Thermal energy harvesting through pyroelectricity

被引:267
作者
Cuadras, A. [1 ]
Gasulla, M. [1 ]
Ferrari, V. [2 ]
机构
[1] Univ Politecn Cataluna, Escola Politecn Super Castelldefels, Instrumentat Sensors & Interfaces Grp, Castelldefels 08860, Spain
[2] Univ Brescia, Dept Elect Automat, I-25123 Brescia, Italy
关键词
Pyroelectric sensor; Energy harvesting; PZT; PVDF; PZT; CONVERSION; FILMS;
D O I
10.1016/j.sna.2009.12.018
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Pyroelectric cells based on fabricated screen-printed PZT and commercial PVDF films are proposed as thermal energy harvesting sources in order to supply low-power autonomous sensors. The cells are electrically modelled as a current source in parallel with output impedance. Heating and cooling temperature fluctuations generated by air currents were applied to the pyroelectric converters. The generated currents and charges were respectively in the order of 10(-7) A and 10(-5) C for temperature fluctuations from 300 K to 360 K in a time period of the order of 100 s, which agrees with the theoretical model. Parallel association of cells increased the generated current. The dependence of the generated current on relevant technological parameters has been also characterized. Finally, current from cyclic temperature fluctuations was rectified and stored in a 1 mu F load capacitor. Energies up to 0.5 mJ have been achieved, enough to power typical autonomous sensor nodes during a measurement and transmission cycle. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:132 / 139
页数:8
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