- The document discusses a new offshore wind turbine design called the SCD 8.0 MW nezzy concept that aims to reduce levelized cost of energy (LCoE) through lower capital and operating expenditures. - Key aspects of the design include a two-bladed downwind floating turbine supported by guyed towers, which eliminates the need for an expensive yaw system. It also allows for easier installation and maintenance using lighter components. - Analysis shows the SCD 8.0 MW nezzy concept could achieve a 1.4 euro cent per kWh operations and maintenance cost, over 20% lower than current offshore wind farms, through reduced downtime, remote monitoring, and extended maintenance intervals of 5 years. This helps

1. Jan-Christoph HINRICHS
Research Engineer / Load Calculation
Aerodyn engineering gmbh

2. Reducing CAPEX
and OPEX with
SCD nezzy 8.0 MW
Jan-Christoph Hinrichs,
aerodyn engineering gmbh, Büdelsdorf, Germany

3. Company background
• Independent, private owned
engineering company since 1983
• Overall turbine design from
blade tip to foundation
• 27 designs, 32 000 turbines
and 12.5 % market share
• 4 types of OWT in 5 - 6 MW class
since 2000

4. Motivation: Current LCoE situation offshore
Turbine
3,0
Foundation
2,6
Cable
0,2Transformer
0,6
Installation
1,7
Building
Permit
1,0
Reserve
1,4
Maintenance
& Repair
3.2
Dismanteling
0,4
14.2 €cent / kWh
~ 22.5 % OPEX!
Acceptable:
10 €cent / kWh
Reachable with nezzy:
8.5 €cent / kWh
Source: Fichtner – Cost Reduction Potential Offshore Wind Power

5. How to reduce LCoE?
• Increase of AEP
• Decrease of CapEx
• Extension of lifetime
• Decrease of financing costs
• Decrease of OpEx
Remember: Small improvements will have a small effect on LCoE !!!

6. SCD 8.0 MW nezzy concept
• Floating wind turbine
• Two-bladed rotor
• Downwind design
• No yaw system
• Guyed tower structure
• Reduced drag tower shape
• Concrete foundation
• Light weight drive train
• Less installation and
dismantling effort
• Smaller footprint
• 35 m water depths

7. Impact on OPEX
• Less turbine parts -> less probability of failure
• Keep redundancy
• Advanced condition monitoring
• Remote service control
• Proactive maintenance
• Proactive part exchange
• 5 year maintenance interval as result
• Easy system exchange
• Asset sharing
• Above 50 km distance to shore sea-based
maintenance station reasonable
Result for SCD 8.0 MW nezzy: 1.4 €cent/kWh O&M cost

8. Reducing cost
with SCD 8.0 MW nezzy :
• light weight SCD-Technology
• use of 2 blade downwind rotor
• using advantage floating technology
• avoiding expensive vessels
• minimizing dismantling expenses
by 40 %

9. Thank you for your attention!
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