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PVPV--RO desalination standRO desalination stand--alonealonesystem in the village of Ksarsystem in the village of Ksar
GhilGhilèène (Tunisia)ne (Tunisia)
M. Abdessalem EL KHAZENProject Manager
National Agency for Energy Conservation, ANME
International Conference PROMEMBRANE
Sfax Fair, 4th - 6 th May 2008CRDA
(Kébili)2
CRDA
(Kébili)General aim of the project
To improve the living conditions of thepopulation of Ksar Ghilène,guaranteeing the constant supply ofdrinkable water by means of adesalination plant of brackish water fedenergetically with photovoltaic solarenergy.
3
CRDA
(Kébili)
To desalt brackish water using exclusively
photovoltaic solar energy
To create a structure of local management that
guarantees the correct functioning of the installation
To achieve the social acceptance of the inhabitants
To be a pioneering pilot experience in the country
and of international reference
Dissemination of the results
Specifics objectives of the project
4
CRDA
(Kébili)
The partners of the project
National Agency for Energy Conservation (ANME)
Regional Directorate for Agricultural Development ofKébili (CRDA)
Spanish International Cooperation Agency (AECI)
Government of the Canary Islands
Canary Islands Institute of Technology (ITC)
5
CRDA
(Kébili)Location
South of Tunisia, Kébili's Region,
Sahara desert
Ksar Ghilène
6
CRDA
(Kébili)Information of interest of Ksar Ghilène
Isolated village with 300 inhabitantIsolated village with 300 inhabitant’’s placed near ans placed near an
oasisoasis
Activities: agriculture, cattle farming and tourismActivities: agriculture, cattle farming and tourism
The nearest electrical grid is 150 km awayThe nearest electrical grid is 150 km away
Drinking water supply, by tankers coming from a wellDrinking water supply, by tankers coming from a well
located 60 km awaylocated 60 km away
It has one school,It has one school, one mosqueone mosque, one National Guard, one National Guard
office and one clinicoffice and one clinic
Street lighting works with photovoltaic streetlampsStreet lighting works with photovoltaic streetlamps
Houses are electrified by Solar Home SystemsHouses are electrified by Solar Home Systems
2
7
CRDA
(Kébili)
8
CRDA
(Kébili)Evolution of the projectDecember 2003
First visit to Ksar Ghilène
9
CRDA
(Kébili)
October 2004
Project’s definition
Evolution of the project
10
CRDA
(Kébili)June 2005
Civil engineering worksbeginning
Evolution of the project
11
CRDA
(Kébili)
September 2005
Building construction
Evolution of the project
12
CRDA
(Kébili)Evolution of the projectApril 2006
Equipments transport
3
13
CRDA
(Kébili)May 2006
Assembly and start upEvolution of the project
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CRDA
(Kébili)
June 2006
Practical training of localtechnicians
Evolution of the project
15
CRDA
(Kébili)Evolution of the project
On June 25, the system began to work in isolated.
On June 26, the fountains of the village was opened for the watersupply to the population.
June 2006
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CRDA
(Kébili)
Tunisian and Spanish authorities inaugurated officially theinstallation
Presence of television, radio and press.
May 2007
Official inauguration of theinstallation
Evolution of the project
17
CRDA
(Kébili)Installation descriptionDesign parameters:
Water consumption: 15 m3/day (summer)
Average Global Horizontal radiation per year: 5,6 kWh/m²
Ambient temperature: 0 – 60 ºC
Salinity of brackish water: 5700 TDS – 3500 mg/l
Temperature of brackish water : 28 – 35 ºC
Mean equipments of the installation:
Photovoltaic field (10,5 kWp)
Batteries (660 Ah C10 of capacity at 120VDC)
Charger- Inverter (10 kW)
Desalination plant 50 m3/day (2,1 m3/h)
Recovery: 70 %
18
CRDA
(Kébili)
Electric line Hydraulic line
Lowpressurepump
Highpressure
pump
Chemicalproducts
Post -treatment
Photovoltaicfield
Batteries
Charger-inverter
Módulo OI
Filtration
Drinkablewater
RejectARTESIAN WELLBrackish water
4
19
CRDA
(Kébili)Infrastructures
Passive cooling architectural solution has been considered:
Semi-buried building
Shade of the solar PV modules placed on the building roof20
CRDA
(Kébili)Electricity scheme
Modules: Isofoton I -150 / 12 V
-
+ -
+ -
+
10 modulesin serie
+ - + - + -
+ -
60 vasos 2V/elem, 660 Ah ( C10)
serie 1º
7 ºserie
+
-
+
IN + BAT
SOLAR PHOTOVOLTAIC FIELD
BATTERIESINVERTER
OUT R
OUT NIN - BAT
+-
+ -
-
+
IN + PVIN - PV
-
120 V DC
-
PANNEL DC120V DC
Tg
Tg
PANNEL AC230V DC , 50Hz
Ligh
ting
-+-
AU01 AU07
AU10 AU09
- + +
+
+ -
AU11
D011
AU12 AU13AU13 AU14
Po
wer
Ven
tilatio
n1
Vent
ilati
on2
De
sal
ina
tio
np
lan
t
AU15
Ext
ern
pow
er
INGECON HYBRID 10 kW
21
CRDA
(Kébili)RO desalination plant scheme
RO ModuleRO Module1 x 3 membranes (81 x 3 membranes (8””))
3 bar, 3 m³/h1,65 kW (54 mca máx,
41 mca, 4,5 m 3/h)Filtration
(sand & cartouches)
Drinkable water<500 ppm, 2,1 m³/h
15 m³/day (7 h)
Brackish water’sreject
HIGH PRESSUREHIGH PRESSUREPUMPPUMP
LOW PRESSURELOW PRESSUREPUMPPUMP
<15 bar, 3 m³/h4 kW (197 mca máx ,154 mca, 5,8 m3 /h)
ARTESIAN WELLBrackish water
Feed water conduction(2 000 m)
Recovery: 70%
Note: Specific theoric consumption : 2,3 kWh/m3
22
CRDA
(Kébili)RO desalination plant diagram
REJECT
REVERSE OSMOSIS
RO 3*8040
ACIDCARBONFILTRE
SILEXFILTRE
WATERMIXING
pHADJUSTMENT
CHLO-RINE
HIGH PRESSUREPUMP
WELL
MICRO-FILTRATION
5 µm
CLEANINGRESERVOIR
RAW WATERRESERVOIR
RAW WATER ENTRY
DRINKABLEWATER
RESERVOIR
FEED WATERPUMP
ANTISCALANTSODIUMHYPOCHLORITE
23
CRDA
(Kébili)
Distribution of equipments
Drinkable watertank 50 m 3
Desalination plant
Control room
(equipments)Batteries
Brackish watertanks 15 m3
DRINKABLEWATER
DESALINATIONPLANT ROOM
BATTERIESROOM
CONTROLROOM
PHOTOVOLTAIC FIELD
24
CRDA
(Kébili)
Main design desalination plant data
Drinkable water production: 4 200 – 4 500 m3/year
Mean days of operation: 320 – 350 days/year
Hours of operation (winter): 5 h/day
Hours of operation (summer): 7 h/day
5
25
CRDA
(Kébili)Main design operation PV field data
• Mean energy production: 26 –51 kWh/day
• Specific energy consumption (total): 2,3 kWh/m3
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CRDA
(Kébili)
Functioning SystemSIMULATION ENERGY BALANCE (SUMMER)
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
0 2 4 6 8 10 12 14 16 18 20 22 0 2 4 6 8 10 12 14 16 1820 22 0 2 4 6 8 10 12 14 16 18 20 22 0 2 4 6 8 10 12 14 16 18 2022
Po
wer
(kW
)
200
220240260280
300320340
360380400
420440460480
500520540
560580600
620640660
Bat
teri
esc
apac
ity(A
h)
Batteries PV production Consumptions Capacity (Ah)
70% Pd
60% PdInitial
27
CRDA
(Kébili)
Functioning System
SIMULATION ENERGY FLOW
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
8:15 9:00 10:00 11:00 11:40 12:00 13:00 14:00 15:00 16:00 17:00 18:54 18:11
VO
LTA
GE
(V)
- 50
- 40
- 30
- 20
- 10
0
10
20
30
40
50
60
70
80
90
100
CU
RR
ENT
(A)
V.BAT
I.BAT
IPV.T
I.CONS
70% Pd
PLANT START-UP
PLANT STOP
28
CRDA
(Kébili)
1º year: July 06- June 072º year: July 07- March 08
Operation desalination plant data
3,7 h/day22,4 days/month7,4 m3/dayMean 2 º year
3,7 h/day23,4 days/month6,9 m3/dayMean 1 º year
1014,120220282 º year(Until March, 2008)
1356,528125371º year
2370,64834565TOTAL
Since June 06
Hours ofoperationDays of operation
Water production(m3 )
29
CRDA
(Kébili)
281320-350Days ofoperation/year
25374200-4500Water production
(m3/year)
RealDesign
3,354,257Hours ofoperation/day
RealDesignRealDesign
WinterSummer
Operation desalination plant data:Comparison
30
CRDA
(Kébili)Operation desalination plant data:Conclusions
Water is consumed less than can be produced. This assures the continuity of thewater supply faced to possible increases of the demand
After 2370,6 h of plant operation, there are not significant scaling and fouling onthe membranes, although from the start up chemical cleaning has not beenrealized
We have successfully realized the project challenges: the hard climaticconditions, the high temperature variability (15-35 ºC) and its effects on theequipments, the high Fe and Mn concentrations of feed water, etc.
Mean monthly temperatures
0
510
15
20
2530
35
may
- 06
jun
- 06
jul-
06a
go-0
6s
ep-0
6o
ct-0
6n
ov- 0
6d
ic- 0
6e
ne- 0
7f e
b-0
7m
ar -
07ab
r -07
may
- 07
jun
- 07
j ul-
07a
go- 0
7s
ep-0
7o
c t-0
7n
ov-0
7d
ic- 0
7e
ne-0
8fe
b- 0
8m
ar-
08ab
r-08
Dates
Tª(
ºC)
6
31
CRDA
(Kébili)
Challenges of the project - Permanence
To train local technical personnel capable of realizing works ofmaintenance
To implant a sustainable management of the water
Adaptation of the inhabitants to the new resource
Continuation of the institutional support
Correct management of the produced brine
32
CRDA
(Kébili)
Improvement of the living conditions: major social stability andmajor population accession.
100 % of the energetic consumption of the installation, withphotovoltaic solar power.
Not depending on fossil fuels (causers of the greenhouse gases andof the climatic world change).
Principal benefits of the project
33
CRDA
(Kébili)
A successful project for supplying freshwater through a ROdesalination unit driven by stand alone solar photovoltaic energy hasbeen executed in Ksar Ghilène village, an isolated population of 300inhabitants in southern Tunisia.
After more than 21 months of operation the desalination plant hassuccessfully produced more than 4,5 million litres of freshwater in morethan 2,300 hours of operation. The system in this period has produced anaverage of 7,1 m3/day with an energy consumption of 15 kWh.
Conclusions
34
CRDA
(Kébili)
THANK YOU VERY MUCHTHANK YOU VERY MUCH
Tél. : +216 71 787 700
Fax : +216 71 784 624
Email : [email protected]
Web : www.anme.nat.tnCRDA
(Kébili)