Renewable Clean Energy Info

Archive for July, 2008

The global price of natural oil had toppled the mythical $100/ barrel quite some time ago. Last month it reached a new high of $113/barrel. This is enough to demonstrate the extent of fossil fuel scarcity that is staring the world on its face. The need to tap inexhaustible energy resources had never been more exigent. Since their natural inventories are relatively unlimited, wind, solar and hydro energy avenues can provide a far better alternative to their non renewable fossil fuel cousins.

SOLAR STRATEGIES:
If we could only trap the immense solar potential and channelize it into meeting our energy demands, it could fix a host of our energy shortages. Solar space heating, solar water heating and solar pool heating, are some of the best applications that solar energy be put to. All of this precious energy is green and clean. Due to the exponential progress that technological innovation has registered in the last few decades, we now have access to revolutionary devices like photovoltaic panels. This unique system stores the photons and uses it to generate electricity that can be efficiently used to light up our homes.

THE WATER WAY:
This renewable resource is available in ample quantities everywhere. The procedure of hydro energy conversion to operational forms is known as hydro electric. The water accumulated in the dam is diverted through a constricted notch and the targeted jet of fluid hits the turbine wheels at a stupendous force. This rotates the turbines and furnishes electricity which is later transmitted across United States. About a tenth of our energy demands are met in terms of hydro power.

The Windy Solution:
Tapping wind energy is not new. It dates back to the era of our primitive ancestors. In fact the wind mill was first operationalised as early as in 7th century B.C. by the Persians. Later on, sailors and farmers perfected this art of windmill making further. While the former utilized the air currents to navigate their ships, the later engaged its latency to hoist the water out off low-lying water shafts. The Dutch especially were adroit in this aspect of wind power applications. The dawn of the 19th century saw the windmill undergo a sea of change. It slowly began to be slated as an equal to other renewable energy sources like solar and hydro power. In the present context the windmill usage is on an overdrive and you can take your pick from the inexpensive residential schemes to their grander industrial versions which are meant for extensive energy creation.

However, setting up a hydro electric dam isn’t exactly a practical solution at the household level, is it? Well, no need to go that far. Look about yourself and chances are that you will discover plenty of DIY (do it yourself) catalogues that provide thorough instruction listings on how to put together a solar or wind energy harnessing arrangement. Not only will this curb your energy bills but you can also reap significant gains by transacting back any excess production with commercial power organizations.
Rome was not built in a day! Neither are you required to switch over to alternative energy options overnight. Best practice is to begin with experimentations on solar and wind options and then make steady progress.

It seems like the efforts to find the best alternative energy sources are seriously being looked into by lots of countries including most US cities. One proof is the signing of the Kyoto Treaty. The main aim of the concerned group and individuals is to lessen the greenhouse gases and pollutants.

The renewable energy sources have proven to be of great help in reducing the quantity of toxins, which are by-products of the use of energy. These sources also preserve most of the natural resources that people use as resources of energy. What are the most popular sources of renewable energy? Here’s a list to give you some basic understanding about the matter.

1. Solar. This works when the sun’s rays are trapped into solar cells. The process turns the heat coming from the sun into electricity. When the sun’s rays hit solar thermal panels, the power is then converted to heat air or water. The sun’s rays can also hit parabolic mirrors. This process can produce steam by heating the water. But you don’t need all these scientific processes to be able to benefit from solar power. All you have to do is open the windows and blinds on your room to let the sunshine in. You’ll get an instant heater without having to go to any processes that will require conversion of this energy source.

To date, the main disadvantage of using this source is that it is limited. You cannot use it obviously on nighttime and during days when it is raining or even on cloudy days. This has been acted upon through solar power stations. But these are too expensive that there aren’t so many of such piece around the globe.

2. Wind. The energy coming from the wind boosts the blades of the wind turbines. As this happens, electricity is produced through the use of electrical generator. In the old days, windmills are created so that mechanical machinery could perform physical labor. This includes the pumping of water and crushing of grains that are essential in planting and farming.

Now there are large scale wind farms that produce electrical currents. The end products are then distributed to national electrical grids and small turbines owned by individuals to distribute electricity to far flung areas and homes. There are many advantages of this kind of power. The main one, of course, is that this doesn’t produce any by-products that can be harmful to the environment. And we will never run out of this source of renewable energy.

3. Geothermal. This comes from the bottom of the earth. Holes are being drilled in certain regions. The hot rocks that can be found underneath produce steam. This is being purified to be used to be able to drive turbines. The latter then become power source for electric generators.

To secure that no harmful by-products are going to be produced in the process, geothermal plants must be created accordingly. Once this has been set up, this will be self-sufficient in creating energy sources.

4. Hydroelectric. This power is being created through dams that contain water that can drive generator and water turbine. Tidal power can also be used if dam is not available. The idea here is to make use of the kinetic energy of water.

Just by reading through the available alternative energy sources, you will be amazed at how nature works wonders. It is your responsibility to care for everything around you as to be able to gain from the benefits that each source of energy can give you.

It seems like the efforts to find the best alternative energy sources are seriously being looked into by lots of countries including most US cities. One proof is the signing of the Kyoto Treaty. The main aim of the concerned group and individuals is to lessen the greenhouse gases and pollutants.

The renewable energy sources have proven to be of great help in reducing the quantity of toxins, which are by-products of the use of energy. These sources also preserve most of the natural resources that people use as resources of energy. What are the most popular sources of renewable energy? Here’s a list to give you some basic understanding about the matter.

1. Solar. This works when the sun’s rays are trapped into solar cells. The process turns the heat coming from the sun into electricity. When the sun’s rays hit solar thermal panels, the power is then converted to heat air or water. The sun’s rays can also hit parabolic mirrors. This process can produce steam by heating the water. But you don’t need all these scientific processes to be able to benefit from solar power. All you have to do is open the windows and blinds on your room to let the sunshine in. You’ll get an instant heater without having to go to any processes that will require conversion of this energy source.

To date, the main disadvantage of using this source is that it is limited. You cannot use it obviously on nighttime and during days when it is raining or even on cloudy days. This has been acted upon through solar power stations. But these are too expensive that there aren’t so many of such piece around the globe.

2. Wind. The energy coming from the wind boosts the blades of the wind turbines. As this happens, electricity is produced through the use of electrical generator. In the old days, windmills are created so that mechanical machinery could perform physical labor. This includes the pumping of water and crushing of grains that are essential in planting and farming.

Now there are large scale wind farms that produce electrical currents. The end products are then distributed to national electrical grids and small turbines owned by individuals to distribute electricity to far flung areas and homes. There are many advantages of this kind of power. The main one, of course, is that this doesn’t produce any by-products that can be harmful to the environment. And we will never run out of this source of renewable energy.

3. Geothermal. This comes from the bottom of the earth. Holes are being drilled in certain regions. The hot rocks that can be found underneath produce steam. This is being purified to be used to be able to drive turbines. The latter then become power source for electric generators.

To secure that no harmful by-products are going to be produced in the process, geothermal plants must be created accordingly. Once this has been set up, this will be self-sufficient in creating energy sources.

4. Hydroelectric. This power is being created through dams that contain water that can drive generator and water turbine. Tidal power can also be used if dam is not available. The idea here is to make use of the kinetic energy of water.

Just by reading through the available alternative energy sources, you will be amazed at how nature works wonders. It is your responsibility to care for everything around you as to be able to gain from the benefits that each source of energy can give you.

Due to increasing global energy consumption and the probable depletion of the world’s non-renewable energy source, ways of exploring and using alternative energy sources are being undertaken. Using alternative energy source can be both beneficial and difficult. Let us explore the different pros and cons of alternative energy source.

A major advantage of renewable energy is that it is renewable therefore it is sustainable and will never run out. More importantly renewable energy produces little or no waste products that may pollute or has harmful effects on the environment.

Some countries using renewable energy as another source of energy are also showing some economic benefits especially in many regional areas. Most of their projects are located away from the urban centers and capital cities. They were able to increase the use of local services as well as tourism.

General disadvantage of using renewable energy is that it is difficult to generate large quantities of electricity similar to that of conventional fossil fuels. Another common problem among alternative energy sources is the reliability of the energy supply. Since it is naturally generated, renewable energy supply relies on the weather condition.

Another drawback or disadvantage of alternative energy source is that it is relatively more expensive to set up the equipment necessary for generating the energy.

Here are the several advantages and disadvantages of alternative energy source.

• Solar energy- the sun is a great source of energy since it is free and is efficient. It is possible to maximize the energy given by the sun to replace traditional electricity. But there are limitations, like areas at high latitude and places with frequent rains are places not capable of producing efficient solar energy.

• Wind energy- wind is also an efficient electricity source. It is possible that wind energy can replace up to 20 percent of the total electric consumption in the future. It is also a very environment friendly source of energy since there are no harmful gases produced in the process of converting the energy. Location is a very important factor in using wind energy, high latitudes and coast lines are good places to set up windmills. A relatively big land area is also needed to put up sufficient number of windmills.

• Hydroelectric and tidal energy- both of these energy come from water. With hydroelectric energy it is mainly sourced from dams. Tidal energy, on the other hand, uses the natural tides of the ocean. Production of energy from water is another clean way of producing energy. However there are several disadvantages. Putting up river dams as sources of hydroelectric energy is very expensive, while tidal energy source depends much on the ocean. Since oceans tends to unpredictable there are only 9 places worldwide that are suitable for this kind of energy source. And tidal energy power plants are also said to provide negative effects on the migratory birds and the fishes.

• Biomass- biomass consists of fermented animal waste, agricultural crops, grains and other natural products. It can be used to produce an alcohol and also replace gasoline needs. It maximizes waste materials as an alternative energy source. A drawback, it that it still produces greenhouse gas.

Alternative energy sources although it is renewable also pose some disadvantages. But its unfavourable effects are relatively smaller than the harmful effects of conventional fossil fuels. The hunt for a cost-efficient and environmental friendly alternative energy source does not stop on the latest discovery.

I was first introduced to solar energy in the movie, Race the Sun with James Belushi and Halley Berry in the lead. It was a story about low- income and under achieving Hawaiian students encouraged by their teacher to join the Solar Car race. In the movie, a car shaped like a cockroach and covered with solar panels used the sun’s rays as an alternative energy source to run the car.

Solar energy is the light and the heat from the sun. Solar energy is free and its supplies are unlimited. There are n air and water pollution caused about by using solar energy. But there is still some impacts on the environment although indirect.

Photovoltaic cells used to convert sunlight into electricity uses silicon and also produce some waste materials. There are also large solar thermal farms and these farms can also be harmful to the environment and desert ecosystems if not properly managed.

Solar energy can be used on different aspects. Solar energy can be used in agriculture. Greenhouses (which is entirely different from greenhouse gas) convert solar light to heat to be maximized in enhancing the growth of plants and crops. Greenhouses has been around since the Roman times and modern greenhouses were built in Europe in 16th century. Greenhouses are still an important part of horticulture nowadays,

Daylight systems are also being used to maximize the energy released by the sun. It is used to provide interior illumination replacing the artificial lighting. Daylight systems include sawtooth roofs, light shelf, skylights, and light tube. Daylight systems when they are properly implemented can reduce lighting-related energy consumption by 25 percent.

Solar energy can also be developed into solar thermal technologies which can be used for water heating, space heating, space cooling and process heat generation. Solar energy can also be used to distil water and make saline or brackish water potable or drinkable.

The solar water disinfection or SODIS involves exposing water-filled plastic polyethylene terephthalate or PET bottles. This process takes a long time, since the exposure time varies on the weather conditions. It requires a minimum of six hours to two days during days with overcast conditions. Currently, there are two million people in developing centuries use SODIS for their daily drinking water needs.

Also sunlight can be converted into electricity using photovoltaics or PV. PV has been mainly used to power small and medium-sized things like a calculator powered by a single solar cell. There are homes powered by photovoltaics. Using solar energy for water and space heating is the most widely use application of solar energy. While ventilation and solar air heating is also growing in popularity.

There are three main ways in using solar energy. The main way of using and converting solar energy is by using the solar cells. Solar cells convert light directly into electricity. Solar cells are also called photovoltaic or photoelectric cells.

Meanwhile, solar furnaces use a huge array of mirrors to concentrate on the Sun’s energy into a small space and produced very high temperatures. Solar furnaces are also called “solar cookers”. A solar cooker can be used in hot countries to cook food.

With all the benefits if using solar energy, there is still a downside for this alternative energy source. It does not work during night time. The cost of setting up solar stations is expensive, but the benefit of using solar energy when accumulated is so much more.

The world is gradually marching towards a severe energy crisis, what with an ever-increasing demand of energy overstepping its supply. We have always known that the energy we use everyday is not unlimited, yet we take it for granted. Oil, gas, power, even water has limited availability. Yet, we have not taken enough precautions to deal with a possible energy crisis. When I say ‘we’, I am not referring to the governments but to all of us, the common people.

Oil and gas have already become too expensive, and with each passing day, they are moving towards being extinct. Some ignorant people think that energy crisis is a myth. They fail to see the big picture. Prices have been rapidly increasing for the last five years, thanks to the ever-increasing demand and the increasing shortage of energy resources.

How soon will it be all gone?
Are the cynics right in saying that we are making a mountain of a molehill, or is the energy crisis for real? Picture this: We have already exhausted 50 percent of the available oil. At the current rate of consumption, the rest of the oil will finish in 32 years! Imagine if the rate of consumption increases! We all know it is bound to increase. So, even the present generation will face an acute energy crisis in the later years, let alone future generations.

What are we doing about it?
Are we equipped to face the impending energy crisis? What can you and I do to tackle it? For starters, we need to understand the importance of energy in our lives and stop taking it for granted. We have to minimize the use of oil, gas, electricity, or any other fuel. We cannot afford to waste any available energy. It is also important to spread awareness about limited availability of energy resources. Simple things like joining a car pool, switching off car engines at traffic lights, and minimizing the use of gas and oil in everyday activities will help a long way in crisis-readiness.

What are the alternate energy options?
As a responsible world citizen, start looking for alternate energy solutions like solar energy and wind energy. Employing these alternate power solutions is extremely feasible and cost-effective. You will not only cut down your power bills but also contribute to a better future of the world.

The shortage of power, the rapid consumption of non-renewable energy, the ever-increasing demand for power supply, the daily warnings about our environment are enough signs to tell us that it’s time we do something. So, what can we do? For starters, how about living off the grid? If I have startled you with that proposition, let me tell you that living off the grid not only helps the environment and helps save power; it also cuts down our electricity bill substantially. Now, that’s a tangible benefit apart from all the good you will do to the world. Trust me, you will feel good doing this.

Let us first study the advantages of living off the grid.

• Reduced dependability on exhausting resources: Who wants to depend on public utilities all the time? Living off the grid helps you rely only on your resources and not the ones supplied by governments or corporations. How often have you cursed when faced with a power outage in the midst of some important work or a party? Wouldn’t you like to take charge of such factors affecting you life? With alternate power solutions, you can.

• Freedom of usage of naturally available resources: How would you feel when you don’t have to pay for the power you use? Wouldn’t it be delightful to use as much power as you want without worrying about the electricity meter? You can make use of the abundant power available in the nature to light up your home and make your food. The solar power solutions and the wind power solutions are the answers to your power quest (well, literally!).

• Reduced power costs, helping save your money: How would you feel if the electricity bills stop coming in your letter box? The alternate power solutions give you a return on investment very soon, thus making the power supply to your home eventually free!

• Making way for a healthier environment: Don’t you bless the people who planted trees years ago not expecting them to miraculously grow? They planted those trees for the future generations. Make the future of your future generations secure by giving them a greener, healthier world. Cut down on the usage of non-renewable sources of energy. Try to use water minimally. There is not much drinking water left for the next generations.

If you are thinking it is not very feasible to live off the grid, look for alternate power solutions and you will be surprised to learn that they are not only cost-effective but also extremely feasible.

As the term suggests, bio-fuels are fuels that are formed when biological matter decomposes. The bio-fuels are mostly derived from plants. Bio-fuels exist in all the three states of matter: solid, liquid, and gas.

Difference between bio-fuels and fossil fuels
Bio-fuels are different from fossil fuels in the following ways:
• Fossil fuels take a million years to build whereas bio-fuels can be made extremely fast, in a matter of days.
• Fossil fuels generate huge amounts of pollution. Bio-fuels are comparatively safer.
• Bio-fuels are renewable sources of energy unlike fossil fuels.

Different types of bio-fuels
Bio-fuels have been categorized into four types: first generation, second generation, third generation, and fourth generation.

The first generation bio-fuels are derived from vegetable fats, starch, and sugar, which are in turn derived from food-crops. The first generation fuels are also derived from animal fats. Biogas, bio-diesel, and vegetable oil are some examples of this type of bio-fuels.

The second generation of bio-fuels is mainly derived from waste biomass, thus making it a more balanced option compared to the first-generation bio-fuels. Different kinds of alcohols and diesel generated from wood fall into the category of second generation bio-fuels.

The third generation comprises of bio-fuels derived from algae. Algae are farmed on large scales for creating these bio-fuels. The algae fuels are extremely environment-friendly as they can easily decompose into the soil without harming it.

The bio-fuels in the fourth generation are derived by a method in which micro-organisms are raised to work with carbon dioxide to generate fuel.

Advantages of bio-fuels
Bio-fuels prove advantageous in the following ways:
• Bio-fuels lessen the burden on gradually-vanishing fossil fuels.
• Bio-fuels are environment-friendly. They help reduce carbon emissions into the atmosphere.
• Bio-fuels, especially, bio-diesel prove to be very cost-effective for consumers.

Disadvantages of bio-fuels
Bio-fuels are not bereft of criticism. Though beneficial for the environment, bio-fuels have its disadvantages, paradoxically in the environmental purview. Bio-fuels have received criticism for many reasons, a couple of which are stated below:
• Economists have long debated on the usefulness of first generation bio-fuels when compared to the lack of food they cause. Generating fuel from food crops makes food crops unworthy of human consumption. Some people believe that being a higher priority than fuel, food should not be farmed for making fuels but for human consumption.
• Making bio-fuels require acres of farming land, thus encroaching upon the natural habitat of plants and animals.