Posts Tagged ‘solar energy’

The Costs and Benefits Between Solar and Wind Energy

November 23rd, 2011

Wind energy Vs Solar energy

The costs and benefits between solar and wind energy are very subjective. There are necessarily three factors that determine the economics: capitol costs, operating and maintenance costs and fuel costs.These must be taken into consideration when comparing renewable energy sources with conventional energy sources as well as when comparing one form with the other. Interestingly enough, the cost of renewable energy is enjoying an inherent decreasing cost curve while non-renewable sources are increasing in cost. Generally speaking, costs for photovoltaic and concentrating solar power (CSP) produced energy are higher in comparison to overall wind energy costs. Incidentally, the costs of wind versus nuclear, coal and natural gas are comparable.

There is an increase in the cost of renewable energy when you consider the costs associated with connecting it to the infrastructure that currently exists. Variability in things such as weather, the load demand, and material costs affect the costs and benefits between solar and wind energy. In the time between 2004 and 2008 the two industries experienced a massive increase in productivity. Solar photovoltaic energy production went up more than six hundred percent. Wind powered energy production increased by two-hundred percent in that time. Solar heating and bio-diesel production saw significant increases during that time also. Wind power became established globally between 1996 and 2008. By this year, world wide wind farm capacity reached almost 158,000 megawatts. This shows an increase of thirty-one percent in the last year and accounts for one point three percent of the global electricity consumed. » Read more: The Costs and Benefits Between Solar and Wind Energy

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Lower Your Monthly Utility Bills Through Renewable Energy Using Solar Power Manual DIY Instructions

October 15th, 2011

Many do-it-yourself individuals have found quality information on fabricating their own solar panels using information gathered from solar power manual DIY instructions. Because the current economic crisis has put a monetary strain on many homeowners, they find themselves searching for alternative ways of reducing their monthly financial obligations. Solar energy, wind power, solar heating, thermal energy and bio-diesel are some of the more popular energy sources available to consumers interested in generating their own electricity as a way to help the environment and offset monthly utility costs.

Humans of always relied on solar energy to survive. Since the beginning, the energy of the Sun has provided warmth and light, along with photosynthesis, which allows plant life to grow. For millions of years, this photosynthesis reaction produced huge quantities of fossil fuel oils created by decaying plant life that seeped into the soil. Centuries ago, scientists and inventors realized we could use this oil to run the machinery in our factories, heat our homes and offices, and power the engines for our transportation. » Read more: Lower Your Monthly Utility Bills Through Renewable Energy Using Solar Power Manual DIY Instructions

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An Explanation of Solar Energy Receivers

October 13th, 2011

Hybrid Solar Thermal Power Plants

Hybrid solar thermal power plants are extremely efficient plants that can operate regardless of the time of day or weather, and produce the required power output. When there is no sun, the plant will use natural gas or clean bio-fuels instead. A hybrid plant will typically consist of the following: a solar tower (a large insulated tower with air), heliostats (devices that concentrate solar power and follow the sun using tracking sensors and drive motors), as well as a solar energy receiver.

Here is how the plant operates

Solar power is first concentrated by the heliostat (up to 1000 times), and then absorbed in the solar energy receivers mounted on the tower. The solar receiver’s surface starts to emit hot air into the tower (towers have a porous surface for the air to pass through). Hot air is drawn through the tower by a fan, until it reaches the thermal cycle engine. When it does, the engine begins to convert the air into mechanical energy. The mechanical energy is then converted into electric by an electric generator. » Read more: An Explanation of Solar Energy Receivers

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