Impact of hysteresis on caloric cooling performance

Caloric cooling relies on reversible temperature changes in solids driven by an externally applied field, such as a magnetic electric uniaxial stress or hydrostatic pressure. Materials exhibiting solid-state caloric effect may provide the basis for alternative to conventional vapor compression technologies. First-order phase transition materials are promising materials, they yield large reported adiabatic compared second-order but exhibit hysteresis behavior that leads possible degradation performance. This work quantifies numerically impact of performance cycle using different modeled and regenerator with fixed geometry. A previously developed 1D active model has been used additional term predict how range realistic values affect The is quantified terms power, coefficient (COP), second-law efficiency operating conditions. shows reduces efficiency, COP falling up 50% entropy generation (qhys) increases from 0.5% 1%. At higher working frequencies, decreases further due increased internal heating material. Regenerator beds lower specific heat isothermal change less affected hysteresis. Low show positive power 2% qhys whereas high cannot tolerate more than 0.04% qhys.