We discuss passive cooling of ethylene gas which radiates predominantly in the wavelength range for which the atmospheric counter radiation is low for dry air. The radiative properties of the gas were investigated by spectrophotometry, and the parameters relevant for efficient cooling were computed. Daytime cooling to a temperature ∼10 °C below that of the ambient was demonstrated with a simple device.
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Hjortsberg et al. (1981) studied this question.
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