Studi Numerik Pengaruh Kecepatan Angin Terhadap Critical Radius Dan Distribusi Temperatur Pada Pipa Uap

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. ============================================================================================ 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 > (S1) Undergraduate Theses
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 09 Jun 2017 02:48
Last Modified: 09 Jun 2017 02:48
URI: http://repository.its.ac.id/id/eprint/41544

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