DIRECT INTEGRATION OF RENEWABLE ENERGY INTO A REVERSE OSMOSIS PROCESS

DIRECT INTEGRATION OF DIRECT INTEGRATION OF RENEWABLE ENERGY RENEWABLE ENERGY

INTO A REVERSE INTO A REVERSE OSMOSIS PROCESSOSMOSIS PROCESS

DIRECT INTEGRATION OF A DIRECT INTEGRATION OF A RENEWABLE ENERGY INTO A R.O. RENEWABLE ENERGY INTO A R.O.

PROCESSPROCESS

WATER WATER DEMANDDEMAND

WATER WATER

EXCESSEXCESS

R.O. R.O. MODULEMODULE

RENEWABLRENEWABLE E

ENERGIESENERGIES

SEA SEA WATERWATER

PUMP

MOTOR

BRINBRINEEWHICH WILL BE THE QUALITY OF THE WHICH WILL BE THE QUALITY OF THE

PRODUCT WATER?PRODUCT WATER? HOW MUCH WILL THE SPECIFIC HOW MUCH WILL THE SPECIFIC CONSUMPTION OF ENERGY BE?CONSUMPTION OF ENERGY BE?

INDEX:INDEX:

AntecedentAntecedent ObjectiveObjective Description R.O. Description R.O.

plantplant First resultsFirst results ConclusionConclusion

ANTECEDENTANTECEDENT

Progressive increase of water Progressive increase of water consumption due to the increase of consumption due to the increase of population.population.

Increase of energy request (by fuel Increase of energy request (by fuel sources).sources).

Search of a sustainable development by Search of a sustainable development by the promoting the desalination techniques the promoting the desalination techniques with use of renewable energy for water with use of renewable energy for water production. production.

WHY IS DESALINATION SO WHY IS DESALINATION SO IMPORTANT AT PRESENT?IMPORTANT AT PRESENT?

ANTECEDENTANTECEDENT

The main drawback of the The main drawback of the renewable energies (Wind and renewable energies (Wind and PV): PV):

NOT GUARANTEE A CONTINUOUS NOT GUARANTEE A CONTINUOUS AND CONSTANT SUPPLY OF AND CONSTANT SUPPLY OF ENERGYENERGY

INDEX:INDEX:



OBJECTIVESOBJECTIVES

To observe the adjustment To observe the adjustment of an RO plant with a of an RO plant with a renewable energy source.renewable energy source.

Related to this work are the Related to this work are the projects: projects:

OPRODES and OPRODES and OPRORES. OPRORES.

INDEX:INDEX:



LOCALIZATIONLOCALIZATION

DESCRIPTION OF DESCRIPTION OF THE R.O. PLANTTHE R.O. PLANT

The main components The main components

are:are:

• HIGH PRESSURE HIGH PRESSURE

PUMPPUMP• MEMBRANES MEMBRANES

MODULEMODULE• SENSORS SENSORS • CONTROL SYSTEMCONTROL SYSTEM

An advance in the design of the plant An advance in the design of the plant would be the installation of an energy would be the installation of an energy recovery system.recovery system.

HIGH PRESSURE PUMPHIGH PRESSURE PUMP Positive displacement pump Positive displacement pump

with three stainless steel with three stainless steel piston pump. Power 30kW. piston pump. Power 30kW.

Maximum flow: 9.8 mMaximum flow: 9.8 m33/h. /h. Power ranges: 7-85 bar.Power ranges: 7-85 bar. System of pulleys with a System of pulleys with a

transmission relationship 4:1. transmission relationship 4:1.

CAT 6761

Motor r.p.m.

Pump r.p.m

Pressure (bar)

Flow (m3/h)

Power (kW)

Max. 1500 375 85 9.8 26.43 Min. 800 200 7 5.2 1.17

MEMBRANEMEMBRANE

KOCH - FLUID SYSTEMS KOCH - FLUID SYSTEMS TFC 2822-SSTFC 2822-SS Premium.Premium. (Spiral (Spiral polyamide).polyamide). 1 tube (6 metres long)1 tube (6 metres long) 6 6 membranesmembranes Max. Permeation 17mMax. Permeation 17m33/day. /day. Salt rejection 99.75% each. Salt rejection 99.75% each. Total area of 27.9mTotal area of 27.9m22..

INSTRUMENTATIONINSTRUMENTATIONControl equipment Range Observation

Transmitter of PH PHT 0-14 Seawater

TT 0-50ºC Seawater Brine Transmitter of temperature TT 0-50ºC Water

TC 0-2.000 S/cm Water Transmitter of conductivity TC 0-60.000 S/cm Seawater Brine

IP1 0-6 at Water Gauge +

Transmitter of pressure IP 0-100 at Seawater Brine

PDSH 0,2-6 at Seawater Presostate PSHD 25-80 at Seawater

IF-IT 60 m3/ day

5 at Water Transmitter of flow

IF-IT 150 m3/ day 80 at Brine

Reject valve V 150 m3/day 80 at Brine

VSD1 30 kW Variable speed driver VSD2 15 kW

PLC

GENERAL LAYOUTGENERAL LAYOUT

TP1

IP

PDSH PRETREATMENT

FILTER OF CARTRIDGE

SHOCK PHP

SEA-

WATER

PSHD

PHT TT

TC

TUBE OF

PRESSURE

PUMP

IP TP1 IF TF TC

IP1 TP TT IF TF TC

BRINE

PRODUCT

V

TANK OF

CLEANING

CONTROL SYSTEMCONTROL SYSTEM PLC –TSXMICRO3722 PLC –TSXMICRO3722 VSD-ATIVAR66VSD-ATIVAR66 REJECT VALVEREJECT VALVE SCADA-VIJEO LOOK SCADA-VIJEO LOOK

2.62.6

REJECT VALVEREJECT VALVE

TSXMICROTSXMICRO

37223722

CONTROL CONTROL DESKDESK

&&

ALTIVAR ALTIVAR 6666

OPERATION RANGE OPERATION RANGE OF THE PLANTOF THE PLANT

Minimum operating pressure – 30 bar.Minimum operating pressure – 30 bar. Maximum operating pressure – 68 bar.Maximum operating pressure – 68 bar. Minimum recovery – 15%.Minimum recovery – 15%. Maximum recovery – 50%.Maximum recovery – 50%. Minimum electric motor r.p.m. – 800 Minimum electric motor r.p.m. – 800

r.p.m.r.p.m. Maximum electric motor r.p.m. – 1500 Maximum electric motor r.p.m. – 1500

r.p.m.r.p.m. Minimum power consumptionMinimum power consumption – – 5.5 kW.5.5 kW. Maximum power consumptionMaximum power consumption – – 21.5 kW.21.5 kW.

ENERGY RECOVERYENERGY RECOVERY

TP1

IP

PDSH PRETREATMENT

FILTER OF CARTRIDGE

SHOCK

VSD1

PHP

SEA-

WATER

NE

T O

F S

UP

PL

Y PSHD

PHT TT

TC

TUBE OF

PRESSURE

PUMP

IP TP1 IF TF TC

IP1 TP TT IF TF TC

BRINE

PRODUCT

V

TANK OF

CLEANING

VSD2 T G

1

2

DC

BU

S

INDEX:INDEX:

AntecedentAntecedent ObjectiveObjective Description R.O Description R.O

plant.plant. First resultsFirst results ConclusionConclusion

FIRST RESULTS (1)FIRST RESULTS (1)

Graphics of Graphics of results results

The consumption of The consumption of kW/mkW/m33 of product water of product water decreases for higher decreases for higher working pressures.working pressures.

1,0

2,0

3,0

4,0

5,0

6,0

7,0

30 40 50 60 70 80

Pressure( bar)

P roduct Flow kWinlet/m3

P olinomic(kWinlet/m3) P olinomic(P roduct Flow)

PRODUCT FLOW AND PRODUCT FLOW AND SPECIFICSPECIFIC CONSUMPTIONCONSUMPTION

FIRST RESULTS (2)FIRST RESULTS (2)

Graphics of resultsGraphics of results

0

2

4

6

8

10

12

8 10 12 14 16 18 20 22

kWinlet

m3/

h

0

10

20

30

40

50

60

% R

eco

very

Reject Flow (Qreject) Feed flow (Qtinlet) Recovery

Polinomic(Recovery) Polinomic(Qinlet) Polinomic(Qreject)

FEED FLOW, REJECT FEED FLOW, REJECT FLOW AND RECOVERY FLOW AND RECOVERY

FACTORFACTOR

For high pressures:For high pressures:

- - Quality of Quality of

water water

- - Energy Energy

- - kW/m kW/m33

42%

INDEX:INDEX:



CONCLUSIONS (1)CONCLUSIONS (1)

Our RO plant, which works under Our RO plant, which works under variable load, shows us that the optimum variable load, shows us that the optimum performance of the plant (recovery 42%) performance of the plant (recovery 42%) is between 16 and 18 kW, working is between 16 and 18 kW, working pressure from 57 to 67 bars.pressure from 57 to 67 bars.

In these conditions the specific In these conditions the specific consumption oscillate into a range of 4.1 consumption oscillate into a range of 4.1 to 4.7 kW/mto 4.7 kW/m33, and a maximum water , and a maximum water production of 4.2 mproduction of 4.2 m33/h/h

The kinetic energy in brine flow is high, so The kinetic energy in brine flow is high, so the installation of an energy recovery is the installation of an energy recovery is highly recommended.highly recommended.

We will install the most suitable energy We will install the most suitable energy recovery for our plant, which is the Pelton recovery for our plant, which is the Pelton turbine.turbine.

We think we will obtain an energy recovery We think we will obtain an energy recovery between 20-30% for our variable load between 20-30% for our variable load plant. plant.

CONCLUSIONS (2)CONCLUSIONS (2)

UNIVERSITY OF LAS UNIVERSITY OF LAS PALMAS DE GRAN PALMAS DE GRAN

CANARIACANARIA

Lidia Segura and Antonio GómezLidia Segura and Antonio Gómez

Department of Process EngineeringDepartment of Process Engineering

[email protected]@ulpgsc.es

[email protected]@dip.ulpgc.es

Ignacio de la NuezIgnacio de la Nuez

Department of Electronic Department of Electronic and Automatic Engineeringand Automatic Engineering

[email protected]@diea.ulpgc.es



QUESTIONSQUESTIONS

DIRECT INTEGRATION OF RENEWABLE ENERGY INTO A REVERSE OSMOSIS PROCESS

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