Volume No. 3 Issue No.: 2 Page No.: 407-420 Oct-Dec 2008

 

STUDY OF CNG, HCNG THEIR PERFORMANCE AND EMISSIONS AND THE DEVELOPMENT OF A SOFTWARE FOR ANALYSIS OF MASS EMISSION DRIVING CYCLE (MEDC)

 

Prashant Kumar* and Aditya Kapoor

Birla Institute of Technology and Science (BITS) Pilani, Goa campus, Goa (INDIA)

 

Received on : September 30, 2008

 

ABSTRACT

 

Our work focuses on a study of the natural gas based fuels like CNG and HCNG (Hydrogen blended with CNG). It gives a clear comparison of such fuels with the conventional fuels like diesel and gasoline, weighing the merits and demerits of each. The comparative study is done taking into account the various parameters like air-fuel ratio, load conditions and engine speeds and their effects on the engine efficiency. Results of the tests performed to check for the feasibility of using hydrogen blended CNG as a fuel are also discussed. The study proves a definite advantage of using hydrogen blended compressed natural gas since it provides higher flame speeds and can greatly improve the efficiency of the fuel in the lean operating region. We have tried to discuss the effects of blending on the combustion and other fuel properties. Apart from this, the kinetics of formation of NOx has been studied. We have developed a software that can be used for the direct analysis of mass emission and velocity acceleration data obtained from a GPS system. Our software helps in identification of the parameter values such that the results obtained from a test cycle would very closely match those on a full run and gives the value of a total of 27 driving cycle parameters. The software can be used for the analysis of driving patterns in various areas. The driving cycle data of different locations in the world can be analyzed with the help of our software to determine the world standards for vehicle manufacturing.

 

Keywords : CNG, Emission comparisons of CNG, HCNG, Combustion properties of HCNG, NOx emission kinetics, Idling time, Driving cycle, Microtrip.

 

 

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