January 23rd, 2011 at 8:48 am
Renewable intensity is not a imaginative concept. While it may appear to be a less in fashion issue of chat in certain circles, renewable force initiatives possess been with us since the dawn of man. There is some debate there the accepted definition of renewable determination, but it can be loosely defined as a form of vitality that is essentially inexhaustible. Furthermore, the resource is continually replenished by diverse reasonable processes identifiable in the logical world.
One key credit to impel when discussing the concept of renewable drive is that of sustainability. Everyone could make the argument that, in the extended period of time, fossil fuels are a renewable determination resource. While the common sense stands on its own, this is a failed notion. The inside variation between fossil fuels and other forms of renewable determination is that fossil fuels are being depleted at a tariff faster than they can be replenished. Exchange for this judgement, fossil fuels cannot be considered sincerely renewable. They are absolutely not sustainable, due to the accelerated reprove of consumption.
Some of the more stylish renewable zip resources subsume sunshine, inundate, and wind. Solar drive refers to the energy that is at ease from sunlight. This form of verve is captured using a photovoltaic array, more commonly known as a solar panel. The solar emission is captured during the photovoltaic array and converted to aim current (DC) electricity. From there, the direct current excitement ought to be converted to alternating known (AC) benefit of utilize in most applications. The converted tenseness is then stored in a battery due to the fact that use at a later date.
There are also heterogeneous forms of energy that breathe in water. The same of the most commonly acknowledged is that of hydroelectric energy, but there are a compute of others including tidal power and davy jones’s locker thermal ‚lan conversion. Hydroelectric might mostly employs the take of a dam, wherein the determination of the soda water flow is captured and acclimatized to power a turbine. The turbine then generates a supplementary fashion of electricity. Tidal power attempts to pressure inject of the natural energy developing of tidal activity in the oceans and seas. In spartan terms, the lavish tide is captured and fed auspices of a turbine to create electricity. The briny thermal strength conversion attempts to use the variances in water temperature, from the warmer to all appearances sprinkle to the cooler deep the highest, resulting in a cyclic tenseness engine.
Wind power is a person of the oldest accepted forms of renewable energy. It has been occupied for centuries as a roots of power, dating pursuing to the making of the sailboat. The innate latent of conclude power was realized a host of years later in the form of a draught mill. In this exemplification, the kinetic might of wind is reach-me-down to drive a turbine which, in rebuff, generates electricity. Flatulence spirit possesses staggering hidden after sustainable verve times, and a number of large-scale development projects are currently underway from one end to the other the world.
One of the greatest challenges coating generosity is to behold a scheme to shorten our faith on unsustainable resources, like fossil fuels examples of a definition essay. Most, if not all, fresh industrial societies rely far too greatly on fossil fuels and increasingly, this is appropriate an undeniable reality. Wars of mastery are being waged to protected what is left side of the out of sight’s fuel reserves. If only the resources of the intense nations were channeled into developing sustainable get-up-and-go alternatives, as opposed to driving a clash shape abnormal on dominating the fuel markets. Our fresh way of zing is thriving to undergo some abstruse times in the very near to be to come, if this actuality continues to be ignored. Ask yourself what you can do to net a difference. You effectiveness be surprised at what you can accomplish.
The most exact definition of Solar Energy is plainly &ndash “the energy from the sun”. It is a term used to classify the electromagnetic radiation emitted by the sun and intercepted by the Earth. It is the world’s most permanent and reliable source of energy and the most copious.
The uses of solar energy on earth include solar heating for buildings, solar heat for manufacturing or industry and electricity production. So what is solar energy? How does it affect us?
Solar energy is responsible for weather systems and ocean currents. It provides light, heat, and energy to all living things on Earth. It has many uses. It supplies electricity; it can be used to power cars.
Solar energy is also used as a power for satellites in space and in space shuttles. It could also power boats, generators during emergencies, toys, and even security systems.
The amount of solar energy that the earth receives is about 770 trillion kilowatts (kW), an amount 5,000 times bigger than the sum of all other energy, may it be terrestrial nuclear energy, geothermal energy or gravitational energy.
There are two types of solar energy. These are:
1. Thermal Energy
2. Electric Energy
What is the difference between the two types energy?
Thermal energy is kinetic energy. It is everywhere. It makes the earth hot and even heats up our homes. It helps us to dry our clothes. It is used as well to heat up water for household use or even pools. That is why thermal energy is called the heat energy because it is stored in the center of the earth as well.
Electric energy is widely known to us as the electricity. It is an essential part of nature and it is one of our most widely used forms of energy. This uses sunlight to power ordinary electrical equipment, such as household appliances, computers, and lighting.
Most applications of solar energy depend on systems including collectors, storage and controls. Storage is needed for a reason that solar energy is only available at daylight hours, but the demand for energy is needed both day and night. Controls are used to guarantee that the storage system works safely and efficiently.
The accessibility of solar energy is determined by three factors:
• The location is usually measured by latitude, longitude and altitude.
• The time.
• The weather.
Aside from knowing that solar energy is a free energy still, you have to realize that it also has advantages and disadvantages.
The advantages are:
• Solar energy is almost limitless; it will be available for as long as there are still humans in the earth.
• It is abundant. You will not worry of running out of it.
• It could provide more power than all known fossil fuel reserves.
• Solar energy is available during the day when electricity usage is really important.
• It is the most inexhaustible, renewable source of energy known to man.
• Solar energy can be absorbed, reflected, transmitted, and insulated.
• It can be collected and stored in batteries.
The disadvantages are:
• It is not suitable in cloudy areas.
• It is not available at night time.
• And it may require large land areas.
As a reminder, solar energy levels are lesser the farther north the site. Considering geography, season is an important determinant of solar energy levels because the Sun’s position and the weather vary greatly from summer to winter.
Renewable energy is not a new concept. While it may appear to be a rather fashionable topic of conversation in certain circles, renewable energy initiatives have been with us since the dawn of man. There is some debate about the accepted definition of renewable energy, but it can be loosely defined as a form of energy that is essentially inexhaustible. Furthermore, the resource is continually replenished by various natural processes identifiable in the natural world.
One key distinction to make when discussing the concept of renewable energy is that of sustainability. One could make the argument that, in the long term, fossil fuels are a renewable energy resource. While the logic stands on its own, this is a failed notion. The central difference between fossil fuels and other forms of renewable energy is that fossil fuels are being depleted at a rate faster than they can be replenished. For this reason, fossil fuels cannot be considered truly renewable. They are simply not sustainable, due to the accelerated rate of consumption.
Some of the more popular renewable energy resources include sunshine, water, and wind. Solar energy refers to the energy that is collected from sunlight. This form of energy is captured using a photovoltaic array, more commonly known as a solar panel. The solar radiation is captured by the photovoltaic array and converted to direct current (DC) electricity. From there, the direct current electricity must be converted to alternating current (AC) for use in most applications. The converted electricity is then stored in a battery for use at a later date.
There are also various forms of energy that exist in water. One of the most commonly acknowledged is that of hydroelectric energy, but there are a number of others including tidal power and ocean thermal energy conversion. Hydroelectric energy generally employs the use of a dam, wherein the energy of the water flow is captured and used to power a turbine. The turbine then generates a supplementary form of electricity. Tidal power attempts to make use of the natural energy potential of tidal activity in the oceans and seas. In simple terms, the high tide is captured and fed through a turbine to generate electricity. Ocean thermal energy conversion attempts to exploit the variances in water temperature, from the warmer surface water to the cooler deep water, resulting in a cyclic heat engine.
Wind power is one of the oldest accepted forms of renewable energy. It has been used for centuries as a source of power, dating back to the creation of the sailboat. The innate potential of wind power was realized a number of years later in the form of a wind mill. In this instance, the kinetic energy of wind is used to drive a turbine which, in turn, generates electricity. Wind energy possesses immense potential for sustainable energy generation, and a number of large-scale development projects are currently underway throughout the world.
One of the greatest challenges facing humanity is to discover a way to reduce our reliance on unsustainable resources, like fossil fuels. Most, if not all, modern industrial societies rely far too greatly on fossil fuels and increasingly, this is becoming an undeniable reality. Wars of conquest are being waged to secure what is left of the world’s oil reserves. If only the resources of the powerful nations were channeled into developing sustainable energy alternatives, as opposed to driving a war machine bent on dominating the oil markets. Our modern way of life is going to undergo some difficult times in the very near future, if this reality continues to be ignored. Ask yourself what you can do to make a difference. You might be surprised at what you can accomplish.
With massive rebate programs and tax credits being issued by state and federal governments, using the sun to generate electricity is very popular. So, how does it work?
Generating electricity from the sun is all about converting sunlight into power. Importantly, the process has nothing to do with converting the heat produced by sunlight into energy. This common misconception leads to a lot of confusion regarding solar systems.
The technology behind solar systems is known as photovoltaic technology. Essentially, this technology involves using sunlight to create a chemical reaction. During the chemical reaction, electrons are released from the relevant material and collected by tiny wires. This process creates a direct current of electricity. The electricity is then converted to usable alternating current electricity and stored in a battery or fed into a utility grid system.
Solar platforms use this exact process to produce energy. The arrays are made up of small squares called photovoltaic cells. A collection of these cells forms a single panel and a collection of panels makes up a “solar array.” The size of your array is entirely dependent upon the amount of electricity you want to produce.
The photovoltaic cells in a solar array are where the action happens. The cells are typically made with crystalline silicon under a glass cover. When sunlight hits the crystalline silicon, the material reacts by kicking off electrons. Tiny wires built into the cells collect the electrons in the form of an electrical current. This current is then sent to an inverter, which converts it to usable electricity.
The biggest issue with solar platforms is how efficiently they convert sunlight into electricity. The answer depends on how much you want to spend. Top brands will convert at roughly 15 percent efficiency. Less expensive brands will convert at 5 to 10 percent efficiency. The more efficient the panels, the fewer you will need.
It has become clear that our reliance on fossil fuels is only going to lead to further problems, whether political, environmental or economic. Advancements in solar technology as well as incredible tax breaks and rebates make using the Sun as an energy source a viable solution for you.
Grameen Shakti is a renewable energy resources company based out of Bangladesh. They are a part of the Grameen family of companies, which has been working for decades to alleviate the burdens of poverty in developing countries. The Grameen Bank, one of their founding companies, has become world-renowned for their charitable work and for helping to establish groundbreaking programs focused on the needs of people.
In recent years, the Grameen Bank has financed and supported a number of projects aimed at removing social and financial barriers and creating opportunities for those less fortunate. Grameen Telecom is one such example. The central aim of this company is to provide collateral-free loans to rural villagers for use in establishing local communications networks. This model has become known as the Village Phone.
They have now committed significant resources to sustainable energy development. The cornerstone of this effort is the Photovoltaic Program. In Bangladesh, only 30% of the population is receiving energy from the electrical power grid. In this developing nation, the infrastructure to provide energy to every household simply doesn’t exist. In an effort to address this problem, Grameen Shakti has financed the installation of thousands of solar energy systems in rural communities.
This has created immense opportunities for people in rural villages. Children now have the ability to pursue their studies long after the sun has gone down. Businesses now have the ability to operate beyond their traditional work hours, thus increasing productivity and sales. A world of opportunity has opened up for an entire generation of rural villagers. As a consequence, they are no longer rural villagers. They are now members of our global village.
One of the most amazing consequences of this program has been the level of technological engagement that has occurred among the youth in Bangladesh. For young people in rural communities, the future is bright. Due to the advancement in technological knowledge and understanding, the demand for skilled workers has increased at a phenomenal pace. To address this concern, Grameen Shakti has also established training programs that educate young people in the principles of electronics and engineering.
It is both exciting and encouraging to witness the immediate and tangible effects of an enlightened business model that measures its true profitability by its social impact. It is an idea that is completely foreign to the western capitalist mindset, and one that serves as a shining example of the power of an idea. Western corporations take heed; there are lessons to be learned in rural Bangladesh.
Passive solar is a method of using the energy from the sun to heat a home. It is extremely popular because the process is free once a passive solar home is created.
Is Passive Solar A Viable Home Heating Option In Cold Areas?
Passive solar can be used to heat a home in colder areas, but you have to go into it with reasonable expectations. While the cold climate is a hurdle, the real issue is going to be the length of time the sun beats down upon your property. If your home receives only four or five hours of direct sunlight a day, forget it. You will never produce enough energy to keep the home warm for sufficient periods of time.
Passive solar design is very popular in warm to mild climates because it is more or less a free method for warming a home. The manipulation of the position of the home and placement of large windows in the south facing wall is typical strategies for dealing with the issue. Obviously, large windows in a cold climate are going to result in significant heat loss regardless of the quality with which they are built. So, what can you do?
There are two primary approaches to creating a passive solar design that works in the winter. One is the use of a large Trombe Wall and the other is the greenhouse approach. Let’s take a look.
Trombe Walls are popular in passive solar designs because they effectively convert sunlight to heat and are interesting from an aesthetic view point. Typically, a Trombe Wall is 8 to 12 feet in length on the south facing wall of a home. In significantly colder areas, the wall is going to need to be much larger, perhaps the full length of the home depending upon energy analysis and the cold weather expected. An energy audit of the home is the only to arrive at a definitive answer.
You are also going to have to incorporate a flip strategy for the heat. As the sun enters the glass plate and heats up the masonry of the wall, you risk losing vast amounts of it through the glass surface. This means you need to create an air circulation method whereby you draw the hot air into a secondary space behind the wall. This can simply be a closed off room or a space intended for the purpose. The circulation should be done on a timer similar to the solar thermostats used on solar hot water panels. The point is to keep the built up heat from escaping back into the environment.
The greenhouse approach simplifies matters. The essential idea is to build an insulated greenhouse to collect and store the heat of the sun during the day. Often called a sunspace, the greenhouse is similar to those used for plants. Even in cold climates, the sun will produce a magnificent amount of heat. Again, the problem is keeping the heat from escaping once it has built up. Since the sun has to come in through a transparent surface, you inevitably have the problem of the heat escaping through the same. The best option is to use a controlled timer to blow the air through to the house once certain temperatures are reached. It is not very efficient, but you have little choice.
An alternative to passive solar heating in very cold areas is biomass. Corn burning furnaces are popular. They are a much cheaper solution as are the corn kernels. This biomass energy is also much more reliable and, personally, it is the way I would go.