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하유신(Yu Shin Ha),박경규(Kyung Kyoo Park) 한국초지조사료학회 2012 한국초지조사료학회지 Vol.32 No.1
본 연구는 겨울철과 여름철에 답리작 사료작물의 랩사일리지 생산에서 연구보고된 조사료 재배품종과 재배방법을 기준으로 하였을 때, 소요 기계에 따른 기계화 생산 작업의 특성과 부담면적, 기계 이용비용을 분석하여 조사료 생산비용을 산출하였다. 생산비용은 작물종류(호밀, 청보리, IRG, 수단그라스), 파종방법 (산파, 조파)과 트랙터 마력 (50, 75, 100, 130 ps)에 따른 경작규모별 (부담면적 ha별), 부담면적대비 경작지비율별 (25, 50, 75, 100%), 작부체계별(품종 숙기별, 동·하계 작물별)로 분류하여 산출하였다. 트랙터 100 ps, 조파를 기준으로 단일 품종 재배보다 호밀, IRG와 청보리 등을 품종 숙기별로 재배할 때 파종은 20일에서 30일로, 수확은 약 30일에서 40일로 시기가 늘어나기 때문에 부담면적이 57.1 ha에서 77.5 ha로 증가하였다. 동·하계 작물 연중 재배시 생산비용은 100 ps 트랙터, 조파, kg-TDN 기준으로 호밀 + 수단은 250원, 청보리 + 수단은 215원, IRG + 수단은 234원, 호밀 + 청보리 + IRG+ 수단은 233원으로 나타났다. 이는 연중 재배하지 않는 경우에 비해 고정비가 줄어들기 때문에 생산비용은 약 30~50% 절감되었다. 따라서 답리작 사료작물의 랩사일리지 생산시 노동피크와 수확시기의 분산, 기계장비의 효율성을 제고할 수 있도록 품종 숙기별 연중 재배 작부체계의 이용이 바람직한 것으로 판단되었다. Mechanized operation model and mechanical cultivation technology for winter barley, rye, Italian ryegrass and sudan grass wrap silage production system at the paddy field for cropping system was developed. Also, a series of experiment were performed and lots of data were collected and analyzed to develope mechanical technology, coverage area, and optimum size of the farm (break-even point) for wrap silage production system. The coverage area for winter barley or rye wrap-silage production system is determined around 61.9, 73.4, 77.5, 88.2 ha in the case of drill seeding and different ripening species by tractor power 50, 75, 100, 130 ps, respectably. The break-even point of the farming size is analyzed as 20 ha and its production cost is estimated around 367, 383, 430, 443 won/TDN-㎏ in the case of winter barley wrap-silage by tractor power 50, 75, 100, 130 ps, respectably. The break-even point of the farming size is analyzed as coverage area and its production cost is estimated around 237, 215 won/TDN-㎏ in the case of winter barley wrap silage and sudan grass by the tractor power 50, 100 ps, respectably.
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.
Twist Wheel 방식 폐비닐수거기 개발에 관한 연구(Ⅱ)
하유신(Yu-Shin Ha),박규식(Kyu-Sik Park),김진현(Jin-Hyun Kim),최중섭(Jung-Seob Choe),손철민(Chul-Min Son),남상헌(Sang-Heon Nam),김태욱(Tae-Wook Kim) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.2
This study consist of two parts. One is development of a self-propelling vinyl remover which was already reported at the previous paper. This is the second part of the study. For the study, an attached vinyl remover was developed. It was consisted of connecting tractor to bucket, removing bucket from tractor, and the process was the tractor"s assistance hydraulics. In the case of an attached vinyl remover, the vinyl was twisted 0.5times per 30∼85cm length. The bobbin"s diameter was 190mm and it"s stable travelling speed was 1m/s. The revolution of the remover wheel was 90rpm to maintain the wheel"s linear velocity. As seen at performance test at the field which had 950mm ridge intervals and 10 a area, the average working speed was 1m/s and the turning time was 20seconds. Therefore, the working performance was 24.5min/10a. The efficiency of used vinyl remover was 97% and working conditions were good.
Twist Wheel 방식 폐비닐수거기 개발에 관한 연구(Ⅰ)
하유신(Yu-Shin Ha),박규식(Kyu-Sik Park),김진현(Jin-Hyun Kim),최중섭(Jung-Seob Choe),손철민(Chul-Min Son),김태욱(Tae-Wook Kim) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.1
Mulching vinyl is used on field crops to reduce herbicides and this causes multiple effects. The mulching vinyl must be collected for the next crop season, but was left alone due to a shortage of labor. The used mulching vinyl that was left alone acted as one of the main sources of environmental pollution on farms. In order to solve these problems, a self-propelling vinyl remover was developed. The self-propelling vinyl remover consists of a travelling part and rotating of remover wheel. Each output device has a 1.5ps engine and a 2.5ps engine. The vinyl was twisted 17~47㎝/times length. The bobbin’s diameter was 160㎜ and it’s stable travelling speed was 0.5㎧. The revolution of the remover wheel bobbin was 60rpm to maintain the wheel’s linear velocity. As seen at performance test at the field which had 950㎜ ridge intervals and 10a area, the average working speed was 0.56㎧ and the turning time was 15seconds. Therefore, the working performance was 40.1min/10a.