NOZZLE DAN SUDUT BUANG SUDU TERHADAP DAYA DAN EFISIENSI MODEL TURBIN PELTON DI LAB. FLUIDA

Abstract

Pelton turbine is one of the impulse turbines, wherein the turbine is able to transform the water potential energy into kinetic energy by using a nozzle. The water that comes out of the nozzle with high speed at atmospheric pressure hit the bucket which consists of two symmetrical parts. After hit the bucket, the direction of the flow velocity change resulting in a change of momentum (impulse), consequently rotating turbine wheel generates mechanical energy. As well as pelton turbine models in laboratory fluid which has been studied by R. Hartono Teguh in his finally task in 2006 on Experimental studies Determining Characteristics of Model Redesign Pelton turbine in Lab. Fluid. Assess experimental this time aimed at the development which also examines the pelton turbine models to determine the effect of variations in the diameter of the nozzle and the angle of the bucket waste of the generated power and efficiency. Variation used is the diameter of the nozzle 6 and 9 mm with exhaust bucket angle 145 o , 165 o , and 175 o . Pelton turbine models that were tested using a single nozzle, with a number of buckets 22 pieces, as well as using a runner diameter of 150 mm. Dimensional bucket used has several main dimensions, namely the width of the bucket 36 mm, bucket length 27 mm, bucket depth of 8.10 mm, bucket gap width of 10.8 mm, and the distance of the center beam bucket Valentine of 13.5 mm. From the data obtained by tests performed power and the largest turbine efficiency at variation of 6 mm diameter nozzle at an angle of 175 o bucket exhaust i.e. 38.76 Watts with an efficiency of 82.80%. The largest generator power can be achieved in the variation of 6 mm diameter nozzle at an angle of 175 o bucket exhaust i.e. 10.4 Watt, while the best efficiency occurs at the nozzle 9 mm diameter variation with angle of 175 o exhaust bucket that is 50.61%. Keywords: Pelton Turbine, and Power Efficiency