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Unjuk Kerja Kincir Air Sudu Lengkung Yang Bekerja Pada Saluran Horizontal Boli, Rahmad Hidayat; Makhsud, Abdul; Mahmudin, Mahmuddin
Majamecha Vol. 3 No. 1 (2021): Majamecha
Publisher : Program Studi Teknik Mesin, Fakultas Teknik, Universitas Islam Majapahit, Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamecha.v3i1.1092

Kincir air bentuk sudu Lengkung dengan diameter kincir 1,000 m, panjang sudu 0,25 m, dan lebar sudu 0,3 m. penelitian ini bertujuan untuk mengetahui daya dan efisiensi kincir air. Untuk menguji kincir air tersebut, maka dibuatkan model saluran terbuka dengan panjang saluran 12,25 m, lebar saluran 0,334 m, tinggi saluran 6,0 m, dan sudut kemiringan 450. Daya dan efisiensi kincir air dapat diketahui dengan memvariasikan debit aliran 0,050 m3/s sampai 0,032 m3/s pada beban 2 kg sampai 22 kg. Pengukuran debit aliran dengan metode mengisi ember dengan voleme ember 50 L. Untuk mengetahui debit aliran yang melalui saluran maka volume ember dibagi dengan waktu yang dibutuhkan untuk mengisi ember tersebut.

Peningkatan Pemahaman dan Keterampilan Pengoperasian Sistem Hydrant di Rusun Kejaksaan Tinggi Manado Boli, Rahmad Hidayat; Oli’i , Rizky Selly Nazarina; Talango, Novriyanti; Ishak, Sahional
Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Vol. 5 No. 2 (2025): Maret 2025 - Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59395/altifani.v5i2.672

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pemahaman dan keterampilan penghuni serta pengelola Rusun Kejaksaan Tinggi Manado dalam mengoperasikan dan merawat sistem hydrant sebagai bagian dari mitigasi kebakaran. Sistem hydrant, yang terdiri dari pompa hydrant dan pillar hydrant, merupakan infrastruktur vital dalam penanggulangan kebakaran. Namun, masih terdapat kendala dalam operasional dan pemeliharaannya akibat kurangnya sosialisasi dan pelatihan teknis. Kegiatan ini dilakukan melalui pendekatan edukatif, pelatihan teknis, dan simulasi kebakaran guna meningkatkan kesiapsiagaan penghuni dalam menghadapi keadaan darurat. Hasil dari pengabdian ini menunjukkan peningkatan kesadaran serta kemampuan penghuni dan pengelola dalam menggunakan sistem hydrant secara efektif, sehingga diharapkan dapat meminimalkan risiko kebakaran di lingkungan rusun.

ANALISA PRESTASI KINCIR AIR TIPE UNDERSHOT YANG BEKERJA PADA SALURAN HORIZONTAL Boli, Rahmad Hidayat; Pido, Rifaldo; Rival, Mohamad
KOLONI Vol. 1 No. 1 (2022): MARET 2022
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/koloni.v1i1.4

The need for electrical energy has become one of the basic needs for human life, the limitations and capabilities of the state electricity company in providing electricity to the Indonesian people have not been met. Like a village that has not been reached by PLN electricity. The purpose of this study is to determine the output power of a micro hydro power plant using a flat blade, the load variation used is 1 kg to 15 kg, and to determine the characteristics of the waterwheel, then describe the power and efficiency curve using a flat blade on the type Undershot stream. The method used in this research is to measure power efficiency by varying the flow rate of 0.0166 m3/s and 0.0155 m3/s. The flow rate measurement is carried out by filling a bucket with a bucket volume of 20 L. The results obtained in this study are the largest discharge is found at 0.0166 m3/s discharge to get a power of 12.127 Watt, resulting in a waterwheel efficiency of 18.569% at 56 axis rotation 23 rpm. Keyword: Water Wheel, Flat Spoon, Efficiency, Power, Torque

Enhancement of Solar Panel Efficiency by Comparative Analysis of Cooling Systems Utilizing Water Flow, Air Flow, and No Cooling Pido, Rifaldo; Boli, Rahmad Hidayat; Day, Randy Rianto
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.7336

This paper presents the results of a study on increasing the efficiency of solar panels with a comparative analysis of cooling systems utilizing air flow, air and without cooling. The method with cooling flow is used to absorb heat generated by the PV module. This study was designed simply and effectively, tested in outdoor conditions. The rear surface of the PV panel was flowed with a fluid that was in direct contact. The results showed that solar panels with air cooling systems were relatively more effective compared to other cooling systems, namely being able to increase output power by 36.50 watts and efficiency by 12.7%, compared to air cooling systems with output power of 34.56 watts and efficiency of 11.12%, while for solar panels without cooling the output power was 31.01 watts and efficiency of 10.56%.

KAJIAN KOMPUTASI DAN EKSPERIMENTAL PENGARUH KONTROL AKTIF TERHADAP HAMBATAN AERODINAMIKA MODEL KENDARAAN Rauf, Wawan; Rifal, Mohamad; Boli, Rahmad Hidayat
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 10 No. 1 (2022): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v10i1.268

Abstrak: Kajian Komputasi dan Eksperimental Pengaruh Kontrol Aktif terhadap HambatanAerodinamika Model Kendaraan. Dinamika aliran udara sangat dipengaruhi oleh pembentukan separasi di sekitar bodi kendaraan. Separasi aliran menjadi pemicu perbedaan tekanan yang signifikan antara sisi depan dan belakang sehingga muncul efek tarikan ke arah belakang sebagai kontributor utama besarnya hambatan aerodinamika yang diterima kendaraan. Penelitian ini fokus pada kajian hambatan aerodinamika dengan memperhatikan karakteristik pola aliran yang terbentuk dan distribusi tekanan pada dinding belakang model kendaraan melalui metode simulasi komputasi dan eksperimental laboratorium. Kontrol aktif tiupan ditempatkan pada sisi atas dinding belakang Ahmed model dan diatur pada kecepatan 1.5 m/s. Hasilnya menunjukkan bahwa penggunaan kontrol aktif tiupan pada sisi belakang mampu menunda separasi, meningkatkan koefisien tekanan, dan mengurangi hambatan aerodinamika model kendaraan. Abstract: Computational and Experimental Studies of the Effect of Active Control on Aerodynamic Drag of Vehicle Models. The dynamics of air flow is strongly influenced by the formation of separations around the vehicle body. The flow separation triggers a significant pressure difference between the front and rear sides so that a rearward pull effect appears as the main contributor to the amount of aerodynamic drag received by the vehicle. This research focuses on the study of aerodynamic resistance by paying attention to the characteristics of the flow pattern formed and the pressure distribution on the rear wall of the vehicle model through computational simulation methods and laboratory experiments. The blowing active control is located on the upper side of the back wall of the Ahmed model and is set at a speed of 1.5 m/s. The results show that the use of blowing active control on the rear side is able to delay separation, increase the pressure coefficient, and reduce the aerodynamic drag of the vehicle model.

KAJIAN PENGARUH KONTROL ALIRAN TERHADAP KOEFISIEN HAMBAT MODEL KENDARAAN Boli, Rahmad Hidayat; Rauf, Wawan; Rifal, Moh; Pido, Rifaldo
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 11 No. 1 (2023): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v11i1.355

The characteristics of the airflow that is formed around the vehicle body affects the value of the resistance acting on the vehicle. When it reaches the rear edge of the vehicle, the flow undergoes a process of separation. So modification of the vehicle body design that is able to reduce the separation is urgently needed. Flow engineering around the vehicle body can be obtained by modifying the shape which is considered more aerodynamic. Meanwhile, flow engineering can also be obtained through the application of an active control system in areas that are considered to have the potential to initiate flow eddies on the rear side of the vehicle and have a major influence on the formation of flow separation. This research aims to examine the impact of the application of flow control blowing technique on the resistance of the modeled vehicle. The geometric angle of the front wall is determined to be 35°. The research uses a numerical computational approach with a standard k-epsilon as a turbulence model. The upstream velocity applied is 13.9 m/s, while the blowing velocity is set at 0.5 m/s. The research results prove that the application of blowing flow control has succeeded in minimizing the formation of wake structures and has the effect of delaying separation and has succeeded in reducing the aerodynamic drag coefficient to 9.3187%.

EFEK PENERAPAN KONTROL AKTIF BLOWING TERHADAP TARIKAN AERODINAMIKA MODEL KENDARAAN Rauf, Wawan; Rifal, Moh; Pido, Rifaldo; Boli, Rahmad Hidayat; Haris, Zulfikar Abd
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 11 No. 1 (2023): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v11i1.358

Vehicle stability when driving is an issue that needs attention because it relates to comfort in driving and the effectiveness of fuel consumption. This is caused by the large aerodynamic drag force of the vehicle due to the structure of the air flow which flows regularly and experiences separation when it reaches the rear end point of the vehicle. This separation of the flows causes significant negative pressure on the rear window due to the return flow which does not follow the shape of the vehicle body. The purpose of this study was to analyze the effect of implementing active control of blowing type flow on vehicle models on aerodynamic drag. This study applies a numerical computational method with a modified Ahmed body model as the main object of research. The active blowing control is placed at the rear end of the model which is considered the initial separation area. Blowing speed was varied 0.2 m/s, 0.8 m/s, 1.5 m/s, and 2.0 m/s and was tested at an upstream speed of 16.7 m/s. Research results indicate that the application of active blowing control has succeeded in providing a delay in separation effect, reducing turbulence and reducing aerodynamic drag by 8-9%.

ANALISIS KONSUMSI ENERGI LISTRIK PADA PEMBANGUNAN NUWSP BIYONGA KABUPATEN GORONTALO Boli, Rahmad Hidayat; Pido, Rifaldo; Arbie, Mohamad Rifal; Rauf, Wawan
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1496

The need for electrical energy today is starting to increase along with the increase in population and rapid development, but inversely proportional to the progress or innovations in increasing renewable energy. Given that this renewable energy can be developed continuously and operational costs are relatively cheap, the electricity that relies on coal (fossil) over time will run out and cannot be renewed, the discussion concerns the supply of PLN supplies. So that in this study the focus is on the utilization of electrical energy for the NUWSP development area of Gorontalo Regency Biyonga Village and calculating the total consumption needs of the electrical energy used. After research and data analysis, the results obtained are 189 kVA or 189,000 vA, the total peak demand with load is 3 units of centrifugal pumps, 10 points of room lighting, and 12 points of lighting around the building, the results of the analysis obtained became a reference and suggested to install electrical energy with a capacity of 197 kVA or 197,000 vA with the consideration that when development occurs, the demand for electrical energy is still sufficient from what is installed.

KAJIAN KOMPUTASI DAN EKSPERIMENTAL PENGARUH KONTROL AKTIF TERHADAP HAMBATAN AERODINAMIKA MODEL KENDARAAN Rauf, Wawan; Rifal, Mohamad; Boli, Rahmad Hidayat
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 10 No. 1 (2022): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Abstrak: Kajian Komputasi dan Eksperimental Pengaruh Kontrol Aktif terhadap HambatanAerodinamika Model Kendaraan. Dinamika aliran udara sangat dipengaruhi oleh pembentukan separasi di sekitar bodi kendaraan. Separasi aliran menjadi pemicu perbedaan tekanan yang signifikan antara sisi depan dan belakang sehingga muncul efek tarikan ke arah belakang sebagai kontributor utama besarnya hambatan aerodinamika yang diterima kendaraan. Penelitian ini fokus pada kajian hambatan aerodinamika dengan memperhatikan karakteristik pola aliran yang terbentuk dan distribusi tekanan pada dinding belakang model kendaraan melalui metode simulasi komputasi dan eksperimental laboratorium. Kontrol aktif tiupan ditempatkan pada sisi atas dinding belakang Ahmed model dan diatur pada kecepatan 1.5 m/s. Hasilnya menunjukkan bahwa penggunaan kontrol aktif tiupan pada sisi belakang mampu menunda separasi, meningkatkan koefisien tekanan, dan mengurangi hambatan aerodinamika model kendaraan. Abstract: Computational and Experimental Studies of the Effect of Active Control on Aerodynamic Drag of Vehicle Models. The dynamics of air flow is strongly influenced by the formation of separations around the vehicle body. The flow separation triggers a significant pressure difference between the front and rear sides so that a rearward pull effect appears as the main contributor to the amount of aerodynamic drag received by the vehicle. This research focuses on the study of aerodynamic resistance by paying attention to the characteristics of the flow pattern formed and the pressure distribution on the rear wall of the vehicle model through computational simulation methods and laboratory experiments. The blowing active control is located on the upper side of the back wall of the Ahmed model and is set at a speed of 1.5 m/s. The results show that the use of blowing active control on the rear side is able to delay separation, increase the pressure coefficient, and reduce the aerodynamic drag of the vehicle model.

KAJIAN PENGARUH KONTROL ALIRAN TERHADAP KOEFISIEN HAMBAT MODEL KENDARAAN Boli, Rahmad Hidayat; Rauf, Wawan; Rifal, Moh; Pido, Rifaldo
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 11 No. 1 (2023): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v11i1.355

The characteristics of the airflow that is formed around the vehicle body affects the value of the resistance acting on the vehicle. When it reaches the rear edge of the vehicle, the flow undergoes a process of separation. So modification of the vehicle body design that is able to reduce the separation is urgently needed. Flow engineering around the vehicle body can be obtained by modifying the shape which is considered more aerodynamic. Meanwhile, flow engineering can also be obtained through the application of an active control system in areas that are considered to have the potential to initiate flow eddies on the rear side of the vehicle and have a major influence on the formation of flow separation. This research aims to examine the impact of the application of flow control blowing technique on the resistance of the modeled vehicle. The geometric angle of the front wall is determined to be 35°. The research uses a numerical computational approach with a standard k-epsilon as a turbulence model. The upstream velocity applied is 13.9 m/s, while the blowing velocity is set at 0.5 m/s. The research results prove that the application of blowing flow control has succeeded in minimizing the formation of wake structures and has the effect of delaying separation and has succeeded in reducing the aerodynamic drag coefficient to 9.3187%.

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