Entire State of Texas Could be Powered by Solar
Original Source: http://cleantechnica.com
Author:Jake Richardson
Original Publication Date:22 April 2009
A recent study released by Public Citizen, a consumer advocacy organization, and several environmental organizations has concluded that solar technology alone could supply electricity for the whole state.
They cite a number of mind-blowing prospects from a variety of sources, all pointing to Texas as having the number one solar generating potential of the US states.
Concentrating solar power in Texas was found by one study to have a potential capacity of 148,000 megawatts. That is just one solar technology type. (The current total solar power capacity of the US is about 9,000 MW, – wind is 26,000 MW). Their study document also states, “11 Photovoltaic plants covering 30 miles by 30 miles could power the entire state.” The types of technology referenced are photovoltaics, thin film photovoltaics, concentrating solar power, parabolic troughs, parabolic dishes/sterling engines, central receivers, linear fresnel reflectors, and solar water heaters.
Technologies
Thin film photovoltaics employ semiconductors several millionths of a meter thick and can be applied to many sun-facing surfaces such as building exteriors. Production costs and times are low. The number of thin film modules produced may exceed the crystalline variety within 1-2 years.
Concentrating solar power uses mirrors to increase energy intensity to heat a liquid to 400 degrees C, which reportedly stores the energy more efficiently that conversion directly to electricity that is stored in batteries. The stored heated liquid can produce energy on cloudy days and at night.
Parabolic troughs are a type of concentrated solar power that uses shaped mirrors which follow the sun during the day and heat up a liquid which then heats water to make steam in order to move conventional turbines.
Parabolic dishes are like large satellite dishes with curved mirrors that reflect sunlight to a central point where the energy heats to 750 C. A liquid also heats up and drives a piston to generate electricity.
Central receivers use an array of mirrors in a tower to heat up a liquid to 650 C. Steam is produced to drive a turbine. Linear fresnel reflectors use long rows of reflectors to heat a liquid or to directly make steam. They don’t generate as much energy but could cost less in production and long-term maintenance. To reduce energy consumption hot waters could be used. For example, over 80% of homes in Israel have solar water heaters, according to the report.
New Jobs
Also cited is the job growth potential should Texas become a world leader in solar technology. An institute at the University of Texas at Austin found that 123,000 jobs could be created in the long-term in manufacturing and solar electrical services.
Texas is already a leader in wind power. Coupled with its’ colosal solar potential, the state is poised to become a true force of nature in the clean energy arena, nationally and perhaps globally.
Image Credit: Public Domain
