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All Journal Jurnal TIMES JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING Jurnal Elektro dan Telkomunikasi Jurnal Engine: Energi, Manufaktur, dan Material Al-Kharaj: Journal of Islamic Economic and Business El-Iqtishady Abdimas: Papua Journal Of Community Service Journal Software, Hardware and Information Technology International Journal of Educational Review, Law And Social Sciences (IJERLAS) Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) AJAD : Jurnal Pengabdian kepada Masyarakat Mauriduna : Journal of Islamic studies Jurnal Nasional Teknologi Komputer International Review of Practical Innovation, Technology and Green Energy (IRPITAGE) Journal of Accounting Research, Utility Finance and Digital Assets (JARUDA) Journal Agroecotech Indonesia (JAI) Jurnal Riset Hukum, Ekonomi Islam, ekonomi, Manajemen dan Akuntansi Jurnal Kreasi Rakyat SABAJAYA Jurnal Pengabdian Kepada Masyarakat International Journal of Economic, Technology and Social Sciences (Injects) GEMBIRA (Pengabdian Kepada Masyarakat) Jurnal Kesehatan Republik Indonesia Jurnal Teknik Elektro dan Komputer Indonesian Journal of Economic & Management Sciences (IJEMS) Jurnal Sains Materi Indonesia INTERACTION: Jurnal Pendidikan Bahasa
Rahmaniar
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Analisis Perbandingan Kinerja Pembangkit Listrik Tenaga Surya dan Pembangkit Listrik Tenaga Uap pada Lingkungan PT. RAPP Satria Darmawan; Rahmaniar; Pristisal Wibowo
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 8 No. 2 (2024)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v8i2.1960

Abstract

This study compares the performance of Solar Power Plants (PLTS) and Steam Power Plants (PLTU) at PT. RAPP. The methods used include daily energy production data collection, environmental observation, and statistical analysis to assess the efficiency and performance of both systems. The analysis reveals that PLTS has high efficiency in converting solar energy into electricity but experiences reduced efficiency due to module PV and inverter malfunctions in Phase 3. Meanwhile, the Dual Fuel Line 2 PLTU achieves a thermal efficiency of 43.24%, with biomass as the primary fuel, which reduces carbon emissions but still requires natural gas for stability. PLTS excels in environmental sustainability and lower operational costs, whereas PLTU offers more stable and substantial production capacity. Recommendations include repairing the PLTS system, expanding the project, investing in technology, and managing PLTU emissions for a more efficient and sustainable energy solution at PT. RAPP.
COMPARATION OF RUBBER MILLING PROCESS TO PRODUCE NATURAL RUBBER COUMPOUNDS USING MODIFIED AND UNMODIFIED LOCAL CLAY FILLER Abu Hasan; Martha Aznury; Indah Purnamasari; Muhammad Zaman; Robert Junaidi; Rahmaniar
Jurnal Sains Materi Indonesia Vol. 21 No. 2 (2020): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

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Abstract

COMPARISON OF RUBBER MILLING PROCESS TO PRODUCE NATURAL RUBBER COMPOUNDS USING MODIFIED AND UNMODIFIED LOCAL CLAY FILLER. Many researchers have studied the effect of modified clay as filler on rubber compounds for both natural rubber and synthetic rubber. Various chemicals are used as clay modifiers. In the rubber milling process, modified clay is directly used as filler after pretreatment with clay modifier. However, clay modifiers can also be milled together with original clay during the rubber mastication and milling process. Thus both of these methods certainly produce different physical properties, so the comparison of the two rubber milling processes is the focus of this research. The analysis of the curing characteristics and physical properties of vulcanized natural rubber was carried out with a rheometer and physical properties test units. Thermal analysis was carried out using TG/DTA and dispersion of filler on the rubber compound was analyzed by SEM. The results of the curing characteristic of the rubber compound and the physical properties of vulcanization showed that there was an effect due to the comparison of the rubber milling process. Modified clay using JH-S69 is better than JH-S69 milled with original clay and vice versa occurs in PEG 4000 which is used as clay modifier. PEG 4000 which is milled together with original clay produces curing characteristic and physical properties of vulcanization better than pretreatment of clay to be modified clay. This analysis is in line with the analysis using SEM.
Pelatihan Pembiayaan Berkelanjutan (Sustainable Finance) untuk Mendorong Pertumbuhan Ekonomi Hijau di Kalangan UMKM Ristati; Zulham; Akhyar, Chairil; Mardhiah, Ainol; Rahmaniar
SABAJAYA Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 02 (2025): SABAJAYA : Jurnal Pengabdian Kepada Masyarakat
Publisher : SABA JAYA PUBLISHER

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Abstract

Pelatihan "Pembiayaan Berkelanjutan untuk Mendorong Pertumbuhan Ekonomi Hijau di Kalangan UMKM" bertujuan untuk meningkatkan pemahaman dan penerapan prinsip-prinsip keuangan berkelanjutan dalam sektor usaha mikro, kecil, dan menengah (UMKM) di Indonesia. Pelatihan ini menggunakan metode kuantitatif dengan desain eksperimen yang melibatkan 60 peserta dari berbagai UMKM. Peserta dibagi menjadi dua kelompok: kelompok eksperimen yang mengikuti pelatihan dan kelompok kontrol yang tidak menerima pelatihan. Data dikumpulkan melalui kuesioner sebelum dan setelah pelatihan untuk mengukur perubahan pengetahuan dan sikap peserta terhadap keuangan berkelanjutan. Hasil dari pelatihan menunjukkan peningkatan signifikan dalam pemahaman peserta mengenai pentingnya keberlanjutan dalam pengelolaan keuangan, serta peningkatan pengetahuan tentang akses ke sumber pembiayaan hijau. Pelatihan ini juga berhasil meningkatkan kapasitas manajerial dan keterampilan peserta, yang esensial untuk penerapan praktik bisnis berkelanjutan. Selain itu, pelatihan menciptakan jejaring antar peserta yang memperkuat kolaborasi di antara UMKM.
PENERAPAN AKAD IJARAH DALAM LEMBAGA KEUANGAN SYARIAH: STUDI KASUS PADA BANK SYARIAH DI INDONESIA Rahmaniar; Rahmah Rafifah Abu; Lince Bulutoding; Saiful Muchlis
El-Iqthisadi Vol 7 No 1 (2025): Juni
Publisher : Jurusan Hukum Ekonomi Syariah Fakultas Syariah dan Hukum Uin Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/el-iqthisady.v7i1.58467

Abstract

Abstrak Penelitian ini bertujuan untuk menganalisis penerapan akad ijarah dalam lembaga keuangan syariah, khususnya pada bank syariah di Indonesia. Akad ijarah merupakan bentuk transaksi sewa-menyewa yang telah disesuaikan dengan prinsip-prinsip syariah. Dalam praktiknya, akad ijarah digunakan pada berbagai produk pembiayaan seperti ijarah muntahiya bittamlik. Penelitian ini menggunakan metode studi kepustakaan dengan mengkaji literatur yang relevan. Hasil kajian menunjukkan bahwa akad ijarah memberikan solusi pembiayaan yang adil dan bebas riba, meskipun dalam implementasinya masih terdapat tantangan seperti pemahaman nasabah yang rendah dan manajemen aset oleh bank. Oleh karena itu, diperlukan peningkatan literasi dan regulasi yang mendukung optimalisasi akad ini dalam sistem perbankan syariah. Kata Kunci: Ijarah, Bank Syariah, Pembiayaan Syariah, Perbankan Islam, Akad Abstract This study aims to analyze the implementation of the ijarah contract in Islamic financial institutions, particularly Islamic banks in Indonesia. Ijarah is a lease-based contract adapted to comply with sharia principles. In practice, it is applied in various financing products, such as ijarah muntahiya bittamlik. This research employs a library research method by reviewing relevant literature. The findings indicate that the ijarah contract offers fair, interest-free financing solutions. However, its implementation still faces challenges, including limited customer understanding and asset management issues by banks. Therefore, improved public literacy and supportive regulations are necessary to optimize the use of ijarah in the Islamic banking system. Keywords: Ijarah, Islamic Bank, Sharia Financing, Islamic Banking, Contract
Analisis Dampak Harmonisa terhadap Efisiensi Energi pada Pengoperasian Inverter Air Conditioner Nofan Rullyanto Tinambunan; Rahmaniar
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.200

Abstract

This research analyzes harmonic characteristics and their impact on energy efficiency in inverter air conditioner operation, as well as evaluates the effectiveness of harmonic mitigation methods. Using a MATLAB/Simulink-based simulation approach, the inverter AC system was modeled under various load levels and operating conditions. Results show that Total Harmonic Distortion (THD) of current is inversely proportional to load level, with the highest THD (30.3%) occurring at 25% load and the lowest (4.5%) at 100% load. Dominant harmonics were identified at orders 3, 5, and 7, contributing significantly to power losses. At low loads, harmonic distortion causes efficiency reduction of up to 10% and decreases the Coefficient of Performance (COP) by approximately 12%. Implementation of passive filters consisting of single-tuned filters for 5th order (250 Hz), 7th order (350 Hz) harmonics, and a high-pass filter for higher-order harmonics (>550 Hz) effectively reduces current THD by 70-80% and harmonic losses by up to 90%, significantly improving system efficiency and COP. The greatest efficiency improvement occurs at low loads, with COP increasing from 9.2 to 10.2 at 25% load. This research provides a foundation for developing power quality standards and more effective harmonic mitigation strategies to enhance energy efficiency in inverter AC systems.
Pengaruh Penggunaan Inverter terhadap Pompa Sirkulasi di PT. Unilever Oleochemical Indonesia Fakhri, Ade; Rahmaniar; Dino Erivianto
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.205

Abstract

Pompa sirkulasi mengalirkan cairan pendingin di dalam sistem pendingin secara terus-menerus untuk menyerap panas dari peralatan-peralatan yang membutuhkan pendinginan pada proses produksi di dove plant. Pengendali kecepatan putar pompa sirkulasi tersebut menggunakan inverter. Metode penelitian yang digunakan adalah metode kuantitatif. Penelitian ini bertujuan untuk menganalisa pengaruh penggunaan inverter terhadap pompa sirkulasi serta melakukan perbandingan pemakaian daya listrik pompa sirkulasi menggunakan inverter dan tanpa inverter. Hasil penelitian menunjukkan jumlah kecepatan putar motor berbanding lurus dengan frekuensi dan daya listrik motor. Perbandingan rata-rata dalam 1 hari pemakaian daya listrik pompa sirkulasi menggunakan inverter sebesar 6,56 kW sedangkan pemakaian daya listrik pompa sirkulasi tanpa inverter sebesar 10,98 kW. Penghematan pemakaian daya listrik yang didapat pompa sirkulasi menggunakan inverter sebesar 4,42 kW per hari. Pemakaian daya listrik pompa sirkulasi yang menggunakan inverter jauh lebih hemat dibandingkan pompa sirkulasi tanpa inverter dikarenakan penggunaan inverter dapat mengatur kecepatan putar motor yang mengakibatkan tegangan keluaran dan arus motor tidak selalu dalam kondisi maksimal dan konstan, sehingga pemakaian daya listrik jauh lebih rendah.
Perencanaan Penerangan Jalan Umum (PJU) Menggunakan Energi Baru dan Terbarukan di Desa Tanjung Gusta, Dusun III, Kecamatan Sunggal Ilyasa Ramadhan; Rahmaniar; Erpandi Dalimunthe
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.217

Abstract

Indonesia has great potential in renewable energy, especially solar energy, due to its geographical location in the tropics. This study aims to plan an efficient and sustainable Street Lighting (PJU) system in Tanjung Gusta Village, Sunggal District, by utilizing new and renewable energy (EBT). Tanjung Gusta Village has a need for adequate street lighting to improve safety, mobility, and quality of life for the community. The research method includes a field survey to analyze conditions, calculation of lighting needs based on applicable standards, and design of a PJU system using EBT. The results of the study indicate that a PJU system with solar power is the most suitable solution for Tanjung Gusta Village, considering the availability of resources. The planning of this solar PJU system includes selecting the type of lamp to be used, determining the capacity of solar panels and batteries, and calculating the optimal layout and height of lamp posts.
Kajian Perencanaan Pembangkit Listrik Tenaga Surya Untuk Budidaya Ikan Mhd. Ilyasa Lubis; Dino Erivianto; Rahmaniar
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.230

Abstract

Sukaraya Village, Pancur Batu District, has great potential in the fisheries cultivation sector. Activities such as aeration and water pumping require reliable and efficient energy sources. Solar Power Plants (PLTS) are a sustainable solution that can overcome these obstacles, considering the abundant availability of sunlight in this area. This study aims to design an optimal PLTS system to support fish farming operations in Sukaraya Village. The design is carried out by considering the power needs of the fisheries system, the potential of solar energy, and the efficiency and reliability of the PLTS components. Based on the research results, the PLTS components consist of 15 pcs of 100 Wp polycrystalline solar panels, a 100 A solar charge controller, 4 12V 150Ah batteries, and an inverter capacity of 7000A. The results of calculations in the PLTS planning can distribute electricity with a load capacity of 5,760Wh. The results of the calculation of the overall cost required in the planning of a solar power plant for fish farming are Rp. 51,912,967
Analisis Pengaruh Beban Peralatan Bengkel Terhadap Intensitas Konsumsi Energi (IKE) Di PT.Buana Jaya Lestari Taufik Refyandra; Rahmaniar; Parlin Hambali
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.234

Abstract

This study analyzes the Energy Consumption Intensity (ECI) at the multi-story motorcycle workshop of PT. Buana Jaya Lestari in Medan to identify energy consumption characteristics and optimization potential. The research method used energy audits, direct measurements, and historical energy consumption data analysis over a 12-month period. The research object is a multi-story workshop with a total area of 1,850 m² distributed across three floors with different functions. The results of the study show a total ECI of 100.67 kWh/m²/year, which meets the national standard for commercial buildings with partial air conditioning. Energy consumption distribution per floor varies significantly: floor 1 (138.09 kWh/m²/year), floor 2 (99.84 kWh/m²/year), and floor 3 (48.00 kWh/m²/year). The air conditioning system dominates energy consumption with a contribution of 42.1%, followed by the lighting system (23.9%), workshop equipment (20.0%), and support systems (14.0%). The most influential factors are external ambient temperature (correlation 0.85) and the number of vehicles served (correlation 0.78). Energy savings potential reaches 13.4% or 24,878 kWh/year through optimization of the air conditioning system and retrofitting of the lighting system. Implementing energy conservation strategies can result in financial savings of Rp 37,317,000/year, a reduction in CO₂ emissions of 17.41 tons CO₂eq/year, and a decrease in the Energy Performance Index (EPI) to 87.25 kWh/m²/year.
ANALISIS PENGUJIAN KAPASITAS BATERAI 220 VDC UNTUK KEANDALAN PLTGU UNIT PEMBANGKITAN (UP) BELAWAN Wahyu Desmandra; Dino Erivianto; Rahmaniar
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.248

Abstract

This study aims to analyze the capacity of a 220 VDC battery used in the acoustic system of the Gas and Steam Power Plant (PLTGU) at the Belawan Generating Unit (UP). Batteries have an important role as a backup energy source in maintaining the continuity of the electrical operational system, especially in emergency conditions. The research method includes testing the battery capacity by measuring current, voltage, and discharge time under various load conditions. The test results show that battery capacity can vary depending on temperature, age, and previous charging conditions. The data obtained are explained to rotate the battery performance in supporting the PLTGU system. This conclusion provides recommendations for routine maintenance and battery replacement, to ensure the electrical system at the Belawan UP continues to function optimally. This research is expected to be a reference for PLTGU managers in improving the efficiency of the power plant system.
Co-Authors Abu Hasan Adi Sastra Pengalaman Tarigan Aditya Adnan Ahmad Dani Aisah Akhyar, Chairil Amru Usman Aprida Hanum Arliansyah Arnela Nur Bahri, Halida budi hartono Chalirafi Cut Dhea Fidela Edison Emelia Fitri Limchio Sinaga Erna Isfayani Ernawati Jassin, Ernawati Erpandi Dalimunthe Eva Ayuzar Fakhri, Ade Falahuddin Farhan Kandarifa Fayza Yovania Br Sembiring Feri Karyanta Bangun Fidya Amira Nasution Fitrian Rizky Fuad, Raja Nasrul Fuadi Hamdiah Haris Gunawan Hartati Bahar Heriyana Ikramuddin, Ikramuddin Ilham Ahmad Ilyasa Ramadhan INDAH PURNAMASARI Isfayani, Erna Jamaluddin Majid Jamil, Afwan Jullimursyida Kamrin Khadijah Vanny Khairawati Khairil Anwar Khairina AR Likdanawati Lince Bulutoding Lisnawati M. Subhan Mardhiah, Ainol Mariyudi Martha Aznury Maryudi Mhd Rizki Syahputra Mhd. Ilyasa Lubis Mita Darmayanti Mohd Heikal MUCHSIN Mufid, M. Nuzul Muhammad Ade Hendarso Muhammad Zaman Mustakim Muchlis Naufal Bachri, Naufal Nia Kurniawati Nofan Rullyanto Tinambunan Nur Faliza Nurainun Nurazizah Parlin Hambali Pristisal Wibowo Puja Ramadhani Putri Faradila Radha Chitta Vritti Rafifah Abu, Rahmah Rahmah Rafifah Abu Rahman Ambo Masse Ratna Wilis Razali, Ramadhan Rico Nur Ilham Ridwan, Wahyu Ristati Rizaldy, Adhy Robert Junaidi Rosa Zachrul Phonna Rudi Maulana Rusydi Said Abdillah Saiful Bahgia Saiful Muchlis Saleh, Firman Samsul Bahri Sapna Biby Satria Darmawan Suriani Sutriani Syahbudin Syahbudin, Syahbudin Syamsul Bahri Syifa Thahira Yusral T. Edyansyah, T. Edyansyah Talita Ainun Nursalsabillah C Taufik Refyandra Trio Putra Agung Wijaya Wahyu Desmandra Wahyu Fuadi Wahyuddin Widia Kamisah M Br Tinambunan Widyana Verawati Siregar Widyana Verawaty Siregar Yulis Sayang Zulham Zulkifli Surahmat Zuraidah Tharo