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燃料節減을 위한 Propeller 回轉數와 Propeller pitch角의 組合에 관한 小考 : 全北 402號를 中心으로
崔順烈 군산대학교 1988 群山水産專門大學 硏究報告 Vol.22 No.1
For minimizing the fuel oil consumption at sea, I have investigated the various datum between the propeller RPM and the pitch angle of propeller for the training ship of M. S Jeon Buk 402. To examine the problem, the pitch angle of propeller was changed from 9。 to 12。and The propeller RPM was changed in 480, 505, 530, 555 and 580 RPM. Th results are as follows. 1.The specific fuel oil consumption(kg/h.m) is the smallest on occasion of propeller RPM 480 and the pitch angle of propeller 9。. 2.The specific fuel oil consumption was shown the smallest increasing rate on the case of the propeller RPM 530∼555 and the pitch angle of propeller 12。. 3.To increase the constant ship speed, the fuel oil consumption is always smaller on the occasion of increasing of propeller pitch angle than increasing of propeller RPM.
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崔順烈 군산대학교 1984 群山水産專門大學 硏究報告 Vol.18 No.3
This study is invested how the air flow of the blower system is effected on the cooling equipment and the cooling area. The following conclusions were obtained experimently. 1.The cooling load of air conditioner is increased nearly in proportion to the suppling air volume through a blower. 2.By increasing of the blower intake grille surface area, the air flow of the aircondition area is increased from 12.22㎥/min. to 46.48㎥'/min. And also the cooling capacity is increased from 6880.1 Kcal/hr. to 21,171.9 Kcal/hr. Therefore, the air volume to supply the air condition area is increased from 11.93㎥/min. to 43.83㎥/min. According to the above results, the number of air circulation is increased from 2.2 times to 8.2 times per hour. Also the average room temperature is controlled from 25.23℃ to 21.68℃. It is improved to the living condition and cooling capacity.
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대형 저온진공건조기의 건조 특성에 관한 연구 : 버섯을 중심으로 With Mushroom as the Object Product for Drying
최순열 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-
In tradition, there have been two kinds of drying methods, which are sun drying and artificial drying. The sun drying method which has been adopted traditionally has been replaced by the hot-air drying method which is one of the most general methods of artificial drying, with its simple drying system, low initial cost of drying plant, and easy operating method. But the hot-air drying method has some defects ; (l)much energy loss happens due to the discharge of hot air during the drying process, (2)control of drying rate is not easy on account of changing relative humidity of inlet air for uniform hot air temperature, (3)high temperature of foods in drying process brings about the production of low-grade drying products. Vacuum drying takes advantage of energy saving and mass production because it reduces the drying time by increasing the drying rate under low temperature condition. The aim of this paper is to develop the low temperature Vacuum dryer, with low initial investments and operating costs, easy operating method and trouble-free operation.
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