Some devices have been proposed from regenerator and refrigeration application viewpoints. 15–17 Almost the whole family of ferroelectric materials has been investigated from an electrocaloric viewpoint. Another emerging area is solid state refrigeration, where the electrocaloric effect associated with ferroelectric materials has been extensively investigated in the last couple of years. Among those reported in the literature, the simplest design that has been widely studied is cantilever-based energy harvesting. 11–14 These devices have shown interesting performance properties from the microscale to the macroscale. 5–10 Large numbers of devices have been proposed theoretically and a few prototypes have also been fabricated on the laboratory scale. 1–4 In the last decade, the piezoelectric effect has also been well explored for energy harvesting applications. These materials have also shown promising results in other emerging fields, such as photovoltaics and photocatalysis. Introduction Piezoelectric materials are known for their sensing and actuation applications. 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. 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. In this study, different cases have been investigated, which are based on a number of cantilevers between hot and cold thermal bodies. The properties of BaTiO 3 (single crystal) were used to examine the bi-functional performance of piezoelectric cantilevers. The basic structure of the device is a cantilever that vibrates between two thermal bodies (hot and cold). Finite element modeling has been used to examine the performance of the device. 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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |