The past five years have seen significant cost reductions in photovoltaics and a correspondingly strong increase in uptake, with photovoltaics now positioned to provide one of the lowest-cost options ...

A new six-junction solar cell, developed by NREL (National Renewable Energy Laboratory), converts 47.1% of incident light into electricity when combined with optical concentration. Indications thus ...

Scientists in China have constructed and tested a device that uses redox couples paired with a single triple-junction amorphous-silicon photoelectrode. When tested under a xenon lamp simulating one ...

Environmental engineers help determine the most sustainable energy options using systems and life cycle analysis. This allows a comparison of energy use and environmental impacts over the entire life ...

Countries bordering the North Sea are working ever more closely together to accelerate the development of wind energy. The Netherlands, Germany, Belgium and Denmark aim to be producing an annual 150 ...

Wind Engineering, Vol. 1, No. 2 (1977), pp. 141-149 (9 pages) This study compares variable speed and constant speed rotor generator systems, and shows that under certain conditions the former may ...

WHEN the General Motors Corporation announced earlier this month that it would be the first of the Big Three auto makers to market electric cars in four Western cities, the stock prices of eight ...

Energy is a complex subject, loaded with many specialized terms and a confusing array of units and inconsistent abbreviations. For example, natural gas reserves and production are usually measured in ...

Peaker Services, Inc. (PSI) recently completed acquisition of Energy Conversions, Inc. (ECI), Tacoma, Wash, a developer of natural gas conversion kits for high horsepower (HHP) diesel engine ...