IQPC 3 rd International Conference Drivetrain Concepts for Wind Turbines 22-24 October 2012 Swissôtel Bremen, Germany Introduction of the Sway Turbine ST10 Eystein Borgen CTO Sway Turbine AS 1 Sway Turbine AS proprietary Reproduction without written permission strictly forbidden
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IQPC 3rd International Conference
Drivetrain Concepts for Wind Turbines
22-24 October 2012
Swissôtel Bremen, Germany
Introduction of the
Sway Turbine ST10
Eystein Borgen
CTO Sway Turbine AS
1
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
2
To be presented:
• Sway Turbine’s new large
diameter generator technology
with ironless stator core
• Generator and blade rotor
integration
• Weight and cost advantages
• Cost of energy prospects
compared to state of the art DD
turbines
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
Who are we?
– Sway AS founded in Norway 2000 (floating foundations for wind turbines)
– De-merged into two independent companies in 2010:
– Sway AS (development of floating foundations for wind turbines)
– Sway Turbine AS (10MW wind turbine development, for fixed and floating foundations)
– Sway Turbine AS is a technology company
– Commercialization of the technology with preferred industrial partner(s)
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
The challenge
• High Balance of Plant cost per unit related to:
– Installation
– In-field transmission (connection by submerged cable)
– Operation & Maintenance (O&M)
• Less units, i.e. larger turbines, may reduce the above costs
BUT: The cost per MW of the wind turbine itself increases by size (cube-square law)
• 10MW turbine development with ironless generator stator initiated by Sway Turbine in 2005 to overcome this challenge
• Approximately 70 engineers have been involved
• € 20 million spent on the development and design phase
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
Top Head Mass comparison
Mass conventional DD turbine (te)
Sway Turbine scaled to 5MW (te)
Comment
280 201/ 185*
*Blade supports in composite (-34%)
Mass conventional DD turbine (te) Sway Turbine ST10 (te)
Comment
770 625 Prototype mass (-19%)
570 Expected mass after optimalisation (-26%)
530 Blade supports in composite (-31%)
Top Head Mass of 5MW-115m diameter rotor
Top Head Mass of 10MW-164m diameter rotor
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
ST10 specification • Power regulation: Pitch regulated with variable speed
• Rated power: 10MW
• Cut-in wind speed: 4 m/s
• Cut-out wind speed 28 m/s
• Nominal rotor speed 12 rpm (tip speed 103m/s)
• Operational temperature range : -10- +30 deg C (North sea)
Reproduction without written permission strictly forbidden
Cost of Energy (CoE) input assumptions
• 490MW wind farm 40km from shore, 30m water depth (fixed) and 120m
water depth (floating).
• IRR of 10.9% on the total wind farm CAPEX
• Manufacturing costs are based on European costs levels
• 3 different generator to rotor area ratios; medium (480W/m2), medium to large (405W/m2) and large (331W/m2)
The Cost of Energy calculations includes: • Electrical grid connection to shore + onshore grid reinforcement • 33% additional costs of wind turbine due to offshore application (additional
corrosion protection, landing platforms, market factor, warranty risk etc) • 10% contingency on total farm Capex and 10% profit to the OEM.
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
CoE fixed foundations, 10m/s
11
12
13
14
15
16
17
18
0 5 10 15 20 25
Co
st o
f En
erg
y (€
cen
t/kW
h)
Turbine size (MW)
COE - Conventional DD PM turbines versus Sway Turbine (ST), both on fixed foundations, 10m/s site, 10.9%IRR, Foundation and installation calibrated with wind farm operator’s cost model.
Conventional Turbine DD PM Medium rotor diam. 480W/m2 on fixed foundation
Conventional Turbine DD PM Medium to large rotor diam. 405W/m2 on fixed foundation
Conventional Turbine DD PM Large rotor diam. 331W/m2 on fixed foundation
Sway Turbine (ST) Medium rotor diam 480w/m2 on fixed foundation
Sway Turbine (ST) Medium to large rotor diam. 405W/m2 on fixed foundation
Sway Turbine (ST) Large rotor diam. 331W/m2 on fixed foundation
ST10-164
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
CoE fixed foundations, 9m/s
12
13
14
15
16
17
18
19
20
0 5 10 15 20 25
Co
st o
f E
ne
rgy
(€
cen
t/k
Wh
)
Turbine size (MW)
COE - Conventional DD PM turbines versus Sway Turbine (ST), both on fixed foundations, 9m/s site, 10.9%IRR, Foundation and installation calibrated with wind farm operator’s cost model.
Conventional Turbine DD PM Medium rotor diam. 480W/m2 on fixed foundation
Conventional Turbine DD PM Medium to large rotor diam. 405W/m2 on fixed foundation
Conventional Turbine DD PM Large rotor diam. 331W/m2 on fixed foundation
Sway Turbine (ST) Medium rotor diam 480w/m2 on fixed foundation
Sway Turbine (ST) Medium to large rotor diam. 405W/m2 on fixed foundation
Sway Turbine (ST) Large rotor diam. 331W/m2 on fixed foundation
ST10-164
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
CoE floating, 10m/s
12
13
14
15
16
17
18
19
20
0 5 10 15 20 25
Co
st o
f En
erg
y (€
cen
t/kW
h)
Turbine size (MW)
COE - Conventional DD PM turbine versus Sway Turbine, both on Sway foundations, 10m/s site, 10.9%IRR
Conventional Turbine DD PM Medium rotor diam. 480W/m2- on Sway floating foundation
Conventional Turbine DD PM Medium to large rotor diam. 405W/m2- on Sway floating foundation
Conventional Turbine DD PM Large rotor diam. 331W/m2- on Sway floating foundation
Sway Turbine (ST) Medium rotor diam. 480W/m2- on Sway floating foundation
Sway Turbine (ST) Medium to large rotor diam. 405W/m2- on Sway floating foundation
Sway Turbine (ST) Large rotor diam. 331W/m2- on Sway floating foundation
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
Summary: (apple to apple 10MW-164m rotor diam.)
Generator -6% turbine cost
Blades -6% turbine cost
Main bearing -6% turbine cost
Misc. -4% turbine cost
Fewer units. Less balance of plant costs.
Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden
|
Thank you! Sway Turbine AS proprietary
Reproduction without written permission strictly forbidden