The surface of planet exists a substantial amount of solid granular materials(SGs)that inherently contain significant thermal energy under solar irradiation.This paper introduces a solid granular energy harvesting device(SGEHD)founded on the principles of thermoelectricity.Ad-ditionally,a one-dimensional unsteady-state phase-change temperature control and thermoelectric power generation model is established to calculate the operational performance of SGEHD in desert and lunar environments.Furthermore,a comparative analysis is conducted to assess the impact of different initial temperatures,phase-change materials,and phase-change layer thicknesses on the de-vice output power.Through computational simulations,SGEHD demonstrates a peak daily average power of 1.47 W·m-2 in desert and 14.76 W·m-2 on the lunar surface.This device takes advantage of the diurnal temperature fluctuation which representing a promising future of diversifying energy sources in extreme environmental conditions.
energy harvestingthermoelectric generatorphase change materialsenthalpy method
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