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All Journal Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif JoDENS: Journal of Digital Ecosystem for Natural Sustainability
Wibisono, Muh. Arif
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Automotive Engineering Computer Science & IT Decision Sciences, Operations Research & Management Energy Materials Science & Nanotechnology Mechanical Engineering Transportation

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PERENCANAAN MODEL BISNIS PADA UPAYA KONVERSI BUS LISTRIK TRANS JOGJA Hartanti, Sri; Wibisono, Muh. Arif
Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif Vol. 3 No. 1 (2024): Jurnal Inovasi Teknologi Manufaktur, Energi, dan Otomotif
Publisher : Politeknik Negeri Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57203/jinggo.v3i1.2024.34-50

Abstract

Indonesia currently has an oversupply of electricity. Until 2023 PLN has a remaining oversupply of around 6.1 thousand GWh. The cause is the 35-gigawatt coal-fired power plant megaproject. Economic growth has never reached 7%, but an average of 5%. While electricity growth, which was originally planned to reach 8%, the realization could not reach 5%. As a result, there was an oversupply of up to 1gigawatt, and PLN lost 3 trillion. Efforts are needed to increase electrification to reduce losses from oversupply. This is in accordance with the Yogyakarta Special Region Government's plan to convert Trans Jogja Buses into electric buses. This study aims to plan a business model for the conversion of Trans Jogja Buses to Electric Buses, and analyze the feasibility of its investment. From the four business models given, business model 2 was obtained as the best scenario. In this model, Dinas Perhubungan Yogyakarta as the owner of the electric bus fleet and charging station, then contracts the operator PT Anindya Mitra Internasional to be responsible for the operation, while the maintenance of the fleet is carried out by the Original Equipment Manufacturer (OEM). Business model 2 has the highest NPV, which is Rp212,801,776,072 indicating that this project generates greater value compared to the other business models. Other that, business model 2 has an Internal Rate of Return (IRR) of 17%, which is higher than business model 1 and business model 3, indicating a higher potential return on investment. The Payback Period (PBP) is similar to business model 1, which is 4 years and 2 months, but overall the business model 2 project is more profitable. So business model 2 is the best option to implement.
Perbaikan Kualitas Pembatikan pada CNC Batik Tulis Rotary Bed Menggunakan Metode Taguchi Hamidi, Kurniawan; Wibisono, Muh. Arif
Journal of Digital Ecosystem for Natural Sustainability Vol 3 No 1 (2023): Juli 2023
Publisher : Fakultas Komputer - Universitas Universal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63643/jodens.v3i1.163

Abstract

The nglowongi process is one part of the batik process, which is making patterns on mori. As technology develops, this process is replaced by machines that apply CNC technology, namely the CNC rotary bed. In its implementation, obstacles were found such as failure to form motifs that have perfect angles on the fabric. There are many possible factors that cause the failure, but the authors focus on the limiting factors on the speed and acceleration of the stepper motor movement and the design angle of the motif. The purpose of this research is to optimize the input setup (speed and acceleration) on GRBL during the process of making angular motifs on batik cloth. The method used is the Taguchi method and two way-ANOVA. The results of this study indicate that the optimal combination of motif design angle, speed and acceleration is 91°-180°, 833.33 mm/s or 500 mm/min respectively and the input acceleration is 4000 mm/s2
Co-Authors Hamidi, Kurniawan Hartanti, Sri