1. Frances Bean 24th February 2005
Wave Energy
Frances Bean
24th February 2005

2. Wave Energy
Estimated practicable amount of energy from waves from around the UK TWh/year from offshore TWh/year from near shore (<20miles from the coast)
thus ~16% of UK energy demand
Not yet achievable
15.8%

3. Many different devices and many problems. - Osprey - Stingray
- Pelamis
- Limpet
Osprey- sunk
Stingray-still very much experimental
Pelamis- one made but currently not in use due to weather conditions
Limpet- one

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 GWh
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
Space required for manufacture, need 40 locations
Space for devices 80km

6. Pelamis Pelamis Restrictions on development Space available Cost
Weather

7. Pelamis Pelamis Projections considering problems
in use GWh
in use - 20GWh
in use GWh
in use GWh
in use - 406GWh

8. Limpet Facts Produces 500kW Restrictions on development 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

10. TOTAL annually 2010 - 5.81GWh 2015 - 23.5GWh 2020 - 88.2GWh
assuming only the two devices could be used when others may be developed by 2030
Others could be developed but unlikely