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Sensors 2016, 16(3), 375; doi:10.3390/s16030375

A Strip Cell in Pyroelectric Devices

1
Department of Mechanical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Rd., Sec. 4, Taipei 10607, Taiwan
2
Department of Mechanical Design Engineering, National Formosa University, No. 64, Wunhua Rd., Huwei Township, Yunlin 632, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 15 January 2016 / Revised: 26 February 2016 / Accepted: 7 March 2016 / Published: 15 March 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [8121 KB, uploaded 15 March 2016]   |  

Abstract

The pyroelectric effect affords the opportunity to convert temporal temperature fluctuations into usable electrical energy in order to develop abundantly available waste heat. A strip pyroelectric cell, used to enhance temperature variation rates by lateral temperature gradients and to reduce cell capacitance to further promote the induced voltage, is described as a means of improving pyroelectric energy transformation. A precision dicing saw was successfully applied in fabricating the pyroelectric cell with a strip form. The strip pyroelectric cell with a high-narrow cross section is able to greatly absorb thermal energy via the side walls of the strips, thereby inducing lateral temperature gradients and increasing temperature variation rates in a thicker pyroelectric cell. Both simulation and experimentation show that the strip pyroelectric cell improves the electrical outputs of pyroelectric cells and enhances the efficiency of pyroelectric harvesters. The strip-type pyroelectric cell has a larger temperature variation when compared to the trenched electrode and the original type, by about 1.9 and 2.4 times, respectively. The measured electrical output of the strip type demonstrates a conspicuous increase in stored energy as compared to the trenched electrode and the original type, by of about 15.6 and 19.8 times, respectively. View Full-Text
Keywords: pyroelectricity; energy harvesting; dicing saw; temperature variation; lateral temperature gradient pyroelectricity; energy harvesting; dicing saw; temperature variation; lateral temperature gradient
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Siao, A.-S.; Chao, C.-K.; Hsiao, C.-C. A Strip Cell in Pyroelectric Devices. Sensors 2016, 16, 375.

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