Experimental Test for Exhaust Gases  Recirculation System Diagnostic Based on Gas Index Coefficient

Amortila, Valentin

doi:10.5593/sgem2017/41/s19.055

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“…3, b) the by-pass of a part of exhaust gas (moved from engine cylinders to the exhaust manifold then to the turbine ) can be assured either to the TC of low pressure or (as in one stage charger) into the exhaust gas funnel. During the by-pass of exhaust gas fl ow, it has been throttling to the pressure less than the exhaust gas pressure beside TC [40]. This prevents gas injection and stagnation of gas fl ow, coming from turbine.…”

Section: Literature Review / Pregled Literaturementioning

confidence: 99%

Supplying of Marine Diesel Engine Ecological Parameters

Sagin¹,

Kuropyatnyk²,

Zablotskyi³

et al. 2022

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The by-pass system of exhaust gas for the engine 6L20 Wartsila has been observed. The requirements of Annex VI MARPOL towards nitrogen oxide concentration in ship engine exhaust gases have been provided. The purpose of research was the determination of diesel 6L20 Wartsila by-pass exhaust gases optimum volume – at this the nitrogen oxide minimal concentration in exhaust gases is assured, the minimal increase (comparing with operation mode without by-pass) – specific effective fuel consumption, supporting of necessary thermal factor diapason of engine cylinders. The research was performed for the exhaust gas by-pass diapason 0…10 % with engine load diapason 0.55…0.85 % from nominal power. Upon experimental results it has been stated that the exhaust gas by-pass usage favors the ecological parameters of ships engine operation modes – by this at the range of exploitation load 0.55…0.85 % from nominal power the nitrogen oxide concentration in exhaust gas is decreased to 1.32….12.97 %. The exhaust gas by-pass impairs the combustion process and favors the increasing of specific effective fuel consumption and increasing the temperature of exhaust gases. The exhaust gas by-pass system effectiveness assessment should be performed by complex estimation of the following engine operation parameters: the nitrogen oxide concentration in exhaust gas, increasing of specific effective fuel consumption(SFOC), the exhaust gas temperature. As optimal degree of exhaust gas by-pass value when the maximum decrease of nitrogen oxide emission at minimal increase of fuel consumption and simultaneous engine thermal factor handling has to be considered.

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Section: Literature Review / Pregled Literaturementioning

confidence: 99%