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All Journal Jurnal Ilmiah Giga Majority Science Journal
Santoso, Hari Hadi
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Humanities Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Law, Crime, Criminology & Criminal Justice

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AN INVESTIGATION OF THE EFFECTS OF WIND VELOCITY ON THE PERFORMANCE OF TURBINES AND GENERATORS Lestari, Kiki Rezki; Alviana, Izkia Dwi; Gunadi, Sunartoto; Wati, Erna Kusuma; Santoso, Hari Hadi
MSJ : Majority Science Journal Vol. 2 No. 1 (2024): MSJ-February
Publisher : PT. Hafasy Dwi Nawasena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61942/msj.v2i1.77

Abstract

Variations in wind speed at 4,6 and 8 m altitudes were analyzed using a 24-hour dataset. The greatest recorded wind velocity was 3.3 m/s at a height of 8 meters, and the lowest was around 2.4 m/s at a height of 4 meters. The investigation also identified discrepancies in velocity between the generator and turbine while they were operating with and without a load. The turbine's speed increased when there was no weight present. The peak wind velocity reached 3.9 meters per second, accompanied by a similar variation of 5.4 rotations per minute. The average discrepancy in rotational velocity between the turbine and generator during periods of low wind was 3.74 RPM. This discovery establishes a fundamental basis for comprehending the movement of wind and enabling future in-depth explorations in the field of atmospheric sciences. The generator's performance is assessed by the measurement of current and voltage, which serves to highlight its versatility and effectiveness. The correlation between wind velocity and generator rotational speed is crucial for energy conversion, since the turbine's velocity needs to be adjusted to match the heightened load, affecting the generator's speed.
IOT-BASED WATER LEVEL MONITORING SYSTEM OF SITU RAWA BESAR Wati, Erna Kusuma; Santoso, Hari Hadi; Laksono, Aryo
MSJ : Majority Science Journal Vol. 2 No. 1 (2024): MSJ-February
Publisher : PT. Hafasy Dwi Nawasena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61942/msj.v2i1.89

Abstract

Pancoran Mas, Depok city has a water catchment area, namely Situ Rawa Besar. Situ Rawa Besar has the potential to overflow during the rainy season which caused flooding in 2020. The water level of Situ Rawa Besar is not monitored in real time so that information on the increase in water level is late to reach the community. Thus, an IoT-based water level monitoring system using ultrasonic sensors was made so that the community was able to monitor the state of Situ Rawa Besar in real time through a prepared website. In order to use the ultrasonic sensor module, there was a failure to read the water level in previous studies. So in addition to monitoring the water level in Situ Rawa Besar, the purpose of making this system is to prove that ultrasonic sensors can be used in water environments such as situ. System testing was carried out at Situ Rawa Besar and at the Prototype. This system is able to monitor the water level for 24 hours with electrical power provided from batteries integrated with solar panels. Testing was carried out on 6 days with an average water level of 70-72cm (alert level). All height data for 6 days is uploaded to the Thingspeak website and can be seen by anyone. Based on the research on the prototype, the system is able to measure the height from 0-182 cm and turn on the alarm when the height is more than equal to 100 cm.
Disain dan Pembuatan Pembangkit Listrik Mandiri Pada Sandal Penyandang Tunanetra Salsabila, Fathiyah Fairuz; Subekti, Agung; Sudrajat, Ajat; Santoso, Hari Hadi; Repi, Viktor Vekky Ronald
Jurnal Ilmiah Giga Vol 24 No 2 (2021): Volume 24 Edisi 2 Tahun 2021
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v24i2.1461

Abstract

Indra penglihatan adalah indra yang sangat dibutuhkan manusia, manusia mengandalkan indra ini untuk menerima informasi.Tetapi, tidak semua manusia terlahir dengan kondisi yang normal ada beberapa yang terlahir dengan kondisi tidak normal seperti halnya dengan penyandang tunanetra yang kehilangan penglihatannya sejak lahir atau blindness. Beberapa penelitian telah dilakukan sebelumnya dengan perkembangan teknologi yang ada, banyak peneliti yang membuat serta merancang alat tunanetra menggunakan sensor. Namun hingga saat ini alat navigasi tunanetra yang ada masih menggunakan sumber energi listrik habis pakai dari baterai. Maka dari itu, pada penelitian ini dirancang alat navigasi untuk penyandang tunanetra menggunakan sumber energi listrik yang berasal dari piezoelektrik. Rancang bangun alat, menggunakan 4 keping piezoelektrik yang dihubungkan secara seri pada sandal navigasi ini. Diberikan tekanan langkah kaki untuk menghasilkan energi. Perancangan alat dimulai dengan pembuatan kontruksi bagian pemanen energi yang didalamnya diletakan piezoelectric generator. Bagian penyalur energi yang didalamnya terdapat komponen boost converter, modul charging, dan baterai. Bagian terakhir yaitu sistem navigasi didalamnya terdiri dari sensor ultrasonik HC-SR04 yang tehubung dengan ic ne555 dan aktuator berupa cell motor vibrator. Berdasarkan Hasil Penelitian sistem pemanen energi yang dibuat berhasil digunakan untuk menghidupkan daya perangkat elektronik seperti IC NE555, Sensor Ultrasonik HC-SR04, dan Vibrator. Pemanen energi dapat menghasilkan tegangan keluaran rata-rata sebesar 9.57V dan arus pengisian rata-rata sebesar 12.7mA, sehingga daya yang dihasilkan sebesar 0.122 Watt dan sistem navigasi pada sandal ini berhasil untuk menggunakan IC NE555 yang berfungsi sebagai pembangkit frekuensi dari sensor ultrasonik HC-SR04 tanpa menggunakan pemrograman apapun dengan tingkat keberhasilan sebesar 96%.
Co-Authors Agung Subekti, Agung Ajat Sudrajat Alviana, Izkia Dwi Gunadi, Sunartoto Kiki Rezki Lestari, Kiki Rezki Laksono, Aryo Repi, Viktor Vekky Ronald Salsabila, Fathiyah Fairuz