Abstract
The kinetic turbine is one of the solutions for use in low-speed river flows ranging from 0.01–2.8 m/s. This kinetic turbine is used as a conversion equipment to convert the water kinetic energy into an electrical energy. The working principle of a kinetic turbine is utilizing and relies on the water kinetic energy. Water flowing into the turbine area will produce a momentum on the turbine blades. This momentum change would then push the turbine blades and finally spin the turbine runner. The aim of research is thedetermination of the effect of water flow steering angle (a) and water flow rate variation in the kinetic turbine performance. This research uses vertical axis kinetic turbines with eight curve blade attached to the turbine runner. The variables used are two values of water flow steering angle, namely 25°and 35°. The water flow rate variation of 30 m3/h, 35 m3/h, 40 m3/h and 45 m3/h. The method used in this study uses a real experimental method. These two variations would then compare with the result of a hydrokinetic turbine performance done on the previous research. The results show that the water flow steering angle a affected the kinetic turbine performance (power, efficiency and torque). From these several water flow steering angle and water flow rate variations, the turbine performance with a 35° water flow steering angle get the highest performance compared with the use of 25° and 14° water flow steering angle. The greater the flow angle and the greater the water flow rate, the greater the torque, power and efficiency. The highest turbine power produced, P=17.5 W, occurs on the 35° water steering angle, and on a Q=45 m3/h water flow rate and on a 80 rpm turbine rotation. While the highest turbine efficiency, h=27 %, occurred on the Q=30 m3/h water flow rate, on a 60 rpm turbine rotation and on a water flow steering angle a=35°. The highest turbine torque, 3.1 Nm, occurs at Q=45 m3/h water flow rate at a maximum turbine braking and on a water steering angle a=35°.
Highlights
The World Climate Change Summit or UNFCCC COP21 held in Paris aims to keep the global temperature rise below 2 °C, compared to temperatures before the Industrial Revolution, and encourage further efforts to increase the temperature to no more than 1.5 °C
At the conference Indonesia was committed to reducing its greenhouse gas (GHG) emissions in 2020 by 26 % with its own efforts, and up to 41 % with international assistance set forth in the NDC (Nationally Determined Contribution)
The use of curve shaped blades in this study is because the mass distribution of water through a bouncing curve blade spread in all directions
Summary
The World Climate Change Summit or UNFCCC COP21 held in Paris aims to keep the global temperature rise below 2 °C, compared to temperatures before the Industrial Revolution, and encourage further efforts to increase the temperature to no more than 1.5 °C. The use of curve shaped blades in this study is because the mass distribution of water through a bouncing curve blade spread in all directions This flow will increase the turbine tangential force, so that turbine torque increases and results a turbine performance increase [6]. The aim of research is the determination of the effect of flow steering angle variations on a kinetic turbine performance. 2. Literature review and problem statement Hydrokinetic turbine is a simple turbine that utilizes water flow kinetic energy. Literature review and problem statement Hydrokinetic turbine is a simple turbine that utilizes water flow kinetic energy This turbine is easy to make, the manufacturing costs are not expensive, the erection is easy, the operation is easy and the maintenance is not difficult. Another study, conducted a research on hydrokinetic turbine by combining the turbine blade number and the flow steering blade angle [11]. Where Q – water flow rate (m3/h); V – water velocity (m/s); A – cross-sectional area (m)
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