Temperature - European Investment Bank

WEST AFRICAN POWER POOL (WAPP) PÖYRY ENERGY LTD.
Mount Coffee HPP ESIA and RAP 2012-09-18
ESIA Report Page 176
m³/s
Figure 24-1: River flow and plant operating conditins, 80 MW
m³/s
4'000
3'500
3'000
2'500
2'000
1'500
1'000
500
160
140
120
100
80
60
40
20
80 MW, year
0
0.00 20.00 40.00 60.00 80.00 100.00
% exceedance
80 MW, low flow situation
0
70.00 75.00 80.00 85.00 90.00 95.00 100.00
% exceedance
Figure 24-2: Plant operating conditions, 80 MW, low flow situation
river flow
4 units 100%
load following
river flow
available flow
residual flow
1 unit 100%
1 unit 40%
The main consequences of this alternative, therefore, can be summarised as follows:
� There would be a considerable increase in electricity generation. The technical
assessment of the project will have to determine if this increase justifies the
increase in investment costs.
� The power plant would pass more water through the turbines, thus reducing the
"loss" of spilling.