Aoil Tidal energy ppt
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This presentation discusses tidal power and Abhay Ocean's work in the area. It begins with an introduction to Abhay Ocean and its experience in offshore construction. It then covers topics like the advantages of tidal power, potential tidal power sites in India like the Gulf of Kutch, the technology of tidal turbines, environmental impacts, and India's potential for tidal power development. The presentation provides an overview of tidal power technologies and Abhay Ocean's vision to help India utilize its tidal energy resources.
Aoil Tidal energy ppt
- 1. Presentation by AbhayPresentation by AbhayPresentation by AbhayPresentation by Abhay OceanOceanOceanOcean A Green InitiativeA Green InitiativeA Green InitiativeA Green Initiative 7/13/2015 1
- 2. About Abhay OceanAbout Abhay OceanAbout Abhay OceanAbout Abhay Ocean Marine/ Offshore Construction provider. Promoted by Captain Jagdish Khokhar, Ex. Naval Officer. A Qualified Fighter Pilot & Diver. Master Mariner Experience of over 30 years in managing & executing wide variety of offshore projects.projects. With our high degree of flexibility based on multi skilling industry knowledge and experience, with cost efficiency awareness. AOIL personnel and services are highly awareness, AOIL personnel and services are highly regarded throughout the Oil & Gas industry. 7/13/2015 2
- 3. marine renewablemarine renewablemarine renewablemarine renewable a sustainable futurea sustainable futurea sustainable futurea sustainable future Energy security: Reduce dependence on high crude oil, burden on treasury. Create expert knowledge base and Pool of talent in Marine renewable in India. Tap & generate most exciting form ofTap & generate most exciting form of Energy by utilizing highly innovative products. To develop technology to reduce carbon emission- Save world from Global warming. Study, conduct Surveys for future sites for offshore renewable. 7/13/2015 3
- 4. Why use marine current?Why use marine current?Why use marine current?Why use marine current? 7/13/2015 4 1. Predictability : Driven by Gravity not Weather. 2. High Energy Intensity= Low Cost. 3. Minimum Environment Impact,
- 5. Over view of ocean energyOver view of ocean energyOver view of ocean energyOver view of ocean energy Ocean energy is replenished by the sun and through tidal influences of the moon and sun gravitational forces. Near-surface winds induce wave action and cause wind-blown currents at about 3% of the windcurrents at about 3% of the wind speed. Tides cause strong currents into and out of coastal basins and rivers. Ocean surface heating by some 70% of the incoming sunlight adds to the surface water thermal energy, causing expansion and flow. 7/13/2015 5
- 6. High Potential Areas for Tidal resources in the World 7/13/2015 6
- 7. High Potential Areas for Tidal resources in the World 7/13/2015 7
- 8. The world’s largest tidal energy project will be built in Scotland between two islands. The island of Jura and the island of Islay. The project will have 10 tidal turbines and will be capable of producing 1MW of electricity. The SeaGen, tidal energy plant in Ireland, Operational Tidal Power plants 7/13/2015 8 The SeaGen, tidal energy plant in Ireland, is the first commercial tidal project which has reached the 5 GWh electricity generation mark.
- 9. FORCE, NOVA SCOTIA, CANADA 7/13/2015 9 The Fundy Ocean Research Centre for Energy (FORCE) in Nova Scotia is Canada’s leading test centre for tidal current technology. Nova Scotia is blessed with an abundance of natural tidal power resource in the Bay of Fundy.
- 11. Electricity demand is growing @ 8 % annually. Indian Power sector - Opportunity annually. About 54% energy comes from burning Coal/Lignite major reason of pollution. Capacity addition of about 120,000 MW is required for next 10 years. Challenge is to meet energy demand in sustainable manner. The need of hour is clean resource of Energy, in which offshore wind can play a major role7/13/2015 11
- 12. Indian Power sector at a glance 7/13/2015 12
- 13. Potential Tidal Power plant SitePotential Tidal Power plant SitePotential Tidal Power plant SitePotential Tidal Power plant Site MundraMundraMundraMundra portportportport 7/13/2015 13 The primary development site is located towards the centre of the mouth of the Gulf of Kutch, fewer than 17km to the south of Mandvi Beach, which is adjacent to the proposed onshore site at Maska.
- 14. Potential Tidal Power plant SitePotential Tidal Power plant SitePotential Tidal Power plant SitePotential Tidal Power plant Site 7/13/2015 14 The Ranwara Shoals, to the north of the site, create a shallow region through which flow is accelerated, resulting in ideal deployment conditions for the tidal turbines. The site experiences less extreme flows than, for example, the Pentland Firth and the Bay of Fundy.
- 15. Millions of gallons of water flow onto shore during tidal flows and away from shore during ebb & surge tide periods. The larger the tidal influence, the greater the displacement of water and therefore the more potential, Kinetic energy that can be harvested during power generation. Typical Working : Tidal Current Power Tides cause strong currents into and out of coastal basins and rivers. 7/13/2015 15
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- 17. Tidal energyTidal energyTidal energyTidal energy –––– advantagesadvantagesadvantagesadvantages No pollution Renewable resource, No Recurring fuel cost. More efficient than wind because of theMore efficient than wind because of the density of water(892 times than air) Predictable source of energy vs. wind and solar Does not affect Marine Life. Less Gestation period. Does not affect silt deposits Less costly – both in building and maintenance 7/13/2015 17
- 18. Tide Time table 7/13/2015 18
- 19. Tidal Stream Generators The world’s only operational commercial-scale tidal turbine, SeaGen,commercial-scale tidal turbine, SeaGen, was installed in Stranford Narrows in Northern Ireland in 2008. The prototype SeaGen turbine produces 1.2MW with currents of 2.4m/s or more. The capacity factor exceeds 60%. The facility is an accredited UK power station, and can contribute up to 6,000MWh annually to the UK grid, the equivalent of approximately 1500 homes.7/13/2015 19
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- 28. Second Generation of Tidal Turbines 7/13/2015 28
- 29. Marine Current Turbines (MCT), probably the most advanced of the current developers, offer 1MW horizontal shaft axial flow turbine units under the names Seagen and Sea Array. The turbine units, mounted in pairs on a monopile, use variable pitch blades with a sufficient range of pitch change to operate in both tidal flow directions. The structure includes a mechanism to raise the turbines to the surface for maintenance purposes. Second Generation of Tidal Turbines 7/13/2015 29 surface for maintenance purposes. SMD Hydrovision has a horizontal shaft 2 bladed fixed pitch turbine with 18 m diameter rotors device called TidEL, which comprises two 500 kW turbines mounted on a frame designed to float clear of the seabed and to move in such a way as to follow the tidal flow.
- 30. Tidal Generation Ltd is developing a 1 MW horizontal shaft three blade fixed pitch turbine. A 1MW prototype unit is due to be installed at the European Marine Energy Centre in Orkney in 2006. Commercial units are planned by 2010. Each turbine unit is mounted on the frame attached to the seabed. The frame is a lightweight structural design for easy installation and removal and is designed to follow the tidal flow. Second Generation of Tidal Turbines 7/13/2015 30 Tidal Hydraulic Generators Ltd are developing a horizontal shaft axial flow turbine of between 250 kW and 1 MW depending on stream velocity for an array of five 6mdiameter rotors. A prototype unit is planned for 2007 to be followed by a 10 MW farm by 2009. The turbine units are mounted on a frame attached the seabed that can be installed or lifted within a day. No information is available on whether the blades are fixed or variable pitch to facilitate bi-directional flow.
- 31. Third Generation of Tidal Turbines 7/13/2015 31
- 32. COMMERTIAL VIABILITY OF A SIMPLECOMMERTIAL VIABILITY OF A SIMPLECOMMERTIAL VIABILITY OF A SIMPLECOMMERTIAL VIABILITY OF A SIMPLE TIDAL STREAM ENERGYTIDAL STREAM ENERGYTIDAL STREAM ENERGYTIDAL STREAM ENERGY ----A STUDY BY DTIA STUDY BY DTIA STUDY BY DTIA STUDY BY DTI This tidal stream energy project has compared the overall Economics of two horizontal axis tidal turbine devices: a fixed pitch, bi-directional, variable speed turbine generator device with a variable pitch, variable speed turbine generator device that rotates to face into the tidal flow. The project has established, theoretically, the extent to which the loss in energy conversion 7/13/2015 32 extent to which the loss in energy conversion efficiency of the simpler to construct fixed pitch device is counter balanced by a reduction in capital and O&M costs and whether the system is technically feasible and sufficiently economic to warrant further development. The conclusion is that the simple fixed pitch, bi-directional device is competitive on a life cycle cost basis and worthy of further consideration.
- 33. Introduction: A variety of approaches is being taken to the harnessing of tidal stream energy to produce electrical energy for supply to the grid. The hydrodynamic performance of the sub-sea device will only be one parameter in the lifetime cost of each system. The marine environment is particularly aggressive towards equipment operating within it for extended periods, with limited COMMERTIAL VIABILITY OF A SIMPLECOMMERTIAL VIABILITY OF A SIMPLECOMMERTIAL VIABILITY OF A SIMPLECOMMERTIAL VIABILITY OF A SIMPLE TIDAL STREAM ENERGYTIDAL STREAM ENERGYTIDAL STREAM ENERGYTIDAL STREAM ENERGY ----A STUDY BY DTIA STUDY BY DTIA STUDY BY DTIA STUDY BY DTI 7/13/2015 33 within it for extended periods, with limited access or opportunity for routine inspection and maintenance. The O&M element of the lifetime cost of a tidal stream concept may well be greater than the already significant contribution of O&M costs to the cost per MWh anticipated for offshore wind energy and be a major determinant in the longer term whole life commercial viability of tidal stream energy. The agreed project scope was limited to horizontal
- 34. FEATURE EFFECTS/ IMPLICATIONS OF FEATURE ON OFFSHORE WIND TURBINE TIDAL CURRENT TURBINE FLUID DENSITY ~1.25 kg/m3 ~1025kg/m3 Max. velocity during operation ~25 m/s ~2-10 m/s Velocity for rated output ~ 12 m/s ~2-10 m/s Max. Velocity ~50 m/s As for normal Table 1: Offshore wind turbine vs Tidal current turbine 7/13/2015 34 Max. Velocity during operation ~50 m/s As for normal operation Variation of velocity with time Stochastic, variable in magnitude and direction over timescales of the order of seconds to years. Variation in magnitude and direction is predictable for years Rotor Diameter (typical) Output 90-120 m 5-10 Mw 15-20 m 2-5 Mw Erosion Not serious problem Serious problem
- 35. Environmental and other impactsEnvironmental and other impactsEnvironmental and other impactsEnvironmental and other impacts Unlike a wind turbine, the tidal stream turbine, being submerged, will have neither a direct visual effect nor a noise effect on human beings in normal conditions. There are, however, a number of areas in which submerged devices could have potentially significant environmental impacts or raise safety considerations for other maritime users and activities. Such areas include: ecology, pollution, 7/13/2015 35 Such areas include: ecology, pollution, coastal processes and interference with the tidal flow, noise and navigation safety considerations. Such issues will need to be taken into account in selecting a location for an individual tidal stream turbine or an array of turbines, and are likely to have cost and time implications.
- 36. PERFORMANCE The performance of devices that use the kinetic energy associated with a current or wind the performance is that of a low-head (wind or tidal) turbine. In this case the available power P for a given device Capture area A and associated wind/current velocity V is The gravitational attractions of the moon and sun, as the earth rotates, generate local tidal currents converting potential into kinetic energy. The magnitude of the local tidal range is 7/13/2015 36 The magnitude of the local tidal range is influenced strongly by the local seabed bathymetry and shoreline orientation. The local behaviour of tides is controlled by dominant semi–diurnal (period 12hrs and 25 mins) and diurnal periods and with monthly variations in maximum and minimum range (spring and neap tides). Predicting the time of local high and low tides and to a lesser extent their magnitude has occurred for many centuries. It is this predictability that makes the use of tidal energy attractive.
- 38. PRESSURE MAP:A simpler beam theory approach was used to find the appropriate span wise t/c variation. It is worth noting that the design loading case is driven by the maximum spring tide (rather than extreme events as required for wind turbines). Hydrodynamic loads (primarily in the f low direction) rather than centripetal loads dominate in the radial direction. 7/13/2015 38
- 39. ENERGY CAPTUREENERGY CAPTUREENERGY CAPTUREENERGY CAPTURE 7/13/2015 39 Table 2: summarizes the energy capture based on these performance curves for a series of control strategies. It is assumed that a 10% exceed of the rated generator capacity is acceptable.
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- 46. Power Growth Perspective in India Total identified potential: about 9000 MW West Coast Gulf of Cambay (7000 MW) Gulf of Kutch (1200 MW) East Coast The Ganges Delta in the SunderbansThe Ganges Delta in the Sunderbans in West Bengal for small scale tidal power development. Estimates peg the potential in this region to be about 100 MW We are at Abhay Ocean committed to provide Innovative Tidal Technology at competitive cost. 7/13/2015 46