The electrocaloric effect (ECE) refers to the change in temperature and/or entropy of a dielectric material due to the electric field induced change of dipolar states. Giant ECE is discovered in P(VDF-TrFE) ferroelectric copolymers near ferroelectric-paraelectric (F-P) transition temperature which is normally much higher than room temperature. This paper presents the two defect-inducing methods to lower and broaden working temperature range of P(VDF-TrFE) based copolymers for ECE, and thus make it preferable for practical cooling device. 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/cm2) and significantly higher coefficient of performance (COP) can be achieved (50% of Carnot efficiency).
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ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels
July 8–12, 2012
Rio Grande, Puerto Rico, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4478-6
PROCEEDINGS PAPER
Compact Cooling Devices Based on Giant Electrocaloric Effect Dielectrics Available to Purchase
Haiming Gu,
Haiming Gu
The Pennsylvania State University, University Park, PA
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Xinyu Li,
Xinyu Li
The Pennsylvania State University, University Park, PA
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S. G. Lu,
S. G. Lu
The Pennsylvania State University, University Park, PA
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Minren Lin,
Minren Lin
The Pennsylvania State University, University Park, PA
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Xiaoshi Qian,
Xiaoshi Qian
The Pennsylvania State University, University Park, PA
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J. P. Cheng,
J. P. Cheng
The Pennsylvania State University, University Park, PA
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Q. M. Zhang,
Q. M. Zhang
The Pennsylvania State University, University Park, PA
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Ailan Cheng,
Ailan Cheng
Strategic Polymer Sciences, Inc., State College, PA
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Brent Craven
Brent Craven
The Pennsylvania State University, University Park, PA
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Haiming Gu
The Pennsylvania State University, University Park, PA
Xinyu Li
The Pennsylvania State University, University Park, PA
S. G. Lu
The Pennsylvania State University, University Park, PA
Minren Lin
The Pennsylvania State University, University Park, PA
Xiaoshi Qian
The Pennsylvania State University, University Park, PA
J. P. Cheng
The Pennsylvania State University, University Park, PA
Q. M. Zhang
The Pennsylvania State University, University Park, PA
Ailan Cheng
Strategic Polymer Sciences, Inc., State College, PA
Brent Craven
The Pennsylvania State University, University Park, PA
Paper No:
HT2012-58128, pp. 635-639; 5 pages
Published Online:
July 24, 2013
Citation
Gu, H, Li, X, Lu, SG, Lin, M, Qian, X, Cheng, JP, Zhang, QM, Cheng, A, & Craven, B. "Compact Cooling Devices Based on Giant Electrocaloric Effect Dielectrics." Proceedings of the ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 2: Heat Transfer Enhancement for Practical Applications; Fire and Combustion; Multi-Phase Systems; Heat Transfer in Electronic Equipment; Low Temperature Heat Transfer; Computational Heat Transfer. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 635-639. ASME. https://doi.org/10.1115/HT2012-58128
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