SPIRAL BASIN INSTALLATION EFFECT ANALYSIS ON AXIAL TURBINE PERFORMANCE

• Main Author: Ihza Ismail, Mar'Ie
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/47111
• Institution: Institut Teknologi Bandung

The population growth of Indonesians has an impact on increasing electrical energy needs. Until now, the fulfillment of electrical energy in Indonesia is still dominated by fossil fuels. This is the cornerstone of the importance of new and renewable energy development to maintain energy sustainability in Indonesia. Micro hydro power plant is one type of hydroelectric power plant that can operate in remote areas in Indonesia. Therefore, it is necessary to increase the performance of water turbine, especially Micro hydro power plant as an alternative to fulfill electrical energy needs in Indonesia. Axial turbines are types of turbines that are often used in micro hydro power plant. Numerical analysis with ANSYS CFX was conducted to view the effect of the spiral basin on the axial turbine to replace the function of the guide vane. The axial turbine with the guide vane and the axial turbine with the spiral basin are simulated with the same head, so that the characteristic changes in the turbine before and after the installation of the spiral basin can be seen. Based on simulated results, the largest power generated axial turbine is 5.5 kW with efficiency as high as 36.8%. This is achieved with a guide vane angle of 41° and a rotary speed of 150 rpm. Axial turbine with spiral basin installation is capable of generating 8.4 kW with efficiency as high as 46.5% at a rotary speed of 150 rpm. Thereby it can be concluded that the installation of Spiral basin in axial turbine can increase the performance of axial turbine.