High-frequency thermal-electrical cycles for pyroelectric energy conversion
Abstract
We report thermal to electrical energy conversion from a 150 nm thick BaTiO3 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 × 105 kV/cm-s, and temperature change rates as high as 6 × 105 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 21, 2014
- Source ID
- 10.1063/1.4901993
Entities
People
- Anoop R Damodaran
- Bikram Bhatia
- Hanna Cho
- Lane W Martin
- William P King
Organizations
- Army Research Office
- Texas Tech University
- University of California
- University of Illinois Urbana–Champaign