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고학균 서울대학교 농업개발연구소 2001 농업생명과학연구 Vol.5 No.-
A web based program was developed to design a process and system for a continuous flow sterilization. A continuous flow sterilization method has some advantages over the batch method such as higher efficiency and productivity and lower thermal damage on food product and packaging cost than those of the batch method. This program can be used over the internet without purchasing or installing the design program. It consisted of two modules for design of process and system and data base for micro-organisms that might be involved in various kinds of foods and system components for sterilization such as heat exchangers, pumps, holding tubes, and sensors for the system operation.
고학균 서울대학교 농업개발연구소 2000 농업생명과학연구 Vol.4 No.-
To improve the milling condition of brown rice, a continuous type conditioning equipment was developed. To validate the performance of this machine, the experimental operation was done at Sa-Cheon RPC(Rice Processing Complex) using short grain rough rice. The initial moisture contents of brown rice were 15.0~16.5%(w.b.) and the flow rate of brown rice passing through the conditioner were 4,370kg per hour. The moisture content difference of brown rice between conditioned and non-conditioned were showed within 0.5%(w.b.). This result means that the water in jected to brown rice were ab sorbed to the surface of brown rice evenly. The moisture contents of conditioned milled rice were showed slightly higher than that of non-conditioned ones but it was considered that the conditioning process did not affected the weight increasing of milled rice by water supply. It was considered that the conditioning process did not influenced the whiteness of milled rice because the whiteness difference between conditioned and non-conditioned milled rice were negligible. About 18% of electric power, which drives the abrasive type rice milling machine, was saved at 0.115(cc=water)/(kg. %-brown rice) of water supply rate.
태양열 건조 시스템에 관한 실험적 연구(Ⅱ) - 벼의 태양열 건조 특성 -
고학균(Koh Hak-Kyun),김용현(Kim Yong-Hyeon),송대빈(Song Dae-Bin),박재복(Park Jae-Bok) 한국태양에너지학회 1991 한국태양에너지학회 논문집 Vol.11 No.3
곡물 bin을 이용한 벼의 건조실험을 수행하여 상온통풍건조 시스템과 태양열 건조 시스템의 건조 특성을 비교하여 분석하였다. 태양열 건조의 시뮬레이션 모형에 대한 컴퓨터 프로그램을 개발하였으며 시뮬레이션 모형에 의한 함수율의 예측치는 실측치와 전체적으로 일치하였다.<br/> 또한, inverter를 사용하여 벼의 건조 상태에 따라 송풍량을 적절하게 제어하는 송풍량 제어 시스템을 개발하였으며, 개발된 송풍량 제어 시스템을 통하여 에너지 절약 효과를 얻을 수 있었다. In-bin grain drying experiments were performed to investigate the drying characteristics between natural air and solar heated-air drying system of rough rice. A computer simulation model for solar drying system of rough rice resulted in a good agreement between the experimental and predicted moisture content.<br/> In order to save the electric energy consumption of fan, airflow rates control system using inverter was developed and resulted in the effect of energy saving.
고학균 ( Hak Kyun Koh ) 한국농공학회 1972 韓國農工學會誌 : 전원과 자원 Vol.14 No.3
Controlling insects and diseases is an important factor for increasing yields of agricultural products. Power sprayer is widely used in cooperative controlling of insects and diseases for the production of rice and fruits. However, farmers need a long hose to use the power sprayer and that presently most of the farmers have hose made abroad. This study was designed to test the change of outside diameter and unit Iength, and to measure the pressure Ioss for three different kinds of hoses made domestically and one made in Japan. The resulte are as follows; 1. The three kinds of Korean-made hoses showed an increase in the length and a decrease in the outside diameter as the spraying pressure increase. The rate of change of the length ranged from 3.5% to 1.6% and the rate of change of the outside diameter from 3.5% to 1.4% respectively. 2. As the length of hose increases, the pressure loss was 3kg/㎠ at the end of a 100m of the hose made in Japan, while it was 7-10 kg/㎠ for Korean-made hoses. 3. The Korean-made hoses were not broken under 27-28kg/㎠ of spraying pressure. 4. As a conclusion, the Korean-made hoses can safely be used under continuous rated pressure of the power sprayer, but they can not properly be used for the case of cooperative controlling system where a long hose is reguired because of the heaviness of the hoses and the narrowness of the inside diametar. Hence, it is highly recommended to improve the Korean-made hoses to be used for such a situation.