Worked Examples
| Armour Edge | Soft Shell | Tape | Coating | |
|---|---|---|---|---|
| Associated Costs ($) | ||||
| Initial Cost | $15,300 | $20,400 | $18,300 | $17,600 |
| Downtime Cost | $1,600 | $7,200 | $7,400 | $9,400 |
| Total Cost of Installation | $16,900 | $27,600 | $25,700 | $27,000 |
| Lifetime Cost | $121,506 | $152, 358 | $320,457 | $191,210 |
Initial Costs
Armour Edge
$15,300
Soft Shell
$20,400
Tape
$18,300
Coating
$17,600
Downtime Cost
Armour Edge
$1,600
Soft Shell
$7,200
Tape
$7,400
Coating
$9,400
Total Cost of Installation
Armour Edge
$16,900
Soft Shell
$27,600
Tape
$25,700
Coating
$27,000
Lifetime Cost
Armour Edge
$121,506
Soft Shell
$152, 358
Tape
$320,457
Coating
$191,210
Installation
Recent off-shore installations have achieved 8m repair per blade/day, averaging a WTG completed in 4 days versus 6 days for the competition for the same reasons as on-shore.
GAIN – 2MW ON-SHORE WTG
Armour Edge Repair – 3 Days
Competitor Repair – 6 Days
Generation Gain – 15MWh/WTG
TOTAL ON-SHORE GAIN – 706MWh/WTG
GAIN – 3.6MW OFF-SHORE WTG
Armour Edge Repair – 4 Days
Competitor Repair – 6 Days
Generation Gain – 23MWh/WTG
TOTAL OFF-SHORE GAIN – 1682MWh/WTG
On an average 50WTG European windfarm with an electricity price of £75/MWh the gain would be £2.65m onshore and £6.31m offshore
ASSUMPTIONS (PER WTG)
1. AEP gain based on cf of 30% onshore and 40% offshore
Durability
If we assume Armour Edge to last at least 15 years compared to the observed failure of other LEP solutions well within this time frame, we anticipate at least one less repeat LEP repair, conferring significant savings in materials, technicians, access and downtime.
GAIN – 2MW ON-SHORE WTG
One additional competitor repair over 15 years – 6 days
Additional cost of materials, technicians and access
Generation Gain – 15MWh/WTG
TOTAL ON-SHORE GAIN – 706MWh/WTG
GAIN – 3.6MW OFF-SHORE WTG
One additional competitor repair over 15 years – 6 days
Additional cost of materials, technicians and CTV
Generation Gain – 69MWh/WTG
TOTAL OFF-SHORE GAIN – 1682MWh/WTG
On an average 50WTG European windfarm with an electricity price of £75/MWh the gain would be £2.65m onshore and £6.31m offshore
ASSUMPTIONS (PER WTG)
1. Using competitor LEP requires one additional repair
2. Assume 15 year life for Armour Edge (compares to the OREC independently generated lifetime prediction of 53.4 years) versus 7.5 years for competitor
Aerodynamics
GAIN – 2MW ON-SHORE WTG
Improvement in AEP 44MWh/WTG
15 Year Generation Gain – 662MWh/WTG
TOTAL ON-SHORE GAIN – 706MWh/WTG
GAIN – 3.6MW OFF-SHORE WTG
Improvement in AEP 106MWh/WTG
15 Year Generation Gain – 1590MWh/WTG
TOTAL OFF-SHORE GAIN – 1682MWh/WTG
On an average 50WTG European windfarm with an electricity price of £75/MWh the gain would be £2.65m onshore and £6.31m offshore
ASSUMPTIONS (PER WTG)
1. Onshore AEP uplift based on offshore data with a 30% cf
2. 0.84% AEP improvement obtained from 2 years’ of offshore operational data
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