300수 기준으로 폐사율 2%와 난방연료 40%를 절감할 수 있었으며, 육계 성장의 균일도를 53%→73%로 20%정도 높일 수 있었다. ※ 정기설 백암육계 농장(경기도 용인시 백암면 석천리) (011-719-7597)
지하수 이용을 위한 열교환기 개발. I - 냉각핀의 설계제작 -
이운용,안덕현,김상철,박우풍,강용구,김선배,Lee, W.Y.,Ahn, D.H.,Kim, S.C.,Park, W.P.,Kang, Y.G.,Kim, S.B. 국립한국농수산대학교 교육개발센터 2002 현장농업연구지 = Journal of practical agricultural resear Vol.4 No.1
This study was conducted to develop the heat exchanger by utilizing the heat energy of underground water(15℃), which might be used for cooling and heating system of the agricultural facilities. We developed the heat exchanger, parallel type plat fin tube made of Aluminum(Al 6063), which was named Aloo-Heat(No. of The registration design : 0247164, by Korean Intellectual property Office). The fin of exchanger was design of the granulated surface for minimizing fouling factor and dew forms, and also placed parallel to the tube in order to minimized the resistance of flows. 1. Aloo-heat was designed to have 0.03m for inside diameter, 0.036m for outside diameter of tube, 0.0012m for thickness of fin and 0.032m for length of plat fin. 2. t was also designed to have 1.5248m<sup>2</sup>/m for outside area of heat transfer, 0.0942m<sup>2</sup>/m for inside area contacting hot liquid, and the ratio (Ra) was 16.1869. 3. Efficiency of the fin was 93 percentage when fin length was 0.032m, and the fin thickness satisfied equation $\frac{h{\rho}}{k}$< 0.2 when it was 0.0012m. 4. According to the performance test of Aloo-heat, as the temperature and rate increased, the heating value also increased, heating value was 504kJ/h·m and 6,048kJ/h·m when it was 60℃, 10 𝑙/min and 80℃, 40 𝑙/min respectively. 5. The test of heating value was confident, because correlation value(R<sup>2</sup>) was 0.9898 for the temperature and 0.9721 for flow rate of hot liquid, respectively.
일축연신에 따른 Polyphenylene Sulfide(PPS)의 전기전도 및 광전도 특성
이운용,장동욱,신태수,임기조,류부형,Lee, Un-Yong,Jang, Dong-Uk,Shin, Tae-Su,Lim, kee-Joe,Ryu, Boo-Hyun 한국전기전자재료학회 1998 전기전자재료학회논문지 Vol.11 No.10
In this paper, it is investigated how the morphology and electrical properties in Polyphenylene Sulfide(PPS) changed by uniaxial elongation. XRD(X-ray diffraction) pattern shows that interplanar distance and crystallinities are decreased by increasing elongation ratio. electrical conduction mechanism of PPS is explained as Schottky emission mechanism. the electrical current is decreased by increasing elongation ratio. The conductivity is changed considerably above the glass transition temperature around 82(>$^{\circ}C$). The band gap of PPS is evaluated as 3.7~4(eV)
지하수 이용을 위한 열교환기 개발. II - 지하수이용 냉·난방기 설계제작 -
이운용,안덕현,김상철,박우풍,강용구,김선배,Lee, W.Y.,Ahn, D.H.,Kim, S.C.,Park, W.P.,Kang, Y.G.,Kim, S.B. 국립한국농수산대학교 교육개발센터 2002 현장농업연구지 = Journal of practical agricultural resear Vol.4 No.1
This study was conducted to develop the heat exchanger by utilizing the heat energy of underground water(15℃), which might be used for cooling and heating system of the agricultural facilities. We developed the heat exchanger by using the parallel type plat fin tube made of Aluminum(Al 6063), which was named Aloo-Heat(No. 0247164, offered by Korean Intellectual property Office). The trial manufactures were made from Aloo-heat which was 600mm, 700mm length respectively, and It were welded to the end "U" type in order to direct flow of the underground water. The performance test was carried out under the condition of open space and room temperature with the change of flow rate of the underground water and air. The results are as follows. 1. The trial manufactures had convection heat value from 33 to 156 W/m<sup>2</sup>℃, and It was coincided with design assumption. 2. The amount of energy transfer was increased with the increment of the area of heat transfer, the air flow, the gap of temperature inlet & outlet the underground water and the air. 3. The heat value was 6,825W when the air flow was 6,000m<sup>3</sup>/h and the gap of temperature between inlet and outlet of the underground water was 6℃, and It dropped from 25.8℃ to 23.2℃(-2.6℃ difference). The convection heat value was 88.5W/m<sup>2</sup>℃. 4. The heat value was 2.625W when the air flow was 4,000m<sup>3</sup>/h and the gap of temperature between inlet and outlet the underground water was 2℃, and It dropped from 27℃ to 22.5℃(-4.5℃ difference). The convection heat value was 33.6W/m<sup>2</sup>℃. 5. Correlation values(R<sup>2</sup>) of the testing heat values of the trial manufacture type I, II, and III were 0.9141, 0.8935, and 0.9323 respectively, and correlation values(R<sup>2</sup>) of the amount of the air flow 6,000m<sup>3</sup>/h, 5,000m<sup>3</sup>/h, 4,000m<sup>3</sup>/h were 0.9513, 0.9414, and 0.9003 respectively.
Plyometric Training 과 Isotonic Training 이 슬관절 및 족관절 Power 에 미치는 영향
이운용(Woon Yong Lee),배윤정(Yoon Jung Bae),이진오(Jin Oh Lee),윤찬호(Chan Ho Yoon),김남익(Nam Ik Kim),김덕중(Duck Jung Kim) 대한체육학회 2000 대한스포츠융합학회지 (jcses) Vol.4 No.2
The purpose of this study was to investigate effect of Plyometric Training and Isotonic Training on the Power of Lower Leg`s Knee and Ankle Joint. Subject were 21 K-university male students who had been trained for 8 weeks with Plyometric, Isotonic, control and divided into 3 groups randomly : Plyometric training group, Isotonic training group, control group. Plyometric Training Program was consists of 7 style method (Pike Jump, Double leg hop, Double leg bound, Single leg hop, Stride jump cross over, Alternate leg bound, Box jump). Plyometric Training Program performed the two days a week and period of 8weeks. Isotonic Training Program was consists of 5 style method(leg extension, leg flextion, leg press, heel raise, half squat). Isotonic Training Program performed the two days a week and period of 8weeks. Control was consist of daily routine, also control`s period is 8weeks. Data were obtained from pre-test(before treatment), mid-test(after 4weeks-treatment), post-test(after 8weeks-treatment). The collect data were analyzed by One Way ANOVA. A significant level was .05. Result were as follows: 1. Plyometric Training Group was not a significant effect on the Power of lower leg`s knee and ankle`s extensor and flexor. 2. Weight Training Group was not a significant effect on the Power of lower leg`s knee and ankle joint extensor and flexor. 3. Control Group was not a significant effect on the Power of lower leg`s knee and ankle joint extensor and flexor. 4. Ability of Jump was a significant effect on increasing between isotonic training group and control group at post-test. From the above results, for the purpose of investigation the effect of Plyometric Training on the Power of Lower Leg`s Knee and Ankle joint, the data of the study showed that (1) Plyometric Training group, Isotonic Training group and Control group were not a significant effects on the Power of lower leg`s Knee and Ankle joint. (2)but Ability of Jump were a significant effects on between Isotonic group and Control group at post-test.