Methane Emissions Evaluation on Natural Gas/Diesel Dual-Fuel Engine during Scavenging Process

F. M. Felayati, Semin*, B. Cahyono

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

Natural gas/diesel dual-fuel engine is known as a solution for shipping industries to simultaneous reduces NOx and PM emissions nowadays. Unfortunately, high HC emissions are produced, especially at low loads conditions. However, there are two possibilities for the source of HC emissions from the engine, namely during the combustion process and during the scavenging process. This study evaluates the methane emissions (part of HC emissions) concentration during the scavenging process. Cold flow engine simulations are evaluated and validated to this study at low load condition using natural gas injection at intake port during valve overlap. Moreover, several natural gas injection timings are conducted to observe the effect on the methane emissions concentrations at exhaust port after the exhaust valve closed. The natural gas penetration is nearly after the intake valve closed (IVC) thus the natural gas enters the combustion chamber at the next intake cycle. It observed that the scavenging process contributes to the methane emissions formation on natural gas/diesel dual-fuel engine using intake port natural gas penetration after IVC. Besides, the concentration of methane emissions during the scavenging process has very low contribution than the combustion process. It is possibly a variation of the methane emissions concentration in the other valve lift profile and natural gas injection strategies. Thus, it recommends to widely observing how significant the methane emissions generated during the scavenging process on the other engines with those variations.

Original languageEnglish
Article number012036
JournalIOP Conference Series: Earth and Environmental Science
Volume698
Issue number1
DOIs
Publication statusPublished - 22 Mar 2021
Event8th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management, ISOCEEN 2020 - Surabaya, Virtual, Indonesia
Duration: 27 Oct 202028 Oct 2020

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