Posts Tagged ‘Convection Currents’

Versatile Solar Energy – Advantages Of Solar Energy

January 31st, 2010

Solar radiations vary in frequencies from infrared through the visible to ultraviolet frequencies. We receive light through the visible radiations and heat through the infrared radiations. We tend to have been learning currently how versatile solar energy is.

Even in the traditional times individuals made use of the solar radiation for heating water and warming homes in winter. In recent years, thanks to technological advances, solar energy is being used for applications ranging from domestic hot water offer or area heating of large buildings, to providing steam and hot water for industrial processes and for providing steam in giant thermal power stations to supplement power generation.

Modern developments have given a new angle to the use of solar energy. Invention and later developments of photovoltaic (PV) cells has created it possible for us to convert energy from the visible radiations into electricity. Individual solar cells which are little are assembled in various configurations as arrays and panels; these solar arrays and panels will generate sufficient electricity for sensible applications.

Arrays of PV cells are being used in remote and inaccessible communities to supply clean power and they’re being used to run cars. PV cells offer power on satellites and space stations and even supplement power generation in power stations of tons of MW. Growing at a rate of forty% since the year 2000, put in capacity of solar electrical production has touched 10.half dozen GW in 2007.

The above two instances of the use of solar energy are the terribly obvious and terribly a lot of talked about ones. But return to consider it, there’s hardly any renewable energy source that doesn’t link back to the versatile solar energy.

Assume of wind energy. Mild movement of air is breeze; more strong movement of air is wind. Unequal heating and cooling of different components of land and water by solar radiation creates convection currents that end in wind. Windmills are driven by the kinetic energy of the wind. Solar energy is responsible for the heating of the land and the water masses; therefore it’s the solar heat that’s accountable for making wind. So extremely speaking, wind serves just as a carrier of the versatile solar energy.

Similar is that the case with tidal energy. Tides result from the interaction of gravitational pulls of the sun and therefore the moon on the water bodies on earth coupled with the rotation of earth. Once again we tend to notice the sun is instrumental in creating the tidal waves that we tend to are making an attempt to harness to extract energy from.

Biomass is being employed as a renewable supply of energy. A very little thought tells us that the energy biomass gives out is that the solar energy stored in the form of carbohydrates and by burning the biomass – which is burning the carbohydrates – we tend to are releasing that stored solar heat. Once more it is the versatile solar energy in an exceedingly different kind that we are using.

The fossil fuel that we are using in each walk of life nowadays is additionally another example of stored solar energy. Fossil fuel has resulted from animal remains, biomass, etc innumerable years ago. Once once more fossil fuels are a kind of stored solar energy, just as we said biomass is the stored solar energy.

We have a tendency to said at the outset of this text that solar energy is terribly versatile. As seen by these few examples higher than, we tend to have been utilizing versatile solar energy in many forms.

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Types Of Solar Energy

January 23rd, 2010

Solar energy comes in many forms. The majority people are most familiar with solar cells, however there are actually many different ways to create and store solar energy. Here are a few of those ways in which:

· Solar Cells – Most people have seen solar cells used on calculators with LCDs. But they need conjointly been utilized in many other ways. Solar cells use semiconductors (oftentimes, silicon) to come up with electricity, directly from the sunlight.

· Solar Fibers – This is additionally a photovoltaic device (like the solar cells), only it does not use silicon. Rather, it’s a solar tape that is made with titanium dioxide. This tape might really be combined with building materials or perhaps clothing.

· Solar Pond – A solar pond is made of three layers: the high layer as low salt content. The middle layer is an insulating layer with salt, and it prevents natural convection within the water (that would normally cause heat exchange). The underside layer as a terribly high salt content, and this layer can approach high temperatures. As a result of of all the densities in salt of the various layers, there are no convection currents (which normally transfer heat to the surface and then the air). The warmth that gets trapped in the underside layer will be used to heat buildings, generate electricity, or in industrial processes.

· Solar Chemical – There are a number of various solar energy processes that absorb sunlight during a chemical reaction to create that solar energy. More research is required on solar chemical energy before we tend to can apply it practically. Much of this research is on photoelectrolysis of water.

· Solar Updraft Tower – This is often a type of solar energy plant in which air passes under an agricultural glass house, gets heated by the sun, and is then channel up toward a convection tower. It’s used to drive turbines that generate electricity.

· Energy Tower – This tower uses water, sadly, however it is additionally a good style and works during a similar manner to the solar updraft tower. Water is sprayed at the high of the water. The water evaporates which causes a downdraft by cooling the air. This coolness increases the density of the air and then drives turbines that are at the underside of the tower.

These are simply some ways that in that solar energy has been and is being created. Perhaps the foremost common household sort of solar energy is that created by solar cells. Nonetheless, these other sorts are very promising and actually have their place.
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