Homogeneous charge compression ignition (HCCI) is a potentially attractive operating mode for stationary natural gas engines. Increasing demand for efficient, clean burning engines for electrical power generation provides an opportunity to utilize HCCI combustion if several inherent difficulties can be overcome. Fuel composition, particularly the higher hydrocarbon content (ethane, propane, and butane) of the fuel is of primary concern. Fuel composition influences HCCI operation both in terms of design, via compression ratio and initial charge temperature, and in terms of engine control. It has been demonstrated that greater concentrations of higher hydrocarbons tend to lower the ignition temperature of the mixture significantly. The purpose of this paper is to demonstrate, through simulation, the effect of fuel composition on combustion in HCCI engines. Engine performance over a range of fuels from pure methane to more typical natural gas blends is investigated. This includes both the impact of various fuels and the sensitivity of engine operation for any given fuel. Results are presented at a fixed equivalence ratio, compression ratio, and engine speed to isolate the effect of fuel composition. Conclusions are drawn as to how the difficulties arising from gas composition variations may affect the future marketability of these engines.

Issue Section:
Internal Combustion Engines
Keywords:
internal combustion engines, combustion, ignition, electric power generation, fuel
Topics:
Engines, Fuels, Homogeneous charge compression ignition engines, Ignition, Natural gas, Simulation, Temperature, Combustion, Methane, Thermal efficiency, Compression
1.
Ricardo, H. R., 1922, The Internal Combustion Engine, Vol. I, Blackie and Son Limited, London, pp. 385–414.
2.
Kimura, S., Aoki, O., Ogawa, H., Muranaka, S., and Enomoto, Y., 1999, “New Combustion Concept for Ultra-Clean and High Efficiency Small DI Diesel Engines,” SAE Paper Number 1999-01-3681.
3.
Christensen, M., Johansson, B., and Einewall, P., 1997, “Homogeneous Charge Compression Ignition (HCCI) Using Isooctane, Ethanol and Natural Gas—A Comparison with Spark Ignited Operation,” SAE Paper Number 972874.
4.
Christensen, M., Johansson, B., Amneus, P., and Mauss, F., 1998, “Supercharged Homogeneous Charge Compression Ignition,” SAE Paper Number 980787.
5.
Christensen, M., and Johansson, B., 1998, “Influence of Mixture Quality on Homogeneous Charge Compression Ignition,” SAE Paper Number 982454.
6.
Christensen, M., Hultqvist, A., and Johansson, B., 1999, “Demonstrating the Multi Fuel Capability of a Homogeneous Charge Compression Ignition Engine With Variable Compression Ratio,” SAE Paper Number 1999-01-3679.
7.
Christensen, M., and Johansson, B., 1999, “Homogeneous Charge Compression Ignition with Water Injection,” SAE Paper Number 1999-01-0182.
8.
Ishibashi, Y., and Asai, M., “Improving the Exhaust Emissions of Two-Stroke Engines by Applying the Activated Radical Combustion,” SAE Paper Number 960742.
9.
Amneus, P., Nilsson, D., Mauss, F., Christensen, M., and Johansson, B., 1998, “Homogeneous Charge Compression Ignition Engine: Experiments and Detailed Kinetic Calculations,” The Fourth International Symposium on Diagnostics and Modeling of Combustion in Internal Combustion Engines, Engine Systems Division, JSME.
10.
Smith, J. R., Aceves, S. M., Westbrook, C., and Pitz, W., 1997, “Modeling of Homogeneous Charge Compression Ignition (HCCI) of Methane,” ASME, New York, ICE-Vol. 29-3.
11.
Flowers, D., Aceves, S., Westbrook, C. K., Smith, J. R., and Dibble, R., 1999, “Sensitivity of Natural Gas HCCI Combustion to Fuel and Operating Parameters Using Detailed Kinetic Modeling,” ASME Fall Technical Conference.
12.
Aceves
,
S. M.
,
Smith
,
J. R.
,
Westbrook
,
C. K.
, and
Pitz
,
W. J.
,
1999
, “
Compression Ratio Effect on Methane HCCI Combustion
,”
ASME J. Eng. Gas Turbines Power
,
121
,
569
569
.
13.
Aceves, S. M., Flowers, D. L., Westbrook, C. K., Smith, J. R., Pitz, W., Dibble, R., Christensen, M., and Johansson, B., 2000, “A Multi-Zone Model for Prediction of HCCI Combustion and Emissions,” SAE Paper Number 2000-01-0327.
14.
Maigaard, P., Mauss, F., and Kraft, M., 2000, “Homogeneous Charge Compression Ignition Engine: A Simulation Study on the Effects of Inhomogeneities,” Spring Engine Technology Conference, Internal Combustion Engine Division, ASME, New York.
15.
Fiveland, S. B., and Assanis, D. N., 2000, “A Four-Stroke Homogeneous Charge Compression Ignition Engine for Combustion and Performance Studies,” SAE Paper Number 2000-01-0332.
16.
Flowers, D., Aceves, S., Smith, R., Torres, J., Girard, J., and Dibble, R., 2000, “HCCI in a CFR Engine: Experiments and Detailed Kinetic Modeling,” SAE Paper Number 2000-01-0328.
17.
Ichikura, et al., 1996, “Combustion Chamber Wall Temperature and Combustion Stability,” Engine Technology and Progress in Japan, Alternative Fuels and Engines, Oct., Chap. 4.
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