Enviria.com BladeCleaning® - Limpieza de palas The solution to power loss BladeCleaning ® ...

enviria.com BladeCleaning® - Limpieza de palasBladeCleaning® - Limpieza de palas

The solution to power loss

BladeCleaning®

www.bladecleaning.com

Limpieza de Palas

enviria.com BladeCleaning® - Limpieza de palas

JUSTIFICATIONDouble Stall – Aerodynamic failure

enviria.com BladeCleaning® - Limpieza de palasBladeCleaning® - Limpieza de palas 33

Double Stall – Aerodynamic failurePower losses up to 50 % from wind speeds over 10

m/s.

Normal power curve

Double Stall affected power curve


Double Stall – CauseAccumulation of insects on the leading edge of the

blades


Double Stall – Consequences

Expected consequences inwind farm management


Double Stall – Process

Low wind speedInsects fly around the turbines attracted by the colour

and brightnessRotating blades pass by the clouds of insects causing

accumulation of dirt on the leading edgeHigh wind speed

Insects do not fly at high wind speedsBlade roughness causes an unexpected aerodynamic

failure (double stall)


Double Stall – References

Double stall caused by insects is widely documented


SOLUTION APPROACHBladeCleaning® System


Double Stall – Solutions

Manual cleaning of the blades produces the recovery of the turbine’s power curve



Manual cleaning is unsuitable:

Turbine has to be stoppedNo wind is required to operateA minimum of three workmen is neededCleaning time: 4 hours/WTGTurbine is loosing power until conditions are appropriate to

perform a manual cleaningHigh operational costDepends on the availability of specialized equipmentDepends on the availability of specialized personnelRisky operation



Natural sequence:



Design of a device that imitates a rainfall event:

SimpleCost effectiveDoes not require stopping of turbineDoes not require access to rotorDoes not require specific qualificationDoes not require direct contact with the blade Independent of wind farm operationMinimum maintenanceRobustReliable


BladeCleaning® - Operation

Water streams are projected against the wind; the cloud of water generated is ‘cut’ by the passing blade

Water impact, moisturising, degreasing and dragging effects produce:Decomposition of attached particles on the bladeAccumulated material detaches from the blade surfaceCentrifugal force pushes rests of insects to end of bladeMaterial leaves the blade at the tip



The cleaning process is performed while the turbine is in operation, this means:

The angle of impact between the blade and the water is the same as the angle between blade and flying insects

The efficiency of the cleaning is maximum on the leading edge of the blade. The leading edge:

Is the section of the blade more susceptible to soilPlays a key role in the efficiency of the turbine



The device is orientated against the dominant wind direction

The cleaning fluid is sprinkled (against the wind) at a given pressure

This generates a cloud of water + cleaning agent that is ‘cut’ by the passing blades

The whole surface of the blade is reached:Inner side of blade (direct flow)Leading edge (passing blade impacts with the flow)Outer side (returning flow – wind effect)



Wind

Rotor direction

Impact oninner side

Impact onleading edge

Impact onouter side

Water + cleaning agentcloud


BladeCleaning® - Patent

Patented system and utility model Registry of mark


SYSTEM OPERATIONBladeCleaning® System



Turbine always in operationCleaning performance: 2 WTG/h

FlexibilitySystem can be deployed on any turbine. Completely adaptable to the requirements of any wind farm.

Stall controlled turbinesPitch controlled turbines

ApplicationsDirt (in general)InsectsDustOilIce


BladeCleaning® - Results


BladeCleaning® - Application sequence

Dirt in blades detected(Loss on power curve)Dirt in blades detected(Loss on power curve)

Recovery of power curveRecovery of power curve

ApplicationBladeCleaning®

ApplicationBladeCleaning®

No stopping of turbineNo stopping of turbine


BladeCleaning® Services

1. Loss of production assessment

2. Installation of fixed BladeCleaning® devices on turbines

3. Performance of autonomous cleaning operations


Real production analysis

Comparison against theoretical production

Evaluation of loss of production

Economic analysis

BladeCleaning® Services Loss of production assessment


Stopping of turbine: 3 hours

Attachment device-tower: magnetic

Immediately operational

Adaptable to any make of turbine

No external power source needed

BladeCleaning® Services Installation


BladeCleaning® Services Cleaning operation


BladeCleaning® Services Cleaning operation – Dragging effect


BladeCleaning®

Customized design

Recurrent cleaning operationsAutonomousImmediate No stopping of turbine


BladeCleaning®

Service includes:Wind farm logbook maintenanceContinued improvement assessment


BladeCleaning®Economic analysis


BladeCleaning® - Economic analysisEvaluation of the observed power curve:

50 %Loss of production

50 %


BladeCleaning® - Economic analysis Calculation for a typical 1 MW wind farm

Nominal power: 1.000 kW Equivalent annual hours: 2.500 h Theoretical production: 2.500.000 kWh Selling price: 0,08 €/kWh Predicted revenue: 200.000 €/year

Double Stall consequences Average loss in power curve: 20 % Loss of production: 500.000 kWh Loss in revenue: 40.000 €/year

BladeCleaning® system may increase revenue up to40.000 €/year/MW


BladeCleaning®

[email protected](+34) 91.799.70.27

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