Putra, Aditya Primadi (2015) Studi Numerik Karakteristik Pembakaran Batubara, Dengan Variasi Laju Aliran Massa Swirl Air dan Panjang dimensi Extension Pipe Pada Rancangan Start Up Burner. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Saat ini kebutuhan minyak (HSD) untuk cold start PLTU sangat
tinggi. Harga BBM yang terus meningkat membuat biaya operasi PLTU
menjadi tinggi karena masih menggunakan BBM untuk start up. Biaya
start-up yang sedemikian tinggi memunculkan ide penggunaan Burner
kombinasi berbahan bakar Minyak dan Batubara yang ditargetkan akan
dapat mengurangi konsumsi minyak hingga 70% nya. Dimana bukan
solar yang digunakan untuk start up tetapi pulverized coal yang langsung
dibakar.
Penelitian dilakukan menggunakan metode Computational
Fluid Dynamics (CFD) untuk menganalisa model extension pipe startup
burner yang sudah dirancang dengan variasi laju aliran massa pada swirl
air. Pembuatan geometri start up burner menggunakan GAMBIT 2.4.6,
sedangkan untuk simulasi numerik menggunakan Ansys Fluent 14.0.
Simulasi yang dilakukan yaitu memasukkan model turbulensi, materials,
operating conditions, boundary conditions, solution, initialize, dan
monitor residual. Model tubulensi yang digunakan adalah model
turbulensi k-ε standard. Material yang digunakan adalah serbuk batubara
dan udara. Boundary condition yang ditetapkan yaitu mass flow untuk
Carrier air, coal dan swirl air. Kemudian untuk pengaturan outlet sebagai
pressure outlet.
Hasil yang didapatkan dari hasil simulasi ini bahwa penambahan
laju aliran massa pada swirl air yang optimum sebesar 0,061 kg/s untuk
setiap desain geometri extension pipe, sedangkan laju pembakaran yang
terbesar didapatkan dari desain extension chamber 150 mm dengan laju
aliran massa 0,061 kg/s.
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Currently the demand for oil (HSD) for cold start high power
plants. Increasing fuel prices make power plant operating costs are high
because they use the fuel to start up. Start-up costs so high that led to the
idea of using a combination of fuel Burner Oil and Coal targeted will
reduce oil consumption by up to 70% of them. Where instead of diesel
fuel that is used to start up but the pulverized coal is burned directly.
The study was conducted using Computational Fluid Dynamics
(CFD) to analyze models extension pipe burner startup that has been
designed with variations in the mass flow rate of swirl air. Making a startup
burner geometry using GAMBIT 2.4.6, while for the numerical
simulation using ANSYS FLUENT 14.0. Simulations were performed
which include turbulence models, materials, operating conditions,
boundary conditions, solution, initialize, and monitor residual.
Turbulence models used are k-ε turbulence model standard. The material
used is pulverized coal and air. Boundary condition stipulated that the
mass flow air for Carrier, coal and swirl air. Then for setting the outlet as
the outlet pressure.
The results obtained from the simulation results that the addition
of the mass flow rate at the optimum swirl air of 0.061 kg/s for each design
geometry extension pipe, whereas the largest firing rate obtained from the
design of the extension chamber of 150 mm with a mass flow rate of 0.061
kg/s.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSM 620.106 4 Put s |
| Uncontrolled Keywords: | start up burner, pulverized, batubara, fluent, simulasi, pembakaran, swirl air. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ223 PID controllers T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 09 Jun 2017 03:21 |
| Last Modified: | 24 Aug 2018 04:28 |
| URI: | http://repository.its.ac.id/id/eprint/41552 |
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