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All Journal Proceedings Conference on Marine Engineering and its Application
Nopem Ariwiyono
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Engineering Mechanical Engineering

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Analisa Pengaruh Sudut Stagger Di Depan Advancing Blade Terhadap Performa Turbin Air Savonius Myring Blade n=1 & n=2 Alfin Ardianto; Priyo Agus Setiawan; Nopem Ariwiyono
Proceedings Conference on Marine Engineering and its Application Vol 3 No 1 (2020): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

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Abstract

Savonius water turbines can work at low fluid flow rates and have high torque, but have disadvantageswhich is the lowest Cp value compared to other turbine types. Efficiency can be improved by changing the shapeof the Savonius Turbine blade using the myring equation and adding an obstacle. The experimental method in thisstudy combines two blades resulting from variations of the value (n) in the myring equation n = 1 and n = 2, withmyring n = 1 placed on the concave side and n = 2 on the convex side. To improve performance, a 12 cm diametercircular cylinder is placed in front of the advancing blade with varying stagger angles. The test model has a heightof 0.40 m and a diameter of 0.40 m which will be tested in a flowing tank with a width of 1 m and height of 1 m.Experiments were carried out at a current speed of 0.2 m / s by measuring the turbine rotation and load to producea torque coefficient and a power coefficient. The experimental results show that the placement of the circularcylinder with ds / D = 0.3, S / D = 0.75, and ? = 60ยบ obtained the highest performance with an angular velocityof 0.5160 rad / s, Coefficient of torque (Ct) of 0.2936 and Coefficient of power (Cp) of 0.1515. With a percentageincrease compared to myring n = 1 and n = 2 without an obstacle of 10.27%, this proves that the addition of acircular cylinder can improve the performance of Savonius water turbines.
Rancang Bangun Mesin Ekstrusi Plastik Khusus Bahan Styrofoam Bagus Putera Beni Abdullah; Muhammad Shah; Nopem Ariwiyono
Proceedings Conference on Marine Engineering and its Application Vol 3 No 1 (2020): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

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Abstract

Styrofoam banyak digunakan dalam kehidupan sehari-hari antara lain digunakan untuk dekorasi, maket bangunandan wadah penyajian bagi hidangan produk siap saji. Namun, pemanfaatan styrofoam yang luas menjadipermasalahan bagi lingkungan berupa pencemaran. Styrofoam yang dimanfaatkan dalam kegiatan pengemasan,alat rumah tangga, mainan, dan bahan pelengkap menyebabkan menumpuknya sisa hasil pemakaian berupalimbah. Limbah styrofoam sulit terurai dan sering kali menggunung di sungai. Bahkan limbah styrofoammenghasilkan 57 zat berbahaya ke udara. Pengolahan styrofoam yang menggunakan metode sabuk pemanasmemiliki hasil keluaran yang belum sempurna. Hal ini dikarenakan suhu pemanasan yang dicapai oleh sabukpemanas tidak sesuai dengan yang diharapkan, juga karena kurangnya gaya penekanan didalam tabung pemanassehingga hanya beberapa bagian yang mencair. Namun, dengan metode ekstrusi ini, panas yang dihasilkan tidakmeradiasi keluar. Dalam penelitian tugas akhir ini telah dirancang dan dibuat mesin pengolahan limbah plastikstyrofoam berupa mesin exstruder dengan ukuran diameter dalam pada barrel 200 mm dan diameter screw 120mm. Dengan pemanas Electrik heater dengan jenis Band heater 7500 watt sedangkan transmisi extruder 1:5dengan motot listrik yang memiliki daya 25 hp pada 1450 rpm.
Studi Numerik Pengaruh Variasi Rasio Diameter Silinder Pengganggu di Depan Returning Blade Terhadap Coefficient of Power (CP) Turbin Angin Savonius Penambahan Fin Ryandika Aditya Pramanta; Priyo Agus Setiawan; Nopem Ariwiyono
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2685

Abstract

Experimental research on savonius wind turbine with additional fins and variouscircular cylinders have been carried out as an effort to improve the turbine performance.Further research is needed to validate experimental studies.Based on the problems above,numerical studies using 3-dimensional Computational Fluid Dynamics (CFD) method isneeded to determine coefficient of torque values. The turbine has the same diameter and heightof 0.4 meters with additional fins. The various diameter of circular cylinder used are ds/D =0.1; ds/D = 0.2; ds/D = 0.3; and ds/D = 0.4. Then the cylinder is placed at a distance of X =34 cm and Y = 10 cm. The final result is the turbine can reach the highest increase of 5.4% inits performance with ds/D = 0.4 with 0.389 coefficient of power (Cp).
Studi Numerik Pengaruh Jarak Silinder Pengganggu terhadap Returning Blade pada Performa Turbin Angin Savonius Fin Mokhamad Prayitno; Priyo Agus Setiawan; Nopem Ariwiyono
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2687

Abstract

The performance of Savonius wind turbine has increased in the previous experimentalstudies with 1 additional fin and various disturbing cylinder distance in front of returning blade.Although the performance has increased, validation is needed through experiments . Therefore, furtherresearch is needed. The research uses Computational Fluid Dynamic (CFD) with 3-dimensional modelto obtain an increase on the turbine performance. In this simulation the solver chosen is pressure based with transient time mode. In the Savonius wind turbine simulation, the model used is the realizable k-epsilon model. Numerical method can validate experimental study. The turbine uses 1 additional fin with 40 cm in diameter and height. The variation of disturbing cylinder distance is S/d = 1.4 ; S/d =1.7; s/d = 2.0; s/d = 2.3 with wind speed of 5 m/s. Simulations are also carried out to determine thevalue of Coefficient of Power (Cp). The final result is there is 5,40% increase on the turbineperformance at the distance S/d = 1,7 , 5 m/s speed, and 1,0 TSR. The Coefficient of Power (Cp)simulation value is 0,389.
Co-Authors Alfin Ardianto Bagus Putera Beni Abdullah Mokhamad Prayitno Muhammad Shah Priyo Agus Setiawan Ryandika Aditya Pramanta