A NAKED TURBINE FOR HARSH ENVIRONMENTS
©3E |
2011 Wind Diesel Workshop
©3E |
2010
CONTENTS
Background
Design drivers
Technology
Status
Conclusions
©3E | 2011
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3E
- Renewable Energy & Energy Efficiency Consultancy
- Based in Brussels, Belgium
- Presence in China, Turkey, South-Africa and France
- Services in Wind
- Site screening, feasibility, resource assessments and data analysis
- Design & technical advisory
- Due diligence
- Monitoring & continuous performance optimization
- Targeted services for project developers, investors, lenders
- www.3E.eu
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3E ACTIVITIES IN HYBRID POWER SYSTEMS
- Focusing on feasibility studies, system dimensioning and system integration
- Projects in Vietnam, Mali, Cambodia, Antarctica, Haiti, Cape Verde…
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3E HYBRID POWER PROJECTS
Timbuktu, Mali
System characteristics
- Village community
- Retrofit wind-diesel system
- Electricity tariff 15 ¢€/kWh
- Utility unwilling to expand
3E tasks
- Wind resource assessment
- Technical-economic feasibility
- Technical project plan
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3E HYBRID POWER PROJECTS
Sihanoukville, Cambodia
System characteristics
- Main harbour in the country
- Retrofit wind-diesel system
- Low-wind speeds
3E tasks
- Wind resource assessment
- Selection of system configuration
- Tendering procedure
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3E HYBRID POWER PROJECTS
Polar Station, Antarctica
System characteristics
- Stand-alone research base
- PV-wind-diesel system
- 100% renewable
3E tasks
- System design
- Component selection
- Detailed engineering
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TURBINES ON REMOTE LOCATIONS
Issues 3E has come across as hybrid-power system integrator
1. Overall investment cost is still too high
- Custom engineering adding on to the total cost
- Complex BOP components further increase cost
- Foundations in uncooperative soils can drive the cost up
- Transport & installation often overlooked and exorbitant
2. Reliability still an issue
- Wind turbines do need maintenance
- Lack of ownership, especially in less developed regions
3. Yield at low-windspeed sites could be better
- Turbines are installed close to load centres
- We need low-windspeed rotors that can cope with extreme conditions
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DESIGN FOR REMOTE LOCATIONS
Design criteria throughout the development process
INCREASED
ROBUSTNESS
PRE-ENGINEER
& PRE-PACKAGE
OPTIMISED
LOGISTICS
LOWWINDSPEED
AERODYNAMICS
LOWER INVESTMENT COST
LOWER OPERATIONAL COST
HIGHER YIELD
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A RADICALLY NEW TURBINE
XANT: Xtremely Austere, Nimble yet Tough
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ELIMINATING THE DRIVE TRAIN INCREASES
ROBUSTNESS
XANT Drive Train
Direct-drive generator
Permanent magnet rotor
One set of bearings
One single rotating component
Modular stator
Benefits
Lower parts count
No need for alignment
Easy repair & replacement
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SIMPLIFY CONTROL & ELECTRONICS
XANT Control
Eliminated active servo systems
Reduction of number of sensors
Electronics in controlled environment
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Benefits
Reliability through fewer connections
Less Maintenance
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INCLUDE BOP IN SCOPE OF SUPPLY
XANT integrated BOP
Integrated dump-load & storage
One single interface
Benefits
Smooth grid-side output
No need for custom-engineering
Less commissioning errors
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XANT HALVES COST OF TRANSPORT
XANT Logistics
Transport in 40-foot container
Limited component weights
Benefits
Avoided heavy equipment during
installation
Suitable for complex terrain and
remote sites
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OFF-THE-SHELF COMPONENTS & STANDARD
MANUFACTURING FOR GLOBAL SOURCING
XANT components
Standard tubes for structural components
Standard blade manufacturing techniques
Off-the-shelf bearings and yaw-drive components
Innovative but not exotic
Benefits
Capex reduction by global sourcing
Supply chain control by multiple supplier strategy
• glass-fibre reinforced
plastics & epoxy resin
• dry lay-up & resininfusion moulding
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• NdFeB Magnets
• M330-50A stator core
• off-the-shelf bearings
• S355 J2 steel
• EN 10 210 steel tubes
• EN 15 614 welding
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AVOID USE OF EXPENSIVE CRANES
XANT Tower
Tilt-up guyed tower
On-site assembly
Erection without crane
Benefits
No crane needed for installation and maintenance
Lightweight and Low cost
Smaller foundations
Lower tower shadow and noise
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SWEPT PLANFORM BLADES REDUCE LOADS
WHILE STABILISING YAW MOTION
XANT Rotor
Swept-planform blades
Standard manufacturing technique
Benefits
Load reduction
Noise reduction
Stable yaw behaviour
Innovative “looks”
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XANT-21 Power Curve
High up in 7-11m/s range
Drop off above 20m/s
Benefits
Increased energy capture
Electrical Power (kWe)
A POWER CURVE THAT PEAKS
WHERE IT MATTERS
100
80
60
40
20
0
Annual Energy Yield (MWh)
3
8
13
18
Wind Speed (m/s)
23
60
50
40
30
20
10
0
3
5
7
9
11
13
15
17
19
21
23
25
Wind Speed (m/s)
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DEVELOPMENT CYCLE & STATUS XANT-21
2008
Design
2009
Certification
• Conceptual Design
• Preliminary Design
• Final Design
• Development Accompanying Assessment
• GL Design Assessment
2010
2011
2012
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Prototype
Testing
• Component prototyping
• Full-scale prototyping
• Type Certification
• Field tests
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CONCLUSIONS

Bring the project cost down
 by reducing the cost of engineering: “a few sizes fits all”
 by reducing the cost of transport & installation
 by reducing the cost of BOP components

Expand the market beyond these niche markets of industrialised
regions with high COE to the developing world

We need very reliable turbines that require minimal maintenance

We need turbines optimised for low wind-speed sites that can cope
with extreme conditions
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CONTACT DETAILS
Werner Coppye
Alex De Broe
3E
3E
Vaartstraat 61
Vaartstraat 61
1000 Brussels
1000 Brussels
Werner.Coppye@3e.eu
Alex.DeBroe@3e.eu
+32 476 55 28 10
+32 485 57 92 32
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