Investor Presentaiton
Energies 2019, 12, 3658
20 of 37
Table 3. Average values of the ocean current power density (W/m²), standard deviation (±),
seasonal variability (SV), and coefficient of variation (COV) for each coastline region-A, B, C and
D―for each season (summer, autumn, winter, and spring) between January 1, 2007 and December
31, 2017.
Power Density (W/m²) ± Standard Deviation
ᏚᏙ
COV
Region/Season
Summer
Autumn
Winter
Spring
ABCD
98.9 (±3.3)
73.67 (±2.12)
74.35 (+2.12)
362.76 (±9.9)
90.06 (±3.83)
167.37 (±5.6)
97.85 (±2.7)
280.25 (±7.8)
0.269 0.951
0.609 1.994
193.93 (±3.84)
788.21(±39.15)
399.93 (±11.1)
1416.64 (±58.28)
379.137 (±11.06)
216.36 (±5.06)
0.426
1.460
1240.21 (±58.82)
1103.4 (±52.3)
0.514
1.333
9°N
9°S
18°S
27°S
Annual
Summer
1000
Autumn
900
800
700
600:
500
Winter
Spring
400
0
300
200
100
Current Density (W/m²)
50°W 45°W 40°W 35°W 30°W 25°W
Figure 14. Annual and seasonal (summer, autumn, winter, and spring) mean power density (W/m²) at
the Brazilian coastline between January 1, 2007 and December 31, 2017.
4.1.2. Wave Energy
Figure 15 shows the average annual and seasonal wave power density values. The hindcast
shows the variability of the energy resource and provides a holistic view of the wave climate along the
Brazilian coast. It can be observed that the most energetic wave areas are located near the regions A
and B coasts with a power value between 20 and 25 kW/m. This is intensified during the autumn and
winter seasons. This fact is directly related to the increase in the occurrence of extratropical cyclones
that generate larger waves that propagate toward these Brazilian regions. The nearshore areas of
region A (areas with a water depth of less than 100 m) have values close to 20 kW/m for almost the
entire year. This is mainly due to the preponderance of south winds combined with the shoreline
orientation that induces strong swells near the coast. The average values of the SV and COV related to
the wave power were calculated and are illustrated in Table 4 for five different bathymetries of 25,
50, 100, 150, and 200 m along the Brazilian coast. It can be observed that, independently of the water
depth, the seasonal variability (SV) of the regions A and B is always smaller than that of the regions
D and C. On the other hand, the minimum COV occurs in the region C, while the region D has aView entire presentation