Jusuf Haurissa, Slamet Wahyudi, Yudy Surya Irawan, Rudy Soenoko
The focus of this research is the turbine flow behavior toward the turbine rotation quality, the turbine efficiency and the turbine power generated. The turbine rotation quality is really needed for the high quality electricity power generated. The method used in this research is the experimental method. The fluid flow behavior was observed by using a Casio 1000 handy camera and a Canon 550D camera. The data obtained from this observation is in a form of images and was completed with a data acquisition measurement (ADC). The result from the data collected and from the data processed shows that, the water flow comings out from the turbine first stage coming into the inner section of the turbine disc, would result a chaotic water flow. It is because of the water flow comings out from each turbine blade have their own direction. This condition, would ruin all the water flow direction, so that the water flow hits the second stage would probably hits the back of the blade, this would produce an unstable turbine rotation, and of course would reduce the turbine power (torque). Furthermore, by adding or attaching a guide passage with gate vanes to the second stage, the second stage power generated would almost optimum; this is because of the water flow angle entering the second stage would almost constant and always on the maximum condition. The water flow angle was forced to always at the exact maximum angle. The turbine torque would increase, the turbine efficiency would increase too and the turbine rotation would more constant and stable. This turbine stability will ended with a much better electricity quality. The turbine power without implementing the guide passage on the second stage produces a power of 22,608 watt. Furthermore, the overall turbine power by implementing the guide passage on the second stage produces power about 24,249 watt, and the overall turbine power by implementing the guide passage with gate vanes on the second stage produces power about 25.120 watt. So, there is a 2.215 watt ( 25,120 watt-22,608 watt ) additional power produced, which means that there is a 10% power increase. The turbine efficiency without the guide passage is about 61.451 %,. Furthermore, the turbine efficiency using the guide passage is about 71, 236% and the turbine efficiency using a guide passage with gate vanes, increase to 72.569%. Finally, there is an 11,118 % ( 72,569 % - 61,451 %) increase of the turbine efficiency.
Mechanical Engineering Doctorate Program, University of Brawijaya and Mechanical Engineering, Jayapura Science and Technology University, Jayapura, Jl. Raya Sentani Padang Bulan, Indonesia; Mechanical Engineering, University of Brawijaya, Malang, Jl. MT. Haryono 167, Indonesia
