Abstract
In this study the thermoelectric properties of perovskite type Ca-Mn-O3 compounds are estimated for the operating range of 850-1150 K. The optimization of design module for maximum power output is obtained using the analytical expression for power of Thermoelectric Generator (TEG). For the optimum length of 1.4 I¼m and with a cross sectional area of 0.3×0.3 I¼m the power obtained is 4.635 nW. For the same optimum length of 1.4 I¼m when the cross sectional area is increased to 0.6×0.6 I¼m the power obtained is 18.54 nW. A bridge type micro TEG (I¼TEG) with two thermo couples in series and four thermocouples in parallel are simulated and the temperature and voltage distribution obtained. The variation of power density for varying the gap length is analyzed. The calculated power density is 2.75 mW/(cm2K2) for optimum length of 1.4 I¼m with a gap length of 0.3 I¼m and cross sectional area of 0.6×0.6 I¼m. The calculated power density is increased to 4.0748 mW/(cm2K2) for the same optimum length of 1.4 I¼m when the gap length is 0.1 I¼m and with the same cross sectional area of 0.6×0.6 I¼m. To power up a 75W LED street light the required number of devices connected in series is 322 and in parallel is 12,658228 with the impedance matching between the micro thermoelectric generator and the load.
Highlights
Due to the rise in energy demand and pollution control requirement, the demand for the clean energy system is increasing
The power density is increased by decreasing the die area
This is achieved by decreasing the gap length between the thermo leg and increasing the length of thermo leg
Summary
Due to the rise in energy demand and pollution control requirement, the demand for the clean energy system is increasing. Figure shows the voltage of μTEG for varying the thermo leg length from 0 to 2.8 μm in steps of 0.2 μm with a cross sectional area of 0.6×0.6 μm. Figure shows the power of μTEG for varying the thermo leg length from 0 to 2.8 μm in steps of 0.2 μm with a cross sectional area of 0.6×0.6 μm.
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