Tidal Power

Tidal power is useful because it generates electricity that is renewable, free and non-polluting. So it is an excellent replacement for energy from fossil fuels (coal, oil and natural gas) which is non-renewable, expensive and polluting (that is, causing global warming).

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Tidal energy is an inexhaustible form of hydroelectric power that uses only the energy from the changing of the tides to create energy instead of burning or consuming any form of energy source to create it. Thus, it produces no unsafe greenhouse gases or hazardous waste materials.

Differentials in gravitational attraction across a solid (or liquid) body -

In other words, the moon is 8000 miles closer to a person standing directly under it ... than it is to a person standing on the opposite side of the Earth.

To make a tidal power model, you would need a water tank, a miniature turbine, and a source of moving water. Place the turbine in the water flow within the tank and observe how it generates electricity as the water moves past it, simulating the process of harnessing tidal energy. You can also experiment with different turbine designs to see how they affect power generation.

tidal energy is good because it is a renewable source that doesn't pollute the environment. It is often used to make electricity.

generating electricity without using fossil fuels or nuclear energy The uses of hydroelectricity are the same as any other form of electricity--your device can't tell the difference between hydroelectricity, coal electricity, natural gas electricity or nuclear electricity.

Hydro power plants are usually located inside the dams that hold back the rivers.

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You can see why if you take a large bowl and fill it half way with water. Now move that bowl back and forth, the water will move back and forth too..raising on one side and falling on the other then repeating. That is essentially what the ocean is doing, just on a much much larger scale. The moon also plays a role in the changes in the tide because of its gravitational pull...it actually pulls on the ocean causing the water to move.

Huge baterries made by beavers

Tidal energy is harnessed using tidal turbines or tidal barrages that capture the energy of moving water as tides come in and go out. This movement drives generators to produce electricity. The process of converting kinetic energy of the moving water into mechanical power and then electrical energy does generate some heat as a byproduct, but the primary output is electricity.

Hi nice question! Im working on a project for this.

The positives for tidal energy is that it is a renewable resource. That means the sun is involved in how it gets the power.

It also does not need to be burned to produce any bad gases like other resources to make power.

Bye!

It helps by moving the water along

Origin

The daily rise and fall in the level of ocean water relative to the coastline is referred to as tide. Tides originate from the motions of the earth, moon and sun. The gravitational pull of the Moon and Sun along with the revolution of the Earth result in tides. (The magnitude of the gravitational attraction of an object is dependant upon the mass of an object and its distance.) The moon exerts a larger gravitational force on the earth, though it is much smaller in mass, because it is a lot closer than the sun. This force of attraction causes the oceans, which make up 71 percent of the earth's surface, to bulge along an axis pointing towards the moon. Tides are produced by the rotation of the earth beneath this bulge in its watery coating, resulting in the rhythmic rise and fall of coastal ocean levels.

The gravitational attraction of the sun also affects the tides similarly, but to a lesser degree. As well as bulging towards the moon, the oceans also bulge slightly towards the sun. When the earth, moon and sun are positioned in a straight line i.e on the occasion of a full or new moon, the gravitational attractions are combined, resulting in very large spring tides. At half moon, the sun and moon are positioned at right angles, resulting in lower neap tides. Coastal areas experience two high and two low tides over a period of 24 hours and slightly above.

The presence of geographical features such as bays and inlets result in higher tides. To produce enough amounts of power (electricity) that can be put to practical use, a difference of at least five meters between high and low tides is a must. There are about 40 suitable sites around the world with this kind of tidal range. The higher the tides, the greater is the amount of electricity that can be generated from a given site. It is inversely proportional to the cost of electricity produced, making such sites also more economical. Approximately 3000 GW (1 Giga Watt = 1 GW = 1 billion watts) of energy are available from the tides, worldwide. However considering the limitations as mentioned above, only about 2% (= 60 GW) can potentially be exploited for electricity generation.

Generating tidal energy

The technology required to convert tidal energy into electricity is comparable to technology used in traditional hydroelectric power plants. The first requirement is a dam across a tidal bay or estuary. However building a dam is expensive and the best sites are those where a bay has a narrow opening, thus reducing the length of dam required. Gates and turbines are installed. When there is adequate difference in the levels of the water on the different sides of the dam, the gates are opened. This causes water to flow through the turbines, turning the generator to produce electricity.

Electricity is generated by water flowing both inwards and out of a bay. There are periods of maximum generation every twelve hours, with no electricity generation at the six-hour mark in between. The turbines may also be used as pumps to pump extra water into the basin behind the dam at times when the demand on electricity is low. This water can later be released when the demand on the system is very high, thus allowing the tidal plant to function like a "pumped storage" hydroelectric facility.

Uses and economy

The friction of the bulging oceans acting on the spinning earth results in a very gradual slowing down of the earth's rotation but this is not expected to impact us for billions of years. Therefore, for practical purposes, tidal energy can be considered a sustainable and renewable source of energy. It can prove to be a valuable source of renewable energy to an electrical system. The demand of electricity from a grid varies with the time of the day. Tidal power, although variable, is reliable and predictable and can make a valuable contribution to an electrical system, which has a variety of sources. Tidal electricity provides a good alternative to conventional methods of generating electricity, which would otherwise be generated by fossil fuel (coal, oil, natural gas) etc, thus reducing emissions of greenhouse and acid gases.

The water levels within the port are subject to change with the ocean tides. In a non-tidal port, there is usually a river feeding the water levels in the port, minimizing the effects of the moon and the tidal changes. Inland ports are almost always no-tidal. Tidal ports are almost always in coastal regions.

the tides are not affected by seasonal changes

people all around

Something intresting about elctrical energy Half the elctrical energy in the U.S.A Is fossil fuel powered. Or if that isn't Intresting enough in each bolt of lightning there is one billion volts of electicity. Also ,If your hair stands up in a storm, it could be a bad sign that positive charges are rising through you, reaching toward the negatively charged part of the storm. I Hope that's enough to answer your question

sound energy require some kind of material to travel through and they cant move through a vaccum

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Tidal power is an example of renewable energy that harnesses the natural movement of tides to generate electricity. It is a sustainable and predictable source of power that does not produce greenhouse gas emissions.

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