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조행묵,이창식,Jo, Haeng-Muk,Lee, Chang-Sik 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.10
The engine performance and combustion characteristics of methanol blended fuel in spark ignition engine were discussed on the basis of experimental investigation. The effects of methanol blending fuel on combustion in cylinder were investigated under various conditions of engine cycle and blending ratio. The results showed that the engine performance was influenced by the methanol blending ratio and the variations of operating conditions of test engine. The increase of fuel temperature brought on the improvement of combustion characteristics such as cylinder pressure, the rate of pressure rise and heat release in an engine. The burning rate of fuel-air mixture, the exhaust emissions and the other characteristics of performance were discussed also.
가솔린 기관의 에탄올혼합연료의 배출가스 특성에 관한 연구
조행묵,정동화 한국마린엔지니어링학회 2004 한국마린엔지니어링학회지 Vol.28 No.3
In this paper, the effects of ethanol blended gasoline on emissions and their catalytic conversion efficiencies characteristics were investigated in gasoline engine with an electronic fuel injection. The results showed that the increase of ethanol concentration in the blended fuels brought the reduction of THC and $CO_2$ emissions from the gasoline engine. THC emissions were drastically reduced up to thirty percent. And brake specific fuel consumption was increased. but brake specific energy consumption was similar level. However. unburned ethanol and acetaldehyde emissions increased. The conversion efficiency of Pt/Rh based three-way catalysts and the effect of ethanol on CO and NOx emissions were investigated by the change of engine speed. load and air/fuel ratio. Furthermore, the ethanol blended fuel results in the reduction effect of THC. CO and NOx emissions at idle speed.
메탄을 혼합연료를 이용한 정적연소실내에서의 연소 특성에 관한 연구
조행묵,Cho Haeng Muk 한국마린엔지니어링학회 2005 한국마린엔지니어링학회지 Vol.29 No.2
The result of combustion experiment by using the methanol-gasoline blended fuel showed that the supplying pressure appeared the maximum pressure between equivalent rate 1.1 and 1.2. and the evaporation of the fuel has been known to have been greatly influenced by surrounding temperature and the combustion chamber temperature after being injected from the injector And it is confirmed that the rate of evaporation had been suddenly dropped according to the temperature in the combustion chamber though the injected foe) had been fully evaporated Such tendency has visibly appeared when the zone is leaner. and we recognize that the rich fuel supply is needed in the operation of cold operating.
Benefit Analysis of CNG as an Automobile Fuel
조행묵,Md. 이크발 마흐무드 한국청정기술학회 2009 청정기술 Vol.15 No.1
The adoption of compressed natural gas (CNG) as a vehicle fuel is a common phenomenon as it is accelerating worldwide. Increasing number of CNG driven vehicles around the world has jumped up from one million in 1996 to five million in 2006. CNG as a vehicle fuel is very popular to the end users because of its clean-burning properties and cost effective solution compared to other alternative fuels like diesel and gasoline. The use of CNG as a fuel reduces vehicular emission that is consisted of carbon monoxide (CO), hydrocarbons (HC), oxides of nitrogen (NOx), carbon dioxide (CO2) etc. This research highlights the characteristics of CNG vehicles, CNG arrangement in the vehicles, CNG fueling procedures and most importantly the environmental and economic factors that are highly considered as cost effective solution for the flexibility of using CNG in the automobiles.
Control of Water Heat Recovery Chiller Using Split Condenser Templifier Application
조행묵,Md. 이크발 마흐무드 한국에너지학회 2009 에너지공학 Vol.18 No.1
By using the heat recovery of water-cooled chillers, it is possible to reduce the energy operating costs positively and at the same time it could fulfill the heating re-heat air conditioning system as well as the hot water requirements. Basically templifiers are designed to economically to turn the waste heat into useful heat. Waste heat is extracted from a fluid stream by cooling it in the evaporator, the compressor amplifies the temperature of the heat and the condenser delivers the heat to heating loads such as space heating, kitchens and domestic hot water. Design of higher water temperature requirements and split condenser heat recovery chiller system (using of templifiers) produced hotter condenser water approximately up to 60ºC and control the entire heat recovery system.
조행묵,KanwarJabar Singh Gill,Khushpreet Singh,Bhupendra Singh Chauhan 한국에너지학회 2014 에너지공학 Vol.23 No.3
Simplified finite element model of spark ignition (SI) engine to analyse combustion heat transfer is presented. The model was discredited with 3D thermal elements of global length 5 mm. The fuel type is petrol. Internal nodal temperature of cylinder body is defined as 21000C to represent occurrence of gasoline combustion. Material information and isotropic material properties are taken from published report. The heat transfer analysis is done for the instant of combustion. The model is validated by comparing the computed maximum temperature at the piston surface with the published result. The computed temperature gradient at the crucial parts are plotted and discussed. It has been found that the critical top surface suffered from thermal and the materials used to construct the engine parts strongly influenced the temperature distribution in the engine. The model is capable to analyze heat transfer in the engine reasonably and efficiently.
알콜 혼합 연료를 사용한 전자제어 엔진의 배출가스 분석에 관한 연구
조행묵 公州大學校 工學硏究院 生産技術硏究所 2005 論文集 Vol.13 No.-
In this paper, the effects of ethanol blended gasoline on emissions and their catalytic conversion efficiencies characteristics were investigated in a electronic fuel injection gasoline engine. The results showed that the increase of ethanol concentration in the blended fuels brings about the reduction of THC and CO2 emissions from the gasoline engine were improved. THC emissions were drastically reduced by up to thirty percent. And brake specific fuel consumption was increased, but brake specific energy consumption could be improved. However, unburned ethanol and acetaldehyde emissions increased. The conversion efficiency of Pt/Rh based three-way catalysts and the the effect of ethanol on CO and NO_(x) emissions were investigated by the change of engine's speed, load and air/fuel ratio. Furthermore, the effect of ethanol blended fuel on the reduction of THC, CO and NO_(x) emissions at idle speed.