Compact cooling devices based on giant electrocaloric effect dielectrics

Xinyu Li, Haiming Gu, Xiaoshi Qian, Qiming Zhang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    6 Scopus citations

    Abstract

    The entropy and/or temperature change of material with respect to electric fields is known as electrocaloric effect (ECE). Giant ECE is discovered in P(VDF-TrFE) ferroelectric copolymers near ferroelectric-paraelectric (F-P) transition temperature. F-P transition is normally much higher than room temperature around which is preferred by working temperature of cooling device configuration. This paper presents the two defect-inducing methods to lower and broaden working temperature range of P(VDF-TrFE) based copolymers for ECE. Giant ECE is experimentally demonstrated in large temperature range (0-55°C). In addition, an electrocaloric oscillatory refrigerator (ECOR) was proposed and simulated by finite volume method and its high performance was theoretically demonstrated. Temperature gradient larger than 30 °C can be maintained across the two sides of a 1 cm device. For ΔT=20 °C cooling condition, a high cooling power (5.4 W/cm 2) and significantly higher coefficient of performance (COP) can be achieved (50% of Carnot efficiency).

    Original languageEnglish (US)
    Title of host publicationProceedings of the 13th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2012
    Pages934-937
    Number of pages4
    DOIs
    StatePublished - Sep 18 2012
    Event13th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2012 - San Diego, CA, United States
    Duration: May 30 2012Jun 1 2012

    Publication series

    NameInterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM
    ISSN (Print)1936-3958

    Other

    Other13th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2012
    Country/TerritoryUnited States
    CitySan Diego, CA
    Period5/30/126/1/12

    All Science Journal Classification (ASJC) codes

    • Control and Systems Engineering
    • Electrical and Electronic Engineering

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