Prabowo, Kurniadi Heru (2015) Studi Numerik Karakteristik Aliran Dan Perpindahan Panas Pada Tube Platen Superheater Pltu Pacitan. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Studi kasus pada PLTU unit Pacitan dengan kapasitas beban 2x315 MWe.
Boiler merupakan salah satu main unit dalam sistem PLTU dengan tube
superheater sebagai pemanas. Tujuan penelitian ini untuk mengetahui laju
perpindahan panas di tube platen superheater (PSH).
Penelitian ini diawali dengan pembuatan geometri model 2D, meshing, dan
menentukan boundary condition dengan software GAMBIT 2.4.6. Dengan
software fluent 6.3.26, mode penyelesaian menggunakan k-epsilon enhanced wall
treatment, persamaan energy, SIMPLEC. Variasi yang digunakan adalah beban
operasi boiler maximum continuous rate dan boiler maximum rate.
Hasil dari simulasi ini adalah nusselt number rataan terbesar terjadi pada
grup tube PSH 1 sisi inlet. Tidak ada perbedaan signifikan distribusi nusselt
number pada grup tube PSH dalam kedua variasi beban operasi. Pada sudut 90°<
θ <180°, nusselt number lokal rataan tube PSH 13C sisi inlet meningkat 92,2%
terhadap tube PSH 12C sisi inlet. Pada sudut 0°< θ < 90°, nusselt number lokal
rataan tube PSH 13C sisi outlet meningkat 40,6% terhadap tube PSH 12C sisi
outlet. Hal ini menunjukkan laju perpindahan panas tube PSH dengan longitudinal
pitch ratio 1,11 adalah kurang baik.
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Study case in PLTU Pacitan with load 2x315 MWe. Boiler is a main unit in
PLTU system with superheater tubes as heat exchanger. The purpose of this study
is knows heat transfer in platen superheater (PSH) tubes.
The study begin from makes 2D geometry model, meshing, filling boundary
condition with GAMBIT 2.4.6. Software fluent 6.3.26 used k-epsilon enhanced
wall treatment, energy, SIMPLEC as solver mode. The load variation in this study
used boiler maximum continuous rate dan boiler maximum rate.
The conclusion this study is biggest average of nusselt number occurred at
1st group of PSH tubes. There is no significantly different of nusselt number
distribution on the both load variation. In angle 90°< θ <180°, average of local
nusselt number on 13rd C inlet side increase 92,2% than average of local nusselt
number on 12nd C inlet side. In angle 0°< θ < 90°, average of local nusselt
number on 13rd C outlet side increase 40,6% than average of local nusselt
number on 12nd C outlet side. Thats mean heat transfer of PSH tubes with
longitudinal pitch ratio 1,11 is not good.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTM 621.402 2 Pra s |
| Uncontrolled Keywords: | Nusselt number, aligned tubebanks, longitudinal pitch ratio, pemodelan CFD. |
| Subjects: | T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21101-(S2) Master Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 22 Jun 2017 03:03 |
| Last Modified: | 24 Aug 2018 04:12 |
| URI: | http://repository.its.ac.id/id/eprint/41811 |
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