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All Journal Infotekmesin Jurnal Polimesin Jurnal Teknologi dan Rekayasa Alat Berat (JTRAB)
Prayitno, Yosephus Ardean Kurnianto
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Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Sistem Integrasi (ISO 50001) Dengan Kombinasi Chi-Square Test Untuk Analisis Manajemen Penggunaan Energi Operasional Alat Berat Pada Perusahaan Terminal Pelabuhan Ramadhana, Ridho Rizky; Prayitno, Yosephus Ardean Kurnianto; Irfan Bahiuddin; Setyawan Bekti Wibowo; Sugiyanto
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 2 (2025): JTRAB Volume 2, No 2, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i2.14637

Abstract

Port terminal companies play an important role in the growth of international trade, with more than 85% of global cargo traffic transported via sea routes and ports. As international trade continues to grow in line with the increasing use of energy, it is necessary to implement energy management strategies to maximize energy utilization. An analysis of the energy management maturity level of a port terminal company based on ISO 50001, combined with a Chi-square test, was carried out to evaluate the actual use of fuel oil (BBM) in equipment. The results showed a maturity level value of ≥ 4 and a significant value in the Chi-square test, indicating an ideal condition for energy management in industrial companies. On the other hand, there is a fluctuating trend in the actual fuel oil usage ratio. This indicates that the company needs to regularly evaluate the alignment between managerial policy-making and actual field data, enabling the company to promptly address any deficiencies occurring on site.
An in-situ experimental and numerical evaluation on thermoelectric generators performance utilizing diesel engine exhaust heat Sugiyanto, Sugiyanto; Aisyah, Nyayu; Prayitno, Yosephus Ardean Kurnianto; Bahiuddin, Irfan
Jurnal Polimesin Vol 23, No 5 (2025): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i5.7615

Abstract

Waste Heat Recovery (WHR) from heavy-duty diesel generators using Thermoelectric Generators (TEGs) offers a potential way to improve total system efficiency and reduce fuel consumption. This study combines experiments and numerical simulation to evaluate the performance of Hi-Z HZ 14 TEGs modules applied to a 6-cylinder, 60 kVA diesel generator. Experimentally, TEG modules were mounted equidistantly along the exhaust manifold, 40 cm from the engine, and tested at idle (750 rpm) with and without active air-side cooling. Hot- and cold-side temperatures, open-circuit Voltage (Voc), load power, and conversion efficiency were recorded. A matching TEG configuration was simulated under the same boundary conditions. As a result, active cooling increased the temperature differential and consistently improved power output and efficiency relative to natural convection. An efficiency of 2.1% was observed, in reasonable agreement with the simulation and consistent with typical TEGs performance under comparable operating conditions. Although this value confirms the feasibility of TEG integration in heavy-duty diesel exhaust systems, further improvements are possible through material selection, heat-sink optimization, and advanced cooling strategies.
Analisis Desain Central Body Undercarriage Alat Peraga Mini Excavator Zhugimada dengan Metode Elemen Hingga Prihadianto, Braam Delfian; Prayitno, Yosephus Ardean Kurnianto; Hasan, Dani Anggoro; Hidayat, Anisa Nurul; Adhim, Inn Aka La’ala Khuluqin
Infotekmesin Vol 17 No 1 (2026): Infotekmesin: Januari 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v17i1.3036

Abstract

The availability of practical facilities in mechanical engineering vocational education requires representative yet economical learning media. The development of a mini excavator demonstration tool by the Mechanical Engineering Department of Sekolah Vokasi Universitas Gadjah Mada (SV-UGM) is an effective alternative to support practical and research activities because it reflects the function and mechanism of an excavator with efficient costs and dimensions. This study analyzes the central body undercarriage design of the Zhuigimada mini excavator demonstration tool using the finite element method with the aid of Computer Aided Engineering tools. The material used is American Society for Testing and Materials (ASTM) A572 with a load of 19,620 N. The simulation results show a maximum von Mises stress of 21.69 MPa, a total displacement of 0.0133 mm, and a safety factor of 15.9. These values ​​indicate that the undercarriage design has good strength and stiffness against static loads produces an undercarriage design that is safe, efficient, and representative of the excavator work system.
Co-Authors Adhim, Inn Aka La’ala Khuluqin Aisyah, Nyayu Bahiuddin, Irfan Hasan, Dani Anggoro Hidayat, Anisa Nurul Prihadianto, Braam Delfian Ramadhana, Ridho Rizky Setyawan Bekti Wibowo SUGIYANTO Sugiyanto -