To save money from the utility bill has posed a big question. Similar energy conservation has created bigger question. Tidal energy is the cheapest source of energy. And it is easily available. Tidal energy is nothing but tidal power.

Tidal power

Tidal power is a means of generating energy that is achieved by capturing the energy contained in moving water. Moving water could be in the form of tides. Two types of energies can be extracted by tides. It could be kinetic energy of currents between ebbing and surging tides and the other would be potential energy from the difference in height. The former method of generating energy from tidal currents is considered much more feasible than building barrages.

Barrages

One method of extracting tidal energy involves building a barrage. This creates a tidal lagoon, which traps a water level inside a basin. High or head is created when the water level outside of the lagoon changes relative to the water level inside. High is used to drive turbines in the water. It further leads to a decrease tidal range inside the lagoon. Implying a reduced transfer of water between the basin and the sea does this. Reduced transfer of water accounts for the energy produced by the method or system.

Tidal energy generation

Tidal power is a renewable energy source. As tides are caused by the orbital mechanics of the solar system they are considered inexhaustible within a human timeframe. The root source of the energy comes from the slow deceleration of the earth's orbit. The Moon gains energy from this interaction. This type of energy has great potential for future power and electricity generation. It is reliably predictable unlike wind energy and solar power.

Economics of tidal based power

Tidal power system has a high capital cost. It has very low running cost. A tidal power scheme may not produce returns for years however investors are reluctant to participate in such projects. Governments may be able to finance tidal power. But many are unwilling to do so due to the holdup time before investment return. Hence it becomes of due importance to recognizes the role of tidal energy however prolonged but certain output it will produce.