Untuk memenuhi kebutuhan energi listrik yang terus meningkat serta tuntutan energi yang ramah lingkungan, efisien dan berkelanjutan, maka pemanfaatan energi terbarukan harus terus ditingkatkan. Metode yang digunakan adalah dengan membangun pembangkit listrik tenaga angin turbin sumbu horizontal. Teknologi ini mempunyai kelebihan bisa menangkap angin dengan kuat, karena posisinya yang tinggi, efisiensi rotor yang lebih tinggi di banding tipe vertikal, bisa diarahkan ke arah angin, dan mempunyai mekanisme perlindungan terhadap angin yang merusak.Keunggulan teknologi ini sangat cocok dengan topografi negara Indonesia yang memiliki kecepatan angin relatif rendah.Pembangkit listrik tenaga anginturbin sumbu horizontal mempunyai rasio daya yang rendah. Rasio daya keluaran pembangkit listrik tenaga angin dengan turbin tipe horizontal hanya sekitar 30% dari daya angin yang melewati turbin. Pada penelitian ini, untuk meningkatkan daya keluaran pembangkit listrik tenaga angin maka digunakan metode Maximum Power Point Tracker. Dari hasil percobaan dengan berbagai kecepatan angin di dapati bahwa rata-rata daya tanpa MPPT hanya sekitar 44,33% saja sedangkan yang dengan MPPT rasio daya rata-rata mengalami kenaikan yaitu sebesar 49,51%.
Indonesia is currently included in the covid19 virus pandemic category. Many cities have been hit by the Covid19 virus. The city of Madiun has also been confirmed positive for the Covid19 virus. Therefore, to prevent the transmission of the Covid19 virus, prevention efforts are needed. Islamic boarding schools are a gathering place for students from various cities in Indonesia. If there are no prevention efforts at the Islamic boarding school, there will be a new covid19 virus cluster. Community service activities through the partnership program for the Al Mujaddadiyah Islamic Boarding School are focused on developing technology to overcome the prevention of the Covid19 virus in the Islamic boarding school environment. The hope is that with this training, boarding school caregivers and students can better understand the health protocols applied to technology to prevent the spread of the Covid19 virus in the cottage environment.
Indonesia saat ini memiliki 129 gunung berapi yang aktif dan hanya 69 diantaranya yang baru bisa termonitoring dengan baik. Bencana gunung api dapat dihindari dengan melakukan monitoring yang baik terhadap kondisi gunung api secara menyeluruh sebagai mekanisme peringatan dini bencana. Monitoring area gunung api yang cukup luas menjadi kendala tersendiri dikarenakan titik pemantauan yang banyak. Wireless Sensor Network (WSN) merupakan salah satu sistem yang sesuai untuk melakukan pemantauan dengan jumlah titik sensor yang terdistribusi, fleksibel dan terintegrasi. Secara garis besar, sistem WSN terdiri dari receiver dan node sebagai transmiter. Komunikasi dari node menuju receiver dapat dilakukan langsung ataupun melalui node yang lainnya. Standar komunikasi nirkabel dari WSN untuk desain dan aplikasi mengacu pada IEEE 802.15.4. Perangkat yang mendukung standar ini salah satunya adalah X-Bee. X-Bee memiliki keunggulan dalam hal kemudahan penggunaan, relatif murah dan berdaya rendah. Salah satu hal yang menjadi poin penting dalam aplikasi WSN pada gunung api adalah jarak jangkauan. Dalam penelitian ini akan dilakukan studi jarak jangkauan Xbee Pro S3 900 pada area gunung api Kelud menggunakan RSSI. Dalam penelitian ini digunakan tiga buah node dan satu receiver sebagai perangkat pengambilan data. Tiga node transmitter tersebut di tempatkan pada tempat yang sesuai untuk mengamati kondisi gunung api Kelud. Jarak jangkauan XBee Pro S3B 900 LoS dengan konfigurasi yang dilakukan, didapatkan jarak jangkauan 79,2 m, sedangkan pada eksperimen mencapai 3,78 km pada nilai RSSI -60dBm. Jarak jangkauan rata-rata tiga node kondisi non LoS berdasarkan nilai RSSI -80 dBm adalah 50 m sedangkan dalam eksperimen didapatkan 441 m. Nilai RSSI hasil eksperimen didapatkan hasil lebih baik daripada hasil simulasi.
Abstracts: Grounding impedance is an important component of electrical power systems especially for protection for human safety and the continuity of the operation of power systems. At low frequency current injection the characteristics of grounding impedance is very resistive, however at high frequency it may be capacitive or inductive depending on the frequency. In order to build a grounding system used for lightning protection, it needs a careful and accurate design. It will receive high current and high frequency around hundred kilos up to mega hertz, otherwise it is simple grounding for low frequency. This paper reports the modification of a grounding system with vertical layers configuration. This is the novel issue because the other researchers use horizontal layers configuration. In this experiment, the grounding rod is injected by using low to high frequency AC source The modification is made by filling the soil into a grounding rod (cylinder rod) and therefore it created two soil layers of grounding system, and by using three size variations of cylindrical layers of length (L) of 40, 60, and 100 cm; and three size variations of diameter (D) of 20, 30, and 40 cm. These variations will allow us to understand the characteristic of the grounding impedance at low and high frequency, where usually the composition of inner layer soil have lower resistance than the outer soil. The composition of the outer soil consist of 16.85 % clay, 66.18 % silt, 15.48 % sand, and 1.49 % gravel whereas the composition for the inner/filling soil consist of 34.98% clay, 49.55% silt, 15.35% sand, and 0.16% gravel. The value of soil permittivity and resistivity affect the value of grounding impedance at low and high frequency. In general, the results indicated that the grounding impedance at high frequency was higher than at low frequency, but the fluctuation of grounding impedance depended on the condition of inner soil, length and diameter of cylindrical rod. In this research, the grounding impedance was plotted as the function of the frequency and until now the value of this fluctuation cannot be determined accurately.
Rejosari Village has enormous potential, namely there are many abundant rice fields around the settlement. Rejosari Village is located in Kebonsari District, Madiun Regency. Farmers in Kebonsari village have used a water pump that is used in the rice field irrigation system. However, until now many farmers still use PLN as the main source in running electric motors for irrigation systems. So that farmers often experience power outages due to lack of electrical power. Community service activities through a partnership program for farmer groups in Rejosari Village, Kebonsari District, Madiun Regency are focused on making Automatic Transfer Switch (ATS) panels to convert electrical energy source switches from PLN to sources of solar energy from solar panels. This ATS panel contains a switch that can replace the source of electrical energy in an electric motor that was originally from PLN into an energy source from the Solar Panel. The hope is that with this community service program, farmer groups can obtain electrical energy to power the irrigation system and not depend on PLN. This PKM can also reduce the cost of electricity rates incurred by farmers.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.