Premium
Electrostatic Actuating Double‐Unit Electrocaloric Cooling Device with High Efficiency
Author(s) -
Bo Yiwen,
Zhang Quan,
Cui Heng,
Wang Mengyan,
Zhang Chunyang,
He Wen,
Fan Xiangqian,
Lv Yiwen,
Fu Xiang,
Liang Jiajie,
Huang Yi,
Ma Rujun,
Chen Yongsheng
Publication year - 2021
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202003771
Subject(s) - refrigeration , materials science , cooling capacity , coefficient of performance , active cooling , optoelectronics , water cooling , nuclear engineering , mechanical engineering , heat pump , heat exchanger , engineering
Compact solid‐state refrigeration systems that offer a high specific cooling power and a high coefficient of performance (COP) are desirable in a wide range of applications where efficient and localized heat transfer is required. Here, a double‐unit electrocaloric (EC) polymer‐based refrigeration device with high intrinsic thermodynamic efficiency is demonstrated using a flexible EC polymer film with improved performance by doping plasticizer and an electrostatic actuation mechanism. The double‐unit refrigeration device achieves a large temperature span of 4.8 K, which is 71% higher than that of the single‐unit device. A specific cooling power of 3.6 W g −1 and a maximum COP of 8.3 for the cooling device are produced. The surface temperature of a central processing unit (CPU) cooled by an active EC device is 22.4 K lower than that of the CPU cooled in air. The highly efficient and compact EC cooling device demonstrated here not only leapfrogs the performance of existing solid‐state cooling technologies, but also brings solid state cooling closer to reality for a variety of practical applications that require compact or mechanically flexible refrigeration.