Evaluasi Overhaul terhadap Konsumsi HSD PLTDG Pesanggaran

Eri Prabowoa (Institut Teknologi Perusahaan Listrik Negara (ITPLN))
Trassanda Scudetto Widestomo Putra (Institut Teknologi Perusahaan Listrik Negara (ITPLN))
Indra Kusumah Disastra (Institut Teknologi Perusahaan Listrik Negara (ITPLN))

Jurnal Teknik Mesin
Vol 2 No 2 (2026)

High Speed Diesel (HSD) consumption is a critical operating variable for diesel-gas power plants because it directly affects fuel cost, engine performance, and generating-unit reliability. This article evaluates HSD fuel consumption of the Wartsila 18V50DF engine at PLTDG 200 MW Pesanggaran, Bali, before and after overhaul. The study uses quantitative analysis of performance-test data from Unit 02 and Unit 05 at several operating-hour intervals. Calculations include effective power, indicated power, charge efficiency, combustion-air requirement, air-fuel ratio, hourly fuel consumption, and brake specific fuel consumption. The results show that overhaul reduced HSD consumption in all observed comparisons. Unit 02 decreased from 4888.91 to 2653.98 L/h at 18000 h, from 6425.42 to 4330.17 L/h at 36000 h, and from 5168.27 to 5098.43 L/h at 48000 h. Unit 05 decreased from 4330.19 to 4260.32 L/h at 36000 h and from 5517.48 to 5168.27 L/h at 48000 h. The improvement is associated with restoration of combustion components, cleaner air supply, and reduced combustion deposits after overhaul.