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All Journal Angkasa: Jurnal Ilmiah Bidang Teknologi Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Rekayasa, Teknologi, dan Sains Electrician : Jurnal Rekayasa dan Teknologi Elektro JEECS (Journal of Electrical Engineering and Computer Sciences) Journal of Electrical Engineering and Informatics (JEEI)
Novia Utami Putri
Politeknik Negeri Lampung
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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PELATIHAN DAN EVALUASI PENGGUNAAN TRAINER HYBRID EBT TERHADAP PENINGKATAN KOMPETENSI SISWA TEKNIK INSTALASI TENAGA LISTRIK (TITL) DI SMKN 1 MERBAU MATARAM Novia Utami Putri; Agus Apriyanto; Fauzi Ibrahim; Retno Wahyudi; Alexander Sembiring; Adam Wisnu Murti; Syaiful Mansur; Ilham Saputra
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 9, No 5 (2026): MARTABE : JURNAL PENGABDIAN MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v9i5.2059-2065

Abstract

Pendidikan vokasi menuntut ketersediaan sarana praktik yang relevan dengan kebutuhan industri, namun SMKN 1 Merbau Mataram menghadapi kendala keterbatasan fasilitas praktik Energi Baru Terbarukan (EBT) yang menghambat pemahaman siswa secara komprehensif. Pengabdian ini bertujuan untuk mengevaluasi efektivitas pelatihan dan penerapan media pembelajaran Trainer Hybrid EBT (PLTS dan PLTB) dalam meningkatkan kompetensi siswa jurusan Teknik Instalasi Tenaga Listrik (TITL). Metode pelaksanaan dilakukan menggunakan pendekatan partisipatif melalui lima tahapan terstruktur: sosialisasi, pelatihan, penerapan teknologi, pendampingan dan evaluasi, serta keberlanjutan program. Intervensi ini menggunakan alat peraga terintegrasi panel surya 10 Wp dan turbin angin 500 W untuk mensimulasikan sistem hibrida secara nyata. Hasil evaluasi menunjukkan peningkatan signifikan pada pemahaman teknis siswa, mencapai persentase pemahaman 98% setelah pelaksanaan pelatihan. Program ini terbukti efektif menjembatani kesenjangan antara teori dan praktik, serta mendukung kemandirian sekolah dalam menyelenggarakan pembelajaran berbasis energi hijau
Performance Analysis of Electric Bicycles with Planetary BLDC Motors under Different Rider Weights Hegen Persada; Ernando Rizki Dalimunthe; Fika Trisnawati; Novia Utami Putri
JEECS (Journal of Electrical Engineering and Computer Sciences) Vol. 10 No. 2 (2025): December
Publisher : Fakultas Teknik Universitas Bhayangkara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54732/jeecs.v10i2.9

Abstract

Electric bicycles are increasingly used as eco-friendly personal transportation due to their efficiency and low emissions. This study analyzes the effect of rider weight on the energy consumption of a 48V 14Ah lithium-ion battery in an electric bicycle equipped with a 500W planetary BLDC motor. Tests were carried out on three rider weight categories: 60–65 kg, 70–75 kg, and 80–85 kg, to evaluate their impact on current consumption, travel distance, and operating duration. Measurements were taken using a PZEM-015 sensor to monitor voltage, current, and battery capacity in real-time, while speed and distance data were recorded through the Strava application. The results show that as the rider’s weight increases, the average current consumption also rises, decreasing both distance and travel time in a nearly linear pattern. At 60 kg, the bicycle traveled 24.32 km with an average current of 9.52 A, while at 80 kg, the distance decreased to 19.76 km with an average current of 23.15 A. The findings indicate that rider weight significantly affects electric bicycles' performance and energy efficiency. Heavier riders require greater battery power, shorter travel range, and reduced operational efficiency.
Analisis Kinerja Komprehensive Sistem Pendingin Primer terhadap Efisiensi Pembangkit Listrik Tenaga Panas Bumi Tipe Flash Steam Agus Apriyanto; Novia Utami Putri; Retno Wahyudi; Alexander Sembiring; Fauzi Ibrahim; Adam Wisnu Murti
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 19 No. 3 (2025)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v19n3.2855

Abstract

Abstract. Geothermal power plants rely heavily on the efficiency of their cooling systems to optimize overall energy conversion. This study investigates the performance of the primary cooling systems, namely direct contact condensers and mechanically induced flow cooling towers in Unit 3 of PT. Pertamina Geothermal Energy Tbk, Ulubelu Area, Lampung. Performance metrics are assessed using parameters such as range, approach, and effectiveness for the cooling tower, and thermal efficiency calculations for the condenser and steam turbine. Daily operational data were collected and analyzed. The results show that fluctuations in cooling tower effectiveness significantly affect condenser vacuum and turbine efficiency. The average actual cooling tower effectiveness is 70.06%, lower than the design effectiveness of 78%. The condenser shows an average thermal efficiency of 93.80%, with effectiveness variations between 83.23% to 86.44%. The turbine efficiency based on design is 87.51%, while the actual efficiency drops to the range of 81.84% to 82.48%. This decrease indicates a performance degradation of approximately 0.94% per year. This finding underlines the important role of cooling system optimization in improving the performance of geothermal power plants.
Smart Lab Energy – For Real-Time Electricity Consumption Monitoring In The Electronics Engineering Technology Laboratory, Polytechnic State Of Lampung Tomy Pratama Zuhelmi; Novia Utami Putri; Ayu Sintianingrum; Syaiful Mansur; Ernando Rizki; Amanda Putri Denizka; Altino Adni Riyadi
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 20 No. 1 (2026)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v20n1.2970

Abstract

This study aims to design and implement an Internet of Things (IoT)-based electrical energy monitoring system capable of displaying real-time data in a vocational education laboratory environment. The developed system utilises an ESP32 microcontroller and a PZEM-004T sensor to accurately measure voltage, current, power, and energy parameters. The measurement data are transmitted to a cloud server and visualised through a digital dashboard, allowing users to monitor and analyse energy usage easily. The test results show that the system performs well and produces consistent data compared to manual measurements using a digital clamp meter. The implementation of this system has the potential to improve energy efficiency, reduce power waste, and support the application of a green campus concept in higher education institutions. Moreover, this system can be used as a project-based learning medium to enhance students’ competencies in embedded systems, sensors, and IoT-based automation.
EDUKASI PEMANFAATAN LIMBAH DAN HEMAT ENERGI BERBASIS PRODUK ECO-FRIENDLY PADA KELOMPOK IBU-IBU PKK PESISIR SELATAN Novia Utami Putri; Faizatin Nadya Roza; Dian Pratiwi; Cut Syarifa Thursina4; Adam Wisnu Murti; Kholilulloh Kholilulloh; Samuel Rudolf Simanjuntak; Zahia Sabrina Putri; Galih Laka Siwi; Alma Pratiwi
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 9, No 9 (2026): MARTABE : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v9i9.3631-3636

Abstract

Kegiatan Pengabdian kepada Masyarakat (PKM) ini bertujuan untuk mengeskalasi kapasitas literasi, keterampilan teknis, serta kesadaran ekologis Kelompok Ibu-Ibu PKK Pesisir Selatan melalui program "JELITA" (Jelantah Jadi Lilin Aromaterapi) yang diintegrasikan dengan edukasi hemat energi berbasis produk eco-friendly. Permasalahan utama mitra adalah potensi akumulasi limbah minyak jelantah sebesar 10–20 liter per minggu serta rendahnya pemahaman mengenai konservasi energi rumah tangga. Metode pelaksanaan menerapkan kombinasi pendekatan institusional dan partisipatif (participatory approach) melalui tahapan survei, sosialisasi, pelatihan praktik pembuatan lilin (hands-on practice), serta evaluasi. Hasil evaluasi efektivitas program yang diukur menggunakan instrumen kuesioner skala Likert (pre-test dan post-test) menunjukkan adanya peningkatan signifikan pada pemahaman dan keterampilan peserta, dari 14% sebelum pelatihan menjadi 86% setelah pelatihan. Program ini terbukti efektif memberikan solusi konversi limbah bernilai tambah (value-added products) sekaligus mendorong adopsi perilaku hemat energi melalui pemanfaatan lilin sebagai penerangan alternatif ramah lingkungan di ranah domestik
Digital Twin-Based Prediction of Engine Thermal Behavior and Emission Characteristics Under Variable ECU Calibration Strategies Retno Wahyudi; Agus Apriyanto; Novia Utami Putri; Fauzi Ibrahim; Alexander Sembiring; Adam Wisnu Murti
Jurnal Rekayasa Teknologi dan sains Vol 10, No 2 (2026): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v10i2.27574

Abstract

ABSTRACT Contemporary engine development programmes face an intensifying conflict between compressed time-to-market schedules, escalating computational demands of high-fidelity simulation, and the exponentially growing dimensionality of the electronic control unit (ECU) calibration space in modern internal combustion engines. This article presents a novel digital twin (DT) framework capable of predicting engine thermal behaviour and exhaust emission characteristics in real time across variable ECU calibration strategies, without requiring a physical engine to be operated at every calibration point of interest. The proposed framework integrates a physics-informed neural network (PINN) thermal model of the engine cooling circuit and combustion chamber wall with a long short-term memory (LSTM) recurrent network trained on high-resolution in-cylinder pressure traces and exhaust emission measurements acquired from a production four-cylinder turbocharged gasoline direct injection (TGDI) engine. The PINN layer enforces energy conservation constraints during network training, ensuring thermodynamic consistency of predictions even in interpolated regions of the calibration space that were not represented in the training dataset. Across a validation set spanning 420 distinct ECU calibration points—varying ignition advance, fuel injection pressure, injection split ratio, boost pressure, and exhaust gas recirculation (EGR) rate—the digital twin predicted coolant outlet temperature with a root-mean-square error (RMSE) of 1.43°C, indicated thermal efficiency with RMSE of 0.61%, brake-specific CO with RMSE of 3.82 g/kWh, brake-specific NOx with RMSE of 2.74 g/kWh, and total hydrocarbon (THC) emissions with RMSE of 1.96 g/kWh. Particulate number (PN) prediction achieved an RMSE of 6.3 × 10⁵ #/cm³ relative to measured values. Real-time inference latency averaged 4.7 ms per operating point on standard automotive-grade embedded hardware, enabling integration into hardware-in-the-loop (HIL) and model-in-the-loop (MIL) calibration workflows. The framework is shown to reduce the number of physical engine test cell hours required to populate a full-factorial calibration map by 73.6%, while maintaining prediction accuracy within the measurement uncertainty of the physical instrumentation. These results demonstrate that physics-informed digital twins represent a viable and transformative tool for next-generation ECU calibration methodology, with direct implications for achieving simultaneous fuel economy improvement and regulatory emission compliance. Keywords: digital twin, ecu calibration, emission prediction, engine thermal model, hardware-in-the-loop, lstm, physics-informed neural network, turbocharged gdi.
Rancang Bangun Pembangkit Listrik Tenaga Bayu Menggunakan Turbin Archimedes Tiga Sudu untuk Penerangan Unit Bisnis Elka Pranita; Bagus Roudhotul Firdaus; Muhammad Anwar Sadat Faidar; Fika Trisnawati; Sigit Doni Ramdan; Jaka Persada Sembiring; Novia Utami Putri
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 18, No 3 (2026): Agustus
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v18i3.4153

Abstract

Kebutuhan energi listrik di Indonesia terus meningkat, sementara pasokan listrik masih didominasi energi fosil sehingga diperlukan energi alternatif yang berkelanjutan. Salah satu potensinya adalah energi angin melalui PLTB. Penelitian ini bertujuan menganalisis pemanfaatan energi angin di Pantai Gunung Kunyit, Bandar Lampung, menggunakan turbin angin tipe Archimedes yang cocok bekerja pada kecepatan angin rendah. Metode penelitian dilakukan dengan mengukur parameter teknis menggunakan anemometer untuk mengukur kecepatan angin, tachometer untuk mengukur putaran generator, serta multimeter untuk mengukur tegangan dan arus listrik. Metode penelitian dilakukan dengan mengukur kecepatan angin, putaran generator, tegangan, arus, dan daya listrik. Penelitian di lakukan selama 3 hari didapatkan hasil menunjukkan kecepatan angin tertinggi sebesar 6,6 m/s pada hari ke-3 pukul 13.00 WIB menghasilkan putaran generator 277,7 rpm, tegangan 13,93 volt, arus 0,14 Ampere, dan daya 1,95 Watt. Semakin tinggi kecepatan angin, semakin besar daya listrik yang dihasilkan, sehingga turbin Archimedes berpotensi dikembangkan sebagai energi alternatif ramah lingkungan di wilayah pesisir
Ground-Fault Protection Analysis for Electrical Installations in a Multi-Story Office Building Muhammad Solehan; Novia Utami Putri
Journal of Electrical Engineering and Informatics (JEEI) Vol. 1 No. 2 (2026): JUNE (II)
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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

Abstract

Reliable ground-fault protection is essential in multi-story building electrical installations because insulation failure, leakage current, and inadequate grounding may increase the risk of electric shock, fire, and equipment damage. This study evaluates the ground-fault protection system of the One-Stop Service Office Building in Bandar Lampung, Indonesia. Field measurements were conducted at 15 grounding points using the three-point fall-of-potential method with a Kyoritsu 4105A earth resistance tester. The installed residual current devices, locally configured as Earth Leakage Circuit Breakers (ELCBs), were assessed against PUIL 2020, IEC 60364, IEC 60479-1, and IEC 61008-1 requirements. Protection coordination and single line-to-ground fault behavior were further analyzed using ETAP 19.0. The measured grounding resistance ranged from 0.93 Ω to 6.21 Ω, with an average value of 2.56 Ω. Twelve grounding points, or 80% of the measured locations, complied with the 5 Ω maximum limit, whereas G-12, G-14, and G-15 exceeded the standard with values of 5.28 Ω, 5.85 Ω, and 6.21 Ω, respectively. The installed 30 mA ELCBs were suitable for personnel protection; however, type AC devices were still used on circuits supplying non-linear loads such as UPS and variable-frequency drives. Several toilet socket circuits were also found without residual current protection. The ELCB–MCB coordination was selective for low-level leakage currents, although simultaneous operation may occur around 160 A. Corrective actions include installing parallel rod electrodes, applying bentonite-based soil treatment, replacing type AC RCDs with type A devices on non-linear circuits, and implementing six-month preventive testing.
Co-Authors Adam Wisnu Murti Agus Apriyanto Agus Apriyanto Alexander Sembiring Alma Pratiwi Altino Adni Riyadi Amanda Putri Denizka Ayu Sintianingrum Bagus Roudhotul Firdaus Cut Syarifa Thursina4 dian pratiwi Elka Pranita Ernando Rizki Ernando Rizki Dalimunthe Faizatin Nadya Roza Fauzi Ibrahim Fika Trisnawati Galih Laka Siwi Hegen Persada Ilham Saputra Jaka Persada Sembiring Kholilulloh Kholilulloh Muhammad Anwar Sadat Faidar Muhammad Solehan Retno Wahyudi Samuel Rudolf Simanjuntak Sigit Doni Ramdan Syaiful Mansur Tomy Pratama Zuhelmi Zahia Sabrina Putri