Ignition Characteristics of Methanol and Natural-Gas in a HCCI Engine Assisted by DME

2007 ◽  
Author(s):  
Sukho Jung ◽  
Masahiro Ishida ◽  
Hironobu Ueki ◽  
Daisaku Sakaguchi
Keyword(s):  
Natural Gas ◽  
Hcci Engine ◽  
Ignition Characteristics

scholarly journals Combustion of premixed DME and natural gas in a HCCI engine

2005 ◽  
Vol 121 (2) ◽  
pp. 20-29
Author(s):  
Masahiro ISHIDA ◽  
Sukho JUNG ◽  
Hironobu UEKI ◽  
Daisaku SAKAGUCHI
Keyword(s):  
Natural Gas ◽  
Equivalence Ratio ◽  
Combustion Process ◽  
Reaction Rates ◽  
Gas Mixture ◽  
Temperature Reaction ◽  
Load Range ◽  
Hcci Engine ◽  
Test Engine ◽  
Ignition Characteristics

The objectives of the present study is to clarify ignition characteristics, the combustion process, the knock limit and the misfire limit of natural gas mixed with a small amount of dimethyl ether (DME) in a HCCI engine. In the combustion test, natural gas and a small amount of DME were charged into the suction air homogeneously. The equivalence ratio of natural gas was increased to find the knock limit or the misfire limit of the HCCI test engine under a constant DME amount. The effect of the natural gas addition on suppression of the low temperature reaction of DME, and the effects of the DME amount and the intake temperature on the reaction rates, the knock limit of the DME/natural gas mixture, and the operation load range of the HCCI engine were investigated experimentally.

Ignition Characteristics of Ethane and Its Roles in Natural Gas for HCCI Engine Operation

2015 ◽  
Vol 8 (2) ◽  
pp. 307-328 ◽  
Author(s):  
Hiroki Tanaka ◽  
Kazunobu Kobayashi ◽  
Takahiro Sako ◽  
Yasuyuki Sakai ◽  
Masahiro Furutani ◽  
...  
Keyword(s):  
Natural Gas ◽  
Engine Operation ◽  
Hcci Engine ◽  
Ignition Characteristics

scholarly journals Compression Ratio Influence on Maximum Load of a Natural Gas Fueled HCCI Engine

2002 ◽  
Author(s):  
Jan-Ola Olsson ◽  
Per Tunestål ◽  
Bengt Johansson ◽  
Scott Fiveland ◽  
Rey Agama ◽  
...  
Keyword(s):  
Natural Gas ◽  
Compression Ratio ◽  
Maximum Load ◽  
Hcci Engine ◽  
Gas Fueled

Effects of Heterogeneous EGR on the Natural Gas Fueled HCCI Engine Using Experiments, CFD and Detailed Kinetics

2004 ◽  
Author(s):  
Ryuichi Tominaga ◽  
Satoshi Morimoto ◽  
Yasuharu Kawabata ◽  
Shigeto Matsuo ◽  
Toshiji Amano
Keyword(s):  
Natural Gas ◽  
Hcci Engine ◽  
Gas Fueled ◽  
Detailed Kinetics

F24 Effect of EGR on characteristics of combustion and exhaust emission in a DME/Natural Gas-HCCI engine

2006 ◽  
Vol 2006.59 (0) ◽  
pp. 153-154
Author(s):  
Daisuke NOGUCHI ◽  
Miki YOSHIMURA ◽  
Suk-ho JUNG ◽  
Masahiro ISHIDA ◽  
Hironobu UEKI
Keyword(s):  
Natural Gas ◽  
Exhaust Emission ◽  
Hcci Engine

Homogeneous Charge Compression Ignition (HCCI) Engine Fueled With Natural Gas for Stationary Power Generation Applications

2006 ◽  
Author(s):  
Chol-Bum M. Kweon ◽  
John M. Pratapas ◽  
David E. Foster
Keyword(s):  
Power Generation ◽  
Natural Gas ◽  
Thermal Efficiency ◽  
Engine Oil ◽  
Intake Manifold ◽  
Boost Pressure ◽  
Oxides Of Nitrogen ◽  
Gas Combustion ◽  
Hcci Engine ◽  
Excess Air

In this study, a single-cylinder HCCI engine was used to study the technical feasibility of HCCI engines for stationary power generation applications. The compression ratio (CR) of the engine was set at 13.8:1 considering a hybrid system with diesel micro-pilot injection. The engine was operated under various loads at a rated speed of 1800 rpm. Intake manifold temperature of the air/fuel mixture was used to control the start of combustion (SOC) of the HCCI engine. Oil and coolant temperatures were set at 100°C. Location of peak in-cylinder pressure (PPL) was maintained within 6∼9°ATDC in order to obtain maximum thermal efficiency by initiating the SOC between 2∼4°BTDC. Intake boost was increased up to 2.5 bar absolute to increase engine power output. Results of the HCCI combustion were also compared with those of diesel and diesel micro-pilot natural gas combustion. The results showed that the required intake temperature ranged from 149°C to 261°C depending on engine loads. The highest net mean effective pressure (NMEP) was about 10.6 bar. Higher intake boost pressure would increase NMEP even higher. Maximum indicated thermal efficiency (ITE) was about 49% at the excess air ratio (λ) of 3.2 and maximum combustion efficiency was about 94% at λ = 2.6. Oxides of nitrogen (NOx) emissions were below 10 ppm when λ was above 3. At these excess air ratios, in the good HCCI operating regimes, carbon monoxide (CO), total hydrocarbons (THC), and methane (CH4) were equivalent to those of conventional natural gas engines.

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