What Are The Practical sources Of Energy? - Part 2
Author: yoni levy
What Are The Practical sources Of Energy? - Part 2
The practical sources of energy include the fossil fuels, natural gas, petroleum (or oil), and coal. Fossil fuels are referred to as nonrenewable energy sources because, once used, they are gone. Scientists are exploring the practicality of other sources called renewable energy sources. These include sun, wind, geothermal, water, and biomass. The renewable energy resources are important in long range energy planning because they will not be depleted.
Wind
The unequal heating of the earth's surface by the sun produces wind energy, which can be converted into mechanical and electrical energy. For a long time, the energy of wind has been to drive pumps. Today windmills can be connected to electric generators to turn the wind's motion energy into electrical energy, and wind over 8 miles per hour can be used to generate electricity .It is a renewable, but unpredictable, energy source.
Wood
Wood provides U .S. homes and industries as much power as nuclear plants. Burning is the major global source of carbon dioxide in the atmosphere. Worldwide, wood is poor man's oil, providing 50-60% of the people with the barest energy necessities. Roughly half of the earth's forests have disappeared since 1950. Wood is considered a renewable energy source.
Hydroelectric (Falling Water)
When water is collected behind dams on large rivers, it provides a source of energy for the production of electricity. The enormous power of falling water is capable of turning giant turbines. These turbines drive the generators, which produce electricity. The degree of power is determined by the amount of water and the distance it falls. Hydroelectric power plants do not cause pollution, but there are fewer and fewer places to build dams. The environmental problem arises because a dam is typically built on a river creating a lake where land once stood. Water is a renewable energy
source.
Ocean Tides
Ocean tides are very powerful forces. To harness the rising and falling of the tides would be an expensive process, but it would be a very important future source for Eastern United States. Perhaps underwater windmills or floating generating stations could utilize this potential energy source to produce electricity.
Biomass
This is garbage! As bacteria decomposes organic waste such as manure, septic tank sludge, food scraps, pond- bottom muck, etc., methane is produced. This methane is the same as natural gas from the ground. There are power plants in the United States, which use methane derived from these organic wastes (mainly manure). Some cities produce electricity by burning garbage in especially designed power plants.
Nuclear Fission
This is splitting of the uranium atom. In the 1930's scientists found that splitting the nucleus of an uranium atom releases a tremendous amount of heat energy. This knowledge was used to make atom bombs. Today, power companies use the heat produced by nuclear fission to produce electricity.
Some people think nuclear energy should be our main source of future energy. Other people feel that the dangers are too great from radioactive waste products, meltdowns, and radiation exposure of workers.
Currently the nonrenewable resources supply the majority of our energy needs because we have designed ways to transform their energy on a large scale to meet consumer needs. Regardless of the source of energy, the energy contained in the source is changed into a more useful form -electricity Electricity is sometimes referred to as a secondary energy source. All the other sources are primary.
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how can i convert sound energy into electrical energy without using other energy sources?
I want to design a system that converts the sound to electrical energy and i want to store that energy too….
I want to design a system that converts the sound to electrical energy and i want to store that energy too…. there is systems that converts and store energy but i want to know how.
there is one device called green noise developed by hung jou for airport runway lights
But i dont know what technology is behind that
What are several primary energy sources that are converted to electrical energy?
Geothermal, wind, solar, hydroelectric, nuclear fission, burning stuff (coal, wood, oil, natural gas, garbage, whatever)
Really can’t. The amount of energy in sound is extremely small. One problem is area. To capture all of the energy in a sound, you have to completely surround it with your converters, and even then, a few watts is all you can get.
A speaker will work in reverse as a microphone to convert sound to electric power, but the output will be in the millivolts. At typically 8 ohms, even a volt will be only 1/8 of a watt.
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the only source which man use to generate electric energy by rotating two magnets or at least one magnet is rotating the other is fixed by cutting the fluxes sine wave energy pulses created and transmitted by electric wires, so in electric generation rotating is a must and people use water,wind mechanical energy such as burning coal, petrol, nuclear power or other fuels to force the rotators rolling by this electric energy generated and supplied by wires.
batteries are also a good source of electrical energy by making various kinds of batteries people met their low powered equipments running.
photo emissions also now a days playing a good role to make considerable electrical energies such as solar panel to fetch solar energy as electrical energy
some chemical reactions also generate electric energies those used in batteries
The amount of energy in a static charge is very tiny. In addition, it is at a very high voltage, tens of thousands of volts, and a very low current, microamps. A battery needs low voltage and high current, so they are not suitable for each other.
2. Mechanical device? Perhaps you mean a generator or alternator? These can be connected together if the generator is built for this purpose with the correct voltage output, and the correct controls are there to avoid overcharging the battery.
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How do you store electrical energy from the source?
What type of device will allow you to put electrical energy from the electrical source to a battery? Let’s take an example that you are probably familar with-the fur and rod example. If I rub the two together I get an electrical charge. Now, what would I attach to the rod and fur and what device would be able to put that electrical energy into a battery?
Example 2-How do you store the energy that is being made from a mechanical device? If you know of specific products please list them.
what are the sources of electrical energy?
let’s look at the alternatives
coal, oil, gas: generate a lot of pollution, cause global warming, and are running out. Coal alone dumps tons of Mercury into the air every year. Only advantage is that it is cheap, but that doesn’t count harm from pollutants and global warming
Hydroelectric: causes a lot of disruption from the dams, plus most useful sites are already in use.
solar arrays: Possible, but the price has to come down a lot. major problem is that you get power only when the sun is shining.
Wind arrays: Will never be useful for large scale, as they are too erratic.
Tidal, wave, geothermal: of limited usefulness.
Leaves only Nuclear: no pollution, no global warming, huge amounts of raw materials, and can be scaled up to very large power levels.
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What is the best Large Scale source of electrical energy, in your opinion? Why?
What is the best Large Scale source of electrical energy, in your opinion? Why? (Include several reasons)