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Self sustained thermally induced gas-damped oscillations of bimetal cantilevers with application to the design of a new pyroelectric micro energy harvester
Journal of Physics D: Applied Physics ( IF 3.4 ) Pub Date : 2020-02-28 , DOI: 10.1088/1361-6463/ab70ca
Tarek Gebrael 1 , Ali Kanj 1 , Daniel Farhat 2 , Mutasem Shehadeh 2 , Issam Lakkis 2
Affiliation  

Low efficiency is the main drawback of many MEMS thermal energy harvesters. Recently, energy harvesting micro-devices that operate using the pyroelectric effect gained attention due to their potential superior performance. Operation of these devices is based on the cyclic motion of a pyroelectric capacitor that operates between a high temperature and a low temperature reservoirs. In this paper, we investigate the dynamics of oscillations of a pyroelectric capacitor self sustained by thermally actuated bimetal micro-cantilevers, a topic which is so far under investigated. In addition to highlighting key thermodynamic aspects of the operation, we explore conditions for self-sustained oscillations and discuss the viability of operation at the mechanical resonance frequency. The analysis is presented for a new design inspired by the device proposed in Hunter et al (2011 SPIE Defense, Security, and Sensing (International Society for Optics and Photonics) p 80350V); Hunt...

中文翻译:

双金属悬臂的自持热诱导气体阻尼振荡及其在新型热电微能量采集器设计中的应用

低效率是许多MEMS热能采集器的主要缺点。近来,利用热释电效应工作的能量收集微设备由于其潜在的优越性能而受到关注。这些设备的操作基于热电电容器的循环运动,该热电电容器在高温和低温容器之间工作。在本文中,我们研究了热致动双金属微悬臂自身维持的热释电电容器的振荡动力学,这是目前尚在研究的主题。除了突出显示操作的关键热力学方面之外,我们还探讨了自持振荡的条件,并讨论了在机械共振频率下操作的可行性。提出的分析是受Hunter等人(2011 SPIE国防,安全和传感(国际光学和光子学会)p 80350V)提出的设备启发而设计的新设计;打猎...
更新日期:2020-02-28
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