Hutomo, Nugroho Setyo (2020) Studi Numerik Pengaruh Sudut Tilt Burner Terhadap Rear Pass Temperature Boiler Pltu Banten 1 Suralaya Pada Kondisi Batubara LRC Dan MRC. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Batubara sebagai bahan bakar utama boiler mempunyai pengaruh yang dominan terhadap karakteristik pembakaran dan penyerapan panas di boiler. Variasi spesifikasi batubara yang berasal dari berbagai macam suplier yang berbeda memerlukan pengaturan terhadap pola pengoperasian boiler agar efisiensi pembakaran dapat ditingkatkan dan kegagalan pada pipa-pipa boiler dapat dicegah. Salah satu fasilitas untuk pengaturan pola pembakaran pada boiler adalah dengan setting pada sudut tilt burner. Pengaturan ini digunakan untuk mengarahkan aliran dan pembentukan fireball di area furnace. Akan tetapi, pengaturan setting tilt burner tersebut sulit untuk dilakukan secara langsung pada saat boiler beroperasi karena dapat mempengaruhi kestabilan dan keandalan operasi boiler. Oleh karena itu, data simulasi diperlukan untuk memberikan prediksi perubahan setting sudut tilt burner terhadap kondisi pembakaran pada boiler, khususnya rear pass temperature. Penelitian ini menggunakan metode simulasi numerik pada software CFD untuk mengetahui data temperatur pada area boiler rear pass serta deviasi temperatur di sisi left dan right untuk input nilai kalor yang berbeda. Data output simulasi selanjutnya diproses dengan metode gabungan backpropagation neural network-genetic algorithm (BPNN-GA) untuk mendapatkan setting sudut tilt burner pada nilai kalor batubara tertentu yang dapat menurunkann deviasi temperatur left dan right side boiler dan meminimalkan boiler rear pass temperature. Penelitian menghasilkan sudut tilt burner optimal +3O untuk batubara LRC dan +14O untuk batubara MRC-LRC. Sudut tilt burner +3O menghasilkan deviasi rear pass temperature sebesar 11,94 K dengan temperatur sisi A dan B berturut-turut sebesar 811,99 K dan 823,93 K. Sedangkan deviasi temperatur pada sudut +14O adalah 20,36 K dengan rear pass temperature sisi A dan B berturut-turut sebesar 867,4 K dan 887,75 K. Disamping menurunkan deviasi temperatur sisi A dan B, sudut tilt burner +3O juga menghasilkan peningkatan pemerataan temperatur pada area furnace sebesar 39,95% dan peningkatan penyerapan panas pada susunan heat exchanger sebesar 3,66%. Begitu juga pada posisi sudut tilt burner +14O, pemerataan temperatur pada area furnace meningkat sebesar 56,17% sedangkan penyerapan panas pada susunan superheater meningkat sebesar 1,73%.
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As the main fuel, coal plays an important role in the boiler’s characteristics of combustion and heat absorption. Variations in coal specifications influenced by differences in suppliers will cause the need for adjustments of the boiler operating pattern so that combustion efficiency can be improved and failure on boiler pipes can be prevented. One of the facilities for setting the combustion pattern on the boiler is the tilt burner angle setting. This setting is used to direct the flow and formation of fireballs in the furnace area. However, it is difficult to be directly conducted in the operating condition because it will affect the boiler’s stability and reliability. Therefore, simulation data is required to predict the suitable setting of the tilt burner angle regarding the combustion conditions, especially the rear pass temperature. This research applied a numerical simulation method using the CFD software to identify the temperature data in the boiler rear pass area and the temperature deviation between the left and right sides based on different heat values. The simulation result then was proceed using the combination of backpropagation neural network and genetic algorithm (BPNN-GA) to obtain the setting of the tilt burner angle based on the certain heat value of coal. This setting of the tilt burner angle is able to minimize the temperature deviation between the left and right sides and the rear pass temperature of the boiler. The research resulted in the optimal tilt burner angle of +3O for LRC coal and +14O for MRC-LRC coal. The tilt burner angle +3O produced a rear pass temperature deviation of 11.94 K while the side temperatures of A and B equal to 811.99 K and 823.93 K, respectively. In addition, the temperature deviation at the angle of +14O was 20.36 K while the rear pass side temperatures A and B were 867.4 K and 887.75 K, respectively. Besides decreasing temperature deviation of sides A and B, tilt burner angle +3O also increased the uniformity of the temperature in the furnace area by 39.95% and increased heat absorption in the heat exchangers at 3.66%. Likewise, the temperature uniformity of the furnace area at the tilt burner angle of +14O also increased by 56.17% while the heat absorption in the superheater arrangement increased by 1.73%.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTM 621.183 Hut s-1 |
| Uncontrolled Keywords: | calorific value, tilt burner, rear pass temperature, combustion characteristic , fireball, CFD, BPNN-GA |
| 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: | Nugroho Setyo Hutomo |
| Date Deposited: | 05 Mar 2025 07:46 |
| Last Modified: | 05 Mar 2025 07:46 |
| URI: | http://repository.its.ac.id/id/eprint/75333 |
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