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Solid-state cooling line based on the electrocaloric effect

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2 Author(s)
Khodayari, A. ; Mech. Dept., Razi Univ., Kermanshah, Iran ; Mohammadi, S.

In this paper, the feasibility of using ferroelectric materials as a cooling device or solid-state refrigerator based on the electrocaloric effect has been considered. The electrocaloric responses of two different ferroelectric capacitors (PMN-25PT, PZN-4.5PT) are studied. In this study, the dynamics of temperature variation at the edges of a layered structure comprised of an electrocaloric material with heatconducting elements on its sides to an applied periodic electric field have been studied. Electrocaloric elements can generate directed heat flux as a thermal pump by alternative switching. A temperature reduction of 6° is obtained in an electric field of 1 KV/mm at a frequency of 1 Hz for PMN-25PT material after applying 80 cycles. It is shown that the type of applied electric pulses and ferroelectric material affect the results.

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Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:58 ,  Issue: 3 )