Analisis Pengaruh Furnace Chamber Shape Pada Mild Combustion Menggunakan Metode Computational Fluid Dynamic

Hanggiayi, Klora (2019) Analisis Pengaruh Furnace Chamber Shape Pada Mild Combustion Menggunakan Metode Computational Fluid Dynamic. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 02311540000080-Undergraduate_Thesis.pdf Restricted to Repository staff only Download (1MB) | Request a copy

Abstract

Teknologi pembakaran dengan kualitas pembakaran yang baik dapat menghasilkan temperature flame yang optimal serta emisi NOx yang rendah. MILD Combustion merupakan salah satu teknologi pembakaran yang mampu menurunkan temperature peak flame sehingga dapat memberikan temperature yang uniform di dalam ruang pembakaran. MILD Combustion dapat dicapai dengan adanya flue gas recirculation untuk menaikkan temperatur preheated serta memberikan pengenceran pada oxidizer.
Pada penelitian Tugas Akhir ini dilakukan penelitian mengenai efek furnace chamber shape pada MILD Combustion dengan menggunakan tipe pembakaran partially premixed combustion. Terdapat 5 variasi utama pada penelitian ini yaitu geometri furnace yang divariasikan sudut antara atap dan dinding furnace yaitu α=80°, α=85°, α=90°, α=95° dan α=100°. Pada setiap geometri furnace akan divariasikan besarnya equivalent ratio yaitu Ø=0,9 ; Ø=0,8 ; dan Ø=0,7. Dari hasil simulasi menggunakan metode numerik CFD (Computational Fluid Dynamic) menunjukkan dengan penggunaan MILD Combustion, temperature peak yang dicapai tidak terlalu tinggi, dimana kenaikan temperature tertinggi adalah 463° K.
Variasi sudut α akan memberikan perbedaan temperature peak yang dapat dicapai. Pada sudut α yang semakin besar akan memberikan temperature peak yang semakin rendah. Sehingga temperature peak terendah terdapat pada furnace dengan sudut α=100°. Sedangkan pada equivalent ratio yang semakin mendekati 1 akan memberikan temperature peak yang semakin tinggi pula. Dimana pada penelitian Tugas Akhir ini didapatkan temperature peak terendah pada equivalent ratio 0,7. Sedangkan untuk emisi NOx akan semakin meningkat seiring dengan kenaikan temperature peak yang dicapai oleh pembakaran didalam furnace.
===============================================================================================================================
Good combustion technology is expected to produce an optimal flame temperature while minimizing NOx emissions. One such technology is MILD (Moderate or Intense Low-oxygen Dilution) combustion, which reduces the maximum flame temperature and provides a more uniform temperature distribution within the combustion chamber. MILD combustion is achieved through flue gas recirculation, which increases the oxidizer preheating temperature and promotes oxidizer dilution. This study investigates the effect of furnace chamber geometry on MILD combustion using a partially premixed combustion system. Five furnace configurations were examined by varying the angle between the furnace roof and walls at α = 80°, 85°, 90°, 95°, and 100°. For each geometry, three equivalence ratios were analyzed, namely Ø = 0.9, Ø = 0.8, and Ø = 0.7. Numerical simulations were performed using Computational Fluid Dynamics (CFD), and the results showed that MILD combustion maintained relatively low maximum temperatures, with the highest temperature increase reaching only 463 K. The furnace angle significantly influenced the peak combustion temperature, where increasing the angle α resulted in a lower peak temperature. The lowest peak temperature was obtained with the furnace angle of α = 100°. In contrast, equivalence ratios closer to 1 produced higher peak temperatures, while the lowest peak temperature was achieved at an equivalence ratio of Ø = 0.7. Furthermore, the results indicated that NOx emissions increased with increasing peak combustion temperature.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	MILD Combustion, Partially Premixed Combustion, Furnace Chamber Shape
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ785 Internal combustion engines. Spark ignition
Divisions:	Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Klora Hanggiayi
Date Deposited:	13 Nov 2024 01:48
Last Modified:	21 Jul 2026 04:54
URI:	http://repository.its.ac.id/id/eprint/68971

Actions (login required)

View Item