Studi Numerik Pengaruh Komposisi CO-Firing Sekam Padi Terhadap Proses Pembakaran Pada Boiler PLTU 400MW

Ananto, Rafif Razaan (2023) Studi Numerik Pengaruh Komposisi CO-Firing Sekam Padi Terhadap Proses Pembakaran Pada Boiler PLTU 400MW. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Upaya PT Perusahaan Listrik Negara (PLN) dalam menurunkan gas Emisi Rumah Kaca (GRK) di tahun 2030 menjadi tantangan untuk PT PLN dalam menurunkan emisi pembakaran pembangkit listrik di Indonesia. Menangapi hal tersebut, dibutuhkan penurunan emisi pada Pembangkit Listrik Tenaga Uap (PLTU) salah satunya dengan melakukan co-firing. Salah satu PLTU terbesar di Indonesia menjadi matriks pertama untuk memprioritaskan penggunaan co-firing. Potensi biomassa sekam padi di wilayah Jawa Timur menjadi potensi untuk digunakan co-firing. Namun perlu dilakukan peninjauan terkait karakteristik pembakaran yang terjadi di dalam boiler seperti temperature pembakaran, kecepatan aliran, emisi gas buang, kecenderungan slagging pada tube yang terdapat di dalam boiler. Pada penelitian ini, diawali dengan pemodelan boiler 3D menggunakan software Solidwork yang kemudian dianalisa Computational Fluid Dynamic (CFD) menggunakan software ANSYS.. Sedangkan untuk persentase co-firing yang digunakan pada penelitian ini memiliki 4 variasi, yaitu 100% batubara, 95% batubara dan 5% biomassa, 90% batubara dan 10% biomassa, 85% batubara dan 15% biomassa. Hasil simulasi menunjukkan bahwa penggunaan co-firing menghasilkan kenaikan temperatur pada daerah furnace exit dan outlet boiler. Pada pencampuran 5%, 10%, dan 15% biomassa dengan batubara 100%, temperatur pada daerah furnace exit secara berturut-turut sebesar 1087°C, 1096°C, 1100°C, 1104°C. Sementara itu, temperatur pada outlet boiler secara berturut-turut adalah 346°C, 355°C, 359°C, dan 363°C Kecepatan flue gas pada daerah outlet boiler juga meningkat dengan peningkatan persentase biomassa, yaitu 6.41 m/s, 6.32 m/s, 6.2 ms, 5.8 m/s. Analisis emisi CO2 dan SO2 menunjukkan bahwa persentase co-firing 15% memiliki emisi terendah dibandingkan dengan kondisi lainnya. Selain itu, analisis kecenderungan pembentukan slagging menunjukkan bahwa penggunaan 100% batubara tidak menimbulkan slagging.
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The efforts of PT Perusahaan Listrik Negara (PLN) to reduce Greenhouse Gas (GHG) Emissions by 2030 pose a challenge for the company in reducing power plant emissions in Indonesia. In response to this issue, emission reduction in Steam Power Plants (PLTU) is needed, one of which is achieved through co-firing. One of Indonesia's largest PLTUs has become the first matrix to prioritize co-firing utilization. The potential of rice husk biomass in the East Java region offers an opportunity for co-firing. However, a review is required concerning the combustion characteristics that occur in the boiler, such as combustion temperature, flow velocity, exhaust gas emissions, and slagging tendencies in the tubes within the boiler. This study begins with a 3D boiler modeling using Solidwork software, followed by Computational Fluid Dynamic (CFD) analysis using ANSYS software. The co-firing percentages used in this research consist of four variations: 100% coal, 95% coal and 5% biomass, 90% coal and 10% biomass, and 85% coal and 15% biomass. The simulation results show that co-firing leads to an increase in temperature in the furnace exit and boiler outlet areas. For the mixtures of 5%, 10%, and 15% biomass with 100% coal, the respective temperatures at the furnace exit are 1087°C, 1096°C, 1100°C, and 1104°C. Meanwhile, the temperatures at the boiler outlet are 346°C, 355°C, 359°C, and 363°C. Flue gas velocity at the boiler outlet also increases with the rising percentage of biomass: 6.41 m/s, 6.32 m/s, 6.2 m/s, and 5.8 m/s. Analysis of CO2 and SO2 emissions shows that the 15% co-firing percentage has the lowest emissions compared to other conditions. Additionally, the analysis of slagging tendencies indicates that the use of 100% coal does not cause slagging.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Co-Firing, Computational Fluid Dynamic, Pembangkit Listrik Tenaga Uap, Steam Power Plant
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:	Rafif Razaan Ananto
Date Deposited:	23 Aug 2023 06:58
Last Modified:	23 Aug 2023 06:58
URI:	http://repository.its.ac.id/id/eprint/101685

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