A Feasibility Study - Aaltodoc - Aalto-yliopisto

10 Results and discussion
The objective of the Feasibility Study part of this thesis was to study the AaltoRO
system from the financial point of view. The permeate production and the cost of the
produced water were calculated in four different locations and the results from each Site
presented in the previous Chapter. The purpose of this Chapter is to reflect on those
results and to draw conclusions about the general feasibility of AaltoRO.
The permeate production in each Site is presented in Figure 50. From there it is clear
that Site 4 is the most productive one while Site 2 is the worst. Only Site 4 experienced
linear growth during the entire study area while, Site 2 has practically stable production,
despite the increase in nominal pump capacity. Sites 1 and 3 were both good, but still
Site 1 with a smaller wave power level (15 kW/m) had a higher peak production than
Site 3 (16 kW/m).
Fresh water (m³/day)
4000
3500
3000
2500
2000
1500
1000
500
0
0 0,05 0,1 0,15 0,2 0,25 0,3
WaveRoller nominal pump capacity (m³/s)
Figure 50. The permeate production (m³/day) on each Site.
The load factor on each Site is presented in Figure 51. With the load factors the
situation is almost similar than with the permeate production. Site 4 has a superior load
factor throughout the study area compared with the other Sites. Only Site 1 can keep up
until the nominal pump capacity of 0,15 m³/s, roughly half of the study area. However,
Site 3 has a better load factor at the end of the study area than Site 1. Site 2 is clearly the
weakest of the areas, ending with a load factor of 0,43 with a nominal pump capacity of
0,24 m³/s.
67
Site 1
Site 2
Site 3
Site 4