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이상봉 ( Lee Sangbong ),전종길 ( Jeon Jonggil ),문종필 ( Moon Jongpil ),김민영 ( Kim Minyoung ),이수장 ( Lee Sujang ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
Recently paddy levee collapse has been increased due to neglectable management such as the omission of the levee coating and the occurrence of localized torrential downpours. Because of levee collapse, ponding depth can not be hold, and it needs a lot of expense to restoration and effort. In this study, levee covering sheet was developed for reinforcing the levee and field experiment was carried out at 2 districts(Sangju and Pyeongteak) to clarify its installation effects. From results, the developed the covering sheet gave good effects in preventing weed incidence and levee crash.
이상봉 ( Lee Sangbong ),전종길 ( Jeon Jonggil ),문종필 ( Moon Jongpil ),김민영 ( Kim Minyoung ),이수장 ( Lee Sujang ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
Soil deposition at the drainage canal causes weed incidence which leads to cutdown the flow. Therefore, it is necessary to develop a technique to reduce soil deposition. In this study, the path and amount of soil deposited were monitored at two drainage canals in a paddy field. Field monitoring was carried out by measuring the amount of discharged soil into a drainage canal and eroded soil from a slope adjoining to canal. As results, the amount of soil discharged from a paddy field was further influenced by factors, such as harrowing a paddy field and time of discharge, rather than field conditions, such as area and elevation variation. In addition, existing practices of slope management, such as herbicide dispersal, weed emergence and soybean cultivation, also contribute to increasing soil deposition.
이상봉 ( Lee Sangbong ),전종길 ( Jeon Jonggil ),김영화 ( Kim Younghwa ),이수장 ( Lee Sujang ),강석원 ( Kang Sukwon ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
Recently paddy levee collapse has been increased due to neglectable management such as the omission of the levee coating and the occurrence of localized torrential downpours. Because of levee collapse, ponding depth can not be hold, and it needs a lot of expense to restoration and effort. For the development of levee reinforcement technology, the reasons of levee collapses, collapse scales, damaged forms at 3 districts(Yangpyeong, Hwasung, Cheongwon), where the levee collapse often occurs, were investigated as the basic data. From results, the main factors of the levee collapse were levee gradient and the portion of clay ratio. Too low or too high clay contents in soil was one of collapse reason.
Estimation of Greenhouse Heating performance for Ground Filtration Water Source Heat Pump
문종필(Moon, Jongpil),이성현(Lee, Sunghyoun),권진경(Kwon, Jinkyung),강연구(Kang, YounKoo),이수장(Lee, Sujang) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
This study was carried out in order to estimate the greenhouse performance for Ground filtration water source heat pump which was installed for supplying the heat to the paprika greenhouse in Jinju city. Experimental area of Greenhouse was 3,300m², For keeping the heat from greenhouse, single plastic covering and double thermal screen was installed. With considering all of greenhouse insulation condition and designed heatng temperature, heating capacity for experimental greenhouse was calculated as 320,000kcal/hr. Coefficient of performance(COP) of Ground filtration water source heat pump was gauged and greenhouse heating performance was tested from Febuary 1 to Febuary 28 in 2011. The result showed that COP of heat pump was in the range of 3.7~4.7 and COP of heating system was in the range of 3.0~3.5. The vaule of COP was very high and the temperature inside greenhouse was well corresponded to the setting temperature of greenhouse environment controlling system. lots of Ground filtration water made the the number of well fewer and the expense for installing heating system cheaper than that of geothermal system used custmarily. and this system went beyond the limitation of intaking amount of groundwater in normal Groundwater source heat pump.
Effect of heat pump performance improvement by use of thermal tank with temperature seperation plate
문종필(Moon, Jongpil),이성현(Lee, Sunghyoun),권진경(Kwon, Jinkyung),강연구(Kang, YounKoo),이수장(Lee, Sujang) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
This study was carried out in order to estimate the effect of heat pump performance by use of thermal tank with 3 seperation plates which were able to divide thermal tank into 3 chambers that have different temperatures levels. For testing the effect of developed thermal tank which was installed for supplying the heat to the paprika greenhouse in Jinju city. The volume of thermal storage tank was designed for 110m³ which was able to cover 30% of heating capacity. The temperature difference was 3 degree Celcius between high temperature and low temperature when only heating circulation was made from heat pump to thermal tank. but 5.5 degree Celcius difference was made when heating circulation of heat pump to thermal thank and hot water supplying circulation of thermal tank to greenhouse was done simultaneously. As a result of this study showed that COP of heat pump was increased by 15% or more than that of using normal thermal tank because heat pump was able to take 3 ~ 5 degree Celcius lower thermal thank water constantly.
Polyacrylamide와 토양의 흡착 특성 구명 연구
김민영 ( Kim Minyoung ),전종길 ( Jeon Jonggil ),이상봉 ( Lee Sangbong ),문종필 ( Moon Jongpil ),이수장 ( Lee Sujang ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
The longstanding and wide use of anionic Polyacrylamide (PAM), a water-soluble flocculating agent, has been focused on food processing and packaging, paper production, mine and municipal waste water treatment until the late 1980's. However, its superior functions led the renewal of interest in its further implementations, which were to improve soil physical properties, to stabilize the soil surface structure, to prevent soil erosion, and to reduce turbidity in agricultural runoff. In contrast to US and other countries, the use of PAM in agriculture is new to some extent in Korea. The way in which PAM interacts with various soil and soil water properties, called adsorption-desorption process, is the key element to maximize the effectiveness of PAM and also determine the optimal dosage of PAM in the agricultural fields. Therefore, this study was aimed at derive the knowledge of the adsorptive/desorptive behavior of PAM to soil and soil-water properties, such as soil texture, organic matter, salinity and pH. The measurable effort on adsorption/desorption of PAM was achieved using HPLC (High Performance Liquid Chromatography) and lower/higher adsorptive/ desorptive affinities of PAM to soils were quantified. The findings of this study will add flexibility and reliability to use of PAM and to make one step forward in supporting sustainable agriculture in Korea.
최동수 ( Dongsoo Choi ),박석호 ( Seokho Park ),김진세 ( Jinse Kim ),김용훈 ( Yonghun Kim ),이수장 ( Sujang Lee ),박종우 ( Jongwoo Park ),박천완 ( Cheonwan Park ) 한국농업기계학회 2017 한국농업기계학회 학술발표논문집 Vol.22 No.1
2016년부터 중국에 수출한 진공포장 쌀이 진공이 풀려 중국 현지 소비자들에게 품질에 대한 신뢰저하로 외면 받아 판매에 어려움을 겪었다. 진공풀림 원인은 주로 포장재의 모양, 과열 열접착 및 운송 중 부주의 등을 들 수가 있다. 따라서 본 연구에서는 쌀 진공포장 후 진공 풀림현상이 발생되는 원인을 분석하고, 진공포장에 적절한 포장재 및 취급조건에 대해 구명하여, 중국 쌀 수출 시 품질신뢰도 및 경쟁력 제고로 쌀 수출 확대를 위해 진공 포장재, 진공포장기술 및 운송 · 취급 방법을 제시하고자 하였다. 미곡종합처리장에서 사용하고 있는 플라스틱 필름 포장재의 적합 여부를 살펴보기 위하여 산소투과도 및 투습도를 산소투과도 측정장치(OX-Tran Model 2/61, Mocon, USA), 투습도 측정장치(Permatran-W Model 3/33, Mocon, USA)를 이용하여 측정하였다. 적정 열접착 온도를 구명하기 위하여 열접착 작업시간간격 3, 5, 10초 3수준으로 하고 가열시간을 0.2초~2초까지 9수준으로 설정하여 포장필름을 열접착한 후접착상태를 조사하였다. 진공 포장된 쌀을 골판지상자에 2차 포장하여 운송할 때 진공풀림 현상이 발생여부를 조사하기 위해 가상 운송시험을 진동시험 장치를 이용하여 수직 및 수평으로 진동시험을 수행하였으며, 또한 취급조건에 따라 진공풀림을 조사하기 위하여 골판지 상자단위, 비닐포장 단위로 50, 70, 90cm 높이에서 낙하 시험을 하고 진공풀림여부를 조사하였다. 유통 중인 쌀 진공 포장재는 나이론(nylon)+선형저밀도폴리에틸렌(LLDPE) 복합필름으로 산소투과도가 30~70 cc/m<sup>2</sup> · day, 투습도가 2~4.5 g/m<sup>2</sup> · day로 산소투과도 및 투습도가 충분히 낮아 진공포장재로 적합했으며, 적정 열접착온도 조건은 130~150℃에서 1~1.5초가량 가열해야 되는 것으로 조사되었다. 진동시험 및 낙하시험결과, 골판지박스 포장 시 완충재를 사이에 넣은 경우 진골풀림이 적었고, 상자단위나 비닐포장단위 모두 가능한 50cm보다 높은 곳에서 낙하충격을 받지 않도록 취급해야 할 것으로 판단되었다.
최동수 ( Dongsoo Choi ),박석호 ( Seokho Park ),김진세 ( Jinse Kim ),김용훈 ( Yonghun Kim ),이수장 ( Sujang Lee ),박천완 ( Cheonwan Park ),최승렬 ( Seung Ryul Choi ),최인덕 ( Induck Choi ) 한국농업기계학회 2017 한국농업기계학회 학술발표논문집 Vol.22 No.2
일반현미의 낮은 식미와 소화율을 보완하고 기존의 영양성분을 유지하는 과피층 제거 현미에 대한 수요가 증가하고 있다. 현미의 과피층 1%를 벗겨내면 밥을 지었을 때 거칠지 않고 부드러운 맛이 난다. 하지만 과피층을 벗겨내면 일반현미에 비하여 미질의 변화가 빨라 유통기한이 짧아지는 문제가 있으므로 이를 방지할 수 있도록 과피층 제거된 현미의 저장 기간 중에 품질변이 평가 및 품질 저하를 방지할 수 있는 포장방법에 대한 연구가 요구되고 있는 실정이다. 본 연구에서는 가공현미의 품질변화를 억제하기 위해서는 산소와 수분 투과성이 낮은 포장재로 포장을 하여야 하기 때문에 적합한 포장재 선정을 위하여 국내에서 사용되는 쌀 포장재 물성을 조사한 결과 재질은 나이론/폴리에틸렌/선형저밀도폴리에틸렌의 복합재질로 두께가 0.124~0.149 mm로 산소투과도 33.97~66.78 cc/m<sup>2</sup> · day, 투습도 2.18~4.46 g/m<sup>2</sup> · day로 산소투과도 및 투습도 두 가지 모두 좋은 특성을 보였다. 품종이 백진주인 가공된 현미를 산소투과도가 33.97, 투습도가 2.72인 포장재를 사용하여 대기, 진공, 기체치환(N<sub>2</sub>, N<sub>2</sub>+CO<sub>2</sub>) 조건으로 포장한 후 저장온도(10, 20, 30°C)에 따른 저장기간 중 품질변화를 조사하였다. 초기 지방산가는 72.9 mg KOH/100g로 30일차 지방산가 변화는 10°C에서 146.7±12.3, 20°C에서 200.8±6.9, 30°C에서 240.4±16.5로 온도에 따라 가공현미 품질변화에 크게 영향을 주었다. 대기조건 포장의 경우 포장 내 기체변화를 살펴본 결과, O<sub>2</sub>는 온도가 높을수록 호흡속도에 의해 급격히 감소하는 경향을 보였다. 진공 및 기체치환 포장방법에 따른 지방산가 변화에 크게 영향을 미치지 않았다. 이는 포장 내 산소가 존재하여 영향을 미친 것으로 판단되었다. 포장 내 산소흡착제 및 흡습제와 같은 충진재를 넣어 잔존산소를 제거하여 지방산가 변화에 미치는 영향에 대해 조사가 추가적으로 필요할 것으로 판단되었다.