CNG 기관의 수소혼합률 변화에 따른 성능 및 배출가스 특성에 관한 실험적 연구 = An Experimental Study on Performance and Emission Characteristics of Hydrogen Mixtures in a CNG Engine

다국어 초록 (Multilingual Abstract)

Recently, the world faces the environmental problem such as air pollution due to harmful gas discharged from car and abnormal climate due to the green-house gases increased by the discharge of CO2. Compressed Natural Gas (CNG), one of alternative for this problem, is less harmful, compared to the existing fossil fuel, as gaseous fuel, and less carbon in fuel ingredients and carbon dioxide generation rate relatively favorable more than the existing fuel. However, CNG fuel has the weakness of slow flame propagation speed and difficult fast burn. On the other hand, hydrogen does not include carbon in fuel ingredients, and does not discharge harmful gas such as CO and HC. Moreover, it has strength of quick burning velocity and ignition is possible with small ignition energy source and it`s has wide Lean Flammability Limit. If using this hydrogen with CNG fuel, the characteristics of output and discharge gas is improved by the mixer’s burning velocity improved, and, at the same time, is possible to have stable lean combustion with the reduction of CO2 expected. Therefore, this research tries to identify the characteristics of engine and emission gas when mixing CNG fuel and hydrogen in each portion and burning them in spark igniting engine, and grasp the combustion stability and emission gas characteristics according and use it as the basic data of hydrogen-CNG premixed engine.

참고문헌 (Reference)

1 김종현, "싸이클론 유동을 이용한 예혼합 다단연소기의 NOx 및 CO 배출특성" 한국연소학회 13 (13): 7-13, 2008

2 John B. Heywood, "Internal Combustion Engine Fundamenteals" McGraw-Hill 1988

3 Thomas Wallner, "Efficiency and Emissions Potential of Hydrogen Internal Combustion Engine Vehicles" SAE 2011

4 최경호, "Effect of Hydrogen Enriched LPG Fuelled Engine with Converted from a Diesel Engine" 한국에너지학회 15 (15): 139-145, 2006

5 In-Tak Kim, "Development of HMC LPI Mono- Fuel Vehicle" SAE 2012

6 Kijong Kim, "An Experiamental Study Combustion and Emission Characteristics of Hydrogen Enriched LPG fuel in a Constant Volume Chamber" 360-366, 2012

7 Sangyeon Won, "A Study on the Development of Hydrogen-Natural gas Dual fuel engine" KSAE 2010

8 Dongkyun Ko, "A Study on the Combustion and Emission Characteristics of HLPG in Constant Volume Chamber" Graduate School of Automotive Engineering Kookmin University 2012

9 Dongkyun Ko, "A Study on the Combustion and Emission Characteristics of HCNG for Vehicle Application" KSAE 2010