Kwon, Beomjin Roh, Im-Jun Baek, Seung-Hyub Kim, Seong Keun Kim, Jin-Sang Kang, Chong-Yun 2024-01-20T09:34:47Z 2024-01-20T09:34:47Z 2021-09-04 2014-05-26 0003-6951 https://pubs.kist.re.kr/handle/201004/126781 We measure and model the dynamic temperature response of electrocaloric (EC) multilayer capacitors (MLCs) which have been recently highlighted as novel solid-state refrigerators. The MLC temperature responses depend on the operation voltage waveform, thus we consider three types of voltage waveforms, which include square, triangular, and trapezoidal. Further, to implement an effective refrigeration cycle, the waveform frequency and duty cycle should be carefully chosen. First, our model is fitted to the measurements to evaluate an effective EC power and thermal properties, and calculates an effective cooling power for an EC MLC. The prediction shows that for a MLC with a thermal relaxation time for cooling, t(rc), a square voltage waveform with a duty cycle of 0< d <= 0.3 and a period of t(rc)< P <= 1.4t(rc) provides the maximum cooling power. This work will help to improve the implementing methods for EC refrigeration cycles. (C) 2014 AIP Publishing LLC. English AMER INST PHYSICS Dynamic temperature response of electrocaloric multilayer capacitors Article 10.1063/1.4875023 1 APPLIED PHYSICS LETTERS, v.104, no.21 APPLIED PHYSICS LETTERS 104 21 scie scopus 000337143000065 2-s2.0-84901784903 Physics, Applied Physics Article