Showing posts with label energy. Show all posts
Showing posts with label energy. Show all posts

Saturday 7 September 2013

Merits and Demerits of Atomic Energy

Merits of Atomic Energy:

✔ Produces large amount of Energy
Nuclear reactions unleash 1,000,000 times additional energy, as compared to hydro or wind energy. Hence, an over sized quantity of electricity are often generated. Presently, about 10-15% of the world's electricity is generated through energy. Did you recognize that one kilo of uranium-235 about produces the maximum amount energy as 1,500 tons (1,500,000 kilograms) of coal?

✔ 'Green' Energy
The biggest advantage of this energy is that greenhouse gases (carbon oxide, methane, ozone, chlorofluorocarbon) don't seem to be discharged throughout a action. Greenhouse gases area unit a significant threat within the current situation, as they cause heating and temperature change. As there's no emission of those gases throughout action, there's little impact on the surroundings.

✔ No pollution
The burning of fossil fuels ends up in production of carbonic acid gas and smoke. it's a menace to the surroundings in addition as human life. Production of energy doesn't emit smoke, hence, there's no direct pollution. However, disposal of radioactive material could be a major issue these days.

✔ Fuel Independence
Nuclear reactors create use of U as fuel. Fission reaction of a little quantity of U generates an over sized quantity of energy. Currently, the reserves of U found on the planet area unit expected to last for an additional one hundred years. Secondly, victimization this energy will create several nations energy freelance, and not enthusiastic about those unearthing fossil fuels.

nuclear_plant


Demerits of Atomic Energy:

✘ Radiation
Accidental unleash of harmful radiation is one in every of the most important drawbacks of energy. The fission method releases radiation, but, is controlled in an exceedingly reactor. Now, if these safety measures fail, the radiation might are available in contact with the surroundings, leading to severe harm to the scheme and loss of life.

✘ nonrenewable
Although they manufacture great deal of energy, nuclear reactors depend upon U, that is AN exhaustible fuel. Its extinction will once more cause a grave downside. Once exhausted, the reactors are of no use, can ought to be ending, however can stay occupying massive space of land, and contaminating the surroundings.

✘ Developing Nuclear Weapons
This energy are often used for production and proliferation of nuclear weapons. Nuclear weapons create use of fission, fusion, or combination of each reactions for harmful functions. they're a significant threat to the globe as they'll cause a large-scale devastation. Their effects are often ascertained for several generations (e.g., atomic bombings of Hiroshima and Nagasaki).

✘ large Building value
Though great deal of energy are often made from a atomic power plant, it needs massive cost of capital. Around 10-15 years area unit needed to develop one plant. it's not terribly possible to create a atomic power plant. Secondly, one cannot ignore the actual fact that the nuclear reactors can work as long as U is accessible.

✘ Nuclear Waste
The waste made once fission reactions contains unstable parts, and is very hot. it's terribly dangerous to the surroundings in addition as human health, and remains therefore for many years. It desires skilled handling and may be unbroken isolated from the living surroundings. The radiation of those parts reduces over a amount, once decaying. Hence, they need to be rigorously hold on and disposed. it's terribly troublesome to store hot parts for a protracted amount.

✘ atomic power Plant Accidents
There are 2 most fatal atomic power plant accidents to date: the Chernobyl disaster that occurred at the Chernobyl atomic power Plant (1986) in state, and therefore the Fukushima Daiichi nuclear disaster (2011) in Japan. great deal of radiation was discharged within the surroundings once these incidents, resulting in fatalities, harm of nature, and land. One cannot deny the chance of repetition of such disasters in future.

✘ Transport of Fuel and Waste
Transport of U fuel and therefore the radioactive material is extremely troublesome. U emits some quantity of radiation, and hence, has to be handled with care. Secondly, the nuclear waste made is additional risky and wishes further protection. All transportation means that ought to follow the international safety standards. though no accidents or spills area unit reportable as of currently, the transportation method continues to be difficult.

Thursday 5 September 2013

Merits and Demerits of Wave Energy

Wave Energy is the transport of power by ocean surface swell, and the arrest of that power to do useful work – for demonstration, electrical energy lifetime, water desalination, or the pumping of water (into reservoirs). mechanism adept to exploit wave power is usually known as a Wave Energy Converter (WEC).        

Merits of Wave Energy:


1. Renewable: The best thing about Wave Energy is that it will not ever run out. There will always be waves smashing into upon the coastlines of countries, beside the populated coastal districts. The waves flow back from the seashore, but they habitually return. Unlike fossil fuels, which are running out, in some locations in the world, just as rapidly as people can find out them. different ethanol, a corn product, swell are not restricted by a season. They require no input from man to make their power, and they can always be counted on.

2. Natural environment Friendly: Furthermore different fossil fuels, conceiving power from swell creates no harmful byproducts such as gas, waste, and contamination. The power from swell can be taken directly into electricity-producing mechanism and used to power generators and power plants nearby. In today’s energy-powered world, a source of clean energy is hard to arrive by.

3. Abundant and Widely Available :Another advantage to utilizing this power is its nearness to locations that can use it. allotments of large-scale towns and harbors are next to the sea and can harness the power of the swell for their use. seaboard towns tend to be well-populated, so allotments of persons can get use from Wave power plants.

4. Kind of Ways To Harness : A last benefit is that there are a kind of ways to accumulate it. Present accumulating procedures variety from installed power vegetation with hydro turbines to seafaring vessels equipped with massive organisations that are prepared into the ocean to gather the Wave Energy.
wave energy

5. Effortlessly Predictable : The large-scale advantages of Wave Energy as against most of the other alternate energy causes is that it is effortlessly predictable and can be utilized to assess the allowance that it can make. The wave power is consistent and verifies much better than other sources which are reliant on breeze or sun exposure.

6. Less Dependency on Foreign Oil Cos : Dependence on foreign companies for fossil fuels can be reduced if power from wave power can be extracted up to its greatest. Not only it will help to constrain air contamination but can also provide green occupations to millions of persons.

7. No Damage to Land : different fossil fuels which origin massive impairment to land as they can depart large apertures while extracting energy from them , Wave Energy does not origin any damage to soil. It is protected, clean and one of the favored procedure to extract power from sea.

Demerits of Wave Energy:

1. Apt to Certain positions : The biggest handicap to getting your power from the swell is location. Only power plants and towns near the sea will advantage directly from it. Because of its source, Wave Energy is not a viable power source for every person. Landlocked countries and towns far from the ocean have to find alternate sources of power, so signal power is not the clean energy answer for every person.

2. Effect on marine Ecosystem : As clean as Wave Energy is, it still conceives hazards for some of the creatures beside it. Large appliances have to be put beside and in the water to accumulate energy from the swell. These appliances distract the seafloor, change the environment of near-shore creatures (like crabs and starfish) and conceive disturbance that distracts the ocean life around them. There is also a hazard of toxic chemicals that are used on wave power stages spilling and polluting the water beside them.

wave energy
Wave energy Plant
3. Source of Disturbance for Private and Commercial Vessels : Another downside is that it disturbs financial and private vessels. Power plants that accumulate signal power have to be put by the seashore to do their job, and they have to be near towns and other populated areas to be of much use to any person. But these are locations that are foremost thoroughfares for cargo ships, cruise ships, recreational vehicles and sandy shore goers. All of these people and vessels will be disrupted by the setting up of a wave power accumulating source. This means that government agents and private companies that want to invest in signal power causes have to take into account and address the needs of those they may be distracting.

4. Wavelength : breeze power is highly reliant on signal length i.e. signal pace, signal extent, signal length and water density. They require a reliable flow of mighty waves to develop important amount of signal power. Some localities experience unreliable signal demeanor and it becomes unpredictable to outlook accurate signal power and thus will not be trusted as reliable energy source.

5. Feeble Performance in uneven climate : The presentation of signal power lets slip significantly thunderous uneven climate. They must withstand rough climate.

6. Disturbance and Visual contamination : signal energy generators may be unpleasant for some who live close to coastal districts. They gaze like large appliances working in the middle of the ocean and decimate the attractiveness of the ocean. They furthermore generate disturbance contamination but the disturbance is often enclosed by the disturbance of swell which is much more than that of signal generators.