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All Journal Jurnal Teknik EPSILON: Journal of Electrical Engineering and Information Technology
Een Taryana
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Kebocaran Gas SF6 Terhadap Kecepatan Busur Api dan Tegangan Tembus pada PMT di GISTET Saguling Naftalin Winanti; Een Taryana; Gina Nur Sa’adah
EPSILON: Journal of Electrical Engineering and Information Technology Vol 20 No 1 (2022): EPSILON: Journal of Electrical Engineering and Information Technology
Publisher : Department of Electrical Engineering, UNJANI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/epsilon.v20i1.86

Abstract

Gas Insulated Switchgear Extra High Voltage (GISTET) is a power system component that has a function as a distribution center (transmission) that connects the extra high voltage transmission system through distribution channels or substations. Based on the installation of GISTET equipment, relying on hexafluoride gas (SF_6) as an insulating medium on the equpment. Equipment at GISTET is not always in good condition, GISTET also often experiences problems. One of the distrubances that GISTET often experiences is the leakage of SF6 gas at the PMT (circuit breaker). This requires a treatment called a GISTET overhaul. So in this paper the author will analyze the SSF_6 gas leak as insulation on the PMT (circuir breaker) at GISTET Saguling. According to the results of the calculations in this final project, the gas pressure of SF_6 and the breakdown voltage of PMT are interrelated. At the pressure when the gas leak occurs is at a value below 5kgf/cm2it is able to with stand the voltage. Penetrating with a high value so it is very effective to reduce arc fire. In addition, the SF_6 gas pressure is also related to the arc speed because the lower the pressure value at the time of gas leakage, the arc speed decreases, so the arc will be slow to muffle.
Techno-Economic Assessment of Dimethyl Ether (DME)Production through Methanol Dehydration Process Yessa Julyana; Hendriyana; Een Taryana; Handoko Iskandar; Xbal Meiprastyo
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 24 No 2 (2025): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol24no2.797

Abstract

Dimethyl Ether (DME) is a clean, colorless gas that serves as a potential alternative to liquefied petroleum gas (LPG). This study presents a comprehensive techno-economic assessment of DME production via methanol dehydration with a plant capacity of 20,000 tons per year. The process utilizes an alumina–silicate catalyst in a multitube fixed-bed reactor operating at 300–350°C and 30 bar. Simulation results show a methanol conversion of 85% per pass, achieving a final DME purity exceeding 99.5%. The total capital investment (CAPEX) is estimated at USD 12.8 million, with annual operating costs (OPEX) of approximately USD 13 million. Economic indicators reveal a Net Present Value (NPV) of USD 5.2 million, an Internal Rate of Return (IRR) of 14.5%, a Return on Investment (ROI) between 15–17%, and a payback period of six years. The break-even point (BEP) is reached at 60–65% of design capacity. The findings indicate that the DME production process is technically feasible and economically attractive for industrial implementation, supporting Indonesia’s clean energy transition and reduction of LPG imports.
Co-Authors Gina Nur Sa’adah Handoko Iskandar Hendriyana Naftalin Winanti Xbal Meiprastyo Yessa Julyana