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20 Aug 09
A new generation of wind turbines helps battle rising energy costs | Technology | The Guardian
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Wind turbines came back on Gregg's agenda when he realised that hot-water tank heater elements don't mind variable voltages or frequencies. "That's why we can make it cheaply and why it performs well because we are not handcuffed by the necessity to deliver 240V 50Hz," he says.
23 Jun 09
Renewable energy: Hot tub technology to the rescue? | Technology | The Guardian
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A tank with an immersion heater may be just an oversized kettle, but there are thought to be around 19m in Britain's homes, which collectively have the capacity to store huge amounts of energy as hot water. And this could be key to achieving an almost wholly renewable electricity supply.
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heaters could be switched on and off rapidly to compensate for the erratic output of wind turbines and solar panels, each heater controlled by a gadget that responds to signals sent through the electricity grid
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26 Jan 09
The Vertical Farm Project - Agriculture for the 21st Century and Beyond | www.verticalfarm.com
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