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

scholarly journals Improving Efficiency, Extending the Maximum Load Limit and Characterizing the Control-Related Problems Associated With Higher Loads in a 6-Cylinder Heavy-Duty Natural Gas Engine

2010 ◽  
Author(s):  
Mehrzad Kaiadi ◽  
Per Tunestal ◽  
Bengt Johansson
Keyword(s):  
Natural Gas ◽  
Compression Ratio ◽  
Diesel Engines ◽  
Maximum Load ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Heavy Duty ◽  
Load Limit ◽  
Overall Efficiency ◽  
Exhaust Gas Temperature

High EGR rates combined with turbocharging has been identified as a promising way to increase the maximum load and efficiency of heavy duty spark ignition Natural Gas engines. With stoichiometric conditions a three way catalyst can be used which means that regulated emissions can be kept at very low levels. Most of the heavy duty NG engines are diesel engines which are converted for SI operation. These engine’s components are in common with the diesel-engine which put limits on higher exhaust gas temperature. The engines have lower maximum load level than the corresponding diesel engines. This is mainly due to the lower density of NG, lower compression ratio and limits on knocking and also high exhaust gas temperature. They also have lower efficiency due to mainly the lower compression ratio and the throttling losses. However performing some modifications on the engines such as redesigning the engine’s piston in a way to achieve higher compression ratio and more turbulence, modifying EGR system and optimizing the turbocharging system will result in improving the overall efficiency and the maximum load limit of the engine. This paper presents the detailed information about the engine modifications which result in improving the overall efficiency and extending the maximum load of the engine. Control-related problems associated with the higher loads are also identified and appropriate solutions are suggested.

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

Using Pilot Diesel Injection in a Natural Gas Fueled HCCI Engine

2002 ◽  
Author(s):  
Weidong Gong ◽  
Stuart R. Bell ◽  
Gerald Micklow ◽  
Scott B. Fiveland ◽  
Martin L. Willi
Keyword(s):  
Natural Gas ◽  
Hcci Engine ◽  
Diesel Injection ◽  
Gas Fueled

Investigation of a Combined Refrigeration and Air Conditioning System Based on Two-Phase Ejector Driven by Exhaust Gases of Natural Gas Fueled Homogeneous Charge Compression Ignition Engine

2021 ◽  
Vol 143 (12) ◽  
Author(s):  
Abdul Khaliq ◽  
Bandar A. Almohammadi ◽  
Mathkar A. Alharthi ◽  
Mohd Asjad Siddiqui ◽  
Rajesh Kumar
Keyword(s):  
Natural Gas ◽  
Air Conditioning ◽  
Equivalence Ratio ◽  
Homogeneous Charge Compression Ignition ◽  
Combined Cycle ◽  
Compression Ignition ◽  
Two Phase ◽  
Evaporator Temperature ◽  
Hcci Engine ◽  
Gas Fueled

Abstract A natural gas-fueled homogeneous charge compression ignition (HCCI) engine is coupled to an exhaust gas operated turbine driven two-phase ejector cycle to generate power and cooling energy, simultaneously. By establishing a thermodynamic model, the simulation of the proposed system and its parametric analyses are conducted. Energetic and exergetic investigations are carried out to study the role of equivalence ratio, engine speed, condenser temperature, refrigeration evaporator temperature, air-conditioning evaporator temperature, and ejector nozzle efficiency on the thermodynamic performance parameters of the combined cycle. The analysis of two-phase ejector cooling cycle using three working fluids including R717, R290, and R600a is conducted. Results reveal that the thermal efficiency of HCCI engine is increased from 47.44% to 49.94%, and for the R600a operated combined cycle it is increased from 60.05% to 63.26% when the equivalence ratio is promoted from 0.3 to 0.6. Distribution of fuel exergy results show that out of 100% exergy input, in case of R717 operated combined cycle, 139.79 kW (38.72%) is the total exergy output, and 164.21 kW (45.49%) and 57 kW (15.79%) are the values for exergy destruction and exergy losses. It is further shown that change in refrigerant minorly influence the percentages of exergy distribution.

scholarly journals Investigation of important semi-empirical heat transfer models for a natural gas-fueled HCCI engine

2021 ◽  
Vol 7 ◽  
pp. 8652-8666
Author(s):  
Masoud Rabeti ◽  
Ali Akbar Ranjbar ◽  
Omid Jahanian ◽  
Seyed Mohammad Safieddin Ardebili ◽  
Hamit Solmaz
Keyword(s):  
Heat Transfer ◽  
Natural Gas ◽  
Hcci Engine ◽  
Gas Fueled ◽  
Semi Empirical ◽  
Transfer Models

3D CFD simulation of a natural gas fueled HCCI engine with employing a reduced mechanism

Fuel ◽  
2016 ◽  
Vol 182 ◽  
pp. 816-830 ◽  
Author(s):  
Kamran Poorghasemi ◽  
Rahim Khoshbakhti Saray ◽  
Keyvan Bahlouli ◽  
Alborz Zehni
Keyword(s):  
Natural Gas ◽  
Cfd Simulation ◽  
Hcci Engine ◽  
Reduced Mechanism ◽  
Gas Fueled

Effect of Additives on Combustion Characteristics of a Natural Gas Fueled HCCI Engine

2014 ◽  
Author(s):  
Jean-Baptiste Masurier ◽  
Fabrice Foucher ◽  
Guillaume Dayma ◽  
Philippe Dagaut
Keyword(s):  
Natural Gas ◽  
Combustion Characteristics ◽  
Hcci Engine ◽  
Effect Of Additives ◽  
Gas Fueled

Study on the combustion characteristics of a high compression ratio HCCI engine fueled with natural gas

Fuel ◽  
2019 ◽  
Vol 255 ◽  
pp. 115701 ◽  
Author(s):  
Zhongshu Wang ◽  
Guizhi Du ◽  
Zhijie Li ◽  
Xiaoyan Wang ◽  
Dan Wang
Keyword(s):  
Natural Gas ◽  
Compression Ratio ◽  
Combustion Characteristics ◽  
High Compression Ratio ◽  
Hcci Engine ◽  
High Compression
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