DESIGN AND NUMERICAL SIMULATION OF PROPELLER HYDRO TURBINE WITH 2M HEAD AND 0.66 M3/S FLOWRATE

• Main Author: Saraswati, Athira
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/50158
• Institution: Institut Teknologi Bandung

The national electrification ratio in Indonesia has reached 98.86% by the end of 2019. The remaining are mainly from rural areas. Thus, energy potential such as hydro energy in micro hydro power plant shall be utilized. Micro hydro power plant is suitable for rural areas due to its small-scale equipment and areas. Hydraulic turbine is one of the main components in micro hydro. There are several types of hydraulic turbines with different head range for each operation. Propeller hydro turbine has the lowest head range of 2 to 40 m, making it suitable for rural regions with limited available area. The method of designing propeller hydro turbine in this final project begins by the determination of the rotational speed, blade angle and airfoil type. Then proceeds to the calculation of components’ dimensions and designing the turbine components. The turbine is modelled with the aid of modelling software SOLIDWORKSTM. Then computational fluid dynamics (CFD) simulation is performed using ANSYS Fluent. The simulations were performed at two stages, in which the first stage was to simulate four different models of turbine with four different rotor profile then select the model with the highest efficiency while the second stage was to obtain the characteristic curve of the selected turbine. The simulation result show that the propeller hydro turbine with 2 m head and 0.66 m3/s flowrate gives the highest efficiency of 83.30% with power 7.43 kW at rotational speed of 200 RPM. The blade profile used at the rotor is NACA 4412. The results also show the presence of pressure drop at the stator and rotor which is one of the main characteristics of reaction turbines.