COMPOSITES WITH ENHANCED THERMAL CONDUNCTIVITY AND ELECTROCALORIC STRENGTH FOR HIGH-POWER REFRIGERATION APPLICATIONS

Here the electrocaloric effect（ECE）and thermal conductivity of polymer-based electrocaloric（EC）materials are improved by means of the preparation of BaZr0.2Ti0.8O3-P（VDF-TrFE-CFE）nanocomposites. In addition，high-power refrigeration devices based on fluid-solid conjugated heat transfer were designed and numerical simulations were carried out to evaluate the cooling capacity and efficiency. The results show that T-BZT-10%（with a BZT mass fraction of 10%）has significantly ECE and heat transfer performance than that of the base terpolymer. Simulation results about the devices show that at a temperature span of 10 K，a system with T-BZT-10% as the core refrigeration element can achieve a cooling power density of 31.0 W/cm3 and total cooling power of 1060.4 W（more than a 10-fold cooling power improvement than that of the base EC device）with a COP of 5.2. © 2024 Science Press. All rights reserved.