Feasibility of realizing daytime solar heating and radiative cooling simultaneously with a novel structure

An Emerging Energy Technology: Self‐Uninterrupted Electricity Power Harvesting from the Sun and Cold Space

“…Reproduced with permission. [ 35 ] Copyright 2022, Elsevier. Thermoelectric conversion g) efficiency distribution and h) theoretical power density distribution varied with absorber and emitter temperature ( zT = 2 is taken in calculations).…”

“…[ 34 ] When the solar absorber and radiative cooler are deployed together in the same physical space to respectively absorb sunlight and emit thermal radiation, the solar irradiance intensity as well as the temperature of the solar absorber will affect the cooling performance of the radiative cooler, whether in a non‐vacuum (Figure 2e) or a vacuum state (Figure 2f). [ 35 ] In order to relieve the radiative cooler from absorbing unwanted heat from the solar absorber, strict thermal management is required to reduce the convection and radiation thermal coupling between the two parts.…”

“…The coupling effect of solar irradiance and absorber temperature on the emitter temperature profile in e) non-vacuum case and f) vacuum case. Reproduced with permission [35]. Copyright 2022, Elsevier.…”

Experimental study on a hybrid solar photothermic and radiative cooling collector equipped with a rotatable absorber/emitter plate

“…Chen et al [31] deployed a vacuum device to simultaneously conduct solar heating and radiative cooling with a mid-infrared transparent solar absorber setting above a radiative emitter, but the stagnation temperature of the absorber is only up to 24.4 °C higher than the ambient temperature under intensive solar radiation, indicating that the solar thermal performance of the absorber is poor. In fact, for the purpose of realizing daytime solar heating and radiative cooling simultaneously, the solar absorber temperature should be depressed within a low level to avoid radiating overmuch heat to the radiative emitter [32].…”