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The Sutami Hydroelectric Power Plant managed by PLN Nusantara Power UP Brantas is one of the power plants that relies on air resources to generate electricity. However, the optimization of electricity production can still be improved by considering the availability of primary energy and the interests of related stakeholders. This study aims to create a simulation of operating patterns to optimize the daily electricity production of the Sutami Hydroelectric Power Plant using the MS Excel Solver program. The total electrical energy in March based on the results of the simulation calculation was 56,537,445.55 MWh, 3.09% greater than the actual data of 54,792,800 MWh. The results of the simulation calculation of electricity production in June 2024 were 27,564,315.75 MWh, 3.82% greater than the actual data of 26,511,800 MWh. In FDC 2014-2023, the average mainstay discharge is 32 m3/s available throughout the year to be utilized by water turbines to produce a minimum power of 20 MW. Meanwhile, from the estimated historical data obtained by FDC 2024-2033 with an average mainstay discharge of 40.68 m3/s to produce a minimum power of 30 MW.

Efficient energy use in household appliances has become a primary concern as awareness of environmental sustainability grows. Smart electric stoves with automatic temperature control features offer an innovative solution to enhance energy efficiency while ensuring comfort and safety during use. This study aims to design and develop a smart electric stove system based on a microcontroller with automatic temperature control algorithms. The system employs temperature sensors to detect real-time temperature changes and a Proportional-Integral-Derivative (PID) algorithm to maintain stable temperatures as set by the user. A simple and intuitive user interface is designed to facilitate operation, while the automation feature allows the system to shut off the heating element independently when the temperature exceeds a safe threshold. Test results demonstrate that the designed system can reduce energy consumption by up to 25% compared to conventional electric stoves without automatic controls. Therefore, this research significantly contributes to the development of energy-efficient and safe smart kitchen appliances.

This study aims to see the effect between energy subsidies and electricity consumption on economic growth in Indonesia. This study uses secondary time series data for the period 2014-2023 with a quantitative approach using the Eviews 12 software analysis tool. The variables in this study are energy subsidies, electricity consumption and economic growth which are analyzed by multiple linear regression methods. The results showed that energy subsidies have a positive and insignificant effect on economic growth, electricity consumption has a positive and significant effect on economic growth in Indonesia. While energy subsidies and electricity consumption simultaneously have no significant effect on economic growth in Indonesia in the 2014-2023 period.

The increasing number of motor vehicles in Indonesia produces repetitive mechanical loads on road surfaces that are rarely converted into useful energy. This study designs and evaluates a piezoelectric energy-harvesting speed bump intended to support low-power street lighting. The prototype integrates 25 piezoelectric discs (50 mm diameter) connected in series, an AC–DC bridge rectifier, a 2.7 V/500 F supercapacitor for short-term storage, and a DC–DC step-up converter to charge a 12 V battery. Field tests used a motorcycle at speeds of 5, 10, and 15 km/h with rider masses of 48, 70, and 79 kg; each condition was repeated ten times and averaged. Output voltage, current, and electrical energy per pass were measured after rectification. Results indicate that higher speed and mass increase electrical output, with a peak energy of 0.021 J at 15 km/h and 70 kg and an estimated conversion efficiency of about 0.20%. After repeated charging cycles, stored energy powered a 12 V/20 W LED lamp for several minutes. The proposed integration of series piezoelectric elements with supercapacitor buffering and step-up regulation demonstrates a feasible micro-energy harvester for traffic-dense areas and provides a basis for durability and scaling studies. Future work addresses packaging, fatigue, and multi-vehicle loading.

Developing and developed countries rely heavily on the use of electrical energy to carry out social and economic activities. The purpose of this study is to analyze economic growth and its influencing factors in the period 2004-2023. This research uses time series data. The data method used is the VECM model. The results of this study indicate that there is a one-way causality relationship between variables. In the short term only CO2 emission variables affect economic growth, while in the long term all variables such as electricity and population can affect economic growth.

Tower 1 at Institut Teknologi Sepuluh Nopember Surabaya is a high-rise building (High Risk Building) in the education and office sectors, experiencing an annual increase in energy consumption. Therefore, regular and thorough energy audits are necessary to save electricity consumption and ensure that usage aligns with the Indonesian Ministry of Energy and Mineral Resources Regulation No. 13 of 2012. An energy audit is a method to calculate the energy consumption level of a building and determine potential energy savings through energy conservation. The Electrical Energy Consumption Intensity (IKE) is used as a parameter to determine whether the building's energy consumption is efficient or wasteful. The initial energy audit of Tower 1 was conducted quantitatively with on-site measurements over one year, covering the building's electrical system and area. The measurements indicated that the IKE of Tower 1 is 50.86 kWh/m²/year. Subsequently, the total installed electrical energy consumption load was calculated, yielding an IKE of 166.15 kWh/m²/year. Based on the initial energy audit results, energy conservation measures were recommended, including upgrading the lighting system with higher lumen lamps and adjusting air conditioning (AC) to the established standards. Implementing these recommendations resulted in an increased IKE of 176.04 kWh/m²/year, which is still considered efficient compared to the ASEAN-USAID standard of 240 kWh/m²/year.  

Pengelolaan energi listrik yang tepat merupakan faktor penting dalam mengelola konsumsi energi listrik secara lebih efisien, konsep yang sangat penting di fasilitas-fasilitas seperti Gedung Teknik Elektro Universitas Merdeka Malang. Penelitian ini menggabungkan penggunaan energi listrik yang dipantau dengan bantuan sistem SCADA (Supervisory Control and Data Acquisition) melalui komunikasi Modbus-LoRa WAN. SCADA adalah sistem integratif dan waktu nyata untuk pemantauan dan pengendalian, Modbus cocok untuk kolaborasi yang andal, sementara LoRaWAN unggul dalam menyediakan sistem nirkabel jarak jauh. Sistem ini terdiri dari sensor energi listrik, unit kontrol, dan peralatan komunikasi yang semuanya digunakan untuk memantau, memproses, dan menyampaikan informasi terkait penggunaan listrik. Makalah ini juga mengungkapkan hasil implementasi di Gedung Teknik Elektro UNMER, di mana sistem yang diidentifikasi dapat menyediakan informasi waktu nyata tentang konsumsi energi listrik. Implementasi ini sebaiknya digunakan sebagai referensi untuk mencapai cara yang lebih cerdas dan berkelanjutan dalam mengelola energi di gedung-gedung lainnya.

Karena meningkatnya kebutuhan listrik masyarakat Indonesia setiap tahunnya, penelitian sedang dilakukan untuk mengubah energi matahari menjadi energi listrik yang ramah lingkungan melalui konversi panel surya yang menghasilkan arus searah (DC). Karena sebagian besar panel surya diletakkan dalam posisi statis atau tidak bergerak, kemampuannya dalam menyerap sinar matahari tidak maksimal. Dengan menggunakan solar tracking sumbu ganda, posisi panel surya harus selalu melacak pergerakan cahaya matahari guna memaksimalkan energi matahari. Untuk mengetahui cara terbaik dalam menyerap sinar matahari, penelitian ini akan membandingkan daya listrik yang dihasilkan panel surya dengan dan tanpa solar tracking (statis). Penelitian ini menggunakan metodologi komparatif untuk mengetahui perbedaan keluaran daya antara solar tracking dan panel surya statis. Tegangan (V) diukur dengan multimeter, dan arus (I) diukur dengan tang ampere. Empat sensor LDR digunakan pada pelacak surya ini untuk mendeteksi sinar matahari. Mikrokontroler Arduino membaca keluaran sensor LDR dan menyalurkannya ke motor servo yang menggerakkan panel surya. Pengujian menggunakan panel surya statis dan solar pelacak, serta pengumpulan data arus (Ampere) dan tegangan (Volt) selama delapan jam, mulai pukul 08.00 WIB hingga pukul 16.00 WIB. Berdasarkan hasil pengukuran tegangan dan arus diperoleh daya total (P) sebesar 6,30 W tanpa solar tracking (statis) dan 30,37 W dengan menggunakan solar tracking. Hasil perhitungan panel surya dengan solar tracking dan tanpa solar tracking memperoleh persentase arus sebesar 78,37% dan daya sebesar 79,26%. Hasil penelitian ini mengungkapkan bahwa panel surya dengan menggunakan solar tracking lebih efisien dan optimal dalam menyerap sinar matahari dibandingkan tanpa solar tracking (statis).

A simple thermal waste generator is a promising solution for managing waste and generating electricity. This study aims to design and develop the tool. Through waste composition analysis, thermal design planning, prototype construction, and tool performance testing, we succeeded in creating an effective prototype. In performance testing, this tool is able to generate enough electrical power to meet daily energy needs on a small scale. Thus, this simple thermal waste power generator shows potential as an effective and environmentally friendly solution. Nevertheless, further research is needed to improve the efficiency and scalability of the tool, as well as to optimize the management of the residue from burning waste.

Based on national policy, renewable energy is a source of energy that can be renewed, such as water, geothermal, sun, biomass, wind, changes in sea temperature, biogas, biofuel and sea waves. The sun is a type of renewable energy that is used to fulfill human needs. This condition is because the sun is basically eternal or never runs out, so its use is easier than other renewable energy. PLTS is a power plant that converts sunlight energy into electrical energy, often called a solar cell. This design is intended to study the hybrid PLTS design system to reduce dependence on electrical energy from PLN. A hybrid system is a system that uses two energy sources which will then back up each other. The results of this test in the solar panel test, the highest voltage was 17.51 ​​and the highest current produced by the solar panel was 4.12, and the battery charging test for 9 hours was 51.85Ah. Weather conditions and time differences cause the light intensity received by the panel to produce varying values, voltage, current and power due to uncertain weather conditions.

Banten Province has a number of dams that have the potential to be developed as micro hydro-based renewable energy centers. Micro hydro is a technology that utilizes water flow to produce electricity on a small scale, ideal for areas with abundant water resources. The dam in Banten, which was originally built for irrigation, flood control and raw water supply, can be optimized to produce environmentally friendly electrical energy. This research uses literature study methods and secondary data analysis to evaluate the potential of dams in Banten as a micro hydro renewable energy center. The data used includes official reports, scientific publications, and data from government agencies. The analysis includes evaluation of flow capacity and water fall height, as well as the environmental impact of implementing micro hydro technology. The research results show that several dams in Banten have adequate flow capacity and water fall height to support micro hydro installations. The environmental impact of micro hydro installations can be minimized by implementing existing best practices. Micro hydro development in Banten dams can reduce dependence on fossil energy and support the national renewable energy mix target. This research recommends the development of supportive policies and the participation of local communities to realize this potential. In this way, the dam in Banten can be transformed into a renewable energy center that contributes significantly to energy security and environmental sustainability in Indonesia.

Generator merupakan alat yang digunakan untuk mengubah energi gerak mekanik menjadi energi listrik dengan frekuensi putaran rotor sama dengan frekuensi tegangan yang dibangkitkan. Generator menggunakan prinsip elektromagnetik dalam pengoperasian energinya. Permasalahan yang sering muncul pada generator adalah penggunaan beban yang berlebihan sehingga menimbulkan perlambatan pada putaran rotor. Ketika kebutuhan beban meningkat dan tidak dapat dipenuhi oleh generator maka perlu dilakukan pelepasan beban pada system. Hal ini dimaksudkan untuk menstabilkan frekuensi serta keseimbangan antara daya generator dan beban. Pada penelitian ini telah diketahui bahwa pembebanan sangat berpengaruh terhadap frekuensi generator. Berdasarkan hasil pengukuran beban diketahui bahwa beban sebesar 350 kW, 400 kW dan 440 kW menyebabkan terjadinya penurunan frekuensi menjadi 49,8 Hz, 49,2 Hz dan 49 Hz.

Air pollution and greenhouse gas emissions produced by motorized vehicles are one of the main problems in big cities. This encourages the development of more energy efficient and environmentally friendly vehicles, such as electric vehicles. This journal discusses the development of energy-efficient electric vehicles for urban transportation, with a focus on battery technology, vehicle design, and charging infrastructure. This research aims to develop energy-efficient electric vehicles that can meet city transportation needs. This research focuses on several aspects, namely: Lightweight and aerodynamic vehicle design: This design can reduce energy consumption and increase vehicle efficiency. Efficient propulsion system: An efficient propulsion system can increase mileage and reduce exhaust emissions. Advanced battery technology: Advanced battery technology can increase energy density and battery life. It is hoped that the results of this research will produce energy-efficient electric vehicles that are environmentally friendly and can help reduce air pollution in big cities.

Permintaan E-motor yang fluktuatif menyebabkan produksi tidak optimal. Diketahui permasalahan yang terjadi pada perushaan mengalami kesulitan mencapai target produksi perbulannya, bulan September 2022-September 2023 total dalam satu tahun target perusahaan yaitu sebesar 6405 unit dan pada proses produksi hanya dihasilkan sebesar 6026 unit, sehingga dapat diketahui kurang lebih sekitar 4% produk tidak terlaksana dalam proses produksinya. Untuk mengetahui penyebab tidak tercapainya produksi perlu dilakukan pengamatan dilapangan terhadap faktor-faktor yang dapat mempengaruhinya. Metode OMAX dapat memberikan perbaikan menuju peningkatan produktivitas di masa yang akan datang dari hasil pengukuran yang didapatkan.  Kriteria yang paling mempengaruhi produktivitas adalah kriteria bahan baku sebesar 113, tenaga keerja sebesar 42, jam kerja sebesar 48 dan energi listrik sebesar 49. Hasil dari indeks produktivitas pada bulan Oktober 2022-September 2023 adalah yaitu sebesar 4.3 (cukup), namun perlu dievaluasi dan ditingkatkan. Usulan perbaikan yang perlu dilakukan perusahaan berdasarkan nilai skor paling rendah yaitu rasio 2 atau tenaga kerja yang mana perlu dilakukan analisis menggunakan Fault Tree Analysis didapatkan 6 basic event diantaranya penetapan regulasi lembur, membuat peraturan tata tertib perusahaan secara rinci, peninjauan dan penempatan serta evaluasi tenaga kerja, perancangan pelatihan (training), inspeksi dalam waktu tertentu serta mengevaluasi  ulang tenaga kerja sesuai keterampilan yang dimiliki. Tujuan dari penelitian ini yaitu untuk mengetahui input apa saja yang berpengaruh pada rendahnya produktivitas serta memberikan perbaikan untuk meningkatkan produktivitas pada perusahaan.