CRDA PV-RO desalination stand-alone

Transcription

1 PVRO desalination standalone alone system in the village of Ksar Ghilène (Tunisia) M. Abdessalem EL KHAZEN Project Manager National Agency for Energy Conservation, ANME General aim of the project To improve the living conditions of the population of Ksar Ghilène, guaranteeing the constant supply of drinkable water by means of a desalination plant of brackish water fed energetically with photovoltaic solar energy. International Conference PROMEMBRANE Sfax Fair, th th May 1 Specifics objectives of the project The partners of the project To desalt brackish water using exclusively photovoltaic solar energy To create a structure of local nagement 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 National Agency for Energy Conservation (ANME) Regional Directorate for Agricultural Development of Kébili () Spanish International Cooperation Agency (AECI) Government of the Canary Islands Canary Islands Institute of Technology (ITC) Location Ksar Ghilène South of Tunisia, Kébili's Region, Sahara desert Infortion of interest of Ksar Ghilène Isolated village with inhabitant s placed near an oasis Activities: agriculture, cattle farming and tourism The nearest electrical grid is 1 km away Drinking water supply, by tankers coming from a well located km away It has one school, one mosque,, one National Guard office and one clinic Street lighting works with photovoltaic streetlamps Houses are electrified by Solar Home Systems 1

2 December First visit to Ksar Ghilène October September April Equipments transport Building construction 11 Civil engineering works beginning Project s definition 9 June 1

3 May June Assembly and start up 1 Practical training of local technicians 1 June May Official inauguration of the installation On June, the system began to work in isolated. On June, the fountains of the village was opened for the water supply to the population. Tunisian and installation Spanish authorities inaugurated officially the Presence of television, radio and press. 1 1 Installation description Design parameters: Water consumption: 1 m/day (summer) Average Global Horizontal radiation per year:, kwh/m² Ambient temperature: ºC Salinity of brackish water: Photovoltaic field Chargerinverter TDS mg/l Temperature of brackish water : Batteries ºC Mean equipments of the installation: Photovoltaic field (, kwp) Low pressure pump Batteries ( Ah C of capacity at V DC) Filtration Chemical Desalination plant m /day (,1 m/h) Drinkable water Recovery: % 1 Post treatment products Charger Inverter ( kw) ARTESIAN WELL Brackish water 1 Electric line High pressure pump Módulo OI Reject Hydraulic line

4 Infrastructures Electricity scheme SOLAR PHOTOVOLTAIC FIELD PANNEL DC V PANNEL AC V DC, Hz DC serie 1 º modules in serie AU1 AU D11 Modules: Isofoton I 1 / 1 V AU AU9 AU11 ºserie AU1 AU1 AU1 AU1 AU1 V DC IN PV IN PV IN BAT IN BAT Desalination plant P o we r BATTERIES E xt ern p ower Li gh ti n g INVERTER Ve nt il at i on Tg V en ti la t io n 1 OUT R OUT N INGECON HYBRID kw vasos V/elem, Ah ( C) Passive cooling architectural solution has been considered: Tg Semiburied building 19 Shade of the solar PV modules placed on the building roof RO desalination plant scheme RO desalination plant diagram RAW WATER ENTRY LOW LOW PRESSURE PRESSURE bar, m³ /h 1, kw ( mca m áx, 1 mca,, m /h) HIGH PRESSURE Filtration (sand & cartouches) Feed water conduction ( m) MICROFILTRATION <1 bar, m³/h kw (19 mca má x, 1 mca,, m /h) µm SODIUM WELL HYPOCHLORITE RAW WATER RESERVOIR FEED WATER SILEX FILTRE CARBON FILTRE ACID ANTISCALANT RO RO Module Module 1 x membranes ( ( )) Recovery: % ARTESIAN WELL Brackish water Drinkable water < ppm,,1 m ³/h 1 m³/day ( h) Brackish water s reject CLEANING RESERVOIR REVERSE OSMOSIS RO * Note: Specific theoric consumption :, kwh/m CHLORINE HIGH PRESSURE ph ADJUSTMENT WATER MIXING DRINKABLE WATER RESERVOIR REJECT 1 Main design desalination plant data DRINKABLE Drinkable water tank m WATER Drinkable water production: m /year Brackish water tanks 1 m Mean days of operation: days/year DESALINATION PLANT ROOM Desalination plant PHOTOVOLTAIC FIELD Hours of operation (winter): h/day Hours of operation (summer): h/day BATTERIES ROOM Batteries CONTROL ROOM Control room (equipments) Distribution of equipments

5 Main design operation PV field data Functioning System SIMULATION ENERGY BALANCE (SUMMER) Batteries PV production Consumptions Capacity (Ah) 9 Specific energy consumption (total):, kwh/m Pow er ( kw) 1 1 % Pd Initial % Pd Water production (m ) Days of operation Hours of operation TOTAL Since June, 1º year 1 1, º year 1,1 Mean 1 º year,9 m/day, days/month, h/day Mean º year, days/month, h/day % Pd 9 CURRENT ( A) VOLT AGE ( V) SIMULATION ENERGY FLOW 1 Operation desalination plant data Functioning System Bat te ries c apac ity (A h) Mean energy production: 1 kwh/day (Until March, ), m /day V.BAT PLANT STARTUP I.BAT IPV.T I.CONS PLANT STOP :1 9: 1º year: July June º year: July March : 11: 11: 1: 1: 1: 1: 1: 1: 1: 1:11 Operation desalination plant data: Comparison Operation desalination plant data: Conclusions Water is consumed less than can be produced. This assures the continuity of the water supply faced to possible increases of the dend Design Real Water production (m /year) Days of operation/year 1 Hours of operation/day We have successfully realized the project challenges: the hard clitic conditions, the high temperature variability (1 ºC) and its effects on the equipments, the high Fe and Mn concentrations of feed water, etc. Mean monthly temperatures Winter Design Real Design Real,, T ª (ºC ) Summer After, h of plant operation, there are not significant scaling and fouling on the membranes, although from the start up chemical cleaning has not been realized 1 9 j ul ag o se p o ct no v d ic e ne fe b r ab r y j un ju l a go se p oc t no v d ic en e feb r ab r j un y Dates

6 Principal benefits of the project Challenges of the project Pernence To train local technical personnel capable of realizing works of intenance Improvement of the living conditions: jor social stability and jor population accession. To implant a sustainable nagement of the water % of the energetic consumption of the installation, with photovoltaic solar power. Adaptation of the inhabitants to the new resource Not depending on fossil fuels (causers of the greenhouse gases and of the clitic world change). Continuation of the institutional support Correct nagement of the produced brine 1 Conclusions A successful project for supplying freshwater through a RO desalination unit driven by stand alone solar photovoltaic energy has been executed in Ksar Ghilène village, an isolated population of inhabitants in southern Tunisia. THANK YOU VERY MUCH After more than 1 months of operation the desalination plant has successfully produced more than, million litres of freshwater in more than, hours of operation. The system in this period has produced an average of,1 m/day with an energy consumption of 1 kwh. T él. : 1 1 Fax : 1 1 Eil : elkhazen@anme.nat.tn Web :