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Title: Pyroelectric energy harvesting using liquid-based switchable thermal interfaces

Abstract

The pyroelectric effect offers an intriguing solid-state approach for harvesting ambient thermal energy to power distributed networks of sensors and actuators that are remotely located or otherwise difficult to access. There have been, however, few device-level demonstrations due to challenges in converting spatial temperature gradients into temporal temperature oscillations necessary for pyroelectric energy harvesting. We demonstrate the feasibility of a device concept that uses liquid-based thermal interfaces for rapid switching of the thermal conductance between a pyroelectric material and a heat source/sink and can thereby deliver high output power density. Using a thin film of a pyroelectric co-polymer together with a macroscale mechanical actuator, we operate pyroelectric thermal energy harvesting cycles at frequencies close to 1 Hz. Film-level power densities as high as 110 mW/cm(3) were achieved, limited by slow heat diffusion across a glass substrate. When combined with a laterally interdigitated electrode array and a MEMS actuator, the present design offers an attractive option for compact high-power density thermal energy harvesters. (C) 2012 Elsevier B.V. All rights reserved.

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1211098
DOE Contract Number:  
DE-AR0000120
Resource Type:
Journal Article
Journal Name:
SENSORS AND ACTUATORS A-PHYSICAL
Additional Journal Information:
Journal Volume: 189; Journal ID: ISSN 0924-4247
Country of Publication:
United States
Language:
English

Citation Formats

Cha, G, and Ju, YS. Pyroelectric energy harvesting using liquid-based switchable thermal interfaces. United States: N. p., 2013. Web. doi:10.1016/j.sna.2012.09.019.
Cha, G, & Ju, YS. Pyroelectric energy harvesting using liquid-based switchable thermal interfaces. United States. doi:10.1016/j.sna.2012.09.019.
Cha, G, and Ju, YS. Tue . "Pyroelectric energy harvesting using liquid-based switchable thermal interfaces". United States. doi:10.1016/j.sna.2012.09.019.
@article{osti_1211098,
title = {Pyroelectric energy harvesting using liquid-based switchable thermal interfaces},
author = {Cha, G and Ju, YS},
abstractNote = {The pyroelectric effect offers an intriguing solid-state approach for harvesting ambient thermal energy to power distributed networks of sensors and actuators that are remotely located or otherwise difficult to access. There have been, however, few device-level demonstrations due to challenges in converting spatial temperature gradients into temporal temperature oscillations necessary for pyroelectric energy harvesting. We demonstrate the feasibility of a device concept that uses liquid-based thermal interfaces for rapid switching of the thermal conductance between a pyroelectric material and a heat source/sink and can thereby deliver high output power density. Using a thin film of a pyroelectric co-polymer together with a macroscale mechanical actuator, we operate pyroelectric thermal energy harvesting cycles at frequencies close to 1 Hz. Film-level power densities as high as 110 mW/cm(3) were achieved, limited by slow heat diffusion across a glass substrate. When combined with a laterally interdigitated electrode array and a MEMS actuator, the present design offers an attractive option for compact high-power density thermal energy harvesters. (C) 2012 Elsevier B.V. All rights reserved.},
doi = {10.1016/j.sna.2012.09.019},
journal = {SENSORS AND ACTUATORS A-PHYSICAL},
issn = {0924-4247},
number = ,
volume = 189,
place = {United States},
year = {2013},
month = {1}
}