There are two main types of solar power generation methods used to produce electricity on a commercial scale. Photovoltaic panels, which are the large collections of the systems that you see in small scale on house roofs. Concentrating solar power (CSP) uses thermal solar power, the heat of the sun, to produce environmentally friendly energy.

It’s the way in which concentrating solar power plants produce electricity that we will concentrate on here. CSP plants are capable of producing electricity at a higher maximum capacity than a photovoltaic facility of the same size. As renewable energy continues to be advanced, we will see more concentrating solar power plants get developed.

The four main comercially productive concentrating solar power systems are: parabolic troughs, dish / engine systems, fresnel reflectors and central receiver systems. The technology involved with each is proven and either has been or still is in operation around the world with further concentrating solar power plants in progress to increase global capacity.

Parabolic troughs use mirrors to direct sunlight onto a fluid-filled receiver positioned in directly in front of each trough. The fluids are heated to very high temperatures so that super-charged steam is produced. A conventional steam generator is then used to produce electricity.

A trough-based CSP plant typically consists of rows of mirrored troughs placed parallel to each other along a north-south axis in what is known as a collector field. Optimum heat exposure is maintained thanks to the pivoting nature of the parabolic troughs which track the sun's movement across the sky. Thermal storage is also used to allow electricity generation to continue even when the sun is not available. Technological advancements are continuing to prolong this production period in a bid to move to continuous solar electricity production.

Power plants known as Andasol 1, Andasol 2 and Andasol 3 in Spain all use the parabolic trough design, forming a combined 150MW solar power plant. The surface area of the mirrors used to form the energy collection field of Andasol 3 alone is around 500,000m2.

Fresnel relectors are similar to parabolic troughs except they are flat mirrors that focus light onto one receiver. This is a simpler system to the parabolic trough system with fewer moving parts and the rows can be positioned closer together. The receiver is stationary and it is shared by multiple mirrors.

An example of a recently commissioned CSP plant using reflector technology is the Kimberlina CSP plant in California developed by Ausra. This power plant is relatively small at only 5MW capacity, but it paves the way for future large-scale developments.

Dish / engine systems are stand-alone units that contain dish-shaped parabolic mirrors that concentrate the sun’s energy onto a receiver mounted above the dish. The receiver takes the energy and converts it into heat which is then converted into mechanical power, similar to a mechanical engine. Each dish / engine unit has a capacity of around 25kW of solar power and it tracks the sun to ensure optimum power.

An example of the dish / engine technology is the Stirling Energy Systems dish called the Suncatcher that will be used in fields of thousands to form a power facility capable of generating over 500MW of electricity.

Central receiver systems are also known as power towers. Looking as though they're honoring a higher deity, thousands of mirrors called heliostats cluster around a receiver that sits atop a tall tower. The heat that is collected by the receiver then heats molten salt as it flows through which is then used to make steam that operates a conventional steam generator. The molten salt can be stored for great lengths of time which means that this type of solar energy generates electricity continuously around the clock.

An example of a central receiver system in development is the Solar Tres power plant being built in Spain. The Solar Tres power plant will be a 15MW facility and it follows on from the successful demonstration power plant known as Solar Two which was located in the Mojave Desert.

One of the crippling problems with solar energy has been the high cost per watt of electricity, but technological advancements are bringing those costs down. Already, concentrating solar power plants hold a huge advantage over the traditional fossil fuelled counterparts in the lower impact to the environment. In fact, one of the only impacts that concentrating solar power plants have on the environment is land use.

There continues to be solid progress made in ways in which renewable energy is used to replace traditional energy sources. Concentrating solar power has proven to be a renewable energy source with still more untapped potential

Lots of people actually already have basic understanding about solar energy. Discussing about solar energy will be near to discuss how the sun can provide inexpensive energy. Actually, lots of people have used the sun's power to warmth water and air for various energy resources. Moreover, lots of people switch to solar energy since it’s the cleanest and most viable form of renewable energy.

Solar energy detains the sun's rays by using photovoltaic cell that alters the energy into electricity in order to supply electrical energy. In fact, electricity can be converted to the type 120-volt alternating current although the electricity produced is only 12-volt direct current.

Commonly, power converter is used to wielding this energy by most household electrical appliances. Additionally, the number appliances that operate on 120-vot direct current are increasing these days. They do work with solar energy even though most of them were designed for portable use by being plugged into a vehicles 12-volt outlet.

Homes or business can safe the costs of energy by using the solar energy. Since the present crop of solar cells, the grouping of photovoltaic cells that convert the energy into electricity only operates at about 15-percent efficiency, so many of them are required that it is costly to install enough of them to give the power needs.

Return on Investment Provides Low-Cost Electricity

Even though the present high initial cost, once a facility has been converted to solar energy they can use far less power from the utility grid. The more power that is changed from the sun the less electricity is need, putting a significant dent in the electric bills. It's estimated that the initial cost of converting an usual home to solar energy will be recouped in about 15 to 18 years.

During that period, electric bills will be much lower and once the charge has been recovered, the payoff can be incredible. The investment is considered worthwhile with most of the components needed to trigger a home on solar energy having a warranted life of 20 years. However, not all appliances, such as electric heaters and those that use a large amount of power for operation, may still need more than the sun for their use.

Many homes that have turned to solar energy remain connected to the power grid. It generally happens for the times that the sun is not shining strong enough. The power grid is used to power the solar cells and to have adequate electric to power some of the more energy-hungry devices in the house.

Solar energy will help to get substitute energy that last very long. To get more information, you can explore this useful site about solar energy.