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General information |
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| Name |
Multi-Stage Desalination Plant (CuveWaters)
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| Country installed |
Namibia
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| Address |
Akutsima
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| Industry sector, NACE code |
E - Water supply; sewerage; waste managment and remediation activities
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| Solar thermal system owner / operator |
Namibian Ministry of Agriculture, Water and Forestry (MAWF)
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| Solar thermal engineering company |
Solar-Institut Juelich; Ingenieurbüro für Energie- und Umwelttechnik Juelich
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| Process integration engineering company |
Solar-Institut Juelich; Ingenieurbüro für Energie- und Umwelttechnik Juelich
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| Year of operation start |
2010
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Technical parameters |
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| Collector technology |
flat plate collector
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| Collector name |
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| Installed collector area (gross), m² |
39.0
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| Installed collector area (aperture), m² |
35.0
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| Installed collector area (absorber), m² |
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| Installed thermal power (estimated), kWth |
27.3
(Default value calculated by multiplying the gross collector area by 0.7 kWth/m²)
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| Solar collector loop heat transfer fluid |
water
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| Solar energy storage |
short-term water storage
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| Storage volume, m³ |
0.5
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| Kind of conventional heat source |
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| Kind of fuel used |
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Process |
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| Solar thermal energy used for |
Desalination
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| Unit operation |
evaporation and distillation
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| Point of Solar Heat Integration |
B2) Heating of process medium (please specify)
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| --> Integration how and where |
Direct heating of process medium (water) in flat plate collectors
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| --> Temperature range process |
up to 100 °C
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| --> Temperature range solar loop (min/max), C° |
from ambient temperature up to 100 °C
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Economic parameters |
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| Total investment costs (excl. VAT), € |
40,000.00
(Turnkey costs including solar collectors, piping, support construction, storage, design, commissioning reduced with subsidies)
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| Solar loop (excl. VAT), € |
10000
(Solar collectors, piping, support construction)
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| Solar energy storage (excl. VAT), € |
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| Others (excl. VAT), € |
(Design, commissioning, others)
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| Process integration (excl. VAT), € |
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| Subsidy, € or % of total investment costs |
100%
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| Cost for fuel replaced, €/MWhfuel |
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| Calculated solar thermal system life time, a |
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| Annual useful solar heat delivery, MWh/a |
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| Specific annual useful solar heat delivery, MWh/am² |
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| Specific investment costs, €/m² |
1025.64
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| Solar fraction, % |
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Lessons learned |
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| Initiative |
The multi-stage desalination process was developed by the partners from the beginning as a process that can be efficiently operated with solar heat. Within the framework of a research project, the opportunity arose to develop and build these systems for application in Namibia.
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| Integration methodology |
The multi-stage desalination process is well suited to be driven by solar thermal collectors, as the temperature requirements are low. Since the multi-stage desalination is intended for use in remote regions, the independent supply of solar heat is ideal.
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| Crucial Interfaces |
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| Construction / Commissioning |
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| Operation / Performance |
The production meets the expectations and a daily production capacity of 500 liters is achieved on days with good solar irradiation.
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| Recommendations |
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SHIP Plants
