Nugroho, Eka Arisma Setyo (2015) Studi Numerik Pengaruh Kecepatan Angin Terhadap Critical Radius Dan Distribusi Temperatur Pada Pipa Uap. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Umumnya transmisi uap panas menggunakan pipa
dengan diameter yang besar. Pada transmisi uap panas tersebut,
kehilangan panas dan penurunan temperatur selalu terjadi.
Penambahan insulasi pada pipa uap panas akan sangat
menguntungkan, karena akan meminimalkan heat loss. Maka
perlu dilakukan penelitian guna menentukan critical radius dan
ketebalan optimum insulasi pada pipa uap panas.
Pada penelitian ini, proses analisa dilakukan dengan
menggunakan software gambit dan fluent. Pada gambit dilakukan
pembuatan domain simulasi dan meshing untuk diameter luar
pipa sebesar 168 mm dan diameter 30 mm. Kedua, dilakukan
penentuan kondisi batas pada kedua ukuran pipa. Ketiga,
dilakukan entry properties pada fluent, yaitu variasi kecepatan (1
m/s, 3 m/s, 5 m/s), temperatur uap panas (773 K), termperatur
sekeliling (300 K), material pipa dan insulasi serta nilai
konduktivitas masing-masing.
Hasil yang didapatkan pada penelitian ini adalah critical
radius tidak terjadi pada pipa dengan diameter luar 168 mm.
Sedangkan pipa dengan diameter 30 mm, terjadi pada ketebalan
insulasi 2 mm. Temperatur permukaan luar pipa tanpa insulasi
terendah didapatkan pada kecepatan angin 5 m/s sebesar 755,3K.
Heat loss terbesar terjadi pada pipa tanpa insulasi dengan
kecepatan angin 5 m/s dan ketebalan insulasi 0 mm sebesar
11953,6W/m dan terkecil pada kecepatan angin 1 m/s dengan
ketebalan insulasi 100 mm sebesar 264,38W/m. Sedangkan untuk
hasil teori, heat loss terbesar pada pipa tanpa insulasi dengan
kecepatan angin 5 m/s sebesar 11641,74W/m dan terkecil pada
pipa dengan insulasi 100 mm dengan kecepatan angin 1 m/s
sebesar 263,77W/m. Ketebalan optimum dari sumber panas
batubara sebesar 38 mm, sumber panas fuel oil sebesar 100 mm
dan sumber panas gas alam sebesar 43 mm.
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Generally, the steam transmission using large diameter
pipes . In this transmission, heat loss and decrease in temperature
always occur. The addition of insulation on steam piping will be
more advantages, as it will minimize heat loss. It is necessary to
research in order to determine the critical radius and the
optimum thickness insulation of the steam pipe .
In this study, the analyzes were performed using gambit
and fluent software. The domain and meshing were made in
gambit for the outer diameter 168 mm and 30 mm diameter.
Second, determining the boundary conditions on both the size of
the pipe. Third, entry the properties in fluent , which is variation
of wind speed ( 1 m / s , 3 m / s , 5 m / s ) , the steam temperature
( 773 K ) , souronding temperature ( 300 K ) , the pipe material
and insulation than each values of conductivity.
The results in this study are the critical radius does not
exist in the pipe with an outer diameter of 168 mm. While the pipe
with diameter of 30 mm, occurred in insulation thickness 2 mm.
The temperature of the outer surface of the pipe without
insulation obtained at the lowest wind speed of 5 m / s at 755,3K .
The largest Heat loss occurred in pipe doen’t insulation with
iv
wind speed of 5 m / s and the thickness of insulation 0 mm for
11953,6W / m and the smallest at wind speed of 1 m / s with a
thickness of insulation 100 mm in amount of 264,38W / m. As for
the theory results, the largest heat loss in the pipe without
insulation with a wind speed of 5 m / s for 11641,74W / m and the
smallest on the pipe with insulation 100 mm with a wind speed of
1 m / s for 263,77W / m. The optimum thickness of the heat source
from coal is 38 mm , the heat source from fuel oil in 100 mm and
natural gas heat source at 43 mm .
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSM 621.402 2 Nug s |
| Uncontrolled Keywords: | Critical radius, Distribusi Temperatur, Heat loss, Insulasi, Ketebalan Optimum, Pipa Uap Panas |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ217.6 Predictive Control T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1318 Geothermal Power Plants |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 09 Jun 2017 02:48 |
| Last Modified: | 24 Aug 2018 04:05 |
| URI: | http://repository.its.ac.id/id/eprint/41544 |
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