Evaluation of Low Exhaust in Wartsila 20V34SG Engine at PT Pjb Ubjom Pltmg Arun Lhokseumawe

Abstract

Practical work at PT PJB PLTMG Arun has been carried out under the title "Evaluation of Low Exhaust in Wartsila 20V34SG Engine at PT PJB UBJOM PLTMG ARUN Lhokseumawe", here will discuss the process of combustion and the causes of low exhasut. Where air and gas are fuels used for combustion processes. The process occurs in four steps, namely, 1. Inlet (suction step) that is there are two valves that will open for the entry of air and fuel, 2. Compression (compression step) that is fuel and mixed air will be obtained, 3. Combution ( combustion steps) i.e. compressed air is triggered by spark plugs and pilots so that combustion occurs in the combustion chamber, 4. Outlets (i.e. steps of combustion), the results of the combustion will be discharged through two valves with the piston moving upward. January 6, 2020 there was a low exhaust on the engine 7-Cylinder B-01, Cylinder B-02 and Cylinder B-03, this was caused when the engine speed had absolutely no load so there was no fuel for the combustion process inside the engine, previously checking was done first in Cold Cylinder Operation (CCO) in order to respect the engine so that it can run well, but it fails so that the spark plug turnover is immediately taken so that it can run again. January 13, 2020 low exhasement occurred on the same engine and cylinder, but there was already a load in the combustion process except that there were small particles attached to and piled up on the valve prechamber, so it had to be cleaned first but still using the same spark plug.