Researchers from Northwestern University have discovered a material that can utilize the heat generated pollution from engine heat to produce electricity. The researchers put nanokristal rock salt (strontium tellurida, SrTe) into the lead tellurida (PbTe). This material has been shown to convert the heat produced by vehicle exhaust system (exhaust), machinery and industrial equipment that produce heat, until the sun light with efficiency that is much higher than previous similar discoveries.
Alloys of these materials show high thermoelectric characteristics and can convert 14% of heat pollution into electricity, without the need for turbine and generator system. Chemists, physicists, and materials scientists at Northwestern University collaborate to develop materials with extraordinary capabilities. Their study was published in the journal Nature Chemistry.
"This has been known for 100 years, that the semiconductor has a characteristic can convert heat into electricity directly," said Mercouri Kanatzidis, a chemistry professor at the Weinberg College of Arts and Sciences. "To make this process into an efficient process, all it takes is the right material. And we have found a recipe or a system to create a material with these characters. "
Mercouri Kanatzidis, co-author of the study together with his research team dispersing rock salt strontium nanokristal tellurida, SrTe into the material of lead (II) tellurida, PbTe. Previous experiments on investments in nanoscale materials into bulk materials has increased the efficiency of conversion of heat into electrical energy from the material of lead (II) tellurida. But the investment in nano material into it also increases the amount of spread of the electron, so that the overall conductivity of this material is reduced. In this study, the research team from Northwestern offers a model of the use of nano materials in the lead (II) tellurida to suppress the spread of the electrons and increase the percentage of conversion of heat into electrical energy of this material.
"We can use this material by connecting it with equipment that is reasonably priced with some of the power cord and can be directly used, for example to turn on the light bulb," said Vinayak Dravid, Professor of Materials and Engineering at Northwestern's McCormick School of Engineering and Applied Science and also a co-authors of this scholarly publication. "This device can make the light bulbs become more efficient by utilizing the heat generated pollution and turn it into a more useful energy as electrical energy, with the percentage of conversion of about 10 to 15 percent.
Automotive industry, chemicals, bricks, glass, and other industrial type waste a lot of heat in their production processes to make production systems more efficient by using this scientific breakthrough, and can reap more benefits, says Kanatzidis which also entered into an agreement with Argonne National Laboratory.
"The energy crisis and the environment are two main reasons for the discovery of this scientific breakthrough, but it is certainly only the beginning," said Dravid. "This type of material structure such as this can only result in another for the scientific community that we did not expect before, maybe just in the mechanics as to strengthen and improve the performance of the engine system. I hope other areas can apply these scientific breakthroughs and use it for good. "
Source:
Northwestern University. "Breakthrough in converting waste heat to electricity: Automotive, chemicals, brick and glass industries Could benefit from discovery." ScienceDaily 18 January 2011. 19 January 2011 <http://www.sciencedaily.com /releases/2011/01/110118143228.htm>.
Source image: http://www.sciencedaily.com/images/2011/01/110118143228.jpg
Alloys of these materials show high thermoelectric characteristics and can convert 14% of heat pollution into electricity, without the need for turbine and generator system. Chemists, physicists, and materials scientists at Northwestern University collaborate to develop materials with extraordinary capabilities. Their study was published in the journal Nature Chemistry.
"This has been known for 100 years, that the semiconductor has a characteristic can convert heat into electricity directly," said Mercouri Kanatzidis, a chemistry professor at the Weinberg College of Arts and Sciences. "To make this process into an efficient process, all it takes is the right material. And we have found a recipe or a system to create a material with these characters. "
Mercouri Kanatzidis, co-author of the study together with his research team dispersing rock salt strontium nanokristal tellurida, SrTe into the material of lead (II) tellurida, PbTe. Previous experiments on investments in nanoscale materials into bulk materials has increased the efficiency of conversion of heat into electrical energy from the material of lead (II) tellurida. But the investment in nano material into it also increases the amount of spread of the electron, so that the overall conductivity of this material is reduced. In this study, the research team from Northwestern offers a model of the use of nano materials in the lead (II) tellurida to suppress the spread of the electrons and increase the percentage of conversion of heat into electrical energy of this material.
"We can use this material by connecting it with equipment that is reasonably priced with some of the power cord and can be directly used, for example to turn on the light bulb," said Vinayak Dravid, Professor of Materials and Engineering at Northwestern's McCormick School of Engineering and Applied Science and also a co-authors of this scholarly publication. "This device can make the light bulbs become more efficient by utilizing the heat generated pollution and turn it into a more useful energy as electrical energy, with the percentage of conversion of about 10 to 15 percent.
Automotive industry, chemicals, bricks, glass, and other industrial type waste a lot of heat in their production processes to make production systems more efficient by using this scientific breakthrough, and can reap more benefits, says Kanatzidis which also entered into an agreement with Argonne National Laboratory.
"The energy crisis and the environment are two main reasons for the discovery of this scientific breakthrough, but it is certainly only the beginning," said Dravid. "This type of material structure such as this can only result in another for the scientific community that we did not expect before, maybe just in the mechanics as to strengthen and improve the performance of the engine system. I hope other areas can apply these scientific breakthroughs and use it for good. "
Source:
Northwestern University. "Breakthrough in converting waste heat to electricity: Automotive, chemicals, brick and glass industries Could benefit from discovery." ScienceDaily 18 January 2011. 19 January 2011 <http://www.sciencedaily.com /releases/2011/01/110118143228.htm>.
Source image: http://www.sciencedaily.com/images/2011/01/110118143228.jpg
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