enviria.com bladecleaning® - limpieza de palas the solution to power loss bladecleaning ® ...
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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
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Double Stall – Aerodynamic failurePower losses up to 50 % from wind speeds over 10
m/s.
Normal power curve
Double Stall affected power curve
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Double Stall – CauseAccumulation of insects on the leading edge of the
blades
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Double Stall – Consequences
Expected consequences inwind farm management
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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)
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Double Stall – References
Double stall caused by insects is widely documented
enviria.com BladeCleaning® - Limpieza de palas
SOLUTION APPROACHBladeCleaning® System
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Double Stall – Solutions
Manual cleaning of the blades produces the recovery of the turbine’s power curve
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Double Stall – Solutions
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
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Double Stall – Solutions
Natural sequence:
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Double Stall – Solutions
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
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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
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BladeCleaning® - Operation
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
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BladeCleaning® - Operation
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)
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BladeCleaning® - Operation
Wind
Rotor direction
Impact oninner side
Impact onleading edge
Impact onouter side
Water + cleaning agentcloud
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BladeCleaning® - Patent
Patented system and utility model Registry of mark
enviria.com BladeCleaning® - Limpieza de palas
SYSTEM OPERATIONBladeCleaning® System
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BladeCleaning® - Operation
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
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BladeCleaning® - Results
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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
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BladeCleaning® Services
1. Loss of production assessment
2. Installation of fixed BladeCleaning® devices on turbines
3. Performance of autonomous cleaning operations
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Real production analysis
Comparison against theoretical production
Evaluation of loss of production
Economic analysis
BladeCleaning® Services Loss of production assessment
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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
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BladeCleaning® Services Cleaning operation
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BladeCleaning® Services Cleaning operation – Dragging effect
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BladeCleaning®
Customized design
Recurrent cleaning operationsAutonomousImmediate No stopping of turbine
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BladeCleaning®
Service includes:Wind farm logbook maintenanceContinued improvement assessment
enviria.com BladeCleaning® - Limpieza de palas
BladeCleaning®Economic analysis
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BladeCleaning® - Economic analysisEvaluation of the observed power curve:
50 %Loss of production
50 %
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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
enviria.com BladeCleaning® - Limpieza de palas
BladeCleaning®
[email protected](+34) 91.799.70.27
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