There are two main laws in physics concerning wind power. The first one states that the power available in the wind proportional to the cube of the wind speed. This means if the wind speed doubles, the power available at the wind generator blades increases by the factor of eight.

Even small increases in wind speed yield major gains in power.An increase in wind speed from 10 to 11 MPH results in a 33% increase in the power of the wind.
          The second law states that the power available to the blades is proportional to the square of the diameter of the rotor. In other words; If you double the diameter of the rotor by making the blades twice as long, you increase the power by the factor of four.

Did you know
...that electric power plants pump more than 11 million tons of pollutants into our air every year?

...that 1.8 billion tons of carbon dioxide are generated as a direct result of an American electricity use?

...that 2 billion people on the planet aren't connected to the electricity distribution network and as I benefits it provides?

...that wind power and other renewables are ready now to provide clean energy for consumers around the world

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Greece is in the eighth place in the use of aeolian energy in the European Union.
In the eighth place in the use of Aeolian energy between the 25 states of EU is found Greece, according to that reports the responsible delegate answering in relative question of member of EU Parliament Manolis Mayrommatis. In the first place it is Germany and follows Spain, Denmark, Italy, Holland, Austria and Portugal.
The rate of use of Aeolian energy in the EU oscillates in the 5% and it is considered relatively small, since the 58% emanate from thermoelectric centres of production, the 19% from nuclear factories and the 18% from Hydro.
EU intents to invest 2,5 billions euro until 2010 in Renewable Energy.

The global wind industry has reached a 50 GW milestone of wind energy capacity installed worldwide, with an increase in total installed generating capacity of 20% in 2004, said representatives from the Global Wind Energy Council - GWEC - at the council’s launch at the Windmasters Dinner, during the HUSUM/Brussels Wind Trade Fair in 22nd September 2005.
"Wind energy has now reached the milestone of 50GW of worldwide installed capacity and the industry is ready for a broader roll out. Wind energy has the maturity, clout and global muscle to deliver deep cuts in CO2, while providing a hedge against fluctuating fossil fuel prices and reduce energy import dependence", said Prof. Arthouros Zervos, Chairman of GWEC. "The global energy challenge of our time is not only to tackle climate change, but to meet the rising demand for energy and to safeguard security of energy supplies. As a power technology which can meet these three challenges, wind energy is a leading candidate".
GWEC, the global forum for the wind energy sector, cald for stronger national and international policies to support the global expansion of wind energy as part of the range of policy options required to tackle climate change. According to the report Wind Force 12, boosting investment in wind energy to a level where it would provide 12% of world electricity generation by 2020 would result in annual reductions of 1,832 million tons of CO2 in 2020 from 1,245,030 MW of wind energy installed. In the report, the value of the global market for wind turbines is to move from the current €8 billion to an € 80 billion annual business by 2020.

Source: U.S. Department of Wind Program

Fair wind in the Greek wind energy sector.
By Kerin Hope. (25/01/2005 - 12:51) Source:
The wind generators expect to increase in the Greek isles after the agreement of the Spanish Iberdrola Co., the passed month to buy off the 49,9% of the Greek Rokas Co., the sovereign domestic producer of aeolian energy. The Spanish energy group, leader worldwide in the production of aeolian energy, made the movement in the Greek market since Mr. Chr. Rokas, founder and directing adviser of company, rejected last year the aggressive offer of constructional company Greek Tehnodomiki. Mr. Pedro Barriuso, head of renewable sources of energy of Iberdrola Co., points out that deal value 85 millions of Euros gives in the group access in South-eastern Europe, a region with powerful developmental prospects. The Iberdrola constitutes is the first international company that enter in Greek market of aeolian energy, via collaboration with domestic producer. "If Greece wants it achieves the objectives of Protocol of Kyoto (in the reduction of emissions of gases), it will be supposed it increases the production of aeolian energy five times more of the to-day existed” declares Mr Barriuso. Greece has been committed that it will increase the production from the renewable sources of energy in the 2.000 MW until 2010. The Rokas Co., is in the Greek stock exchange, has the 40% of Greek market of aeolian energy, with installations of possibility of production 190 MW in seven aeolian parks in all the country. Almost the 1/3 of installations of company are found in the island of Evia and in the north-eastern region of Thrace - regions with high speed of winds all the year through. The economic results last 9 months showed increase of sales of electric energy at 22%, even if the feeble sales of metal manufactures of group led the unified sales to reduction at 3%, to the 34 millions of Euros. Mr. Chr. Rokas stressed that the collaboration will accelerate the growth of Rokas Co., so much in Greece what in the neighbouring Balkan countries. Minimal Greek islands entertain in the present phase aeolian parks, but the number could increase itself in at least 50, data of offered winds. The competition with the tourist industry is not considered problem, because the winds are more powerful in isolated hills that are considered inadequate for growth, as explains Mr. Chr. Rokas. The Rokas Co. investigates already speeds and fluctuations of winds in cities of Bulgaria and Romania, countries what are expected to include themselves in the European Union the 2007. Entire region of Black Sea are considered that it has important prospects for growth of installations of production of aeolian energy. The Iberdrola Co was rendered last year the bigger company of production of aeolian energy of world, with installations of total possibility of production 3.000 MW in aeolian parks in Spain, Portugal and Latin America. Before the agreement, the Rokas Co drew it invests until 400 millions of Euros for the increase of production at 400 MW until the 2009. Revised enterprising plan perhaps it strengthens the production at moreover 200 MW in the same time interval, points out Mr Barriuso.
Copyright The Financial Times Ltd. - All rights reserved.

  • Analysis Briefs of Energy in Greece

  • Energy Production & Cons. in Greece

  • Encarta Encyclopedie Winkler Prins, Porterfield Chickering/Photo Researchers, Inc.

    The to-day Renewable Energy situation in Greece.
    Written April 9, 2004.
    One of the basic bets in Greece is also the increase of infiltration in the balance of production electrical energy of said Renewable Sources Energy (RSE). In the wider determination of APE are included the production electrical energy from hydroelectric (small and big), wind power plant, photovoltaic system, but also the production biomass energy.
    According to the European Community directives, up to 2010 Greece will be supposed to cover the roughly 20% of total production energy from RSE. As a matter of fact, the estimates of factors of market, the objective it is enough difficult to be achieved, after the production by this forms should almost be doubled, however even with difficulty, exists the prospects. Greece is characterized by the the most dowered countries in aeolian potential (winds), make that if it is developed rationally, can contribute multiple and in the production of "Green" energy. However, a line of problems and ankyloses, so much in institutional what in practical level, they have nailed in one degree the extension of wind power plants. It should we mark that the infiltration of RSE in the energy balance has in percentage ceiling. That is to say, it cannot exceed a concrete percentage of total rate of production electrical energy. Thus in no case it will not be supposed it passes from the thought and the most optimist ecologist that in certain times the total of production will emanate from wind power plant, because in a such case we would have current depending on the mirth... of the wind God Aeolos.
    In Greece today the mainer source for electricity generation is the lignite, representing roughly 59% of total production. The fuel oil that is used mainly in units of not connected system (islands) represent roughly 14%, the natural gas roughly 13%, the big hydroelectric roughly 6%. The production from RSE oscillates in roughly 2,5% and this is included the wind power plants, the micrometers hydroelectric work, the biomass and photovoltaic systems.

    Greece: Blowing in the wind
    European Commission, October 28, 2006.

    The wind is an inexhaustible source of energy that does not require any raw materials and produces neither waste nor greenhouse gases. Successors of the windmills, which have been used since ancient times, modern-day windmills are much lighter structures, with excellent aerodynamics.
    They can also generally be sensitively integrated into the landscape, provided that they are appropriately sited. Technological improvements continue to reduce noise levels of wind turbines, and the minimal damage caused to birds (which mostly tend to avoid them) is infinitely smaller than the damage caused by pollution.
    The rapidly expanding wind sector has also become less expensive and more profitable, with production costs only a tenth of what they were 10 years ago. Together with the other renewable energy sources (RES), wind energy helps to reduce fuel consumption and to increase energy self-sufficiency. By giving local communities the capacity to exploit endogenous resources, wind energy has significant potential in rural areas, as well as in peripheral and island regions.
    Blessed by Aeolus, the god of wind, Greece has a considerable wind resource. Although exploitation of this resource has been limited, it still accounted for 451 gigawatts/hour of electricity in 2000, which is equivalent to 135.3 million litres of fuel oil (around 0.3 litres of oil is needed to produce one kilowatt/hour). Having decided to “go with the wind” between 1994 and 1999, the national authorities, with European Union assistance, set up a programme to promote RESs involving the establishment of wind generator parks. Financial incentives to attract private investors proved to be very successful, with the private sector contributing 60% of the total cost of the projects.
    The proposals were assessed on the basis of a series of criteria relating to technical aspects and the choice of sites. Some of these criteria included: exposure to prevailing winds, open location, proximity to a local electricity distribution system, distance from houses, and respect for archaeological heritage and nature preservation. Of the 19 projects approved, 15 have been successfully completed, providing a total installed power of 119.2 megawatts. Although this was a national programme, the regions with the best wind exposure showed the greatest interest and also submitted the best proposals. As a result, twelve projects were located in the department of Euboea, two in the Dodecanese and one in the Cyclades Islands. Inspection of completed projects has shown that in general they have achieved their energy objectives. Twenty-one permanent jobs have been created and a number of temporary jobs for local residents were also created during the construction.

    The "energy" challenges of Mr. Mparozo - President of European Commission
    Financial Times, editorial April 9, 2006.

    What worries more the European Commission is the sector of energy, with 17 governments to have received official warning letters on their failure to apply the being in effect European legislation and to release the purchases of their natural gas and energy. The yesterday's movements of European Commission proove how far still Europe is in to achieve the complete release of market until the middle of 2007. Without fail, it is not easy to convince the governments to relax their policies of protectionism in the sector of energy. Even in the USA, the governments of small states with difficulty were convinced to release their purchases. But the chairman of the European Commission, Mr. Mparozo, has still to takes also other initiatives in this sector, what will vex in the same degree the governments. Brussels will be called very shortly to take decisions on fusions that potentially will dissatisfy the governments of Spain and France. The European Commission examines, also, the subject of new legislation about "fracture of" monopolies of energy, as made the UK in its own national market. London indubitably would want this model to be applied from other states-member. But it is still unknown if they will solve themselves their problems. UK hurried its accuses "cartel of continental Europe" for the ejection of prices of natural gas in heights, but it demonstrated particular slowness in to recognize the role that play their insufficient planning and their investments.

    The Greek Centre for Renewable Energy Sources (CRES)

    The Greek Centre for Renewable Energy Sources (CRES) has developed its own 3 MW demonstration wind farm, aiming to:
    • Test the characteristics of various wind energy exploitation technologies in the case of complex terrain topography
    • Contribute in the development of the Greek wind turbine industry
    • Demonstrate and disseminate wind energy systems
    • Undertake research work for the integration of wind energy technologies with technologies for the production, storage and use of hydrogen (i.e. energy   storage), water desalination systems, etc.
    • Profit on the electricity sales of the farm, contributing to the financial independence of CRES
    The wind farm of CRES is situated in Lavrion, SE Attica, adjacent to its older wind turbine Test Station. It operates in a complex terrain site including hills up to 120m high above sea level and coastal regions. The average annual wind speed is measured 6.7m/s and the turbulence intensity approximately 12%. The energy produced from the wind turbines is fed into the interconnected 20kV electricity grid. Two meteorological masts (100m and 40m), are used to measure the reference wind conditions. more ...

    China’s renewables law.
    By Zhu LiReaping the benefits of wind. A wind farm in Qingdao, Shandong Province NORDEX

    Renewables challenge for the People’s Republic of China.
    The newly passed Renewable Energy Promotion Law has made China a potentially huge player in the future of the world’s renewable energy markets. Although this is an exciting achievement, the government faces great challenges in making the law work and in delivering the necessary results.
    After 18 months of preparation,the Chinese Renewable Energy Promotion Law was formally endorsed by the Standing Committee of the National People’s Congress of China on 28 February 2005. This remarkable move has shown the extent of the Chinese government’s commitment to renewable energy development and its desire to tackle environmental problems and the emerging concerns of energy supply. The new law stipulates the responsibilities of government and society in developing and applying renewable energy. At the same time as the law was passed, the Chinese Government set a target for renewable energy to contribute 10% of the country’s gross energy consumption by 2020, a huge increase from the current 1%. Seeing this as a future stimulus of renewable energy development, many Chinese and international observers are very excited, expecting a tremendous growth in the renewable energy market in the next 15 years as the result of the implementation of this law.


  • Energy Authorities of the State Council are responsible for implementing and managing renewable energy development, including resource surveys.
  • The government budget establishes a renewable energy development fund to support R&D and resource assessment.
  • The government encourages and supports various types of grid-connected renewable energy power generation.
  • Grid enterprizes shall purchase the power produced with renewable energy within the coverage of their power grid, and provide gird-connection service.
  • The grid-connection price of renewable energy power generation shall be determined by the price authorities, and the excess shall be shared in the power selling price within the coverage of the Grid.
  • The Law will be effective in Jan 2006.

  • Source: Renewable Energy World Magazine

    Expected growth of renewables in China under the new law.
    Source: China People’s Daily, 1 March 2005
    Sector Current capacity (end of 2004)
    Expected capacity in 2020
    Wind power 560 MW 20,000 MW
    Solar energy 50 MW 1000 MW
    Biomass 2000 MW 20,000 MW
    Hydro power 7000–8000 MW 31,000 MW

    Sino-German venture for making wind turbines to be launched.
    Nordex establishing joint venture in China Production facility for large-scale turbines being set up / major order for 200 MW secured

    Source: Xinhua, December 02, 2005
    A contract was signed in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, for launching a joint venture between the Nordex Group of Germany and two local companies of Ningxia producing megawatt-class wind turbines in China. In accordance with the contract signed Friday December 02, 2005, the German investor will bear 50 percent of the stake on the projected joint venture, while the two Chinese partners, Ningxia Electric Power Group and the Ningxia Tianjing Electric Energy Development Group, will shoulder 40 percent and 10 percent of the total investment, respectively. With a total investment of 12 million US dollars, the new joint venture will be located inside the economic and technological development zone of Yinchuan City. Nordex Wind Power Equipment Manufacturing Co. Ltd. will be assembling wind turbines with a capacity of 1.5 megawatts in Ningxia. In the beginning, the joint venture will be able to produce 200 turbines annually and the annual sales will total 1.8 billion yuan (about 222 million US dollars). It has already received its first major order of 200 MW to be constructed until 2009. The partners will be completing the first 26 turbines for China in the coming year. A number of these turbines will still be produced in Germany to provide the engineers from China with a training opportunity at main factory. The first batch of wind turbines will be ready for delivery in the fourth quarter next year.
    After the necessary production quality is secured local manufacturing content will be raised step by step. Since the end of 2005, suppliers responding to invitations for tenders in China must guarantee local manufacturing content of at least 70 percent. "We want to achieve this level swiftly," explains Thomas Richterich, CEO at Nordex AG. This will be facilitated by further wind farm projects being planned by the partners with a volume of up to 600 MW, he said. Nordex established a joint venture with Xi'an Aero Engine for the assembly of 600 kW turbines in 1998. In response to greater demand in China for large-scale turbines, Nordex has realigned its local production activities. As a result, it started up a new rotor blade production facility in Baoding in spring 2005, where it is producing components for the N60/1,300 kW series.

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