Abstract

The net radiative power of a black-pained surface at an ambient temperature of the ambient was measured at night, and the result was used to predict the temperature distributions of a radiative cooling system, which consisted of a pump, a thermal energy storage tank of 66.7 liters in the volume, and two radiator plates, each of which effective length was 1.92 m and width was 0.93 m. The net radiative power obtained on a clear night was about 4060 W/m2 in the summer and 6080 W/m2 in the fall and winter. The average temperature of the thermal energy storage became about 2°C below the ambient in the fall and 5°C below in the winter. The analytical results of the temperature distributions of the radiator and the water in the storage tank agreed well with the experimental results.

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