2005_deer_bell

2005_deer_bell - Role of Thermoelectrics Thermoelectrics in...

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Role of Role of Thermoelectrics Thermoelectrics in in Vehicle Efficiency Increase Vehicle Efficiency Increase Lon Bell BSST LLC 11th Diesel Engine Emissions Reduction (DEER) Conference August 21-25, 2005 Chicago, Illinois
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2005 DEER Conference 2 Market Forces are Changing Market Forces are Changing Emissions reductions are being introduced worldwide Great external pressures to increase fuel economy • Customer demands to reduce operating costs • Customer concerns with fuel supply availability and possible needs for fuel allocation • Government demands for fuel economy increase/CO 2 reduction It may not be acceptable to throw away power contained in vehicle exhaust
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2005 DEER Conference 3 Why Thermoelectrics? Why Thermoelectrics? Solid-state cooling, heating and power generation Small, light-weight. Potentially very reliable and rugged Electrically powered with very few (or no) moving parts Distributed (and spot) cooling/heating/temperature control No gaseous pollutants Waste power recovery easily adaptable to varied form factors and thermal power influx
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4 What Has Limited Usage? What Has Limited Usage? Power g eneration efficiency has been less than 5% Inadequate for many high-power applications Limits usage to small applications Too inefficient for auxiliary power generation and automotive use Thermal flux density has been low Volume and weight too great at high power levels Form factor not readily adaptable to some application needs Poor interface to high-power density applications Lack of design knowledge and effective simulation tools Performance often poorer than predicted
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2005_deer_bell - Role of Thermoelectrics Thermoelectrics in...

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