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A Tucker, J M Pemberton, D T Swift-Hook and J M Swift-Hook, AquaBase Construction Ltd /Trafalgar Marine, UK J W Phillips, Embley Energy Ltd, UK 5.0.

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Presentation on theme: "A Tucker, J M Pemberton, D T Swift-Hook and J M Swift-Hook, AquaBase Construction Ltd /Trafalgar Marine, UK J W Phillips, Embley Energy Ltd, UK 5.0."— Presentation transcript:

1 A Tucker, J M Pemberton, D T Swift-Hook and J M Swift-Hook, AquaBase Construction Ltd /Trafalgar Marine, UK J W Phillips, Embley Energy Ltd, UK 5.0

2 What is SPERBOY TM ? An oscillating water column wave energy converter Embley Energy Ltd – Marine Energy Challenge Building on the outcome from the MEC (c) 2010 Aquabase Construction & Embley Energy2

3 The SPERBOY TM Project Sponsored by the Carbon Trust and nPower Juice Fund OVERALL AIM: To investigate the advantages of using concrete for the SPERBOY TM structure An outline design for manufacture of the vessel using laminated concrete technology Test results on panels of concrete confirming its suitability Performance and cost predictions leading to a cost of generation (c) 2010 Aquabase Construction & Embley Energy3

4 Conventional concrete (c) 2010 Aquabase Construction & Embley Energy4 18mm plywood board

5 Laminated Concrete (c) 2010 Aquabase Construction & Embley Energy5 9mm plywood board

6 Depth of cover Conventional reinforced concrete mm Standard reinforced concrete in a marine environment mm Laminated ferro-cement 2-3 mm (c) 2010 Aquabase Construction & Embley Energy6

7 Brief history of reinforced concrete in a marine environment The oldest known ferrocement watercraft: (c) 2010 Aquabase Construction & Embley Energy7 A dinghy built by Joseph-Louis Lambot in Southern France in 1848.

8 1860s – ferro-cement canal barges built in Europe 1890's – Carlo Gabellini Barges and small ships out of concrete Elaborate lamination of rod netting, wire mesh, and trowelled mortar The most famous of his ships was the Liguria (c) 2010 Aquabase Construction & Embley Energy8

9 1908 – 1914: Larger ferrocement barges in Germany, UK, Holland, Norway, & California The remains of the Violette (1919), can be seen at Hoo Marina, Chatham, Kent. April 12, 1918: US President Woodrow Wilson approved construction of 24 ferrocement ships for war Only 12 under construction by November 1918 None completed by the end of the war Eventually completed and sold to private companies (c) 2010 Aquabase Construction & Embley Energy9

10 Maunsell Sea Forts (c) 2010 Aquabase Construction & Embley Energy10 Thames estuary air defences built Guy Maunsell Picture: 2009

11 Mulberry harbours: Phoenix Caissons Portland, (c) 2010 Aquabase Construction & Embley Energy

12 Powell River breakwater, British Columbia 12 (c) 2010 Aquabase Construction & Embley Energy Ten of the concrete ships built during WW I & II are known to still be afloat, forming a massive floating breakwater on the Malaspina Strait in the city of Powell River in British Columbia, Canada. Constructed to protect the logging pond of the Powell River Company pulp and paper mill.

13 Troll A Platform (c) 2010 Aquabase Construction & Embley Energy13 Built ,00 tonnes 472m high 303m below sea level 169m above Deployed 1996

14 Chutzpah – floating home (c) 2010 Aquabase Construction & Embley Energy14

15 (c) 2010 Aquabase Construction & Embley Energy15

16 Ardeola – floating boathouse (c) 2010 Aquabase Construction & Embley Energy16 U-shaped concrete pontoon supporting boat- house with accommodation above.

17 SPERBOY TM Design (c) 2010 Aquabase Construction & Embley Energy Vessel/structure: overall height 62m 40m draught 14,363 tonnes displacement 22m above the waterline Column diameter – inner 22m, outer 27m Collar diameter – 40m Water pressure both inside and outside water column only outside of hollow buoyancy collar 17

18 SPERBOY TM Construction (c) 2010 Aquabase Construction & Embley Energy Depth of structure creates construction problems Not strong enough to support itself out of the water Land factory-based construction not practical Problems of stability when under tow for deployment Limits possible marine construction sites 18

19 Proposed solution (c) 2010 Aquabase Construction & Embley Energy Artificial Island Annular. Laminated concrete pontoons. Capable of supporting final manufacturing process. Must be in two or more sections which can be parted to allow finished vessel to be removed. Floating roads connecting to shore. Must support crawler cranes/other mobile machinery/site facilities (canteen, WC, showers). 19

20 SPERBOY TM Construction (c) 2010 Aquabase Construction & Embley Energy Associated infrastructure 24-hour production Concrete batching plant Either on artificial island or close to shore Steel fabrication sub-assemblies Concrete pre-casting works Heavy handling equipment (forklifts, cranes) 20

21 Marine Construction Sites (c) 2010 Aquabase Construction & Embley Energy Loch Kishorn, Scotland - built 600,000 tonne Ninian Central in Dry dock + Good wharves on shoreline + Water depth of up to 50m to south of site - Remote - Poor road access 21

22 Marine Construction Sites (c) 2010 Aquabase Construction & Embley Energy Hunterston, Scotland - in the shadow of Hunterston B nuclear power station + Excellent road access + 65m long wharf at north corner + Water depth of 35-40m to west of site + Sheltered by islands west & north - Open to the south - Might be constrained by shipping lane 22

23 SPERBOY TM Costs Overall 7,500 tonnes To build 1 in 12 months: 35 tonnes/day Dry batching Machinery Work teams Higher production rates (c) 2010 Aquabase Construction & Embley Energy23

24 Price volatility makes costing almost impossible (c) 2010 Aquabase Construction & Embley Energy Oil Steel Cement Sand Water Labour Plant Machinery 24 (c) 2010 Aquabase Construction & Embley Energy

25 25 (c) 2010 Aquabase Construction & Embley Energy Oil price Steel price

26 Provide a sensitivity chart (c) 2010 Aquabase Construction & Embley Energy26

27 SPERBOY TM cost of energy Cost of SPERBOY TM - as above, but must also consider Maintenance Life of structure Decommissioning Amount of energy - i.e. PERFORMANCE (c) 2010 Aquabase Construction & Embley Energy27

28 SPERBOY TM wave tank trials Hydraulics and Maritime Research Centre (HMRC), University College Cork (c) 2010 Aquabase Construction & Embley Energy28

29 60m Column, 5m wave, 16s period, no Power Take-Off 60m Column, 5m wave, 13.3s period, Optimum PTO damping 60m Column, 5m wave, 11.4s period, no Power Take-Off 45m Column, Hs = 5m, Tp = 12.7s SPERBOY TM wave tank trials 1 (c) 2010 Aquabase Construction & Embley Energy29

30 60m Column. Storm 3 Hs = 11m,Tp = 13s SPERBOY TM wave tank trials 2 (c) 2010 Aquabase Construction & Embley Energy30

31 Wave Input Spectrum Wave energy matrix for Benbecula (in kW) Annual mean wave power – 62 kW/(m of wave front) (c) 2010 Aquabase Construction & Embley Energy31

32 SPERBOY TM performance Before Power Take-Off (PTO) losses (kW) (c) 2010 Aquabase Construction & Embley Energy32

33 SPERBOY TM energy capture Device Performance plus energy availability 700 kW Mean Annual Energy Capture, before PTO Losses (c) 2010 Aquabase Construction & Embley Energy33

34 SPERBOY TM The leading dimensions of the enlarged device: Overall diameter - 40 m Column internal diameter - 22 m Column length (below waterline) - 70 m Overall Mass, including ballast - 17,200 tonnes Performance curve (RAO) for 70 m col SPERBOY TM, 1 m wave amplitude "Annual Average" Wave Input Spectrum at Benbecula (c) 2010 Aquabase Construction & Embley Energy34

35 A 50-device farm will provide the energy used by 42,000 homes 4.7 MW/h per year per home) SPERBOY TM (c) 2010 Aquabase Construction & Embley Energy35

36 Summary & Conclusions (c) 2010 Aquabase Construction & Embley Energy Advantages of laminated reinforced concrete Long-established experience and recent developments Use for main structure of SPERBOY Methods of construction, locations, and issues faced Cost estimates First unit – will cost £4.2m to build in 12 months Series production at 1 per year - £2.2m each Quantity production - £1.3m each Reductions in commodity and labour costs Design improvements could bring costs down further 36

37 Next steps (c) 2010 Aquabase Construction & Embley Energy The future of wave power The future of SPERBOY Re-financed/expanded team Possible industrial/commercial partners 37

38 Questions? Prof Donald T Swift-Hook Aquabase Construction Ltd/Trafalgar Marine Mr John W Phillips Embley Energy Ltd (c) 2010 Aquabase Construction & Embley Energy38


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