MARGAWADI, Kenanga Apriliana and Widayat, Widayat and Suedy, Sri Widodo Agung (2024) SIMULASI CO-FIRING DENGAN CAMPURAN LOW RANGE COAL DAN MEDIUM RANGE COAL TERHADAP KINERJA PEMBANGKIT LISTRIK TENAGA UAP KAPASITAS 615 MW. Masters thesis, UNIVERSITAS DIPONEGORO.

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Abstract

PLTU batubara di Indonesia menguasai hampir 70% sumber pemenuhan kebutuhan energi listrik nasional, yang berkontribusi signifikan pada pemanasan global. Program co-firing biomassa pada pembangkit listrik tenaga batubara (Coal Fired Power Plant/CFPP) menjadi salah satu solusi. Penelitian ini bertujuan untuk mengkaji konsentrasi biomassa terhadap parameter operasional, efisiensi pembangkit, performa peralatan auxiliaries, dan analisis tekno ekonomi. Metode penelitian adalah dengan membuat simulasi pembakaran coal blending pada jenis batubara Medium Rank Coal (MRC) dan Low Rank Coal (LRC) serta biomassa wood pellet yang persentasenya ditingkatkan sampai 50%. Hasil penelitian menunjukkan bahwa meningkatnya persentase biomassa berakibat penurunan efisiensi pembangkit. Metode pembakaran pulverizer hanya mampu mengakomodasi 10% co-firing pada operasional 100%, dan pada operasional 75% mampu mengakomodasi sampai 30% co-firing. Analisis tekno ekonomi terkait carbon trading, pada pembakaran batubara sepenuhnya masih memperoleh keuntungan dari penjualan karbon, tetapi pada pembakaran co-firing secara business cost sisi bahan bakar masih belum menguntungkan.
Kata kunci: co-firing, wood pellet, coal blending, MRC & LRC, carbon trading

Coal Power Plants in Indonesia, account for nearly 70% of the nation's electricity supply, contributing significantly to global warming. The introduction of co-firing program for Coal Fired Power Plants (CFPP) has emerged as a viable solution. This study aims to assess the impact of varying biomass concentrations on operational parameters, overall generation efficiency, performance of auxiliary equipment, and conduct a techno-economic analysis. The methodology involved simulating coal blending combustion with Medium Rank Coal (MRC), Low Rank Coal (LRC), and wood pellet biomass at concentrations of up to 50%. The findings revealed that higher biomass percentages correlated with a reduction in plant efficiency. The pulverizer combustion techniques demonstrated the ability to incorporate up to 10% co-firing during full operation, escalating to 30% at 75% operation capacity. The economic techno analysis, particularly in relation to Carbon Trading, indicated that while coal combustion reaped substantial benefits from carbon sales, co-firing operations on the Fuel side still lacked profitability.
Key words: co-firing, wood pellet, coal blending, MRC & LRC, carbon trading

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