Munif, Khabib (2020) Analisa Kerusakan Dan Perhitungan Sisa Umur Tube Superheater Boiler PLTU Suralaya Unit 7. Masters thesis, Institut Teknologo Sepuluh Nopember.
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Abstract
PLTU masih menjadi pemasok utama sistem kelistrikan di Indonesia, salah satunya adalah PLTU Suralaya unit 7 yang sudah beroperasi sejak tahun 1995. Salah satu peralatan utama di PLTU adalah boiler. Boiler berfungsi untuk mengubah air (feed water) menjadi uap panas lanjut (superheated steam). Salah satu komponen utama di boiler adalah superheater yang berfungsi memaksimalkan penyerapan panas dan meningkatkan effisiensi boiler. Kerusakan pada tube boiler ini dapat berdampak besar dalam proses produksi dan menimbulkan kerugian. Boiler yang sudah lama beroperasi juga diperlukan assessment untuk mengetahui sisa umur yang mungkin dimiliki boiler. Proses identifikasi diawali dengan mencari faktor-faktor penyebab terjadinya kerusakan. Pengujian dilakukan terhadap bagian sampel yang representatif yang dapat memberikan informasi tentang karakteristik material. Selain itu dilakukan juga pengujian creep untuk dapat menghitung sisa umur tube superheater boiler. Dari proses analisis diperoleh kesimpulan bahwa kerusakan tube adalah thick lip rupture dan thin lip fish mouth rupture. Thick lip rupture disebabkan karena creep dimana tube terekspos pada temperatur tinggi dan thin lip fish mouth rupture disebabkan karena erosi dan fly/coal ash corrosion, yang mana tube terekspos pada temperatur tinggi dalam waktu singkat. Perhitungan untuk prediksi sisa umur tube, menujukkan sisa umur terendah adalah 3,1 tahun.
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The steam power plant is still the main supplier of electrical systems in Indonesia, one of which is the Suralaya steam power plant unit 7 which has been operating since the year 1995. One of the main equipment in the steam power plant is a boiler. Boiler serves to convert water (feed water) into hot steam further (superheated steam). One of the main components in the boiler is the superheater that serves to maximize heat absorption and increase the efficiency of the boiler. The damage to this boiler tube can have a major impact on the production process and inflict losses. Long-running boilers are also required assessment to know the remaining lifespan that the boiler may have. The identification process begins with finding the cause of damage. Testing is conducted against a representative portion of the sample that can provide information on material characteristics. Besides it is also done testing creep to be able to calculate the remaining life of the tube superheater boiler. From the process of analysis obtained the conclusion that tube damage is thick lip rupture and thin lip fish mouth rupture. Thick lip rupture is caused by creep where the tube is exposed at high temperature and thin lip fish mouth rupture caused by erosion and flies/coal ash corrosion, which tube is exposed at high temperature in a short time. The calculation for the prediction of the remaining life tube, showing the lowest remaining lifespan is 3.1 years.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTM 621.183 Mun a-1 |
| Uncontrolled Keywords: | Boiler, superheater, tube damage, remaining life tube. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ263.5 Boilers (general) |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21101-(S2) Master Thesis |
| Depositing User: | Khabib Abdul Munif |
| Date Deposited: | 05 Mar 2025 05:38 |
| Last Modified: | 05 Mar 2025 05:38 |
| URI: | http://repository.its.ac.id/id/eprint/75324 |
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