Djamil, Naura Abida (2018) Pengaruh Pemasangan Hexagonal Bar Terhadap Laju Perpindahan Panas Pada Bottom Slope Tube Untuk Boiler Berkapasitas 600 Mw. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Komponen utama PLTU adalah boiler, turbin uap, condenser, dan pompa. Pada furnace, proses pembakaran batu bara dengan suhu yang sangat tinggi dan kualitas bahan bakar (batu bara) yang rendah mengakibatkan terbentuknya slag-slag yang menempel pada beberapa komponen yang berada di atas furnace seperti superheater dan reheater. Slag-slag yang menumpuk akan jatuh mengenai beberapa bottom slope tube yang mengakibatkan kecacatan fisik maka perlu dipertimbangkan pemberian proteksi pada bottom slope tube tersebut dengan menambahkan hexagonal bar di atasnya. Selain sebagai pelindung terhadap kecacatan pipa karena kejatuhan slag, hexagonal bar juga berfungsi sebagai sirip. Untuk itu perlu dianalisis pengaruh pemasangan hexagonal bar terhadap laju perpindahan panas dari flue gas ke air di dalam tube.
Penelitian ini dilakukan dengan analisis perpindahan panas konduksi, konveksi di dalam tube, konveksi di luar tube dan radiasi dari flue gas ke permukaan bottom slope tube tanpa dan dengan adanya hexagonal bar untuk mendapatkan laju perpindahan panas pada bottom slope tube. Hexagonal bar yang dianlaisis berupa satu segmen, tiga segmen dan lima segmen dengan width of fin yang berbeda sepanjang bottom slope tube. Data pendukung yang digunakan adalah data desain dan data operasi meliputi data flue gas, air, bottom slope tube, dan hexagonal bar.
Hasil dari penelitian ini adalah q_(tanpa fin)= 7.896 MW ; q_(1 segmen)= 11.841 MW ; q_(3 segmen)= 11.327 MW ; q_(5 segmen)= 11.073 MW . Pemasangan hexagonal bar pada bottom slope tube meningkatkan nilai total heat transfer rate. Total heat transfer rate maksimal pada bottom slope tube menggunakan 1 segmen (hexagonal bar) dengan width of fin 15.5 m sebesar q_(1 fin)= 11.841 MW.
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The main components of PLTU are boiler, steam turbine, condenser, and pump. In the furnace, the process of burning coal with very high temperatures and influenced by the quality of fuel (coal) resulted in the formation of slag-slag attached to some components that are above the furnace such as superheater and reheater. The accumulated slags will fall on some bottom slope tubes causing physical defect, it is necessary to consider the protection of the bottom slope tube by adding a hexagonal bar on it. In addition to protecting against pipe defects due to falling slag, hexagonal bars also serve as flippers. It is therefore necessary to analyze the effect of Hexagonal bar installation on the rate of heat transfer from flue gas to water in the tube.
This study was carried out with analysis of conduction heat transfer, convection in the tube, convection outside the tube and radiation from flue gas to the surface of the bottom slope tube without and in the presence of a hexagonal bar to obtain a heat transfer rate on the bottom slope tube. Hexagonal bars are analyzed in the form of one segment, three segments and five segments with different width of fin along the bottom slope tube. The supporting data used are design data and operating data including flue gas, water, bottom slope tube, and hexagonal bar data.
The result of this research is q_(tanpa fin)= 7.896 MW ; q_(1 segmen)= 11.841 MW ; q_(3 segmen)= 11.327 MW ; q_(5 segmen)= 11.073 MW . Installation of the hexagonal bar on the bottom slope tube increases the total heat transfer rate. Maximum total heat transfer rate on bottom slope tube using 1 segment (hexagonal bar) with width of fin 15.5 m by q_(1 segmen)= 11.841 MW.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Hexagonal Bar, Laju Perpindahan Panas, Bottom Slope Tube, Konveksi, Radiasi |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Naura' Abida Djamil |
| Date Deposited: | 02 Aug 2021 21:42 |
| Last Modified: | 02 Aug 2021 21:42 |
| URI: | http://repository.its.ac.id/id/eprint/57789 |
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