Pyroelectric power generation from the waste heat of automotive exhaust gas

Abstract

A waste heat recovery system is investigated basically. Original electro-thermodynamic cycle and novel system are expected to be viable in any heat sources with time dependent temperature changes instead of the spatial temperature gradient.

Hybrid energy harvesting technology: From materials, structural design, system integration to applications

“…However, this effect requires temperature oscillation, which poses challenges in generating such a fluctuation. Natural temperature fluctuations are rare but exist in conditions with variable convection conditions [98], light irradiance variation [99,100] or exhaust gas [101][102][103], as shown in Fig. 6(b) and (c).…”

“…Typical structural configurations for pyroelectric energy harvesters. (a) Liquid-metal based pyroelectric harvester [108], (b) pyroelectric harvester for exhaust gas heat recovery [103], (c) pyroelectric harvester for water splitting [100], (d) oscillating heat pipe-based harvester [107] and (e) wind-driven pyroelectric harvester [105].…”

“…Typical structural configurations for PEHs including (a) rectangular [40], (b) triangular [43], (c) taper [44], (d) S-shape [45], (e) arc-shape [46], and (f) flextensional structures [48]. [108], (b) pyroelectric harvester for exhaust gas heat recovery [103], (c) pyroelectric harvester for water splitting [100], (d) oscillating heat pipe-based harvester [107] and (e) wind-driven pyroelectric harvester [105].…”

Enhancing low‐temperature energy harvesting by lead‐free ferroelectric Ba(Zr0.1Ti0.9)O3

“…In 2015, Kim et al combined the Olsen and Stirling cycles to form a new electro-thermodynamic cycle. [18][19][20][21] The Kim cycle can extract higher pyroelectric power from ferroelectric materials than the conventional Olsen cycle. The Kim cycle consists of four steps.…”

Predicting performance of thermal-electrical cycles in pyroelectric power generation

“…In particular, the temperature of exhaust from a car is greatly changed by acceleration and deceleration. [4][5][6] Therefore, a power generation technology suitable for variable-temperature exhaust heat is necessary to realize an efficient WHRS for vehicles. Ferroelectrics and other pyroelectric materials show great potential for such an application.…”