Investor Presentaiton
Energies 2019, 12, 3658
22 of 37
the Brazilian wave power. In practice, only a fraction of this value can be extracted by the wave
energy devices, which depends on different issues such as technical challenges, environmental impacts,
economy, deferent use of the sea area, and social impacts. Nevertheless, only one-fifth of this potential
is equal to approximately 35% of the Brazilian electricity demand in 2017 [183].
Table 5. Available wave power of the Brazilian coastline.
Regions
Parameters
A
B
C
D
Length (km)
~1250
Average power (kW/m)
Total power (GW)
21.1
26.4
24.2
~1952 ~1452 ~2837
12.4
13.8
7.4
20.1
21.0
4.1.3. Ocean Thermal Energy
Figure 16a shows the annual average AT (°C) between the water depth of 20 and 1000 m along the
Brazilian coast. The results show that, except for the extreme South below 27 °S, the yearly average AT
is always about 20 °C or higher along the Brazilian coast. The average gross power of a 10 MW OTEC
plant (see Section 2.2.1) was calculated for 12 locations along the coastline. The selected points were
located approximately at a distance between 30 and 200 km to the shore and had an annual average AT
at between 20 and 1000 m of water depth of more than 20 °C. Figure 16b illustrates the annual variation
in the gross power for the considered points. A greater average annual gross power, represented by the
red solid line, can be observed for the regions D and C comparing to the regions A and B. Moreover, the
results show smoother power production for the regions D and C comparing to the regions A and B.
Table 6 shows the characteristics of the selected points as well as the P
Pgross and Pnet
Latitude
9°N
0°
9°S
P12
P11
P7
P6
18°S
27°S
P2
P1
P3.
P4.
P9
24
23
22
22
21
221
20
6
18
17
16
(MW)
d
P10 P11-P12-Annual Avg.
20
15
(D
10
gross
15
(MW)
20
20
AT (°C)
d
1
gross (MW)
20
20
P
(MW)
10
20
P7 P8 P9 Annual Avg.
(C)
P4 P5 P6 Annual Avg.
(B)
P1 P2 P3 Annual Avg.
gross
15
(A)
15
50°W 45°W
40°W 35°W 30°W
Longitude
(a)
25°W
19 Jan Feb Mar Apr May Jun Jul Ago Sep Oct Nov Dec
(Month)
(b)
Figure 16. (a) Annual mean AT (°C) between 20 and 1000 m and (b) the annual ocean thermal energy
conversion (OTEC) Gross Power Density (PG in MW) at a depth of 1000 m considering the period
between January 1, 2007 and December 31, 2017.View entire presentation