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New Wind Turbine Blade Design

May 18th, 2011|Categories: Energy, News, Renewable Energy, Wind Energy|Tags: , , , , |

[singlepic id=627 w=320 h=240 float=right]ALBUQUERQUE, N.M. — A new wind turbine blade design that researchers at Sandia National Laboratories developed in partnership with Knight & Carver (K&C) of San Diego promises to be more efficient than current designs. It should significantly reduce the cost-of-energy (COE) of wind turbines at low-wind-speed sites. Named “STAR” for Sweep Twist Adaptive Rotor, the blade is the first of its kind produced at a utility-grade size. Its most distinctive characteristic [...]

More Energy with Less Weight

May 18th, 2011|Categories: Energy, News, Renewable Energy, Wind Energy|Tags: , , , |

The following is from an article published in WindStats Newsletter Vol. 19, No. 4. The complete article is available from WindStats at: http://www.windstats.com. "It comes as no surprise that much of today's wind power research focuses on increasing blade lengths. The weight of a rotor can take up as much as 77% of the total weight of a system, says John Locke, a researcher at Wichita State University's National Institute for Aviation Research. Yet, according [...]

InAs Quantum Dot Transitions

April 5th, 2011|Categories: EC, Energy, Energy Efficiency, News, Solid-State Lighting|Tags: , , , , , , |

March 1, 2011[singlepic id=364 w=320 h=240 float=right] The fundamental interaction governing light emission from semiconductor materials is the coupling between electronic states in the semiconductor and a local electromagnetic field. The current generation of solid-state lighting devices operates in the so-called “weak-coupling” regime, in which the rate of energy transfer between the electronic states and the local electromagnetic field is lower than the rates at which these states or fields relax. For a possible future [...]