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Jurnal Elemen
Published by Politeknik Negeri Tanah Laut
ISSN : 24424471     EISSN : 25812661     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering
Jurnal Elemen is a media for publishing scientific articles in the field of mechanical and automotive engineering which are published regularly in June and December each year. All articles presented are the results of research, conceptual ideas and reviews in the field of mechanical and automotive engineering that have never been published before. Jurnal Elemen managed by P3M in the Tanah Laut State Polytechnic has been ISSN, namely the printed version of ISSN 2442-4471 and online version of ISSN 2581-2661, and for now the Elementary journal has been indexed in ISJD (Indonesian Scientific Journal Database) in PDII-LIPI . then it can be indexed and accredited at SINTA, DOAJ and Scopus.
Arjuna Subject : -
Articles 279 Documents
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PENGARUH LAMINAT SERAT RAMI DAN KARBON TERHADAP SIFAT MEKANIK KOMPOSIT HYBRID MATRIKS TUNGGAL EPOXY Cahyo Sasmito; Adityo Noor Setyo H.D; M. Fendy Kussuma H.S
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

. Composite materials have developed rapidly over the years and now play an important role in the advancement of materials technology. It is believed that the use of mixed (hybrid) composites between natural fibers and artificial (synthetic) fibers can produce better composites. This research aims to determine the effect of the arrangement of hybrid composite laminates reinforced with hemp fiber and carbon fiber using an epoxy resin matrix on mechanical properties, namely tensile strength and impact toughness. The composite was made using the hand lay up method with variations in the laminate composition, namely Carbon-Hemp-Carbon-Hemp and Hemp-Carbon-Carbon-Hemp. The hemp fiber was treated with alkali by soaking in 5% Naoh for 2 hours. The research results show that of the two specimen variations, the Hemp-Carbon-Carbon-Hemp variation has the highest tensile strength value of 245 MPa with the highest strain reaching 0.074 while the highest elastic modulus in the Carbon-Hemp-Carbon-Hemp variation is 6.04 GPa. Charpy impact testing obtained the highest impact value in the Hemp-Carbon-Carbon-Hemp variation of 0.07762 J/mm².
DESAIN PERANCANGAN MESIN PEMOTONG KENTANG MULTIFUNGSI Arif Rohman
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.334

Abstract

We often encounter potatoes in traditional and modern markets. Potatoes are very easy to process into various kinds of food, one of which is French fries. For this reason, this research has produced a multifunctional potato cutting machine design that is time efficient, fast in cutting potatoes, and is also a portable machine. The results of this multifunctional potato cutting machine design resulted in the design of machine components such as a potato funnel hopper with dimensions of 300 mm x 80 mm x 222 mm, a potato pusher with dimensions of 80 mm x 114 mm, and the main frame of the machine with dimensions of 421 mm x 300 mm x 380 mm. Then there are 3 variants of cutting knives consisting of flat, long/stick and soft cutting knives. Apart from that, the knife driver used is an electric motor and other drive transmission. Overall, the results of this design produce a design drawing for a potato cutting machine with dimensions of 421 mm x 300 mm x 544 mm.
ANALISIS PENGARUH DESAIN HEATSINK TERHADAP EFISIENSI PANEL SURYA MENGGUNAKAN METODE COMPUTATIONAL FLUID DYNAMIC (CFD) Ari Irawan
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.338

Abstract

The growing demand for energy aligns with the increasing intensity of human activities. Most energy currently relies on non-renewable fossil fuels such as oil, coal, and natural gas, which will eventually deplete if continuously used. Renewable energy serves as a potential alternative to address this issue, one of which is solar energy. Solar energy can be converted into electricity using solar panels, which currently have an efficiency of 14–20% at 25°C. However, every ±1°C temperature increase reduces solar panel efficiency by 0.5%. To mitigate this issue, a cooling system is required to lower the temperature of the solar panels. One such cooling method is passive cooling using heatsinks. This study aims to analyze various heatsink designs that achieve the most significant temperature reduction in solar panels and examine the impact of these designs on solar panel efficiency. The method used in this research is Computational Fluid Dynamics (CFD). The heatsink design variations studied include wave-shaped, square, and triangular designs made from aluminum, copper, and an aluminum-copper alloy. The solar panels used have capacities of 50 WP, 100 WP, and 120 WP. The results show that a 50 WP solar panel equipped with a wave-shaped heatsink made of copper achieves the lowest temperature, 45.85°C, with the smallest efficiency reduction of 13.44%.
ANALISIS AESO POLYMER COATING PADA SERAT WARU TERHADAP SIFAT MEKANIK, PENYERAPAN AIR DAN MORPHOLOGY KOMPOSIT POLYESTER Suteja; Herlina Sari; Syarif Hidayatullah
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.340

Abstract

In this study, a method of improving the performance of Waru fiber reinforcement composites by NaOH and AESO coating treatment is reported. Waru fiber (WF) as composite filler was varied raw WF (WR), NaOH treated WF (WH) and NaOH+AESO coating treated WF (WHC) and tested for mechanical characteristics, water absorption, and morphology of the composites. The results showed that the bending and tensile strength increased the highest by 27.65% and 58.66% respectively for WHC composites. AESO coating treatment decreased the elongation percentage of the composite but increased the elastic modulus of the composite. The SEM photo morphology of the composites showed fiber clumping, fiber pull out, and trapped voids. NaOH-treated WF showed better interface bonding with the polyester matrix. For the AESO coating treatment, the WF-polyester matrix surface interaction was observed with hackles appearing on the composite fracture surface.
PERANCANGAN DAN SIMULASI PEMBUATAN CETAKAN TELAPAK KAKI PALSU Achmad Budi Ramadhan
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.341

Abstract

A prosthetic foot mold can be created using CAD technology. With the help of CAD software, the creation of a prosthetic foot mold can produce multiple sizes using just one size as the initial reference. The initial shape of the prosthetic foot can be obtained through a 3D scanning method, which can then be processed by CAD software. Once the mold design is complete, a fabrication simulation process can be performed using CAM software. This method enables the mass production of permanent prosthetic foot molds quickly and efficiently.
ANALISIS KARAKTERISRIK KARBON TONGKOL JAGUNG SEBAGAI PENDUKUNG KATALIS FUEL CELL DENGAN MENGGUNAKAN REAKTOR PIROLISIS TIPE FIXED BED Danu Prasetyo
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.366

Abstract

Energy is a basic need that can support many things. Fossil energy accounts for 80% of the world's needs, this energy has an environmental impact. One of the new renewable energy (EBT), namely fuel cell, in its development has obstacles where the catalyst is expensive. This study aims to determine the characteristics of pyrolysis activated carbon as a catalyst supporting carbon fuel cell. corn cob waste is processed into activated carbon by being influenced by temperature and holding time. The temperature variation of the study was 400° and 500° with a residence time of 60 Minutes. The resulting carbon is tested proximate to determine the water content, ash content, volatiles, and bound carbon content. Based on the proximate test, the temperature variation of 400 ° produces the highest moisture content in the figure of 8.8% but still meets SNI No.06-3730-1995. The temperature variation of 500° produces the highest bound carbon at 74.35% in accordance with SNI No.06-3730-1995 so that it has the potential to support fuel cell catalysts.
PENGARUH VARIASI SUHU DAN WAKTU TINGGAL PIROLISIS TERHADAP NILAI KADAR AIR ARANG KARBON DARI BIOMASSA BATANG UBI KAYU Lutfi Dwi Hernawan
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.371

Abstract

Cassava stem waste, abundant in Indonesia (90% post-harvest), shows high potential as a carbon raw material due to its lignocellulose content. This research investigates the effect of pyrolysis temperature and residence time on the moisture content of the resulting carbon charcoal. Using an experimental method with a fixed-bed reactor, cassava stem biomass was pyrolyzed at varying temperatures of 300℃ and 400℃, and residence times of 15 minutes and 30 minutes, and then tested for its moisture content. The results indicate that the charcoal's moisture content tends to increase with rising temperature and residence time, attributed to an increase in the charcoal's hygroscopic properties. Nevertheless, all testing variations produced charcoal with a moisture content below 15% as per SNI 06-3730-1995, with the lowest moisture content (3.8%) achieved at 300℃ and 15 minutes.
MAINTENANCE SELANG ATAU JARUM (VIBRATION NEEDLE) PADA MESIN VIBERATOR INTERNAL PT. WKB Bagas Dwi Prayoga
ELEMEN : JURNAL TEKNIK MESIN Vol. 13 No. 1 (2026)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v13i1.367

Abstract

The maintenance of hoses or needles (vibration needles) in internal vibrators is crucial to ensure the quality of concrete production at PT. WKB. The main issue addressed in this internship report is the frequent damage to vibration hoses, which reduces work efficiency. The purpose of this activity is to understand the proper maintenance methods to extend the equipment's service life. The methods used include field observations, literature studies, and interviews with technicians. The findings show that breakdown maintenance is still predominantly applied, with common damages such as wear on the flexible shaft and needle head. Routine maintenance, such as lubrication, cleaning, and checking connections, can significantly reduce the frequency of breakdowns. In conclusion, consistent application of preventive maintenance improves the reliability of internal vibrators and supports the smooth production of precast concrete.
ANALISIS DESAIN DAN KEKUATAN MATERIAL FIRE TRUCK WATER TANK KAPASITAS 800L DENGAN METODE COMPUTER AIDED ENGINEERING (CAE) Lintang Riady Atmaja; Fuad Hilmy; Raka Mahendra Sulistiyo; Herru Santosa Budiono
ELEMEN : JURNAL TEKNIK MESIN Vol. 13 No. 1 (2026)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v13i1.368

Abstract

The water tank is a critical component of a fire truck, serving as the main water reservoir during firefighting operations. Selecting the right design and material greatly affects the vehicle’s performance. This study evaluates the strength, safety, and efficiency of different water tank configurations using Computer-Aided Engineering (CAE) with SolidWorks software. Three design variations and two material types were analyzed. The simulations yielded a Von Mises stress of 36.232 MPa, displacement of 2.851 mm, a safety factor of 5.9, and a total tank weight of 60.896 kg. Among the tested configurations, Design Model 3 demonstrated the best overall performance, offering optimal strength, safety, and material efficiency.
RANCANG BANGUN TUNGKU PADA ALAT INSINERATOR Alma Fadlillah; Sigit Mujiarto; Suyitno
ELEMEN : JURNAL TEKNIK MESIN Vol. 13 No. 1 (2026)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v13i1.370

Abstract

The accumulation of waste has become a serious issue in Indonesia due to limited landfill space and the lack of an effective waste management system. One alternative solution is the use of an incinerator as an environmentally friendly waste-burning device. This study aims to design and construct the combustion chamber of an incinerator and to test its effectiveness on three types of organic waste variations: dry, wet, and mixed. The method used is a design and build approach, which includes designing with AutoCAD and SketchUp, constructing the physical structure, and conducting combustion tests. The results show that the chamber can accommodate 2–3 kg of waste per batch and can reach a maximum temperature of up to 110°C. The fastest burning time was achieved with dry waste at 16 minutes and 21 seconds, with a combustion rate of 1.95 grams/second. This incinerator, with its simple design and low cost, is effective in reducing waste volume and produces ash that can be used as fertilizer. It is hoped that this incinerator can be widely adopted by communities to help address the waste problem.

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