Thermo Electric Generators - Revision history

Ranisha at 09:45, 22 January 2016

2016-01-22T09:45:35Z

Ranisha: /* Further Information */

2014-07-30T15:35:26Z

‎Further Information

Wiki Gardener at 14:23, 24 July 2013

2013-07-24T14:23:17Z

Katharina Wiedemann at 09:46, 26 April 2012

2012-04-26T09:46:12Z

JanS at 09:37, 26 April 2012

2012-04-26T09:37:24Z

JanS at 09:32, 26 April 2012

2012-04-26T09:32:51Z

Katharina Wiedemann at 09:30, 26 April 2012

2012-04-26T09:30:08Z

JanS at 09:25, 19 September 2011

2011-09-19T09:25:49Z

JanS at 09:07, 19 September 2011

2011-09-19T09:07:42Z

JanS at 09:23, 22 May 2011

2011-05-22T09:23:26Z

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 = Overview =
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 <references />
 [[Category:Biogas]]

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 <br/>
 = Further Information<br/> =
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 *Homepage of [http://www.centrovolta.org/ECT2010/ ECT 2010]
 *[http://www.peltier-info.com Link collection on TEG producers, consultants, products....]
+*[[Portal:Solar|Portal:Solar]]<br/>

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-= How it works<br/> =
+= How it Works<br/> =
 '''Termo Electric Generators (TEGs) '''consist of two materials placed in contact with each other via bridges. Electricity can then be generated if there is a temperature difference between the two materials and the heat begins to move from one side to the other. (Learn more about the [http://en.wikipedia.org/wiki/Thermoelectric_effect thermoelectric effect])
@@ Line 11: / Line 14: @@
 <u>Two general problems exist in such devices</u>: high output resistance and adverse thermal characteristics. In order to get a significant output voltage a very high Seebeck coefficient is needed (high V/°C). A common approach is to place many thermo-elements in series, causing the effective output resistance of a generator to be very high (>10kOhm). Thus power is only efficiently transferred to loads with high resistance; power is lost across the output resistance otherwise. A generator with very high output impedance is effectively a temperature sensor, not a generator. Secondly, because low thermal conductivity is required for a good TEG, this can severely dampen the heat dissipation of such a device. For example it is not generally considered wise to place a TEG on an essential IC chip that requires cooling. Because of the low thermal conductivity of a TEG device, that IC is cooled at a slower rate.
-TEGs' typical efficiencies are around 5-10%. A lot of research has been done to make this technology efficient. Together with the Fraunhofer Institut [http://www.sam-tetec.com SAM-Thermoelectric technologies] have developed a way to generate electricity at 30% efficiancy [http://www.sam-tetec.com/products/pdf/SAM-Productinformation.pdf (see product description PDF)].&nbsp;
+TEGs' typical efficiencies are around 5-10%. A lot of research has been done to make this technology efficient. Together with the Fraunhofer Institut [http://www.sam-tetec.com SAM-Thermoelectric technologies] have developed a way to generate electricity at 30% efficiancy [http://www.sam-tetec.com/products/pdf/SAM-Productinformation.pdf (see product description PDF)].
-= Uses of TEGs =
+= Uses of Termo Electric Generators (TEGs) =
 == TEGs in Improved Stoves<br/> ==
-TEGs are an interesting way to improve '''Improved Cookstoves (ICS)''' performance. For example Aprovecho and Biolite have attached a TEG driven fan to a rocket stove. The [http://www.vrac.iastate.edu/ethos/files/ethos2010/Saturday/Stoves,%20Electricity,%20and%20Heat%20Transfer/Side-Feed%20Fan%20Stove_MacCarty%20Cedar.pdf Side Feed Fan Stove] has shown significant results by reducing fuel use by 42%, PM emission by 94%, and CO emissions by 91% compared to three-stone fire.The improved combustion is achieved by returning waste heat into the system and improving the airstream inside the stove.
+TEGs are an interesting way to improve '''Improved Cookstoves (ICS)''' performance. For example Aprovecho and Biolite have attached a TEG driven fan to a rocket stove. The [http://www.vrac.iastate.edu/ethos/files/ethos2010/Saturday/Stoves, Electricity, and Heat Transfer/Side-Feed Fan Stove_MacCarty Cedar.pdf Side Feed Fan Stove] has shown significant results by reducing fuel use by 42%, PM emission by 94%, and CO emissions by 91% compared to three-stone fire.The improved combustion is achieved by returning waste heat into the system and improving the airstream inside the stove.
 Another example is the [[Stove by Philips|Philips stove]] mentioned as example (F) in a [http://www.pciaonline.org/files/Stoves_Paper_Final_Color_2.26.09.pdf stove study] published on pciaonline.org in 2009. The study shows results of stove tests. The philips stove is also equipped with a TEG driven Fan and has shown great results in respect to particle and CO emission (see graphs on pages 16 and 19 of the study).
@@ Line 23: / Line 26: @@
 Small TEGs could also be used to improve the working conditions at the cooking place for example by additional lighting with LEDs. (see page 19 of the Side Feed Fan Stove presentation linked above, to see how much light you could get out of a single candle)
+<br/>
 == TEGs in Solar Systems, Engines and other Appliances<br/> ==
@@ Line 29: / Line 32: @@
 A license has been purchased by the [http://www.o-flexx.com O-Flexx GmbH] from the above mentioned [http://www.sam-tetec.com SAM-Thermoelectric technologies] company. They are now developing very promising ways to improve different technologies by converting waste heat into electricity. The SAM TEGs are beeing used to increase the efficiancy of solar systems, automotive engines, transport and more.. [http://www.o-flexx.com/Products-Solutions.21+M52087573ab0.0.html (see their products and solutions)]. They also receive funding from the german government for their improvement of solar panels. These big appliances with the SAM Technology will be commercially launched by end of 2010.
+== TEGs in Biogas Appliances<br/> ==
-== TEGs in Biogas appliances<br/> ==
 TEGs are currently being tested as add-on for biogas cookers. Similar to the idea with woodfuel stoves the TEG would produce electricity to charge a mobile phone or provide light during the cooking process.
+<br/>
 === Combining Benefits ===
-Rather then just developing with a focus on just one technology, developers are more looking into combining TEGs with other technologies such as [[Solar Thermal Technologies#Solar_Water_Heaters_.28SWH.29|solar water heaters]] and PV Panels to increase efficiency and to make these technologies economically more viable. At [http://web.mit.edu/ Massachusetts Institute of Technology (MIT)] a flat panel hat been developed that combines solar water heating with electricity generation. This combination and a new light absorbing surface resulted in a panel that is claimed to be 7-8 times more efficient than previous solar-thermal electric devices.
+Rather then just developing with a focus on just one technology, developers are more looking into combining TEGs with other technologies such as [[Solar Thermal Technologies#Solar Water Heaters .28SWH.29|solar water heaters]] and PV Panels to increase efficiency and to make these technologies economically more viable. At [http://web.mit.edu/ Massachusetts Institute of Technology (MIT)] a flat panel hat been developed that combines solar water heating with electricity generation. This combination and a new light absorbing surface resulted in a panel that is claimed to be 7-8 times more efficient than previous solar-thermal electric devices.
 [http://www.renewableenergyworld.com/rea/news/article/2011/05/mit-showcases-new-way-of-turning-suns-heat-into-electricity www.renewableenergyworld.com/rea/news/article/2011/05/mit-showcases-new-way-of-turning-suns-heat-into-electricity]
@@ Line 45: / Line 48: @@
 [http://www.sciencedaily.com/releases/2011/05/110501183821.htm www.sciencedaily.com/releases/2011/05/110501183821.htm]
+<br/>
 == TEGs as Cooling Devices<br/> ==
@@ Line 51: / Line 54: @@
 As Jean-Charles Peltier showed in 1834 the effect of thermoelectrics is versatile. Connecting a '''termo electric (TE) '''module to a low voltage will actively move heat from one side to the other ([http://en.wikipedia.org/wiki/Thermoelectric_effect#Peltier_effect Peltier effect]).
+= Further Information<br/> =
-= Further Reading<br/> =
 *[http://www.micropower-global.com/technology/breakthrough_in_performance/ Micropower] claims to have modules with 20-30% efficiency to provide power at 1-2$/Watt
-*[http://ect2007.its.org/system/files/u1/pdf/30.pdf Calculations about the efficiency of a TEG&nbsp;in a car]
+*[http://ect2007.its.org/system/files/u1/pdf/30.pdf Calculations about the efficiency of a TEG in a car]
-*Announcement (and later) proceedings [http://ect2011.physics.auth.gr/ ECT&nbsp;2011]
+*Announcement (and later) proceedings [http://ect2011.physics.auth.gr/ ECT 2011]
 *Homepage of [http://www.centrovolta.org/ECT2010/ ECT 2010]
 *[http://www.peltier-info.com Link collection on TEG producers, consultants, products....]
-[[Category:Biogas]]
-[[Category:Cooking_Energy]]
-[[Category:Cookstoves]]
+= References =
-[[Category:Cooling]]
 [[Category:Thermoelectric_Generators_(TEG)]]

@@ Line 27: / Line 27: @@
 == TEGs in Solar Systems, Engines and other Appliances<br/> ==
-A license has been purchased by the [http://www.o-flexx.com O-Flexx GmbH] from the above mentioned [http://www.sam-tetec.com SAM-Thermoelectric technologies] company. They are now developing very promising ways to improve different technologies by converting waste heat into electricity. The SAM TEGs are beeing used to increase the '''efficiancy of solar systems, automotive engines, transport and more'''.. [http://www.o-flexx.com/Products-Solutions.21+M52087573ab0.0.html (see their products and solutions)]. They also receive funding from the german government for their improvement of solar panels. These big appliances with the SAM Technology will be commercially launched by end of 2010.
+A license has been purchased by the [http://www.o-flexx.com O-Flexx GmbH] from the above mentioned [http://www.sam-tetec.com SAM-Thermoelectric technologies] company. They are now developing very promising ways to improve different technologies by converting waste heat into electricity. The SAM TEGs are beeing used to increase the efficiancy of solar systems, automotive engines, transport and more.. [http://www.o-flexx.com/Products-Solutions.21+M52087573ab0.0.html (see their products and solutions)]. They also receive funding from the german government for their improvement of solar panels. These big appliances with the SAM Technology will be commercially launched by end of 2010.
@@ Line 34: / Line 34: @@
 TEGs are currently being tested as add-on for biogas cookers. Similar to the idea with woodfuel stoves the TEG would produce electricity to charge a mobile phone or provide light during the cooking process.
@@ Line 41: / Line 39: @@
 === Combining Benefits ===
-Rather then just developing with a focus on just one technology, developers are more looking into combining TEGs with other technologies such as [[Solar Thermal Technologies#Solar_Water_Heaters_.28SWH.29|solar water heaters]] and PV Panels to increase efficiency and to make these technologies economically more viable. At [http://web.mit.edu/ '''Massachusetts Institute of Technology (MIT)''']a flat panel hat been developed that combines solar water heating with electricity generation. This combination and a new light absorbing surface resulted in a panel that is claimed to be 7-8 times more efficient than previous solar-thermal electric devices.
+Rather then just developing with a focus on just one technology, developers are more looking into combining TEGs with other technologies such as [[Solar Thermal Technologies#Solar_Water_Heaters_.28SWH.29|solar water heaters]] and PV Panels to increase efficiency and to make these technologies economically more viable. At [http://web.mit.edu/ Massachusetts Institute of Technology (MIT)] a flat panel hat been developed that combines solar water heating with electricity generation. This combination and a new light absorbing surface resulted in a panel that is claimed to be 7-8 times more efficient than previous solar-thermal electric devices.
 [http://www.renewableenergyworld.com/rea/news/article/2011/05/mit-showcases-new-way-of-turning-suns-heat-into-electricity www.renewableenergyworld.com/rea/news/article/2011/05/mit-showcases-new-way-of-turning-suns-heat-into-electricity]
 [http://www.sciencedaily.com/releases/2011/05/110501183821.htm www.sciencedaily.com/releases/2011/05/110501183821.htm]
 == TEGs as Cooling Devices<br/> ==
-As Jean-Charles Peltier showed in 1834 the effect of thermoelectrics is versatile. Connecting a TE module to a low voltage will actively move heat from one side to the other ([http://en.wikipedia.org/wiki/Thermoelectric_effect#Peltier_effect Peltier effect]).
+As Jean-Charles Peltier showed in 1834 the effect of thermoelectrics is versatile. Connecting a '''termo electric (TE) '''module to a low voltage will actively move heat from one side to the other ([http://en.wikipedia.org/wiki/Thermoelectric_effect#Peltier_effect Peltier effect]).
@@ Line 60: / Line 61: @@
 *[http://www.peltier-info.com Link collection on TEG producers, consultants, products....]
 [[Category:Cooking_Energy]]
 [[Category:Cookstoves]]
 [[Category:Cooling]]
-[[Category:Thermoelectric Generators (TEG)]]
+[[Category:Thermoelectric_Generators_(TEG)]]

← Older revision		Revision as of 09:37, 26 April 2012
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	A license has been purchased by the [http://www.o-flexx.com O-Flexx GmbH] from the above mentioned [http://www.sam-tetec.com SAM-Thermoelectric technologies] company. They are now developing very promising ways to improve different technologies by converting waste heat into electricity. The SAM TEGs are beeing used to increase the '''efficiancy of solar systems, automotive engines, transport and more'''.. [http://www.o-flexx.com/Products-Solutions.21+M52087573ab0.0.html (see their products and solutions)]. They also receive funding from the german government for their improvement of solar panels. These big appliances with the SAM Technology will be commercially launched by end of 2010.		A license has been purchased by the [http://www.o-flexx.com O-Flexx GmbH] from the above mentioned [http://www.sam-tetec.com SAM-Thermoelectric technologies] company. They are now developing very promising ways to improve different technologies by converting waste heat into electricity. The SAM TEGs are beeing used to increase the '''efficiancy of solar systems, automotive engines, transport and more'''.. [http://www.o-flexx.com/Products-Solutions.21+M52087573ab0.0.html (see their products and solutions)]. They also receive funding from the german government for their improvement of solar panels. These big appliances with the SAM Technology will be commercially launched by end of 2010.
		+
		+
		+
		+	== TEGs in Biogas appliances<br/> ==
		+
		+	TEGs are currently being tested as add-on for biogas cookers. Similar to the idea with woodfuel stoves the TEG would produce electricity to charge a mobile phone or provide light during the cooking process.
		+
		+


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	As Jean-Charles Peltier showed in 1834 the effect of thermoelectrics is versatile. Connecting a TE module to a low voltage will actively move heat from one side to the other ([http://en.wikipedia.org/wiki/Thermoelectric_effect#Peltier_effect Peltier effect]).		As Jean-Charles Peltier showed in 1834 the effect of thermoelectrics is versatile. Connecting a TE module to a low voltage will actively move heat from one side to the other ([http://en.wikipedia.org/wiki/Thermoelectric_effect#Peltier_effect Peltier effect]).
−

@@ Line 47: / Line 47: @@
 <br>
-= Further reading<br> =
+= Further reading<br/> =
-[http://www.micropower-global.com/technology/breakthrough_in_performance/  micropower] claims to have modules with 20-30% efficiency to provide power at 1-2$/Watt<br>
+[http://www.micropower-global.com/technology/breakthrough_in_performance/ micropower] claims to have modules with 20-30% efficiency to provide power at 1-2$/Watt
-[http://ect2007.its.org/system/files/u1/pdf/30.pdf Calculations about the efficiency of a TEG&nbsp;in a car]<br>
+[http://ect2007.its.org/system/files/u1/pdf/30.pdf Calculations about the efficiency of a TEG&nbsp;in a car]
-Announcement (and later) proceedings [http://ect2011.physics.auth.gr/ ECT&nbsp;2011]<br>
+Announcement (and later) proceedings [http://ect2011.physics.auth.gr/ ECT&nbsp;2011]
 Homepage of [http://www.centrovolta.org/ECT2010/ ECT 2010]
-<br>
+[http://www.peltier-info.com/manufacturers.html List of TEG producers]
 [[Category:Solar]] [[Category:Cooking]]

@@ Line 37: / Line 37: @@
 [http://www.renewableenergyworld.com/rea/news/article/2011/05/mit-showcases-new-way-of-turning-suns-heat-into-electricity www.renewableenergyworld.com/rea/news/article/2011/05/mit-showcases-new-way-of-turning-suns-heat-into-electricity]<br>
 [http://www.sciencedaily.com/releases/2011/05/110501183821.htm www.sciencedaily.com/releases/2011/05/110501183821.htm]
 == TEGs as cooling devices  ==
@@ Line 45: / Line 45: @@
 <br>
 <br>
 [[Category:Solar]] [[Category:Cooking]]