Ali, M. Syarifudin (2016) ANALISA KEGAGALAN PRIMARY SUPERHEATER TUBE PADA BERBAGAI KONDISI OPERASI DENGAN CFD SOFTWARE DI BOILER UNIT 1 PT.PJB UP GRESIK. Other thesis, POLITEKNIK PERKAPALAN NEGERI SURABAYA.
Full text not available from this repository.Abstract
ABSTRAK Superheater merupakan salah satu modul yang terdapat pada boiler yang berfungsi penghasil superheated steam yang bertekanan tinggi, sehingga terjadinya kegagalan dimungkinkan sangat kecil agar tidak mengganggu operasional produksi. Penelitian ini dilakukan atas masalah yang dihadapi oleh modul superheater yaitu pada bagian primary superheater outlet yang terjadi penipisan dinding tube dan creep damage pada PLTU Unit 1 PT.PJB UP Gresik. Analisa menggunakan pendekatan dengan CFD (Computational Fluid Dynamics) dan Static Structure. Kegagalan dimungkinkan karena perbedaan distribusi mass flow steam yang diterima setiap tube. Dengan memvariasikan mass flow inlet, digunakan simulasi single phase untuk melihat distribusi pressure dan temperatur pada daerah kegagalan. Kemudian digunakan simulasi 2D Surface untuk melihat distribusi pressure dan temperatur pada bagian luar tube. Dari hasil 2D Surface digunakan untuk input simulasi static structure. Pada static structure dilihat menggunakan teori kegagalan Von-Mises. Dari simulasi single phase dan static structure, dievaluasi penyebab kegagagalan pada sisi atas primary superheater. Sehingga didapatkan evaluasi life time dan prosedur penguranngan terjadinya kegagalan pada primary superheater. Dari hasil simulasi single phase, didapatkan mass flow pada sisi inlet 73.2 ton/h, 68.43 ton/h, dan 66.31 ton/h yang mengindikasikan contour merah pada daerah kegagalan. Temperature dan pressure pada bagian atas tube adalah 523.47°C dan 5.56e+7 Pa. Dari hasil static structural memperkuat hipotesa dengan equivalent stress minimum terletak pada daerah kegagalan dengan besar 4.38e+7 Pa. Sehingga dapat disimpulkan tekanan internal lebih besar dari tekanan eksternal sehingga tube mengalami pecah (creep). Kata kunci : CFD software, creep damage, primary superheater,STBA 42 ABSTRACT Superheater is one the modules contained in the boiler that serves producing superheated high-pressure steam, therefore that possible failure is very small so as not to interfere with the operation. This research was carried out on the problems faced by the superheater outlet tube wall thinning and creep damage at the power plant PT. PJB UP Gresik Unit 1. Analysis approach to CFD ( Computational Fluid Dynamics ) and Static Structure. Failure is possible due to the distributionof steam mass flow received by each tube. By varying the inlet mass flow, used simulated single phase to see the distribution of ressure and temperature in the area of failure. 2D Surface is then used simulations to see the distribution of pressure and temperature on the outside of the tube. From the results of 2D Surface is used for simulation input static structure. In the static structure is viewed using the theory of Von-Mises failure. Single phase of the simulation and static structure, evaluated the causes The failure on the upper side primary superheater. So we get the life time of evaluation and procedures penguranngan a failure occurs on the primary superheater. From the simulation results single phase, obtained mass flow on the inlet side 73.2 ton/h, 68.43 ton/h, and 66.31 ton/h which indicate red contour in the area of failure. Temperature and pressure at the top of the tube is 523.47°C and 5.56e+7 Pa. From the results strengthen the hypothesis with the static structural stress equivalent minimum located in areas with a large failure 4.38e+7 Pa. Therefore we can conclude the internal pressure is greater than the external pressure so that the tube rupture (creep). Keywords : CFD software, creep damage, primary superheater,STBA 42
| Item Type: | Thesis (Other) |
|---|---|
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Jurusan Teknik Permesinan Kapal > D4 Teknik Perpipaan |
| Depositing User: | Unnamed user with email repository@ppns.ac.id |
| Date Deposited: | 18 Sep 2018 03:50 |
| Last Modified: | 18 Sep 2018 03:50 |
| URI: | http://repository.ppns.ac.id/id/eprint/847 |
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