Monthly Archives: January 2008

The fight on leading the parabolic trough technology is getting hotter….

Despite Solel “connecting” itself to the 354MW of SEGS plants in Mojave Desert, “making the impression” as if they commissioned these plants; actually till now they “only” manufactured and supplied several essential equipment and technology, spare parts etc, but have no experience what so ever in designing and commissioning power plants.  During the last years a real competition raised, while other entities have gained experience in designing and building plants based on parabolic trough.  Abengoa Solar, Sener, Solar Millennium, Iberdola and Solargenix (now by Acciona Solar Power) have hired experienced employees (former Luz, DOE, NREL etc.) and are “jeopardizing” Solel’s leadership. However, with 150MW order in Spain and possible 553MW PPA for PG&E and the latest announcement of 105MUSD investment by ECOFIN – it seems that Solel is starting positioning itself again on the right track.

Nevertheless, without a second significant round of investment and a strategic partner with track record of building power plants – Solel’s management should suffer from broken sleep….

Utilities teaming up for major solar project


By: Associated Press - PHOENIX — A group of utilities wants to build Arizona‘s largest solar-thermal power plant, which could light up thousands of homes and help them meet the state’s renewable-energy requirements.Arizona Public Service Co., Salt River Project, Tucson Electric Power and several small companies have banded with out-of-state utilities in plans to build the major solar project. Also part of the group is the Southern California Public Power Authority and Xcel Energy Inc. of Minnesota, which provides power in eight Western and Midwestern states.The companies announced Thursday that they are seeking proposals from companies interested in building the project and said that it could be located in either Arizona or Nevada.

 

They want a plant that can generate 250 megawatts of electricity, which is enough juice to power 62,500 to 75,000 homes. That’s bigger than similar projects in either state and giant by solar standards.However, it would produce only about 25 percent of the electricity output of a natural-gas powered plant such as the Redhawk Power Station west of Phoenix.State regulators agreed last year to the tradeoff in return for nonpolluting electricity from one of the state’s most abundant commodities. They imposed a mandate that utilities get 15 percent of their electricity from renewable sources such as solar power by 2025.

“Our objective is to create a balanced portfolio” of energy, APS spokesman Steven Gotfried said. “We can get the benefits of the renewable, plus the benefits of traditional power generation.”

Utility officials did not announce how the costs and electricity would be distributed.

Proposals from potential builders are due March 19 2008, and the utilities hope to select a builder by June 11. A requirement of the project is to be operational by Dec. 31, 2012.  

more on thin-film….

Carvin Goldstone
 

There is light at the end of the tunnel – and it’s not being generated by Eskom but rather by revolutionary solar-powered technology developed by University of Johannesburg professor Vivian Alberts.

He has spent the past 13 years developing highly advanced photovoltaic, or thin-film, solar panels that could be the solution to South Africa – and the world’s – scramble for power.

The panels are already being constructed by Johanna Solar Technology (JST) in Brandenburg, Germany, and will go on sale in Europe this year.

According to JST, current solar modules convert only direct sunlight into electrical energy, but thin-film solar modules convert any light across the spectrum into electricity – generating power even under low-light conditions.

New designs can make photovoltaics much more competitive, but it didnot measure up to the expectations yet…….. - If lack of financing is one of the obstacles – do approach us………………………..……PV@ags-tech.com

Solar cells are the most efficient mean of converting solar energy into electrical energy directly. During last years, technological advances – mainly have made it possible for Photovoltaics to be competitive in a variety of applications. It is expected that in the next 5 to 10 years the photovoltaic industry will expand due to supporting infrastructure, required new materials, processes and automated manufacturing lines of cells and arrays. It seems that the current general trend to support solar thermal CSP will gradually be changed towards Photovoltaics following technological advances. Even now, with proper cells, sun concentration techniques, optimal optical configuration and cooling methods, commercial Photovoltaics can be competitive and even superior – in many market niches – with CSP and even with conventional power generation systems.

Photovoltaic technology was first created about 55 years ago, while in the early 1980s the first thin-film cells achieved more than 10 percent efficiency, and the peak watt cost was around 10USD.  In the 1990s polycrystalline thin films achieved 16 percent efficiency, and price went below 5USD per peak watt. 

Nano-photovoltaic can reduce dramatically the production costs, and operating cells under concentrated sun with selected spectrum bands can achieve satisfactory conversion efficiencies, because the efficiency of a solar call is higher in some bands of spectral than the other. By splitting the solar spectrum one can enhance the efficiency and by the way, solve the issue of cooling the cells. Moreover, by installing second concentrator optical element just above the concentrator cell, the concentrator ratio could be increased and focus isotropic illumination on the concentrator. (Here is to mention, that while it might be difficult to operate silicon cells above 300 suns, Gallium Arsenide, for example, could achieve reasonable efficiencies with up to 1000 suns). Another design involves light-confining cavities formed by several cells, while the incoming radiation is introduced through a small aperture, which prevent the light from escaping. It seems also, that refractive concentrators equipped with Fresnel lenses could perform better than reflective concentrators. It seems that Fresnel lenses will be preferred for photovoltaics, while mirrors are still preferred in solar thermal applications.

However, the current challenge is to build an automated production line capable of producing thousands of MWatts annually of wafers, cells, modules and inverters, and providing erection and after sales rapid response 24/7 service for many years.

 If you have achieved several referenceable customers or won a significant project and looking for a true partner plus a financial backer – Do take advantage of our network of potential investors, strategic partners and industry contacts.  

email to: PV@ags-tech.com   

Nation’s Largest Solar PV System Takes Flight at Nellis Air Force Base

The U.S. Air Force celebrates the completion of North America’s largest solar photovoltaic system at Nellis Air Force Base.A joint project of the U.S. Air Force, MMA Renewable Ventures, LLC, a subsidiary of Municipal Mortgage & Equity, LLC (NYSE: MMA), SunPower Corporation (Nasdaq: SPWR), and Nevada Power Company, the 14 megawatt Nellis solar energy system will generate more than 30 million kilowatt-hours (kWh) of clean electricity annually and supply approximately 25 percent of the total power used at the base, where 12,000 people live and work.Combining technology and systems expertise from SunPower Corporation and financing by MMA Renewable Ventures with discounted purchase commitments by the U.S. Air Force, the innovative Nellis solar energy system demonstrates that the U.S. government’s goals for enhancing security through energy independence can be met both economically and practically when the public and private sectors work together.SunPower Corporation designed and built the photovoltaic power plant using its proprietary single-axis SunPower® T20 Tracker solar tracking system which follows the sun throughout the day and delivers up to 30 percent more energy than traditional fixed-tilt ground systems. Equally innovative is the funding and ownership of the landmark solar energy system: MMA Renewable Ventures, LLC has financed and will operate the solar power plant, selling electricity to Nellis Air Force Base at a guaranteed fixed rate for the next 20 years. Nevada Power will support the project by purchasing Renewable Energy Credits (RECs) generated by the solar array. MMA Renewable Ventures closed a fund for the system earlier this year with financing commitments from Citi, Allstate, and John Hancock Financial Services, with Merrill Lynch providing construction financing. Dignitaries such as Air Force Assistant Secretary William Anderson and Nevada Governor Jim Gibbons will flip a switch marking full operation of the system at a ceremony to be held today at the Nellis base. A team including MMA Renewable Ventures, SunPower Corporation, and Nevada Power Company will join public officials in recognizing the United States Air Force for its commitment to national security, energy independence and environmental sustainability. “This solar project at Nellis is a first step of many toward making renewable electricity integral to the operations of the U.S. Air Force,” said Assistant Secretary Anderson. “As the largest consumer of energy in the federal government, the Air Force is well-positioned to promote both solar technology and new approaches to its implementation. This pioneering initiative is a good example of how a creative approach to public-private partnership can make our energy supply more sustainable, more secure and more affordable.” “The best way to secure a healthy and prosperous economy is to develop our affordable, reliable local resources,” said Governor Gibbons. “With these 14 megawatts, Nellis Air Force Base is leading the country in solar energy deployment, a move that is good for the environment and our nation’s energy security alike.”Covering 140 acres of land at the western edge of the Nellis base, the photovoltaic system comprises 72,000 solar panels using the SunPower Tracker technology. The energy generated will support over 12,000 military and civilians at Nellis who are responsible for Air Force advanced combat training, tactics development and operational testing. “We are faced with an incredible opportunity to promote U.S. energy security by developing our own abundant domestic resources,” said United States Senate Majority Leader Harry Reid of Nevada. “Nevada and the United States have the technology and natural resources to serve our growing power demand with clean, renewable energy. I congratulate the Air Force for its continued leadership on clean power.”“Nellis, the ‘Home of the Fighter Pilot,’ is now home to the largest solar electric power plant in all of North America,” said Colonel Michael Bartley, Nellis Air Force Base commander. “Our base and indeed our entire nation will benefit from the predictable, secure supply of clean energy that this landmark power plant is now generating. The project also provides a future test bed for the Department of Defense to assess the benefits of similar arrangements on installations across the United States.” “The Nellis project is a powerful demonstration of the U.S. Air Force’s ability to execute on its aggressive goals for clean energy. From early concept through today’s dedication, the Air Force collaborated closely with the strong coalition of partners instrumental in making this grand vision for solar a reality, and we look forward to maintaining that solid relationship over the long life of this clean energy system,” said Matt Cheney, CEO of MMA Renewable Ventures. “The Nellis project further demonstrates how public-private partnership coupled with an innovative approach to third-party finance can make solar an affordable solution at even the largest scale.” “We congratulate the Air Force for having the vision to make solar power a mainstream energy source, and for hosting the largest solar photovoltaic system in the nation,” said Tom Werner, CEO of SunPower. “Solar power is the fastest growing energy resource to help meet our escalating power demand, generating reliable, affordable power without creating emissions or waste. Nellis’ decision to maximize the size and efficiency of its solar system underscores its commitment to secure energy and environmental preservation. We are proud that SunPower was selected by the Air Force to design, supply, and build this hallmark project.”“Working with partners, such as Nellis Air Force Base, to develop and generate solar energy projects is part of our strategy of providing clean, safe, reliable electricity to our customers at reasonable and predictable prices,” said Michael Yackira, chief executive officer of Sierra Pacific Resources, parent company of Nevada Power. “Now that the Nellis solar energy system is on-line, the state of Nevada will be number one in the United States in solar generation per capita. We plan to expand our investments in renewable energy in order to increase the leadership position our company already has in renewable energy nationwide.” Source: By Sunpower Corporation.  

California PUC Approves 3 Utility Scale Solar Thermal Projects

Pacific Gas and Electric Company announced recently that the California Public Utilities Commission (CPUC) has approved four new renewable energy power purchase agreements. The four renewable projects ? three utility-scale solar and one geothermal ? will generate 585.5 megawatts (MW) of renewable, clean electricity for PG&E’s customers in northern and central California.Among the four new contracts, PG&E announced a landmark solar thermal project with Solel-MSP-1. The Mojave Solar Park, to be constructed in California’s Mojave Desert will deliver 553 MW of solar power, the equivalent of powering 400,000 homes. The plant utilizes Solel’s patented and commercially-proven solar thermal parabolic trough technology. When fully operational in 2011, the Mojave Solar Park plant will cover up to 6,000 acres, or nine square miles in the Mojave Desert. The project will rely on 1.2 million mirrors and 317 miles of vacuum tubing to capture the desert sun’s heat.

PG&E also announced two utility-scale photovoltaic solar power projects with Cleantech America LLC and GreenVolts, Inc. The projects will deliver up to 7 MW of renewable energy and will be completed in 2009. Both projects utilize photovoltaic technologies to collect sunlight and convert it directly to electricity. The solar power plants will be located in close proximity to PG&E’s infrastructure and customer base to reduce transmission costs.

The fourth approved contract is with Western GeoPower, Inc. for 25.5 MW of renewable geothermal energy from The Geysers Geothermal Field in Northern California. Located 75 miles north of San Francisco, California, The Geysers Geothermal Field is the largest producer of geothermal electricity in the world. Commercial geothermal power has been generated continuously at The Geysers Field since 1960.

On average, PG&E currently supplies over 50% of its customer load with carbon-free energy sources and about 12 percent from qualifying renewable sources under California’s Renewable Portfolio Standard (RPS) program. PG&E continues to aggressively add renewable electric power to its supply and is on target to exceed 20 percent under contract or delivered by 2010. PG&E recently signed agreements with producers of 2 MW of wave energy, 177 MW of solar thermal power and 150 MW of wind power and is seeking regulatory approval of these purchasing agreements.

California’s RPS Program requires each utility to increase its procurement of eligible renewable generating resources by one percent of load per year to achieve a 20 percent renewables goal by 2010. The RPS Program was passed by the Legislature and is managed by California’s Public Utilities Commission and Energy Commission.source: CleanEdge 

Nano flakes to promise improved solar energy efficiency

London, Dec 30 (ANI): A nanophysicist has paved the way for a revolution in the transformation of solar energy to electricity, by discovering a new material, called nano flakes.Martin Aagesen reckons that the nano flakes are capable enough to transform 30 per cent of the solar energy into electricity, which is double the amount that is converted today. I discovered a perfect crystalline structure. That is a very rare sight. While being a perfect crystalline structure we could see that it also absorbed all light. It could become the perfect solar cell, Nature quoted Aagesen, as saying. The potential is unmistakeable. We can reduce the solar cell production costs because we use less of the expensive semi conducting silicium in the process due to the use of nano-technology, he added. Aagesen believes that the future solar cells would utilize the solar energy better, as the distance of energy transportation will be small thereby diminishing the loss of energy.If Aagesens future cells get their way, the finding will prove to be a major breakthrough in shooting up the exploitation of solar energy. (ANI)