Trawl 어선의 안정성에 관한 연구

고장권 한국수산학회 1976 한국수산과학회지 Vol.9 No.4

1) A船型은 排水量이 2,400嚬인 경수 KG의 값이 3.40m, 3.70m때 安定狀熊를 나타내었으며 排水量이 1,600嚬 1,900嚬 2,200嚬일 경우는 KG의 값이 3.40m 때 어느程度 安定範圍에 있음이 判定되었다. 2) B船型은 批水量이 2,400嚬인 경우 KG의 값이 3.40m때 만이 어느 程度 安定範圍에 있으나 排水量이 1,300∼2,200嚬일 경우 KG값이 3.40∼4.60m때는 모두 危險範圍에 있음이 判定되었다. 3. A船型은 GM의 값이 2.14m이고 GZ_(max) 1.395m 때 安定範圍에 있고 B船型은 GM의 값이 2.14m이고 GZ_(max) 1.890m때 어느程度 安定範圍에 있음이 判定되었다. The author studied the stability qualities of stern trawlers in the North Pacific Ocean according to Kato's simple judging method. The author selected 1,000 gross tonnage of A and B types, and calculated each characteristics for various conditions under 5 different free-board and 5 different KG. Finally, authour obtained some data of stability factors for the two types, and pointed out the zone of safety and danger between stability factor, GM and GZ max. The results obtained here are summarized as follows: The A type of ship is judged that it has the condition of safety when displacement is 2,400 tonnage and the value of KG was 3.40m or 3.70m. The B type of ship is judged that it only has the condition of some safety when displacement was 2,400 tonnage and the value of KG is 3.40m, but ships of the both types have the condition of danger when displacement is 1,300-2,200 tonnage and the value of KG is 3.40-4.60m. Any types of ships under various condition must have appropriate dimensions among GM, freeoard and GZ max for the stability of ships.

디젤연료로서 혼합유를 사용할 경우의 소형디젤 기관 성능에 관한 연구

고장권,고태규 濟州大學校 産業技術硏究所 1997 산업기술연구소논문집 Vol.8 No.1

This Paper is concerned with the usuability of t h e blend oil(diese1 oi1:rape-seed oil=50 : 50, capacity rate) as a fuel oil to reduce the usage of petroleum. Physical and chemical properties of blend oil as fuel oil are studied and analyzed experimentally. Engine performance from 900rpm to 1.900rpm is tested by operating small diesel engine(Ricard0 E.6 engine) injected blend oil and also t h e effects on the engine performance are investigated. The experimental results are summarized a s follows : 1. The lower heating value of blend oil is 10.130kcal/kg and flash point is 92℃. The values are different from diesel oil by 4.4% and 6.6%. respectively. 2.The viscosity of blend oil is 15.73 cSt. This value is 4.5 times larger than the value of diesel oil viscosity, but is 3.2 times smaller than the value of rape-seed oil viscosity. 3 . P-θ diagram shows t h a t the maximum explosion pressure of blend is 2~4kg/㎠ higher than that of diesel oil. 4 . Brake horse power, specific fuel consumption and exhaust temperature of blend oil are 7.5%. 3.5% and 3.9% higher than those of diesel oil, respectively. The brake thermal efficiency and noise are all most the same level compare to diesel oil. 5. Torque of blend oil is about 3.4% lower than that of diesel oil.

4-Cycle Diesel 機關의 燃料 消費率이 機關性能에 미치는 影響

高長權 제주대학교 1979 논문집 Vol.11 No.-

Specific fuel consumption of diesel engine are basic particular on the descriptive performance of the engine and number of ratio on the economics of engine. I made choice of NIIGATA 6 M 31 HS, 850 PS 4 cycle diesel Engine on experimental engine for specific fuel consumption of 4-cycle diesel engine analyse affecting on the performance of engine. 1. Actual fuel consumption was increase on straight line with indicated power. 2. When the constant conditional speed of revolution, if make the excess air factor increase with the decreasing of the fuel consumption, the specific fuel consumption was decreased. 3. The speed of revolution became faster, specific fuel consumption increase, because the cooling lose and the exhaust lose etc. increase. And low speed of revolution was just opposite to before. 4. Specific consumption was the lowest value at the highest point which the product of a mass of brake lean effective pressure and excess air factor.

遠心 펌프의 特性에 關한 硏究 : CASING內의 流動에 대해서 On the Fluid of the Interior of the Casing

高長權 제주대학교 1978 논문집 Vol.10 No.-

In this paper the author examined the relation ship between the state of flcating of internal fluid and volume of flow by oilmembrane method, pitot tube and orifice. At near front of vane with decrease volume of flow, out flow area was made narrow and it came up to limit point. A half diameter ?? of representation out flow was decreased with increase volume of flow. A coefficient of sliding was increased with increase volume of flow and it was estimate nearly constant at consume area.

小形船用 디이젤機關用 代替燃料로서의 菜種油에 關한 硏究

高長權 제주대학교 1981 논문집 Vol.13 No.-

Performance tests of domestic small marine diesel engine were carried out, using the rape-seed oil as the substitute fuel and the following results were obtained. (1) The ability of engine starting was a little inferior to the rape-seed oil, especially in the winter season. (2) The indicated specific fuel oil consumption of rape-seed oil was 10∼16% more than that of diesel oil and the indicated thermal efficiency of diesel oil was 2∼6% better than that of repe-seed oil. (3) The exhaust gas temperature of rape-seed oil was 33-47℃ lower than that of diesel oil. (4) The maximum pressure of rape-seed oil was 3∼7% higher than that of diesel oil.

船用 豫燃燒室式 4 Cycle Diesel Engine의 損矢馬力에 對한 考察

高長權 제주대학교 1969 논문집 Vol.1 No.-

This paper states the variation of the pressure ratio, indicated ratio and the relation between the fuel consumption quantity and losses of horse power etc. 1. Precombustion engines lose more horse power than direct combustion engines. 2. Much consumption of fuel in the precombustion engine is caused by the torque function. 3. The amount of total losses of horse power can be estimated from fuel consumption quantity. 4. Actual loss of horse power is almost the same as the result obtained by loss-of-horsepower calculation from the amount of fuel consumption.

성층화된 밀폐용기내의 수평방향 온도구배에 의한 자연대류에 관한 실험적 연구

고장권,현명택 濟州大學校 工科大學 産業技術硏究所 1990 産業技術硏究報告 Vol.1 No.-

Experimental investigations have been conducted to study natural convection of a stably stratified salt-water solution due to lateral heating in a rectangular enclosure of aspect ratio. 3.0. Depending on the buoyancy ratio, N, which represents the relative magnitude of solutal stratification to thermal buoyancy. four distinct flow regimes are observed. Formation and growth of the four layered flow structures is visually observed and described. with the corresponding temperature and concentration distributions in each layer.

대체연료를 사용할 경우의 디젤기관의 성능향상에 관한 연구

고장권 한국마린엔지니어링학회 1992 한국마린엔지니어링학회지 Vol.16 No.5

Rape-seed oil has high viscosity and high rubber content like other vegetable oils. When crude rape-seed oil obtained by a general oil extraction process is used in a diesel engine, automization condition during injection is not good and a large amount of combustion product is doposited in a combustion chamber. The improvement of a diesel engine is required to use rape-seed oil as a diesel engine fuel. In this study, the physical and chemical properties and combustion characteristics of rape-seed oil were investigated. The auxiliary aid was developed to improve automization condition and the effect of the auxiliary injection aid on the performance of a diesel engine was determined. The results are as follows. 1) Oil content of rape-seed is 45%. The exraction rate is 33%. The resuls show higher values compared to those of other vegetable oils. 2) The viscosity of rape-seed oil is 50.8 cSt and nearly 14 times of diesel oil viscosity. 3) The heating value and flash point of rape-seed oil are 9720kcal/Kg and 318$^{\circ}C$, respectively. 4) In case rape-seed oil is used as fuel, brake horse power, specific fuel consumption and brake thermal efficiency are compared to those of diesel oil. The results of rape-seed oil show 3.6%, 12.7% and 3.1% higher values. 5) Particle size of injection fuel with the auxiliary injection aid on the performance of a diesel engine was determined. The results are as follows. 1) Oil content of rape-seed is 45%. The extraction rate is 33%. The results show higher values compared to those of other vegetable oils. 2) The viscosity of rape-seed oil is 50.8 cSt and nearly 14 times of diesel oil viscosity. 3) The heating value and flash point of rape-seed oil are 9720kcal/Kg and 318.deg.C, respectively. 4) In case rape-seed oil is used as fuel, brake horse power, specific fuel consumption and brake thermal efficiency are compared to theose of diesel oil. The results of rape-seed oil show 3.6%, 12.7% and 3.1% higher values. 5) Particle size of injection fuel with the auxiliary injection aids is 100.mu.m smaller than that od injection fuel without the aid. 6) Brake horse power and brake thermal efficiency with the auxiliary injection aid increase 5.07% and 6.07%, respectively. However, specific fuel consumption decreases 3.85% with the auxiliary injection aid.

제주도에 있어서의 풍력에너지 이용을 위한 공학적 예측에 관한 연구(III) : 대정지역에 대하여

고장권,허종철 제주대학교 1986 논문집 Vol.23 No.-

The aim of this paper is to investigate wind speed charateristics based on the wind data of Daejung site as the place of the highest potential energy of wind power in Cheju Island. and to provide optimum design for wind power conversion system being suitable to the wind speed charateristics. The results are as follows 1. Suitable Weibull coefficients, K and C. of wind speed distribution at Daejung site are evaluated. And then the wind speed charateristics are examined and determined. 2. The optimal rated wind speed of which wind power conversion system is suitable to wind speed charateristics is evaluated. 3. Monthly no-generation percentage by the results from calculating optimal starting wind speed and calm is graphed. 4. In the case of varing the system heights from 10m to 70m,optimal rated wind speeds of the system are determined by extrapolating Weibull coefficient, K and C. variations of maximum efficiency and load factor of the system are graphed, depending on the heights.

遠心送風機의 特性에 關한 硏究

高長權 釜山水産大學校 1977 釜山水産大學 硏究報告 Vol.17 No.1-2

1. 本 硏究에서는 送風機는 casing의 容積이 一定하고, 平板 羽根을 2∼6枚를 使用하여 各翼根마다 角度를 달리 하고 또한 回傳數를 變化시켜서 送風機의 特性을 검토하였다. 2. 回傳數가 1460 rpm때, 共히 가장 風量이 많았음을 나타났다. 3. 2 blade와 6 blade때는 回傳數가 1460 rpm이고 blade의 角度가 90度일 때, 가장 風量이 많았다. 4. 3 blade때는 回傳數가 1460 rpm이고 blade의 角度가 90度때 가장 風量이 많았다. 5. manometer의 壓力差는 共히 回傳數가 1,460rpm이고 blade 角度가 60度때, 가장 많음을 나타 내었다. In this report, centrifugal blower was settled in a case and experimented with 2 to 6 sheets of flat blades. The most air capecity was appeared at 1460 rpm. with 60 angle of blade, and 90 angle of blade with 3 blade. The most big difference of the pressure was appeared at 1460 rpm with 60 angle of blade in all conditions.