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Journal : Foristek

PERANCANGAN PROTOTYPE PENJEJAK CAHAYA MATAHARI PADA APLIKASI PEMBANGKIT LISTRIK TENAGA SURYA Hardianto, Hendry Eko; Rinaldi, Reza Satria
FORISTEK : Forum Teknik Elektro dan Teknologi Informasi Vol 2, No 2 (2012)
Publisher : FORISTEK : Forum Teknik Elektro dan Teknologi Informasi

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Abstract

Abstract - Solar energy is one of the alternative energy sources which can be used as electrical energy. As the effect of earth rotation and revolution, it had not been optimized maximally yet. The rotation of earth causes the sun moves from east to west every day, and the revolution of earth causes the sun move from north to south every year. These phenomenons cause the different intensity of sun light in every earth surface. To optimize the sun light, the design and realization of solar tracker is very important. The solar tracker has to be able to track the position of the sun and move the solar cell to face the sun light. The solar tracker can move in two axis with moving type of rotate and tilt, so  it works optimally every time. This solar tracker is designed by using photo diode as light sensor and servo motor as actuator. The system uses ATMega8535 as control unit which able to process signal from the sensor and resulted Pulse Width Modulation to control servo motor moving. The testing showed this solar tracker capable to raise the average power to 0.676 watt and the eficiency to 36,216%. The error of tracking is 90 at heavy cloud. Key Word: Light Sensor, Servo Motor, Solar Tracker
PERANCANGAN PROTOTYPE PENJEJAK CAHAYA MATAHARI PADA APLIKASI PEMBANGKIT LISTRIK TENAGA SURYA Hendry Eko Hardianto; Reza Satria Rinaldi
Foristek Vol. 2 No. 2 (2012): Foristek
Publisher : Foristek

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Solar energy is one of the alternative energy sources which can be used as electrical energy. As the effect of earth rotation and revolution, it had not been optimized maximally yet. The rotation of earth causes the sun moves from east to west every day, and the revolution of earth causes the sun move from north to south every year. These phenomenons cause the differentintensity of sun light in every earth surface. To optimize the sun light, the design and realization of solar tracker is very important. The solar tracker has to be able to track the position of the sun and move the solar cell to face the sun light. The solar tracker can move in two axis with moving type of rotate and tilt, so it works optimally every time. This solar tracker is designed by using photo diode as light sensor and servo motor as actuator. The system uses ATMega8535 as control unit which able to process signal from the sensor and resulted Pulse Width Modulation to control servo motor moving. The testing showed this solar tracker capable to raise the average power to 0.676 watt and the eficiency to 36,216%. The error of tracking is 90at heavy cloud.
ANALISIS KARAKTERISTIK MINYAK TERHADAP TEGANGAN TEMBUS TIGA JENIS MINYAK SEBAGAI ALTERNATIF MINYAK ISOLASI TRANSFORMATOR Aggraini, Ika Novia; Situngkir, Hoklan Roianri Rifki Rinaldi; Rodiah, Yuli; Rinaldi, Reza Satria; Arfan, Muhmammad
Foristek Vol. 15 No. 1 (2025): Foristek
Publisher : Foristek

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54757/fs.v15i1.754

Abstract

This research seeks to assess the influence of viscosity and moisture content on the breakdown voltage of canola oil, corn oil, and sunflower seed oil, as well as to evaluate the quality and properties of these oils as potential alternative liquid insulations for transformers. Transformer liquid insulation specifications according to SPLN 50-1982 and IEC 60247:1991 standards include a breakdown voltage of 30 kV/2.5 mm, a maximum moisture content of 30 ppm or 0.003%, and a kinematic viscosity of 40 cSt at 20°C. During the assessment of moisture content and viscosity, two oil conditions are examined: fresh oil and old oil after the breakdown voltage test. The test data indicates that moisture content and viscosity influence breakdown voltage. Specifically, canola oil, with a moisture content of 0.17% and a viscosity of 28 cSt, exhibits a breakdown voltage of 20.5 kV/2.5 mm; corn oil, with a moisture content of 0.11% and a viscosity of 27 cSt, demonstrates a breakdown voltage of 25.3 kV/2.5 mm; sunflower seed oil, with a moisture content of 0.12% and a viscosity of 26 cSt, shows a breakdown voltage of 21.5 kV/2.5 mm. Nevertheless, the test findings indicate that the breakdown voltage fails to comply with the transformer insulating oil requirement.