Asfari Hariz Santoso

Peningkatan produktivitas pertanian menjadi salah satu tantangan utama dalam mendukung ketahanan pangan di Indonesia. Salah satu cara yang dapat dilakukan untuk mengatasi tantangan tersebut adalah dengan mengintegrasikan teknologi pertanian modern. Pengabdian ini bertujuan untuk meningkatkan produktivitas tanaman melon melalui penerapan sistem smart hidroponik yang terintegrasi dengan Pembangkit Listrik Tenaga Surya (PLTS). Sistem smart hidroponik ini memungkinkan pengelolaan lingkungan tumbuh yang lebih efisien, dengan pengaturan otomatis terhadap kebutuhan air, nutrisi, dan kelembaban, serta pemanfaatan energi terbarukan dari matahari untuk memenuhi kebutuhan listrik. Dengan metode ini satu tanaman melon akan menghasilkan dua buah melon, sebelumnya hanya menghasilkan 1 melon saja. Melalui pengabdian masyarakat ini, petani diperkenalkan dengan teknologi baru yang dapat mengoptimalkan hasil pertanian, mengurangi biaya operasional, dan meningkatkan keberlanjutan pertanian. Hasil yang diperoleh menunjukkan adanya peningkatan produktivitas tanaman melon, serta pengurangan penggunaan sumber daya energi konvensional dan air tanah. Selain itu, penerapan teknologi ini juga berdampak positif pada kualitas tanaman dan pendapatan petani, serta memberikan kontribusi pada pengurangan jejak karbon. Hasil yang diperoleh menunjukkan peningkatan produktivitas tanaman melon serta efisiensi penggunaan air dan energi. Selain itu, teknologi ini berkontribusi pada peningkatan kualitas tanaman, pengurangan biaya operasional, serta peningkatan pendapatan petani mitra di Kabupaten Trenggalek, Jawa Timur.

Pengabdian kepada masyarakat ini bertujuan untuk memberikan solusi teknis bagi Paguyuban UMKM Tunggulwulung yang memiliki masalah dalam memproduksi kopi bubuk. Kedai kopi yang mereka kelola masih menggunakan kopi instan, sehingga tidak memiliki cita rasa khas. Melalui implementasi motor induksi 1 fasa sebagai penggerak mesin penggiling biji kopi, kedai kopi diharapkan dapat memproduksi kopi dengan cita rasa yang lebih unggul dan dapat bersaing. Program ini mencakup pelatihan teknis, pemasangan, dan operasional motor induksi yang mudah dioperasikan dan dirawat. Hasil dari program ini dengan memanfaatkan motor induksi dengan daya 200 watt dapat menggerakkan mesin giling biji kopi dengan kapasitas 4 kilo gram per jam sehingga mampu meningkatkan daya saing produk kopi kedai tersebut.

Minimnya pencahayaan di wilayah RT. 02 RW. 20 Kelurahan Purwantoro, Kecamatan Blimbing, Kota Malang, menyebabkan risiko kecelakaan dan tindak kriminalitas di malam hari. Program pengabdian ini bertujuan mengatasi masalah tersebut dengan penerapan smart lighting system yang hemat energi. Metode yang digunakan melibatkan pemasangan sistem pencahayaan di empat titik strategis menggunakan pendekatan community-based, di mana warga berpartisipasi dalam instalasi dan pemeliharaan. Survei awal dilakukan untuk mengidentifikasi kebutuhan, dilanjutkan dengan pelatihan penggunaan teknologi kepada warga. Hasil menunjukkan peningkatan keamanan dan kenyamanan warga, serta pengurangan konsumsi energi listrik. Teknologi smart lighting yang diterapkan terbukti efisien, otomatis, dan meningkatkan partisipasi warga dalam merawat fasilitas umum. Program ini juga berhasil memperluas pemahaman masyarakat tentang teknologi hemat energi. Implikasi program menunjukkan pentingnya penerapan teknologi tepat guna untuk meningkatkan kesejahteraan masyarakat, dan berpotensi dikembangkan lebih lanjut dengan integrasi energi terbarukan seperti panel surya.

The application of induction motors is currently very broad, one of which is in the fertilizer industry as a motor for vibrating screens with an auto clean mechanism. In this application, the induction motor is operated with two frequency values of 50 Hz during screening and 60 Hz during the auto clean process. The difference in frequency affects the dynamic characteristics of the induction motor. Especially when operated above the rated frequency, it will result in an increase in motor temperature so that regular monitoring of the motor temperature is needed. This study produces the dynamic characteristics of the motor when the supply frequency is 50 Hz with a transient condition duration of 0.5 seconds and a torque at steady state conditions of 25.89 Nm, while when the supply frequency is 60 Hz the transient condition duration is 0.5 seconds with a torque at steady state conditions of 31.03 Nm.

Single phase induction motors are one of the most frequently used types of motors because of their economical, sturdy, simple and easy maintenance advantages. One application is for electric vehicles. When single phase induction motors are applied to electric vehicles there are problems related to torque regulation based on vehicle operating conditions where when operating on light road conditions the torque produced by the motor remains high. In this research, a single-phase induction motor was made to have the same proportion of torque produced by the main coil and auxiliary coil or a 1kW 1000 rpm symmetrical two-phase induction motor. The type of winding applied to the stator is divided screws with the main and auxiliary coils each occupying 18 stator slots, 45 conductors per slots,, with a conductor diameter of 1.2 mm. As a phase shifter at start and operation so that they differ by 90°, a capacitance of 505.51 µF is used. As a result of the winding modification, the induction motor parameter values ​​for each stator winding are the same. So the starting torque of the main and auxiliary coils is 3.89 Nm and 3.88 Nm respectively and the nominal torque produced by the main and auxiliary coils is 4.28 Nm and 4.29 Nm respectively.

Indonesia is geographically located on the equator, which has very strong solar radiation and high rainfall, making it suitable for farming. Hydroponics is used as a growing medium for planting without using large areas of land by utilizing water and prioritizing the nutritional needs of plants. NFT is a hydroponic method that is easy to implement and is quite effective for plants. However, this method requires a cycle that cannot be stopped, so it requires a pump that must be on all the time. Therefore, a backup supply is needed that can guarantee the availability or continuity of the supply of electricity to the load by using an Automatic Transfer Switch (ATS) which keeps the system running if the PLN goes out by using PLTS and can be monitored and controlled at any time using Internet of things (IoT) technology. ). From the results of trials and analysis carried out that the performance of the system when in automatic mode, that is, when the battery reaches a value of 11.3 Volts, it will switch to the PLN supply. The supply from PLTS will change to PLN's supply automatically with a predetermined time, namely from 09.00 WIB to 15.00 WIB. If PLN experiences a blackout, it will switch to the PLTS source until PLN is back on.

At the Banyupoh Feeder there is a Gondol Hubung Substation, which has 2 outgoings, the first line goes to the Banyuwedang Feeder and the second line goes to Penyabangan. However, because there is no protection on the outgoing side, if there is a disturbance in the first section on one of the outgoing sides, it will cause 1 feeder with a total of 49 transformers to experience a blackout. To overcome this condition, it is necessary to add relays at the substation. After the addition of relays at the substation, the impedance and short-circuit current are recalculated which can be used to determine the timing of the OCR and GFR relays at the new substation for each outgoing. The calculation results are then converted into a curve to determine the coordination of the protection with the existing protection relays on incoming, outgoing and recloser in anticipating disturbances in the first section at the Banyupoh Feeding Substation. After setting the protection relay on the outgoing side of the substation, the outage area due to interference can be minimized. When section 1 of the Banyuwedang Feeder is disturbed, the relay on the outgoing Gondol Substation will work so that the Energy Not Served (ENS) which was previously 40.008 kWh becomes 20.511 kWh. If section 1 of the Feeding Feeder is disturbed, then the relay on the outgoing Substation Hubung Gondol will work so that the ENS which was previously 40.008 kWh becomes 19,497 kWh, so that the amount of energy that is not channeled is reduced by 50% and this makes the service better.

Nowadays energy has a very important role in the life of human civilization. One of the energy that is still widely used and almost cannot be reduced from the community is electrical energy. Energy audit is one of the processes in managing energy use to bec ome more efficient. The purpose of this study was to determine the potential for energy savings that can be carried out optimally and accurately in Cold Storage, Malang Regency. This study uses data collection methods with Web-based Power Quality Meter PM5110 and account data from energy use during the period June 2020 to May 2021. Data retrieval using a Web-based Power Quality Meter PM5110 which is carried out for 24 hours on weekdays, then the total consumption of kWh in one day reached 119,538 kWh, while the total usage of kWh in one month is 3586.14 kWh for the month of June and for the total usage for the period of one year is 43631.37 kWh. Regarding the value of energy consumption kWh in a period of one year, it can be generated by dividing the total energy consumed by the building in one year by the total gross floor area of the building. Based on the results of the IKE calculation in the Cold Storage Building, Malang Regency from the results before the recommendation of 34.91 kWh/m2/year and for the result after the recommendation is 174,841 kWh/m2/year, which is included in the very efficient category according to the ASEAN USAID 1987 standard. For energy saving opportunities in the lighting system and cooling system, it can be done by using energy-efficient lamps and changing the operating pattern in the cooling room.