A Feasibility Study - Aaltodoc - Aalto-yliopisto

Cost of water (€/m³)
1,6
1,4
1,2
1
0,8
0,6
0,4
0,2
0
Figure 43. Cost of water (€/m³) on Site 1
The capital cost for the entire AaltoRO system with a nominal pump capacity of 0,12
m³/s is 3 260 000 €. The breakdown of the cost structure is presented in Table 6. The
WEC cost factor includes – in addition to the WEC – the two APGs needed for
continuous operation as well as the medium pressure piping. The operational expenses
for the WEC have been calculated by assuming them to be 5 % of the capital expense,
since no exact data is available. The RO cost factor includes the pressure vessels, the
RO membranes, pre- and post-treatment facilities, the ERD, as well as automation and
control system costs. The operational expenses for the RO have also been calculated
with a percentage share of the capital expenses, in this case 13 % of the capital
expenses.
9.5 Site 2
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)
Table 6. Cost breakdown of Site 1 with a nominal pump capacity of 0,12 m³/s.
Capital expenses (€) Operational expenses (€)
WEC 2 460 000 120 000
RO 800 000 100 000
Total 3 260 000 220 000
Annual 310 000 220 000
Site 2 has a moderate wave climate, with an average wave power of 9,5 kW/m. The
performance and retention curves of Site 2 have been given in the Appendix B. The
calculation presented in this Chapter follows the calculation method described in
Chapter 9.1. The average recovery rate in all the calculations on Site 2 has been 29,4 %
and the average permeate TDS is 156 mg/l, which is well below the limit of 500 mg/l.
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1,2
1
0,8
0,6
0,4
0,2
Load factor