Experimental Analysis of Gas Split Injection Effect on Dual-Fuel Engine Performance

Abstract

⎯ the application of a dual-fuel engine has massively been used as the main engine. However, in dual-fuel engine operations, problems occur in low-load operations. The combustion quality with unstable combustion conditions and relatively low thermal efficiency. In this research, a gas split injection strategy was implemented on the dual-fuel engine. The purpose of this research is to compare the performance of the engine between dual-fuel operations using gas split injection strategy and single injection. Furthermore, split injection is a fuel injection system by dividing the injection into several injection stages with a certain mass and period. This injection system was applied on a dual-fuel engine system, which was previously a modification of the conventional diesel Yanmar TF 85 MH. The variation in this study is the injection split ratio (ISR) 75-25, variations in injection time, and variations in load with specified engine speed at 2000 RPM. The results obtained in this study are the best variations found in ISR 75-25 gas split injection with injection distance at 260°bTDC & 244°bTDC. Due to the injection distance, a significant difference occurred in all parameters tested between single injection and split injection. The significance of the difference in power, torque, BMEP, SFOC, and the thermal efficiency only occurs at 100% load, which is 4.3%; 4.2%; 4.2%; 16%; 18.3%.

Testing the Inclination of an Industrial Diesel Engine Under Static Conditions According to the International Convention for the Safety of Life at Sea (SOLAS) Regulations

“…Due to the unstable working environment of the ship's engine due to the influence of waves, it is feared that the resulting engine performance value will also not be good, if usually engine performance testing is limited to fuel variations such as the effect of modifying the timing of natural gas injection on engine performance [12], a combination of biodiesel from microalgal [13], variations of biodiesel fuel from animal oils [14], determination of engine performance values with biodiesel from palm oil mill effluent (POME) [8] and calculation of performance values using corn oil [7]. All of these research was carried out under normal engine conditions (not in tilted conditions) or in the sense that they were only to test engine performance, for offshore.…”

Biodiesel Production from POME (Palm Oil Mill Effluent) and Effects on Diesel Engine Perfor-mance

“…For the performance of the engine itself, many studies have been carried out related to the modification of the fuel used, ranging from the performance of dual fuel engines such as modification of CNG fuel injection timing on engine performance [13], modification of Biodiesel fuel mixture from microalgal [14], modification of fuel Biodiesel mixture from animal oil [15], corn oil biodiesel [16], all of which studies show a relatively better performance value in terms of reducing emissions, reducing SFC, increasing thermal efficiency, but in terms of power and torque the engine is still better with this fuel diesel oil fuel.…”