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Rahman Saleh, Arif
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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PENGARUH VARIASI DESAIN SUDU TERHADAP KARAKTERISTIK HIDRODINAMIKA TURBIN AKSIAL VORTEX ULTRA LOW HEAD MENGGUNAKAN METODE CFD Khanif, Masnurojak Bin; Rahman Saleh, Arif; Fajarningrum, Nurmala Dyah; Sulistiyo, Raka Mahendra
ELEMEN : JURNAL TEKNIK MESIN Vol. 11 No. 1 (2024)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v11i1.279

Abstract

Renewable energy is being developed by many advanced countries due to its positive impacts. Indonesia has a high potential for hydropower generation using axial vortex turbines, which are effective at low head heights. Researchers use experimental methods, employing CFD simulations with specific boundary conditions. In one blade variation, testing was conducted 18 times with speed variables (20, 40, 60, 80, 100, 120 RPM) and blade angles of 22.5°, 35°, 40°. Torque data was collected after achieving convergence. The results showed the highest torque at 22.5° blade angle and 80 RPM speed, amounting to 2.4 N.m, and efficiency of 57.90% at 120 RPM. Researchers concluded that the decrease in torque is caused by the increase in vortex flow, reducing interaction between the blade and fluid after 80 RPM, while the increase in torque before 80 RPM is due to minimal swirling in the basin.
ANALISIS MESIN ROTARY DRYER UNTUK PENGERINGAN BAHAN BAKU PELET REFUSE DERIVED FUEL (RDF) MENGGUNAKAN SOFTWARE SIMULATION ANSYS Dzikron Muchlisin; Rahman Saleh, Arif; Iswahyudi, Sigit; Mujiarto, Sigit
JURNAL FOUNDRY Vol. 7 No. 1 (2024): JURNAL FOUNDRY
Publisher : LPPM Politeknik Manufaktur Ceper

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62944/jf.v7i1.80

Abstract

Badan Pusat Statistik Kota Magelang pada tahun 2018 menyatakan sebanyak 121.872 jiwa. banyaknya penduduk mempengaruhi mengakibatkan sampah yang semakin melonjak. Total jumlah volume sampah di Kota Magelang sebanyak 280,19m^3 dengan komposisi sampah RDF (Refuse Derived Fuel) sebesar 72,6%, sampah plastik sebesar 9,65%, dan sampah kertas 8,25% (BPS, 2016 dalam Kota Magelang Dalam Angka 2016). Mesin pengering “rotary dryer” ini bekapasitas 30 kg dengan silinder drum pengering berdimensi 90 cm X 60 cm serta memiliki ketebalan dinding 4 mm, dilengkapi saluran masuk, burner, blower, motor listrik 1 HP yang ditranmisikan dengan gear box, dan bahan bakar LPG. Berdasarkan hasil simulasi Ansys yang telah dilakukan dengan suhu 330°C pada Aluminium Alloy 6061 dengan kecepatan putar tabung 1100 rpm. Saluran masuk diatur dengan kecepatan 15 m/s dan dipengarungi gaya grafitasi 9,81 m/s setelah disimulasikan menghasilkan temperatur maksimum sebesar 330,0316 °C dan nilai minimum 30,638°C, kemudian untuk kecepatan velosity menghasilkan nilai minimal 72.65794 m/s dan nilai maksimum sebesar 142.2872 m/s. Hasil uji equivalent stress maximum (von mises) simulasi Finite Element Analysis (FEA) dengan tekanan yang didapatkan dari kapasitas 30 kg dan berat tabung pengering 30,25 kg. Sehingga hasil nilai von mises yang terjadi pada sebesar 0.32553 MPa.
PENGARUH VARIASI DESAIN SUDU TERHADAP KARAKTERISTIK HIDRODINAMIKA TURBIN AKSIAL VORTEX ULTRA LOW HEAD MENGGUNAKAN METODE CFD Khanif, Masnurojak Bin; Rahman Saleh, Arif; Fajarningrum, Nurmala Dyah; Sulistiyo, Raka Mahendra
ELEMEN : JURNAL TEKNIK MESIN Vol. 11 No. 1 (2024)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v11i1.279

Abstract

Renewable energy is being developed by many advanced countries due to its positive impacts. Indonesia has a high potential for hydropower generation using axial vortex turbines, which are effective at low head heights. Researchers use experimental methods, employing CFD simulations with specific boundary conditions. In one blade variation, testing was conducted 18 times with speed variables (20, 40, 60, 80, 100, 120 RPM) and blade angles of 22.5°, 35°, 40°. Torque data was collected after achieving convergence. The results showed the highest torque at 22.5° blade angle and 80 RPM speed, amounting to 2.4 N.m, and efficiency of 57.90% at 120 RPM. Researchers concluded that the decrease in torque is caused by the increase in vortex flow, reducing interaction between the blade and fluid after 80 RPM, while the increase in torque before 80 RPM is due to minimal swirling in the basin.
Co-Authors Dzikron Muchlisin Fajarningrum, Nurmala Dyah Khanif, Masnurojak Bin Raka Mahendra Sulistiyo Sigit Iswahyudi Sigit Mujiarto