High-frequency thermal-electrical cycles for pyroelectric energy conversion

Journal Article · Fri Nov 21 04:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4901993· OSTI ID:22402682

Bhatia, Bikram ^[1]; Damodaran, Anoop R. ^[2]; Cho, Hanna ^[3]; Martin, Lane W. ^[2]

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1. Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, Urbana, Illinois 61801 (United States)
2. Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois Urbana-Champaign, Urbana, Illinois 61801 (United States)
3. Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409 (United States)

We report thermal to electrical energy conversion from a 150 nm thick BaTiO{sub 3} film using pyroelectric cycles at 1 kHz. A microfabricated platform enables temperature and electric field control with temporal resolution near 1 μs. The rapid electric field changes as high as 11 × 10{sup 5 }kV/cm-s, and temperature change rates as high as 6 × 10{sup 5 }K/s allow exploration of pyroelectric cycles in a previously unexplored operating regime. We investigated the effect of phase difference between electric field and temperature cycles, and electric field and temperature change rates on the electrical energy generated from thermal-electrical cycles based on the pyroelectric Ericsson cycle. Complete thermodynamic cycles are possible up to the highest cycle rates tested here, and the energy density varies significantly with phase shifts between temperature and electric field waveforms. This work could facilitate the design and operation of pyroelectric cycles at high cycle rates, and aid in the design of new pyroelectric systems.

• OSTI ID: 22402682
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 19 Vol. 116; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONTROL
DESIGN
ELECTRIC FIELDS
ENERGY CONVERSION
ENERGY DENSITY
ERICSSON CYCLE
FILMS
PHASE SHIFT
RESOLUTION
TITANATES
WAVE FORMS