A NEW CONCEPT REFRIGERATION MODEL BASED ON THERMAL SWITCH AND NUMERICAL CALCULATION

摘要

A new concept electrocaloric effect(ECE) refrigeration model based on a certain thermal switch(TS) isrnpresented in this paper. In the model tabular ECE materials and tabular TS alternately arrange parallelly andrntightly, forming many units of the same structure. The TS has two states, on and off according to externalrncontrol orders. The electric field is applied in every other ECE material sheet and let every other TS sheet bernon within the fore semi-period at the same time, and alternately going adversely within the rear semi-period.rnThe thermal conductivity of the TS in the off-state should be much lower than that in the on-state. Therncalculation shows that the cooling power with 20 K temperature span may be more than 1 kW per kg ECErnmaterial, and unit area cooling power may be more than 8 KW/m2 when the sheet is 0.15mm thin. Inrnaddition the COP may be up to 12 at most.