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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%.

Studi Eksperimental Kinerja Sistem Pendingin Solar Cell terhadap Perubahan Intensitas Cahaya Matahari Pido, Rifaldo; Himran, Syukri; Mahmuddin; Rifal, Mohamad
J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Vol. 8 No. 1 (2023): J-Proteksion
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/jp.v8i1.674

Potensi pemanfaatan energi matahari sebagai sumber energi alternatif, saat ini kebutuhan energi terbarukan semakin meningkat dan sinar matahari merupakan sumber energi yang sangat melimpah. Alat yang dapat digunakan saat ini untuk mengonversi secara langsung cahaya matahari menjadi listrik disebut photovoltaic. Pada penelitian ini diujikan 2 buah photovoltaic module kapasitas 50 WP dengan perbandingan photovoltaic module berpendingin dan tidak berpendingin terpasang pada posisi yang tetap/horizontal terhadap bumi dengan sudut kemiringan 15°, Hasil pengujian menunjukkan bahwa perubahan intensitas cahaya matahari diikuti dengan kenaikan daya dan efisiensi. Daya maksimal yang dicapai yaitu pada pengujian menggunakan media air pendingin sebesar 36,5 Watt dengan Efisiensi 10,96 % sedangkan photovoltaic module tidak berpendingin daya maksimal yang diperoleh 30,2 watt dengan efisiensi 8,51 % terukur pada kondisi waktu yang sama pada pukul 12.00 WIB.

Monitoring dan Evaluasi Tenaga Ahli Teknik Bersama BPK Perwakilan Provinsi Gorontalo Djau, Rahman A.; Ma’sum, Ratna D.; Pido, Rifaldo; Boli, Rahmad H.; Ichsan, Ilyas; Bumulo, Nasir
Journal of Entrepreneurship and Community Innovations Vol 3 No 1 (2024): AGUSTUS 2024
Publisher : Lembaga Penelitian Universitas YARSI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33476/jeci.v3i1.144

Pengabdian dalam rangka melakukan monitoring dan evaluasi ini bertujuan untuk mendapatkan kenyataan fisik dilapangan bahwa pekerjaan konstruksi yang dilaksanakan pada 4 (empat) dinas/instansi, yaitu Provinsi Gorontalo, Kota Gorontalo, Kabupaten Bone Bolango dan Kabupaten Pohuwato sudah tercapainya target tepat waktu, tepat mutu, tepat anggaran dan tepat sasaran serta untuk meminimalisir kesalahan–kesalahan yang terjadi pada pelaksanaan proyek konstruksi. Permasalahan yang sering dihadapi yaitu ketidaksesuaian kuantitas dan kualitas serta spesifikasi sebagaimana yang tertuang dalam kontrak serta kelengkapan administrasi yaitu dokumentasi dan nota pembelian. Metode yang digunakan adalah melakukan pengukuran kembali untuk kuantitasnya dan pengambilan sampel data untuk pengujian kualitasnya. Berdasarkan hasil temuan dilapangan ini memberikan pelajaran dan pengalaman yang penting bagi penyedia jasa agar dalam pelaksanaan pekerjaan harus memperhatikan spesifikasi yang tertuang dalam kontrak.

Program Pengolahan dan pemasaran Produk Rempeyek Kacang Hijau Di desa Bakida, Kecamatan Helumo Kabupaten Bolaang Mongondow Selatan Junus, Dikson; Nuna, Muten; Ernikawati, Ernikawati; Moonti, Roy Marthen; Ismail, Nurwita; Paramata, Yeni; Kodai, Dince A.; Pido, Rifaldo; Kasim, Sintiya; Jasirudin, Wanti; Bonggu, Fian; Lanuru, Oktafiani; Kadepa, Magdalena; Saini, Fauzia; Machfud, Muhamad; Kamaru, Muhammad; Pakaya, Abdul Ahmad; Gobel, Adam
Insan Cita : Jurnal Pengabdian Kepada Masyarakat Vol 4, No 2 (2022): Agustus 2022 - Insan Cita : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Gorontalo

Program pemberdayaan masyrakat nelayan melalui pelatihan pengolahan rempeyek kacang hijau Pada ibu-ibu istri nelayan di Desa Bakida kecamatan helumo, kabupaten Bolaan Mongondow Selatan Bertujuan untuk meningkatkan perekonomian keluarga melalui alternatif usaha. Kegiatan ini melalui tahapan-tahapan berupa survei lokaso, pelatihan pembuatan produk pengolahan rempeyek lacang hijau, pengemasan produk dan pemasaran produk. Produk yang dihasilkan diharapkan dapat meningkatkan Nilai dan penghasilan Melalui kualitas produk yang baik, kemasan yang higienis dan menarik serta pemasaran Yang baik dan efektif

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.

ANALISIS PENGARUH VARIASI SUDUT KEMIRINGAN TERHADAP OPTIMASI DAYA PANEL SURYA Pido, Rifaldo; Boli, Rahmat Hidayat; Rifal, Moh; Rauf, Wawan; Dera, Nurmala Shanti; Day, Randy Rianto
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 10 No. 2 (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.v10i2.287

Abstrak: Analisis Pengaruh Variasi Sudut Kemiringan Terhadap Optimasi Daya Panel Surya. Di Gorontalo suhu atau temperature udara yang tinggi yang dapat mempengaruhi kinerja pada panel surya. Suhu udara di Gorontalo pada siang hari dapat menembus angka diatas 34°C dibandingkan suhu optimal operasi dari panel surya sendiri adalah 25°C. Rumusan masalah dalam penelitian ini adalah apakah ada pengaruh perubahan sudut sel surya terhadap intensitas cahaya. Sedangkan Tujuan dari penelitian ini adalah upaya mengoptimalkan output tegangan, arus dan daya pada sel surya agar lebih maksimal. Salah satu metode pengoptimalan sel surya adalah dengan memvariasikan sudut kemiringan panel surya 9˚, 12˚ dan 15˚. Metode pada penelitian ini dengan melakukan pengukuran besaran intensitas cahaya matahari, arus dan tegangan dengan menggunakan panel surya 50 WP, pengukuran tersebut dilakukan selama 9 hari. Hasil analisis pada penelitian ini adalah persentase peningkatan daya sebesar 43.85 Watt pada sudut kemiringan 15˚, sedangkan daya output mengalami penurunan pada sudut kemiringan 12˚ dan 9 ˚ yaitu 41.70 Watt dan 39.43 Watt. Secara keseluruhan perubahan arah sudut sel surya berpengaruh terhadap intensitas cahaya matahari yang berakibat pada kuat lemahnya tegangan yang diterima panel sel surya. Semakin besar intensitas cahaya yang diterima, maka semakin besar pula tegangan yang dihasilkan panel surya. Kata kunci: sel surya; intensitas cahaya; sudut azimuth; daya Abstrack: Analysis of the Effect of Tilt Angle Variations on Solar Panel Power Optimization. In Gorontalo the temperature or air temperature is high which can affect the performance of the solar panels. The air temperature in Gorontalo during the day can reach above 34°C compared to the optimal operating temperature of the solar panels themselves which is 25°C. The formulation of the problem in this study is whether there is an effect of changing the angle of the solar cell on the light intensity. While the purpose of this research is an effort to optimize the output voltage, current and power in solar cells to be more leverage. One method of optimizing solar cells is by varying the angle of inclination of the solar panels to 9˚, 12˚ and 15˚. The method in this study is to measure the intensity of sunlight, current and voltage using a 50 WP solar panel, the measurements were carried out for 9 days. The results of the analysis in this study are the percentage increase in power of 43.85 Watt at an angle of 15˚, while the output power decreases at an angle of 12˚ and 9˚, namely 41.70 Watt and 39.43 Watt. Overall changes in the direction of the solar cell angle affect the intensity of sunlight which results in the strength and weakness of the voltage received by the solar cell panel. The greater the intensity of light received, the greater the voltage generated by the solar panel. Kata kunci: solar cell; intensity of light; azimuth angle; power

PERENCANAAN COLD STORAGE SEBAGAI PENYIMPANAN UDANG VANAME DAERAH DI KABUPATEN POHUWATO PROVINSI GORONTALO Pido, Rifaldo; Gobel, Fendy Faizal; Edahwati, Luluk
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.v11i1.352

This study describes the calculation of cold storage analysis for planning the preservation of vannamei shrimp in Pohuwato Regency. The purpose of this paper is to calculate the cooling load on frozen fish cold storage, calculate the performance of the vapor compression cycle including mass flow rate, compressor power, and COP. This study uses a theoretical design method. Cold storage design for product storage. The design data was obtained from field observations. The calculation results showed that the Refrigerant used was Refrigerant 12 (R-12), a vannamei shrimp product. The cycle cooling load is 47.33 kW. Cold storage designed for the process of preserving shrimp with a capacity of 13 tons, Cooling temperature in cold storage is 10° C, Superheated temperature is 5° C, Sub cooled temperature is 5° C, Refrigerant temperature in the condenser is 35° C, Refrigerant temperature in the evaporator is 5° C, the pressure in the condenser is 0.8 MPa, the pressure in the evaporator is 0.4 MPa so that a coefficient of performance (COP) of 4.7 is obtained.

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%.

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