The World Renewable Energy Report estimates the cost of wave energy at an average of 9 cents/kWh and tidal and current an average of 8 cents/kWh. Recent EPRI reports have found that, presently, the cost of power from ocean technologies ranges from 7 cents to 16 cents/kw in a low case scenario.
Fun Facts about Wave and Tidal Energy
Tidal turbines are more expensive to build and maintain than wind turbines, but produce more energy. They also produce energy more consistently as the tide is continuous while the wind doesn't always blow.How effective is wave power? While solar energy might yield 150 watts per square meter on a sunny midday and wind power could produce 300 watts during a similar time period, wave energy has the potential to create 30,000 watts per square meter, Brekken said.
Wave power is reliable, produces no greenhouse gases and reduces our dependence on fossil fuels. Wave power devices absorb energy from waves, converting it to electricity. On-shore generators usually consist of a partially submerged shell, where sea water is free to enter and leave as the waves travel.
Wave farms
| Station | Country | Capacity (MW) |
|---|
| BOLT Lifesaver | United States | 0.03 |
| Islay Limpet | United Kingdom | 0.5 |
| Mutriku Breakwater Wave Plant | Spain | 0.3 |
| Orkney Wave Power Station | United Kingdom | 2.4 |
The wave energy is consistent and proves much better than other sources which are dependent on wind or sun exposure. No Damage to Land : Unlike fossil fuels which cause massive damage to land as they can leave large holes while extracting energy from them , wave power does not cause any damage to earth.
The World Renewable Energy Report estimates the cost of wave energy at an average of 9 cents/kWh and tidal and current an average of 8 cents/kWh. Recent EPRI reports have found that, presently, the cost of power from ocean technologies ranges from 7 cents to 16 cents/kw in a low case scenario.
There are basic types of sources used to generate electricity and are further divided into two categories; renewable & new-renewable sources.
- Fossil Fuels 67% (Non-Renewable Source): Coal 41%, Natural Gas 21% & Oil 5.1%
- Renewable Energy 16%
- Mainly Hydroelectric 92%: Wind 6%, Geothermal 1%, Solar 1%
- Nuclear Power 13%
What are Different Sources of Energy?
- Solar Energy. Solar power harvests the energy of the sun through using collector panels to create conditions that can then be turned into a kind of power.
- Wind Energy.
- Geothermal Energy.
- Hydrogen Energy.
- Tidal Energy.
- Wave Energy.
- Hydroelectric Energy.
- Biomass Energy.
Electricity is most often generated at a power plant by electromechanical generators, primarily driven by heat engines fueled by combustion or nuclear fission but also by other means such as the kinetic energy of flowing water and wind. Other energy sources include solar photovoltaics and geothermal power.
Areas of the world with abundant wave power resource include the western coasts of Scotland, northern Canada, southern Africa, Australia, and the northwestern coast of the United States, particularly Alaska.
Generating Electricity at Home
- Residential Solar Panels. Every ray of sunshine that lands on your roof is free electricity for the taking.
- Wind Turbines.
- Solar and Wind Hybrid Systems.
- Microhydropower Systems.
- Solar Water Heaters.
- Geothermal Heat Pumps.
Most Efficient Energy Sources
Although there are many types of energy, the most efficient forms are renewable: hydro-thermal, tidal, wind, and solar. Solar energy has been proven to be the most efficient and effective among renewable energy sources for home and commercial use.Flowing water creates energy that can be captured and turned into electricity. This is called hydroelectric power or hydropower. The most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir.
Wave and tidal power is considered renewable energy because we don't "use up" anything when we convert their energy to something usable like electricity.
The lack of developed supply chains for any one technology means that components are very expensive. Even at plants that are already built, the variability of tidal patterns can lower the efficiency of the turbines, according to a brief from the International Renewable Energy Association.
Intermittent: Tidal energy can only be produce electricity during tidal surges, limiting electricity generation to 10 hours per day. Expensive: Technology for generating electricity from tidal energy is relatively new and not yet commercially profitable. Tidal power plants are also expensive to build and maintain.
The technology required for tidal power is well developed, and the main barrier to increased use of the tides is that of construction costs. There is a high capital cost for a tidal energy project, with possibly a 10-year construction period. Therefore, the electricity cost is very sensitive to the discount rate.
Electricity generation potential
The total energy contained in tides worldwide is 3,000 gigawatts (GW; billion watts), though estimates of how much of that energy is available for power generation by tidal barrages are between 120 and 400 GW, depending on the location and the potential for conversion.Currently, although the technology required to harness tidal energy is well established, tidal power is expensive, and there is only one major tidal generating station in operation.
Tidal energy can be put under Human - made resources. Tidal energy is renewable ( replenishable) source of energy because tidal energy is created by the gravitational forces between the moon & the earth .
Some of the disadvantages of tidal energy are:
- High tidal power plant construction costs.
- Negative influence on marine life forms.
- Location limits.
- Variable intensity of sea waves.
That suggests an amortized annual cost of around $105 million USD. That in turn indicates a cost of electricity of around $197 per MWH or about 19.7 cents USD per KWH.
2. Basic principle of tidal power plant A dam is constructed in such a way that a basin gets separated from the sea and a difference in the water level is obtained between the basin and sea. The constructed basin is filled during high tide and emptied during low tide passing through sluices and turbine respectively.
