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Rumpun Teknik Mesin, Fakultas Teknik, Universitas Negeri Jakarta
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INDONESIA
Jurnal Konversi Energi dan Manufaktur
Published by Universitas Negeri Jakarta
ISSN : 23392029     EISSN : 26225565     DOI : https://doi.org/10.21009/JKEM
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
This journal aims as a medium for lecturers, researchers and practitioners to discuss result of their research in the field of mechanical engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 9 Documents
 1 
Search results for , issue "Vol. 10 No. 1 (2025)" : 9 Documents clear
Production Planning of Cassava Chips in Small Home Business Rohmatin, Yuyun Yuniar; Wahyuni, Rossi Septy; Raharja, Mei; Fauzia, Siva
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.3

Abstract

The production process of cassava chips begins with the preparation of cassava raw materials and then the process of separating the skin from cassava. The process of cutting cassava into a certain size uses a special machine that is operated manually. The process of frying cassava using a large pan and the process of packaging into plastic are the last step of production. Planning the production of cassava chips starts with preparing the needs of raw materials for production for 3 days in a week ordered from 3 different suppliers to prepare production needs, the quantity needed in purchasing from suppliers includes 120 kg of cassava, 9 kg of red chili, 1 kg of garlic, 3 kg of lime, 27 kg of cooking oil, 9 kg of sugar and 0.25 kg of salt. The initial supply of cassava raw materials provided is 120 kg and at the end of the week the production inventory needs are 80 kg left from the use of 40 kg at the end of the week for the next production.
Analysis of Print Speed Variations Effect and Nozzle Temperature on the Tensile Strength of 3D Printed TPU-95A Products Gulo, Triadesman; Mardiyana, Dani; Sumarno, Dodi Iwan
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.6

Abstract

This study aims to analyze the effect of print speed and nozzle temperature variations on the tensile strength of TPU-95A material printed using the fused deposition modeling (FDM) method. The varied parameters include print speeds (70, 80, and 90 mm/s) and nozzle temperatures (230 and 240 °C). Tensile test specimens were produced using an Ender-3 Pro 3D printer according to the JIS K6251-2017 standard and tested with a Shimadzu AGS-X 10kN tensile testing machine. The results showed that the combination of a 90 mm/s print speed and a 230 °C nozzle temperature yielded the highest tensile strength of 318.74 kgf/cm². Conversely, the lowest tensile strength of 212.20 kgf/cm² occurred at a 90 mm/s print speed and a 240 °C nozzle temperature due to thermal degradation of the material. This study highlights the importance of selecting optimal printing parameters to enhance the mechanical strength of 3D-printed products made from TPU-95A.
Analysis of the Effect of Print Speed and Layer Height on the Hardness of TPU-95A Filament 3D-Printed Products Lesmana, Rizal; Mardiyana, Dani; Sumarno, Dodi Iwan
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.2

Abstract

The effect of print speed and layer height settings can influence the mechanical properties of 3D-printed products; however, the impact of print speed and layer height on the hardness of products printed with TPU-95A filament has not been extensively studied. This research employs an experimental method by creating specimens according to ASTM D2240 standards, using various print speed settings (70, 80, and 90 mm/s) and layer heights (0.15 and 0.20 mm). The results show that a combination of lower print speeds and thinner layer heights yields higher hardness test results. A print speed of 90 mm/s and a layer height of 0.15 mm produced the highest hardness, while the combination of 90 mm/s print speed and 0.2 mm layer height resulted in the lowest hardness. This study contributes to the optimization of 3D printing parameters for flexible material applications, such as TPU-95A, in relation to product hardness outcomes.
Structural Strength Analysis of Car Deck Re-Layout Impact on Ro-Ro Ships Using Structural Analysis Method Putra, Ferdie Hanafi; Priyambodo Nur Ardi Nugroho; Herijono, Boedi
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.7

Abstract

This study focuses on analyzing the structural strength of car deck construction in roll-on/roll-off (ro-ro) passenger ships. Ro-ro ships are designed to transport both vehicles and passengers, in which vehicles can drive in and out under their own power. While these ships are operational, there is a potential for improvement in their construction strength, particularly in the car deck area. The car deck is a critical structural component as it bears both vehicle loads and supports the upper decks. This research analyzes the car deck's structural integrity, which was initially designed for trucks and sport utility vehicles (SUV), under various conditions including calm water, sagging, and hogging scenarios. Using both finite element method (FEM) analysis through ANSYS software and manual calculations via Excel, the study evaluates maximum stress points and deflection. The 3D modeling was completed using Fusion 360, while 2D drawings were created in AutoCAD. Results revealed that the highest stress occurs during hogging conditions with truck loads, showing 188.23 MPa stress and 0.077128 m deflection. With a safety factor of 1.3281, these values comply with Indonesian Classification Bureau (BKI) standards, which require stress below 250 MPa and a safety factor above 1.
Reconditioning and Enhancement of Automatic Pressure Control Equipment for Servo and Regulatory Processes Suryadi, Aris; Budi Triyono; Hanni Maksum Ardi; Dibyo Setiawan
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.1

Abstract

Control Systems have taken essential parts widely from industrial world to military equipment. Control systems in the industrial world determine the quality, speed, cost and efficiency of the manufacturing process known as the Process Control System (PCS). The core of the Control System is conditioning (actuators) and reading conditions (sensors). By synergizing those parts with the coordination of the controller, the process value (PV) can be obtained according to the condition of the set point (SP). To get the proper control characteristics, i.e. the fastest possible response, the lowest possible oscillation and offset (error steady state/ESS), an understanding of the concept of a closed loop control system with a continuous scheme is developed. In this regard, the Automatic Control Laboratory under the Pneumatic and Hydraulic Laboratory at the Department of Mechanical Engineering - POLBAN considered to provide students with an introduction to Automatic Instrumentation and Control. The briefing covered the introduction, mechanism and operation of Automatic Instrumentation and Control systems. Therefore, tools were required as a medium for achieving the above competencies, one of which was the modernization of pressure regulators in order to strengthen the Laboratory. Through this research, a rejuvenation and modernization of the control system were carried out by applying a proportional, integral and differential (PID) control system. It was based on a programmable logic controller (PLC) equipped with a human machine interface (HMI) to make it easier to enter set points and PID parameters, to be practical in operation and effective in monitoring and data acquisition. The result of the pressure regulator modernization had the ability to include servo control process (getting a certain value) and regulatory control process (maintaining a certain value) with a continuous closed loop scheme. The modernized pressure control system could be utilized as a prototype demonstration of the system in an actual environment to study and observe the Proportional, Integral and Differential (PID) control system along with the process of determining the parameters Kp, Ti and Td as Practicum equipment.
Analysis of Corrosion Rate in Low-Carbon Steel ASTM A36 and AISI 1020 in Sulfuric Acid Solution Using Heat Treatment Temperature and Immersion Time Variations Wiradinata, Trisna Ardi; Daryus, Asy'ari; Sugiyanto, Didik; Nopryandi; Ikhsan, Muhammad
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.5

Abstract

This study investigates the corrosion rate of low-carbon steel ASTM A36 and AISI 1020 in sulfuric acid solution under varying heat treatment temperatures and immersion times. Samples were subjected to heat treatment at 600, 820, and 1100 °C, followed by immersion for 24, 48, and 72 hours. The results reveal significant effects of heat treatment temperature and immersion duration on corrosion performance. At 600 °C with a 72-hour immersion, ASTM A36 exhibited a corrosion rate of 140.68 mm/year, while AISI 1020 showed 149.07 mm/year. At 820 °C, the corrosion rates for ASTM A36 and AISI 1020 were 102.34 mm/year and 96.48 mm/year, respectively. At 1100 °C, ASTM A36 demonstrated a corrosion rate of 87.97 mm/year, compared to 121.08 mm/year for AISI 1020. The findings highlight that increasing heat treatment temperature generally reduces the corrosion rate, though the effect varies by material.
Triangle Velocity Analysis of the Pelton Turbine Design in Microhydro Power Plant Setiawan, Dibyo; Yowando Putro Wicaksono; Herbert Hasudungan Siahaan; Cahyo Wibowo; Fisika Prasetyo Putra
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.4

Abstract

During the period of 29 years, the Central Java Provincial Government has implemented strategic research formulation for flood reduction efforts. One solution for flood management is building a dam. The built dam has the potential to generate electricity. The purpose of the activity is to analyze the turbine speed triangle from the results of the technical design. The method used is the analysis of the turbine speed triangle at an entry angle of 12-14°. The results of the triangle analysis obtained show the F value at 14-12° of 34695.5, 34761.6, and 34847.7 N.m. Torque at 14° were 5313, 5320, and 5330 N.m. Torque at 13° were 5363, 5370, and 5380 N.m. Torque 12° were 5401, 5409, and 5418 N.m. P at 14-12° were 641.5, 642.9, and 644.1 kW. The efficiency of ηo and ηm is 0.90 % and 0.95 %. The conclusion of the application of the turbine speed triangle analysis at an angle of 4-6° is that the optimum turbine efficiency is at an opening angle of 12° with the ability to increase turbine power by 14.79 % and efficiency by 14.66 %.
Comparison of the Efficiency of Solar PV Fixed, Single-Axis, and Dual-Axis Solar Trackers: A Review Efendi, Mas; Mainil, Rahmat Imam; Aziz, Azridjal
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.9

Abstract

The global energy shortage, especially in developing countries, drives the search for alternative energy sources such as solar power, which is one of the cleanest energy sources. This research discusses the comparison of efficiency between solar PV fixed, single-axis solar trackers, and dual-axis solar trackers. The method used is a survey of the literature of multiple studies that only analyzes the efficiency of solar PV using different tracking devices. The efficiency data is normalized based on location factors and light intensity for a fair comparison. The results show that fixed solar panels are stationary and simple, serving as a baseline with 100 % efficiency. Single-axis panels track the sun horizontally, boosting efficiency by 25.6 % but with moderate complexity due to motors and controls. Dual-axis panels track the sun both horizontally and vertically, increasing efficiency by up to 50 % but with the highest complexity due to more moving parts and dual-axis control systems.
Electric Vehicle Review: BEV, PHEV, HEV, or FCEV? Kusuma, Idris; Ruliyanta; Kusumoputro, R. A. S.; Iswadi, Agung
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.8

Abstract

Electric vehicles (EVs) are rapidly advancing as a sustainable transportation solution in the global effort to reduce carbon emissions. There are four main types of EVs: battery electric vehicles (BEVs), plug-in hybrid electric vehicles (PHEVs), hybrid electric vehicles (HEVs), and fuel cell electric vehicles (FCEVs). This article reviews each EV type's advantages, limitations, and prospects based on energy efficiency, carbon emissions, technological development, and infrastructure readiness. The findings indicate that BEVs hold the most significant potential for personal vehicles and urban transportation, while FCEVs are more suited for heavy-duty and long-distance applications. PHEVs and HEVs are considered transition solutions, but their relevance is expected to decrease as technology and global policies evolve. BEVs provide zero emissions. PHEVs provide high flexibility, while HEVs do not require charging infrastructure, and FCEVs offer zero emissions and long-range and fast charging times. FCEV can travel up to more than 800 KM, which is very promising for the distance travelled problem, which is a challenge for electric vehicles.

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