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All Journal SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Jurnal Rekayasa Material, Manufaktur & Energi RELE: Rekayasa Elektrikal dan Energi Jurnal Teknik Elektro JTTM: Jurnal Terapan Teknik Mesin
Siregar, Chandra A
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Investigasi Peleburan dan Pembekuan Phasa Change Material (PCM) Paraffin Wax Sebagai Thermal Energy Storage Pada Pipa Handoko, R; Suwandi, A; Siregar, Chandra A; Siregar, Ahmad Marabdi
Rekayasa Material, Manufaktur dan Energi Vol 6, No 2: September 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i2.16336

Abstract

Phase change materials (PCM) are materials that can change phase from solid to liquid and vice versa from water to solid. PCM is the most efficient material for storing heat energy in the form of latent heat. This study aims to investigate melting and freezing of PCM types of paraffin wax in pipes. The investigation was carried out in 3 experiments with heat source temperatures of 90 0C, 85 0C and 80 0C. To facilitate investigation, paraffin wax is placed in a transparent tube. During the smelting process, observations were made for 600 minutes, and data recording and shooting were carried out every 60 minutes. The result is that the melting of paraffin wax starts from the top of the heat source side. The higher temperature paraffin wax moves upwards and the lower one moves downwards. On freezing, also found the same thing. The flow pattern is affected by the temperature of the paraffin wax itself. In addition, it can also be concluded that the higher the temperature of paraffin wax, the higher its ability to store heat energy.
PERANCANGAN PLTS ON-GRID BERBASIS MICRO INVERTER 500 WATT Harahap, Partaonan; Rimbawati, Rimbawati; Siregar, Chandra A
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Publisher : RELE (Rekayasa Elektrikal dan Energi) : Jurnal Teknik Elektro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rele.v6i2.17688

Abstract

Sistem on-grid ialah rangkaian fotovoltaik yang cuma menciptakan energi kala jaringan energi utilitas (PLN) ada Sistem ini wajib tersambung ke grid supaya berperan Sistem ini bisa mengirim kelebihan energi yang dihasilkan kembali ke jaringan kala sel surya memproduksi energi berlebih sehingga terdapat surplus buat digunakan nanti. PLTS On-Grid ini senantiasa tersambung dengan Jaringan Listrik Universal serta memaksimalkan tenaga dari panel surya buat menciptakan tenaga listrik secara optimal Tenaga yang dihasilkan dari matahari secara langsung disalurkan ke beban yang tersambung ke jaringan, sehingga bisa dikatakan sistem On-Grid ini sanggup memaksimalkan pemakaian tenaga matahari, dengan tujuan kurangi tagihan listrik. Hasil pengukuran, perhitungan serta analisa informasi yang sudah dicoba kalau model PLTS on grid berbasis micro inverter ini sudah berperan dengan baik, sanggup membangkitkan energi listrik, sanggup menyalurkan listrik ke beban serta pula sanggup menyalurkan energi listrik ke jaringan PLN, sehingga model ini siap buat dipakai selaku materi praktek serta pula selaku perlengkapan promosi PLTS on-grid kepada warga Dari hari ke 5 pengukuran yang dicoba hingga energi rata-rata keselurahan dengan energi beban sebesar 104.5 Watt, di posisi PLTS sebsar 53.8 Watt serta pada posisi posisi PLN sebesar 72.4 Watt. 
Design and manufacture of mechanical drive systems for road sweepers on flat surfaces Iqbal Raihan; Mirzal Lubis; Siregar, Ahmad Marabdi; Siregar, Chandra A; Affandi
JTTM : Jurnal Terapan Teknik Mesin Vol 5 No 1 (2024): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v5i1.789

Abstract

The sweeper works by utilizing pushing force because it does not use a motor, so it is environmentally and energy friendly. The manufacturing and assembly process is carried out after all machine components are made according to the designed sizes. The working principle of this machine is that the wheel is the driving source using a gear and chain transmission. The driving source for the directional broom is located on the left side of the wheel, using an umbrella gear to change the direction of rotation of the broom to the opposite direction. Meanwhile, for the distribution broom, the driving source is located on the right side of the wheel. By using two gears that touch each other and the difference in the number of teeth, namely three to one, can produce a fast sweeping speed. The function of the directional broom is to direct rubbish that is in the corners of walls or rooms to the middle of the machine. Meanwhile, the function of the distribution broom is to distribute waste to the tub which has been directed by the guide broom towards the middle of the machine. After testing, it turned out that this sweeping machine can optimally pick up all the rubbish on a flat surface along with the dust. The results of the design of this machine have been able to produce very good performance, apart from saving time it also produces fairly clean sweeping results
Pengaruh sudut twist drill terdahap kekasaran dan kebulatan pada proses pemesinan drilling Nasution, Arya Rudi; Wahyudi, Fauzi S; Siregar, Chandra A; Affandi, Affandi; Fuadi, Zahrul
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 17, No 1 (2023): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.17.1.1-6

Abstract

Coolant and twist drill angle is one of the factors that affect the quality of the workpiece. Coolant selection and twist drill angle are useful for reducing hole roughness and increasing drill hole precision. In addition, the coolant must be easily degraded in the environment so that the environment is not polluted. An example of coconut oil is oil that can be degraded in the environment. This study aims to determine the effect of coconut oil (CO) and drill bit angle on the hole and hole precision obtained during the drilling process. In experimental testing, conventional drilling machines are used for test testing. the tests were carried out under various machining parameters, namely spindle rotation speed of 1100 rpm, drill bit angles of 130° and 135°. Based on these parameters, the spindle rotation speed of 1100 rpm and the drill bit angle of 135° is rougher than the drilling results for the spindle rotation speed of 1100 rpm and the drill bit angle of 130°. In addition, the roundness of the drilled holes for a spindle rotational speed of 1100 rpm and a drill bit angle of 130° is more precise than the spindle rotation speed of 1100 rpm and a drill bit angle of 135°.
Co-Authors Affandi Affandi Affandi Ahmad Marabdi Siregar Handoko, R Harahap, Partaonan Iqbal Raihan Mirzal Lubis Rimbawati Rimbawati, Rimbawati Rudi, Arya Suwandi, A Wahyudi, Fauzi S Zahrul Fuadi