Comments on: How Effective are Small Scale Wind Turbines for Tesco Stores? http://www.windenergyplanning.com/how-effective-are-small-scale-wind-turbines-for-tesco-stores/ Renewable energy is essential to modern society - reducing harmful emissions from fossil fuels and making us more self sufficient. This site will explore what people are doing to help get us closer to a greener, renewable energy sourced world Fri, 12 Mar 2010 15:20:12 +0000 http://wordpress.org/?v=2.9 hourly 1 By: muscle relaxer http://www.windenergyplanning.com/how-effective-are-small-scale-wind-turbines-for-tesco-stores/comment-page-1/#comment-5746 muscle relaxer Thu, 10 Dec 2009 04:36:02 +0000 http://www.windenergyplanning.com/?p=1053#comment-5746 You need think about it. Despite the emails, the overwhelming evidence showing global warming is happening hasn't changed. "The e-mails do nothing to undermine the very strong scientific consensus . . . that tells us the Earth is warming, that warming is largely a result of human activity," Jane Lubchenco, who heads the National Oceanic and Atmospheric Administration, told a House committee. She said that the e-mails don't cover data from NOAA and NASA, whose independent climate records show dramatic warming. You need think about it. Despite the emails, the overwhelming evidence showing global warming is happening hasn’t changed.
“The e-mails do nothing to undermine the very strong scientific consensus . . . that tells us the Earth is warming, that warming is largely a result of human activity,” Jane Lubchenco, who heads the National Oceanic and Atmospheric Administration, told a House committee. She said that the e-mails don’t cover data from NOAA and NASA, whose independent climate records show dramatic warming.

]]> By: Vertical Axis Wind Turbine Market Continues to Expand | Wind Energy Planning http://www.windenergyplanning.com/how-effective-are-small-scale-wind-turbines-for-tesco-stores/comment-page-1/#comment-3600 Vertical Axis Wind Turbine Market Continues to Expand | Wind Energy Planning Sat, 24 Oct 2009 13:34:29 +0000 http://www.windenergyplanning.com/?p=1053#comment-3600 [...] wind turbines. In the UK, supermarket giant Tesco has installed several “Ropatec” vertical axis wind turbines with a rated capacity of [...] [...] wind turbines. In the UK, supermarket giant Tesco has installed several “Ropatec” vertical axis wind turbines with a rated capacity of [...]

]]> By: Solar Sasch http://www.windenergyplanning.com/how-effective-are-small-scale-wind-turbines-for-tesco-stores/comment-page-1/#comment-216 Solar Sasch Tue, 03 Feb 2009 02:51:18 +0000 http://www.windenergyplanning.com/?p=1053#comment-216 You nailed it on the head - simply stating that the wind turbine has a (peak) power rating of 6kW is like saying you have a fast sportscar that goes 200mph when the question wasn't how fast it go but how far did it go. With roads with speed limits chances are the car is never exceeding much beyond 60mph on average. What's important is what is the estimated energy output (kWhr and not kW) for the average wind speed for the location in question. Usually the peak power rating of a small wind turbine is assuming a 25-30mph wind - which hardly any location on the planet gets on a regular basis. Wind speed to power output of a turbine is a cubic relationship. So if this windy site only averages 10-12 mph it's likely that the turbine is produces an instantaneous power output of around 750kW. You nailed it on the head – simply stating that the wind turbine has a (peak) power rating of 6kW is like saying you have a fast sportscar that goes 200mph when the question wasn’t how fast it go but how far did it go. With roads with speed limits chances are the car is never exceeding much beyond 60mph on average. What’s important is what is the estimated energy output (kWhr and not kW) for the average wind speed for the location in question.

Usually the peak power rating of a small wind turbine is assuming a 25-30mph wind – which hardly any location on the planet gets on a regular basis. Wind speed to power output of a turbine is a cubic relationship. So if this windy site only averages 10-12 mph it’s likely that the turbine is produces an instantaneous power output of around 750kW.

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