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温差发电器可将废热转化为能量 - China Medical Device Manufacturer
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Fri, January 19th, 2018

2008年1/2月CMDM电子快讯 » 技术新知
温差发电器可将废热转化为能量

Nextreme公司生产的温差发电器可装入植入式器械中,在医疗应用中可用来控制局部温度。
微型薄膜温差发电器(TEG) 可将热能直接转化为电能。据生产商Nextreme公司(美国北卡罗莱纳州, Research Triangle Park)介绍,TEG的功率密度最高可达3 W/cm2,其性能超过散装材料,且尺寸规格与同类散装材料相比小20倍。

这种小型产品可装入诸如探针、导管及手术工具等器械中,用于精确定位的局部加热或冷却。TEG 能转化废热,因此可将其整合到植入式器械中。TEG 还能缓解病痛,可用于疼痛护理、癌症治疗及药物注射等领域。它还可以维持局部温度。TEG的影响范围在0.3 0.3至 20 20 mm2之间。该产品可采用稳定或循环工作,对身体的特定区域进行微尺度热量控制。

Nextreme公司首席技术官Seri Lee称:在热量充足的环境中,不超过一片纸屑大小的设备可产生高达300 mW的能量。在热能较低的环境中,我们可以获得微瓦级的能量这足以为远程传感器及其它分布式设备提供足够的能量。

TEG设备利用塞贝克效应产生电能,即通过其表面的温差产生电能。经证实,当温差为70 K时,该产品的输出功率高于100 mW;当温差为120 K时,其输出功率达300 mW以上。TEG带有体积为 3.5 3.5 mm2的模块,输出功率密度约为13 W/cm2


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