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Piston: Jurnal Teknologi
Published by Universitas Halu Oleo
ISSN : -     EISSN : 25027018     DOI : https://doi.org/10.55679/pistonjt
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics
Jurnal PISTON-JT merupakan jurnal single blind peer review multidisiplin keteknikan dan natural sains yang diterbitkan oleh Jurusan D-3 Teknik Mesin, Program Pendidikan Vokasi Universitas Halu Oleo, Kendari, INDONESIA. Jurnal ini terbit dalam 2 (dua) terbitan dalam setahun yakni pada bulan Juni, dan Desember. Setiap terbitan dapat memuat minimal 5 artikel. Artikel dapat ditulis menggunakan Bahasa Indonesia atau Bahasa Inggris. Jurnal PISTON-JT memuat naskah ilmiah tentang hasil penelitian, hasil rancang bangun atau desain,hasil aplikasi, dan telaah pustaka yang terkait dengan ilmu keteknikan, natural sains, dan aplikasi industri.Setiap artikel yang masuk mengalami pemeriksaan plagiarisme menggunakan perangkat lunak yang handal. Similaritas naskah maksimal 25% tidak termasuk informasi penulis dan daftar pustaka. Jurnal PISTON-JT dapat menjadi referensi keilmuan di bidang natural sains, khususnya mesin-mesin dan industri untuk para peneliti, praktisi dan mahasiswa khususnya bidang Pendidikan Vokasi keteknikan.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 71 Documents
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Optimasi Parametrik Minyak Pirolisis dan Karbon Sisa Hasil Pirolisis Ban Bekas dalam Reaktor Atmosfer Inert. Mangalla, Lukas Kano; Lolok, Agustinus; Samhuddin, Samhuddin; Barata, La Ode Ahmad
Piston: Jurnal Teknologi Vol 10 No 2 (2025): Desember 2025
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v10i2.129

Abstract

Waste tires represent a significant environmental challenge that requires sustainable solutions through conversion into energy. One of the waste treatment technologies involves a pyrolysis process that converts solid waste into liquid fuels and solid material for backfill. This study aims to optimize the process parameters for the pyrolysis of waste tires in an inert atmosphere reactor to maximize the yield and quality of liquid and solid products. Experiments were conducted by varying temperature (400, 450, 500°C) and residence time (10, 15, 20 minutes) using controlled cubic-shaped tire samples. The results indicate that the optimal operating conditions were achieved at 450°C and 15 minutes, producing a pyrolysis oil yield of 48.3% with a high calorific value of 44.6 MJ/kg, along with a solid char yield of 35.2%. he produced solid char has potential applications as a filler material in civil construction materials. Further analysis revealed significant energy conversion efficiency of the process. These findings provide a strong technical foundation for developing commercial-scale pyrolysis technology that effectively manages tire waste while producing quality alternative fuels
Rancang Bangun Mesin Pemotong Rumput Berbasis Sistem Kontrol Mazwan Mazwan; Ari Kurniawan; Ahmad Fauzi Pohan; Kholis Gunawan
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.132

Abstract

Manual grass cutting still requires considerable labor and has a low level of efficiency. Therefore, a device is needed to improve the effectiveness and efficiency of the grass-cutting process. This study aims to design and test a grass-cutting machine based on a control system equipped with a blade drive mechanism and a track-based mobility system. The research method included mechanical design, system assembly, and performance testing of the device. Testing was carried out on several main components, namely the blade drive mechanism, the track tensioning system, and the safety of the track shoe under various terrain conditions. The test results showed that the blade drive mechanism worked properly, in which the blade could rotate optimally when the linear actuator piston stroke reached 60 mm. The testing of the track tensioning system indicated that a tensioning distance of 6 cm was the most stable condition, as the track did not detach from the sprocket during operation. In addition, testing of the track shoe on flat and inclined roads over a distance of 15 meters showed that the system was able to provide good movement stability and traction without causing damage to the track components. Overall, the designed grass-cutting machine was able to operate stably and has the potential to be used under various terrain conditions in the grass-cutting process.
Pengujian Mekanik (Kekerasan dan Impact) Logam Ferro Valve Plat Double Dampers yang Digunakan Sebagai Penyaring Abu Boiler Herry Darmadi; Arie Erza Erlangga Zebua; Nurul Shadrina Bintang; Agustin Nurya Savitri; Sorta Lumbantoruan
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.134

Abstract

Double damper also known as a double flap damper, is a special control device used in the ash transfer system of a boiler before it enters the multi-cyclone. Mechanical testing (hardness and impact) is the most effective test for obtaining an overview of the mechanical properties of a material. Although hardness testing is only performed at a single point, or a specific area, the hardness value is quite valid in indicating the strength of a material. By conducting a hardness test, a material is easily classified as ductile or brittle. Impact testing is a test that uses rapid loading. In mechanical testing, there are differences in the type of load given to the material. Tensile testing, compression testing, and torsion testing are tests that use static loads. Meanwhile, impact testing uses dynamic loads. In rapid loading, also known as impact loading, a large energy absorption process occurs from the kinetic energy of a load that impacts the specimen. This energy absorption process will be converted into various responses in the material such as plastic deformation, isterisis effects, friction, and inertia effects. The purpose of this study is to determine the hardness value of the Double Dampers Valve Plate and to determine the strength of the Double Dampers Valve Plate through the impact test method. The test results obtained the hardness value of test material 1 (0°C) = 111.3 HRC, test material 2 (25°C) = 108.033 HRC, and test material 3 (100°C) = 103.9 HRC. In the impact test, the results of the impact strength analysis of test material 1 (0oC) = 0.215 Kg.m/mm2, test material 2 (25°C) =0.235 Kg.m/mm2, and test material 3 (100°C)= 0.255 Kg.m/mm2.
Rancang Bangun Mesin Pencetak Briket Arang sekam Padi Dengan Sistem Screw Press Samhuddin; Waode Nirwana Sari Halidun; Muh. Erdiansyah; Aldi Perdana
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.135

Abstract

Penelitian ini bertujuan untuk merancang dan membangun mesin pencetak briket arang sekam padi dengan sistem screw press sebagai solusi pemanfaatan limbah sekam padi menjadi energi alternatif yang ramah lingkungan. Sekam padi merupakan limbah pertanian yang melimpah namun belum dimanfaatkan secara optimal. Melalui inovasi mesin pencetak ini, proses produksi briket diharapkan menjadi lebih efisien, ekonomis, dan praktis dibandingkan metode manual. Mesin ini dirancang menggunakan motor listrik berdaya 1 HP dengan putaran 1400 RPM serta gearbox tipe WPA 60 dengan rasio 1:50 untuk menghasilkan torsi tinggi dan kecepatan putar rendah pada sistem screw press. Hasil pengujian dilakukan dengan dua variasi berat bahan, yaitu 1000gram dan 1500gram. Berdasarkan hasil uji, diperoleh produktivitas mesin sebesar 2,18 gram/detik pada bahan 1000 gram dan 1,96 gram/detik pada bahan 1500 gram. Efisiensi alat masing-masing sebesar 37% dan 56%, dengan kapasitas produksi mencapai 7,5–8,52 kg/jam. Dari hasil tersebut dapat disimpulkan bahwa mesin pencetak briket arang sekam padi dengan sistem screw press mampu bekerja secara efektif pada skala kecil hingga menengah. Mesin ini menghasilkan briket dengan bentuk padat dan seragam, serta dapat menjadi alternatif teknologi tepat guna bagi masyarakat, khususnya dalam pengolah limbah pertanian menjadi sumber energi terbarukan
Studi eksperimen prestasi termoelektrik sebagai pemanen energi listrik mikro: efek gradien temperatur sisi dan konfigurasi modul La Ode Ahmad Barata
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.136

Abstract

Penelitian ini bertujuan untuk menganalisis kinerja termoelektrik sebagai sistem pemanen energi listrik mikro melalui pengujian terhadap efek gradien temperatur pada sisi modul termoelektrik (TEM). Prinsip dasar kerja generator temoelektrik (TEG) mengacu pada efek Seebeck, di mana perbedaan suhu antara dua sisi modul menghasilkan perbedaan potensial listrik. Studi eksperimen ini dilakukan menggunakan satu dan dua modul TEG dalam konfigurasi seri dan paralel dengan variasi kapasitas sumber panas sebesar 150 W dan 300 W. Sistem pendinginan heat pipe (HP) juga digunakan untuk meningkatkan pembuangan panas pada sisi dingin modul. Pengambilan data dilakukan secara otomatis menggunakan sistem akuisisi data (DAQmx) dan perangkat lunak LABView v.8.5 dengan durasi pengujian 120 menit. Hasil penelitian menunjukkan bahwa peningkatan gradien temperatur (ΔT) berbanding lurus dengan tegangan keluaran dan daya listrik yang dihasilkan. Penggunaan heat pipe terbukti signifikan dalam memperbesar ΔT, meningkatkan disipasi panas, serta mencegah saturasi termal pada cold junction modul. Daya output maksimum pada konfigurasi tunggal dengan HP mencapai 1,2 W pada suhu operasi tinggi, sementara konfigurasi ganda seri mencapai hingga 14 W dengan efisiensi konversi energi sekitar 10%, jauh lebih tinggi dibandingkan konfigurasi paralel. Efisiensi tertinggi dicapai pada konfigurasi seri dengan suplai panas 300 W karena akumulasi efek tegangan antar modul yang menghasilkan kesesuaian antara resistansi internal dan eksternal sistem. Hasil ini menegaskan bahwa kombinasi gradien temperatur tinggi dan sistem pendingin efektif memegang peranan penting dalam mengoptimalkan kinerja TEG.
Studi numerik aliran melalui struktur persegi dengan model turbulent Large Eddy Simulation (LES) Mohamad Abdirizal Bahmid; La Ode Ahmad Barata; Budiman Sudia
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.137

Abstract

Perilaku aliran fluida yang melewati struktur berpotensi menimbulkan dampak buruk seperti memicu kebisingan, getaran, dan stabilitas struktur. Karenanya, analisis karakteristik alirannya menjadi penting dalam bidang rekayasa aerodinamika. Penelitian ini membahas studi numerik karakteristik aliran fluida yang melewati struktur persegi menggunakan metode Computational Fluid Dynamics (CFD) dengan model turbulen Large Eddy Simulation (LES). Simulasi dilakukan menggunakan ANSYS Fluent 17.2 dengan variasi sudut serang aliran α = 0° dan α = -30° pada bilangan Reynolds 10⁴. Analisis difokuskan pada distribusi kecepatan, tekanan, tegangan aliran, vortisitas, serta parameter aerodinamis berupa koefisien drag (CD), koefisien tekanan dasar (-CPb), dan bilangan Strouhal (St). Hasil simulasi menunjukkan bahwa perubahan sudut serang mempengaruhi karakteristik aliran secara signifikan. Pada α = 0°, pola aliran bersifat simetris dengan pembentukan vortex shedding yang stabil di daerah wake. Sedangkan pada α = -30°, medan aliran menjadi asimetris akibat pergeseran titik stagnasi dan separasi aliran yang menyebabkan peningkatan turbulensi dan pelebaran wake. Nilai koefisien drag meningkat dari 2.05 menjadi 2.34, sedangkan bilangan Strouhal menurun dari 0.128 menjadi 0.115. Distribusi tekanan dan tegangan menunjukkan peningkatan efek hisapan pada sisi hilir struktur yang berdampak pada kenaikan gaya hambat dan gaya angkat. Hasil validasi menunjukkan kesesuaian yang baik dengan penelitian numerik dan eksperimen sebelumnya. Dengan demikian, model LES mampu memberikan prediksi karakteristik aliran turbulen secara akurat pada struktur bluff body berbentuk persegi.
Rancang Bangun Kompresor Mini Kapasitas 3 kg sebagai Penggerak Air Impact Wrench untuk Aplikasi di Bengkel Otomotif Aminur; Sudarsono; Budiman Sudia; Raden Rinova Sisworo; Samhuddin
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.133

Abstract

The use of pneumatic tools such as air impact wrenches in the workshop industry requires a stable and adequate supply of compressed air. However, conventional compressors on the market often have large dimensions, making them less flexible for portable needs. This study aims to design and build a mini compressor system capable of supplying the air pressure needed for the operation of an air impact wrench. The research method includes the system design stage, selecting the drive components (electric motors), calculating the dimensions of the air storage tank, and testing the system's performance. The parameters tested include the tank filling time to reach maximum working pressure, and pressure stability when the pneumatic tool is used. The results showed that the tank filling time is 10 minutes to reach a maximum working pressure of 95 Psi and the pneumatic tool pressure stability is 65 Psi within 3 minutes at a volume of 0.54 CFM. For heavier continuous use of the air impact wrench, a refill interval is required considering the limited pressure stability duration of 3 minutes..
Pengembangan Sistem Monitoring Heat Index dan UV Index Berbasis IoT Menggunakan ESP8266 di Kabupaten Sikka Isma Alip; Zakaria Al Farizi; Nurfadilah
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.139

Abstract

This study developed an Internet of Things (IoT)-based heat indeks and UV Index monitoring system using ESP8266 in Sikka Regency, East Nusa Tenggara, which has high levels of ultraviolet radiation and environmental temperature. The study aimed to monitor temperature, humidity, UV intensity, and heat index in real time through the ThingSpeak platform. The research method used the System Development Life Cycle (SDLC) approach, which includes planning, requirements analysis, design, implementation, testing, and system evaluation stages. Data collection was conducted at the Sikka Meteorological Agency from 07:00 to 19:00 WITA. The results showed that the system had good accuracy with a temperature regression value of R² = 0.9945 and humidity regression value of R² = 0.8286, as well as an average heat index difference of 0.4 °C compared to reference data. The developed system is considered feasible for environmental monitoring and mitigation of health risks caused by heat exposure and ultraviolet radiation. Future research can be improved by adding more accurate sensors and integrating automatic notification features based on applications.
Evaluation of Net Energy Gain Solar Tracker Single-Axis based on Relay of 50 Wp Solar Panel Afdal Syarif; La Baride; Haryani Haryani; La Atina
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.140

Abstract

The performance of photovoltaic panels is affected by the apparent movement of the sun, which causes the angle of solar radiation incidence on the panel surface to change throughout the day. One method to increase solar radiation capture is the implementation of a solar tracking system. However, most previous studies have focused only on improvements in power output and energy production without considering the energy consumption of the tracking mechanism. This study aims to evaluate the performance of a relay-based single-axis solar tracker applied to a 50 Wp photovoltaic panel by analyzing power enhancement, energy production, and net energy gain. The experiment was conducted in Lamangga Village, Baubau City, Southeast Sulawesi, Indonesia, for five consecutive days from 6 to 10 August 2023 between 09:00 and 16:00 WITA. The evaluated parameters included output power, daily electrical energy, actuator energy consumption, energy improvement, and net energy gain. The results showed that the average output power of the fixed photovoltaic panel was 17.71 W, while the solar tracker system achieved an average power output of 22.45 W, representing an increase of 26.92%. The average daily energy generated by the fixed panel was 134.68 Wh, whereas the solar tracker produced 170.64 Wh per day. The actuator consumed 15.30 Wh per day during tracking operation. After accounting for actuator energy consumption, the system still achieved a net energy gain of 20.66 Wh per day, equivalent to 15.34%. These findings indicate that the relay-based single-axis solar tracker effectively improves solar energy utilization through a simple control system and relatively low implementation cost. Future studies are recommended to employ longer observation periods and direct solar irradiance measurements to provide a more comprehensive evaluation of system performance. Keywords: solar tracker, mechanical relay, photovoltaic panel, net energy gain, solar energy.
Optimalisasi Alat Press Hidrolik Untuk Fabrikasi Material Komposit Nanang Endriatno
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.141

Abstract

production equipment capable of producing high-quality products, particularly for composite materials. This research aims to develop a hydraulic press for fabricating composite materials. This tool is designed to generate high compressive forces with minimal manual input, making it suitable for use on a laboratory scale and in small industries. The research methods include a literature review, conceptual design of the mechanism, design using Autodesk Inventor, and structural simulation using a numerical approach. The tool design consists of the following main components: a frame, a steel plate mold, a hydraulic jack mount, a jack retaining frame, springs, spring bolts, a hydraulic jack, a press, a mold cover, and mold retaining bolts. All components have been modeled in three dimensions (3D) and two dimensions (2D) using Autodesk Inventor software to ensure dimensional accuracy and ease of assembly. The simulation results indicate that the maximum stress in the frame remains below the material's yield point. The deformations were relatively small and did not significantly affect the tool's performance. Furthermore, the safety factor obtained was greater than one, indicating that the frame structure had a good level of safety, adequate rigidity, and was capable of withstanding the load during the pressing process. The designed hydraulic press can be optimally utilized for composite fabrication processes. The development focused not only on structural strength and safety but also on improving work process efficiency, ease of operation, and ease of maintenance, making this tool suitable for both laboratory and small-scale industrial applications.

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