Barry Melek Electric Train Sets

Scale Rooftop

Wind Turbines - what to consider when installing on rooftops and buildings

Domestic, small scale, roof mounted wind turbines have a huge potential to contribute to localised electricity production, able to be installed on almost all varieties of roofs anywhere; although the degree of benefits associated will vary, depending on both the type chosen and location to which they are sited.

There are however a number of downsides to these small scale micro wind turbines, these are:

Vibration - As wind turbine consists of moving parts, this causes a degree of vibration to occur, which if mounted on the roof, is transmitted through to the building below, causing undue stresses.

Turbulence - Air passing over a building is distorted, resulting in cylindrical air movements. This interferes with the wind turbines normal operation resulting in increased stress and lower energy capture. This can be avoided however, if installed significantly above the roofline; however this is much more complicated and may negate any financial benefits. Or a sophisticated dampening system may be adopted, which separates the turbine from the building structure.

Safety – Turbines installed on roofs are a particular health and safety hazard, with higher risks associated due to their placement within close proximity to occupants.  Their fixings need to be strong enough to withstand high wind levels, and noise levels minimised.

Efficiency – The majority of residents currently live in built up urban locations, which are sheltered areas, and consequently experience high degree of intermittent wind speeds. The average wind speed in a town or city is generally a lot less than for the same turbine in a rural and open location.

Financially these turbines are not currently viable for the mass market, however with increased grants becoming available, this situation may be changing, and if the price is cheap enough, these issues mentioned above may not necessarily be a problem.

The cost effectiveness may be increased through clever use of energy storage from the turbines, such as an electric immersion heating element in a water tank may be used, reducing the impact of intermittent electricity production, and making it more viable a source to meet a home’s energy needs.

Although this article emphasises generally negative aspects of wind turbines, it needs to be appreciated, that presuming that are installed correctly, they can provide signficant cost savings, contributing significantly to Homeowners annual energy bill. More information found on Wind Turbines here.

About the Author

This article was produced by joeknight at www.energy-measures.com

Rooftop $3.94 Cousins Clay and Addison were like brothers, growing up together in the projects, until they were ripped apart by a family argument. when they are reunited in a drug-treatment program, they try to work out their issues like a family. but one night, one wrong decision, leaves Clay shaken and Addison dead. And in the rash of events that follow, the truth of what actually happened on the rooftop of the apartment building is caught up in a clash of politics and racial issues. will Clay be able to rise above the lies and face the truth?

Rooftop: $3.94 Clay is committed to cleaning up his act. He's at Daytop, a drug treatment facility, working towards getting his GED and kicking his drug habit. Then one day his estranged cousin, Addison, shows up at the program. Addison's a bigger, bolder version of Clay: he's older, he's into harder drugs, and he's in more trouble.That trouble comes to a head one tragic night on a rooftop when Addison is shot by the police as Clay stands just a few steps away. Addison wasn't armed. He didn't deserve to die. But was he completely innocent? And what will prove more difficult for Clay--living a lie, or facing the truth?

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