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.
NETL
NSTL
万方数据
