This study aims to create a Model of Water Velocity Distribution in Multilevel Cross Flow Water Turbine Cross Flow with a system utilizing residual energy from the exhaust channel at each level. Energy from the exhaust is reused at the next level. This system is expected to be able to increase the power generated from a series of cross flow turbines arranged in stages. The cross flow water turbine designed this multilevel system is to utilize the speed of the water coming out from the first second and third level. Water coming out of the turbine at this first level still has speed. Each level uses a conductor blade, this blade is a blade in a fixed position that serves to direct the water to enter the next runner. In theory there is still energy left from the water that comes out through the blades of the turbine to the exhaust channel and tail race. This research was designed by making water turbine models from the first, second and third levels. This model illustrates the residual energy that can be utilized by the turbines below it. The design of the turbine is made by calculating the speed of water coming out of the first level turbine and the speed of incoming water at the second level. Then the speed of the water comes out of the second level and the speed of the water enters at the third level. Basic planning for turbines level two and three are taken based on the speed of the water going out. Then the dimensions of width, and diameter of the runner at each level refer to the speed of the exit water. This research analyzes the amount of residual energy that can be utilized by the next turbine. The diameter of the runner from the first level turbine to the second and third level turbines becomes smaller. The study design was carried out by examining the difference in height of each runner by conditioning the turbine rotation speed from level one to level two and three the same. At every change in turbine level, one second and third turbine blade is made. The intended blade is the blade that delivers the incoming water as a whole to the transmission pipe at each turbine. The method applied in this research is the multilevel cross flow modeling system, where the crossflow turbine model is designed to be arranged in stages. The trial test is done by controlling the research parameters such as water discharge, head height and runner rotation. The dimensions of the runner and the width of the turbine approach are theoretically analyzed. The results of the study were carried out by testing manually and through the approach of using a software fluid mechanic. The results obtained an increase in total efficiency of this multilevel system reaches 90%.
Volume 12 | 01-Special Issue
Pages: 988-994
DOI: 10.5373/JARDCS/V12SP1/20201151