A Comparison Of Solar Power Technologies Environmental Sciences Essay

Solar energy is the coevals of energy from sunshine or the transition of sunshine to electricity. As a renewable beginning of energy, Solar energy, cheery visible radiation and heat from the Sun, has been harnessed by worlds long clip ago utilizing a scope of ever-evolving engineerings. The heat from the Sun ( solar radiation ) , along with other secondary solar-powered resources like air current and wave power, hydroelectricity and biomass, are responsible for most of the available renewable energy on earth today.http: //upload.wikimedia.org/wikipedia/commons/thumb/9/91/Moody_Sunburst.jpg/220px-Moody_Sunburst.jpg

There are many methods to bring forth electric current utilizing sunshine but the most common methods are photovoltaic and concentrated solar power. Photovoltaic contains an array of solar cells which are pressed in solar panels. These solar panels are protected and framed by a glass sheet. This sheet does non let any drosss to go through in, therefore merely sunrays can do their manner through it. These solar panels are made up of conductive stuffs such as impure Si and Cu In severally. These music directors help and back up the flow of negatrons ; hence doing the heat nowadays on the solar panels is to bring forth direct electric current. The electric current generated can non back up the electrical devices. Because of that, it is converted to alternative current ( AC ) by utilizing inverter and battery. Photovoltaic energy is turning fast and it is so far the lone quickly come oning renewable energy engineering today. Concentrating solar power systems on the other manus work on the rule of meeting the sunshine from many kilometers to individual focal point. The concentrated energy stored in this signifier is converted to thermal ( heat ) energy which is so used to back up photovoltaic. The energy stored by the Concentrating solar power ( CSP ) is besides supportive in running steam turbines.

COMPARISON OF RENEWABLE SOLAR ENERGY WITH OTHER RENEWABLE ENERGIES

Solar renewable energy has edge over all other renewable beginnings of energy. This competitory border is due to the copiousness and handiness of this natural resource. Other renewable energy beginnings such as air current, hydro, atomic, and bio fuels have many restrictions. It is an indispensable factor to sustainable energy and contributes to universe energy security, cut downing trust on dodo fuel resources, and supplying chances for extenuating nursery gases. It reduces the fluke gas emanations from fossil fuel burning, including pollutants such as sulfur dioxide, azotic oxide, C monoxide, dust, and quicksilver in the coal. Solar energy besides prevents the jeopardies of coal excavation and the indirect wellness effects of coal emanations. Compared to atomic power, solar power generates no atomic waste, has none of the dangers linked with uranium excavation, or atomic release. Furthermore, air current is either dependent on conditions or it is constrained to coastal parts. Hydropower on the other manus varies with part to part. Constructing a dike is really expensive and the high cost implies that they must run for many old ages before they can give net incomes. Besides, natural environment is destroyed when flooded and people populating in towns and small towns near to it are forced to travel out. However, Sun is everyplace and it is a free resource. Therefore, can non be stopped to go its manner to earth, because this energy beginning is non the belongings of any single. Another characteristic which makes it desirable to utilize is that it is available both in developed and under-developed states of the universe in equal strength and magnitude. As a consequence, there is no licensing and restriction to its usage. Furthermore there are no production tools or schemes required to avail this immense natural resource.

TYPES OF SOLAR ENERGY

Passive Solar Energy

Passive solar energy refers to the capturing of the Sun ‘s energy without the usage of mechanical devices. Using south-facing Windowss to supply natural lighting and heat for your place are illustrations of inactive solar energy. A Trombe wall circulates air by natural agencies and it represents itself as a thermic mass. Some Windowss, light shelves, fanlights and light tubings take in heat during the twenty-four hours and can bring forth heat at dark.

Active Solar Energy

Active solar energy uses mechanical devices such as solar panels, pumps, and fans in the aggregation, storage, and distribution of solar energy for places. These are engineerings used to change over solar energy into useable visible radiation, heat, every bit good as cause air-movement for airing or chilling, or shop heat for future usage.

ADVANTAGES OF SOLAR POWER

Hydroelectric energy offers a figure of advantages for people who use it, the environment, and electricity providers.

Solar cells provide cost effectual solutions to energy jobs in topographic points where there is no brinies electricity.

Since they do non affect or hold traveling parts they require small care and have a long life-time. Unlike other renewable beginnings they have other virtues ; air current and hydro power depend on turbines which are noisy, expensive and prone to interrupting down. They are wholly soundless.

Using this type of energy to bring forth electricity is non dependent upon the monetary value of U, oil, or other types of fuel. This makes electricity costs lower and more stable ; one of its most important advantages.

There is no pollution created during solar energy coevals. It besides does non bring forth radioactive waste or affect the environmental impact of fuel being transported to it. Hence, does non lend to planetary heating, acerb rain or smog.

Solar power Stationss can be set up in about any size, depending on the available resources ; large plenty to power a individual place, mill, little town, or big metropolis.

A Solar Energy system can work wholly on its ain, non necessitating a connexion to a power or gas grid beginning at all. Systems can hence be installed in distant locations ( like vacation log cabins ) , doing it more practical and cost-efficient than the supply of public-service corporation electricity to a new site.

The installing of solar street visible radiations can salvage utile electricity in light and can assist us to take down public-service corporation measures.

DISADVANTAGES OF SOLAR POWER

The utilizations were understood right off, but solar-powered electricity nevertheless is non without its drawbacks. The chief disadvantage of solar energy is the initial cost. Most types of solar cell necessitate big countries of land to accomplish mean efficiency. Air pollution and conditions can besides hold a large consequence on the effectivity of the cells. In add-on, the semi-conducting Si stuff used is besides really expensive and the job of night-time agencies solar cells can merely of all time bring forth during the daylight. Apparently, as fossil fuel militias run down, their cost will lift until a point is reached where solar cells become cost-efficient beginning of energy. When this happens, immense investing will be able to farther increase their efficiency and lower their cost.

USES & A ; APPLICATIONS OF SOLAR RENEWABLE ENERGY

Solar renewable energy is seen to be the most environmentally friendly for cooking intents. The rural countries where there is copiousness of sunshine and woods solar cookers have been introduced. This attack will avoid the procedure of deforestation and the fume as a consequence of firing wood. This renewable energy beginning is used to supply warming and chilling infinite installations. Furthermore, it is a safe replacement for electric visible radiations. Hence, the applications of solar energy are unlimited now solar energy. Thermal ethanediol energy is used to heat H2O. In this method ( indirect circulation ) , ethanediol is heated by the Sun ‘s beams and the heat is so transferred to H2O in a hot H2O armored combat vehicle.

This technique of roll uping the Sun ‘s energy is more practical now than of all time. In countries as far north as Edmonton, Alberta, solar thermal to heat H2O is economically sound. It can pay for itself in three old ages or less. It is used to run air current turbines, steam turbines therefore cut downing the pollution consequence. Solar energy is the safest energy beginning which has no side effects to human wellness whetherAA AA it is used to bring forth electricity or cookery nutrient. Active and solar warming procedures are both renewable energy beginnings because both work on utilizing natural resource sunshine in combination with air current Millss. hypertext transfer protocol: //assets2.originenergy.com.au/files/img_savesolar.jpg

Decision

In the competition of environmental sustainability and renewable energy engineering, I strongly promote the usage of solar power for electricity coevals. It has more advantages than some other beginnings of power coevals when compared to them. Besides, to do the Earth a healthier livable topographic point, environmental protection or sustainability should be in the head of everyone when thought of method of power coevals. However, in a universe of turning demand for clean, reliable, and low-cost energy like ours, the function of solar power and multipurpose solar substructure, which besides offers of import chances for poorness relief and sustainable development, is spread outing. As a renewable energy, it besides plays a alone double function in climate alteration ; as an version scheme for turning weather variableness and as a renewable resource to travel economic systems to a lower-carbon hereafter.

Solar power therefore, is a green energy that is environmentally friendly and is portion of the solution to planetary heating and the universe ‘s presently turning demand for energy. Sun is everyplace and is ready to get by with extremums in demand, and much more dependable than air current, hydro or dodo fuel power coevals. The cost of electricity is economically inexpensive and produces no nursery gases and hence reduces the consequence of planetary heating every bit good as meets the demands of the present universe without compromising the ability of future coevalss to run into their demands. This I suggest should be accommodated global as a agency of salvaging the universe.

The chart below shows solar energy coevals in 2001 for the taking solar energy-generating states in the universe. Japan has developed big solar power installations in the last decennary and now leads the universe in its use. But, from north to south and from east to west, states all over the universe make usage of hydroelectricity.

Besides, the graph above shows the sequence of monetary value decreases over the last 10 old ages for the cost of 4 kWp residential solar system in Japan in money of the twenty-four hours. Japan leads the universe in PV monetary values as a consequence of being the largest state market and hosting the largest PV cell fabrication companies.

It could be seen that solar power is so a good beginning of power coevals with greater end product. Hence, this should be encouraged in developing states and should be seen as an effectual method of providing power to their turning populations. Although major solar power development plans are big public works undertakings necessitating immense sums of money, most of it borrowed from the developed states. Nevertheless leaders of developing states should bear in head that, in the long tally they will pay for themselves by conveying inexpensive electric power to their people. In add-on, solar power has a many advantages that shows its usage as portion of the methods for providing electricity to an energy-demanding universe. Even with saving attempts, energy demand has been and will go on to increase. Other factors can give rise to that addition, e.g. the proposed displacement to electric autos to run into environmental air quality ends. In utilizing each and every one of these signifiers of energy production, we need to do certain we conserve every bit much as we can so we leave beginnings for future coevalss. Energy providers need to guarantee that they do non add to short and long-run environmental jobs. Governments need to guarantee energy is generated safely and that neither people nor the environment is at hazard.

In add-on, harmonizing to present literature, about two billion people in the universe have no entree to electrical energy ( World Bank, 1996 ) . The huge bulk of these unrecorded in distant rural countries in developing states, where usual grid-extension electricity supply is non economically possible, and little Diesel sets may be unsuitable due to fuel costs, absence of consistent supplies, and a general deficiency of proficient support.

The most pressing electricity demands in rural countries are associated with better lighting, better information and communicating, security for community members, and production and transmutation of merchandises particularly the transmutation of agricultural and carnal merchandises into more detailed 1s for the market, illustration cereals into spirit, milk into cheese, etc. Such demand has to be met from low supply capacity ( 50W to 200W per household ) for ingestions of every bit much as 50 kWh per household per month. However such little energy measures provide of import benefits, such as critical information through wireless and Television ( inoculation runs, spread of unwellnesss ) . Hence, the energy demands of the hapless in stray communities should be improved through promoting the usage of this power beginning.