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All Journal Jurnal Surya Teknika Industrial Research Workshop and National Seminar
Alvera Apridalianti Melkias
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Analisis Kinerja Limestone Crusher 231.CR Alvera Apridalianti Melkias; Moch Raffy Soekarno
Prosiding Industrial Research Workshop and National Seminar Vol 13 No 01 (2022): Vol 13 (2022): Prosiding 13th Industrial Research Workshop and National Seminar
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v13i01.4249

Abstract

Pada proses pembuatan semen terdapat suatu proses peremukan material batu kapur dari area penambangan, tahapan peremukan ini sangat penting pada proses penyediaan bahan baku dalam proses selanjutny. Alat yang di gunakan dinamakan adalah Limestone Crusher. Rumusan masalah pada penelitian ini yaitu menganalisis kinerja pada mesin Limestone Crusher dengan perhitungan Reduction ratio, efisiensi kerja, nilai produktivitas, konsumsi energi spesifik. Tujuan penelitian adalah untuk menghitung nilai kinerja alat Limestone Crusher. Batasan masalah pada penelitian iniyaitu alat yang diteliti adalah Limestone Crusher pada PT Semen Indonesia di Pabrik Tuban 1 dan data yang diperoleh adalah data actual. Berdasarkan hasil pengolahan data dan analisis diperoleh bahwa efisiensi kerja dari Limestone Crusher Tuban 1 adalah sebesar 56,56 % dengan laju produktivitas atau kapasitas produksi sebesar 1532,40 ton/jam. Faktor yang mempegaruhi efektivitas produksi adalah nilai kesediaan mekanis adalah sebesar 91,07 %, nilai kesediaan fisik adalah sebesar 93 %, dan nilai kesediaan penggunaan adalah sebesar 70 %. Konsumsi energi spesifik Limestone Crusher Tuban 1 PT Semen Indonesia sebesar 1,18 kWh/ton produk.
Analisis Pengaruh Perubahan Tekanan Vakum Kondensor Terhadap Performa Turbin Uap Sri Wuryanti; Salma Halimatu Sya’diah; Alvera Apridalianti Melkias
Prosiding Industrial Research Workshop and National Seminar Vol. 15 No. 1 (2024): Prosiding 15th Industrial Research Workshop and National Seminar (IRWNS)
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v15i1.6281

Abstract

Vacuum pump condenser merupakan komponen yang menjaga tingkat kevakuman dalam kondensor. Turbin uap adalah satu dari beberapa komponen utama yang ada di PLTU yang harus dijaga agar efisiensinya tidak turun. Diantara yang harus diperhatikan dalam menjaga performanya adalah tekanan vakum kondensor. Terdapat kenaikan tekanan vakum kondensor di PLTU Banten 3 Lontar setelah dilakukan overhaul, dimana kenaikan tekanan vakum kondensor tersebut berpengaruh terhadap performa turbin uap. Tekanan vakum kondensor yang rendah mengakibatkan steam exhaust turbine tidak tertarik ke kondensor sehingga dapat merusak sudu-sudu turbine. Penelitian ini melihat pengaruh perubahan tekanan vakum terhadap turbin uap sebelum dan sesudah overhaul. Hasil perhitungan menunjukkan nilai efisiensi turbin uap tertinggi sesudah overhaul adalah 40,693% dengan heat rate 2114,401 kkal/kWh pada tekanan vakum 0,0736 bar (tekanan absolut) dan sebelum overhaul pada tekanan 0,0882 bar (tekanan absolut) yaitu 39,794% dengan heat rate 2161,154 kkal/kWh. Adanya overhaul memengaruhi tekanan vakum yang lebih tinggi dari sebelum overhaul sehingga efisiensi turbin meningkat.
Evaluasi Efektivitas Perpindahan Panas Generator Air Cooler pada PT. X Moch. Gilang Muharam; Alvera Apridalianti Melkias; Indriyani, Indriyani
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7305

Abstract

The generator air cooler at PT. X functions as a heat exchanger in the process of cooling air in the generator. As an air cooler for the generator, the generator air cooler must have good effectiveness. Good effectiveness is considered from the heat transfer between the cooling water in the air cooler generator as the cooling medium and the air being circulated, so the heat absorption is expected to be maximized. Based on the calculations conducted, the fin efficiency of the air cooler generator is 41.6%, the overall heat transfer coefficient (U) is 59.49 W/m²°C, the heat transfer rate on the fins is 312.2703 kW, the heat transfer rate on the tubes is 84.39696 kW, the number of transfer units (NTU) is 0.853, and the overall effectiveness of the air cooler generator system is 53.06%, showing a decrease of 33.94% from the maximum effectiveness of 87%.
Audit Energi Sistem Pencahayaan pada Gedung A Muhammad Noor Hadi; Alvera Apridalianti Melkias; Aceng Daud
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7332

Abstract

The lighting system is an important aspect in supporting life in carrying out daily work to create a comfortable work environment. This research aims to conduct an energy audit of the lighting system in Building A to identify the quality of the lighting system on the 2nd Floor and 3rd Floor of Building A. The method used is in accordance with standards for measuring lighting intensity and lighting power. The results of the lighting system energy audit revealed that 24 areas on the 2nd floor and 27 areas on the 3rd floor did not meet lighting intensity standards, while 2 areas on the 2nd floor and 2 areas on the 3rd floor did not meet lighting power intensity standards according to applicable standards. Based on the research conducted, there are two alternative recommendations for improving the lighting system and can provide energy saving opportunities in three areas on the 2nd floor with a total monthly savings of 84.87 kWh per month and four areas on the 3rd floor with a total savings of 39.75 kWh per month
Analisis Penggunaan Sistem Parabolic Trough Collector pada Bypass High Pressure Heater PLTU 600 MW Farhansyah, Farhansyah; Alvera Apridalianti Melkias; Ignatius Riyadi Mardiyanto
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7429

Abstract

The regenerative process involves heating the feedwater out of the condenser using residual steam or extraction from the steam turbine and then pumping it back into the boiler. To achieve the greenhouse gas emission reduction target set by the Government of the Republic of Indonesia, power plant managers need to consider strategies to reduce these emissions. One strategy that can be taken is to harness solar energy through parabolic trough type solar collectors. In PLTUXYZ, the design of a parabolic trough type solar collector is carried out on bypasses HPH 6 through HPH 8 using system advisory model and gatecycle software. The design results show that the existence of this solar collector has the potential to reduce coal use by 9.33 tons/hour under optimal solar conditions, with coal savings reaching 4,143.3 tons of coal for USD 380,231.30/year.
Co-Authors Aceng Daud Farhansyah, Farhansyah Ignatius Riyadi Mardiyanto Indriyani Indriyani Moch Raffy Soekarno Moch. Gilang Muharam Muhammad Noor Hadi Salma Halimatu Sya’diah Sri Wuryanti