차량 적용을 위한 HCNG의 연소 및 배출가스 특성에 관한 연구

Nowadays, fuel receiving attention in the situation that we need alternative energy which is able to solve both the depletion of petroleum resources and environmental problems is natural gas and hydrogen. HCNG is an abbreviation of Hydrogen-Compressed Natural Gas and means fuel which is compound of natural gas and hydrogen. Natural gas is in the limelight as clean fuel because the reserve of it is a large mount and exhaust is less. However, compressed natural gas has slow rate of flame propagation and low limit of flammability. This drawback makes mileage and efficiency worse comparing to existing fuel. In order to make up for the drawback, hydrogen which has fast rate of flame propagation is added, then it makes limit of flammability high. in case of using this fuel with an engine, lean burn can be possible. It makes not only combustion efficiency better but also combustion temperature lower because of lean burn. So, formation of NO x is fundamentally stopped and it finally makes NO x emission reduced dramatically. H/C rate of HCNG fuel is higher than existing fossil fuel, which is advantage of it. An increase of H/C rate can cause reduction of greenhouse gas emission by a decrease of creating CO₂ per on the unit energy. Combustion characteristics were confirmed by CVC experiment and reduction of NO x and CO₂ was ascertained by Chassis Dynamometer experiment.