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Tidal Power
Tidal Power is the energy of the moving water of the tides, which can be harnessed to generate electricity. This is a green, renewable energy of the future.
352 Questions
Trace the energy in a ham and cheese sandwich back to the sun?
This is the sequence of events which make a ham and cheese sandwich:
- Energy from the sun is absorbed by plants. These photosynthesise and grow using this energy. One of these plants is wheat.
- Wheat is ground to make flour. Animals eat the other plants. These animals include pigs and cows. Eating the plants transfers the energy from the plants to the animals.
- The ham comes from the pig. The cow produces milk, which is turned into cheese. The bread is made from the flower.
What are tiny plant like creatures that get their energy from the sun?
Solar powered sea slugs get their energy from the sun and are able to extract algae chloroplasts in order to photosynthesize themselves. Some scientists have speculated on the possibility of inserting these genes into Human DNA to explore possibilities of curing physical defects.
Depends. It certainly can do; an example of a tidal power project potentially destructive to the marine environment is the proposed Severn Barrage, which basically dams the Severn estuary between England and Wales. There are also completely non-invasive ways of producing tidal power, such as the the 'snakes' which float on the water off the coast of Portugal (see link). As yet these more advanced methods are less effective though.
In 1999 about percent of the world's energy needs were met through hydroelectric means?
In 1999, approximately 16% of the world's energy needs were met through hydroelectric means.
Unilateral rise and fall of the chest is a sign of?
Unilateral rise and fall of the chest is a sign of uneven chest wall movement, which could indicate a respiratory condition such as pneumothorax (collapsed lung) or pleural effusion (build-up of fluid around the lung). It is important to seek medical attention if this is observed.
How long does it take to build a tidal power station?
The time it takes to build a tidal power station can vary depending on factors such as the size of the project, location, environmental permits, and construction challenges. On average, it can take around 3-5 years to complete the construction of a tidal power station.
When are the tidal currents strongest?
Tidal currents are strongest during the peak of high and low tides when the water level difference between two areas is greatest. This typically occurs around the times of high and low tide, when the gravitational forces of the moon and sun align.
Where is tidal energy obtained from?
Tidal power operates by damming the mouth of a river or other water source that leads into the ocean. When the tides come in (tides are created by the gravitational pull of the moon) the dam lets water flow through. At the peak of high tide the dam is closed until the peak of low tide. Then the dam is opened and turbines are powered by the water flowing out into the ocean due to the water level difference. To learn more about how tidal power works check the related link.
How often does the tide rise and fall?
Tides typically rise and fall twice a day, every 12 hours and 25 minutes, due to the gravitational pull of the moon and sun on the Earth's oceans. This regular pattern of the tide rising and falling is known as the tidal cycle.
Is tidal volume of 700 abnormal?
A tidal volume of 700 mL is within the normal range for an adult. Tidal volume can vary depending on factors like age, sex, and body size, but typically ranges from 500-800 mL for adults during quiet breathing. If there are concerns about tidal volume, it's best to consult a healthcare provider for further evaluation.
The periodic daily rise and fall of ocean water?
The periodic rise and fall of ocean water is known as the tidal cycle. It is caused by gravitational forces exerted by the moon and the sun on the Earth's ocean water, resulting in bulges of water that move around the planet as the Earth rotates. Tides typically occur twice a day, causing high tide and low tide.
What is the full form of VIVACE?
VIVACE - Vortex Induced Vibrations for Aquatic Clean Energy. A form of power from wave and ocean currents. A team from University of Michgan, USA, is working on this.
Tidal energy has been harnessed by humans for centuries, but its discovery cannot be attributed to a single individual. Early civilizations like the Romans and Greeks used tide mills to grind grain, demonstrating early utilization of tidal energy. Today, modern technologies are used to capture tidal energy and convert it into electricity.
Is Hydroelectricity a form of tidal power?
hydroelectric is not a type of tidal power. the speed of the water going down the tube starts a giant elastic band revolving. this then causes magnetism and starts a motor. so even though it is to do with water it is not the tide that is causing it but the water running down a hill in a tube. Agent Wolf
How does the periodic nature of tides explain why tidal power is not a steady source of energy?
Tidal power generation depends on the cyclic rise and fall of tides, which are influenced by the gravitational forces of the moon and sun. This periodic nature means that tidal energy is not constant, as tides occur at specific times of the day and are subject to variations. This inconsistency makes tidal power less predictable for continuous energy production compared to sources like solar or wind.
How do utility companies that use tidal power provide energy when their customers need it?
Utility companies that use tidal energy would also use other ways of generating power, because tidal energy can only be collected when tides come in or out, that is, usually four times a day. Most utility companies would have access to the national grid and feed their tidal power into it. They would be able to draw on power from other sources when the tide was quiet.
Tidal energy has high upfront costs for infrastructure installation, but operational costs are relatively low. Its cost competitiveness varies depending on factors such as location, technology, and scale. Advancements in technology and efficiencies in operation have the potential to make tidal energy more cost-effective in the future.
What does a rise and fall of pressure occur with?
A rise and fall of pressure typically occurs with changes in weather systems. For example, high pressure systems are associated with clear, calm weather, while low pressure systems are associated with cloudy, stormy conditions. These pressure changes can be felt in our bodies and can also impact our mood and well-being.
Where is the third highest tidal rise and fall?
The Bay of Fundy in Canada has the third highest tidal range in the world, with an average range of 16.3 meters (53 feet).
What are the disadvantages of an oil fired power station over a tidal power station?
Oil fired power stations contribute to air pollution and greenhouse gas emissions, while tidal power stations have minimal environmental impact. Oil fired power stations are dependent on a finite resource, whereas tidal power is a renewable energy source. Additionally, tidal power stations have predictable energy generation patterns, while oil prices can fluctuate.
Which countries use wave power?
Countries that use wave power to generate electricity include Portugal, United Kingdom, Australia, and United States. These countries have suitable coastlines that receive consistent wave energy, making it an attractive renewable energy source for power generation.
Where the wind energy source is found and how it is recovered?
Wind energy is harnessed from wind turbines, typically found in locations with steady wind patterns such as open plains, coastal areas, or mountain gaps. The wind turns the blades of the turbine, which in turn rotates a generator to produce electricity. This electricity is then fed into the grid for use in homes and businesses.
True. The oscillating water column is a device that converts wave energy into electricity. Waves entering a shaft cause the air inside to oscillate, generating pressure changes that drive a turbine connected to a generator to produce electricity.
What are the disadvantages of renewable tidal power as an energy source?
- Tidal power plants can only be put where there is sufficient tidal flow. This limits the number of them and the places they can power.
- Tidal power is often very expensive.
- The turbines used can kill appreciable numbers of fish. They can also prevent the movement of fish up and down rivers that might be essential spawning grounds.
- They can often cause difficulties for the movement of shipping.
- There are environmental changes that happen when tidal lagoons or barrages are built. One is the change in salinity of the water in inlets. Another change is increased turbidity (how unclear the water is) and sediment.
- Compared to other energy sources, this is not too bad, but it seems to be only a small part of the answer to our energy needs.
A:
- Holding back the tide allows silt to build up on the river bed.
- The dams and barrages sometimes interfere with shipping.
- You will need to find a way to connect the electricity to the grid.
- Pose same threats as large dams, altering the flow of saltwater in and out of estuaries, which changes the hydrology and salinity and possibly negatively affects the marine mammals that use the estuaries as their habitat
- Turbidity decreases as a result of smaller volume of water being exchanged between the basin and the sea.
- The average salinity inside the basin decreases, also affecting the ecosystem
- A barrage across an estuary is very expensive to build, and affects a very wide area - the environment is changed for many miles upstream and downstream. Many birds rely on the tide uncovering the mud flats so that they can feed.
- There are few suitable sites for tidal barrages.
- Only provides power for around 10 hours each day, when the tide is actually moving in or out.
- It only provides about 7% of the power needed for England and Wales that means that some people get their energy close to free and some pay a lot of money
- Water is not replenished, it cannot flow away so any dirt or pollution lingers around the coast much longer
- Needs a very big piece of sea to be cost effective
- Cannot be used inland
- Barrage systems require salt resistant parts and lots of maintenance
- Affects the lives of the people who rely on fishing for a means of living
- Limited because the tide never speeds up or slows down, and occurs on 6 hour cycles. It is also dependent on the fetch distance. The fetch is the distance the tide rises and falls, so some beaches have a very small fetch, and others have a big fetch but hardly any have a large enough fetch to support tidal energy
- Tidal energy is currently more expensive to generate than conventional energy or that from many other renewable sources.
- Effects on marine life during construction phases.
- Operation and control must be provided remotely and maintenance is complicated due to sea-basing of the generation facilities.
- Sea-based moorings and towers to hold the generators must be placed on the sea bottom.
- The generating facilities and mooring infrastructure are potential navigational hazards.
- Is only available in a small number of regions - it requires a basin or gulf that has a mean tidal amplitude of 7 meters or more. Also need semi-diurnal tides where there are two high and low tides everyday.
- Even with the best barrage designs, fish mortality rate per pass through the barrage is about 15%. Solutions to this problem have either failed or are too impractical and too expensive.
- Dams used in the production of tidal power can raise tide levels.
- Damages like reduced flushing, winter icing and erosion can change the vegetation of the area and disrupt the balance.
- Expensive to construct
- Power is often generated when there is little demand for electricity
- Barrages may block outlets to open water. Although locks can be installed, this is often a slow and expensive process.
- Barrages affect fish migration and other wildlife- many fish like salmon swim up to the barrages and are killed by the spinning turbines. Fish ladders may be used to allow passage for the fish, but these are never 100% effective. Barrages may also destroy the habitat of the wildlife living near it
- Barrages may affect the tidal level - the change in tidal level may affect navigation, recreation, cause flooding of the shoreline and affect local marine life
- Causes a continual loss of mechanical energy in the Earth-Moon system (Due to pumping of water through the natural restrictions around coastlines and viscous dissipation at the seabed and in turbulence.
- Loss of energy has caused the rotation of the Earth to slow in the 4.5 billion years since formation losing 17% of its rotational energy.
- May take additional energy from the system, increasing the rate of slowing over the next millions of years.
Where is tidal power being used now?
France has the biggest tidal power plant on the face of the earth, unfortunately the only tidal plant in Europe.
Tidal power uses energy in ocean movement (waves) to generate electricity.
Tidal power, sometimes called tidal energy, is a form of hydropower that converts the energy of tides into electricity or other useful forms of power. Although not yet widely used, tidal power has potential for future electricity generation. Tides are more predictable than wind energy and solar power. Historically, tide mills have been used, both in Europe and on the Atlantic coast of North America.
