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- W3094204572 abstract "The possibility of night-time power generation has recently stimulated interest in using the radiative sky cooling mechanism with thermoelectric generators (TEG). These passive, low-temperature difference devices have been shown to generate electricity at night with no active input of heat needed, instead using the ambient air itself as the heat source. Here, we optimize both the geometry and operating conditions of radiative cooling driven thermoelectric (RC-TE) generators. We determine the optimal operating conditions, including maximum power point and maximum efficiency point, by developing a combined thermal and electrical model. Our results show that the optimal operating condition results in larger power output than was previously expected. Moreover, we show that maximum power density occurs when the area ratio between cooler and P or N element reaches an optimal value. Finally, we perform a parametric study that takes account of environmental and structural parameters to improve the performance of the RC-TE device, including enhancing heat transfer between the hot surface and ambient air, suppressing the cooling loss of the radiative cooler, and optimizing the geometry of individual thermocouples. Our work identifies how to maximize the output of RC-TE devices and provides comprehensive guidance on making use of this new passive power generation method." @default.
- W3094204572 created "2020-10-29" @default.
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- W3094204572 date "2020-10-19" @default.
- W3094204572 modified "2023-10-14" @default.
- W3094204572 title "Modeling and optimization of radiative cooling based thermoelectric generators" @default.
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- W3094204572 doi "https://doi.org/10.1063/5.0022667" @default.
- W3094204572 hasPublicationYear "2020" @default.
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