5 Comments
Deleted
ields is at an idealCoach Factory Online depth for snacking onCoach Factory Outletmarsh plants. A bitCoach Outlet Storeof grain is left ovCoach Outletr from the harvestCoach Outlet Online around the NorthernCoach Outlet California city of CCoach Outlet
hico, which is gearChanel Handbags
ing up for its annuaCoach Outlet
l Snow Goose FestivaCoach Outlet
l.In places where thChanel Bags
e birds sojourn in thCoach Factory Outlet
e winter, Missouri andCoach Outlet Online
Mississippi River fCoach Outlet
armers consider themCoach Outlet
pests that not onlyCoach Outlet Online
eat grains but alsoCoach Factory Outlet
peck and claw at plaLouis Vuitton Bags
nt roots. In ChincotCoach Factory Store
eague Bay in Maryland, theyCoach Outlet
turned stretches ofrl=http://www.coachoutletonlinet.org/]Coach Factory Outlet[/url]
marsh into open watCoach Outlet Store
er.Whether the causeCoach Factory Outlet
of this populationCoach Outlet
explosion is a warmChanel Bags
ing trend in NortheChanel Bags
rn breeding grounds,Louis Vuitton
an increase in theCoach Factory Store
food supply in theirChanel Handbags
winter homes or a cCoach Outlet
ombination, few woulChanel Bags
d dispute that thereurl=http://www.louis-vuittonses.net/]Louis Vuitton Purses[/url]
are too many birds iCoach Factory Online
n all five groups ofCoach Outlet
snow geese that migrChanel Bags
ate along North AmerCoach Outlet
ica’s flyways. “NatLouis Vuitton Bags
ionally, snow geeseCoach Factory Outlet
numbers are increasiChanel Bags
ng exponentially,”Coach Outlet
said Dan Frisk, the Coach Factory100
WILLOWS, Calif.100 — Coach Factory OutletThese are good days toCoach Outlet Onlinebe a snow goose on tCoach Factory Outlethe Pacific flyway. ThCoach Outlete water in the rice fCoach Outlet
ields is at an idealCoach Factory Online depth for snacking onCoach Factory Outletmarsh plants. A bitCoach Outlet Storeof grain is left ovCoach Outletr from the harvestCoach Outlet Online around the NorthernCoach Outlet California city of CCoach Outlet
hico, which is gearChanel Handbags
ing up for its annuaCoach Outlet
l Snow Goose FestivaCoach Outlet
l.In places where thChanel Bags
e birds sojourn in thCoach Factory Outlet
e winter, Missouri andCoach Outlet Online
Mississippi River fCoach Outlet
armers consider themCoach Outlet
pests that not onlyCoach Outlet Online
eat grains but alsoCoach Factory Outlet
peck and claw at plaLouis Vuitton Bags
nt roots. In ChincotCoach Factory Store
eague Bay in Maryland, theyCoach Outlet
turned stretches ofrl=http://www.coachoutletonlinet.org/]Coach Factory Outlet[/url]
marsh into open watCoach Outlet Store
er.Whether the causeCoach Factory Outlet
of this populationCoach Outlet
explosion is a warmChanel Bags
ing trend in NortheChanel Bags
rn breeding grounds,Louis Vuitton
an increase in theCoach Factory Store
food supply in theirChanel Handbags
winter homes or a cCoach Outlet
ombination, few woulChanel Bags
d dispute that thereurl=http://www.louis-vuittonses.net/]Louis Vuitton Purses[/url]
are too many birds iCoach Factory Online
n all five groups ofCoach Outlet
snow geese that migrChanel Bags
ate along North AmerCoach Outlet
ica’s flyways. “NatLouis Vuitton Bags
ionally, snow geeseCoach Factory Outlet
numbers are increasiChanel Bags
ng exponentially,”Coach Outlet
said Dan Frisk, the Coach Factory100
, on December 31, 2011 [report post] [quote] [reply]
Guest
nike dunks (112.111.160.47), on June 05, 2010 [report post] [quote] [reply]
Guest
coach outlet (112.111.160.47), on June 05, 2010 [report post] [quote] [reply]
Guest
coach outlet (112.111.160.47), on June 05, 2010 [report post] [quote] [reply]
Guest
What is
SOLAR ENERGY?
What Is Solar Energy?
Plants have been using the energy from the sun for billions of years. Until recently, however, this energy has been available only indirectly to humans via the energy we harvest in the form of everything from fossil fuels to plants to wind power (all solar energy derivatives).
Today, as environmental awareness and rising oil prices put pressure on society, the potential of emerging solar energy technologies that directly harness the nearly limitless energy of the sun is increasingly desirable and economically feasible.
Harnessing Solar Energy
Harnessing solar energy involves both the direct use of the radiated heat as well as its conversion to electricity in the most efficient way possible. There are three categories that define every type of solar energy technology.
First, passive solar collection begins with the design of the building and includes optimal location, windows facing south, walls that absorb heat and light, and plenty of insulation. The heat and light that is collected is used in its original form of heat or light such as in a greenhouse. For example, the chapel on the Massachusetts Institute of Technology campus has no windows, but has been designed such that natural light reflects off the surrounding moat and into the room. Passive collection is much easier to include in new construction because retrofitting an existing building can be difficult and costly. Active solar collection implies converting solar energy to a more usable form of heat or electricity.
A second distinction is the type of energy an active solar system creates. Thermal applications include heat collection and heat-driven mechanisms, such as converting water to steam to power a steam engine that generates electricity. Electric processes use photovoltaic cells that create a moving electric charge that produces a direct electric current. PV panels have been used successfully on satellites and have a life expectancy of thirty years, making them an economically viable option for commercial use.
Finally, a third distinction in solar energy concerns the degree of concentration used in harnessing the suns energy. Concentrating systems engage mirrors and lenses to direct the sunlight to the area of collection. In some systems, parabolic trough-shaped structures of photovoltaic cells can even be powered to follow the motion of the sun allow for increased electricity generation. Non-concentrating systems are often simple flat panel collectors that are most commonly found as rooftop PV or as solar pool heaters.
The Solar Electricity Industry
In 2005, the amount of electricity generated by photovoltaic systems increased by 56% and resulted in 1,445 megawatts (MW) of PV being installed in the United States, Germany, Japan, among others. At the average of $8.00 per watt, this is a worldwide $12 billion investment in the solar energy markets in 2005 alone. Due to this market growth and increased capital for research and development, production costs for solar electricity are decreasing by five to seven percent per year.
Japan and Germany support the two largest solar markets due to targeted government subsidies designed to stimulate their growth. Japanese companies produced 47% of the PV cells manufactured globally in 2005, while Germany represented half of the installations. The US, once a leader in this technology represented less than 10% of both production and installations globally in 2005.
Worldwide, solar currently provides less than one percent of electricity demand but is projected to supply 26% of the worlds consumption by 2040. This industrial transition will occur as solar generated electricity becomes cost effective throughout the United States and much of the world.
MNURI YESILGOZ (99.235.210.245), on February 14, 2010 [report post] [quote] [reply]