July 31st

Connecting Distributed Generation (DG) units to the network

By David Chapman & Bruno De Wachter

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July 30th

New report on Opportunities and Challenges for the concentrating photovoltaic power industry

Thanks to Belen Galego from CSPToday for pointing us to this new NREL report about the opportunities and challenges for development of a mature concentrating photovoltaic power industry. It's about 20 pages packed with interesting information.

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Replacement of existing wind turbines

Walter Hulshorst
Post date: 
Wed, 07/30/2008 - 17:33

In countries that started early with wind energy (Germany and Denmark), old wind turbines are often placed at locations where the wind is very good. Since the best locations for wind in these countries are occupied by old wind turbines with lower energy outputs compared with new wind turbines, programmes were started to replace the old turbines (5 up to 15 years old) with modern ones. With repowering, first-generation wind turbines can be replaced with modern multi-megawatt wind turbines.

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July 28th

When the price of oil goes beyond imagination our minds should follow.

The German Öko-Institute has issued a study of the German economy and the impact of high oil prices as well as oil prices that are “spiking”, i.e. oscillating between extremely high values and lower, “relaxed” values. The study aims to find out how different sectors adapt to the prices and how this adaptation affects the emission of carbon-dioxide.

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July 25th

Wind Energy Webcast

This webcast offers a short introduction to wind energy and wind technology development.

It begins with a brief overview of the physical principals of wind energy, discussing the main components of a modern wind turbine and the likely developments over the next five years. Investment and operational costs are also addressed, and it concludes with a case study of the development of a 10 MW onshore wind farm.

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Electronic ballasts are not good for outdoor applications (1)

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July 21st

Carbon-free electricity in the U.S. in ten years – Al Gore’s Kennedyian challenge requires a different perspective on economics.

Al Gore has challenged his fellow Americans, or rather their future leaders (see footnote), to take on the task of producing 100% of their electricity from renewable and truly clean, carbon-free sources within 10 years. The challenge is deliberately formatted similarly to the one John Kennedy made to put a man on the moon within a decade, but it is also a very political text in the sense that Mr. Gore provides a backdrop describing the failure of the American economy as it looks today.

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July 17th

Transformer inquiry

Would you please share with us your opion of what impact the new energy conservation program requirements (10 CFR Part 431) regarding Grain-Oriented Silicon Core Steel will have on the industry? Specifically can you tell us what kind of cost increases and lead times we should see in distribution transformers over the next 5 years? 10 years?

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Wind energy subsidies yield more than they cost

Wind energy is often criticised by competing forms of energy generation for some of its perceived aspects. It is said to cause dispatching problems, to be more expensive than fossil fuel, to have a limited global potential, and to represent a high cost to society. This last critique has now been contradicted by GE Energy Financial Services.

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July 11th

Toroidal cores

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