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Hydro Power
Renewable energy where power is created by the movement of large quantities of water.
1,373 Questions
It gets its power from rushing water. But just because you live by an ocean doesn't mean its rushing water.
What is the availibility of hydroelectricitY?
Hydro power is available 24/7. Electric power generation from hydroelectric powerhouses is placed on line whenever water with enough head is available to make electricity. However, and since the primary purpose of dams is to store and provide water for irrigation purposes, hydro power availability is heavily controlled by the amount of water needed below the dam.
Why is hydro power better for the earth?
Hydro-power is the cleanest source of energy. It is powered by the force of flowing water which turns the generator to generate electricity. Considering the amount of CO2 released in the atmosphere and its consequential global warming effects, Hydro Power is considered safest, cleanliest and most favour form of generating power. Even the UNFCCC provides highest credit for Hydel Projects.
How much is hydro power used in the world today?
Hydroelectric power now supplies about 715,000 megawatts, or 19% of the world's electricity. (2009)
How did George Washington use the force of water to power work?
He used the water wheel to generate electriecty
Does hydroelectric energy cause acid rain?
Not when up and running.
But the installation of a hydroelectric installation will - like almost all human activities - contribute a little to acid rain as it requires factory production and transportation using fossil fuels.
What it the disadvantage of hydro?
Many things might be a problem with hydroelectric generation. A dam blocks the river and floods a large area of land. Dams block migratory routes of fishes like salmon. Dams regulate river flow and usually prevent seasonal flooding. The absence of seasonal flooding changes downstream ecosystems.
Disadvantages of Hydroelectric Energy....
· Impact: Where there was once a free flowing river, there is now a large lump of concrete and metal. The possible effects of this on the river life can be devastating. Habitats become separated; fish and animals cannot reproduce or even feed on fish downstream and find their food source.
· Size: These dams are very large, and I could understand objection to their construction on aesthetic grounds.
· Expense: A common theme in renewable energy, dams are not cheap to build. Just think of the vast effort required to divert a river long enough to dam it, the amount of material required and extreme safety measures which must be put in place for the dam to be made safe. A lot of investment is required.
The disadvantages are that the change in water flow will effect the fish and making space to put the hydro facility can cause the deaths of plants and animals as well as destruction of habitat.
It can kill lots of fishy. Also, it affects the river downstream from the dam built.
it is danger for human being in case of electric shock
it is danger for human being in case of electric shock
- It can be renewable
- Is inexpensive
The disadvantages are - It can be dangerous to aquatic ecosystems. - People need to relocate where the reserviors are planned - It can produce large amounts of methane and carbon dioxide in tropical regions. - Failures of large dams may kill people and leave some of them homeless.
dangerous to aquatic ecosystems, can produce large amounts of methane and carbon dioxide in tropical regions, dams are very expensive to build.
the disadvantages are - it can be dangerous to aquatic ecosystems.
- People need to relocate where the reserviors are planned
- It can produce large amounts of methane and carbon dioxide in tropical regions.
- Failures of large dams may kill people and leave some of them homeless.
Disadvantages
- The dams are very expensive to build.
However, many dams are also used for flood control or irrigation, so building costs can be shared.
- Building a large dam will flood a very large area upstream, causing problems for animals that used to live there.
- Finding a suitable site can be difficult - the impact on residents and the environment may be unacceptable.
- Water quality and quantity downstream can be affected, which can have an impact on plant life.
Hydroelectric power plants do NOT, however, produce methane or carbon dioxide or any other harmful gas, in tropical regions or anywhere else. Nor do they have direct negative effects on the quality of the water they use.
One key environmental issue in recent years is the allegation that new hydro facilities, especially those installed at existing dams, can act to prevent aeration of the water that may occur when the water passes through the dam's gates or valves, thereby reducing levels of dissolved oxygen downstream. This effect is of particular concern on waterways that are heavily developed, such as the Colorado River hydro and irrigation system and the Ohio River navigation system. In such systems, it is feared that the non-aeration at each sequential installation would accumulate in such a way as to allow the dissolved oxygen levels to drop below what are needed to support the stream's ecosystem.
Other disadvantages of hydroelectric power include high initial cost and low dependability factor, mainly due to the obvious dependency on rainfall.
What is the efficiency of hydro power dams?
Depending on the size and construction, hydroelectric dams can capture up to 90% of the available energy. Smaller generators may provide as little as 50%.
A major consideration is the volume of particulates (silt) impounded by a dam. This may require some energy be allowed to escape.
Is hydro power renewable energy source?
yes, hydro-power is considered a renewable energy source because it is easily gained and easily "re-made". Other Examples of this is biomass, geothermal energy and windpower. non-renewable energy is considered anything that takes a LONG time to make, like millions and billions of years! an example is oil, coal or natural gas.
What are the advantages of hydro-electric power?
It's "fueled" by a natural process, rain. You don't have to go truck in railroad cars full of coal or pipe in petroleum products. As long as there is no severe drought (and it would have to be very severe, as such waterways typically have a lot of locks etc.) you have power. Since it neither adds nor subtracts from the water, it is nonpolluting.
Where in the united states is hydroelectric energy used?
Hydroelectric power is, of course, generated in areas that have the right sort of topography. Mountainous regions are often appropriate, because they allow for the formation of large, deep reservoirs, such that the retained water accumulates a great deal of gravitational potential energy. Naturally the large, powerful rivers of great continents have more potential for the generation of electricity than the more humble ones of, for example, Britain.
The question of where the electricity is actually used is a slightly different one. High voltage wires allow for the relatively efficient transmission of electricity over long distances. And within a particular electric grid, it isn't usually valid to say that your electricity comes from any one particular source of the several that may be connected.
However, very little electricity is transmitted across international borders, so by and large those countries which generate the most hydroelectricity are also those that use the most.
At present China's hydroelectric capacity is greater than that of any other country, and many massive projects there are yet to be completed. Canada, the USA and Russia are among the next nations in line. Washington State uses the most hydroelectric energy within the USA, whilst the 'La Grande' facility in northern Quebec contributes to Canada's energy needs.
It should be noted, however, that when expressed as a percentage of total energy consumption, the significance of hydroelectricity within these countries diminishes.
Notable Hydroelectric Nations
Nations including Norway, Iceland, Brazil, Nepal and Tanzania come to the fore as the countries that derive the greatest proportion of their energy needs from clean, renewable hydroelectricity.
I have a secret for you... its powering your computer right now...
As long as its the correct voltage and frequency, you can feed it into the national grid.
Your mom is fun
How might the building of a hydroelectric power station affect the environment?
The major impacts are associated with dams and reservoirs related to the power plants.
Reservoirs cover land which was previously in vegetation or forests,. Once underwater the plants decompose anaerobically releasing methane, a powerful greenhouse gas.
In addition the flooded land may have contained eco-systems needed for plant or animal habitats.
On the plus side - hydroelectric plants may replace coal fired plants reducing the emissions of carbon dioxide and acid gas components.
Hydroelectric power plants have a very small effect on the environment, considering the average age of an existing powerhouse in the United States is over a half century, and they release no pollutants into the air.
Which emulsifying agent should you use to make it a clear micro emulsion of essential oils in water?
Sodium Choleate- it is a bile salt that serves as an emulsifying agent; which aids in the suspension of triglycerides in water. I'm not going to lie, I do not know how or why, but I just did it in my chemistry class last week.
What are the different types of Turbines used in hydroelectric power plants?
1 Pelton Turbine
2 Kaplan Turbine
3 Francis Turbine
4 Propeller Turbine
5 Tubular Turbine
How does hydro energy make energy?
Hydroelectric energy uses the potential energy of a mass of water in a high reservoir, that is released by running the water down pipes so that it gathers speed and eventually hits turbine blades to rotate a shaft that turns an electric generator.
The potential energy of the water comes from the Sun, which evaporated the water from the sea or other place and deposited it at a high level via rain on the upper part of the mountain.
What is a hydroelectric plant?
Hydroelectric plants use moving or falling water to turn a generator and produce electricity. They usually have generators located at the base of a dam, and they raise the level of water behind the structure. The higher the water level behind the dam, the more potential energy it has. And by releasing water, the potential energy can be converted into kinetic energy to turn the turbines which turn the generators. The height of the water is called the head of water. Hoover and Grand Coulee Dams are very high, and have a lot of head. Lest you think dams like those are the only dams producing electricity, you should be aware that there are many low head hydros around the country. There are 8 or 9 in Michigan, which is not generally associated with hydroelectric power production. There are a number of others around, too. Long ago, the waterwheel harnessed the power of moving or falling water to provide mechanical energy to turn mill stones or power other machines. As our technology evolved, we extended the idea to make it what it is today. And in the present, we see most big hydroelectric plants in the U.S. located in the west. (Niagra is a bit of an exception.) It's because the geography out west includes the high elevations as well as the water to make dam construction (with the associated hydroelectric plant) possible.
What is the power output of 100 kw power plant?
Your question shows the importance of using the correct symbols, because your symbols are incorrect and, therefore, your question is confusing.
So, are you asking how many milliwatts (mW) there are in a kilowatt (kW), or are you asking how many megawatts (MW) there are in a kilowatt(kW)?
Notice that the symbol for a watt is an upper-case W. The symbol for a milli is a lower-case m, and the symbol for a mega is an upper-case M.
If the former, then there are one-thousand milliwatts in a watt, and there are one-thousand watts in a kilowatt, so there must be one-million milliwatts in a kilowatt.
If the latter, then there are one-thousand kilowatts in a megawatt, so a megawatt must be one-thousandth of a megawatt in a kilowatt.
How much space does it take to build a dam?
It can take up to at least five years to build a hydroelectric dam.
How much does it cost to build a hydroelectric power plant?
What I've been able to find for the Hoover Dam says ~$50 million in the 1930's, today that's roughly $690 million. The entire Boulder Canyon Project cost around $165 million, which included the Hoover Dam.
The Hoover Dam has 17 hydro electric generators, capable of generating 2,074MW, which is quite large. The cost of a hydroelectric dam will be dependent on the river it crosses, the storage lake (how big does it need to be, is it man made, or already present, etc.), and how big it will be (how much electricity can it generate), and a host of other factors. I know of a 45MW (enough to power a small town, say 20,000 people) that cost $7.3 million in the 1930's.
this is a question with several differant answers..... depending on consuption if its going on a consuming structure co-generating or a stand alone generation station. the most cost effective would be a hybrid thermal/photovoltaic the thermal would heat a closed contained liquid and make steam to turn large turbine. $150,000US will get u quite the little generator. $1,000,000US u have a major player my general rule is $15us per sq ft of heating/cooling space. I am presently puting together the single largest solar project of its kind. entire subdivisions of low cost modular homes with the entire roof as the mini-generating station. so if u put up say 400 units. when this hole subdivision comes on line u have a major Generating Station. maitaining a plant with no moving parts to wear-out, well except to send some one to clean the panels off once every 6 months wound not be much up-keep...... the panels have 20 to 25yr warrenties and 30yr life some put up in the late 60's r still generating. JD Polk, founder&ceo
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How many countries use hydroelectricity?
Quebec , Canada uses hydro power because of it's many rivers.
How much does it cost to build a water turbine?
A small home use Hydroelectric turbine costs about 5,000 if you want a good turbine and 2,500 dollars if you want a cheap but not efficient turbine.
Can Hydro power be used in schools?
It depends on a number of things. It is clean and non-polluting, but ask yourself first:
-Is there any particular group or individual who is pushing the idea and would stand to benefit from it?
(eg on the School Council, Board of Management, Real Estate agents, political and environmental issues )
-What about caveats on the land and legal encumbrances etc
-When is it to be used?
-What purpose/s ?
-Why
Is it to be the sole power source for the school or not?
-If it is, is the water supply constant and utterly reliable, or is it intermittent?
(eg Things like drought, global warming and climate change, upstream irrigators, development projects, towns and housing estates etc)
If it is not to be the sole power source:-
-Is it for back-up, (either now or in the future)?
-Is it for self-promotion or publicity
-Is it for actual educational purposes?
(eg showing how to generate electricity, science projects etc)
How does deforestation affect a hydroelectric power plant?
A basin covered with dense vegetation will show 1) less evaporation and 2) less seasonal variability in the rivers flowing to the reservoir. The more the water supply fluctuates through the year, the larger a reservoir needed to maintain a minimum level during dry months.
If deforestation occurs in a basin that supplies water for an existing hydro plant, seasonal variations may start to be observed (i.e., too much water during rainy months and not enough during dry months). Excess water will overflow the reservoir and is useless for power production. Eventually, power production will start to decrease and fuel plants will have to be used to produce the extra power during demand peaks as follows:
If the water level was ever allowed to go below the intake pipe, the turbines can no longer operate. Before that happens, the plant operators would selectively shut down turbines to reduce the rate of depletion of the reservoir, and during demand peaks the power that is not produced by the idle turbines would need to be produced by alternative sources, typically thermoelectric (fuel) plants.
