Wave Energy

1
Wave Energy

• Frances Bean

2
Wave Energy

• Estimated practicable amount of energy from waves
  from around the UK- 50TWh/year from offshore
  2.1TWh/year from near shore (lt20miles
  from the coast)
• thus 16 of UK energy demand
• Not yet achievable

3

• Many different devices and many problems.
• - Osprey
• - Stingray
• - Pelamis
• - Limpet

4
Pelamis

• Facts
• Produces 750kW per device
• Load factor 31
• Thus 232.5kW per device
• 2.03MWh annually per device
• Each device 120m by 3.5m in size
• Requires water depth 50-60m
• Require 50kW/m of energy from waves
• Require 120m between devices

5
Pelamis
Pelamis

• 40 devices in 1km2 produce 30MW but with a load
  factor of 31 only 9.3MW and so 81.375GWh
• Build 40 devices every 3 months -1km2 every month
• 160 devices built a year, 4km2 a year
• Could therefore have 3200 devices so 6496GWh if
  in the next 5 years the technology could be
  developed

6
Pelamis
Pelamis

• Restrictions on development
• Space available
• Cost
• Weather

7
Pelamis
Pelamis
Projections considering problems 2010 - 2 in use
- 4.06GWh 2015 - 10 in use - 20GWh 2020 - 40 in
use - 81.2GWh 2025 - 80 in use - 162.4GWh 2030 -
200 in use - 406GWh
8
Limpet

• Facts
• Produces 500kW
• per device
• Load factor 40
• Thus 200kW per device
• 1.75MWh annually per device

• Restrictions on development
• Location
• Manufacture
• COST
• WEATHER

9
Limpet

• Projections
• 2010 - 1 in use - 1.75GWh
• 2015 - 2 in use - 3.5GWh
• 2020 - 4 in use - 7GWh
• 2025 - 7 in use - 12.25GWh
• 2030 - 10 in use - 17.5GWh

10
TOTAL annually

• 2010 - 5.81GWh
• 2015 - 23.5GWh
• 2020 - 88.2GWh
• 2025 - 174.65GWh
• 2030 - 423.5GWh
• assuming only the two devices could be used when
  others may be developed by 2030