At least two-thirds of the energy in gasoline used in cars and trucks is wasted as heat. Thermoelectrics, semiconductor materials that convert heat into electricity, could capture this waste heat, reducing the fuel needs of the vehicle and improving fuel economy by at least 5 percent. But the low efficiency and high cost of existing thermoelectric materials has kept such devices from becoming practical in vehicles. The DOE (Dept of Energy) is targeting getting 10% of more improvement in fuel efficiency.
An alloy of lead telluride (PbTe) has been boosted to 22% efficient at converting heat to electricity
BSST is using thermoelectrics—blends of hafnium and zirconium thave increased the generator efficiency by about 40 percent over Bismuth telluride.
BSST and GM researchers also need to find ways to make larger volumes of the new materials cheaply, but it might be at least another four years before thermoelectric generators make it into production vehicles.
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Wang is a prolific business-oriented writer of emerging and disruptive technologies. He is known for insightful articles that combine business and technical analysis that catches the attention of the general public and is also useful for those in the industries. He is the sole author and writer of nextbigfuture.com
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He gave the recent keynote presentation at Monte Jade event with a talk entitled the Future for You. He gave an annual update on molecular nanotechnology at Singularity University on nanotechnology, gave a TEDX talk on energy, and advises USC ASTE 527 (advanced space projects program). He has been interviewed for radio, professional organizations. podcasts and corporate events. He was recently interviewed by the radio program Steel on Steel on satellites and high altitude balloons that will track all movement in many parts of the USA.
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