| Abstrak/Abstract |
The development of screw turbines for micro-hydro power generation has garnered
heightened interest lately, attributed to their capability to perform efficiently despite
low head and low discharge. The present numerical work aims to evaluate the
prospect of low-head water energy widely available in the Aceh region. In this region,
the Archimedes Screw turbine is the most commonly used. In the present numerical
study, the characteristics of the Archimedes screw turbine were studied under the
constant of the head of 1 meter and the inclination angle of 30o, with the flow rate
served as the varying parameter. In the simulation, a three-dimensional numerical
investigation of pressure characteristics, flow velocity, and kinetic energy turbulence
due to the change in the flow rates was carried out using the Navier-Stokes equations.
Next, the turbulence model of K-Epsilon was also implemented. The comparisons
between the experimental and the simulation results were carried out to ensure the
accuracy of the simulation model, and the results indicated that the changes in flow
rates have a marked influence on pressure distribution, the flow velocity field, and
turbulent kinetic energy. It was found that the performance of the Archimedes double
screw turbine was improved by increasing the flow rate due to the uniform distribution
of pressure, flow velocity, and turbulent kinetic energy. Moreover, the optimum
condition was achieved in a turbine with 8 screws. Therefore, maintaining the inflow
rate is crucial as it significantly impacts the efficiency of the Archimedes Screw Turbine. |
