Japan Creates Mega Solar City -Leads World

In an effort to create one of Japan’s greenest urban areas and clean up its air by reducing CO2 emissions, Japan announced that two gigantic solar power generation plants will be installed in Sakai City.

The title of the project is quite a mouth full – the Sakai City Waterfront Mega Solar Power Generation Plan. Say that three times fast. I guess the title has to be fitting for the size of the project, however, because the two facilities will have a 28,000 kW combined maximum capacity and will help to reduce CO2 emissions by a whopping 10,000 tons annually. The city will work in conjunction with Sharp Japan and Kansai Electric Power, with Sharp planning on using thin-film silicon solar modules.

The project is off to a pretty good start on the “Cool City Sakai” low-carbon metropolis initiative, with the first facility to be erected atop an industrial waste landfill, and the second will actually be solar power generation facilities installed on Sharp’s and other companies’ buildings in a manufacturing complex, so Sharp can run on solar, making their products just that much greener.

Japan is fast becoming the world’s solar capital. Meanwhile, back in the U.S., leaders in the U.S. solar energy industry blasted the U.S. government on Monday for a freeze on applications for new solar projects on public land in six Western states.

The Bureau of Land Management announced the freeze a month ago, saying it would conduct an extensive study looking at the environmental, social and economic impacts of solar energy development.

During the 22-month study, the agency will not consider any new proposals for solar energy developments on public land in Arizona, California, Colorado, Nevada, New Mexico or Utah.

Fred Morse, senior advisor for U.S. operations at Abengoa Solar, a Spanish company with a solar plant in development in Arizona, said the moratorium could hurt many companies in the burgeoning U.S. industry.

(Source: http://www.dailygalaxy.com/my_weblog/2008/07/japan-creates-m.html)

(Original 1: http://www.goodcleantech.com/2008/06/sakai_city_waterfront_mega_sol.php)
(Original 1: http://www.enn.com/energy/article/37536)

Utility-Scale Solar Power

Rather than using large reflective surfaces, the eSolar array uses smaller reflective surfaces, reducing the installation costs, control costs. The smaller size also means increased construction speeds. Also the decreased wind profile means increased up-time. Each array, or module, is 25 MW; which can be multipled for larger plant needs.

(Source: http://peswiki.com/index.php/Directory:eSolar)

Municipal Solar Power Plants

April 16, 2008
Posted by Martin Roscheisen, CEO

At Nanosolar, we believe very much that meaningful scale for solar will come foremost from utility-scale solar power plants, in particular from municipal solar power plants of 2-10MW in size. These are rows of solar panels mounted onto the ground of free fields at the outskirts of towns and cities, feeding power directly into the municipal electricity grid.

A 2MW municipal solar power plant requires about 10 acres of land to serve a city of 1,000 homes — that’s acreage generally easily available at the outskirts of any city of such size in even the most developed countries. Similar for a 10MW plant for a city with 5,000 homes: This would require five such lots.

Municipal solar power plants are an avenue for delivering a Gigawatt of power in a state through one solar farm each in a few hundred cities — local to where the power is needed — as opposed to constructing a new coal-fired or nuclear plant. They can also be deployed very rapidly. (It takes 10-15 years to get a new coal plant done; a solar plant can be done in 12 months — provided no administrative blocks exist).

In a solar power plant, solar panels are mounted onto rails above the ground so that grass and flowers can continue to flourish in between and below the rows of panels. Care is taken that sufficient amounts of rainwater can drop through between adjoining panels so that the flowers and organisms below are not starved.

Municipal solar power plants integrate very naturally into the existing landscape as well as the existing electricity grid. By feeding power into the grid directly at municipal voltage levels (typically 20kV), they even avoid the expense of a substation for down-transforming power from high (multi-100kV) transmission voltages as required by conventional power. Furthermore, the solar power plants utilize power inverter electronics with increasingly intelligent features which enlightened utilities around the world are now recognizing as a very good way to improve grid power quality especially at the outer branches of the electric grid where power quality is hard to manage otherwise.

In any region with a decent amount of sunshine, there is no more economic way of reliably providing municipal power during the day than through a municipal solar power plant.

Ground-mounted solar power plants are installed in industrially streamlined ways, with specialized tractors deploying standardized substructure components according to standard system block designs to achieve optimal cost efficiency.

While rooftops are surely a good application too for solar panels, it is a business that’s difficult to scale rapidly in a truly meaningful way. Crawling onto rooftops and mounting solar panels in compliance with building codes is fundamentally always a somewhat more expensive proposition.

Municipal solar power plants can be deployed at a different level of efficiency and speed. This is just not yet known very well to the public, particularly in the United States and in California (where we have California Solar Incentives which are adminstered by the state utilities and which presently block this most cost-efficient form of installing solar).

But towns and cities throughout Europe and Asia have already proven the concept, and more and more — in fact increasingly entire counties — are now implementing plans to go 100% renewable based on a mix of solar and biofuels. It works, it is economic, and it is possible now. (Any U.S. utility executive who is concerned about the new world of local power but desires to learn more should join this trip.) It is a silent revolution going on that the press rarely reports about.

A good exception is an article today in our local newspaper – “Local communities reach for power over energy” (SF Chronicle) – describing how Marin County in California is wrestling with going for local renewable power. We salute their effort. It is well timed, smart, and shows a lot of foresight. They are on the right track based on what we see happening in our own industry and in energy overall. In a few years, they will have less expensive power than it is available in the rest of PG&E territory.

The amount of activity going on behind the scenes in readying technologies, sites, and financings for such is tremendous, and this will become very visible to the public in many locations in the United States in 2010. There is a reason why one of the world’s largest power producers invested in Nanosolar.

But now is the time for cities and counties to lay the adminstrative foundation for having their own power, 100% renewable, if they care to make a difference by then.

PS: The SF Chronicle article describes a dynamic of arguments as it may unfold in a lot of communities these days. There’s the Berkeley professor quoted as the “it’s-too-expensive” skeptic. I went through the economics paper behind this skepticism and am not surprised: First, he predicts the cost of installing multi-MW municipal power based on the cost of a small residential silicon PV rooftop system. Secondly, he extrapolates the near-term cost of solar by averaging legacy technology providers with emerging cost leaders and fails to look at the world’s most streamlined solar installations as a reference (of which there are admittedly none yet in California). I guess these kinds of errors happen as the energy industry transitions to be more like the technology industry.

(Source: http://blog.nanosolar.com/)