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Hemlock silicon

Thermoelectric materials hold the promise of turning waste heat into electricity, but they haven’t been widely used because of high costs. Startup Alphabet Energy says it’s solving those problems by using common silicon and has lined up $12 million to finalize its first product. Read more »

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Is the greentech industry headed for a breakout year or is it retrenching for hard times to come? The first three months of 2011 provided evidence that could support both assertions, with a big rise in venture capital investment and a big drop-off in global energy financing. Solar power remained the largest green technology sector in terms of venture capital investment, while in the world of electric vehicles, GM’s Chevy Volt hybrid and Nissan’s all-electric Leaf — the first two mainstream plug-in vehicles — hit the showroom floors in significant numbers. Meanwhile the smart grid sector’s relative dearth of VC investment was more than made up for by the massive round of acquisitions. Companies mentioned in this report include NRG Energy, Microsoft, Silver Spring Networks, Tesla and BrightSource Energy. For a full list of companies, and to read the full report, sign up for a free trial. Read more at GigaOM Pro »

Refrigeration

Thermoelectric startup Phononic Devices has landed a $10 million investment to work on its technology to convert heat into electricity, or vice versa. There’s a big market for thermoelectrics that are cheap and reliable enough. Read more »

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Startup Alphabet Energy, which is developing materials and devices that convert waste heat into usable electricity, told me this week that by 2012 they will deliver products to customers and throughout 2011 will be moving from the lab into the factory. Read more »

Here’s an interesting take on green data centers: servers that use thermoelectrics to turn their own waste heat into power. Applied Methodologies Inc. has been working on the concept since 2007. Read more »

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