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All Journal JURNAL NASIONAL TEKNIK ELEKTRO Conference on Innovation and Application of Science and Technology (CIASTECH) Infotekmesin Jurnal E-Komtek
Purwiyanto
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Agriculture, Biological Sciences & Forestry Computer Science & IT Education Electrical & Electronics Engineering Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences

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Optimization of Vertical Axis Darrieus Wind Turbine As Aerator Generator Musyafiq, Afrizal Abdi; Illahi , Novita Asma; Purwiyanto; Vicky Prasetia; Hera Susanti
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 7 No 2 (2023)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v7i2.1538

Abstract

Research has focused on a wind turbine system with a vertical-axis Darrieus design with a capacity of 15 watts, serving as an aerator for aeration or adding air to water. The Darrieus turbine, made of aluminium with three corners and a modified NACA 0018 model optimized to work at low wind speeds of 2 m/s, effectively powers a 4-watt DC aerator. Generator voltage readings show a minimum value of 2 volts at a wind speed of 1 m/s and a maximum value of 12.8 volts at a wind speed of 6.2 m/s. The calculated power coefficient is 0.3. Charging the accumulator with a 12 volts/12 Ah takes 23 hours with a generator voltage of 13 volts at a wind speed of 6 m/s. This research reflects Indonesia's progress in optimizing wind energy for sustainable power generation.
DAMPAK STRUKTUR KAPITAL, LIKUIDITAS, DAN BESARAN PERUSAHAAN TERHADAP TINGKAT PROFITABILITAS Dwiastanti, Anis; Purwiyanto; Cahyonugroho, Dionisius Yosan
Conference on Innovation and Application of Science and Technology (CIASTECH) Vol. 7 No. 1 (2024): CIASTECH 2024 Potensi dan Dampak Artificial Intelligence (AI) di Era Society 5.
Publisher : Universitas Widyagama Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/ciastech.v7i1.6914

Abstract

Profitabilitas menjadi ukuran kinerja keuangan perusahaan dalam menghasilkan pengembalian aset perusahaan oleh manajemen. Profitabilitas juga menjadi indikator penilaian bagi para pegiat ekonomi untuk menakar kapabilitas perusahaan. Profitabilitas dapat dipengaruhi oleh kemampuan perusahaan dalam mengatur struktur kapital, tingkat likuiditas dan juga besaran perusahaan. Penelitian ini bertujuan untuk menganalisis bagaimana ketiga variabel tersebut, struktur kapital, likuiditas dan besaran perusahaan dapat mempengaruhi profitabilitas. Dengan menggunakan model penelitian kuantitatif, perusahaan otomotif digunakan sebagai sampel penelitian ini. Terdapat 13 sampel perusahaan otomotif yang menjadi amatan selama tahun 2019-2022. Analisis data dilakukan dengan Regresi Linier Berganda dengan bantuan aplikasi SPSS. Hasil penelitian menyatakan struktur kapital (X1) tidak berpengaruh terhadap profitabilitas (Y), dikarenakan rata-rata total kewajiban perusahaan otomotif lebih kecil dibandingkan dengan total modal yang dimilikinya. Likuiditas (X2) dan Besaran perusahaan (X3) terbukti memiliki dampak dominan kepada profitabilitas (Y). Riset ini juga menjelaskan bahwa semakin tinggi besaran perusahaan berpotensi meningkatkan laba atau tingkat profitabilitas. Kondisi ini dapat terwujud apabila perusahaan mampu mengelola dan memanfaatkan aset yang dimilikinya secara optimal untuk memperoleh keuntungan maksimal. Pengujian secara simultan variabel-variabel independen terhadap profitabilitas dapat dibuktikan hubungannya secara empiris.
Performance Process of Coil Winding Machine Based on Accuracy and Speed for Water Pump Motor Ilahi, Novita Asma; Musyafiq, Afrizal Abdi; Purwiyanto; Rahmat, Saepul; Prima Dewi, Riyani; Purnata, Hendi
JURNAL NASIONAL TEKNIK ELEKTRO Vol 12, No 3: November 2023
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jnte.v12n3.1101.2023

Abstract

A coil winding machine for water pumps using a monitoring system is a development of conventional winding tools. In regular coil winding tools, the coil winding process is done manually by rotating the handle as many times as the desired number of turns. The conventional winding tools have problems consisting of inconsistent working speed and operator-dependent winding continuity. Undesirable windings can occur with conventional winding tools, and the winding process requires close supervision. Therefore, the automatic coil winding machine was developed to optimize the coil winding process. The machine utilizes a DC motor to rotate the coil rolls, replacing the conventional roller handle function. This machining method uses an optocoupler sensor. The sensor serves to identify and evaluate the rotation of the roller. In addition, the ATmega8 microcontroller was applied to develop a system that can work automatically. Data collection involves varying the number of wire turns and the wire diameter dimension. The variation is necessary because the number of windings and wire diameter affect pump efficiency and performance. The data testing showed a machine accuracy rate of 98%, with a maximum difference of 1 coil winding in the results. This data confirms that the coil winding machine meets the tool's accuracy standards.
Evaluasi Sistem Pencahayaan Gedung Pendidikan Perkuliahan Sesuai Standar Nasional Indonesia (SNI) Vicky Prasetia; Supriyono; Purwiyanto
Infotekmesin Vol 13 No 2 (2022): Infotekmesin: Juli, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i2.1546

Abstract

The lighting system is one of the aspects of assessing the function of the building. The building lighting system is included in the health aspect of the building. To achieve proper function, the building lighting system must meet the illumination value of each room according to the type of utilization in accordance with SNI 6197:2011, SNI 6197:2011, SNI 03-2396-2001, dan SNI 03-6575-2001. This study aims to analyze the lighting system in the Gedung Kuliah Bersama at the Politeknik Negeri Cilacap. This study uses a quantitative method by comparing the amount of light intensity based on field measurements, calculation results, and the SNI 6197:2011 standard. Based on the results of observations, data processing, and measurements, it was found that there were still some rooms in the Gedung Kuliah Bersama that did not meet SNI. Rooms that have fulfilled SNI include classrooms, library rooms, language laboratories, lecturer transit rooms, multipurpose rooms, terrace, and warehouses. It is necessary to carry out maintenance and repair of lamps for rooms that do not meet SNI. Maintenance and repair of lighting systems are carried out by replacing, adding, and/or repositioning lamps.
Optimalisasi Output Photovoltaic Menggunakan Pendingin Air Pada Pembangkit Listrik Tenaga Surya Terapung Supriyono; Yusuf, Muhamad; Purwiyanto
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2329

Abstract

Land requirements are one of the obstacles to developing solar power plants . One solution is to utilize the surface of the reservoir for the construction of floating solar power plants. Excessive heat from sunlight received by photovolataics reduces the effectiveness of floating solar power plants output. Excessive heat in photovoltaics can be reduced by cooling methods. In this research, a photovoltaic cooling system using water was developed. A water pump is installed to channel reservoir water to the photovoltaic surface. The cooling system uses two methods, namely the sensor and timer method. In the sensor method, a sensor is installed on the solar power plants to detect the photovoltaic surface temperature. If the temperature detected by the sensor exceeds the photovoltaic effectiveness limit, the water pump is started. In the timer method, the pump is run based on a preset time. Based on the test results, the cooling system is able to increase the photovoltaic voltage output. The average value of the timer mode cooled photovoltaic voltage is 3.79% higher compared to the photovoltaic voltage without cooling and the average value of the sensor mode cooled photovoltaic voltage is 1.02% higher than the photovoltaic voltage without cooling.
Sistem Hybrid Energi Terbarukan pada Alat Pemipil Jagung Purwiyanto; Dewi, Riyani Prima; Zuhairi, Rafi
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2773

Abstract

Mesin pemipil jagung menggunakan motor listrik sebagai penggerak utamanya dan panel surya yang terhubung dengan baterai sebagai sumber energi utamanya dan PLN sebagai sumber energi cadangan. Dengan adanya mesin ini diharapkan mampu meringankan beban petani jagung dalam proses pemipilan yang tadinya masih menggunakan tenaga manual bahkan menggunakan mesin besar dengan biaya yang relatif mahal. Tujuan perencanaan mesin pemipil jagung tenaga panel surya yaitu untuk mengetahui cara membangun alat pemipil jagung menggunakan teknologi panel surya dan untuk mengetahui berapa kapasitas produksi yang dihasilkan mesin pemipil jagung dalam waktu 1 menit. Berdasarkan hasil pengujian sebanyak 5 kali.Nilai rata-rata kapasitas mesin dalam memipil jagung sebesar 760,6 gram/menit.
Co-Authors Afrizal Abdi Musyafiq Cahyonugroho, Dionisius Yosan Dwiastanti, Anis Hendi Purnata Illahi , Novita Asma Muhamad Yusuf, SE., M.Si. Novita Asma Ilahi Prima Dewi, Riyani Riyani Prima Dewi Saepul Rahmat, Saepul SUPRIYONO Susanti, Hera Vicky Prasetia Zuhairi, Rafi