A Feasibility Study - Aaltodoc - Aalto-yliopisto

The minimum cost of water 0,6 €/m³ is achieved at the end of the study area with a
nominal pump capacity of 0,24 m³/s and a load factor of 0,95. The cost curve in Site 4 is
downward so that the price seems to be stabilizing to the minimum value of 0,6 €/m³.
This is logical since the load factor remains high all throughout the study area as the
permeate production steadily increases. Basically at the end of the study area the rising
costs and the increasing permeate production cancel each other out, resulting in the
minimum price of 0,6 €/m³. Figure 49 presents the cost of water on Site 4.
Cost of water (€/m³)
2
1,8
1,6
1,4
1,2
1
0,8
0,6
0,4
0,2
0
Cost of Water (€/m³)
Load factor (%)
0
0 0,05 0,1 0,15 0,2 0,25 0,3
WaveRoller nominal pump capacity (m³/s)
Figure 49. Cost of water (€/m³) on Site 4.
With the nominal pump capacity of 0,24 m³/s, the RO system has 62 pressure vessels
and in total 434 RO membranes. The nominal production of 434 RO membranes is
10 850 m³/day. The cost breakdown of Site 4 with a nominal pump capacity of 0,24
m³/s is presented in Table 9.
Table 9. Cost breakdown of Site 4.
Capital expenses (€) Operational expenses (€)
WEC 3 440 000 170 000
RO 1 290 000 200 000
Total 4 730 000 370 000
Annual 440 000 370 000
66
1,2
1
0,8
0,6
0,4
0,2
Load factor