PISTON: Jurnal Teknologi

Pengujian Mekanik (Kekerasan dan Impact) Logam Ferro Valve Plat Double Dampers yang Digunakan Sebagai Penyaring Abu Boiler

2026-05-05T00:23:04+00:00

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 (0^oC) = 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.

Studi eksperimen prestasi termoelektrik sebagai pemanen energi listrik mikro: efek gradien temperatur dan konfigurasi modul

2026-05-12T23:54:45+00:00

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.

Rancang Bangun Mesin Pemotong Rumput Berbasis Sistem Kontrol

2026-04-07T23:25:11+00:00

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.