pvpv-ro desalination standro desalination stand--alone...

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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.

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(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

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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)

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(Kébili)Location

South of Tunisia, Kébili's Region,

Sahara desert

Ksar Ghilène

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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

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(Kébili)Evolution of the projectDecember 2003

First visit to Ksar Ghilène

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October 2004

Project’s definition

Evolution of the project

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(Kébili)June 2005

Civil engineering worksbeginning


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September 2005

Building construction


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(Kébili)Evolution of the projectApril 2006

Equipments transport

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(Kébili)May 2006

Assembly and start upEvolution of the project

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June 2006

Practical training of localtechnicians


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(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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Tunisian and Spanish authorities inaugurated officially theinstallation

Presence of television, radio and press.

May 2007

Official inauguration of theinstallation


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(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 %

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Electric line Hydraulic line

Lowpressurepump

Highpressure

pump

Chemicalproducts

Post -treatment

Photovoltaicfield

Batteries

Charger-inverter

Módulo OI

Filtration

Drinkablewater

RejectARTESIAN WELLBrackish water

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(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

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(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

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(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

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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

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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

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(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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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

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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

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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 )

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281320-350Days ofoperation/year

25374200-4500Water production

(m3/year)

RealDesign

3,354,257Hours ofoperation/day

RealDesignRealDesign

WinterSummer

Operation desalination plant data:Comparison

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(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

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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

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CRDA

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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

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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

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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)

pvpv-ro desalination standro desalination stand--alone...

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