Rivanto, Pascal Septian (2025) Pemodelan Interval Waktu Optimal Pergantian Pada Komponen Pulverizer Menggunakan Metode Faillure Mode Effect Criticality Analysis (FMECA) Berdasarkan Variabel Proses Di PLTU Unit 1x660 MW. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
sistem pulverizer sebagai komponen penting dalam proses pembakaran batu bara. Namun, frekuensi kerusakan pada komponen penting yang menyebabkan tingginya downtime dan menurunkan keandalan sistem. Untuk itu, dilakukan pemodelan interval waktu optimal pergantian komponen menggunakan metode Failure Mode Effect and Criticality Analysis (FMECA) dan pendekatan age replacement untuk meninjau komponen yang memiliki potensi kerusakan tertonggi. Berdasarkan FMECA, diperoleh tiga komponen kritis yaitu grinding roller (RPN: 294), bull ring (RPN: 240), dan liner (RPN: 210). Interval optimal pergantian komponen grinding roller ditentukan pada 1512 jam (hari ke-63) dengan downtime minimal D(tp) sebesar 0,01386597, sedangkan bull ring pada 1320 jam (hari ke-55) dengan D(tp) sebesar 0,02161597. Setelah diterapkannya replacement, nilai keandalan rata-rata (Rm(tp)) berada di 65%. Pemodelan variabel proses dilakukan dengan mendeteksi kenaikan flowrate, differential pressure, dan karakteristik batubara. analisis variabel proses menunjukkan bahwa terdapat rata-rata kumulatif deteksi sebesar 82 kali pada grinding roller, 45 kali pada bull ring dan 46 kali pada liner. Hasil penelitian ini dapat digunakan sebagai dasar perencanaan pemeliharaan preventif berbasis waktu age replacement dan deteksi kumulatif variabel proses untuk meningkatkan keandalan komponen pulverizer secara keseluruhan.
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a pulverizer system as an important component in the coal combustion process. However, the frequency of failures in critical components causes high downtime and reduces system reliability. Therefore, optimal component replacement interval modeling was performed using the Failure Mode Effect and Criticality Analysis (FMECA) method and age replacement approach to review components with the highest failure potential. Based on FMECA, three critical components were obtained: grinding roller (RPN: 294), bull ring (RPN: 240), and liner (RPN: 210). The optimal replacement interval for the grinding roller component was determined at 1512 hours (day 63) with minimal downtime D(tp) of 0.01386597, while the bull ring at 1320 hours (day 55) with D(tp) of 0.02161597. After implementing the replacement, the average reliability value (Rm(tp)) was at 65%. Process variable modeling was performed by detecting increases in flowrate, differential pressure, and coal characteristics. Process variable analysis showed that there were cumulative detection averages of 82 times for grinding roller, 45 times for bull ring, and 46 times for liner. The results of this research can be used as a basis for time-based preventive maintenance planning using age replacement and cumulative detection of process variables to improve the overall reliability of pulverizer components.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | FMECA, Age Replacement, Pulverizer, Variabel Proses FMECA, Age Replacement, Pulverizer, Process Variable |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA169 Reliability (Engineering) |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Pascal Septian Rivanto |
| Date Deposited: | 04 Aug 2025 04:06 |
| Last Modified: | 04 Aug 2025 04:06 |
| URI: | http://repository.its.ac.id/id/eprint/124497 |
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