Effects of gas composition on the performance and emissions of compressed natural gas engines

Byung Hyouk Min, Jin Taek Chung, Ho Young Kim, Simsoo Park

    Research output: Contribution to journalArticlepeer-review

    33 Citations (Scopus)

    Abstract

    Natural gas is considered to be a promising alternative fuel for passenger cars, truck transportation and stationary engines providing positive effects both on the environment and energy security. However, since the composition of natural gas fuel varies with location, climate and other factors, it is anticipated that such changes in fuel properties will affect emission characteristics and performance of CNG (Compressed Natural Gas) engines. The purpose of the present study is to investigate the effects of the difference in gas composition on the engine performance and emission characteristics. The results show that THC (Total Hydrocarbon) decreases with increasing WI (Wobbe Index) and MCP (Maximum Combustion Potential). On the other hand, it is observed that NOx slightly increases as WI and MCP increase. The TLHV (Total Lower Heating Value of Intake) is proposed in this study as a potential index for compatibility of gas fuels in a CNG engine. There is a variation in power up to 20% depending on the composition of gas when the A/F ratio and spark timing are fixed for a specific gas fuel.

    Original languageEnglish
    Pages (from-to)219-226
    Number of pages8
    JournalKSME International Journal
    Volume16
    Issue number2
    DOIs
    Publication statusPublished - 2002 Feb

    Keywords

    • CNG (Compressed Natural Gas)
    • Emission
    • Gas Composition
    • MCP (Maximum Combustion Potential)
    • Total Lower Heating Value of Intake (TLHV)
    • WI (Wobbe Index)

    ASJC Scopus subject areas

    • Mechanical Engineering

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