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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains JET (Journal of Electrical Technology) Jurnal Surya Teknika Tadulako Master Law Journal Jurnal Riset Teknologi Pencegahan Pencemaran Industri Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Bhakti Nagori (Jurnal Pengabdian kepada Masyarakat) SAINSTEK BATOBO: Jurnal Pengabdian Kepada Masyarakat
Romy Romy
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Other

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Analisis Exergoeconomic Pembangkit Listrik Tenaga Uap (PLTU) Dual Fuel Line 2 PT Riau Andalan Pulp And Paper (RAPP) 100 MW Pangkalan Kerinci Binsar Martua Parulian Manurung; Romy Romy; Awaludin Martin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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

Abstract

The dual fuel line 2 100MW steam power plant (PLTU) is one of the power plants owned by PT Riau Andalan Pulp and Paper. To produce steam PLTU line 2, PT RAPP used biomass as the main fuel and natural gas as an alternative fuel to achieve the required steam production target. The combination of exergy analysis (second law of thermodinamics) with economic analysis is exergoeconomic. With this exergoeconomic analysis the value of losses in each component of the steam power plant is more noticeable because it is already in the value of the currency. By carrying out this research the value of the cost of loss can be identified specifically, from the highest loss to the lowest loss. At the dual fuel line 2 PT RAPP 100MW steam power plant the biggest cost of the loss was at the boiler at US$ 533.048,48/hour, followed by the HP pre-heater 2 for US$ 262.869,97/hour, the HP pre-heater 1 for US$ 83.153,52/hour, condenser US$44.063,03/hour, pump 2 US$42.846,85/hour, feedwater tank US$34.849,08/hour, steam turbine US$234.05/hour and the smallest was pump 1 US$71,48/hour. With a total value of a loss of US$ 1.011.509,52/hour. Through this research, it was expected that the value of the cost of losses due to exergy destruction can be reduced. Keyword: Pembangkit Listrik Tenaga Uap, Exergy, Exergoeconomic
Pengaruh Geometri Basin Terhadap Aliran Vortex: Kajian pada Basin Conical, Conical Convex dan Silinder dengan CFD Kurniawan, Iwan; Heri Siswanto; Yohanes, Yohanes; Romy, Romy; Amir Hamzah
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7187

Abstract

This study aims to evaluate the influence of basin geometry on the formation and characteristics of vortex flow using Computational Fluid Dynamics (CFD). Three types of basin geometries were investigated: cylindrical, conical, and conical convex. CFD simulations were conducted to observe the velocity distribution, and vortex flow patterns generated by each basin. The results indicate that the conical basin produces vortex flows with higher intensity compared to the cylindrical and conical convex basins. The conical basin demonstrated a more focused flow pattern and higher vortex concentration around the central axis, contributing to enhanced vortex formation efficiency. Although the cylindrical and conical convex basins also generated vortex flows, they exhibited a more dispersed velocity distribution and less stable vortices. These findings provide important insights for the design and optimization of vortex turbine systems, particularly in the context of renewable energy applications.
Optimalisasi Pencahayaan Pada Ruangan Perumahan PT Pertamina (Persero) RUII Production Dumai Menggunakan Logika Fuzzy Suwitno, Suwitno; Winanda, Muhammad Valdi; Ali, Nurhalim Dani; Rosma, Iswadi Hasyim; Romy, Romy
JET (Journal of Electrical Technology) Vol 9, No 3 (2024): Edisi Oktober
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/jet.v9i3.10579

Abstract

Pencahayaan ruangan yang dijadikan objek penelitian adalah pencahayaan pada perumahan PT Pertamina (Persero) RU II ProductionDumai. Perumahan ini sebagian besar merupakan ruangan yang digunakan untuk keluarga. Penentuan pencahayaan ruangan pada ruangan-ruangan tersebut saat ini masih dilakukan secara objektif, belum terdapat perhitungan yang jelas dalam penentuan tingkat pecahayaannya. Penelitian ini dilakukan untuk mengetahui tingkat optimalisasi sistem pencahayaan ruangan kondisi eksisting dan melakukan upaya perbaikan untuk menuju sistem pencahayaan ruangan kondisi ideal. Upaya untuk menuju kondisi ideal tersebut adalah dengan melakukan pengukuran, perhitungan dan analisa terhadap tingkat pencahayaan, daya lampu total, biaya investasi dan biaya pemakaian listrik dengan menggunakan metoda logika fuzzy. Untuk validasi data digunakan software Matlab. Pada kondisi eksisting seluruh ruangan masih terbilang kurang baik, dengan nilai lux < 50 lux dan optimasi 60%, sehingga berdampak baik karena telah mencapai tingkat pencahayaan minimum masing-masing ruangan berdasarkan fungsi ruangan yang telah direkomendasikan sesuai dengan SNI 03-6575-2011 yaitu ruang tamu dengan lux 200 atau ruang kamar tidur 150 lux.
Experimental Analysis of Conical Basin Models with Vortex Turbines for Small-Scale Renewable Energy Generation Kurniawan, Iwan; Romy, Romy; Hamzah, Amir; Farhan, A
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 69 No 1 (2025): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v69i1.530

Abstract

This study investigates the performance of Gravitational Water Vortex Turbines (GWVT) using different conical basin configurations, focusing on the impact of vane designs on turbine efficiency. Four basin models were tested: model A (no vanes), Model B (180-degree vanes), Model C (90-degree vanes), and Model D (45-degree vanes). The basin was constructed from resin mixed with fiber, with the addition of vanes designed in various configurations to enhance vortex formation and energy extraction. Experimental testing was conducted under varying load conditions, with efficiency determined by the ratio of the potential energy of the water to the mechanical energy generated by the turbine. The results showed a significant improvement in efficiency with the introduction of vanes. Model B, featuring 180-degree vanes, demonstrates the highest efficiency, achieving an increase of up to 17.08% compared to the base model (Model A). Model C, with 90-degree vanes, and Model D, with 45-degree vanes, show efficiency increases of 14.56% and 12.08%, respectively. These results imply that the design and arrangement of vanes are essential in enhancing vortex formation and turbine performance.
Pembuatan Water Filter untuk Meningkatkan Kualitas Air Sumur Bor pada SDN 92 Pekanbaru Romy; Martin, Awaludin; Nawangsari, Putri; Huda, Feblil; Masnur, Dedy
BATOBO: Jurnal Pengabdian Kepada Masyarakat Vol 3 No 1: BATOBO: Juni 2025
Publisher : Jurusan Teknik Elektro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/batobo.3.1.40-48

Abstract

SDN 92 Pekanbaru berlokasi di Jl. Patin No. 80 Kelurahan Umban Sari, Kecamatan Rumbai, Kota Pekanbaru. Pengelola sekolah menghadapi permasalahan ketersediaan air bersih dan sehat sesuai persyaratan kualitas air bersih yang distandarkan PERMENKES No.416/MENKES/PER/IX/1990. Sumber air pada SDN 92 Pekanbaru diperoleh dari sumur bor, namun kondisi air yang digunakan untuk keperluan di kamar mandi siswa dan guru saat ini masih kurang sehat. Air yang digunakan mengandung besi, hal ini dapat ditunjukkan dari menempelnya karat pada bak penampung air. Solusi yang dapat ditawarkan adalah menggunakan proses penyaringan. Penyaringan dilakukan menggunakan media berpori berupa pasir atau kombinasi dari pasir aktif, zeolit, karbon aktif dan lainnya. Media tersebut ditempatkan dalam pipa fiber diameter 8 inchi. Pembuatan dan pemasangan penyaring air di SDN 92 Pekanbaru telah menghasilkan air bersih dengan kriteria tidak berbau dan tanpa melalui proses pengendapan. Air yang dihasilkan saat ini tidak berwarna dan berdasarkan hasil pengujian dengan TDS (Total Dissolved Solids) meter diketahui nilai TDS hasil penyaring bernilai 15. Kondisi ini memenuhi syarat kesehatan air bersih yang telah ditetapkan pada PERMENKES No.416/ MENKES /PER/IX/1990.
Analysis of Three Phase Induction Motor Supplied by SVPWM Inverter for Electric Bike Application Hamzah, Amir; Suwitno, Suwitno; Romy, Romy; Hutabalian, Ronaldi
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 36 No 1 (2016): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v36i1.400

Abstract

Electric drive on an electric bike, consist of electric motor, power converter and electronic controller. These are the mover of electric vehicle system. This paper discussed the three-phase inverter with Space Vector Pulse Width Modulation (SVPWM) method as a three-phase induction motor drive in electric bike application. The discussed that are modeled by using MATLAB/SIMULINK. The purpose of this paper is to get the analysis of the three-phase inverter SVPWM as a three-phase induction motor drive with specification 500 W, 50 V, 50 Hz and 8 poles. Converter using a battery with a voltage 48 V. Before the battery voltage is converted by an inverter, battery voltage was increased through a boost converter up to 70.62 V. Through simulation with MATLAB software was obtained curve of sinusoidal voltage, current, and speed of the motor by SVPWM controlled system. In this paper also tested against changes in the value of the fundamental frequency inverter. Test results show that the inverter can be set the speed of the motor at a frequency of 20 Hz to 50 Hz. Electric drive on an electric bikes, consist of electric motor, power converter and electronic controller. These are the mover of electric vehicle systems. This paper discussed the three-phase induction motor supplied by Space Vector Pulse Width Modulation (SVPWM) inverter. They discussed that are modeled by using MATLAB/SIMULINK. The purpose of this paper is to get the analysis of the three-phase inverter SVPWM as a three-phase induction motor drive with specification 500 W, 50 V, 50 Hz and 8 poles. Converter using a battery with a voltage 48 V .
Desain Pemantauan Energi Surya Real Time Berbasis Arduino Cloud Suwitno, Suwitno; Hutabarat, Bijujent; Ali, Nurhalim Dani Ali; Rosma, Iswadi Hasyim; Romy; Azni, Anisa Yulvi
SAINSTEK Vol. 13 No. 1 (2025)
Publisher : Sekolah Tinggi Teknologi Pekanbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35583/js.v13i1.307

Abstract

Saat ini, panel surya merupakan salah satu sumber energi terbarukan yang paling banyak digunakan dalam beberapa tahun terakhir. Panel surya berfungsi untuk mengubah radiasi sinar matahari menjadi energi listrik melalui proses fotovoltaik, yang menghasilkan arus searah (DC). Namun, panel surya memiliki sejumlah keterbatasan, sehingga pemantauan kinerja sistem fotovoltaik (PV) secara efektif menjadi aspek penting dalam pemanfaatan energi matahari. Berdasarkan hal tersebut, diperlukan perancangan sistem pemantauan panel surya yang efektif. Sistem ini mencakup pengukuran tegangan DC dan AC pada panel surya serta konverter, arus DC dan AC pada inverter, faktor daya (cos q), frekuensi, dan intensitas energi matahari. Dalam tulisan ini, sistem pemantauan yang dirancang melibatkan penggunaan rangkaian pembagi tegangan, sensor arus ACS712, rangkaian detektor titik nol, rangkaian pembeda fasa, ESP8266, Arduino, LCD 20x4, dan penyimpanan berbasis cloud. Energi total yang tercatat dari panel surya selama 12 jam pengamatan adalah sebesar 42,68 Wh. Setiap pengujian yang dilakukan menunjukkan bahwa sensor memiliki tingkat kesalahan rata-rata yang lebih kecil atau sama dengan 3,2%, dengan kecepatan pemrosesan data yang memerlukan waktu sekitar 4 hingga 5 detik untuk menghasilkan satu data pemantauan. Penyimpanan berbasis cloud sangat membantu dalam menyimpan data dalam jumlah besar dan memungkinkan pemantauan jarak jauh secara real-time.
Analisis Energi Gas Engine Siklus Otto Kapasitas 835 KW Syaifudin, Ahmad; Romy, Romy; Martin, Awaludin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Biogas from Palm Oil Mill Effluent (POME) is one of renewable energy resources that can be used to reduce theuse of fossil energy in satisfying the electricity needs. At biogas power plant, gas engine is an importantcomponent which functions to convert the energy contained biogas into mechanical energy to drive the electricgenerator. Because of its important function, the performance of the gas engine needs to be maintained in orderto remain well operated. In addition to maintaining the performance of gas engine, steps in improving theefficiency of gas engine energy usage also need to be done in order to become more efficient. Efficiency of thegas engine depends on the overall efficiency of cylinders gas engine in order to convert the energy of fuel intowork. Energy analysis is needed to know the efficiency of multi-cylinder gas engine at biogas power plant, so itcan be known the gas engine performance and can be used for further analysis in increasing the efficiency of theuse of renewable energy sources (biogas) in gas engine. The purpose of this research was to know the energy orthermal efficiency of gas engine. Variables used in the analysis were a composition of biogas, flow rate ofbiogas, a temperature of gas mixture entering the gas engine and temperature of exhaust gas. The energyanalysis result showed that the efficiency of all cylinders varies and the greatest energy or thermal efficiency ofgas engine is on 5th and 10th cylinder (56.29%) and lowest in 8th cylinder (56.17%). The average energy orthermal efficiency of gas engine is 56.23%.Keyword : Biogas, Biogas Power Plant, Gas Engine, Otto Cycle, Energy Analysis
Optimization of Injection Pressure and Fuel Temperature in a Diesel Engine Using Biodiesel B40 Romy, Romy; Suwitno, Suwitno; Ginting, Yogie Rinaldi; Sembiring, Ferdinandus Extranta
Jurnal Riset Teknologi Pencegahan Pencemaran Industri Vol. 15 No. 1 (2024): May
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Pencegahan Pencemaran Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21771/jrtppi.2024.v15.no1.p1-9

Abstract

Biodiesel is an alternative fuel substitute for diesel engines produced from vegetable or animal oil through the transesterification reaction process between fatty acid, methanol, and catalyst. However, in its use in diesel engines, there is a decrease in engine performance. This is partly due to the higher viscosity value compared to diesel. Some ways to improve engine performance using biodiesel include adjusting injection pressure and increasing fuel inlet temperature. This study aimed to determine the effect of adding injection pressure and fuel inlet temperature on the performance of diesel engines using B40, such as power, thermal efficiency, sfc, and AFR. This study used a 1-cylinder diesel engine with constant rotation, using five variations of injection pressure 110-150 bar with a 10 bar interval, and five variations of fuel inlet temperature 30˚C-70˚C with a 10˚C intervals, and five loads from 5,000 kg/m2 to 25,000 kg/m2 with a 5000 kg/m2 interval. Testing and data processing were done using the Taguchi method. The results showed that the best diesel engine performance occurred at an injection pressure of 150 bar and a fuel temperature of 60˚C. The predicted performance value achieved under optimal conditions is a power of 2.9 kW at a load of 25000 kg/m2, thermal efficiency of 69.92% at a load of 25000 kg/m2, sfc of 3 x10-5 kg/kJ at a load of 25000 kg/m2, and AFR of 169.23 at a load of 5000 kg/m2. Temperature significantly affects engine performance power, sfc, thermal efficiency, and AFR compared to injection pressure.
PENERAPAN SISTEM KEUANGAN BERBASIS CLOUD COMPUTING DI PONDOK PESANTREN KHAIRUL UMMAH 2 PEKANBARU : PKM Suwitno, Suwitno; Jatwoko, Jatwoko; Ali, Nurhalim Dani; Rosma, Iswadi Hasyim; Romy, Romy; Azni, Anisa Yulvi; Marpaung, Noveri Lysbetti
BHAKTI NAGORI (Jurnal Pengabdian kepada Masyarakat) Vol. 5 No. 1 (2025): BHAKTI NAGORI (Jurnal Pengabdian kepada Masyarakat) Juni 2025
Publisher : LPPM UNIKS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/bhakti_nagori.v5i1.4449

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan efisiensi dan akuntabilitas dalam pengelolaan keuangan lembaga pendidikan berbasis pesantren melalui pengembangan dan penerapan sistem informasi keuangan berbasis cloud. Aplikasi yang dikembangkan memanfaatkan bahasa pemrograman PHP dan sistem manajemen basis data MySQL, yang diintegrasikan pada layanan cloud agar dapat diakses dengan mudah melalui jaringan internet. Penerapan sistem ini dilakukan di Ponpes Khairul Ummah 2 Pekanbaru sebagai bentuk kontribusi teknologi dalam mendukung tata kelola keuangan yang lebih modern dan transparan. Proses pengembangan meliputi instalasi komponen back-end, perancangan dan pengaturan basis data, serta integrasi sistem ke dalam domain dan layanan hosting milik pesantren. Kegiatan ini mengangkat tema: “Penerapan Sistem Keuangan Berbasis Cloud Computing di Pondok Pesantren Khairul Ummah 2 Pekanbaru.” Lingkup pelaksanaan mencakup tiga aspek utama, yaitu: (1) implementasi antarmuka aplikasi dan integrasi basis data ke dalam sistem hosting, (2) konfigurasi serta aktivasi fitur-fitur aplikasi yang mencakup pencatatan transaksi, kas masuk, kas keluar, dan laporan keuangan, dan (3) pengisian data awal serta parameter operasional sesuai kebutuhan lembaga. Hasil dari kegiatan ini menunjukkan bahwa penggunaan sistem berbasis cloud tidak hanya mempermudah pencatatan transaksi keuangan harian, tetapi juga memberikan dampak positif dalam meningkatkan transparansi dan akuntabilitas keuangan pesantren. Dengan demikian, penerapan teknologi informasi ini diharapkan dapat menjadi solusi efektif dalam manajemen keuangan lembaga pendidikan berbasis keagamaan di era digital.
Co-Authors Ahmad Hasnul Fajri Arsyah Ahmad Nur Rokman Ahmad Syaifudin Ali, Nurhalim Dani Ali, Nurhalim Dani Ali Amir Hamzah Amir Hamzah Anak Agung Gede Sugianthara Anisa Yulvi Azni Anita Susilawati Aris Freddy Atikah Purwantari Awaludin Martin Binsar Martua Parulian Manurung Dedy Masnur, Dedy Dian Putra Satria Farhan, A Feblil Huda Ginting, Yogie Rinaldi Halal Putra Purba Hendinto Simanihuruk Hendri Manogu Pranata Sitanggang, Hendri Manogu Pranata Heri Siswanto Hutabalian, Ronaldi Hutabarat, Bijujent Irwandi Trinov Iwan Kurniawan Jatwoko, Jatwoko Laksono Trisnantoro Lehet Rikardo Pandiangan Mitrodono H L Gaol Muhammad Razak Tuara Nazaruddin Nazaruddin Noveri Lysbetti M Nurjaman, Jajang Putri Nawangsari, Putri Risnawati, Kinkin Rosma, Iswadi Hasyim Samuel Siregar Sembiring, Ferdinandus Extranta Suwitno Suwitno, Suwitno Teddi Febriardi Mulia Walter Valentino Sinaga Winanda, Muhammad Valdi Yohanes Yohanes Yohanes Yohanes Z Zulfansyah Zuchra Helwani