HASTANTO, Ari and Fajar TK, Berkah and Windarta, Jaka (2024) ASESMEN MANAJEMEN ENERGI LISTRIK DENGAN STUDI KASUS PADA COAL HANDLING SYSTEM PLTU. Masters thesis, UNIVERSITAS DIPONEGORO.

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Abstract

Pembangkit Listrik Tenaga Uap (PLTU) Jawa IV merupakan salah satu PLTU berdaya terbesar di Indonesia yang memiliki transportasi batubara dari Jetty menuju Bunker sepanjang 5,2 kilometer yang dikelola Coal Handling System (CHS). Dalam rangka memenuhi target GREEN PROPER tahun 2026, perusahaan perlu melakukan tindakan efisiensi energi sebagai salah satu poin pendukungnya. United Nations Industrial Development Organization (UNIDO) memberikan pedoman pengelolaan energi berdasarkan ISO 50001 di sektor industri. Pedoman ini menghasilkan keluaran pada pengguna energi terbesar CHS, yaitu sistem konveyor. Pengoperasian sistem konveyor CHS yang panjang dengan struktur naik turun, area luas, kondisi angin dan cuaca berubah-ubah, menyebabkan frekuensi intermiten meningkat, dan tonase berubah-ubah, yang berpengaruh pada fluktuasi konsumsi energi. Pengaplikasian analisis regresi multivarian dapat menyelidiki variabel-variabel independen yang berpengaruh langsung terhadap konsumsi energi sistem konveyor. Pengambilan data dilakukan selama bulan April hingga Juni, dengan bulan Mei adalah periode dilakukannya kegiatan penggantian roller yang diteliti sebagai salah satu variabel yang mempengaruhi konsumsi energi sistem konveyor. Sebagai peningkatan efektifitas konsumsi energi, penambahan tiga teknisi terampil dapat meningkatkan kualitas preventive maintenance (PM), dengan mengurangi breakdown fasilitas sebesar 80%, serta berpotensi menghemat energi hingga 33.184,26 kWH/bulan. Durasi tonase optimal per hari untuk meminimumkan konsumsi energi, namun tetap memenuhi kebutuhan batubara yang ditransportasikan sebesar 22.000 ton per hari adalah berturut-turut 0,30; 2,56; dan 13,30 jam pada tonase <1000, 1000-1200, dan 1200-1400 tph, berpotensi menghemat energi hingga 9.462,44 kWH/bulan. Sedangkan skenario penggantian roller berumur di atas dua tahun sebesar 2% dari total keseluruhan berpotensi menghemat energi hingga 16.997,44 kWH/bulan. Penerapan konsep Lean Six Sigma pada operasional CHS memiliki potensi penghematan energi dari pengurangan jeda sequence start sebesar 6.826 kWH atau setara Rp6.804.061. Sedangkan potensi penghematan energi dari peningkatan efektivitas waktu operasional sesuai dengan durasi ideal adalah 13.445 kWH atau setara Rp13.401.656 setiap bulan.
Kata kunci: CHS, UNIDO, Sistem Konveyor, Analisis Regresi Multivarian, Intermiten, Durasi Tonase, Roller, Lean Six Sigma

The Coal-Fired Power Plant (CFPP) Java IV is one of the largest capacity power plants in Indonesia, along 5.2-kilometer coal transportation from Jetty to Bunker, managed by the Coal Handling System (CHS). To meet the GREEN PROPER target for 2026, the company needs to implement energy efficiency measures as one of the supporting points. The United Nations Industrial Development Organization (UNIDO) provides energy management guidelines based on ISO 50001 for the industrial sector. These guidelines identify the main energy user within CHS, that is the conveyor system. The operation of long conveyor system with varying elevations, large area, unstable wind and weather conditions leads to increased intermittent frequency and fluctuating tonnage, affecting energy consumption fluctuations. The application of multivariate regression analysis might investigate the independent variables that directly impact the energy consumption of the conveyor system. Data collection was carried out from April to June, with May being the period during roller replacement activities were conducted, researched as one of the variables affecting the conveyor system's energy consumption. To enhance energy consumption effectiveness, the addition of three skilled technicians can improve the quality of preventive maintenance (PM), reducing facility breakdowns by 80% and potentially saving up to 33,184.26 kWh per month. The optimal tonnage duration per day to minimize energy consumption while meeting the coal transportation needs of 22,000 tons per day is consecutively 0.30, 2.56, and 13.30 hours at tonnages of <1000, 1000-1200, and 1200-1400 tph, potentially saving up to 9,462.44 kWh per month. Additionally, the scenario of replacing rollers older than two years, comprising 2% of the total, could save up to 16,997.44 kWh per month. Implementing Lean Six Sigma concepts in CHS operations has the potential to save energy by reducing sequence start delays by 6,826 kWh or equivalent to Rp6,804,061. Meanwhile, potential energy savings from increasing operational time effectiveness according to ideal duration is 13,445 kWh or equivalent to Rp13,401,656 per month.
Keywords: CHS, UNIDO, Conveyor System, Multivariate Regression Analysis, Intermittent, Tonnage Duration, Roller, Lean Six Sigma

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