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Green Alternative Energy & Renewable Energy Resources
What is green alternative energy?
Renewable energy is just that, an energy source that can be used over and over again, energy generated from natural resources from the world around us.
You are likely familiar with most of the renewable green energy resources, as these in recent years have enjoyed a sustained growth as we seek to find more power from natural energy resources in an effort to move on from the constant use of fossil fuels, which damage our global ecosystems.
The most common green alternative energy / natural energy resources are sunlight (solar), wind, rain, tides and geothermal heating. According to recent figures '06 approximately 18 percent of worldwide final energy was provided by natural energy renewables, around 13% of this natural energy came from biomass fuels (wood and natural matter). The next largest supply of natural alternative green energy came from Read more
Yes really, more than and beyond the definition of the word ‘serious’. Used cooking oil from your everyday frying of chicken, fries and pork can now be used as fuel for your cars through recycling. These are called Biodiesel and it has started a revolution as an alternative to expensive fossil or mineral oil.
The first known and recorded use of vegetable oil as fuel in an engine was a demonstration of a diesel engine built by the Otto Company and was designed to burn mineral oil, which was then run on pure peanut oil at the 1900 World's Fair. After several years of research, Rudolf Diesel, inventor of the diesel engine, investigated using vegetable oil to fuel the engines he designed.
He presented this idea in 1912 to the British Institute of Mechanical Engineers and successfully cited a number of efforts in this area and he envisioned that though regular cooking oil or vegetable oil sources may seem insignificant back then, the fact that such oils would perhaps have the same importance as natural mineral oils and the tar products in due course of time.
From then on, numerous groups had started an obsession on the research into cooking oil as a diesel substitute. The use of vegetable oil in the mainstream had enjoyed its success during the early 1980s at the height of the spiraling prices and shortages of petroleum and other mineral oil.
How is it made to work with automobiles? Inventors and developers would say it simply as recycling the oil and applying the same concept in refining petroleum oil. They commonly joke as if it’s just like making coffee. The mixture is just simple: a used cooking oil of typically vegetable or coconut sources, a methanol and a catalyst which is composed of potassium and sodium.
The said mixture of three (cooking oil, methanol and catalyst) doesn’t require heating from expensive pumping stations and can be made easily, even at home provided one has the proper knowledge, tools and storage. A generally accepted mixture of 100 liters of cooking oil (costs around $0.50 per liter) plus 20 liters of methanol (usually at $1) plus one kilo of catalyst (costs around $3.5) can create 100 liters of biodiesel as well as an excess of 20 liters of glycerin (which can be used as main ingredient for everyday bath and laundry soap).
What’s more surprising is that it was tested in an unmodified older Mercedes Benz and ran for hundreds of miles during a 2006 University of Idaho invention exhibit.
Today, countries like Russia, Azerbaizan, India, Bulgaria, Paraguay and the Philippines have implemented extensive development of used cooking oil or vegetable oil to power up vehicles as well as other machineries. Major automobile manufacturers like Honda, Toyota, Ford and General Motors have slowly introduced newly designed automobile engines that support the use of Biodiesel fuel especially with the rising prices of petroleum and the collapse of the US and other European economy.
Instead of filling up your car, truck or heavy machinery like tractors with regular diesel, consider a more “green” alternative that will also be nicer on your wallet. Biodiesel is an alternative to regular, fossil fuel based diesel and there are many advantages to using it. There are 4 main reasons that you should use biodiesel and if you know and understand them, then there is no chance that you will opt to use something else ever again unless it is absolutely necessary or no other choice is available.
The best reason to use biodiesel is that it is a renewable source of energy, unlike fossil fuels. Biodiesel is made with organic bases and therefore can be grown is the amounts necessary to supply the diesel vehicles on the road. The best crops for the production of biodiesel include rapeseed or coleseed, peanuts, soybeans, sunflowers and or oil palms. Other plants that have high natural vegetable oil content can also be used and the possibilities are practically endless since research is constantly developing better biodiesel from resources that are readily available in abundance.
Another good reason to use biodiesel is that also burns cleaner in a combustion engine than fossil fuel based diesel. This has immense advantages both for now and in the long term. Cleaner burning means less destructive emissions coming from diesel engines and that in turn leads to a reduction in greenhouse gases. There is also a reduction in pollution and if all diesel powered vehicles run on biodiesel there will be a noticeable improvement in the air you breathe. A little known fact is that biodiesel is the only alternative fuel source that has ever passed all the requirements of the American Clean Air Act.
Using biodiesel instead of fossil fuel based diesel will also probably leave you with more money in your wallet after a trip to the gas station. This is because as a general rule, biodiesel costs less than regular diesel. This is not only a real alternative for your car, truck or tractor, but it can also be used for home heating. People that heat their homes with oil burners will know that the “oil” in the tank is just diesel and that can be replaced with biodiesel without many problems. The savings can be great and who doesn’t want to save money.
Last but not least, biodiesel also has a better biodegradation rate than regular diesel and that means that it is less toxic and more quickly and completely be degraded. Since it is also more easily burned a car’s engine and all the parts will suffer less wear and tear than if regular fossil fuel based diesel was used. This means for the driver that the vehicle will need less maintenance, repairs and can be driven longer.
Bioethanol fuel is supposed to be the great alternative to fossil fuel bases gas and diesel. Many are praising its benefits and talk about all the good properties it has. This is true, but before making something out to be so wonderful it is also important to look at the other side of things and then compare them both. Only by weighing both the pros and cons will you be able to determine if bioethanol is all that it’s cracked up to be.
The biggest advantage to bioethanol is that it is made with resources that are renewable. This means that the supply is never-ending and once used more of the same resources can be harvested. This is so easy to do because biotethanol is made from recently dead biological materials or in other words, plants. There are tow kinds of crop types that are suitable for processing into ethyl alcohol which is nothing other than ethanol. It is referred to as bioethanol because it is based on biological materials and is a cleaner source of energy.
The crops that can be used as sources of bioethanol are all easy to grow inexpensive to buy and cultivate and are readily available in almost every country because of the diversity of plants that can be used for this purpose. The crops have to have high amounts of starch, sugar or vegetable oil. Commonly used plants are rapeseeds, peanuts, sugar cane, sugar beet, sweet sorghum, jatropha, oil palm, soybeans and corn. More recently plants with cellulose have shown promising results and bioethanol has already been made with switchgrass, but this is still in the testing phase.
Greenhouse gases and environmental pollution are other big problems linked to the use of fossil fuel gas and diesel used in vehicles or heating systems. Here bioethanol also has a big benefit. It reduces the amount of damaging greenhouse gases that the vehicle emissions contain. There is also less pollution and bioethanol fuels also degrade quickly and completely. This means that if it ends up on the land or water it will completely degrade and leave behind no traces that could ruin an ecosystem, something that has often happened if fossil fuel based gas or diesel spills or leaks out.
An engine that uses bioethanol actually needs around fifty percent more of the fuel than a standard fossil fuel combusting engine. This is first seen as a negative aspect, but once again bioethanol prevails. Even though more is burned, the bioethanol engines have increased power and get more distance for the amount which means they are more fuel efficient. Basically, a larger tank is required for bioethanol fuel but you will still get more mileage per gallon and will waste less energy overall.
The idea of an alternative method of a renewable energy source is the constant debate of world leaders to date. Facing damaging consequences to the earth’s normal atmospheric status, the drive to develop a cleaner more infinite form of energy is the most widely discussed issue.
While understanding the mechanisms of wave power technology, this discussion toys with the question of if wave power is cost effective. Some world economist believe no cost should be spared to preserve the earth’s vitality while others feel a more economical approached should be measured when determining the method of renewable power.
So at what cost should the world spare to make this energy concept a reality? Energy conservationists ponder this hindering question on a daily basis and the world’s economy is the deciding factor to technological advancements and keeps the development of certain renewable energy projects at bay.
There are 4 main components to which decide the economies ability to withstand a large cost for the betterment of a greater good. In other words will the cost to reproduce water power generators out weigh the overall good that will come from its production?
World economist work on financial structures to help calculate this formula and weigh in the four components to reach an overall cost efficiency for a specific project; such as the global cost for wave generator construction, the overhead for operation, the cost to perform routine maintenance and repair on faulty or damaged generators and the ability to provide wave generated power at a low enough rate to the consumer which is competitive but will not under seed the cost to operate.
The cost to construct wave generators can reach well in the hundreds of billions of dollars; from the cost of materials to the architectural designing as well as the man power to build these operational facilities thus generating an even greater strain on an already over drawn economy.
Furthermore the cost to effectively operate these wave generators with the appropriate man power and/or automated systems to monitor the daily functions, can also reach astronomical figures. These two factors combined with an agreeable rate of service, makes the determination of whether wave power will be cost effective.
Because the development of this new age renewable power source is still evolving at a slow rate, placing its potential for public consumption years behind solar and wind powered devices, it may take years before wave power energy resources will become fully developed and operational for use by the entire world.
Until technology can catch up the concept of wave powered energy, the question of “Is wave power cost effective still remains the on going topic for renewable energy sources and currently unanswered.
In order to understand wave power technology, you must first understand the power it requires to produce a single wave. To put it simply, waves are the combination of airstream’s and solar influences that produce an effect on the oceans surface. This effect propels the oceans current to make the water surface actively buckle causing a wave. Waves travel at a rate per kilometer and increases during seasonal transitions. Typically wave rates are at their highest during the winter, particularly during storms.
Scientists have revealed methods of harnessing the power of waves to generate a renewable source of electrical energy. The methods of capturing this power is through wave powered generators. There are three forms of wave power generators Air columns, Hinge or Axis rafts and Hydraulic Devices. These main types of generators can either be shoreline based or free floating and each have their own uniquely designed source of producing and infinite amount of electrical power. All three forms are more commonly employed in the South western regions where the wave potentials are greater.
Air columns also referred to as oscillating water systems are shoreline based generators which are partially submerge under the oceans surface. This generator uses empty shafts to compress or decompress air flow. This air flow is produced by the surge of water under the tubes, which cause air to become trapped within the air columns and thereby causing the trapped air to propel turbines which in turn generates electricity.
Hinge or Axis rafts also known as buoyant mooring devices are more commonly designed as free floating anchored generators. This electrical generating system relies on the resistance and surrender concept, in which a portion of the generator is allowed to move with the flow of waves while the anchored portion of the generator must remain still. The effects of the two operating systems cause friction and thereby creating electrical currents.
A hydraulic or gyroscopic system is found primarily under the waters surface and performs at a deeper depth than the other generators. Although this system functions much like the resistance and surrender concept; it principal role is based upon more resistance that uses the movement of the waves to set in motion fluid within the hydraulic pumps to make electricity.
Although these systems my sound simple, the mechanisms of production for these generators are currently up for debate. While the concept of wave power technology can produce an unlimited supply of renewable energy, the problem for mass production is the cost forecast for future development in a variety of ocean and wave conditions. While the devices currently in use have proven the probability of the systems endurance to harsh ocean conditions, the prediction to produce wave generators has become increasingly difficult since their economical goal is to maintain a low overhead, maintenance and operational cost as well as not to effect the consuming population financially, which will one day rely on its electricity producing capabilities.
According to the House of Legislation reports comprise from studies conducted by the Department of Business and Economic Development. These reports reveal a short list of advantages to wave power as a form of a renewable energy source.
The consensus is the general however widely agreed upon globally that wave power energy is the latest technique in energy conservation, and Wave Energy conversion systems or WECS have become the newest introduction to renewable power sources. While studies are still confined to specific regions of the globe; predominately areas where the wave potentials are much higher, the development of this power is still underway and has not reach its marketable prospective.
World leaders agree the need for a more economical structured renewable system is greatly desired yet fact still remains the cons currently out weigh the pro’s for wave power technology.
The abundance of wave power is without question one of the highest levels of infinite renewable sources. For over 200 years scientist have worked on innovative mechanisms to exploit the power of the ocean for the development of continual sources of energy. For that reason the implications for the potential of WECS as a source of renewable natural energy are immense. Not to mention the cost per wattage can be greatly reduced through the commercial use of the WECS and converters.
Scientist are optimistic that once the full scope and development plans are under way, electricity could cost penny’s on the dollar, approximating an average cost of lower than .05 cent per watt usage.
With the introduction to wave power energy the development of an assortment of wave power systems is considered an advantage to the commercial usage of the WECS. These electrical converters have the potential to generate electricity in a variety of ways, from compression and decompression methods to include friction emission as well as hydraulically powered forms will soon open the gate way for a more cost effective mechanisms for future public use.
Since WECS or wave power generators have the diversity of sustaining either a on or off shore location, this enhances the probability of the success of wave power energy. Furthermore the free floating and submersible version that are anchored to the oceans floor can provide greater electrical emission and the potential to capture this energy is improved.
Although the WECS is under great scrutiny for the multiple disadvantages as well as the uncompleted stages of development, legislator’s and economist alike will soon to come to an agreement, which will enable commercial development and usage of this energy source. Couple with the understanding that having a variety of renewable energy sources much like Solar and conventional wind powered mechanisms, the advantages of wave power potential will eventually out-weigh the disadvantages.
The wave power industry is truly a remarkable source of infinite renewable power. And while its concept is driven by the tremendous advantages of its technology, the WECS industry must confront a number of relevant challenges. The challenges that confront wave power must first be addressed and solutions provided in order to make available a more competent mechanism. These tasks must be accomplished before wave power technology will be recognized as an effective source of renewable energy.
Many of the challenges surrounding wave powered energy focuses on the cost to develop and facilitate global resources. The primary goal is to construct a system which will reduce the cost of development and increase the availability at the lowest amount feasible. Additional factors such as the efficiently of the electrical converter system to include the levels of improvement coupled with mapping ideal location to facilitate wave powered generators has become additional issues that need to be addressed in efforts to combat the challenges the wave power systems will face.
The primary focus which surrounds the economical factors as it relate to the cost in the development of wave power generators is the biggest challenge this system faces. Understanding the materials needed to supply power, requires a system which is cost effective and will be the first challenge WECS will have to surmount. Once an effective cost can be agreed-upon the global construction of wave powered electrical converters can be strategically placed throughout ocean locations.
But before construction can begin, legislators and other Ecological specialist must categorize prime locations for the electro-converters. Since prime marine locations are determined by the highest velocity of wave production, facility determination will have to include provisions for marine locations that do not meet the wave production requirements. This issue will hinder production in areas of low wave production and may cost more to administer electrical services in these specific regions. Plus developers will have to manage systematic problems as they relate to connecting to pre-established utilities grids.
To effectively procure viable wave powered locations, scientist must conduct studies to determine the long term effect cause on oceanic life forms and the development of the oceans ecosystem. There are few studies that direct attention to these specific effects and/or if any effects will be present through the usage of a wave power system. Not to mention studies must also show how these water generators will withstand the variances in ocean conditions throughout seasonal transitions.
Because the development of WECS is so new, very little research has been conducted along with minimal viable case studied information gather over a period of time, therefore it is hard to determine just how effective WECS will be for future commercial use. Wave power energy will go through a variety of transitions and face hurdles before it is deemed a global renewable source of energy.
In the modern world, we have seen a shift from traditional method of generating power to a more contemporary one. And the one that is the center of attention these days is the tidal power. Favorite amongst the scientist, this energy source is really making its presence felt in the world of energy source and power generation. No doubt, it comes with a lot of advantages but distance drums always sound well and this is also the case with the tidal power, as with advantages it also has a lot of disadvantages.
The following are some of the disadvantages of tidal power that should be looked upon with utmost care.
- Tidal power is not all cost effective as it seems to be in the first place compared to natural gas and coal plants generating power. More so, the power stations in turn also add up to the carbon content of the atmosphere as fossil fuel is needed to run these power stations. Besides, wild life is displaced from their regular habitat.
- Tidal power cannot be generated inland and can be used where there is appropriate wave motion or tidal flow. It can only produce electricity when there is a tidal surge, not every time.
- Barrage system of tidal power generation requires a lot of maintenance and salt resistant parts. These barrages disrupt fish migration and at the same time kill some of them while they try to pass through the turbine frames. Besides, they disrupt the movement of ships through channels on which barrage is built.
- Tidal power is limited, as the tide never slows down or speeds up and at the same time occurs in cycles of 6 hours. Besides, tidal power is also dependent on fetch distance and hardly any suitable fetch distance is available and wherever available, the cost rises to almost 1.2 billion in setting up the facility.
- Technology is yet not developed fully and hence construction of efficient, cheap and strong conversion device is a bit problematic.
- Location is also one of the major problems as appropriate tides are not found everywhere. More so, tides are dispersing energy sources, lopsided and irregular in size, durability and distance.
Fossil fuels can be produced anywhere, but as mentioned above tidal power is locale specific and needs to be transformed to something different to be transported.
The above points are quite a testimonial to the fact that, there are a number of disadvantages to tidal power. No doubt, until and unless some techniques are developed to get rid of all the problems and cost factors associated with it, it may not be as cost effective to make it viable as a usable source of energy. However, the time is not far when the technologies would be developed and we would be able to come up with a better answer and solutions to all the problems.
Tidal power or tidal energy is one of the important conventional sources of energy. It is produced from the energy of the tides which is converted into electricity. At present we are not able utilize it for maximum benefits but in near future, tidal power will be one of the important source of electricity generation. Besides, we can predict tides more easily than solar power or wind energy. Not only was that, from very ancient times tide mills used in Europe and Atlantic coast of USA. The earliest being during middle Ages or even Roman times.
Tidal power generation
Tidal power is generated from the tides which are produced due to the relative motion of the earth and moon and to a very small extent due to the Earth-Sun system. This is the only source of energy which is generated from the motions of the earth and moon. Other sources of energy like fossil fuels, bio-fuels, solar power, and wind power, wave power and hydroelectric originate from Sun either directly or indirectly.
For the generation of the Tidal energy gravitational forces play the major role. Gravitational attraction of the Sun and the Moon are responsible for the rise and fall of the water levels and the production of the tidal currents. The level of the tide at any location depends upon
The change in the position of the Sun and the Moon relative to the Earth
Effects of the rotation of the earth and
The shape of the coastlines and sea floors
- Tidal power is classified as:
Tidal stream system which uses the kinetic energy of the flowing water to supply power to the turbines. The method is popular because of its cost effectiveness and lower ecological impacts.
Barrages which uses the potential energy of the difference in the head between low and high tides. Barrages are basically dams which are built across a tidal estuary. They are not that much popular because of the high infrastructure cost and environmental issues.Tidal lagoons which are very much similar to the barrages and cost less. Besides, they can be configured so that they can generate continuously.
To produce energy using tidal power, a tidal energy generator is used. Higher the height of the water levels or stronger the tidal current velocities, greater will be the tidal power generation.
Tidal movement causes the Earth-Moon system to loose energy continuously. This happens because of the water being pumped up around the coastlines due to the natural restrictions and because of the viscous dissipation in turbulence and at the sea bed.
Tidal energy is inexhaustible and can be regarded as a great renewable energy source.
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