TIDAL TURBINE CONFIGURATION ANALYSIS AT LARANTUKA STRAIT, EAST NUSA TENGGARA, INDONESIA
Continuous use of fossil fuels has proven to have a significant impact on the climate. Indonesia has declared its commitment in achieving net-zero emissions by 2060 as an effort to reduce the effects of climate change. One of the strategies implemented is the transition to new and renewable energ...
Saved in:
| Main Author: | |
|---|---|
| Format: | Final Project |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/66981 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Continuous use of fossil fuels has proven to have a significant impact on the
climate. Indonesia has declared its commitment in achieving net-zero emissions by
2060 as an effort to reduce the effects of climate change. One of the strategies
implemented is the transition to new and renewable energy, such as tidal stream
energy. Research conducted shows that one of the strongest tidal currents is located
at Larantuka Strait. This thesis aims to assess the resources available at Larantuka
Strait using the Linear Momentum Actuator Disc Theory (LMADT) in a parallelsided
tube and analyze the power generated for various tidal turbine configurations.
The research is limited to the analysis of turbine configurations in a fence
formation. The assessment is conducted in two ways: two-dimensional
hydrodynamic modeling using TELEMAC2D and simplified as a one-dimensional
model using the Runge-Kutta method. Based on the results for May 2022, the
location has a maximum tidal current velocity of 2.67 m/s and an average velocity
of 1.6 m/s. The thesis evaluates three types of commercial turbines: Tocardo T1,
Tocardo T2, and SCHOTTEL HYDRO, using the one-dimensional model
calculation with the Runge-Kutta method. The evaluation proves that the blockage
ratio, an important parameter in this research, has an important effect on power
production. As the blockage ratio increases, the power production initially
increases, but then decreases approaching zero as the ratio advances to 1. This
happens because the thrust asserted by the turbines gets stronger with the increase
of blockage ratio, reducing the current velocity along the turbine, thus lowering the
amount of power produced. Moreover, high values of thrust generated to create a
need for a more resilient power extraction structure. Another important parameter
in this theory is the turbine wake velocity coefficient ?4, which represents the ratio
of the turbine flow velocity after it passes the turbines to the initial velocity.
Calculations showed that for the model, the maximum power was achieved for ?4
= 0.33. Based on the research, the optimal blockage ratio for power extraction is
0.25, which results in 2 GWh of power in May 2022, or roughly 24 GWh per year |
|---|