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All Journal Rotasi Jurnal Offshore: Oil, Production Facilities, and Renewable Energy International Journal of Renewable Energy Development
Rahmanta, Mujammil Asdhiyoga
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Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

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Analisis Perkembangan Teknologi Modul Photovoltaic (PV) Untuk Meningkatan Penetrasi Pusat Listrik Tenaga Surya (PLTS) Di Indonesia Rahmanta, Mujammil Asdhiyoga; Syamsuddin, Agussalim; Tanbar, Fefria; Damanik, Natalina
Jurnal Offshore: Oil, Production Facilities and Renewable Energy Vol. 7 No. 1 (2023): Jurnal Offshore: Oil, Production Facilities and Renewable Energy
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jo.v7i1.1509

Abstract

Pembangkit listrik energi terbarukan (ET) dapat mengurangi penggunaan pembangkit listrik berbahan bakar fossil yang merusak lingkungan terkait dengan emisi CO2. Photovoltaic (PV) adalah suatu alat yang dapat mengubah energi surya (foton) menjadi listrik arus searah yang merupakan salah satu komponen dalam Pusat Listrik Tenaga Surya (PLTS). Karakteristik tekno ekonomi PV sangat mempengaruhi Levelized Cost of Energy (LCOE) dari PLTS. Penelitian ini bertujuan untuk menganalisis perkembangan teknologi PV dan pemanfaatannya di Indonesia. Metode tinjauan Pustaka yang komprehensif dilakukan dalam penelitian ini. Dari hasil diskusi dan pembahasan disimpulkan bahwa teknologi PV jenis monokristalin memiliki tren pemakaian yang relatif tinggi karena effisiensi/kinerja relatif tinggi, kemudahan fabrikasi, sifat ramah lingkungan, & kehandalan terhadap kondisi lingkungan yang ekstrim (umur operasional lama). Potensi energi surya terbesar di Indonesia terdapat di sekitar wilayah Nusa Tenggara Timur dengan nilai direct normal irradiation sebesar 5 kWh/m2. PLTS berpotensi untuk dibangun di luar Jawa Bali Sumatera mengacu pada tingginya LCOE setempat sehingga nilai feed in tariff yang digunakan dalam kontrak jual beli listrik dapat bersaing dengan nilai LCOE PLTS.  
A techno-economic and environmental analysis of co-firing implementation using coal and wood bark blend at circulating fluidized bed boiler Cahyo, Nur; Sulistyowati, Desy; Rahmanta, Mujammil Asdhiyoga; Felani, Muhamad Iqbal; Soleh, Mochamad; Paryanto, Paryanto; Prismantoko, Adi; Hariana, Hariana
International Journal of Renewable Energy Development Vol 13, No 4 (2024): July 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.60234

Abstract

The study aimed to explore the effects of biomass co-firing of coal using acacia wood bark at circulating fluidized bed (CFB) boiler coal-fired power plant with 110 MWe capacity. The analysis focused on main equipment parameters, including the potential for slagging, fouling, corrosion, agglomeration, fuel cost, and specific environmental factors. Initially, coal and acacia wood bark fuel were blended at a 3% mass ratio, with calorific values of 8.59 MJ/kg and 16.59 MJ/kg, respectively. The corrosion due to chlorine and slagging potential when using wood bark was grouped into the minor and medium categories. The results showed that co-firing at approximately 3% mass ratio contributed to changes in the upper furnace temperature due to the variation in heating value, high total humidity, and a less homogeneous particle size distribution. Significant differences were also observed in the temperature of the lower furnace area, showing the presence of a foreign object covering the nozzle, which disturbed the ignition process. A comparison of the seal pot temperature showed imbalances as observed from the temperature indicators installed on both sides of boiler, with specific fuel consumption (SFC) increasing by approximately 0.17%. During the performance test, the price of acacia wood bark was 0.034 USD/kg, resulting in fuel cost of 0.023355 USD/kWh, adding 0.061 cent/kWh to coal firing cost. Despite co-firing, the byproducts of the combustion process, such as SO2 and NOx, still met environmental quality standards in accordance with government regulations. However, a comprehensive medium- and long-term impact evaluation study should be carried out to implement co-firing operations using acacia wood bark at coal-fired power plant. Based on the characteristics, such as low calorific value, with high ash, total moisture, and alkali, acacia wood bark showed an increased potential to cause slagging and fouling.
Characterization of Bed Agglomeration in Circulating Fluidized Bed Boilers: Influence of Coal Quality and Bed Material Interactions Cahyo, Nur; Triasdian, Yayak; Busairi, Achmad; Rahmanta, Mujammil Asdhiyoga; Paryanto, Paryanto; Fajar TK, Berkah
ROTASI Vol 27, No 3 (2025): VOLUME 27, NOMOR 3, OKTOBER 2025
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.27.3.22-29

Abstract

The utilization of coal in generating energy across the world is extremely popular due to its low cost. Otherwise, coal quality plays a significant role in other potential problems. Such an interaction between bed material and coal properties could lead to the formation of bed agglomeration, which melts in the CFB boiler of a power plant. The result shows that the majority of agglomeration samples were granular and dominated by round shapes, as observed visually. The EDX analysis shows that the three biggest elements in the agglomeration sample are oxygen, silica, and calcium. Meanwhile, XRD analysis reveals that the most reactive products were muscovite, albite, and dolomite compounds. They were composed of natrium in the range of 1.95–2.84%, silicon in the range of 20.2–21.16%, aluminium in the range of 13.05–15.46%, calcium in the range of 1.05–3.11%, and others. Therefore, several potential alternatives might be the best way to reduce the risk of agglomeration in a boiler. Including using additives like china clay and soils, especially those containing kaolin, and utilizing alternate bed materials. Another promising option to prevent this problem is to reduce the combustion temperature and replace bed material periodically.
Co-Authors Berkah Fajar TK Busairi, Achmad Damanik, Natalina Desy Sulistyowati, Desy Felani, Muhamad Iqbal Hariana, Hariana Nur Cahyo Paryanto Paryanto Prismantoko, Adi Soleh, Mochamad Syamsuddin, Agussalim Tanbar, Fefria Triasdian, Yayak