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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 60 Documents
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Analisa Numerik Perilaku Aliran yang Melalui Struktur Persegi La Ode Ahmad Barata; Lukas Kano Mangalla; Amrullah
Piston: Jurnal Teknologi Vol 8 No 2 (2023): Desember 2023
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v8i2.53

Abstract

This study is designed to analyze the flow characteristics aver a square body with variations in the angle of attack of the flow. The force components u, CD, -CPb, CL and St are analyzed numerically. The method used in this research is the Large Eddy Simulation (LES) turbulent model with variations in the angle of incidence of fluid flow on a square test geometry model with cross-section height H = 40 mm (D = H). The results showed that the large angle of incidence of the flow increased the value of CD, CL due to the enlargement of the flow in the downstream wake area. While the CP value also decreased due to the negative pressure gradient of the downstream area enlarged with an increase in the value of the angle of attack of the flow. The angle of attack increases the parameters CDmax = 2.33, CP = -1.87, and St = 0.09 at an angle of -30° while at an angle of 0° the value of CD = 2.05 -CPb = -1.37, St = 0.128. Changes in the angle of incidence of the flow affect the frequency of vortices. The local velocity component (u) decreased.
Ekstraksi Serat Alam Untuk Aplikasi Material Komposit Dengan Mesin Dekortikator Nanang Endriatno; La Ode Ahmad Barata
Piston: Jurnal Teknologi Vol 9 No 1 (2024): Juni 2024
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v9i1.54

Abstract

Natural fibers have advantages compared to synthetic fibers because they are biodegradable and sustainable. The problem with natural fibers is the extraction or separation process of the skin and fiber. This research aims to design a decorticator that separates leather and natural fibers to be used as composite reinforcing materials. The procedure for creating a decorticator machine is carried out by collecting initial data and requirements about the decorticator machine, determining effective decorticator machine technology and mechanisms, designing concepts and mechanisms, and planning detailed drawings. From this research, a decorticator design was created with a frame component that functions as the primary support for the machine components; the beater shaft functions to scrape the stem by moving quickly and breaks the outer layer of the stem so that the fibers can be separated, the rolling cylinder functions to hold the fiber during the process of separating the fiber and stem, the machine cover functions to provide safety during operation, the petrol motor as the driving force, and the pulley-belt transmission system. Apart from separating fiber from non-fiber parts, decorticator machines can also increase the use of environmentally friendly natural fibers as composite materials and reduce dependence on synthetic materials.
Perancangan Mesin Pencacah Rumput Pakan Ternak Menggunakan Sistem Penggerak Motor Listrik Sofian Efendi; Mijer; Aditia Warman; Sarlan; Budiman Sudia
Piston: Jurnal Teknologi Vol 9 No 1 (2024): Juni 2024
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v9i1.55

Abstract

The aim of this final assignment is to design an animal feed grass chopper machine using an electric motor drive system and to determine the production capabilities (on machine activity) of the grass chopper. This machine is a multi-purpose machine as a forage designer, especially used to design animal feed grass. In making this final assignment, the author chose the title of designing an animal feed chopping machine using an electric motor system to save time. Seeing that there are still many people who currently chop animal feed using manual tools and this will require a fairly long process, of course, having an animal feed chopper machine that uses an electric motor can shorten the time in the process of chopping animal feed. Therefore, the creation of this final assignment can make work easier and can save time so that workers can complete it more quickly. The initial process for operating an animal feed chopper is to connect the dynamo cable to an electric current, then take the elephant grass and then insert it into the inlet of the grass chopper. This tool is capable of producing grass chopping of 0.94 grams/1 minute 42 seconds. The driving source of this tool uses a 1/2 HP DC electric motor with a rotation of 2800 rpm. The conclusion of this final project is how to design an animal feed grass chopper consisting of a frame, a dynamo with 220 Volt power and a battery current of 3.54 A. The application used to design this tool is sketchup, the tools and materials used include grinding, meter, welding transformer, welding glasses, electric drill, angle rule, hammer, L profile iron, plate iron and bolts. Test results of the tool and working voltage of 220 Volts, maximum speed of 2800 rpm, chopping results of 0.94 grams/1 minute 42 seconds of operation using a cable from a dynamo to electric current and a 220 Volt power source. Our suggestion is to develop this tool in terms of the transmission system, the engine output rotation is still very large, making the grass chopped results very small. So we need a machine speed control device (variable speed) so that the chopping can be adjusted according to the required speed.
Sistem Perawatan Water Treatment Plant (WTP) PLTU Nii Tanasa 3 x 10 MW La Ode Ahmad Barata
Piston: Jurnal Teknologi Vol 9 No 1 (2024): Juni 2024
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v9i1.56

Abstract

The power plant (PLTU Nii Tanasa) is located in Nii Tanasa Village, Soropia District, Konawe Regency, Kendari - Southeast Sulawesi. This 17.64 ha PLTU consists of 2 units, each producing 10 MW of electricity. The steam power plant system requires a water treatment system to change the water content from sea water to demin water or fresh water (WTP). Water treatment systems in the steam power plants are important to ensure efficient and sustainable operation. The water used in the steam cycle must be of high quality to prevent damage to boilers, turbines, and other components. The stages of water treatment include: Pretreatment, Demineralization, Degasification, Chemical Dosing, blowdown, condensate polishing, cooling water treatment. In the Water Treatment Plant process, the water conductivity is reduced to < 1 μs, this is done so that the electrical conductivity contained in the water is very small so as to minimize the potential for corrosion, and other oxidation processes. In addition to pH, the other parameters of boiler fill water are TDS, and water pH. The types of maintenance observed in this activity are preventive maintenance, and corrective maintenance. Preventive maintenance includes Sea water pump components, multimedia filters, active carbon filters, micron filters, HP pumps, SWRO. The corrective maintainaice in this observation includes micron filter equipment, SWRO, BWRO. The component maintenance process of the WTP has a direct effect on water quality so that it is related to the performance of the Pwer plant for both in terms of thermal performance and economical aspects.
Uji Eksperimental Aliran Dalam Pipa dengan Variasi Rangkaian Pompa Sentrifugal Amrullah; Akbar Naro Parawangsa; La Ode Ahmad Barata
Piston: Jurnal Teknologi Vol 9 No 1 (2024): Juni 2024
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v9i1.57

Abstract

A pump converts the rotational energy of the shaft and subsequently the movement of the blades into kinetic energy and pressure in the fluid. Pumps can be configured as single, double series, or double parallel, depending on the requirements. This research aims to determine the best performance of a centrifugal pump installation with variations in head and configuration. The method used in this research is experimental, utilizing a centrifugal pump arranged with water as the fluid. The results show that single and double series configurations are more suitable for applications requiring stable flow despite changes in head. Parallel configurations produce higher speeds compared to single and double series configurations, but speed decreases with increasing head. The single pump's efficiency increases to 40.5% with an increase in head. Efficiency in the series configuration increases to 50.1%, higher than the single pump at the same head. Efficiency in the double parallel configuration increases to 80.1%, indicating that the parallel pump is the most efficient at higher heads. For applications requiring high efficiency, the double parallel pump configuration is the best choice. Based on the analysis results, it can be concluded that the double parallel pump configuration provides the best performance with the highest efficiency at 80.1%, and the highest discharge rate of 43.2 l/min. The double parallel pump configuration is the most efficient and effective for applications requiring optimal pump performance at higher heads.
Optimasi Penggunaan Energi Terbarukan pada Budidaya Lele Bioflok di Pandeglang dengan HOMER Rudi Purwo Wijayanto; Ronald Akbar; Imam Arif Raharjo
Piston: Jurnal Teknologi Vol 9 No 1 (2024): Juni 2024
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v9i1.59

Abstract

The bioflock catfish farming method presents advantages in terms of enhancing feed efficiency and reducing chemical usage. However, it faces challenges in higher energy consumption compared to conventional methods. Additionally, not all farming locations are situated near residential areas and connected to the PLN grid; some are located in remote areas without PLN grid access. This study aims to assess the potential and effectiveness of renewable energy utilization using HOMER Pro for bioflock catfish farming in Pandeglang, West Java. Pandeglang has an average solar radiation intensity of 5.27 kWh/m²/day and an average wind speed of 4.99 m/s, making it suitable for the utilization of solar panels and wind turbines as renewable energy sources. A bioflock catfish farming operation with a capacity of 2 tons per cycle requires 13.14 kWh/day of energy, with a peak load of 1.74 kW. Using HOMER Pro, this study explores 11 scenarios with various generator configurations. The most optimal scenario involves the use of solar panels with a capacity of 1.58 kW combined with energy from PLN, resulting in a renewable energy utilization rate of 39.2%. The cost of energy produced in the optimal scenario is Rp 1,019.00/kWh, with an Internal Rate of Return (IRR) of 20%, a Return on Investment (ROI) of 16%, and a Break-Even Point (BEP) of 5 years. The best scenario yields a Net Present Cost (NPC) of Rp 81,100,000, which is 19% lower than the baseline scenario's NPC of Rp 100,000,000 over the 20-year project period.
Pembuatan Alat Peredam Suara Skala Praktikum Abdul Kadir; Yuspian Gunawan; Muhammat Reskiyanto; Muh.Akbar; Ul Asri; Ramadhan
Piston: Jurnal Teknologi Vol 9 No 2 (2024): Desember 2024
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v9i2.60

Abstract

Noise is the occurrence of unwanted sounds including irregular sounds and sounds emitted by transportation and industry, so that in the long term it can disturb and endanger work concentration. The purpose of making this silencer test equipment is to determine the level of sound that can be heard properly. .Methodology used: In an impedance tube, two microphones are placed at one end of the impedance tube and a sound source is placed on the other side. Two microphones were placed between them which were used to measure differences in the acoustic impedance of the sound field produced. The results of the research carried out were the creation of a sound dampening device. This research was carried out in three stages, namely the stage of making sound dampening equipment. In this study, two types of specimens were used, namely from wood powder waste and cigarette butt waste with a thickness of 1 cm with a frequency used of 500 Hz, (wood dust = 0.0164. Cigarette butts = 0.0164) 1000 Hz (wood dust = 0 .0097, cigarette butts = 0.0114) and 1500 Hz.(wood dust = 0.0107, cigarette butts = 0.0139
Desain dan Analisis Finite Elemen Rangka Gantry Crane Menggunakan Software Autodesk Inventor Profesional 2024 Al Ichlas Imran; Aminur; I Made Widana
Piston: Jurnal Teknologi Vol 9 No 2 (2024): Desember 2024
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v9i2.62

Abstract

Currently, the gantry crane still uses steel material. The steel is protected using a coating paint to minimize the impact of corrosion. However, this method is inefficient given the high rate of corrosion due to its coastal location. This also causes maintenance issues because repainting must be done regularly and periodically. Additionally, not all equipment has annual maintenance funding. The aim of this study is to design and analyze the stress of a 9-ton capacity gantry crane using Aluminium 6061 material. Finite element analysis was conducted using Autodesk Inventor Professional 2024 software. The results of this study indicate that the gantry crane frame is safe to use because the von Mises stress analysis result of 2,778 MPa is still below the yield strength of Aluminium 6061 material, which is 275 MPa. A safety factor of 2.07 shows that the gantry crane design is very safe to withstand loads up to 9 tons.
Analisis Kekuatan Rangka Mesin Pencacah Nilam dengan Menggunakan Metode Elemen Hingga Nanang Endriatno; La Ode Ahmad Barata; Salimin
Piston: Jurnal Teknologi Vol 9 No 2 (2024): Desember 2024
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v9i2.74

Abstract

Frames are often used as essential elements in the construction of machines and various other engineering products. The strength of the frame is significant in ensuring that the structure can withstand operational loads when used. Frame failure can cause severe damage, accidents, and substantial financial losses, so evaluating the strength of the frame before production is a critical step in the design process. This study aims to analyze the mechanical behavior of the components or frames of the patchouli chopping machine based on the maximum stress, displacement, and safety factor of the designed frame. The research method using finite element simulation technology is an efficient approach to analyzing the performance of frame structures. By utilizing simulations, a comprehensive evaluation of various parameters such as stress, displacement, and frame safety can be carried out. This process helps predict the structure's response to multiple loads received by the system. The simulation results using the finite element method show that the L-profile frame 40x40x3 mm with a cross-sectional area of ​​307.863 mm2 can withstand a maximum load of 1000 N with a maximum deformation of 0.2479 mm, which occurs at the load center. The von Mises stress distribution shows that the stress that occurs in the L-profile steel is 28.8 MPa. This value is far below the material yield strength threshold of 207 MPa. The maximum Safety Factor value that occurs in the frame is 15 ul, and there is no safety factor value below 1. The simulation results show that the analyzed frame is safe and meets the specified design requirements
Studi Karakteristik Biogas dari Kotoran Sapi dengan Penambahan Jerami La Ode Ahmad Barata; Jenny Delly; Samhuddin
Piston: Jurnal Teknologi Vol 9 No 2 (2024): Desember 2024
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v9i2.76

Abstract

Cow dung is one of the abundant energy resources, especially in rural areas, which has the potential to become an option in reducing people's dependence on fuel oil. This study aims to analyse the characteristics of biogas from cow dung as an alternative energy. The effect of paddy straw on the biogas production rate and flame characteristics was also analysed. The parameters studied were temperature, pressure, and detected gas on biogas production and flame characteristics. The results showed that biogas from cow dung produced a light blue biogas flame, with a pungent odour at a retention time period of 14 days. Flame characteristics with blue colour were observed on the 21st day of retention time, and the pungent odour (considered as a sulphur, and a carbon monoxide) was relatively reduced. Combustible gases were identified by the gas detector as EX; 100%. Other elements such as sulphur and carbon monoxide were indicated as H2S and CO by the gas detector. The intensity of these two elements decreased as the retention time increased up to 28 days. The addition of the straw of 10% of the cow dung increased the pressure rate and mass of biogas produced on day 7. The biogas combustion test on day 14 showed that the addition of straw reduced the intensity of methane gas, which was characterized by a pale blue flame due to the dominance of carbon monoxide. The effect of straw addition on biogas intensity was observed on day 21, in which the visual intensity of the flame was greater than the feedstock without the straw. In the retention time above 21 days, the straw biomass has been completely degraded, thus increasing the intensity of the burning gas flame. This study recommends carefully handling of straw biomass for additional feedstock and catalyst in the biogas production of cow solid manure such as shredding, ideal composition, and pre-treatment of non-degradable substances. 

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