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Pribadi Mumpuni Adhi
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Jurnal Mekanik Terapan
Published by Politeknik Negeri Jakarta
ISSN : -     EISSN : 27471381     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Mekanik Terapan (JMT) adalah jurnal ilmiah yang terbit secara berkala dua kali setahun pada bulan Mei dan Oktober. Jurnal ini dapat digunakan sebagai sumber informasi ilmiah untuk peneliti, akademisi atau lembaga penelitian, insinyur industri, dan lembaga pemerintah. JMT memuat informasi bidang riset Mekanik Terapan berupa hasil riset dan Ulasan Ilmiah pada bidang: -Teknik Mesin dan Manufaktur -Energi (Konversi Energi, Renewable Energy, Applied Chemistry in Energy) -Mekatronika dan Robotika -Otomotif (Alat Berat dan Kendaraan Ringan) -Material dan Metalurgi -Teknik Pembangkit Tenaga Listrik
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 134 Documents
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Simulation and Evaluation Hydrogen-rich Syngas Production from Palm Kernell Shell Through Gasification Kasmiarno, Laksmi Dewi; Nurufazzah, Arifatin
Jurnal Mekanik Terapan Vol 6 No 2 (2025): Agustus 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i2.7676

Abstract

The increasing global demand for energy, coupled with the depletion of fossil fuel reserves, has prompted the urgent need for alternative and sustainable energy sources. Biomass, particularly palm oil waste such as palm kernel shell (PKS) presents as an alternative solution due to its abundance, high calorific value, and low moisture content. This study investigates the production of syngas from PKS through gasification using Aspen PlusTM process simulation software. The simulation is divided into pre-treatment, gasification, and separation stages, employing R-Stoic, R-Yield, and R-Gibbs reactor blocks to model drying, decomposition, and thermodynamic equilibrium, respectively. Two gasifying agents, steam and air, were evaluated under varying temperature conditions and equivalence ratio (ER) ranging from 0.19 to 0.27. The results indicate that both temperature and ER significantly influence syngas composition, particularly the production of H2 and CO, while higher ER values tend to reduce carbon efficiency. Steam gasification produced higher hydrogen yields compared to air. Simulation outputs showed strong agreement with experimental data, validating the model’s accuracy. This study demonstrates the potential of PKS gasification for renewable energy generation and highlights the effectiveness of process simulation for system design and optimization prior to industrial implementation.
Rancang Bangun Walker untuk Lansia dengan Fitur Adjustable Height: Analisis Kekuatan Struktur Menggunakan Simulasi Elemen Hingga Batubara, Yongki; Radyantho, Kholiq Deliasgarin; Sujana, I Made Ivan Wiyarta Cakra; Margyanto, Ageng; Alfandy, Alev Putra; Attila, Muhammad Rayes; Suisman, Kelvin Febriano Wiranata
Jurnal Mekanik Terapan Vol 6 No 2 (2025): Agustus 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i2.7685

Abstract

This study aims to design a walker for the elderly equipped with an adjustable height feature to improve user comfort and safety. The frame design was developed using CAD software and its structural strength was analyzed using the Finite Element Method (FEM). Simulations were carried out with static load variations ranging from 40 kg to 90 kg on aluminum alloy 6061-T4 material. The analyzed parameters include von Mises stress, equivalent strain, total deformation, and safety factor. The simulation results show a maximum von Mises stress of 28.99 MPa at a 90 kg load, which remains well below the material’s yield strength of 230 MPa, with a minimum safety factor of 7.849. These findings demonstrate that the walker design is safe to use within the tested load range. Future research is recommended to conduct dynamic structural testing and experimental validation of the physical prototype.
Analisis Konsumsi Energi Listrik Serta Peluang Penghematan Energi Sistem Pencahayaan Dan Sistem Tata Udara Gedung Pusat Perbelanjaan Ekayuliana, Arifia; Adam Hidayat; Fitri Wijayanti
Jurnal Mekanik Terapan Vol 6 No 2 (2025): Agustus 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i2.7709

Abstract

Penelitian ini bertujuan mengevaluasi konsumsi energi listrik dan mengidentifikasi potensi penghematan energi pada sistem pencahayaan dan tata udara di Plaza XYZ, sebuah pusat perbelanjaan enam lantai di Jakarta Barat yang belum memiliki sistem pemantauan energi. Metode yang digunakan berupa pendekatan kuantitatif melalui observasi lapangan dan analisis data teknis. Evaluasi dilakukan terhadap jumlah lampu, kapasitas AC split, dan performa chiller menggunakan parameter COP dan kW/TR. Hasil menunjukkan nilai Intensitas Konsumsi Energi (IKE) tergolong boros. Potensi penghematan mencapai 6.927,19 kWh/bulan untuk pencahayaan dan 1.145,40 kWh/bulan untuk tata udara. Rekomendasi diarahkan pada optimalisasi sistem untuk efisiensi energi gedung.
GRBL Based 3 Axis CNC Milling Design Azam Milah Muhamad; Radhi Maladzi; Luqyana, Dhiya; Damis, Candra; Nurjanah, Darul
Jurnal Mekanik Terapan Vol 6 No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i3.7567

Abstract

This study presents the design and fabrication of a GRBL-based 3-Axis CNC Milling Machine for laboratory and small-scale industry applications. The system is controlled by an Arduino Uno using GRBL firmware, with NEMA 17 stepper motors and a DC 775 spindle. The Quality Function Deployment (QFD) method was applied to align the design with user requirements. The machine features a 600 × 400 mm working area, 200 Watt power consumption, and spindle speed ranging from 3,000 to 12,000 RPM. Testing results demonstrate high precision and energy efficiency. This machine is suitable for digital manufacturing education and prototyping.
Analisis Pengaruh Perubahan Beban Terhadap Nilai Turbin Heat Rate dan Efisiensi Termal Turbin pada PLTU Cilacap Febrianto, Muhammad Rafi; Widiawaty, Candra Damis; Wijayanti, Fitri
Jurnal Mekanik Terapan Vol 6 No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i3.7610

Abstract

Fluctuations in operating load at the Cilacap Steam Power Plant (PLTU) often cause changes in steam turbine performance that affect generation efficiency and fuel consumption. This study aims to assess the effect of load variations on turbine heat rate, measure changes in thermal efficiency, and analyse their impact on fuel consumption and generation costs. A quantitative correlational method was applied using secondary data from the December 2023 periode, including electrical load parameters, steam flow rate, inlet-outlet enthalpy, and generator output. Heat rate and thermal efficiency calculations were performed based on thermodynamic formulas, while fuel consumption and cost analysis were conducted through comparisons of values per kWh. The results show that an increase in operating load consistently reduces the heat rate and improves thermal efficiency, meaning that steam energy is utilised more optimally. Additionally, fuel consumption and generation costs tend to decrease as the load approaches optimal conditions. These findings underscore the importance of maintaining the operating load within an appropriate range to maximise energy efficiency, reduce fuel consumption, and minimise electricity production costs at the Cilacap Coal-Fired Power Plant
Optimasi Desain Jig Untuk Check Hole Pada Komponen Dudukan Shockbreaker Mobil Hibaitulah, Hasbi; Karyadi, Karyadi; Mulyadi, Dodi; Amir, Amir; Supriyanto, Agus; Aulia Nanda, Rizki
Jurnal Mekanik Terapan Vol 6 No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i3.7848

Abstract

Perusahaan manufaktur sangat membutuhkan perangkat untuk pengecekkan hasil produksi, perangkat tersebut dinamakan dengan JIG, JIG sendiri merupakan sebuah tatakan. Apabila barang produksi akan disambung maka dibutuhkan JIG untuk metata hasil produksi, namun pada penelitian ini JIG dibutuhkan untuk proses pengecekkan hole hasil produksi dudukan shockbreaker. Tujuan dari penelitian ini adalah melakukan optimasi desain JIG agar dilakukan pengecekkan suaian lubang duduk shockbreaker dan datum pada JIG. Urgensi penelitian ini adalah pentingnya optimasi agar produk dapat dilakukan pengecekkan yang sesuai dengan JIG yang akan digunakan sebagai alat pengecekkan. Metode penelitian yaitu melakukan pengukuran dudukan shockbreaker pada 4 bagian lubang menggunakan mistar mm dan jangka sorong digital, setelahnya dilakukan proses desain CAD. Selanjutnya pemilihan material, material yang digunakan adalah S45C. Proses manufaktur menggunakan CNC. Hasil penelitian menunjukkan pada lubang 1 tidak ada toleransi, pada lubang 2 P = +0,02 mm dan L = +0,03 mm, pada lubang 3, D = -2 mm dan pada lubang 4 P = +0,025 mm L = -0,03 mm. Penentuan toleransi tersebut agar datum untuk check hole pada dudukan suaian pas. Penelitian ini mengacu pada penelitian Abdullah et.al yang berjudul Computer-Aided Design of Traditional Jigs and Fixtures yaitu pentingnya nilai toleransi untuk medapatkan suaian hasil pembuatan JIG.
Analisis Perubahan Waktu dan Tekanan Injeksi terhadap Massa dan Kualitas Produk pada Proses Injection Moulding Serfandi, Dina Novera; Fahmiy, Muh Ilham; Hidayati, Alfiana Nur; Prayogo, Dhanang Suryo; Sulistyono, Sulistyono
Jurnal Mekanik Terapan Vol 6 No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i3.7880

Abstract

The plastic injection moulding process is a dominant manufacturing method for producing high-precision components. Final product quality is highly dependent on process parameters, particularly injection time and injection pressure. This study aims to quantitatively analyze the influence of these parameters on product weight and quality, specifically in mitigating common defects such as shrinkage and short shots. Utilizing polypropylene material, a factorial experimental design was implemented by varying injection time 3,5 s, 4 s, 4,5 s and pressure 36 bar, 37 bar, 38 bar. Each parameter combination was replicated five times to ensure data validity. Product weight was measured using a digital scale, and visual quality was manually evaluated. The findings indicate that increases in injection time and pressure significantly enhanced product weight and reduced defects. An optimal combination of a 4 s injection time and 37 bar pressure was identified, yielding products with consistent weight and superior visual quality. These results offer practical guidance for optimizing production processes and improving efficiency. Keywords: Injection Moulding, Injection Time, Injection Pressure, Product Quality.
Variasi Temperatur Termophilic Pada Digester Biogas Berbahan Baku Limbah Kulit Durian Prakasa, I Made Panji Tirta; Sutasoma, I Wayan Gde; Tapa, I Gede Fery Surya; Dayanti, Made Ari Riska
Jurnal Mekanik Terapan Vol 6 No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i3.7910

Abstract

The global energy crisis and Indonesia's dependence on fossil fuels (BBF) have driven the need to explore renewable energy sources. Biogas, as a sustainable solution, is produced through anaerobic degradation of materials with methane (CH₄) 50–75% and carbon dioxide (CO₂) 30–45% as its dominant components. Agro industrial waste such as durian peel shows great potential for biogas production, as Indonesia produces more than 19 thousand tons of durian annually according to the 2024 Statistics Indonesia report. Utilizing durian peel is ideal since its composition (65–80%) is significantly higher than that of the pulp (20–35%) and seeds (5–15%). This study employed a substrate ratio of 5 grams of total solids (TS) + 100 mL of inoculum + 200 mL of distilled water, with intermittent stirring (three times per day, 1 minute per session). The tested temperature variations under thermophilic conditions 40°C, 45°C, and 50°C, including one control without heating. The analysis focused on daily pressure accumulation and gas composition profiles (CH₄ and CO₂). The results show that 40°C (thermophilic condition) achieved maximum efficiency due to optimal methanogenic microbial activity, producing higher methane (CH₄) yield compared to other temperatures. This study contributes to the development of renewable energy from agricultural waste in tropical regions and supports Indonesia’s national energy transition program.
Perencanaan Layout 3D untuk Sistem Pengolahan Air Limbah di Kapal Penumpang Pramesti, Lely
Jurnal Mekanik Terapan Vol 6 No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i3.7921

Abstract

As an archipelagic nation, Indonesia relies heavily on passenger ships to maintain inter-island connectivity. However, the operation of these vessels generates domestic wastewater that may cause marine pollution if not properly managed. A vacuum based piping system offers an efficient technical solution especially suitable for limited onboard space. This study aims to design a 3D layout of a vacuum assisted sanitary wastewater collection system and to calculate the required vacuumarator capacity to transfer waste from toilets and sinks to a holding tank for further treatment by STP. The research applied an engineering design approach consisting of five stages: regulatory review, technical data collection, vacuum capacity calculation, component specification comparison, and 3D modeling. Results show that the required vacuum capacity ranges from 490 to 840 flushes per hour, depending on whether ISO or vendor calculation. The Jets 15MB-D was selected due to its compatibility with the minimum STP capacity, energy efficiency, lightweight and compact, and suitability with DN40 pipe connections. The 3D layout places the vacuumarator near the STP to minimize pressure loss and simplify maintenance. The proposed design complies with MARPOL Annex IV and BKI rules and can serve as a reference for retrofitting sanitary systems on domestic passenger ships.
Evaluasi Serat Sabut Kelapa Sebagai Bahan Penguat Roda Gigi Nasaruddin, Nasaruddin; Johanis, Alexius Leonardo; Wabang, Jhon Arnoldos; Hattu, Edwin Pieter Dominggus; Abanat, Jufra Daud J.
Jurnal Mekanik Terapan Vol 6 No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i3.7951

Abstract

Coconut fiber has great potential as a composite material. This is supported by the abundant availability of coconut fiber waste and its excellent mechanical properties, as evidenced by several studies. Composites made with natural fibers are currently in high demand due to their advantages, including low density, low cost, biodegradability, corrosion resistance, heat resistance, light weight, abundance, renewable energy, and good mechanical properties. The purpose of this study was to obtain the best mechanical properties for composites using coconut fiber as the reinforcement. This study was conducted by varying the coconut fiber reinforcement with several volume fractions: 20%, 30%, 40%, and 50%, with the matrix used being Unsaturated Polyester Resin Yukalac 157 BQTN. The composite manufacturing process used the hand lay-up method with random fiber arrangement. Bending test results showed the highest load at 20% volume fraction of 798 N and a bending strength of 262 N/mm². Meanwhile, the highest impact strength occurred at 50% volume fraction of 0.0472 J/mm².Kata-kata kunci: Penguat, Roda Gigi, Sabut, Kelapa, Komposit

Page 13 of 14 | Total Record : 134

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