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http://dx.doi.org/10.7842/kigas.2021.25.2.34

Countermeasures to the Introduction of Low Caloric Gas Fuel for Natural Gas Engine  

Park, Cheol-Woong (Engine Research Team, Korea Institute of Machinery and Materials)
Kim, Chang-gi (Engine Research Team, Korea Institute of Machinery and Materials)
Oh, Se-Chul (Engine Research Team, Korea Institute of Machinery and Materials)
Lee, Jang-Hee (Engine Research Team, Korea Institute of Machinery and Materials)
Publication Information
Journal of the Korean Institute of Gas / v.25, no.2, 2021 , pp. 34-41 More about this Journal
Abstract
In order to cope with the problems that may occur when the natural gas used in Korea becomes low in calories, the problems that may have to the domestic industrial gas equipment must be identified in advance, and based on this, countermeasures for efficient use of energy must be preceded. In this study, in order to solve the problem of deterioration of engine output performance and efficiency due to the introduction of low calorific gas when using a lean-burning natural gas engine that complies with the EURO-6 regulation, specific control plans and results based on the experiment are intended to be presented. In order to identify the improvement effect by the control variable represented by the ignition timing under the full load condition at the engine speed of 1,400 rpm and 550 Nm, 2,100 rpm, which is the engine speed at the rated operation condition, the thermal efficiency and exhaust gas characteristics were identified and optimized by changing the ignition timing for each gas fuel. In the case of pure methane, which shows the lowest value based on the torque under the full load condition, if the ignition timing is advanced by about 2 CAD from the reference ignition timing, the torque can be compensated without a large increase in NOx emission.
Keywords
low caloric gas; natural gas engine; countermeasures; torque; ignition timing;
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