Abstract
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, trc, a square voltage waveform with a duty cycle of 0 < d-≤ 0.3 and a period of trc < P-≤ 1.4trc provides the maximum cooling power. This work will help to improve the implementing methods for EC refrigeration cycles.
| Original language | English |
|---|---|
| Article number | 213902 |
| Journal | Applied Physics Letters |
| Volume | 104 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 2014 May 26 |
Fingerprint
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Dynamic temperature response of electrocaloric multilayer capacitors. / Kwon, Beomjin; Roh, Im Jun; Baek, Seung Hyub; Keun Kim, Seong; Kim, Jin Sang; Kang, Chong-Yun.
In: Applied Physics Letters, Vol. 104, No. 21, 213902, 26.05.2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dynamic temperature response of electrocaloric multilayer capacitors
AU - Kwon, Beomjin
AU - Roh, Im Jun
AU - Baek, Seung Hyub
AU - Keun Kim, Seong
AU - Kim, Jin Sang
AU - Kang, Chong-Yun
PY - 2014/5/26
Y1 - 2014/5/26
N2 - 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, trc, a square voltage waveform with a duty cycle of 0 < d-≤ 0.3 and a period of trc < P-≤ 1.4trc provides the maximum cooling power. This work will help to improve the implementing methods for EC refrigeration cycles.
AB - 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, trc, a square voltage waveform with a duty cycle of 0 < d-≤ 0.3 and a period of trc < P-≤ 1.4trc provides the maximum cooling power. This work will help to improve the implementing methods for EC refrigeration cycles.
UR - http://www.scopus.com/inward/record.url?scp=84901784903&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84901784903&partnerID=8YFLogxK
U2 - 10.1063/1.4875023
DO - 10.1063/1.4875023
M3 - Article
VL - 104
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 21
M1 - 213902
ER -