Studi Numerik Pengaruh Sudut Baffle Pada Economizer Hopper Terhadap Karakteristik Aliran Dan Daya Tangkap Fly Ash

Juwantoko, Doni (2025) Studi Numerik Pengaruh Sudut Baffle Pada Economizer Hopper Terhadap Karakteristik Aliran Dan Daya Tangkap Fly Ash. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Economizer hopper merupakan komponen penting pada boiler pembangkit Listrik karena berperan menjaga keandalan komponen air preheater dengan menangkap fly ash yang nantinya ditampung pada economizer hopper, economizer hopper dapat ditingkatkan performanya dengan penambahan baffle, Di mana baffle mampu memberikan efisiensi yang lebih baik
dibandingkan economizer hopper tanpa baffle dalam menangkap fly ash. Penelitian terus dilakukan guna meningkatkan performa economizer hopper. Dalam penelitian ini, akan dikaji pengaruh sudut baffle economizer hopper terhadap karakteristik aliran flue gas dan daya tangkap. Model saluran economizer outlet digunakan untuk memodelkan jalur aliran flue gas. Pengaruh sudut baffle dianalisis dalam ANSYS Computational Fluid Dynamic dengan pendekatan discrete phase modelling dengan hasil yang diamati berupa flue gas velocity, flue gas pressure, flue gas temperature, konsentrasi fly ash pada hopper. Diharapkan bahwa variasi
sudut baffle akan memberikan pengaruh signifikan terhadap peningkatan daya tangkap fly ash, sehingga dapat mengoptimalkan performa economizer hopper. Dengan penambahan baffle mampu meningkatkan efisiensi penangkapan fly ash dan penurunan jumlah particle yang lolos menuju air preheater, penambahan baffle juga menyebabkan velocity flue gas meningkat. Peningkatan velocity diiringi dengan peningkatan nilai pressure drop, dengan nilai maksimum sebesar 359.8 Pa pada sudut 25°. Sedangkan pada temperature flue gas outlet relative stabil. Sudut baffle 30° memberikan performa terbaik, dengan penangkapan fly ash terbaik dengan
penangkapan sebesar 79.41% dan particle lolos hanya 20.59%, dan pressure drop sebesar 320.2 Pa.
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Economizer hopper is an important component in power plant boilers because it plays a role in maintaining the reliability of the preheater water component by capturing fly ash which will be accommodated in the economizer hopper, economizer hopper can be improved with the addition of baffles, where baffles are able to provide better efficiency than economizer hopper without baffles in capturing fly ash. Research continues to be conducted to improve the performance of the economizer hopper. In this study, the effect of economizer hopper baffle angle on flue gas flow characteristics and capture power will be studied. The economizer outlet channel model is used to model the flue gas flow path. The effect of baffle angle is analyzed in
ANSYS Computational Fluid Dynamic with discrete phase modeling approach with observed results in the form of flue gas velocity, flue gas pressure, flue gas temperature, fly ash concentration in the hopper. It is expected that variations in baffle angle will have a significant
effect on increasing fly ash capture power, so as to optimize the performance of the hopper economizer. With the addition of baffles able to increase the capture efficiency of fly ash and decrease the number of particles that escape into the preheater water, the addition of baffles also causes the velocity of the flue gas to increase. The increase in velocity is accompanied by an increase in pressure drop value, with a maximum value of 359.8 Pa at an angle of 25°. While the outlet flue gas temperature is relatively stable. The 30° baffle angle gave the best
performance, with the best fly ash capture with 79.41% capture and only 20.59% escaped particles, and a pressure drop of 320.2 Pa.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Sudut Baffle, Daya Tangkap Fly ash Economizer Hopper, Baffle Angle, Fly ash Capture Efficiency
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction T Technology > TJ Mechanical engineering and machinery > TJ263.5 Boilers (general)
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	doni juwantoko
Date Deposited:	31 Jul 2025 08:16
Last Modified:	31 Jul 2025 08:16
URI:	http://repository.its.ac.id/id/eprint/124806

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