2017
DOI: 10.1002/er.3749
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Abstract: Summary Pyroelectric energy conversion is both simulated and realized on thin film lead zirconate titanate capacitors. The thermodynamics of the energy conversion cycle were explored, and the performance of the Brayton cycle was compared with the conventional Ericsson pyroelectric cycle. Cycle performance was examined using coefficients extracted from measured isothermal polarization hysteresis loops. It was found that the Brayton cycle is slightly more efficient than the Ericsson cycle over the range of tempe… Show more

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Cited by 14 publications
(6 citation statements)
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“…1d), and Ericsson (or Olsen) cycles (i.e., two isothermal and isoelectric processes, Fig. 1e), are used in various situations depending on the sample geometry and heat source 8,9 . The Olsen cycle has been most widely employed and has been demonstrated to produce some of the highest PEC efficiencies, defined as: 10…”
mentioning
confidence: 99%
“…1d), and Ericsson (or Olsen) cycles (i.e., two isothermal and isoelectric processes, Fig. 1e), are used in various situations depending on the sample geometry and heat source 8,9 . The Olsen cycle has been most widely employed and has been demonstrated to produce some of the highest PEC efficiencies, defined as: 10…”
mentioning
confidence: 99%
“…Figure 4f illustrates the schematic of Brayton cycle, the enclosed cycle is composite of two isentropic processes (A→B, C→D) and two isoelectric processes (B→C, D→A). [ 149 ] The first step is charging the pyroelectric material in isentropic condition. Next, the pyroelectric material is heated at constant electric field, which followed by isentropic charging.…”
Section: Pyroelectric Thermal Energy Scavenging Devicesmentioning
confidence: 99%
“…Increasing the applied electric field is critical to obtaining efficient energy conversion. In thin films with intrinsically high electric breakdown and low thermal mass, the Brayton‐style pyroelectric cycle yields better efficiency, with adiabatic charging and discharging paired with isoelectric heating and cooling . The work for a pyroelectric Brayton cycle isWB=CEfalse(TH+TLfalse)CETLepΔECnormalECETHepΔECEwhere CnormalE is the volumetric heat capacity, p is the pyroelectric coefficient, ΔE is the applied electric field amplitude, and TnormalH and TnormalL are the high and low temperatures, respectively.…”
Section: Pyroelectric Coefficients Dielectric Permittivity Heat Capmentioning
confidence: 99%
“…The work for a pyroelectric Brayton cycle isWB=CEfalse(TH+TLfalse)CETLepΔECnormalECETHepΔECEwhere CnormalE is the volumetric heat capacity, p is the pyroelectric coefficient, ΔE is the applied electric field amplitude, and TnormalH and TnormalL are the high and low temperatures, respectively. The efficiency of the Brayton cycle isηnormalB=1epΔECnormalEwhich is always higher than Olsen‐style cycles without regeneration . Thin‐film geometries can also enable fast thermal cycling, owing the fact that the volume of the active pyroelectric is small.…”
Section: Pyroelectric Coefficients Dielectric Permittivity Heat Capmentioning
confidence: 99%
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