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논문 : 농산물,식품가공공학 ; 흙먼지 분리기 용이한 원형베일 세절 조사료의 사이클론 이송장치 개발
하유신 ( Y. S. Ha ),권진경 ( J. K. Kwon ),박경규 ( K. K. Park ) 한국농업기계학회 2011 바이오시스템공학 Vol.36 No.3
This study developed the cyclone conveying system using roughage cutter for the round bale reported in the previous papers. Performance tests were conducted whether it can easily separate dust from roughage such as rice straws and it can transport roughages from cutter to TMR mixer. In addition, the airflow patterns in the cyclone conveying system were investigated using CFD code (FLUENT 6.2) for various velocities of dust collection fan. The cyclone conveying system was designed based on dried rice straws with a diameter of 1,340 mm, a cylinder length of 1,220 mm, a cone length of 850 mm and the current velocity of the dust collection fan was 15∼20 m/s. It was found that transporting of roughage from cutter to TMR mixer and the separation of dust were satisfactory, and the dust removal rate of rice straws was around 31.9%. CFD analysis showed that, at the blowing fan velocity of 11.6 m/s, the airflow velocity inside the dust collector increased as velocity of the dust collection fan increased, but the airflow patterns inside the dust collector were all much the same.
논문 : 생물생산시설 및 환경공학 ; 가시광 감응형 광촉매에 의한 수경재배용 배양액의 재이용 살균시스템 개발(1) -광촉매 필터 요인시험-
정성원 ( S. W. Chung ),하유신 ( Y. S. Ha ),이종원 ( J. W. Lee ),박종민 ( J. M. Park ),권순홍 ( S. H. Kwon ),이기명 ( K. M. Lee ) 한국농업기계학회 2010 바이오시스템공학 Vol.35 No.6
We produced a basic system of sterilization of nutrient solution based on the characteristics of coated filter with the visible light-reactive titanium oxide photocatalyst according to the findings of the first stage. We developed a model system with a proper number and arrangement of filter elements, the visible light-reactive titanium oxide photocatalyst according to findings from the basic performance test. Main results of this study were as followers; The ceramic filters showed the best performance of sterilization of nutrient solution. The visible light-reactive titanium oxide photocatalyst sterilized more effectively the nutrient solution under the sunlight than UV light. The sterilization performance by passing repeatedly through a few filter was more efficient than that by treating simultaneously with a large number of filters. The filter with 15ppi in pore size, 20 mm in thickness, and 3 layers in titanium oxide coating was desirable in the intensity and sterilization performance.