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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 7 Documents
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Search results for , issue "Vol. 9 No. 1 (2025)" : 7 Documents clear
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.
System Circuit Analysis of Solar Panel Chicken Egg Incubator Sulanjari; Wicaksana, Ilyas Rasyid; Simbolon, Kiki Tristiawanti; Setyowati, Agustina Dyah; Rohmat, Nur; Irawan, Ade
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.v9i1.49755

Abstract

The chicken egg incubator is an innovation in the method of hatching chicken eggs that has higher efficiency and is up-to-date compared to using incubating hens. With this incubator machine, the incubation process of chicken eggs can be controlled and can reach the ideal temperature and humidity for the hatching process of chicken eggs. This research was conducted to find out how much power is used by this chicken egg incubator machine, as well as how long it takes for 300 Wp solar panels to charge a battery with a capacity of 12 V / 80 Ah. The research was conducted to find out the percentage of success of this egg hatching and to calculate how long it takes to reach the BEP (Break Even Point). This chicken egg incubator machine is powered by a 300 Wp solar panel with a 12 V / 80 Ah battery. In the incubator circuit there is a humidifier mist maker component to maintain the incubator humidity at 50%–60%. Lighting uses 2 incandescent lamps with a total power of 50 W, as well as a ventilation fan that turns on when the temperature in the incubator is excessive in order to keep the temperature at 36 ℃–38.5 ℃. The drive motor is set to move for 3 seconds every 3 hours. This chicken egg incubator has a power consumption of 74.55 W with an egg hatching success rate of 86%. This chicken egg incubator takes about 500 days or 1 year and 5 months to reach its BEP (Break Even Point).
Characteristics of Aluminium 7075 Tool Profile for HDPE and PP Welding Against Tensile and Bending Malisi, Muhammad Sibro; Darsono, Febri Budi; Kriswanto; Alkafi, Abu Faqih; Rochim, Muhammad Nur; Masruhan, Fahmi Irsad
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.v9i1.51351

Abstract

The increasing demand for lightweight materials in the automotive industry has led to the replacement of metal vehicle components with polymers such as High-Density Polyethylene (HDPE) and Polypropylene (PP) to support sustainable development and emission reduction. However, welding dissimilar polymers presents a challenge due to the limitations of conventional techniques. Friction Stir Welding (FSW) emerges as a promising solution by enabling solid-state joining below the melting point. This study investigates the effect of AA7075 tool profile variations—plain cylinder, threaded cylinder, and grooved cone—on the mechanical properties and macrostructure of HDPE-PP FSW joints. Experimental welding was performed at a rotational speed of 2920 rpm and a travel speed of 30 mm/min, with analysis including tensile tests (ASTM D638), bending tests (ASTM D790), temperature measurements, and macrostructural observations. Results show that the threaded cylindrical tool yielded the highest tensile strength (4 MPa) due to effective material flow, while the grooved cone tool produced the highest bending strength (6,8 MPa) through improved vertical and radial mixing. The plain cylindrical tool showed the weakest performance with significant welding defects. Overall, tool geometry significantly influences weld quality, and selection should be based on the mechanical requirements of the application. These findings emphasize the importance of tool design optimization to enhance joint strength and structural integrity in dissimilar thermoplastic FSW.
Design of Handoff Communication Sequence Architecture in LoRa Networks Manalu, Istas Pratomo; Simatupang, Frengki; Sinambela, Eka Stephani; Sigiro, Marojohan Mula Timbul; Wowiling, Gerry Italiano; Silalahi, Sari Muthia
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.v9i1.51408

Abstract

Technological advances have driven the development of IoT-based object tracking systems, where LoRa is an ideal wireless technology due to its long range and low power consumption. Challenges in implementing LoRaWAN, particularly its role in the handoff process between gateways that can disrupt communication, can be overcome by developing a more efficient handoff method. For this reason, this study presents the design of Handoff communication for the LoRa Network. We use two gateways and one transmitter node. The gateway node consists of a LoRa module and an ESP32, while the Transmitter consists of a LoRa module, an Arduino Nano, and a GPS sensor. The RSSI parameter is a determining factor in transferring connectivity paths from GW A or GW B, as it provides an RSSI threshold value of -100 dBm. We successfully designed handoff communication at each Node and conducted a mini-test. The test results show that LoRa can implement handoff techniques at a distance of 0-500 meters. This indicates that the node is in closer range to GW A. The RSSI value of GW1 is in the range of -52 dBm to -98 dBm, while the RSSI of GW2 is in a much weaker range, which is around -120 dBm to -100 dBm. As the distance increases, the RSSI value of GW1 shows a significant decrease, while the RSSI of GW B actually increases. At a distance of approximately 250 meters, there is an intersection point between the RSSI values of the two gateways, marking the optimal handoff point. Thus, this system is able to select the best gateway, provide redundancy, check gateway availability before handoff, and handle handoff failures, thereby improving the efficiency and effectiveness of data delivery.
A Systematic Review on the Acoustic Performance of Nanocellulose-Modified Natural Fibers for Sound Insulation and Absorption Applications Muchlisinalahuddin; Rusli, Meifal; Dahlan, Hendery; Mahardika, Melbi
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.v9i1.51526

Abstract

Noise pollution has become an increasingly concerning environmental issue, driving the development of sustainable acoustic materials as alternatives to conventional synthetic materials. This research conducts a systematic literature review on the acoustic effectiveness of natural fiber-based nanocellulose in sound isolation and absorption applications. The research method employs a qualitative approach with a comprehensive analysis of scientific publications from Scopus, Web of Science, ScienceDirect, and Google Scholar databases over the past ten years. The review results indicate that modification of natural fibers such as coconut coir, hemp fiber, banana pseudostem, and rice straw with nanocellulose at a concentration of 1-1.5% w/v is capable of improve sound absorption coefficients up to 0.7-0.9 in the 500-2000 Hz frequency range, comparable to synthetic materials such as fiberglass and mineral wool. This material demonstrates advantages in terms of dimensional stability improvement of 35-40%, lightweight density (150-300 kg/m³), balanced acoustic characteristics across a broad frequency spectrum, and biodegradable properties providing minimal environmental impact. The potential applications of this material are extensive in construction, automotive, and acoustic industries, with noise reduction capabilities of up to 8-12 dB. Despite facing challenges in raw material variability and production scalability, natural fiber and nanocellulose-based acoustic materials have promising prospects as sustainable solutions to global noise pollution problems with competitive performance against conventional materials.
Design of Helical Type Steam Generator for Experimental Power Reactor – Helium Side Putri, Sunny Ineza; Subekti, Mohammad; Martin, Awaludin; P, Brian Agung Cahyo; Hermanto, Jheri; Siregar, Ansor Salim
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.v9i1.51645

Abstract

Previous research has not analyzed the helium temperature distribution in the RDE steam generator shell. This study aims to fill that gap by analyzing these thermal characteristics with empirical calculations and Ansys Fluent simulations. The validity of the RDE steam generator design is reaffirmed, having been successfully analyzed from both the water-flow perspective in previous research and the helium-side perspective in the present study. The analytical methods used herein showed strong consistency, with empirical and numerical simulation results differing by less than 10% across all parameters. Although the calculated shell height of 5.73 m exceeds the RDE design's 4.97 m, the overall design's validity is confirmed.
A Web-Based Navigation Control System for Lake Toba Cleaning Using NodeMCU ESP8266 and Pulse Width Modulation (PWM) Simatupang, Frengki; Manalu, Istas Pratomo; Siagian, Pandapotan; Sigiro, Marojahan Mula Timbul; Wowiling, Gerry Italiano; Sinambela, Eka Stephani; Saragih, Ripandy; Yosheva, Grace; Silaen, Romaito
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.v9i1.51670

Abstract

Waste pollution in Lake Toba has become a critical environmental issue, threatening both its natural beauty and ecological sustainability. Manual waste collection methods remain limited in terms of efficiency and operational reach. This study aims to design and evaluate a web-based navigation control system for a floating surface-cleaning device utilizing the NodeMCU ESP8266 microcontroller. The system enables real-time control of direction and motor speed through a web interface, employing Pulse Width Modulation (PWM) for precise speed regulation. A prototype-based engineering approach was adopted, encompassing system design, implementation, and performance testing on land and in water environments. The experimental results indicate that the system successfully responded to all navigation commands (forward, backward, turn, pivot, and stop) with 100% accuracy under a stable local Wi-Fi network. Motor performance in water was found to be approximately 15–20% lower than on land due to fluid resistance. Battery endurance tests showed an operational time of approximately 3 hours on land and 2.1 hours in water at a 60% PWM duty cycle. Overall, the system demonstrates effective and flexible performance and holds promise for further development through the integration of sensors, camera modules, GPS-based autonomous navigation, and LoRa communication.

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