Pakpahan, Angelia Trifosa (2025) Laporan Kerja Praktek I 20 Januari 2025-28 April 2023 di PT PLN Nusantara Power UP Paiton Unit 9. Project Report. [s.n]. (Unpublished)
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Abstract
Sistem pelumasan lube oil system merupakan subsistem kritis yang berperan dalam menjamin keandalan, efisiensi, dan umur pakai komponen mekanis pada peralatan berputar. Degradasi kualitas pelumas dapat meningkatkan laju keausan komponen, menurunkan kinerja sistem, serta meningkatkan risiko kegagalan operasi. Analisis dilakukan melalui evaluasi hasil pengujian laboratorium terhadap kondisi pelumas dan komponen gearbox. Parameter yang dianalisis meliputi pembentukan foaming, kontaminasi partikel (particle contamination), kandungan air (water content), kandungan sulfur aktif, serta tingkat kebersihan (oil cleanliness). Selain itu, kinerja boiler dievaluasi melalui perhitungan efisiensi menggunakan metode tidak langsung (indirect method) berdasarkan data operasi aktual pembangkit. Hasil analisis menunjukkan bahwa kontaminasi partikel, kandungan air, dan karakteristik kimia pelumas merupakan faktor dominan yang memengaruhi degradasi pelumas dan mempercepat mekanisme keausan pada komponen gearbox. Evaluasi boiler menunjukkan bahwa variasi efisiensi dipengaruhi oleh karakteristik batubara, terutama nilai kalor dan kandungan kelembaban, dengan kehilangan panas terbesar disebabkan oleh tingginya kadar air dalam bahan bakar yang menurunkan efisiensi pembakaran. Penerapan condition-based maintenance melalui pemantauan kondisi pelumas secara berkala, pengendalian kontaminasi, serta pengelolaan kualitas bahan bakar menjadi strategi yang efektif untuk meningkatkan keandalan sistem pelumasan gearbox, mengurangi risiko kegagalan peralatan, dan mempertahankan efisiensi operasi pembangkit.
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The lube oil system is a critical subsystem that ensures the reliability, operational efficiency, and service life of rotating mechanical equipment. Lubricant degradation may accelerate component wear, reduce system performance, and increase the risk of operational failure. The analysis was conducted through laboratory evaluation of lubricant and gearbox component conditions. The investigated parameters included foaming, particle contamination, water content, active sulfur content, and oil cleanliness. In addition, boiler performance was evaluated by calculating boiler efficiency using the indirect method based on actual plant operating data. The results indicate that particle contamination, water content, and the chemical characteristics of the lubricant are the dominant factors affecting lubricant degradation and accelerating wear mechanisms in gearbox components. The boiler performance evaluation showed that efficiency variations were primarily influenced by coal quality, particularly its calorific value and moisture content, with the highest heat loss attributed to the high moisture content of the fuel, which reduced combustion efficiency. The implementation of condition-based maintenance through periodic lubricant condition monitoring, contamination control, and fuel quality optimization is an effective strategy for improving the reliability of the gearbox lubrication system, minimizing the risk of equipment failure, and maintaining efficient and sustainable power plant operation.
| Item Type: | Monograph (Project Report) |
|---|---|
| Uncontrolled Keywords: | Coal Mill, Gearbox, Sistem Pelumasan, Degradasi Pelumas, Condition-Based Maintenance, Efisiensi Boiler, Pembangkit Listrik Tenaga Uap (PLTU). ================================================================== Coal Mill, Gearbox, Lubrication System, Lubricant Degradation, Condition-Based Maintenance, Boiler Efficiency, Steam Power Plant. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ1058 Rotors T Technology > TJ Mechanical engineering and machinery > TJ1077 Lubrication and lubricants. T Technology > TJ Mechanical engineering and machinery > TJ1225 Milling machines numerically controlled T Technology > TJ Mechanical engineering and machinery > TJ174 Maintenance and repair of machinery |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Angelia Trifosa Pakpahan |
| Date Deposited: | 30 Jul 2026 02:25 |
| Last Modified: | 30 Jul 2026 02:25 |
| URI: | http://repository.its.ac.id/id/eprint/139961 |
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