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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 138 Documents
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Analisis Sifat Mekanik dan Penyerapan Air Komposit Polyester Berbasis Serat Alami Kus Andrianto, Sis Nanda; Maulana, Jibril; Sentosa Riyanto, Obaja Eden; Tsamroh, Dewi Izzatus; Nur Sasongko, Muhammad Ilman; Andromeda, Tata; Simangunsong, Rahel; Fahrozy, Muhammad Micho
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.v6i3.7978

Abstract

Natural fibers are increasingly utilized as reinforcing materials in the modern materials industry. In this study, composites comprising 15% untreated coconut fiber, pineapple leaf fiber, palm fiber, corn husk fiber, or sugar cane fiber and 85% polyester were fabricated. Water absorption was evaluated by immersing the composites for 3, 7, 14, and 21 days. The tensile strength and morphology of unsoaked composites were also assessed to determine the influence of fiber type. Water absorption increased with immersion time for all composites, although the trends varied among fiber types. The coconut fiber composite exhibited the highest water absorption rate, whereas the pineapple leaf fiber composite demonstrated the lowest. The pineapple leaf fiber composite also achieved the highest tensile strength. In contrast, composites containing coconut fiber, palm fiber, corn husk fiber, and sugar cane fiber displayed lower tensile strength, attributed to imperfect interfacial bonding between the fibers and the polyester matrix.
Analisis Pengaruh Masukan Udara pada Ruang Bakar Boiler Pipa Api Kapasitas 100 Kg/ Jam untuk Meningkatkan Efisiensi Energi Gafur, Abdul; Zulkarnain, Zulkarnain; Sunarto, Sunarto; Syafika, Nurul
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.v6i3.7986

Abstract

This study aims to improve the energy efficiency of a 100 kg/h fire-tube mini boiler through combustion chamber redesign and analysis of air intake variations. The redesign was conducted using SolidWorks software with thermal insulation made of bricks, cement, sand, and refractory cement to reduce heat loss. Experiments were carried out by varying blower air velocity from 3 to 17 m/s, measuring combustion chamber temperature, steam temperature, water temperature, pressure, fuel consumption, and energy efficiency. The results show that an air velocity of 11 m/s achieved the best performance, with a maximum efficiency of 86% at 1 bar pressure. Efficiency decreased at lower air velocity due to limited oxygen supply and at higher velocity due to excessive air absorbing heat energy. The redesigned combustion chamber produced more stable combustion, reduced fuel consumption, and improved continuous steam production
Analisis Pengaruh Campuran Biodiesel terhadap Performa dan Emisi Gas Buang Mesin Diesel Common-Rail Pratiwi, Ilham Ayu Putri; Krisnaputra, Radhian; Bahiuddin, Irfan; Djati, Isworo; Nugraha, Sindhu Arya
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.v6i3.8042

Abstract

This study aims to analyze the effect of biodiesel blend variations on the performance and exhaust emission characteristics of a diesel engine equipped with a Common-Rail Direct Injection (CRDI) system. The experimental tests were conducted using two types of fuel, namely B50 (50% biodiesel and 50% diesel) and B100 (pure biodiesel). The evaluated parameters included fuel consumption (FC), specific fuel consumption (SFC), and exhaust emissions consisting of CO, CO₂, NO, NOₓ, O₂, and SO₂. Tests were performed at three engine speeds (800, 1000, and 1500 rpm) and three electrical load levels (600 W, 1000 W, and 2000 W). The results showed that both FC and SFC increased with higher engine speed and load, where the average SFC of B100 was 5–15% higher than that of B50 due to the lower calorific value of biodiesel. In terms of emissions, the use of B100 reduced CO concentration by up to 10% compared to B50, while NOₓ emissions increased by approximately 15–25% at higher speeds. SO₂ emissions were recorded at 0 ppm under all test conditions, indicating that biodiesel is sulfur-free. These findings confirm that pure biodiesel can be effectively utilized in modern diesel engines with common-rail injection systems, providing good combustion efficiency and contributing to the reduction of exhaust gas emissions.
Konveyor dan Pendinginan dalam Pengasapan Ikan Semi Otomatis: Sebuah Pendekatan Technopreneurship untuk Meningkatkan Kualitas Produk Ismail, Edy; Alghozi, Haidar Abroru; Sugiyarto, Sugiyarto; Nur, Hamid Ramadhan; Ramadhan, Muhamad Fajar; Abdurahman, Abdurahman; Mulyono, Mulyono; Trisyono, Trisyono
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.v6i3.8055

Abstract

The fish smoking industry in Wonosari Village, Demak Regency, produces around 20-25 tons daily, relying on traditional methods that often result in inconsistent quality and compromised hygiene. This study seeks to boost efficiency and product quality by introducing semi-automatic smoking technology powered by technopreneurship principles. The technology integrates conveyor systems and rapid cooling to streamline the smoking process. Using an experimental approach with a technopreneurship twist, the research team collected data through observations, interviews, and prototype testing at Sentra Asap Indah. The testing focused on temperature control, smoking duration, and product quality analysis, including texture, aroma, and food safety. The prototype demonstrated significant efficiency gains, cutting smoking time by 30% and standardizing the process. The rapid cooling system successfully brought the fish temperature down from 80°C to 30°C within 30 minutes, a crucial step in preventing bacterial growth and preserving texture. The overall quality of the smoked fish, in terms of color, taste, and aroma, showed consistent improvement. By integrating conveyor systems for process standardization and rapid cooling for enhanced food safety, this technopreneurship initiative has the potential to increase the competitiveness of local smoked fish products and drive business sustainability.
Design and Development of a Vertical-Type Hydraulic Ram Pump Simulator Widiawaty, Candra Damis; Millah, Azzam; Rasyid, Muhammad; Putri, Nuke Earlyana; Putri, Maytasha Gusti; Nurdiansyah, Muhammad; Fatin, Shafa Amatullah
Jurnal Mekanik Terapan Vol 7 No 1 (2026): April 2026
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v7i1.8238

Abstract

The hydraulic ram pump is one form of green energy used to convey water by utilizing the water hammer effect. The main parameter influencing the performance of a hydraulic ram pump is the water energy source. Most researchers modify the hydraulic ram pump design based on the installation site, which limits the variation of design or operating conditions due to the complexity and geographical constraints in the field. The main contribution of this work is the development of a vertical-type hydraulic ram pump simulator that enables controlled laboratory investigation of design modifications and operating parameter optimization, overcoming the limitations of site-specific field installations. The research applies a design and experimental method. The design process begins with defining design constraints and calculating the flow based on the Bernoulli equation, flow rate, head loss, and rule-of-thumb operational conditions for hydraulic ram pumps. The results show that the flow rate significantly affects the pump efficiency. Flow rates of 0.6 L/s, 0.8 L/s, 0.9 L/s, and 1 L/s. The range pressure of P1 are 50-60 mBar, 8-90 mBar, 80-120 mBar, and 100-140 mBar.  The range pressure of P2 are 120-125 mBar, 20-40mBar, 20-40mBar, and 85-120 mBar. Therefore, the yielded average efficiencies are 5.3%, 1.6%, 3.9%, and 3.5%, respectively. The developed hydraulic ram pump simulator achieved the highest efficiency (5.3%) at a flow rate of 0.6 L/s, P1 50-60 mBar, and P2 120-125 mBar. It can be observed that an increase in drive pipe flow rate does not always correspond to an increase in efficiency. However, the efficiency is more strongly determined by the pressure generated by the water hammer.
Design and Development of a Line-Following Automatic Guided Vehicle (AGV) Model as a Food and Beverage Delivery Platform Luqyana, Dhiya; Putri, Nuke Earlyana; Muslimin, Muslimin; Milah Muhamad, Azam
Jurnal Mekanik Terapan Vol 7 No 1 (2026): April 2026
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v7i1.8282

Abstract

An Automatic Guided Vehicle (AGV) is an automated vehicle used to support the delivery of food and beverages in restaurant service systems, where manual methods still carry risks of delays and spillage. This study designs and builds a line-following AGV using a Quality Function Deployment (QFD) approach with screening and scoring concepts to translate user needs into the technical specifications of the device. The research stages include needs identification, mechanical and electronic design, Arduino programming, and track testing. The AGV is capable of following a path with high accuracy using infrared sensors, automatically stopping at the destination, and detecting obstacles via ultrasonic sensors, with a buzzer serving as a delivery indicator. Test results show stable delivery performance with a relatively low spillage rate of 10%–13.33%. The AGV measures 40 × 30 × 43.6 cm, uses a 12 V battery, two DC motors, has a speed of 0.25 m/s, a maximum load capacity of 2 kg, and is controlled by an Arduino Uno with an integrated sensor system.
Evaluation of 850°C Heat Treatment: Effects of Used-Oil Quenching, Brine Quenching, and Pack Carburizing on the Rockwell Hardness of ST37 Shredder Blades Fajrul, Rahmat; Setyawan, Reinaldi Teguh; Ahmad, Zaid; Gunawan, Gunawan
Jurnal Mekanik Terapan Vol 7 No 1 (2026): April 2026
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v7i1.8320

Abstract

Waste shredder blades operate under abrasive contact and intermittent impacts from heterogeneous materials, making surface hardness a key property for maintaining cutting performance and reducing premature dulling. This study evaluates the effect of a 850°C heat-treatment route on the hardness of ST37 low-carbon steel used for shredder-blade applications. Plate specimens (100 mm × 100 mm × 10 mm) were prepared and tested under four conditions: untreated (as-received), pack carburizing using coconut-shell charcoal followed by furnace cooling, quenching in used oil, and quenching in saltwater (brine). Hardness was measured using the Rockwell C method (ASTM E18) with a diamond cone indenter (10 kgf minor load and 150 kgf major load). For each condition, ten hardness readings were collected and analyzed using one-way ANOVA (α = 0.05).The untreated specimens yielded an average hardness of 83.85 HRC. The pack-carburized and furnace-cooled condition resulted in a substantial decrease to 69.35 HRC, accompanied by higher variability, indicating a less favorable hardness response under the applied cooling route. In contrast, quenching after heating at 850°C increased hardness to 85.55 HRC for used-oil quenching and 88.35 HRC for brine quenching, with brine showing the highest mean value but also a wider scatter. ANOVA confirmed that the treatment route significantly influenced hardness (p < 0.05). Overall, the results indicate that, under the present parameters, quenching routes are more effective than the pack carburizing + furnace cooling route for improving blade hardness, while process consistency is important to control hardness dispersion, particularly for brine quenching.
Characterization and Modeling of Pedal Torque in a Regenerative Bicycle Trainer Using Current Control Prayoga, Adi; Mauludi, Fajar; Sabilul Huda, Muhammad Ravi; Putri Herwandi, Kasih Aisyah; Darmawan, Adytia; Satriyanto, Edi; Arief, Zainal
Jurnal Mekanik Terapan Vol 7 No 1 (2026): April 2026
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v7i1.8357

Abstract

Regenerative bicycle trainers support more sustainable indoor cycling by converting a rider’s kinetic energy into electrical energy while producing a controllable resistive load. For a realistic riding feel, the relationship between commanded braking current and pedal torque must be accurately defined. This study develops and validates an empirical current-torque model for a trainer based on a brushless direct current (BLDC) motor using a second-order polynomial. Experiments were conducted on two sprocket configurations (32-tooth and 12-tooth), with 11 braking current setpoints ranging from 0 to 10 A under steady-state conditions. The model was evaluated through its inverse form using five torque setpoints for each configuration. Results show strong agreement with experimental data, with coefficients of determination ( ) exceeding 0.998. The 12T configuration achieves higher accuracy, with a Mean Percentage Error of 1.55%, compared to 9.20% for the 32T configuration. This is likely due to improved torque transmission and more stable friction drive behaviour at higher loads. Negative quadratic coefficients indicate mild nonlinearities consistent with magnetic saturation. The model is suitable for feedforward control, enabling realistic torque simulation without requiring expensive external torque sensors.

Page 14 of 14 | Total Record : 138

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