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http://dx.doi.org/10.7842/kigas.2015.19.6.28

Effects of CNG Heating Value on Combustion Characteristics of a Diesel-CNG Dual-Fuel Engine  

Kim, Yongrae (Korea Institute of Machinery and Materials)
Jang, Hyeongjun (Department of Mechanical Engineering, Gachon University)
Lee, Janghee (Korea Institute of Machinery and Materials)
Kim, Changgi (Korea Institute of Machinery and Materials)
Publication Information
Journal of the Korean Institute of Gas / v.19, no.6, 2015 , pp. 28-33 More about this Journal
Abstract
In this study, a dual fuel engine fueled with natural gas and diesel was tested to investigate the effects of heating value variation of CNG fuel. CNG substitution rate which is defined as the ratio of CNG and diesel supplied in a heating value basis was fixed at 80%. The higher heating value was varied from $10,400kcal/Nm^3$ to $9,400kcal/Nm^3$ by mixing nitrogen gas with pure CNG and diesel fuel was injected at a fixed injection timing. The engine test results showed that thermal efficiency and power output were decreased as the heating value of mixed CNG fuel was decreased. And the peak cylinder pressure was also decreased but the ignition delay time and the combustion duration and timing were almost same.
Keywords
dual fuel engine; heating value variation; cng substitution rate; thermal efficiency;
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Times Cited By KSCI : 3  (Citation Analysis)
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