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Piston: Journal of Technical Engineering
Published by Universitas Pamulang
ISSN : 25413511     EISSN : 26862247     DOI : http://dx.doi.org/10.32493/pjte.v5i2.19158
Core Subject : Engineering,
Aerospace Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Ansor Salim Siregar, Mulyadi Mulyadi, Syaiful Arief Analisis Kegagalan Laminasi Komposit Epoksi/Serat Karbon Pada Sayap Pesawat Tanpa Awak DOI: 10.32493/pjte.v5i2.18596 Parlindungan Pandapotan Marpaung, Herbert H. Rajagukguk Energi Mekanik Penggerak Poros Magnet Rotor Alternator untuk Pembangkit Listrik AC DOI: 10.32493/pjte.v5i2.19158
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 219 Documents
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Failure Analysis on Leaked Tube of Furnace Boiler Sukandar; Triwibowo; Aswandi
Piston: Journal of Technical Engineering Vol. 8 No. 1 (2024)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i1.41088

Abstract

Furnace in oil companies is functioned to heat raw oil in process to produce various fuels, and outlet gas from the furnace is used for heating water in Furnace Boiler. Failure took place on tubes of Furnace Boiler. The purpose of this failure analysis is to find the root cause of failure. Methods conducted in this failure analysis are through examination and testing of fractography, metallography, chemical composition, hardness, and bulging measurement. Examination on the fracture surface by fractographic method revealed leakage due to excessive bulging and existence of excessive deposit/scale. Condition of bulging gave indication of long-term overheating due to excessive deposit/scale. Examination by metallographic method revealed that microstructure of ferrite and pearlite having grain growth due to exposed by local heating. However, result of chemical composition examination and hardness test showed that material of the furnace tubes were in accordance with ASTM A-192. Bulging measurement gave indication of excessive bulging up to 15% for the leaked tube. Therefore, failure of leaked tube of Furnace Boiler was caused by long-term overheating due to excessive deposit/scale which were formed in the location of bulging.
Optimalisasi Aliran Udara Pada Gedung Assembly Line 2 PT Astra Daihatsu Motor dengan Metode Computational Fluid Dynamic Saputro, Sahid Alvin; Wibowo, Setyawan Bekti; Andriansyah, Deva
Piston: Journal of Technical Engineering Vol. 8 No. 1 (2024)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i1.41114

Abstract

Lingkungan kerja yang nyaman dan aman menjadi fokus perusahaan untuk meningkatkan produktivitas dan meningkatkan kenyamanan karyawan. Salah satu tantangan yang dihadapi adalah temperatur tinggi mencapai rata-rata 33,435°C dengan kecepatan udara rata-rata 0,833m/s di Gedung Departemen Assembly Line 2 PT Astra Daihatsu Motor. Hal ini disebabkan oleh aliran udara yang tidak merata dan kurangnya sistem pendinginan. Penelitian ini bertujuan untuk mengatasi masalah tersebut dengan mengoptimalkan aliran udara menggunakan metode simulasi Computational Fluid Dynamics (CFD). Simulasi dilakukan dengan merancang beberapa alternatif layout dan penambahan big fan untuk mendapatkan solusi yang paling efektif dan optimal. Hasil optimalisasi menunjukan bahwa perubahan layout dan penambahan big fan terbukti mempengaruhi distribusi udara di dalam ruang produksi menjadi lebih merata serta menurunkan temperatur. Hasil penurunan temperatur menjadi rata-rata 32,659°C dan peningkatan kecepatan udara rata-rata 1,614 m/s.
Mechanical Properties of ST 37 Manufactured by Gas Tungsten Arc Welding using Cannibal Consumable Manufacturing Filler Saragih, Albert Daniel; Riswanda; Prasetyo; Nugraha, Syahrul Dwi; Al-Qashtalani, Tb. Moch Mario
Piston: Journal of Technical Engineering Vol. 9 No. 1 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v9i1.41558

Abstract

In this paper, the macrostructure and mechanical properties of medium carbon steel with cannibal consumable filler by using the GTAW process have been investigated. The medium carbon steel (ST 37) plates with dimensions of 300 × 250 ×3 mm were used for welding and 2.5 mm of thickness for the filler. For welding parameters, current of 80 A was chosen and observed over the welded specimen. Welding was performed with single Vgroove butt Joint design, 30° bevel angle. Preparation of samples was done according to standard. To explore the optimum welding specimen, both tensile and bending tests were carried out. The result of the welding process with the current of 80A shows that the face part tends to be more embossed and the root part looks less embossed, there are parts that lack penetration. This causes a lack of weld strength due to incomplete penetration of the root part. The face section produces maximum and strong results, while at the root there are cracks that are almost broken. This is due to lack of fusion because the current is too small resulting in differences in weld strength between the face and root, which affects the bending test results. In the tensile test results, a fracture occurred in the weld metal in the form of a brittle fracture. This is caused by a lack of fusion and very minimal penetration of the filler metal into the weld groove. Based on the macro test analysis carried out, minimal root penetration or no penetration occurs, while the weld seam accumulates on the face. Based upon the present study it is not recommended that 80 A of welding current when GTAW process using canibal consumable filler. The current of 80A may need to improve to produce good welding.
Annealing Effect on Improving the Mechanical Properties of Zirconium Based Biomaterials with the Addition of Yttrium Elements for Bone Plate Application Awwaluddin, Muhammad; Prajitno, Djoko Hadi; Soemardi, Tresna P.; Hastuty, Sri
Piston: Journal of Technical Engineering Vol. 8 No. 1 (2024)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i1.43200

Abstract

To improve the mechanical properties of biomaterials with zirconium-based alloys, especially on ductility, an annealing process was carried out. The process was carried out at a temperature of 800 oC and holding time for 3 hours in a vacuum chamber which was flowed by high purity argon gas. The composition of the alloy used in this study was Zr6Mo4TixY (x= 0, 1 and 3 %wt). Microstructure observations were carried out using microscope optic and Scanning Electron Microscopy (SEM) and mechanical properties observation using tensile testing. In this study, micro-sized specimens were used and followed the ASTM E8-04 standard with a surface roughness of 1µm. The results showed an increase in the tensile strength value after annealing process and decrease the modulus elasticity. In addition, the grain boundaries of the alloy are getting smaller, this shows the effect of annealing on changes in the properties of the material.
Sistem Pengendalian dan Pemantauan Terpusat pada Perangkat IoT Terdistribusi Sinambela, Eka Stephani; Simatupang, Frengki; Wowiling, Gerry Italiano; Sigiro, Marojahan Mula Timbul; Manalu, Istas Pratomo; Silalahi, Sari Muthia; Siagian, Pandapotan
Piston: Journal of Technical Engineering Vol. 8 No. 1 (2024)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i1.48473

Abstract

Perkembangan pesat Internet of Things (IoT) telah memungkinkan berbagai aplikasi cerdas; namun, pengelolaan banyak perangkat IoT yang tersebar secara manual masih kurang efisien dan memakan waktu. Penelitian ini bertujuan untuk mengembangkan sistem pemantauan dan pengendalian terpusat untuk perangkat IoT yang tersebar dengan menggunakan arsitektur master-agent. Master berfungsi sebagai pusat kendali yang mengumpulkan data dari berbagai agent serta memungkinkan manajemen terpusat melalui API Gateway yang memfasilitasi komunikasi dan kontrol perangkat. Prototipe yang dikembangkan terdiri dari dua mode kontrol: kontrol manual untuk menyalakan dan mematikan lampu melalui antarmuka berbasis web, serta kontrol otomatis untuk pemantauan lingkungan menggunakan berbagai sensor. Hasil pengujian menunjukkan bahwa sistem ini mampu mengelola perangkat IoT secara real-time dengan efektif. Pengujian kontrol manual berhasil mengaktifkan dan menonaktifkan lampu secara jarak jauh. Pengujian kontrol otomatis untuk pemantauan tanaman mencatat suhu lingkungan stabil antara 44–46°C, kelembaban tanah pada 27%, variasi jarak sensor ultrasonik antara 2–15 cm, serta fluktuasi intensitas cahaya antara 29–120 Cd. Hasil ini membuktikan bahwa sistem dapat merespons perubahan lingkungan secara dinamis, seperti mengaktifkan pompa air saat kelembaban tanah rendah atau menyesuaikan pencahayaan berdasarkan data real-time. Dengan menerapkan arsitektur RESTful API dan komunikasi berbasis JSON, sistem ini menawarkan skalabilitas tinggi dan fleksibilitas dalam pengembangan jaringan IoT. Penelitian ini menyimpulkan bahwa sistem pengendalian dan pemantauan IoT secara terpusat meningkatkan efisiensi, fleksibilitas, serta kemudahan dalam pengelolaan perangkat, sehingga dapat diterapkan dalam berbagai bidang seperti smart home, pertanian cerdas, dan otomatisasi industri.
The Effect of Chloride Ions for Corrosion Resistance of C276 Material in NaCl Solution Priyotomo, Gadang; Anam, Ahsonul
Piston: Journal of Technical Engineering Vol. 8 No. 1 (2024)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i1.48481

Abstract

Hastealloy-C276 is an austenitic nickel-molybdenum-chromium alloy with small amounts of tungsten added. This material is quite familiar and is used in various industrial components. However, this alloy, like other types, is very susceptible to corrosion due to the influence of chloride ions in solution. The corrosion resistance of steel alloy materials was investigated using electrochemical methods including open circuit potential (OCP), Anodic Potentiodyamic (AP) with and Tafel in NaCl solution media. The test parameters carried out were chloride concentration (0.001 M-1M) and pH (2, 7 and 10) values. The test results show that an increase in chloride ion concentration causes a decrease in the OCP value in a negative direction, which indicates a tendency for decreasing of the corrosion resistance for C276. The AP test results show that the pitting potential (Epit) value slowly decreases as the chloride ion concentration increases up to 1 M. On the other hand, the role of pH is very important in changing the corrosion resistance performance. A decrease in pH to 2 causes an increase in the corrosion rate of the material, whereas an increase in pH causes this decrease.
Design and Construction of a Satay Grill Based on Thermoelectric Generator as a Source of Electrical Energy Nulhakim, Lukman; Syafrizal; Tauvana, Ade Irvan; Widodo; Nurhidayatuloh, Farhan
Piston: Journal of Technical Engineering Vol. 8 No. 2 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i2.48616

Abstract

Thermoelectric Generator is a technology used to generate electrical energy by utilizing the Seebeck effect, which occurs due to the temperature difference between the hot and cold sides. This study aims to determine the voltage generated by the thermoelectric generator from the process of burning satay using coconut shell charcoal. In this experiment, 6 pieces of thermoelectric generator type TEG1-241-1. 4-1. 2 were used which were connected in series. The pieces were mounted on aluminum material measuring 165 x 110 x 15 mm, and equipped with a heatsink at the bottom of the satay grill body for cooling. The heatsink used is an extrude model. Testing began when the charcoal had reached a red color. The maximum voltage generated reached 2,25 V in seven minutes, with a temperature difference reaching 5,9 °C. The temperature on the hot side was recorded at 102,2 °C, while on the cold side it was 96,3 °C.
Analysis of the Effect of Adding a Water Heater to the R290 Split Air Conditioning Instead of R22 Widodo; Nulhakim, Lukman; Syafrizal; Tauvana, Ade Irvan; Kurnia, Deva Arya; Asmoro, Purwandito Tulus
Piston: Journal of Technical Engineering Vol. 8 No. 2 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i2.48846

Abstract

The heat generated by split air conditioning (AC-Split) is sufficiently high to be utilized as a heat exchanger. The installation of a heat exchanger device, referred to as an Air Conditioning Water Heater (ACWH), is used to heat water in a tank by utilizing the waste heat from the condenser. In this study, refrigerant R290 will be used as a replacement for R22, with the aim of eliminating the Ozone Depleting Potential (ODP) and Global Warming Potential (GWP) associated with R22. Calculations are carried out to ensure the performance of the split AC by testing each refrigerant, R22 and R290, installed in the heat exchanger system. The test data is calculated and analyzed based on the performance on the vapor compression diagram. The results of the performance calculations of each R290/R22 refrigerant COP: 9.7/6.4, compression work: 28.7/25.72 kJ/kg, cooling effect, and electrical power: 881/976 Watts. The calculation results of R290 have better performance compared to R22, especially in electrical power. R290 is 10% lower than R22, COP is 34% higher, and it is ODP and GWP-free.
The Influence of Chloride Ion Concentration and Short Immersion Time on the Corrosion Behavior of C11000 Copper Alloy Priyotomo, Gadang; Anam, Ahsonul; Maldini, Noviar Rizky
Piston: Journal of Technical Engineering Vol. 8 No. 2 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i2.48881

Abstract

The effect of various chloride ion concentration (0 %, 1 %, 2 %, 3%, 4% and 5 % NaCl solution) on the corrosion behavior of the C1100 copper alloy was investigated with the immersion test (weight loss method). The effect of various immersion periods was also examined up to 14 days. After conducting immersion test, metal surfaces were observed with an optical microscope and the SEM analysis. The product of corroded copper was characterized using Energy Dispersive Analysis of X-rays (EDAX). On the basis of results, the magnitude of corrosion rate is higher in increasing the chloride concentration and immersion period, respectively. The increase of chloride concentration causes the copper oxide layer to become porous and cracked compared to without chloride addition. The reduction in the integrity of the copper protective layer took place due the presence of chloride ion.
Characteristics of Half Wave and Full Wave Power Supply Based on Proteus Application Simulation Sunardi
Piston: Journal of Technical Engineering Vol. 8 No. 2 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i2.48903

Abstract

This study uses a simulation-based approach with the Proteus application to discuss the characteristics of half-wave and full-wave power supplies. Power supplies are essential components in electronic systems that convert AC voltage into DC voltage. In this study, the design and simulation of half-wave and full-wave rectifier circuits were carried out to observe the differences in performance and characteristics of each type, such as DC output voltage value, ripple, and rectification efficiency. The simulation results show that the full-wave power supply produces a more stable DC output voltage with lower ripple compared to the half-wave power supply. Additionally, the rectification efficiency in full-wave circuits is higher because rectification occurs in every AC cycle, while in half-wave circuits it only occurs in half of the cycle. This simulation provides a clear overview of the advantages and disadvantages of each type of power supply, thus serving as a useful reference in the design of power supply systems for various electronic applications.

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