Kumar Anuruddh, Kumar Rajeev, Chandra Jain Satish, Vaish Rahul
School of Engineering, Indian Institute of Technology Mandi Himachal Pradesh 175001 India
RSC Adv. 2019 Jan 29;9(7):3918-3926. doi: 10.1039/c8ra07887d. eCollection 2019 Jan 25.
In this study, the bi-functional performance of a small-scale piezoelectric cantilever, which coupled piezoelectric and elastocaloric phenomena in a single device to produce energy harvesting as well as refrigeration effects due to vibration, has been investigated. Finite element modeling has been used to examine the performance of the device. The basic structure of the device is a cantilever that vibrates between two thermal bodies (hot and cold). The properties of BaTiO (single crystal) were used to examine the bi-functional performance of piezoelectric cantilevers. In this study, different cases have been investigated, which are based on a number of cantilevers between hot and cold thermal bodies. When the number of cantilevers is one, the net cooling is 0.3 K and the power is 0.03 μW, while for four cantilevers, the net cooling is 1.2 K and 0.13 μW of power is produced. The results show that as we increase the number of cantilevers, a greater refrigeration effect is produced and higher power across the electrical load is achieved.
在本研究中，对一种小型压电悬臂梁的双功能性能进行了研究，该悬臂梁在单个器件中耦合了压电和弹性热现象，以产生能量收集以及由于振动引起的制冷效果。有限元建模已被用于研究该器件的性能。该器件的基本结构是一个在两个热体（热体和冷体）之间振动的悬臂梁。使用BaTiO（单晶）的特性来研究压电悬臂梁的双功能性能。在本研究中，基于热体和冷体之间的悬臂梁数量研究了不同的情况。当悬臂梁数量为1时，净制冷量为0.3 K，功率为0.03 μW，而对于四个悬臂梁，净制冷量为1.2 K，产生的功率为0.13 μW。结果表明，随着悬臂梁数量的增加，会产生更大的制冷效果，并且在电负载上实现更高的功率。
