Harvesting heat produced by a car\u2019s engine which would otherwise be wasted and using it to recharge the car\u2019s batteries or powering the air-conditioning system could be a significant feature in the next generation of hybrid cars.<\/p>\n
The average car currently loses around 70% of energy generated through fuel consumption to heat. Utilising that lost energy requires a thermoelectric material which can generate an electrical current from the application of heat.<\/p>\n
These thermoelectric materials convert heat to electricity or vice-versa, such as with refrigerators. The challenge with these devices is to use a material that is a good conductor of electricity but also dissipates heat well.<\/p>\n
Currently, materials which exhibit these properties are often toxic and operate at very high temperatures. By adding graphene, a new generation of composite materials could reduce carbon emissions globally from car use.<\/p>\n
The team from the University and European Thermodynamics Ltd led by Prof Ian Kinloch, Prof Robert Freer and Yue Lin, added a small amount of graphene to strontium titanium oxide. The resulting composite was able to convert heat which would otherwise be lost as waste into an electric current over a broad temperature range, going down to room temperature.<\/p>\n
Prof Freer said:<\/p>\n
The new material will convert 3\u20135% of the heat into electricity. That is not much but, given that the average vehicle loses roughly 70% of the energy supplied to it by its fuel to waste heat and friction, recovering even a small percentage of this with thermoelectric technology would be worthwhile.<\/p><\/blockquote>\n
The findings were published in the journal ACS Applied Materials and Interfaces. Graphene\u2019s range of superlative properties and small size causes the transfer of heat through the material to slow leading to the desired lower operating temperatures.<\/p>\n
Improving fuel efficiency, whilst retaining performance, has long been a driving force for car manufacturers. Graphene could also aid fuel economy and safety when used as a composite material in the chassis or bodywork to reduce weight compared to traditional materials used.<\/p>\n
Graphene was first isolated at The University of Manchester in 2004 by Sir Andre Geim and Sir Kostya Novoselov, earning them the Nobel Prize for Physics in 2010. The University is the home of graphene research with over 40 industrial partners working on graphene-related projects through the \u00a361m National Graphene Institute.<\/p>\n","protected":false},"excerpt":{"rendered":"
Researchers at The University of Manchester have teamed up with experts at European Thermodynamics to increased the potential for low cost thermoelectric materials to be used more widely in the automotive industry. Harvesting heat produced by a car\u2019s engine which would otherwise be wasted and using it to recharge the car\u2019s batteries or powering the air-conditioning system could be a significant feature in the next generation of hybrid cars. The average car currently loses around 70% of energy generated through […]<\/p>\n","protected":false},"author":2,"featured_media":13571,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[512,891],"tags":[608,75],"class_list":["post-13568","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-composites-news","category-research","tag-graphene","tag-uk"],"yoast_head":"\n
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