A research has been conducted on the characteristics of the results of the burning of briquettes in a mixture of oil palm and rice husk. This study aims to determine the effect of the composition of the resulting briquette mixing. The research method was carried out by testing dry shrinkage, shrinkage of fuel, levels of evaporating substances and water absorbency in briquettes. The characteristics of briquettes based on the size of the briquettes are Depreciation in the lowest dry shrinkage at 70% husk size by 0.81% and the highest at 90% husk size by 2.87%. The lowest shrinkage of fuel shrinkage is at the husk size of 50% by 1.77% and the highest is at the size of the husk of 70% by 4.12%. The lowest evaporation rate of briquettes at 60% and 80% of husk size is 1.52% and the highest is at 70% husk size of 8.57%. The lowest water absorption rate at 80% husk size is 1.54% and the highest at 60% husk size is 8,20%.
Daya dan efisiensi merupakan parameter – parameter yang menjadi tolak ukur dari kinerja sebuah turbin kinetik. Penelitian sebelumnya menunjukan berbagai faktor seperti debit aliran, dimensi dan geometri dari turbin kinetik adalah varaibel – variabel yang mempengaruhi besarnya daya dan efisiensi. Dalam upaya meningkatkan kinerja turbin kinetik dibutuhkan pemahaman yang mendalam terhadap faktor – faktor yang mempengaruhinya. Oleh karena itu tujuan dari penelitian ini adalah untuk mengetahui pengaruh variasi lebar sudu mangkok terhadap kinerja turbin kinetik. Metode yang digunakan dalam penelitian ini adalah eksperimental nyata pada skala laboratorium. Pengujian dilakukan pada turbin kinetik poros vertikal dengan variasi lebar sudu 8 cm, 9 cm dan 10 cm. Setiap turbin diuji pada variasi debit air 45 m3/h, 50 m3/h, 55 m3/h, 60 m3/h dan 65 m3/h dan variasi putaran 20 rpm, 40 rpm, 60 rpm, 80 rpm dan 100 rpm. Hasil penelitian menunjukan bahwa lebar sudu mangkok mempengaruhi kinerja dari turbin kinetik dimana lebar sudu mangkok 10 cm memiliki kinerja lebih tinggi dari lebar sudu mangkok 8 cm dan 9 cm. Kinerja tertinggi turbin kinetik pada variasi lebar sudu mangkok 10 cm diperoleh pada kondisi putaran 80 rpm dan debit 65 m3/h. Pada kondisi tersebut daya yang dihasilkan oleh turbin kinetik adalah 12,98 Watt dan efisiensinya 35,72 %.
Power and efficiency are parameters that show the performance of a kinetic turbine. Previous studies have shown various factors such as flowrate, dimensions and geometry of kinetic turbines are variables that affect the magnitude of power and efficiency. In an effort to improve the performance of kinetic turbines it takes a deep understanding of the factors that influence it. Therefore the purpose of this study was to determine the effect of width variations of bowl blades on kinetic turbine performance. The method used in this study was real experimental on a laboratory scale. Tests were carried out on vertical shaft kinetic turbines with blade width variations of 8 cm, 9 cm and 10 cm. Each turbine is tested on variations of water discharge 45 m3/h, 50 m3/h, 55 m3/h, 60 m3/h and 65 m3/h and in rotation of 80 rpm. The results showed that the width of the bowl affected the performance of the kinetic turbine where the width of the 10 cm bowl blade had a higher performance than the width of the bowl blade 8 cm and 9 cm. The highest performance of kinetic turbines in the variation of the width of the 10 cm bowl blade was obtained at discharge conditions of 65 m3/h. In these conditions the power produced by the kinetic turbine is 12.98 Watts and the efficiency is 35.72%.
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