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Phenomenology theory of ferroelectrics is developed to solve pyroelectric energy conversion performances in Olson cycle by using rotation and coupling of dipoles depending on temperature and electric field. Numerical simulation shows electric field related pathway of cycle. The conversion efficiency of an Olson cycle has a peak at temperature over Curie temperature, which is higher for increased low temperature point. A horary conversion efficiency is developed to compare conversion efficiencies in different temperature range. The conclusion is that the horary efficiency is higher when the low temperature point is higher and the high temperature is lower.

Pyroelectric energy conversion efficiency of ferroelectrics in Olson cycle