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All Journal Teknika Prosiding Seminar Nasional Sains dan Teknologi Terapan Jurnal Riset Teknologi Pencegahan Pencemaran Industri
Harefa, Jonius Christian
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science

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Penyusunan Standar Operasional Prosedur Pengoperasian Gardu Induk di PLTP Sarulla Operations Ltd. Harefa, Jonius Christian
Prosiding Seminar Nasional Sains dan Teknologi Terapan 2023: Transformasi Riset, Inovasi dan Kreativitas Menuju Smart Technology dan Smart Energy
Publisher : Institut Teknologi Adhi Tama Surabaya

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Abstract

Sarulla PLTP (Geothermal Power Plant) is a clean and environmentally friendly renewable energy power plant. Sarulla PLTP has a substation as part of the distribution of electricity from the power plant to the electricity network transmission line PT. PLN Persero. Substation operations must be carried out with safety first. Engineers have a code of ethics in Sapta Dharma which prioritizes safety at work. Safety at work can be achieved if there are good and correct SOP’s (Standard Operating Procedures). In engineering practices that have been carried out, it is known that the Sarulla PLTP does not yet have a standard SOP for operating substations at power plants. During engineering practice, SOP’s for the operation of the 150 kV Sarulla – NIL substation have been prepared with reference to supporting data on PT. PLN Persero substation operating standards. The SOP is prepared in accordance with the existing substation configuration at the Sarulla – NIL PLTP.
Tinjauan Singkat Sistem PLTP Siklus Gabungan Sarulla Menggunakan Ormat Energy Converter Harefa, Jonius Christian; Sinaga, Nazaruddin
TEKNIKA Vol. 15 No. 2 (2021): Teknika Juli - Desember 2021
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.7328820

Abstract

Geothermal energy is not fully utilized in Indonesia. Until 2020, the realization of geothermal development into electricity is 2,130.7 MW. One of the geothermal power plants (PLTP) in Indonesia that has been operating is the Sarulla Geothermal Power Plant. The total capacity produced by Sarulla is 330 MW. Sarulla is a Geothermal Combined Cycle that uses a binary power plant to maximize existing geothermal energy. The output of Steam Turbine Generator (STG) is utilized through the OEC Bottoming to produce 7 MW of electricity while Hot Water (Brine) is utilized through the OEC Brine to generate 15 MW of electricity. The residual steam and brine output which are generally injected directly into the injection well, with the binary technology from Ormat Energy Converter (OEC) are then utilized to maximize geothermal energy by generating electricity with a smaller capacity.
Analysis of Potential Utilization of Sarulla Geothermal Combined Cycle Residual Fluids for Direct Use in The Coffee Industry Harefa, Jonius Christian; Hadiyanto; Harmoko, Udi
Jurnal Riset Teknologi Pencegahan Pencemaran Industri Vol. 13 No. 2 (2022): November
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Pencegahan Pencemaran Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21771/jrtppi.2022.v13.no2.p37-50

Abstract

The Geothermal Power Plant is one of the new renewable energy power plants. In Indonesia, the realization has reached 2%. Sarulla Operations Limited is the first geothermal power plant in Indonesia, located in North Tapanuli Regency, that utilizes combined cycle technology. Coffee is the leading commodity in the North Tapanuli district, with a plant area of 17,586 hectares. Coffee is dried in the traditional way (open field drying) so that it is still constrained by rain and cloudiness and can only be done during the day. The reinjection well fluid has a temperature of 103°C with a flow rate of 4978 t/h and a pressure of 6–14 Bar. This study analyses the residual fluid energy for coffee drying purposes. Energy and exergy calculations are done manually and using DWSIM software with a total of 24 data points 24 hours a day to represent the availability of dryers both day and night. The results showed that the most energy needed to raise the drying air temperature at night from 15°C to 60°C was 125.62 kW, while the lowest energy needed to raise the drying air temperature during the day from 30°C to 40°C was 27.92 kW. The results of research calculations show the energy potential for residual fluid from geothermal plants to be used for drying coffee for 24 hours, both day and night.
Co-Authors Hadiyanto Nazaruddin Sinaga Udi Harmoko