Combustion Analysis Of Biogas-Hydrogen Blends In The Can Combustor Of A Micro Gas Turbine

Ihsan, Muhammad (2025) Combustion Analysis Of Biogas-Hydrogen Blends In The Can Combustor Of A Micro Gas Turbine. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini menyelidiki karakteristik pembakaran dari biogas dan biogas yang diperkaya hidrogen pada combustor turbin gas mikro, dengan fokus pada bahan bakar yang berasal dari lumpur limbah, tempat pembuangan sampah, air limbah, dan metanasi syngas, serta melakukan perbandingan terhadap gas alam. Penelitian ini menganalisis parameter-parameter utama seperti distribusi temperatur, pola garis arus (streamline), keseragaman temperatur pada keluaran, fraksi campuran, dan emisi polutan (NO dan CO). Lima konfigurasi bahan bakar—100% biogas, 25% biogas-75% hidrogen, 50% biogas-50% hidrogen, 75% biogas-25% hidrogen, dan 100% hidrogen—diteliti dengan variasi fraksi mol hidrogen menggunakan simulasi ANSYS Fluent.
Hasil penelitian menunjukkan bahwa penambahan hidrogen secara signifikan meningkatkan stabilitas nyala api, distribusi temperatur, dan intensitas pembakaran, yang mengarah pada efisiensi pembakaran yang lebih tinggi. Namun, peningkatan emisi NO seiring dengan naiknya fraksi hidrogen mengindikasikan adanya kompromi antara efisiensi dan dampak lingkungan. Bahan bakar biogas menunjukkan temperatur pembakaran yang lebih rendah dan profil temperatur yang lebih seragam dibandingkan gas alam akibat pengenceran oleh CO₂, sehingga menurunkan emisi NO sambil mempertahankan kebutuhan input panas yang lebih rendah. Temuan ini menunjukkan bahwa penggabungan hidrogen secara optimal dalam biogas dapat menjadi alternatif berkelanjutan pengganti gas alam, berkontribusi pada solusi energi yang lebih bersih serta mengurangi emisi gas rumah kaca. Studi ini memberikan wawasan untuk perancangan dan pengoperasian sistem pembakaran canggih dalam pemanfaatan bahan bakar terbarukan.
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This study investigates the combustion characteristics of biogas and hydrogen-enriched biogas in micro gas turbine combustors, focusing on fuels derived from sewage sludge, landfill, wastewater, and syngas methanation, with comparisons to natural gas. The research examines key parameters, including temperature distribution, streamline patterns, exit temperature uniformity, mixture fraction, and pollutant emissions (NO and CO). Five fuel configurations—100% biogas, 25% biogas-75% hydrogen, 50% biogas-50% hydrogen, 75% biogas-25% hydrogen, and 100% hydrogen—are analyzed under varying hydrogen mole fractions using ANSYS Fluent simulations.
Results reveal that hydrogen enrichment significantly enhances flame stability, temperature distribution, and combustion intensity, leading to higher combustion efficiency. However, the increase in NO emissions with hydrogen fractions highlights the trade-offs between efficiency and environmental impact. Biogas fuels exhibit lower combustion temperatures and more uniform profiles than natural gas due to CO₂ dilution, reducing NO emissions while maintaining lower heat input requirements. The findings suggest that optimized hydrogen blending in biogas can offer a sustainable alternative to natural gas, contributing to cleaner energy solutions while mitigating greenhouse gas emissions. This work provides insights into the design and operation of advanced combustion systems for renewable fuel utilization.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Turbin gas mikro, biogas, karakteristik pembakaran, Micro gas turbine, biogas, combustion characteristics
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ254.7 Combustion chambers T Technology > TJ Mechanical engineering and machinery > TJ778 Gas turbines T Technology > TP Chemical technology > TP359 Biogas
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Ihsan
Date Deposited:	05 Aug 2025 01:42
Last Modified:	05 Aug 2025 01:42
URI:	http://repository.its.ac.id/id/eprint/127313

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