Wave Energy
Frances Bean
24th February 2005
Wave Energy
• Estimated practicable amount of energy
from waves from around the UK50TWh/year from offshore
2.1TWh/year from near shore
(<20miles from the coast)
thus ~16% of UK energy demand
• Not yet achievable
• Many different devices and many
problems.
-
Osprey
Stingray
Pelamis
Limpet
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
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
Pelamis
Restrictions on development
• Space available
• Cost
• Weather
Pelamis
Projections considering problems
2010
2015
2020
2025
2030
-
2 in use - 4.06GWh
10 in use - 20GWh
40 in use - 81.2GWh
80 in use - 162.4GWh
200 in use - 406GWh
Limpet
Facts
Restrictions on development
• Produces 500kW
•Location
•Manufacture
•COST
•WEATHER
•
•
•
per device
Load factor ~40%
Thus 200kW per
device
1.75MWh annually
per device
Limpet
Projections
2010
2015
2020
2025
2030
-
1 in use - 1.75GWh
2 in use - 3.5GWh
4 in use - 7GWh
7 in use - 12.25GWh
10 in use - 17.5GWh
TOTAL annually
2010
2015
2020
2025
2030
-
5.81GWh
23.5GWh
88.2GWh
174.65GWh
423.5GWh
assuming only the two devices could be used
when others may be developed by 2030