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Wave Power The Renewable Future for the UK Nicola Thomas 24 th February 2005.

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Presentation on theme: "Wave Power The Renewable Future for the UK Nicola Thomas 24 th February 2005."— Presentation transcript:

1 Wave Power The Renewable Future for the UK Nicola Thomas 24 th February 2005

2 Wave Power Waves are created by interaction with wind on the surface of the water. Waves are created by interaction with wind on the surface of the water. The wind blows across the Atlantic Ocean all the way from America. The wind blows across the Atlantic Ocean all the way from America. This large distance means the UK has one of the highest wave power levels in the world. This large distance means the UK has one of the highest wave power levels in the world.

3 European Wave Resource Chart The chart shows annual average wave power in kilowatts per metre of crest width for various European sites. (Ocean Power Delivery Limited, 2005) Wave Power - The Resource

4 Wave Power – The Potential There is sufficient energy breaking on the UK shoreline to power the country three times over. There is sufficient energy breaking on the UK shoreline to power the country three times over. However, it is not practical to recover all the energy. However, it is not practical to recover all the energy. The economically recoverable resource for the UK has been estimated to be 87 TWh/y -1. The economically recoverable resource for the UK has been estimated to be 87 TWh/y -1.

5 Wave Power – The Technology There are two major areas of wave power: Shore-line Shore-line Offshore Offshore The wave industry has many technologies striving for success, very few will, however, eventually achieve commercialisation.

6 Wave Power – The Devices The Limpet - Wavegen (Shoreline) The Limpet - Wavegen (Shoreline) The Pelamis - OPD (Offshore) The Pelamis - OPD (Offshore) There are two current potential commercial technologies. One is shoreline and the other is offshore.

7 Wave Power – The Technology Limpet has a generating capacity of 500 kW and currently powers 300 homes in Islay. Limpet has a generating capacity of 500 kW and currently powers 300 homes in Islay. Limpet uses the Oscillating Water Column Technology. This relies on the motion of the waves compressing and sucking air through a turbine which powers a generator. Limpet uses the Oscillating Water Column Technology. This relies on the motion of the waves compressing and sucking air through a turbine which powers a generator. Pelamis has a generating capacity of 750 kWPelamis has a generating capacity of 750 kW The Pelamis is a semi-submerged structure. Wave-induced motion of hinged joints is resisted by hydraulic rams. This pumps oil through hydraulic motors which drive electrical generators giving electricity.The Pelamis is a semi-submerged structure. Wave-induced motion of hinged joints is resisted by hydraulic rams. This pumps oil through hydraulic motors which drive electrical generators giving electricity.

8 Wave Power – The Predictions OFFSHORE The Pelamis will not be ready to go commercial for another 5 years from present. Due to this the prediction for offshore is 0 PJ

9 Wave Power – The Predictions OFFSHORE Due to scale of Pelamis I predict there will be a yearly build rate of 200 devices each taking 3 months to build. Due to scale of Pelamis I predict there will be a yearly build rate of 200 devices each taking 3 months to build. Load factor will be less than wind ~ 0.2 Load factor will be less than wind ~ 0.2 This is generation in 5 years:- This is generation in 5 years:- 200 x 750 = kW x 0.2 x 8736 = kWh x 5 = / 1000 = MWh/y-1 Or = 4.72 PJ

10 Wave Power – The Predictions OFFSHORE I predict that in 5 years from the initial phase of commercialisation the amount of energy generated will double due to and increase in the number of wave farms 2000 devices deployed = MWh/y -1 Or = 9.43 PJ

11 Wave Power – The Predictions OFFSHORE Again I believe that in 2025 and 2030 the industry will remain at a constant increase as although manufacture may improve the number of suitable locations may decrease due to adverse effects on shipping and other activities devices deployed x 3 = MWh/y -1 Or = PJ 4000 devices deployed x 4 = Or = PJ

12 Wave Power – The Predictions OFFSHORE The energy consumption for the UK is PJ per year. With Offshore Wave power producing PJ It would therefore be able to contribute 0.17% 0.17% of the UK's needs.

13 Wave Power – The Predictions SHORELINE These devices again are unlikely to be fully commercial until after 2010 The prediction is 0MW. The prediction is 0MW.

14 Wave Power – The Predictions SHORELINE The major constraint for this type of shore based technology is location. These devices can only be built into hard rock. The South and the East coastlines, excluding Cornwall, are therefore not ideal. Pembrokeshire and West Scotland are good locations. ~10% of coastline is probably optimal. This is equal to 1649 devices Scottish coastline length: 16,491 km Spacing of devices 1 device = 1 km Build scale of around 30 per year This would take up 30 km/y -1 A maximum number of devices is 16, devices every year for 20 years = 600 devices by 2030

15 Wave Power – The Predictions SHORELINE By 2030 the Onshore wave industry will be generating PJBy 2030 the Onshore wave industry will be generating PJ As discussed earlier the major limiting factor for this technology is space.As discussed earlier the major limiting factor for this technology is space. Large opposition would be created if it was proposed to put wave plants every 100 m along the coast.Large opposition would be created if it was proposed to put wave plants every 100 m along the coast. This wave plant also has a lower load factor than wind.This wave plant also has a lower load factor than wind. 600 x 500 =300000kW/1000 =300 MW 300 x 0.2 x 8736 = MWh/y PJ This works out at % of the UKs demand

16 Wave Power – The Predictions Together Together Offshore wave and onshore wave can produce PJ by This works out at 0.2% of the UKs energy demand

17 Wave Power - Major Restrictions Costs: Costs: Competition with lower cost technologies. Technology Technology Force of the sea (Osprey) Force of the sea (Osprey)Transmission Fewer potential sites Fewer potential sites Higher installation costs Higher installation costs Individual projects (economies of scale)

18 Wave Power The Renewable Future for the UK THE END


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